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init rewrite
2020-05-05 09:42:02 +00:00
/**
* The MIT License (MIT)
*
* Copyright (c) 2015-2018 Nicholas Fraser
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
/*
* This is the MPack 1.0 amalgamation package.
*
* http://github.com/ludocode/mpack
*/
#ifndef MPACK_H
#define MPACK_H 1
#define MPACK_AMALGAMATED 1
#define MPACK_RELEASE_VERSION 1
#if defined(MPACK_HAS_CONFIG) && MPACK_HAS_CONFIG
#include "mpack-config.h"
#endif
/* mpack/mpack-defaults.h.h */
/**
* @name Features
* @{
*/
/**
* @def MPACK_READER
*
* Enables compilation of the base Tag Reader.
*/
#ifndef MPACK_READER
#define MPACK_READER 1
#endif
/**
* @def MPACK_EXPECT
*
* Enables compilation of the static Expect API.
*/
#ifndef MPACK_EXPECT
#define MPACK_EXPECT 1
#endif
/**
* @def MPACK_NODE
*
* Enables compilation of the dynamic Node API.
*/
#ifndef MPACK_NODE
#define MPACK_NODE 1
#endif
/**
* @def MPACK_WRITER
*
* Enables compilation of the Writer.
*/
#ifndef MPACK_WRITER
#define MPACK_WRITER 1
#endif
/**
* @def MPACK_COMPATIBILITY
*
* Enables compatibility features for reading and writing older
* versions of MessagePack.
*
* This is disabled by default. When disabled, the behaviour is equivalent to
* using the default version, @ref mpack_version_current.
*
* Enable this if you need to interoperate with applications or data that do
* not support the new (v5) MessagePack spec. See the section on v4
* compatibility in @ref docs/protocol.md for more information.
*/
#ifndef MPACK_COMPATIBILITY
#define MPACK_COMPATIBILITY 0
#endif
/**
* @def MPACK_EXTENSIONS
*
* Enables the use of extension types.
*
* This is disabled by default. Define it to 1 to enable it. If disabled,
* functions to read and write extensions will not exist, and any occurrence of
* extension types in parsed messages will flag @ref mpack_error_invalid.
*
* MPack discourages the use of extension types. See the section on extension
* types in @ref docs/protocol.md for more information.
*/
#ifndef MPACK_EXTENSIONS
#define MPACK_EXTENSIONS 0
#endif
/**
* @}
*/
/**
* @name Dependencies
* @{
*/
/**
* @def MPACK_HAS_CONFIG
*
* Enables the use of an @c mpack-config.h configuration file for MPack.
* This file must be in the same folder as @c mpack.h, or it must be
* available from your project's include paths.
*/
// This goes in your project settings.
/**
* @def MPACK_STDLIB
*
* Enables the use of C stdlib. This allows the library to use malloc
* for debugging and in allocation helpers.
*/
#ifndef MPACK_STDLIB
#define MPACK_STDLIB 1
#endif
/**
* @def MPACK_STDIO
*
* Enables the use of C stdio. This adds helpers for easily
* reading/writing C files and makes debugging easier.
*/
#ifndef MPACK_STDIO
#define MPACK_STDIO 1
#endif
/**
* @}
*/
/**
* @name System Functions
* @{
*/
/**
* @def MPACK_MALLOC
*
* Defines the memory allocation function used by MPack. This is used by
* helpers for automatically allocating data the correct size, and for
* debugging functions. If this macro is undefined, the allocation helpers
* will not be compiled.
*
* The default is @c malloc() if @ref MPACK_STDLIB is enabled.
*/
/**
* @def MPACK_FREE
*
* Defines the memory free function used by MPack. This is used by helpers
* for automatically allocating data the correct size. If this macro is
* undefined, the allocation helpers will not be compiled.
*
* The default is @c free() if @ref MPACK_MALLOC has not been customized and
* @ref MPACK_STDLIB is enabled.
*/
/**
* @def MPACK_REALLOC
*
* Defines the realloc function used by MPack. It is used by growable
* buffers to resize more efficiently.
*
* The default is @c realloc() if @ref MPACK_MALLOC has not been customized and
* @ref MPACK_STDLIB is enabled.
*
* This is optional, even when @ref MPACK_MALLOC is used. If @ref MPACK_MALLOC is
* set and @ref MPACK_REALLOC is not, @ref MPACK_MALLOC is used with a simple copy
* to grow buffers.
*/
#if defined(MPACK_STDLIB) && MPACK_STDLIB && !defined(MPACK_MALLOC)
#define MPACK_MALLOC malloc
#define MPACK_REALLOC realloc
#define MPACK_FREE free
#endif
/**
* @}
*/
/**
* @name Debugging Options
*/
/**
* @def MPACK_DEBUG
*
* Enables debug features. You may want to wrap this around your
* own debug preprocs. By default, this is enabled if @c DEBUG or @c _DEBUG
* are defined. (@c NDEBUG is not used since it is allowed to have
* different values in different translation units.)
*/
#if !defined(MPACK_DEBUG) && (defined(DEBUG) || defined(_DEBUG))
#define MPACK_DEBUG 1
#endif
/**
* @def MPACK_STRINGS
*
* Enables descriptive error and type strings.
*
* This can be turned off (by defining it to 0) to maximize space savings
* on embedded devices. If this is disabled, string functions such as
* mpack_error_to_string() and mpack_type_to_string() return an empty string.
*/
#ifndef MPACK_STRINGS
#define MPACK_STRINGS 1
#endif
/**
* Set this to 1 to implement a custom @ref mpack_assert_fail() function.
* See the documentation on @ref mpack_assert_fail() for details.
*
* Asserts are only used when @ref MPACK_DEBUG is enabled, and can be
* triggered by bugs in MPack or bugs due to incorrect usage of MPack.
*/
#ifndef MPACK_CUSTOM_ASSERT
#define MPACK_CUSTOM_ASSERT 0
#endif
/**
* @def MPACK_READ_TRACKING
*
* Enables compound type size tracking for readers. This ensures that the
* correct number of elements or bytes are read from a compound type.
*
* This is enabled by default in debug builds (provided a @c malloc() is
* available.)
*/
#if !defined(MPACK_READ_TRACKING) && \
defined(MPACK_DEBUG) && MPACK_DEBUG && \
defined(MPACK_READER) && MPACK_READER && \
defined(MPACK_MALLOC)
#define MPACK_READ_TRACKING 1
#endif
/**
* @def MPACK_WRITE_TRACKING
*
* Enables compound type size tracking for writers. This ensures that the
* correct number of elements or bytes are written in a compound type.
*
* Note that without write tracking enabled, it is possible for buggy code
* to emit invalid MessagePack without flagging an error by writing the wrong
* number of elements or bytes in a compound type. With tracking enabled,
* MPack will catch such errors and break on the offending line of code.
*
* This is enabled by default in debug builds (provided a @c malloc() is
* available.)
*/
#if !defined(MPACK_WRITE_TRACKING) && \
defined(MPACK_DEBUG) && MPACK_DEBUG && \
defined(MPACK_WRITER) && MPACK_WRITER && \
defined(MPACK_MALLOC)
#define MPACK_WRITE_TRACKING 1
#endif
/**
* @}
*/
/**
* @name Miscellaneous Options
* @{
*/
/**
* Whether to optimize for size or speed.
*
* Optimizing for size simplifies some parsing and encoding algorithms
* at the expense of speed, and saves a few kilobytes of space in the
* resulting executable.
*
* This automatically detects -Os with GCC/Clang. Unfortunately there
* doesn't seem to be a macro defined for /Os under MSVC.
*/
#ifndef MPACK_OPTIMIZE_FOR_SIZE
#ifdef __OPTIMIZE_SIZE__
#define MPACK_OPTIMIZE_FOR_SIZE 1
#else
#define MPACK_OPTIMIZE_FOR_SIZE 0
#endif
#endif
/**
* Stack space in bytes to use when initializing a reader or writer
* with a stack-allocated buffer.
*/
#ifndef MPACK_STACK_SIZE
#define MPACK_STACK_SIZE 4096
#endif
/**
* Buffer size to use for allocated buffers (such as for a file writer.)
*
* Starting with a single page and growing as needed seems to
* provide the best performance with minimal memory waste.
* Increasing this does not improve performance even when writing
* huge messages.
*/
#ifndef MPACK_BUFFER_SIZE
#define MPACK_BUFFER_SIZE 4096
#endif
/**
* Minimum size of an allocated node page in bytes.
*
* The children for a given compound element must be contiguous, so
* larger pages than this may be allocated as needed. (Safety checks
* exist to prevent malicious data from causing too large allocations.)
*
* See @ref mpack_node_data_t for the size of nodes.
*
* Using as many nodes fit in one memory page seems to provide the
* best performance, and has very little waste when parsing small
* messages.
*/
#ifndef MPACK_NODE_PAGE_SIZE
#define MPACK_NODE_PAGE_SIZE 4096
#endif
/**
* The initial depth for the node parser. When MPACK_MALLOC is available,
* the node parser has no practical depth limit, and it is not recursive
* so there is no risk of overflowing the call stack.
*/
#ifndef MPACK_NODE_INITIAL_DEPTH
#define MPACK_NODE_INITIAL_DEPTH 8
#endif
/**
* The maximum depth for the node parser if @ref MPACK_MALLOC is not available.
*/
#ifndef MPACK_NODE_MAX_DEPTH_WITHOUT_MALLOC
#define MPACK_NODE_MAX_DEPTH_WITHOUT_MALLOC 32
#endif
/**
* @}
*/
/**
* @}
*/
/* mpack/mpack-platform.h.h */
/**
* @file
*
* Abstracts all platform-specific code from MPack. This contains
* implementations of standard C functions when libc is not available,
* as well as wrappers to library functions.
*/
#ifndef MPACK_PLATFORM_H
#define MPACK_PLATFORM_H 1
/* Pre-include checks */
#if defined(_MSC_VER) && _MSC_VER < 1800 && !defined(__cplusplus)
#error "In Visual Studio 2012 and earlier, MPack must be compiled as C++. Enable the /Tp compiler flag."
#endif
#if defined(WIN32) && defined(MPACK_INTERNAL) && MPACK_INTERNAL
#define _CRT_SECURE_NO_WARNINGS 1
#endif
/* Doxygen preprocs */
#if defined(MPACK_DOXYGEN) && MPACK_DOXYGEN
#define MPACK_HAS_CONFIG 0
// We give these their default values of 0 here even though they are defined to
// 1 in the doxyfile. Doxygen will show this as the value in the docs, even
// though it ignores it when parsing the rest of the source. This is what we
// want, since we want the documentation to show these defaults but still
// generate documentation for the functions they add when they're on.
#define MPACK_COMPATIBILITY 0
#define MPACK_EXTENSIONS 0
#endif
/* Include the custom config file if enabled */
#if defined(MPACK_HAS_CONFIG) && MPACK_HAS_CONFIG
/* #include "mpack-config.h" */
#endif
/*
* Now that the optional config is included, we define the defaults
* for any of the configuration options and other switches that aren't
* yet defined.
*/
#if defined(MPACK_DOXYGEN) && MPACK_DOXYGEN
/* #include "mpack-defaults-doxygen.h" */
#else
/* #include "mpack-defaults.h" */
#endif
/*
* All remaining configuration options that have not yet been set must
* be defined here in order to support -Wundef.
*/
#ifndef MPACK_DEBUG
#define MPACK_DEBUG 0
#endif
#ifndef MPACK_CUSTOM_BREAK
#define MPACK_CUSTOM_BREAK 0
#endif
#ifndef MPACK_READ_TRACKING
#define MPACK_READ_TRACKING 0
#endif
#ifndef MPACK_WRITE_TRACKING
#define MPACK_WRITE_TRACKING 0
#endif
#ifndef MPACK_EMIT_INLINE_DEFS
#define MPACK_EMIT_INLINE_DEFS 0
#endif
#ifndef MPACK_AMALGAMATED
#define MPACK_AMALGAMATED 0
#endif
#ifndef MPACK_RELEASE_VERSION
#define MPACK_RELEASE_VERSION 0
#endif
#ifndef MPACK_INTERNAL
#define MPACK_INTERNAL 0
#endif
#ifndef MPACK_NO_BUILTINS
#define MPACK_NO_BUILTINS 0
#endif
/* System headers (based on configuration) */
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS 1
#endif
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS 1
#endif
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>
#include <limits.h>
#if MPACK_STDLIB
#include <string.h>
#include <stdlib.h>
#endif
#if MPACK_STDIO
#include <stdio.h>
#include <errno.h>
#endif
/*
* Header configuration
*/
#ifdef __cplusplus
#define MPACK_EXTERN_C_START extern "C" {
#define MPACK_EXTERN_C_END }
#else
#define MPACK_EXTERN_C_START /* nothing */
#define MPACK_EXTERN_C_END /* nothing */
#endif
/* GCC versions from 4.6 to before 5.1 warn about defining a C99
* non-static inline function before declaring it (see issue #20) */
#ifdef __GNUC__
#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#ifdef __cplusplus
#define MPACK_DECLARED_INLINE_WARNING_START \
_Pragma ("GCC diagnostic push") \
_Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"")
#else
#define MPACK_DECLARED_INLINE_WARNING_START \
_Pragma ("GCC diagnostic push") \
_Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"")
#endif
#define MPACK_DECLARED_INLINE_WARNING_END \
_Pragma ("GCC diagnostic pop")
#endif
#endif
#ifndef MPACK_DECLARED_INLINE_WARNING_START
#define MPACK_DECLARED_INLINE_WARNING_START /* nothing */
#define MPACK_DECLARED_INLINE_WARNING_END /* nothing */
#endif
/* GCC versions before 4.8 warn about shadowing a function with a
* variable that isn't a function or function pointer (like "index") */
#ifdef __GNUC__
#if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
#define MPACK_WSHADOW_WARNING_START \
_Pragma ("GCC diagnostic push") \
_Pragma ("GCC diagnostic ignored \"-Wshadow\"")
#define MPACK_WSHADOW_WARNING_END \
_Pragma ("GCC diagnostic pop")
#endif
#endif
#ifndef MPACK_WSHADOW_WARNING_START
#define MPACK_WSHADOW_WARNING_START /* nothing */
#define MPACK_WSHADOW_WARNING_END /* nothing */
#endif
#define MPACK_HEADER_START \
MPACK_EXTERN_C_START \
MPACK_WSHADOW_WARNING_START \
MPACK_DECLARED_INLINE_WARNING_START
#define MPACK_HEADER_END \
MPACK_DECLARED_INLINE_WARNING_END \
MPACK_WSHADOW_WARNING_END \
MPACK_EXTERN_C_END
MPACK_HEADER_START
/* Miscellaneous helper macros */
#define MPACK_UNUSED(var) ((void)(var))
#define MPACK_STRINGIFY_IMPL(arg) #arg
#define MPACK_STRINGIFY(arg) MPACK_STRINGIFY_IMPL(arg)
// This is a workaround for MSVC's incorrect expansion of __VA_ARGS__. It
// treats __VA_ARGS__ as a single preprocessor token when passed in the
// argument list of another macro unless we use an outer wrapper to expand it
// lexically first. (For safety/consistency we use this in all variadic macros
// that don't ignore the variadic arguments regardless of whether __VA_ARGS__
// is passed to another macro.)
// https://stackoverflow.com/a/32400131
#define MPACK_EXPAND(x) x
// Extracts the first argument of a variadic macro list, where there might only
// be one argument.
#define MPACK_EXTRACT_ARG0_IMPL(first, ...) first
#define MPACK_EXTRACT_ARG0(...) MPACK_EXPAND(MPACK_EXTRACT_ARG0_IMPL( __VA_ARGS__ , ignored))
// Stringifies the first argument of a variadic macro list, where there might
// only be one argument.
#define MPACK_STRINGIFY_ARG0_impl(first, ...) #first
#define MPACK_STRINGIFY_ARG0(...) MPACK_EXPAND(MPACK_STRINGIFY_ARG0_impl( __VA_ARGS__ , ignored))
/*
* Definition of inline macros.
*
* MPack does not use static inline in header files; only one non-inline definition
* of each function should exist in the final build. This can reduce the binary size
* in cases where the compiler cannot or chooses not to inline a function.
* The addresses of functions should also compare equal across translation units
* regardless of whether they are declared inline.
*
* The above requirements mean that the declaration and definition of non-trivial
* inline functions must be separated so that the definitions will only
* appear when necessary. In addition, three different linkage models need
* to be supported:
*
* - The C99 model, where a standalone function is emitted only if there is any
* `extern inline` or non-`inline` declaration (including the definition itself)
*
* - The GNU model, where an `inline` definition emits a standalone function and an
* `extern inline` definition does not, regardless of other declarations
*
* - The C++ model, where `inline` emits a standalone function with special
* (COMDAT) linkage
*
* The macros below wrap up everything above. All inline functions defined in header
* files have a single non-inline definition emitted in the compilation of
* mpack-platform.c. All inline declarations and definitions use the same MPACK_INLINE
* specification to simplify the rules on when standalone functions are emitted.
* Inline functions in source files are defined MPACK_STATIC_INLINE.
*
* Additional reading:
* http://www.greenend.org.uk/rjk/tech/inline.html
*/
#if defined(__cplusplus)
// C++ rules
// The linker will need COMDAT support to link C++ object files,
// so we don't need to worry about emitting definitions from C++
// translation units. If mpack-platform.c (or the amalgamation)
// is compiled as C, its definition will be used, otherwise a
// C++ definition will be used, and no other C files will emit
// a defition.
#define MPACK_INLINE inline
#elif defined(_MSC_VER)
// MSVC 2013 always uses COMDAT linkage, but it doesn't treat 'inline' as a
// keyword in C99 mode. (This appears to be fixed in a later version of
// MSVC but we don't bother detecting it.)
#define MPACK_INLINE __inline
#define MPACK_STATIC_INLINE static __inline
#elif defined(__GNUC__) && (defined(__GNUC_GNU_INLINE__) || \
!defined(__GNUC_STDC_INLINE__) && !defined(__GNUC_GNU_INLINE__))
// GNU rules
#if MPACK_EMIT_INLINE_DEFS
#define MPACK_INLINE inline
#else
#define MPACK_INLINE extern inline
#endif
#else
// C99 rules
#if MPACK_EMIT_INLINE_DEFS
#define MPACK_INLINE extern inline
#else
#define MPACK_INLINE inline
#endif
#endif
#ifndef MPACK_STATIC_INLINE
#define MPACK_STATIC_INLINE static inline
#endif
#ifdef MPACK_OPTIMIZE_FOR_SPEED
#error "You should define MPACK_OPTIMIZE_FOR_SIZE, not MPACK_OPTIMIZE_FOR_SPEED."
#endif
/*
* Prevent inlining
*
* When a function is only used once, it is almost always inlined
* automatically. This can cause poor instruction cache usage because a
* function that should rarely be called (such as buffer exhaustion handling)
* will get inlined into the middle of a hot code path.
*/
#if !MPACK_NO_BUILTINS
#if defined(_MSC_VER)
#define MPACK_NOINLINE __declspec(noinline)
#elif defined(__GNUC__) || defined(__clang__)
#define MPACK_NOINLINE __attribute__((noinline))
#endif
#endif
#ifndef MPACK_NOINLINE
#define MPACK_NOINLINE /* nothing */
#endif
/* Some compiler-specific keywords and builtins */
#if !MPACK_NO_BUILTINS
#if defined(__GNUC__) || defined(__clang__)
#define MPACK_UNREACHABLE __builtin_unreachable()
#define MPACK_NORETURN(fn) fn __attribute__((noreturn))
#define MPACK_RESTRICT __restrict__
#elif defined(_MSC_VER)
#define MPACK_UNREACHABLE __assume(0)
#define MPACK_NORETURN(fn) __declspec(noreturn) fn
#define MPACK_RESTRICT __restrict
#endif
#endif
#ifndef MPACK_RESTRICT
#ifdef __cplusplus
#define MPACK_RESTRICT /* nothing, unavailable in C++ */
#else
#define MPACK_RESTRICT restrict /* required in C99 */
#endif
#endif
#ifndef MPACK_UNREACHABLE
#define MPACK_UNREACHABLE ((void)0)
#endif
#ifndef MPACK_NORETURN
#define MPACK_NORETURN(fn) fn
#endif
/*
* Likely/unlikely
*
* These should only really be used when a branch is taken (or not taken) less
* than 1/1000th of the time. Buffer flush checks when writing very small
* elements are a good example.
*/
#if !MPACK_NO_BUILTINS
#if defined(__GNUC__) || defined(__clang__)
#ifndef MPACK_LIKELY
#define MPACK_LIKELY(x) __builtin_expect((x),1)
#endif
#ifndef MPACK_UNLIKELY
#define MPACK_UNLIKELY(x) __builtin_expect((x),0)
#endif
#endif
#endif
#ifndef MPACK_LIKELY
#define MPACK_LIKELY(x) (x)
#endif
#ifndef MPACK_UNLIKELY
#define MPACK_UNLIKELY(x) (x)
#endif
/* Static assert */
#ifndef MPACK_STATIC_ASSERT
#if defined(__cplusplus)
#if __cplusplus >= 201103L
#define MPACK_STATIC_ASSERT static_assert
#endif
#elif defined(__STDC_VERSION__)
#if __STDC_VERSION__ >= 201112L
#define MPACK_STATIC_ASSERT _Static_assert
#endif
#endif
#endif
#if !MPACK_NO_BUILTINS
#ifndef MPACK_STATIC_ASSERT
#if defined(__has_feature)
#if __has_feature(cxx_static_assert)
#define MPACK_STATIC_ASSERT static_assert
#elif __has_feature(c_static_assert)
#define MPACK_STATIC_ASSERT _Static_assert
#endif
#endif
#endif
#ifndef MPACK_STATIC_ASSERT
#if defined(__GNUC__)
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#ifndef __cplusplus
#if __GNUC__ >= 5
#define MPACK_IGNORE_PEDANTIC "GCC diagnostic ignored \"-Wpedantic\""
#else
#define MPACK_IGNORE_PEDANTIC "GCC diagnostic ignored \"-pedantic\""
#endif
#define MPACK_STATIC_ASSERT(expr, str) do { \
_Pragma ("GCC diagnostic push") \
_Pragma (MPACK_IGNORE_PEDANTIC) \
_Pragma ("GCC diagnostic ignored \"-Wc++-compat\"") \
_Static_assert(expr, str); \
_Pragma ("GCC diagnostic pop") \
} while (0)
#endif
#endif
#endif
#endif
#ifndef MPACK_STATIC_ASSERT
#ifdef _MSC_VER
#if _MSC_VER >= 1600
#define MPACK_STATIC_ASSERT static_assert
#endif
#endif
#endif
#endif
#ifndef MPACK_STATIC_ASSERT
#define MPACK_STATIC_ASSERT(expr, str) (MPACK_UNUSED(sizeof(char[1 - 2*!(expr)])))
#endif
/* _Generic */
#ifndef MPACK_HAS_GENERIC
#if defined(__clang__) && defined(__has_feature)
// With Clang we can test for _Generic support directly
// and ignore C/C++ version
#if __has_feature(c_generic_selections)
#define MPACK_HAS_GENERIC 1
#else
#define MPACK_HAS_GENERIC 0
#endif
#endif
#endif
#ifndef MPACK_HAS_GENERIC
#if defined(__STDC_VERSION__)
#if __STDC_VERSION__ >= 201112L
#if defined(__GNUC__) && !defined(__clang__)
// GCC does not have full C11 support in GCC 4.7 and 4.8
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)
#define MPACK_HAS_GENERIC 1
#endif
#else
// We hope other compilers aren't lying about C11/_Generic support
#define MPACK_HAS_GENERIC 1
#endif
#endif
#endif
#endif
#ifndef MPACK_HAS_GENERIC
#define MPACK_HAS_GENERIC 0
#endif
/*
* Finite Math
*
* -ffinite-math-only, included in -ffast-math, breaks functions that
* that check for non-finite real values such as isnan() and isinf().
*
* We should use this to trap errors when reading data that contains
* non-finite reals. This isn't currently implemented.
*/
#ifndef MPACK_FINITE_MATH
#if defined(__FINITE_MATH_ONLY__) && __FINITE_MATH_ONLY__
#define MPACK_FINITE_MATH 1
#endif
#endif
#ifndef MPACK_FINITE_MATH
#define MPACK_FINITE_MATH 0
#endif
/*
* Endianness checks
*
* These define MPACK_NHSWAP*() which swap network<->host byte
* order when needed.
*
* We leave them undefined if we can't determine the endianness
* at compile-time, in which case we fall back to bit-shifts.
*
* See the notes in mpack-common.h.
*/
#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__)
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define MPACK_NHSWAP16(x) (x)
#define MPACK_NHSWAP32(x) (x)
#define MPACK_NHSWAP64(x) (x)
#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#if !MPACK_NO_BUILTINS
#if defined(__clang__)
#ifdef __has_builtin
// Unlike the GCC builtins, the bswap builtins in Clang
// significantly improve ARM performance.
#if __has_builtin(__builtin_bswap16)
#define MPACK_NHSWAP16(x) __builtin_bswap16(x)
#endif
#if __has_builtin(__builtin_bswap32)
#define MPACK_NHSWAP32(x) __builtin_bswap32(x)
#endif
#if __has_builtin(__builtin_bswap64)
#define MPACK_NHSWAP64(x) __builtin_bswap64(x)
#endif
#endif
#elif defined(__GNUC__)
// The GCC bswap builtins are apparently poorly optimized on older
// versions of GCC, so we set a minimum version here just in case.
// http://hardwarebug.org/2010/01/14/beware-the-builtins/
#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
#define MPACK_NHSWAP64(x) __builtin_bswap64(x)
#endif
// __builtin_bswap16() was not implemented on all platforms
// until GCC 4.8.0:
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
//
// The 16- and 32-bit versions in GCC significantly reduce performance
// on ARM with little effect on code size so we don't use them.
#endif
#endif
#endif
#elif defined(_MSC_VER) && defined(_WIN32) && !MPACK_NO_BUILTINS
// On Windows, we assume x86 and x86_64 are always little-endian.
// We make no assumptions about ARM even though all current
// Windows Phone devices are little-endian in case Microsoft's
// compiler is ever used with a big-endian ARM device.
#if defined(_M_IX86) || defined(_M_X64) || defined(_M_AMD64)
#define MPACK_NHSWAP16(x) _byteswap_ushort(x)
#define MPACK_NHSWAP32(x) _byteswap_ulong(x)
#define MPACK_NHSWAP64(x) _byteswap_uint64(x)
#endif
#endif
#if defined(__FLOAT_WORD_ORDER__) && defined(__BYTE_ORDER__)
// We check where possible that the float byte order matches the
// integer byte order. This is extremely unlikely to fail, but
// we check anyway just in case.
//
// (The static assert is placed in float/double encoders instead
// of here because our static assert fallback doesn't work at
// file scope)
#define MPACK_CHECK_FLOAT_ORDER() \
MPACK_STATIC_ASSERT(__FLOAT_WORD_ORDER__ == __BYTE_ORDER__, \
"float byte order does not match int byte order! float/double " \
"encoding is not properly implemented on this platform.")
#endif
#ifndef MPACK_CHECK_FLOAT_ORDER
#define MPACK_CHECK_FLOAT_ORDER() /* nothing */
#endif
/*
* Here we define mpack_assert() and mpack_break(). They both work like a normal
* assertion function in debug mode, causing a trap or abort. However, on some platforms
* you can safely resume execution from mpack_break(), whereas mpack_assert() is
* always fatal.
*
* In release mode, mpack_assert() is converted to an assurance to the compiler
* that the expression cannot be false (via e.g. __assume() or __builtin_unreachable())
* to improve optimization where supported. There is thus no point in "safely" handling
* the case of this being false. Writing mpack_assert(0) rarely makes sense (except
* possibly as a default handler in a switch) since the compiler will throw away any
* code after it. If at any time an mpack_assert() is not true, the behaviour is
* undefined. This also means the expression is evaluated even in release.
*
* mpack_break() on the other hand is compiled to nothing in release. It is
* used in situations where we want to highlight a programming error as early as
* possible (in the debugger), but we still handle the situation safely if it
* happens in release to avoid producing incorrect results (such as in
* MPACK_WRITE_TRACKING.) It does not take an expression to test because it
* belongs in a safe-handling block after its failing condition has been tested.
*
* If stdio is available, we can add a format string describing the error, and
* on some compilers we can declare it noreturn to get correct results from static
* analysis tools. Note that the format string and arguments are not evaluated unless
* the assertion is hit.
*
* Note that any arguments to mpack_assert() beyond the first are only evaluated
* if the expression is false (and are never evaluated in release.)
*
* mpack_assert_fail() and mpack_break_hit() are defined separately
* because assert is noreturn and break isn't. This distinction is very
* important for static analysis tools to give correct results.
*/
#if MPACK_DEBUG
/**
* @addtogroup config
* @{
*/
/**
* @name Debug Functions
*/
/**
* Implement this and define @ref MPACK_CUSTOM_ASSERT to use a custom
* assertion function.
*
* This function should not return. If it does, MPack will @c abort().
*
* If you use C++, make sure you include @c mpack.h where you define
* this to get the correct linkage (or define it <code>extern "C"</code>.)
*
* Asserts are only used when @ref MPACK_DEBUG is enabled, and can be
* triggered by bugs in MPack or bugs due to incorrect usage of MPack.
*/
void mpack_assert_fail(const char* message);
/**
* @}
*/
/**
* @}
*/
MPACK_NORETURN(void mpack_assert_fail_wrapper(const char* message));
#if MPACK_STDIO
MPACK_NORETURN(void mpack_assert_fail_format(const char* format, ...));
#define mpack_assert_fail_at(line, file, exprstr, format, ...) \
MPACK_EXPAND(mpack_assert_fail_format("mpack assertion failed at " file ":" #line "\n%s\n" format, exprstr, __VA_ARGS__))
#else
#define mpack_assert_fail_at(line, file, exprstr, format, ...) \
mpack_assert_fail_wrapper("mpack assertion failed at " file ":" #line "\n" exprstr "\n")
#endif
#define mpack_assert_fail_pos(line, file, exprstr, expr, ...) \
MPACK_EXPAND(mpack_assert_fail_at(line, file, exprstr, __VA_ARGS__))
// This contains a workaround to the pedantic C99 requirement of having at
// least one argument to a variadic macro. The first argument is the
// boolean expression, the optional second argument (if provided) must be a
// literal format string, and any additional arguments are the format
// argument list.
//
// Unfortunately this means macros are expanded in the expression before it
// gets stringified. I haven't found a workaround to this.
//
// This adds two unused arguments to the format argument list when a
// format string is provided, so this would complicate the use of
// -Wformat and __attribute__((format)) on mpack_assert_fail_format() if we
// ever bothered to implement it.
#define mpack_assert(...) \
MPACK_EXPAND(((!(MPACK_EXTRACT_ARG0(__VA_ARGS__))) ? \
mpack_assert_fail_pos(__LINE__, __FILE__, MPACK_STRINGIFY_ARG0(__VA_ARGS__) , __VA_ARGS__ , "", NULL) : \
(void)0))
void mpack_break_hit(const char* message);
#if MPACK_STDIO
void mpack_break_hit_format(const char* format, ...);
#define mpack_break_hit_at(line, file, ...) \
MPACK_EXPAND(mpack_break_hit_format("mpack breakpoint hit at " file ":" #line "\n" __VA_ARGS__))
#else
#define mpack_break_hit_at(line, file, ...) \
mpack_break_hit("mpack breakpoint hit at " file ":" #line )
#endif
#define mpack_break_hit_pos(line, file, ...) MPACK_EXPAND(mpack_break_hit_at(line, file, __VA_ARGS__))
#define mpack_break(...) MPACK_EXPAND(mpack_break_hit_pos(__LINE__, __FILE__, __VA_ARGS__))
#else
#define mpack_assert(...) \
(MPACK_EXPAND((!(MPACK_EXTRACT_ARG0(__VA_ARGS__))) ? \
(MPACK_UNREACHABLE, (void)0) : \
(void)0))
#define mpack_break(...) ((void)0)
#endif
/* Wrap some needed libc functions */
#if MPACK_STDLIB
#define mpack_memcmp memcmp
#define mpack_memcpy memcpy
#define mpack_memmove memmove
#define mpack_memset memset
#ifndef mpack_strlen
#define mpack_strlen strlen
#endif
#if defined(MPACK_UNIT_TESTS) && MPACK_INTERNAL && defined(__GNUC__)
// make sure we don't use the stdlib directly during development
#undef memcmp
#undef memcpy
#undef memmove
#undef memset
#undef strlen
#undef malloc
#undef free
#pragma GCC poison memcmp
#pragma GCC poison memcpy
#pragma GCC poison memmove
#pragma GCC poison memset
#pragma GCC poison strlen
#pragma GCC poison malloc
#pragma GCC poison free
#endif
#elif defined(__GNUC__) && !MPACK_NO_BUILTINS
// there's not always a builtin memmove for GCC,
// and we don't have a way to test for it
#define mpack_memcmp __builtin_memcmp
#define mpack_memcpy __builtin_memcpy
#define mpack_memset __builtin_memset
#define mpack_strlen __builtin_strlen
#elif defined(__clang__) && defined(__has_builtin) && !MPACK_NO_BUILTINS
#if __has_builtin(__builtin_memcmp)
#define mpack_memcmp __builtin_memcmp
#endif
#if __has_builtin(__builtin_memcpy)
#define mpack_memcpy __builtin_memcpy
#endif
#if __has_builtin(__builtin_memmove)
#define mpack_memmove __builtin_memmove
#endif
#if __has_builtin(__builtin_memset)
#define mpack_memset __builtin_memset
#endif
#if __has_builtin(__builtin_strlen)
#define mpack_strlen __builtin_strlen
#endif
#endif
#ifndef mpack_memcmp
int mpack_memcmp(const void* s1, const void* s2, size_t n);
#endif
#ifndef mpack_memcpy
void* mpack_memcpy(void* MPACK_RESTRICT s1, const void* MPACK_RESTRICT s2, size_t n);
#endif
#ifndef mpack_memmove
void* mpack_memmove(void* s1, const void* s2, size_t n);
#endif
#ifndef mpack_memset
void* mpack_memset(void* s, int c, size_t n);
#endif
#ifndef mpack_strlen
size_t mpack_strlen(const char* s);
#endif
#if MPACK_STDIO
#if defined(WIN32)
#define mpack_snprintf _snprintf
#else
#define mpack_snprintf snprintf
#endif
#endif
/* Debug logging */
#if 0
#include <stdio.h>
#define mpack_log(...) (MPACK_EXPAND(printf(__VA_ARGS__), fflush(stdout)))
#else
#define mpack_log(...) ((void)0)
#endif
/* Make sure our configuration makes sense */
#if defined(MPACK_MALLOC) && !defined(MPACK_FREE)
#error "MPACK_MALLOC requires MPACK_FREE."
#endif
#if !defined(MPACK_MALLOC) && defined(MPACK_FREE)
#error "MPACK_FREE requires MPACK_MALLOC."
#endif
#if MPACK_READ_TRACKING && !defined(MPACK_READER)
#error "MPACK_READ_TRACKING requires MPACK_READER."
#endif
#if MPACK_WRITE_TRACKING && !defined(MPACK_WRITER)
#error "MPACK_WRITE_TRACKING requires MPACK_WRITER."
#endif
#ifndef MPACK_MALLOC
#if MPACK_STDIO
#error "MPACK_STDIO requires preprocessor definitions for MPACK_MALLOC and MPACK_FREE."
#endif
#if MPACK_READ_TRACKING
#error "MPACK_READ_TRACKING requires preprocessor definitions for MPACK_MALLOC and MPACK_FREE."
#endif
#if MPACK_WRITE_TRACKING
#error "MPACK_WRITE_TRACKING requires preprocessor definitions for MPACK_MALLOC and MPACK_FREE."
#endif
#endif
/* Implement realloc if unavailable */
#ifdef MPACK_MALLOC
#ifdef MPACK_REALLOC
MPACK_INLINE void* mpack_realloc(void* old_ptr, size_t used_size, size_t new_size) {
MPACK_UNUSED(used_size);
return MPACK_REALLOC(old_ptr, new_size);
}
#else
void* mpack_realloc(void* old_ptr, size_t used_size, size_t new_size);
#endif
#endif
/**
* @}
*/
MPACK_HEADER_END
#endif
/* mpack/mpack-common.h.h */
/**
* @file
*
* Defines types and functions shared by the MPack reader and writer.
*/
#ifndef MPACK_COMMON_H
#define MPACK_COMMON_H 1
/* #include "mpack-platform.h" */
#ifndef MPACK_PRINT_BYTE_COUNT
#define MPACK_PRINT_BYTE_COUNT 12
#endif
MPACK_HEADER_START
/**
* @defgroup common Tags and Common Elements
*
* Contains types, constants and functions shared by both the encoding
* and decoding portions of MPack.
*
* @{
*/
/* Version information */
#define MPACK_VERSION_MAJOR 1 /**< The major version number of MPack. */
#define MPACK_VERSION_MINOR 0 /**< The minor version number of MPack. */
#define MPACK_VERSION_PATCH 0 /**< The patch version number of MPack. */
/** A number containing the version number of MPack for comparison purposes. */
#define MPACK_VERSION ((MPACK_VERSION_MAJOR * 10000) + \
(MPACK_VERSION_MINOR * 100) + MPACK_VERSION_PATCH)
/** A macro to test for a minimum version of MPack. */
#define MPACK_VERSION_AT_LEAST(major, minor, patch) \
(MPACK_VERSION >= (((major) * 10000) + ((minor) * 100) + (patch)))
/** @cond */
#if (MPACK_VERSION_PATCH > 0)
#define MPACK_VERSION_STRING_BASE \
MPACK_STRINGIFY(MPACK_VERSION_MAJOR) "." \
MPACK_STRINGIFY(MPACK_VERSION_MINOR) "." \
MPACK_STRINGIFY(MPACK_VERSION_PATCH)
#else
#define MPACK_VERSION_STRING_BASE \
MPACK_STRINGIFY(MPACK_VERSION_MAJOR) "." \
MPACK_STRINGIFY(MPACK_VERSION_MINOR)
#endif
/** @endcond */
/**
* @def MPACK_VERSION_STRING
* @hideinitializer
*
* A string containing the MPack version.
*/
#if MPACK_RELEASE_VERSION
#define MPACK_VERSION_STRING MPACK_VERSION_STRING_BASE
#else
#define MPACK_VERSION_STRING MPACK_VERSION_STRING_BASE "dev"
#endif
/**
* @def MPACK_LIBRARY_STRING
* @hideinitializer
*
* A string describing MPack, containing the library name, version and debug mode.
*/
#if MPACK_DEBUG
#define MPACK_LIBRARY_STRING "MPack " MPACK_VERSION_STRING "-debug"
#else
#define MPACK_LIBRARY_STRING "MPack " MPACK_VERSION_STRING
#endif
/** @cond */
/**
* @def MPACK_MAXIMUM_TAG_SIZE
*
* The maximum encoded size of a tag in bytes.
*/
#define MPACK_MAXIMUM_TAG_SIZE 9
/** @endcond */
#if MPACK_EXTENSIONS
/**
* @def MPACK_TIMESTAMP_NANOSECONDS_MAX
*
* The maximum value of nanoseconds for a timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
#define MPACK_TIMESTAMP_NANOSECONDS_MAX 999999999
#endif
#if MPACK_COMPATIBILITY
/**
* Versions of the MessagePack format.
*
* A reader, writer, or tree can be configured to serialize in an older
* version of the MessagePack spec. This is necessary to interface with
* older MessagePack libraries that do not support new MessagePack features.
*
* @note This requires @ref MPACK_COMPATIBILITY.
*/
typedef enum mpack_version_t {
/**
* Version 1.0/v4, supporting only the @c raw type without @c str8.
*/
mpack_version_v4 = 4,
/**
* Version 2.0/v5, supporting the @c str8, @c bin and @c ext types.
*/
mpack_version_v5 = 5,
/**
* The most recent supported version of MessagePack. This is the default.
*/
mpack_version_current = mpack_version_v5,
} mpack_version_t;
#endif
/**
* Error states for MPack objects.
*
* When a reader, writer, or tree is in an error state, all subsequent calls
* are ignored and their return values are nil/zero. You should check whether
* the source is in an error state before using such values.
*/
typedef enum mpack_error_t {
mpack_ok = 0, /**< No error. */
mpack_error_io = 2, /**< The reader or writer failed to fill or flush, or some other file or socket error occurred. */
mpack_error_invalid, /**< The data read is not valid MessagePack. */
mpack_error_unsupported, /**< The data read is not supported by this configuration of MPack. (See @ref MPACK_EXTENSIONS.) */
mpack_error_type, /**< The type or value range did not match what was expected by the caller. */
mpack_error_too_big, /**< A read or write was bigger than the maximum size allowed for that operation. */
mpack_error_memory, /**< An allocation failure occurred. */
mpack_error_bug, /**< The MPack API was used incorrectly. (This will always assert in debug mode.) */
mpack_error_data, /**< The contained data is not valid. */
mpack_error_eof, /**< The reader failed to read because of file or socket EOF */
} mpack_error_t;
/**
* Converts an MPack error to a string. This function returns an empty
* string when MPACK_DEBUG is not set.
*/
const char* mpack_error_to_string(mpack_error_t error);
/**
* Defines the type of a MessagePack tag.
*
* Note that extension types, both user defined and built-in, are represented
* in tags as @ref mpack_type_ext. The value for an extension type is stored
* separately.
*/
typedef enum mpack_type_t {
mpack_type_missing = 0, /**< Special type indicating a missing optional value. */
mpack_type_nil, /**< A null value. */
mpack_type_bool, /**< A boolean (true or false.) */
mpack_type_int, /**< A 64-bit signed integer. */
mpack_type_uint, /**< A 64-bit unsigned integer. */
mpack_type_float, /**< A 32-bit IEEE 754 floating point number. */
mpack_type_double, /**< A 64-bit IEEE 754 floating point number. */
mpack_type_str, /**< A string. */
mpack_type_bin, /**< A chunk of binary data. */
mpack_type_array, /**< An array of MessagePack objects. */
mpack_type_map, /**< An ordered map of key/value pairs of MessagePack objects. */
#if MPACK_EXTENSIONS
/**
* A typed MessagePack extension object containing a chunk of binary data.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
mpack_type_ext,
#endif
} mpack_type_t;
/**
* Converts an MPack type to a string. This function returns an empty
* string when MPACK_DEBUG is not set.
*/
const char* mpack_type_to_string(mpack_type_t type);
#if MPACK_EXTENSIONS
/**
* A timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
typedef struct mpack_timestamp_t {
int64_t seconds; /*< The number of seconds (signed) since 1970-01-01T00:00:00Z. */
uint32_t nanoseconds; /*< The number of additional nanoseconds, between 0 and 999,999,999. */
} mpack_timestamp_t;
#endif
/**
* An MPack tag is a MessagePack object header. It is a variant type
* representing any kind of object, and includes the length of compound types
* (e.g. map, array, string) or the value of non-compound types (e.g. boolean,
* integer, float.)
*
* If the type is compound (str, bin, ext, array or map), the contained
* elements or bytes are stored separately.
*
* This structure is opaque; its fields should not be accessed outside
* of MPack.
*/
typedef struct mpack_tag_t mpack_tag_t;
/* Hide internals from documentation */
/** @cond */
struct mpack_tag_t {
mpack_type_t type; /*< The type of value. */
#if MPACK_EXTENSIONS
int8_t exttype; /*< The extension type if the type is @ref mpack_type_ext. */
#endif
/* The value for non-compound types. */
union {
uint64_t u; /*< The value if the type is unsigned int. */
int64_t i; /*< The value if the type is signed int. */
double d; /*< The value if the type is double. */
float f; /*< The value if the type is float. */
bool b; /*< The value if the type is bool. */
/* The number of bytes if the type is str, bin or ext. */
uint32_t l;
/* The element count if the type is an array, or the number of
key/value pairs if the type is map. */
uint32_t n;
} v;
};
/** @endcond */
/**
* @name Tag Generators
* @{
*/
/**
* @def MPACK_TAG_ZERO
*
* An @ref mpack_tag_t initializer that zeroes the given tag.
*
* @warning This does not make the tag nil! The tag's type is invalid when
* initialized this way. Use @ref mpack_tag_make_nil() to generate a nil tag.
*/
#if MPACK_EXTENSIONS
#define MPACK_TAG_ZERO {(mpack_type_t)0, 0, {0}}
#else
#define MPACK_TAG_ZERO {(mpack_type_t)0, {0}}
#endif
/** Generates a nil tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_nil(void) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_nil;
return ret;
}
/** Generates a bool tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_bool(bool value) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_bool;
ret.v.b = value;
return ret;
}
/** Generates a bool tag with value true. */
MPACK_INLINE mpack_tag_t mpack_tag_make_true(void) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_bool;
ret.v.b = true;
return ret;
}
/** Generates a bool tag with value false. */
MPACK_INLINE mpack_tag_t mpack_tag_make_false(void) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_bool;
ret.v.b = false;
return ret;
}
/** Generates a signed int tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_int(int64_t value) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_int;
ret.v.i = value;
return ret;
}
/** Generates an unsigned int tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_uint(uint64_t value) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_uint;
ret.v.u = value;
return ret;
}
/** Generates a float tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_float(float value) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_float;
ret.v.f = value;
return ret;
}
/** Generates a double tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_double(double value) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_double;
ret.v.d = value;
return ret;
}
/** Generates an array tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_array(uint32_t count) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_array;
ret.v.n = count;
return ret;
}
/** Generates a map tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_map(uint32_t count) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_map;
ret.v.n = count;
return ret;
}
/** Generates a str tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_str(uint32_t length) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_str;
ret.v.l = length;
return ret;
}
/** Generates a bin tag. */
MPACK_INLINE mpack_tag_t mpack_tag_make_bin(uint32_t length) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_bin;
ret.v.l = length;
return ret;
}
#if MPACK_EXTENSIONS
/**
* Generates an ext tag.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
MPACK_INLINE mpack_tag_t mpack_tag_make_ext(int8_t exttype, uint32_t length) {
mpack_tag_t ret = MPACK_TAG_ZERO;
ret.type = mpack_type_ext;
ret.exttype = exttype;
ret.v.l = length;
return ret;
}
#endif
/**
* @}
*/
/**
* @name Tag Querying Functions
* @{
*/
/**
* Gets the type of a tag.
*/
MPACK_INLINE mpack_type_t mpack_tag_type(mpack_tag_t* tag) {
return tag->type;
}
/**
* Gets the boolean value of a bool-type tag. The tag must be of type @ref
* mpack_type_bool.
*
* This asserts that the type in the tag is @ref mpack_type_bool. (No check is
* performed if MPACK_DEBUG is not set.)
*/
MPACK_INLINE bool mpack_tag_bool_value(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_bool, "tag is not a bool!");
return tag->v.b;
}
/**
* Gets the signed integer value of an int-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_int. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @warning This does not convert between signed and unsigned tags! A positive
* integer may be stored in a tag as either @ref mpack_type_int or @ref
* mpack_type_uint. You must check the type first; this can only be used if the
* type is @ref mpack_type_int.
*
* @see mpack_type_int
*/
MPACK_INLINE int64_t mpack_tag_int_value(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_int, "tag is not an int!");
return tag->v.i;
}
/**
* Gets the unsigned integer value of a uint-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_uint. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @warning This does not convert between signed and unsigned tags! A positive
* integer may be stored in a tag as either @ref mpack_type_int or @ref
* mpack_type_uint. You must check the type first; this can only be used if the
* type is @ref mpack_type_uint.
*
* @see mpack_type_uint
*/
MPACK_INLINE uint64_t mpack_tag_uint_value(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_uint, "tag is not a uint!");
return tag->v.u;
}
/**
* Gets the float value of a float-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_float. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @warning This does not convert between float and double tags! This can only
* be used if the type is @ref mpack_type_float.
*
* @see mpack_type_float
*/
MPACK_INLINE float mpack_tag_float_value(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_float, "tag is not a float!");
return tag->v.f;
}
/**
* Gets the double value of a double-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_double. (No check
* is performed if MPACK_DEBUG is not set.)
*
* @warning This does not convert between float and double tags! This can only
* be used if the type is @ref mpack_type_double.
*
* @see mpack_type_double
*/
MPACK_INLINE double mpack_tag_double_value(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_double, "tag is not a double!");
return tag->v.d;
}
/**
* Gets the number of elements in an array tag.
*
* This asserts that the type in the tag is @ref mpack_type_array. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @see mpack_type_array
*/
MPACK_INLINE uint32_t mpack_tag_array_count(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_array, "tag is not an array!");
return tag->v.n;
}
/**
* Gets the number of key-value pairs in a map tag.
*
* This asserts that the type in the tag is @ref mpack_type_map. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @see mpack_type_map
*/
MPACK_INLINE uint32_t mpack_tag_map_count(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_map, "tag is not a map!");
return tag->v.n;
}
/**
* Gets the length in bytes of a str-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_str. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @see mpack_type_str
*/
MPACK_INLINE uint32_t mpack_tag_str_length(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_str, "tag is not a str!");
return tag->v.l;
}
/**
* Gets the length in bytes of a bin-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_bin. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @see mpack_type_bin
*/
MPACK_INLINE uint32_t mpack_tag_bin_length(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_bin, "tag is not a bin!");
return tag->v.l;
}
#if MPACK_EXTENSIONS
/**
* Gets the length in bytes of an ext-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_ext. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @see mpack_type_ext
*/
MPACK_INLINE uint32_t mpack_tag_ext_length(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_ext, "tag is not an ext!");
return tag->v.l;
}
/**
* Gets the extension type (exttype) of an ext-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_ext. (No check is
* performed if MPACK_DEBUG is not set.)
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @see mpack_type_ext
*/
MPACK_INLINE int8_t mpack_tag_ext_exttype(mpack_tag_t* tag) {
mpack_assert(tag->type == mpack_type_ext, "tag is not an ext!");
return tag->exttype;
}
#endif
/**
* Gets the length in bytes of a str-, bin- or ext-type tag.
*
* This asserts that the type in the tag is @ref mpack_type_str, @ref
* mpack_type_bin or @ref mpack_type_ext. (No check is performed if MPACK_DEBUG
* is not set.)
*
* @see mpack_type_str
* @see mpack_type_bin
* @see mpack_type_ext
*/
MPACK_INLINE uint32_t mpack_tag_bytes(mpack_tag_t* tag) {
#if MPACK_EXTENSIONS
mpack_assert(tag->type == mpack_type_str || tag->type == mpack_type_bin
|| tag->type == mpack_type_ext, "tag is not a str, bin or ext!");
#else
mpack_assert(tag->type == mpack_type_str || tag->type == mpack_type_bin,
"tag is not a str or bin!");
#endif
return tag->v.l;
}
/**
* @}
*/
/**
* @name Other tag functions
* @{
*/
#if MPACK_EXTENSIONS
/**
* The extension type for a timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
#define MPACK_EXTTYPE_TIMESTAMP ((int8_t)(-1))
#endif
/**
* Compares two tags with an arbitrary fixed ordering. Returns 0 if the tags are
* equal, a negative integer if left comes before right, or a positive integer
* otherwise.
*
* \warning The ordering is not guaranteed to be preserved across MPack versions; do
* not rely on it in persistent data.
*
* \warning Floating point numbers are compared bit-for-bit, not using the language's
* operator==. This means that NaNs with matching representation will compare equal.
* This behaviour is up for debate; see comments in the definition of mpack_tag_cmp().
*
* See mpack_tag_equal() for more information on when tags are considered equal.
*/
int mpack_tag_cmp(mpack_tag_t left, mpack_tag_t right);
/**
* Compares two tags for equality. Tags are considered equal if the types are compatible
* and the values (for non-compound types) are equal.
*
* The field width of variable-width fields is ignored (and in fact is not stored
* in a tag), and positive numbers in signed integers are considered equal to their
* unsigned counterparts. So for example the value 1 stored as a positive fixint
* is equal to the value 1 stored in a 64-bit unsigned integer field.
*
* The "extension type" of an extension object is considered part of the value
* and must match exactly.
*
* \warning Floating point numbers are compared bit-for-bit, not using the language's
* operator==. This means that NaNs with matching representation will compare equal.
* This behaviour is up for debate; see comments in the definition of mpack_tag_cmp().
*/
MPACK_INLINE bool mpack_tag_equal(mpack_tag_t left, mpack_tag_t right) {
return mpack_tag_cmp(left, right) == 0;
}
#if MPACK_DEBUG && MPACK_STDIO
/**
* Generates a json-like debug description of the given tag into the given buffer.
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*
* The prefix is used to print the first few hexadecimal bytes of a bin or ext
* type. Pass NULL if not a bin or ext.
*/
void mpack_tag_debug_pseudo_json(mpack_tag_t tag, char* buffer, size_t buffer_size,
const char* prefix, size_t prefix_size);
/**
* Generates a debug string description of the given tag into the given buffer.
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
void mpack_tag_debug_describe(mpack_tag_t tag, char* buffer, size_t buffer_size);
/** @cond */
/*
* A callback function for printing pseudo-JSON for debugging purposes.
*
* @see mpack_node_print_callback
*/
typedef void (*mpack_print_callback_t)(void* context, const char* data, size_t count);
// helpers for printing debug output
// i feel a bit like i'm re-implementing a buffered writer again...
typedef struct mpack_print_t {
char* buffer;
size_t size;
size_t count;
mpack_print_callback_t callback;
void* context;
} mpack_print_t;
void mpack_print_append(mpack_print_t* print, const char* data, size_t count);
MPACK_INLINE void mpack_print_append_cstr(mpack_print_t* print, const char* cstr) {
mpack_print_append(print, cstr, mpack_strlen(cstr));
}
void mpack_print_flush(mpack_print_t* print);
void mpack_print_file_callback(void* context, const char* data, size_t count);
/** @endcond */
#endif
/**
* @}
*/
/**
* @name Deprecated Tag Generators
* @{
*/
/*
* "make" has been added to their names to disambiguate them from the
* value-fetching functions (e.g. mpack_tag_make_bool() vs
* mpack_tag_bool_value().)
*
* The length and count for all compound types was the wrong sign (int32_t
* instead of uint32_t.) These preserve the old behaviour; the new "make"
* functions have the correct sign.
*/
/** \deprecated Renamed to mpack_tag_make_nil(). */
MPACK_INLINE mpack_tag_t mpack_tag_nil(void) {
return mpack_tag_make_nil();
}
/** \deprecated Renamed to mpack_tag_make_bool(). */
MPACK_INLINE mpack_tag_t mpack_tag_bool(bool value) {
return mpack_tag_make_bool(value);
}
/** \deprecated Renamed to mpack_tag_make_true(). */
MPACK_INLINE mpack_tag_t mpack_tag_true(void) {
return mpack_tag_make_true();
}
/** \deprecated Renamed to mpack_tag_make_false(). */
MPACK_INLINE mpack_tag_t mpack_tag_false(void) {
return mpack_tag_make_false();
}
/** \deprecated Renamed to mpack_tag_make_int(). */
MPACK_INLINE mpack_tag_t mpack_tag_int(int64_t value) {
return mpack_tag_make_int(value);
}
/** \deprecated Renamed to mpack_tag_make_uint(). */
MPACK_INLINE mpack_tag_t mpack_tag_uint(uint64_t value) {
return mpack_tag_make_uint(value);
}
/** \deprecated Renamed to mpack_tag_make_float(). */
MPACK_INLINE mpack_tag_t mpack_tag_float(float value) {
return mpack_tag_make_float(value);
}
/** \deprecated Renamed to mpack_tag_make_double(). */
MPACK_INLINE mpack_tag_t mpack_tag_double(double value) {
return mpack_tag_make_double(value);
}
/** \deprecated Renamed to mpack_tag_make_array(). */
MPACK_INLINE mpack_tag_t mpack_tag_array(int32_t count) {
return mpack_tag_make_array((uint32_t)count);
}
/** \deprecated Renamed to mpack_tag_make_map(). */
MPACK_INLINE mpack_tag_t mpack_tag_map(int32_t count) {
return mpack_tag_make_map((uint32_t)count);
}
/** \deprecated Renamed to mpack_tag_make_str(). */
MPACK_INLINE mpack_tag_t mpack_tag_str(int32_t length) {
return mpack_tag_make_str((uint32_t)length);
}
/** \deprecated Renamed to mpack_tag_make_bin(). */
MPACK_INLINE mpack_tag_t mpack_tag_bin(int32_t length) {
return mpack_tag_make_bin((uint32_t)length);
}
#if MPACK_EXTENSIONS
/** \deprecated Renamed to mpack_tag_make_ext(). */
MPACK_INLINE mpack_tag_t mpack_tag_ext(int8_t exttype, int32_t length) {
return mpack_tag_make_ext(exttype, (uint32_t)length);
}
#endif
/**
* @}
*/
/** @cond */
/*
* Helpers to perform unaligned network-endian loads and stores
* at arbitrary addresses. Byte-swapping builtins are used if they
* are available and if they improve performance.
*
* These will remain available in the public API so feel free to
* use them for other purposes, but they are undocumented.
*/
MPACK_INLINE uint8_t mpack_load_u8(const char* p) {
return (uint8_t)p[0];
}
MPACK_INLINE uint16_t mpack_load_u16(const char* p) {
#ifdef MPACK_NHSWAP16
uint16_t val;
mpack_memcpy(&val, p, sizeof(val));
return MPACK_NHSWAP16(val);
#else
return (uint16_t)((((uint16_t)(uint8_t)p[0]) << 8) |
((uint16_t)(uint8_t)p[1]));
#endif
}
MPACK_INLINE uint32_t mpack_load_u32(const char* p) {
#ifdef MPACK_NHSWAP32
uint32_t val;
mpack_memcpy(&val, p, sizeof(val));
return MPACK_NHSWAP32(val);
#else
return (((uint32_t)(uint8_t)p[0]) << 24) |
(((uint32_t)(uint8_t)p[1]) << 16) |
(((uint32_t)(uint8_t)p[2]) << 8) |
((uint32_t)(uint8_t)p[3]);
#endif
}
MPACK_INLINE uint64_t mpack_load_u64(const char* p) {
#ifdef MPACK_NHSWAP64
uint64_t val;
mpack_memcpy(&val, p, sizeof(val));
return MPACK_NHSWAP64(val);
#else
return (((uint64_t)(uint8_t)p[0]) << 56) |
(((uint64_t)(uint8_t)p[1]) << 48) |
(((uint64_t)(uint8_t)p[2]) << 40) |
(((uint64_t)(uint8_t)p[3]) << 32) |
(((uint64_t)(uint8_t)p[4]) << 24) |
(((uint64_t)(uint8_t)p[5]) << 16) |
(((uint64_t)(uint8_t)p[6]) << 8) |
((uint64_t)(uint8_t)p[7]);
#endif
}
MPACK_INLINE void mpack_store_u8(char* p, uint8_t val) {
uint8_t* u = (uint8_t*)p;
u[0] = val;
}
MPACK_INLINE void mpack_store_u16(char* p, uint16_t val) {
#ifdef MPACK_NHSWAP16
val = MPACK_NHSWAP16(val);
mpack_memcpy(p, &val, sizeof(val));
#else
uint8_t* u = (uint8_t*)p;
u[0] = (uint8_t)((val >> 8) & 0xFF);
u[1] = (uint8_t)( val & 0xFF);
#endif
}
MPACK_INLINE void mpack_store_u32(char* p, uint32_t val) {
#ifdef MPACK_NHSWAP32
val = MPACK_NHSWAP32(val);
mpack_memcpy(p, &val, sizeof(val));
#else
uint8_t* u = (uint8_t*)p;
u[0] = (uint8_t)((val >> 24) & 0xFF);
u[1] = (uint8_t)((val >> 16) & 0xFF);
u[2] = (uint8_t)((val >> 8) & 0xFF);
u[3] = (uint8_t)( val & 0xFF);
#endif
}
MPACK_INLINE void mpack_store_u64(char* p, uint64_t val) {
#ifdef MPACK_NHSWAP64
val = MPACK_NHSWAP64(val);
mpack_memcpy(p, &val, sizeof(val));
#else
uint8_t* u = (uint8_t*)p;
u[0] = (uint8_t)((val >> 56) & 0xFF);
u[1] = (uint8_t)((val >> 48) & 0xFF);
u[2] = (uint8_t)((val >> 40) & 0xFF);
u[3] = (uint8_t)((val >> 32) & 0xFF);
u[4] = (uint8_t)((val >> 24) & 0xFF);
u[5] = (uint8_t)((val >> 16) & 0xFF);
u[6] = (uint8_t)((val >> 8) & 0xFF);
u[7] = (uint8_t)( val & 0xFF);
#endif
}
MPACK_INLINE int8_t mpack_load_i8 (const char* p) {return (int8_t) mpack_load_u8 (p);}
MPACK_INLINE int16_t mpack_load_i16(const char* p) {return (int16_t)mpack_load_u16(p);}
MPACK_INLINE int32_t mpack_load_i32(const char* p) {return (int32_t)mpack_load_u32(p);}
MPACK_INLINE int64_t mpack_load_i64(const char* p) {return (int64_t)mpack_load_u64(p);}
MPACK_INLINE void mpack_store_i8 (char* p, int8_t val) {mpack_store_u8 (p, (uint8_t) val);}
MPACK_INLINE void mpack_store_i16(char* p, int16_t val) {mpack_store_u16(p, (uint16_t)val);}
MPACK_INLINE void mpack_store_i32(char* p, int32_t val) {mpack_store_u32(p, (uint32_t)val);}
MPACK_INLINE void mpack_store_i64(char* p, int64_t val) {mpack_store_u64(p, (uint64_t)val);}
MPACK_INLINE float mpack_load_float(const char* p) {
MPACK_CHECK_FLOAT_ORDER();
MPACK_STATIC_ASSERT(sizeof(float) == sizeof(uint32_t), "float is wrong size??");
union {
float f;
uint32_t u;
} v;
v.u = mpack_load_u32(p);
return v.f;
}
MPACK_INLINE double mpack_load_double(const char* p) {
MPACK_CHECK_FLOAT_ORDER();
MPACK_STATIC_ASSERT(sizeof(double) == sizeof(uint64_t), "double is wrong size??");
union {
double d;
uint64_t u;
} v;
v.u = mpack_load_u64(p);
return v.d;
}
MPACK_INLINE void mpack_store_float(char* p, float value) {
MPACK_CHECK_FLOAT_ORDER();
union {
float f;
uint32_t u;
} v;
v.f = value;
mpack_store_u32(p, v.u);
}
MPACK_INLINE void mpack_store_double(char* p, double value) {
MPACK_CHECK_FLOAT_ORDER();
union {
double d;
uint64_t u;
} v;
v.d = value;
mpack_store_u64(p, v.u);
}
/** @endcond */
/** @cond */
// Sizes in bytes for the various possible tags
#define MPACK_TAG_SIZE_FIXUINT 1
#define MPACK_TAG_SIZE_U8 2
#define MPACK_TAG_SIZE_U16 3
#define MPACK_TAG_SIZE_U32 5
#define MPACK_TAG_SIZE_U64 9
#define MPACK_TAG_SIZE_FIXINT 1
#define MPACK_TAG_SIZE_I8 2
#define MPACK_TAG_SIZE_I16 3
#define MPACK_TAG_SIZE_I32 5
#define MPACK_TAG_SIZE_I64 9
#define MPACK_TAG_SIZE_FLOAT 5
#define MPACK_TAG_SIZE_DOUBLE 9
#define MPACK_TAG_SIZE_FIXARRAY 1
#define MPACK_TAG_SIZE_ARRAY16 3
#define MPACK_TAG_SIZE_ARRAY32 5
#define MPACK_TAG_SIZE_FIXMAP 1
#define MPACK_TAG_SIZE_MAP16 3
#define MPACK_TAG_SIZE_MAP32 5
#define MPACK_TAG_SIZE_FIXSTR 1
#define MPACK_TAG_SIZE_STR8 2
#define MPACK_TAG_SIZE_STR16 3
#define MPACK_TAG_SIZE_STR32 5
#define MPACK_TAG_SIZE_BIN8 2
#define MPACK_TAG_SIZE_BIN16 3
#define MPACK_TAG_SIZE_BIN32 5
#define MPACK_TAG_SIZE_FIXEXT1 2
#define MPACK_TAG_SIZE_FIXEXT2 2
#define MPACK_TAG_SIZE_FIXEXT4 2
#define MPACK_TAG_SIZE_FIXEXT8 2
#define MPACK_TAG_SIZE_FIXEXT16 2
#define MPACK_TAG_SIZE_EXT8 3
#define MPACK_TAG_SIZE_EXT16 4
#define MPACK_TAG_SIZE_EXT32 6
// size in bytes for complete ext types
#define MPACK_EXT_SIZE_TIMESTAMP4 (MPACK_TAG_SIZE_FIXEXT4 + 4)
#define MPACK_EXT_SIZE_TIMESTAMP8 (MPACK_TAG_SIZE_FIXEXT8 + 8)
#define MPACK_EXT_SIZE_TIMESTAMP12 (MPACK_TAG_SIZE_EXT8 + 12)
/** @endcond */
#if MPACK_READ_TRACKING || MPACK_WRITE_TRACKING
/* Tracks the write state of compound elements (maps, arrays, */
/* strings, binary blobs and extension types) */
/** @cond */
typedef struct mpack_track_element_t {
mpack_type_t type;
uint64_t left; // we need 64-bit because (2 * INT32_MAX) elements can be stored in a map
} mpack_track_element_t;
typedef struct mpack_track_t {
size_t count;
size_t capacity;
mpack_track_element_t* elements;
} mpack_track_t;
#if MPACK_INTERNAL
mpack_error_t mpack_track_init(mpack_track_t* track);
mpack_error_t mpack_track_grow(mpack_track_t* track);
mpack_error_t mpack_track_push(mpack_track_t* track, mpack_type_t type, uint64_t count);
mpack_error_t mpack_track_pop(mpack_track_t* track, mpack_type_t type);
mpack_error_t mpack_track_element(mpack_track_t* track, bool read);
mpack_error_t mpack_track_peek_element(mpack_track_t* track, bool read);
mpack_error_t mpack_track_bytes(mpack_track_t* track, bool read, uint64_t count);
mpack_error_t mpack_track_str_bytes_all(mpack_track_t* track, bool read, uint64_t count);
mpack_error_t mpack_track_check_empty(mpack_track_t* track);
mpack_error_t mpack_track_destroy(mpack_track_t* track, bool cancel);
#endif
/** @endcond */
#endif
#if MPACK_INTERNAL
/** @cond */
/* Miscellaneous string functions */
/**
* Returns true if the given UTF-8 string is valid.
*/
bool mpack_utf8_check(const char* str, size_t bytes);
/**
* Returns true if the given UTF-8 string is valid and contains no null characters.
*/
bool mpack_utf8_check_no_null(const char* str, size_t bytes);
/**
* Returns true if the given string has no null bytes.
*/
bool mpack_str_check_no_null(const char* str, size_t bytes);
/** @endcond */
#endif
/**
* @}
*/
/**
* @}
*/
MPACK_HEADER_END
#endif
/* mpack/mpack-writer.h.h */
/**
* @file
*
* Declares the MPack Writer.
*/
#ifndef MPACK_WRITER_H
#define MPACK_WRITER_H 1
/* #include "mpack-common.h" */
MPACK_HEADER_START
#if MPACK_WRITER
#if MPACK_WRITE_TRACKING
struct mpack_track_t;
#endif
/**
* @defgroup writer Write API
*
* The MPack Write API encodes structured data of a fixed (hardcoded) schema to MessagePack.
*
* @{
*/
/**
* @def MPACK_WRITER_MINIMUM_BUFFER_SIZE
*
* The minimum buffer size for a writer with a flush function.
*/
#define MPACK_WRITER_MINIMUM_BUFFER_SIZE 32
/**
* A buffered MessagePack encoder.
*
* The encoder wraps an existing buffer and, optionally, a flush function.
* This allows efficiently encoding to an in-memory buffer or to a stream.
*
* All write operations are synchronous; they will block until the
* data is fully written, or an error occurs.
*/
typedef struct mpack_writer_t mpack_writer_t;
/**
* The MPack writer's flush function to flush the buffer to the output stream.
* It should flag an appropriate error on the writer if flushing fails (usually
* mpack_error_io or mpack_error_memory.)
*
* The specified context for callbacks is at writer->context.
*/
typedef void (*mpack_writer_flush_t)(mpack_writer_t* writer, const char* buffer, size_t count);
/**
* An error handler function to be called when an error is flagged on
* the writer.
*
* The error handler will only be called once on the first error flagged;
* any subsequent writes and errors are ignored, and the writer is
* permanently in that error state.
*
* MPack is safe against non-local jumps out of error handler callbacks.
* This means you are allowed to longjmp or throw an exception (in C++,
* Objective-C, or with SEH) out of this callback.
*
* Bear in mind when using longjmp that local non-volatile variables that
* have changed are undefined when setjmp() returns, so you can't put the
* writer on the stack in the same activation frame as the setjmp without
* declaring it volatile.
*
* You must still eventually destroy the writer. It is not destroyed
* automatically when an error is flagged. It is safe to destroy the
* writer within this error callback, but you will either need to perform
* a non-local jump, or store something in your context to identify
* that the writer is destroyed since any future accesses to it cause
* undefined behavior.
*/
typedef void (*mpack_writer_error_t)(mpack_writer_t* writer, mpack_error_t error);
/**
* A teardown function to be called when the writer is destroyed.
*/
typedef void (*mpack_writer_teardown_t)(mpack_writer_t* writer);
/* Hide internals from documentation */
/** @cond */
struct mpack_writer_t {
#if MPACK_COMPATIBILITY
mpack_version_t version; /* Version of the MessagePack spec to write */
#endif
mpack_writer_flush_t flush; /* Function to write bytes to the output stream */
mpack_writer_error_t error_fn; /* Function to call on error */
mpack_writer_teardown_t teardown; /* Function to teardown the context on destroy */
void* context; /* Context for writer callbacks */
char* buffer; /* Byte buffer */
char* current; /* Current position within the buffer */
char* end; /* The end of the buffer */
mpack_error_t error; /* Error state */
#if MPACK_WRITE_TRACKING
mpack_track_t track; /* Stack of map/array/str/bin/ext writes */
#endif
#ifdef MPACK_MALLOC
/* Reserved. You can use this space to allocate a custom
* context in order to reduce heap allocations. */
void* reserved[2];
#endif
};
#if MPACK_WRITE_TRACKING
void mpack_writer_track_push(mpack_writer_t* writer, mpack_type_t type, uint64_t count);
void mpack_writer_track_pop(mpack_writer_t* writer, mpack_type_t type);
void mpack_writer_track_element(mpack_writer_t* writer);
void mpack_writer_track_bytes(mpack_writer_t* writer, size_t count);
#else
MPACK_INLINE void mpack_writer_track_push(mpack_writer_t* writer, mpack_type_t type, uint64_t count) {
MPACK_UNUSED(writer);
MPACK_UNUSED(type);
MPACK_UNUSED(count);
}
MPACK_INLINE void mpack_writer_track_pop(mpack_writer_t* writer, mpack_type_t type) {
MPACK_UNUSED(writer);
MPACK_UNUSED(type);
}
MPACK_INLINE void mpack_writer_track_element(mpack_writer_t* writer) {
MPACK_UNUSED(writer);
}
MPACK_INLINE void mpack_writer_track_bytes(mpack_writer_t* writer, size_t count) {
MPACK_UNUSED(writer);
MPACK_UNUSED(count);
}
#endif
/** @endcond */
/**
* @name Lifecycle Functions
* @{
*/
/**
* Initializes an MPack writer with the given buffer. The writer
* does not assume ownership of the buffer.
*
* Trying to write past the end of the buffer will result in mpack_error_too_big
* unless a flush function is set with mpack_writer_set_flush(). To use the data
* without flushing, call mpack_writer_buffer_used() to determine the number of
* bytes written.
*
* @param writer The MPack writer.
* @param buffer The buffer into which to write MessagePack data.
* @param size The size of the buffer.
*/
void mpack_writer_init(mpack_writer_t* writer, char* buffer, size_t size);
#ifdef MPACK_MALLOC
/**
* Initializes an MPack writer using a growable buffer.
*
* The data is placed in the given data pointer if and when the writer
* is destroyed without error. The data pointer is NULL during writing,
* and will remain NULL if an error occurs.
*
* The allocated data must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @throws mpack_error_memory if the buffer fails to grow when
* flushing.
*
* @param writer The MPack writer.
* @param data Where to place the allocated data.
* @param size Where to write the size of the data.
*/
void mpack_writer_init_growable(mpack_writer_t* writer, char** data, size_t* size);
#endif
/**
* Initializes an MPack writer directly into an error state. Use this if you
* are writing a wrapper to mpack_writer_init() which can fail its setup.
*/
void mpack_writer_init_error(mpack_writer_t* writer, mpack_error_t error);
#if MPACK_STDIO
/**
* Initializes an MPack writer that writes to a file.
*
* @throws mpack_error_memory if allocation fails
* @throws mpack_error_io if the file cannot be opened
*/
void mpack_writer_init_filename(mpack_writer_t* writer, const char* filename);
/**
* Deprecated.
*
* \deprecated Renamed to mpack_writer_init_filename().
*/
MPACK_INLINE void mpack_writer_init_file(mpack_writer_t* writer, const char* filename) {
mpack_writer_init_filename(writer, filename);
}
/**
* Initializes an MPack writer that writes to a libc FILE. This can be used to
* write to stdout or stderr, or to a file opened separately.
*
* @param writer The MPack writer.
* @param stdfile The FILE.
* @param close_when_done If true, fclose() will be called on the FILE when it
* is no longer needed. If false, the file will not be flushed or
* closed when writing is done.
*
* @note The writer is buffered. If you want to write other data to the FILE in
* between messages, you must flush it first.
*
* @see mpack_writer_flush_message
*/
void mpack_writer_init_stdfile(mpack_writer_t* writer, FILE* stdfile, bool close_when_done);
#endif
/** @cond */
#define mpack_writer_init_stack_line_ex(line, writer) \
char mpack_buf_##line[MPACK_STACK_SIZE]; \
mpack_writer_init(writer, mpack_buf_##line, sizeof(mpack_buf_##line))
#define mpack_writer_init_stack_line(line, writer) \
mpack_writer_init_stack_line_ex(line, writer)
/*
* Initializes an MPack writer using stack space as a buffer. A flush function
* should be added to the writer to flush the buffer.
*
* This is currently undocumented since it's not entirely useful on its own.
*/
#define mpack_writer_init_stack(writer) \
mpack_writer_init_stack_line(__LINE__, (writer))
/** @endcond */
/**
* Cleans up the MPack writer, flushing and closing the underlying stream,
* if any. Returns the final error state of the writer.
*
* No flushing is performed if the writer is in an error state. The attached
* teardown function is called whether or not the writer is in an error state.
*
* This will assert in tracking mode if the writer is not in an error
* state and has any unclosed compound types. If you want to cancel
* writing in the middle of a document, you need to flag an error on
* the writer before destroying it (such as mpack_error_data).
*
* Note that a writer may raise an error and call your error handler during
* the final flush. It is safe to longjmp or throw out of this error handler,
* but if you do, the writer will not be destroyed, and the teardown function
* will not be called. You can still get the writer's error state, and you
* must call @ref mpack_writer_destroy() again. (The second call is guaranteed
* not to call your error handler again since the writer is already in an error
* state.)
*
* @see mpack_writer_set_error_handler
* @see mpack_writer_set_flush
* @see mpack_writer_set_teardown
* @see mpack_writer_flag_error
* @see mpack_error_data
*/
mpack_error_t mpack_writer_destroy(mpack_writer_t* writer);
/**
* @}
*/
/**
* @name Configuration
* @{
*/
#if MPACK_COMPATIBILITY
/**
* Sets the version of the MessagePack spec that will be generated.
*
* This can be used to interface with older libraries that do not support
* the newest MessagePack features (such as the @c str8 type.)
*
* @note This requires @ref MPACK_COMPATIBILITY.
*/
MPACK_INLINE void mpack_writer_set_version(mpack_writer_t* writer, mpack_version_t version) {
writer->version = version;
}
#endif
/**
* Sets the custom pointer to pass to the writer callbacks, such as flush
* or teardown.
*
* @param writer The MPack writer.
* @param context User data to pass to the writer callbacks.
*
* @see mpack_writer_context()
*/
MPACK_INLINE void mpack_writer_set_context(mpack_writer_t* writer, void* context) {
writer->context = context;
}
/**
* Returns the custom context for writer callbacks.
*
* @see mpack_writer_set_context
* @see mpack_writer_set_flush
*/
MPACK_INLINE void* mpack_writer_context(mpack_writer_t* writer) {
return writer->context;
}
/**
* Sets the flush function to write out the data when the buffer is full.
*
* If no flush function is used, trying to write past the end of the
* buffer will result in mpack_error_too_big.
*
* This should normally be used with mpack_writer_set_context() to register
* a custom pointer to pass to the flush function.
*
* @param writer The MPack writer.
* @param flush The function to write out data from the buffer.
*
* @see mpack_writer_context()
*/
void mpack_writer_set_flush(mpack_writer_t* writer, mpack_writer_flush_t flush);
/**
* Sets the error function to call when an error is flagged on the writer.
*
* This should normally be used with mpack_writer_set_context() to register
* a custom pointer to pass to the error function.
*
* See the definition of mpack_writer_error_t for more information about
* what you can do from an error callback.
*
* @see mpack_writer_error_t
* @param writer The MPack writer.
* @param error_fn The function to call when an error is flagged on the writer.
*/
MPACK_INLINE void mpack_writer_set_error_handler(mpack_writer_t* writer, mpack_writer_error_t error_fn) {
writer->error_fn = error_fn;
}
/**
* Sets the teardown function to call when the writer is destroyed.
*
* This should normally be used with mpack_writer_set_context() to register
* a custom pointer to pass to the teardown function.
*
* @param writer The MPack writer.
* @param teardown The function to call when the writer is destroyed.
*/
MPACK_INLINE void mpack_writer_set_teardown(mpack_writer_t* writer, mpack_writer_teardown_t teardown) {
writer->teardown = teardown;
}
/**
* @}
*/
/**
* @name Core Writer Functions
* @{
*/
/**
* Flushes any buffered data to the underlying stream.
*
* If write tracking is enabled, this will break and flag @ref
* mpack_error_bug if the writer has any open compound types, ensuring
* that no compound types are still open. This prevents a "missing
* finish" bug from causing a never-ending message.
*
* If the writer is connected to a socket and you are keeping it open,
* you will want to call this after writing a message (or set of
* messages) so that the data is actually sent.
*
* It is not necessary to call this if you are not keeping the writer
* open afterwards. You can just call `mpack_writer_destroy()`, and it
* will flush before cleaning up.
*
* This will assert if no flush function is assigned to the writer.
*/
void mpack_writer_flush_message(mpack_writer_t* writer);
/**
* Returns the number of bytes currently stored in the buffer. This
* may be less than the total number of bytes written if bytes have
* been flushed to an underlying stream.
*/
MPACK_INLINE size_t mpack_writer_buffer_used(mpack_writer_t* writer) {
return (size_t)(writer->current - writer->buffer);
}
/**
* Returns the amount of space left in the buffer. This may be reset
* after a write if bytes are flushed to an underlying stream.
*/
MPACK_INLINE size_t mpack_writer_buffer_left(mpack_writer_t* writer) {
return (size_t)(writer->end - writer->current);
}
/**
* Returns the (current) size of the buffer. This may change after a write if
* the flush callback changes the buffer.
*/
MPACK_INLINE size_t mpack_writer_buffer_size(mpack_writer_t* writer) {
return (size_t)(writer->end - writer->buffer);
}
/**
* Places the writer in the given error state, calling the error callback if one
* is set.
*
* This allows you to externally flag errors, for example if you are validating
* data as you write it, or if you want to cancel writing in the middle of a
* document. (The writer will assert if you try to destroy it without error and
* with unclosed compound types. In this case you should flag mpack_error_data
* before destroying it.)
*
* If the writer is already in an error state, this call is ignored and no
* error callback is called.
*
* @see mpack_writer_destroy
* @see mpack_error_data
*/
void mpack_writer_flag_error(mpack_writer_t* writer, mpack_error_t error);
/**
* Queries the error state of the MPack writer.
*
* If a writer is in an error state, you should discard all data since the
* last time the error flag was checked. The error flag cannot be cleared.
*/
MPACK_INLINE mpack_error_t mpack_writer_error(mpack_writer_t* writer) {
return writer->error;
}
/**
* Writes a MessagePack object header (an MPack Tag.)
*
* If the value is a map, array, string, binary or extension type, the
* containing elements or bytes must be written separately and the
* appropriate finish function must be called (as though one of the
* mpack_start_*() functions was called.)
*
* @see mpack_write_bytes()
* @see mpack_finish_map()
* @see mpack_finish_array()
* @see mpack_finish_str()
* @see mpack_finish_bin()
* @see mpack_finish_ext()
* @see mpack_finish_type()
*/
void mpack_write_tag(mpack_writer_t* writer, mpack_tag_t tag);
/**
* @}
*/
/**
* @name Integers
* @{
*/
/** Writes an 8-bit integer in the most efficient packing available. */
void mpack_write_i8(mpack_writer_t* writer, int8_t value);
/** Writes a 16-bit integer in the most efficient packing available. */
void mpack_write_i16(mpack_writer_t* writer, int16_t value);
/** Writes a 32-bit integer in the most efficient packing available. */
void mpack_write_i32(mpack_writer_t* writer, int32_t value);
/** Writes a 64-bit integer in the most efficient packing available. */
void mpack_write_i64(mpack_writer_t* writer, int64_t value);
/** Writes an integer in the most efficient packing available. */
MPACK_INLINE void mpack_write_int(mpack_writer_t* writer, int64_t value) {
mpack_write_i64(writer, value);
}
/** Writes an 8-bit unsigned integer in the most efficient packing available. */
void mpack_write_u8(mpack_writer_t* writer, uint8_t value);
/** Writes an 16-bit unsigned integer in the most efficient packing available. */
void mpack_write_u16(mpack_writer_t* writer, uint16_t value);
/** Writes an 32-bit unsigned integer in the most efficient packing available. */
void mpack_write_u32(mpack_writer_t* writer, uint32_t value);
/** Writes an 64-bit unsigned integer in the most efficient packing available. */
void mpack_write_u64(mpack_writer_t* writer, uint64_t value);
/** Writes an unsigned integer in the most efficient packing available. */
MPACK_INLINE void mpack_write_uint(mpack_writer_t* writer, uint64_t value) {
mpack_write_u64(writer, value);
}
/**
* @}
*/
/**
* @name Other Basic Types
* @{
*/
/** Writes a float. */
void mpack_write_float(mpack_writer_t* writer, float value);
/** Writes a double. */
void mpack_write_double(mpack_writer_t* writer, double value);
/** Writes a boolean. */
void mpack_write_bool(mpack_writer_t* writer, bool value);
/** Writes a boolean with value true. */
void mpack_write_true(mpack_writer_t* writer);
/** Writes a boolean with value false. */
void mpack_write_false(mpack_writer_t* writer);
/** Writes a nil. */
void mpack_write_nil(mpack_writer_t* writer);
/** Write a pre-encoded messagepack object */
void mpack_write_object_bytes(mpack_writer_t* writer, const char* data, size_t bytes);
#if MPACK_EXTENSIONS
/**
* Writes a timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @param writer The writer
* @param seconds The (signed) number of seconds since 1970-01-01T00:00:00Z.
* @param nanoseconds The additional number of nanoseconds from 0 to 999,999,999 inclusive.
*/
void mpack_write_timestamp(mpack_writer_t* writer, int64_t seconds, uint32_t nanoseconds);
/**
* Writes a timestamp with the given number of seconds (and zero nanoseconds).
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @param writer The writer
* @param seconds The (signed) number of seconds since 1970-01-01T00:00:00Z.
*/
MPACK_INLINE void mpack_write_timestamp_seconds(mpack_writer_t* writer, int64_t seconds) {
mpack_write_timestamp(writer, seconds, 0);
}
/**
* Writes a timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
MPACK_INLINE void mpack_write_timestamp_struct(mpack_writer_t* writer, mpack_timestamp_t timestamp) {
mpack_write_timestamp(writer, timestamp.seconds, timestamp.nanoseconds);
}
#endif
/**
* @}
*/
/**
* @name Map and Array Functions
* @{
*/
/**
* Opens an array.
*
* `count` elements must follow, and mpack_finish_array() must be called
* when done.
*
* @see mpack_finish_array()
*/
void mpack_start_array(mpack_writer_t* writer, uint32_t count);
/**
* Opens a map.
*
* `count * 2` elements must follow, and mpack_finish_map() must be called
* when done.
*
* Remember that while map elements in MessagePack are implicitly ordered,
* they are not ordered in JSON. If you need elements to be read back
* in the order they are written, consider use an array instead.
*
* @see mpack_finish_map()
*/
void mpack_start_map(mpack_writer_t* writer, uint32_t count);
/**
* Finishes writing an array.
*
* This should be called only after a corresponding call to mpack_start_array()
* and after the array contents are written.
*
* This will track writes to ensure that the correct number of elements are written.
*
* @see mpack_start_array()
*/
MPACK_INLINE void mpack_finish_array(mpack_writer_t* writer) {
mpack_writer_track_pop(writer, mpack_type_array);
}
/**
* Finishes writing a map.
*
* This should be called only after a corresponding call to mpack_start_map()
* and after the map contents are written.
*
* This will track writes to ensure that the correct number of elements are written.
*
* @see mpack_start_map()
*/
MPACK_INLINE void mpack_finish_map(mpack_writer_t* writer) {
mpack_writer_track_pop(writer, mpack_type_map);
}
/**
* @}
*/
/**
* @name Data Helpers
* @{
*/
/**
* Writes a string.
*
* To stream a string in chunks, use mpack_start_str() instead.
*
* MPack does not care about the underlying encoding, but UTF-8 is highly
* recommended, especially for compatibility with JSON. You should consider
* calling mpack_write_utf8() instead, especially if you will be reading
* it back as UTF-8.
*
* You should not call mpack_finish_str() after calling this; this
* performs both start and finish.
*/
void mpack_write_str(mpack_writer_t* writer, const char* str, uint32_t length);
/**
* Writes a string, ensuring that it is valid UTF-8.
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed.
*
* You should not call mpack_finish_str() after calling this; this
* performs both start and finish.
*
* @throws mpack_error_invalid if the string is not valid UTF-8
*/
void mpack_write_utf8(mpack_writer_t* writer, const char* str, uint32_t length);
/**
* Writes a null-terminated string. (The null-terminator is not written.)
*
* MPack does not care about the underlying encoding, but UTF-8 is highly
* recommended, especially for compatibility with JSON. You should consider
* calling mpack_write_utf8_cstr() instead, especially if you will be reading
* it back as UTF-8.
*
* You should not call mpack_finish_str() after calling this; this
* performs both start and finish.
*/
void mpack_write_cstr(mpack_writer_t* writer, const char* cstr);
/**
* Writes a null-terminated string, or a nil node if the given cstr pointer
* is NULL. (The null-terminator is not written.)
*
* MPack does not care about the underlying encoding, but UTF-8 is highly
* recommended, especially for compatibility with JSON. You should consider
* calling mpack_write_utf8_cstr_or_nil() instead, especially if you will
* be reading it back as UTF-8.
*
* You should not call mpack_finish_str() after calling this; this
* performs both start and finish.
*/
void mpack_write_cstr_or_nil(mpack_writer_t* writer, const char* cstr);
/**
* Writes a null-terminated string, ensuring that it is valid UTF-8. (The
* null-terminator is not written.)
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed.
*
* You should not call mpack_finish_str() after calling this; this
* performs both start and finish.
*
* @throws mpack_error_invalid if the string is not valid UTF-8
*/
void mpack_write_utf8_cstr(mpack_writer_t* writer, const char* cstr);
/**
* Writes a null-terminated string ensuring that it is valid UTF-8, or
* writes nil if the given cstr pointer is NULL. (The null-terminator
* is not written.)
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed.
*
* You should not call mpack_finish_str() after calling this; this
* performs both start and finish.
*
* @throws mpack_error_invalid if the string is not valid UTF-8
*/
void mpack_write_utf8_cstr_or_nil(mpack_writer_t* writer, const char* cstr);
/**
* Writes a binary blob.
*
* To stream a binary blob in chunks, use mpack_start_bin() instead.
*
* You should not call mpack_finish_bin() after calling this; this
* performs both start and finish.
*/
void mpack_write_bin(mpack_writer_t* writer, const char* data, uint32_t count);
#if MPACK_EXTENSIONS
/**
* Writes an extension type.
*
* To stream an extension blob in chunks, use mpack_start_ext() instead.
*
* Extension types [0, 127] are available for application-specific types. Extension
* types [-128, -1] are reserved for future extensions of MessagePack.
*
* You should not call mpack_finish_ext() after calling this; this
* performs both start and finish.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
void mpack_write_ext(mpack_writer_t* writer, int8_t exttype, const char* data, uint32_t count);
#endif
/**
* @}
*/
/**
* @name Chunked Data Functions
* @{
*/
/**
* Opens a string. `count` bytes should be written with calls to
* mpack_write_bytes(), and mpack_finish_str() should be called
* when done.
*
* To write an entire string at once, use mpack_write_str() or
* mpack_write_cstr() instead.
*
* MPack does not care about the underlying encoding, but UTF-8 is highly
* recommended, especially for compatibility with JSON.
*/
void mpack_start_str(mpack_writer_t* writer, uint32_t count);
/**
* Opens a binary blob. `count` bytes should be written with calls to
* mpack_write_bytes(), and mpack_finish_bin() should be called
* when done.
*/
void mpack_start_bin(mpack_writer_t* writer, uint32_t count);
#if MPACK_EXTENSIONS
/**
* Opens an extension type. `count` bytes should be written with calls
* to mpack_write_bytes(), and mpack_finish_ext() should be called
* when done.
*
* Extension types [0, 127] are available for application-specific types. Extension
* types [-128, -1] are reserved for future extensions of MessagePack.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
void mpack_start_ext(mpack_writer_t* writer, int8_t exttype, uint32_t count);
#endif
/**
* Writes a portion of bytes for a string, binary blob or extension type which
* was opened by mpack_write_tag() or one of the mpack_start_*() functions.
*
* This can be called multiple times to write the data in chunks, as long as
* the total amount of bytes written matches the count given when the compound
* type was started.
*
* The corresponding mpack_finish_*() function must be called when done.
*
* To write an entire string, binary blob or extension type at
* once, use one of the mpack_write_*() functions instead.
*
* @see mpack_write_tag()
* @see mpack_start_str()
* @see mpack_start_bin()
* @see mpack_start_ext()
* @see mpack_finish_str()
* @see mpack_finish_bin()
* @see mpack_finish_ext()
* @see mpack_finish_type()
*/
void mpack_write_bytes(mpack_writer_t* writer, const char* data, size_t count);
/**
* Finishes writing a string.
*
* This should be called only after a corresponding call to mpack_start_str()
* and after the string bytes are written with mpack_write_bytes().
*
* This will track writes to ensure that the correct number of elements are written.
*
* @see mpack_start_str()
* @see mpack_write_bytes()
*/
MPACK_INLINE void mpack_finish_str(mpack_writer_t* writer) {
mpack_writer_track_pop(writer, mpack_type_str);
}
/**
* Finishes writing a binary blob.
*
* This should be called only after a corresponding call to mpack_start_bin()
* and after the binary bytes are written with mpack_write_bytes().
*
* This will track writes to ensure that the correct number of bytes are written.
*
* @see mpack_start_bin()
* @see mpack_write_bytes()
*/
MPACK_INLINE void mpack_finish_bin(mpack_writer_t* writer) {
mpack_writer_track_pop(writer, mpack_type_bin);
}
#if MPACK_EXTENSIONS
/**
* Finishes writing an extended type binary data blob.
*
* This should be called only after a corresponding call to mpack_start_bin()
* and after the binary bytes are written with mpack_write_bytes().
*
* This will track writes to ensure that the correct number of bytes are written.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @see mpack_start_ext()
* @see mpack_write_bytes()
*/
MPACK_INLINE void mpack_finish_ext(mpack_writer_t* writer) {
mpack_writer_track_pop(writer, mpack_type_ext);
}
#endif
/**
* Finishes writing the given compound type.
*
* This will track writes to ensure that the correct number of elements
* or bytes are written.
*
* This can be called with the appropriate type instead the corresponding
* mpack_finish_*() function if you want to finish a dynamic type.
*/
MPACK_INLINE void mpack_finish_type(mpack_writer_t* writer, mpack_type_t type) {
mpack_writer_track_pop(writer, type);
}
/**
* @}
*/
#if MPACK_WRITER && MPACK_HAS_GENERIC && !defined(__cplusplus)
/**
* @name Type-Generic Writers
* @{
*/
/**
* @def mpack_write(writer, value)
*
* Type-generic writer for primitive types.
*
* The compiler will dispatch to an appropriate write function based
* on the type of the @a value parameter.
*
* @note This requires C11 `_Generic` support. (A set of inline overloads
* are used in C++ to provide the same functionality.)
*
* @warning In C11, the indentifiers `true`, `false` and `NULL` are
* all of type `int`, not `bool` or `void*`! They will emit unexpected
* types when passed uncast, so be careful when using them.
*/
#define mpack_write(writer, value) \
_Generic(((void)0, value), \
int8_t: mpack_write_i8, \
int16_t: mpack_write_i16, \
int32_t: mpack_write_i32, \
int64_t: mpack_write_i64, \
uint8_t: mpack_write_u8, \
uint16_t: mpack_write_u16, \
uint32_t: mpack_write_u32, \
uint64_t: mpack_write_u64, \
bool: mpack_write_bool, \
float: mpack_write_float, \
double: mpack_write_double, \
char *: mpack_write_cstr_or_nil, \
const char *: mpack_write_cstr_or_nil \
)(writer, value)
/**
* @def mpack_write_kv(writer, key, value)
*
* Type-generic writer for key-value pairs of null-terminated string
* keys and primitive values.
*
* @warning @a writer may be evaluated multiple times.
*
* @warning In C11, the indentifiers `true`, `false` and `NULL` are
* all of type `int`, not `bool` or `void*`! They will emit unexpected
* types when passed uncast, so be careful when using them.
*
* @param writer The writer.
* @param key A null-terminated C string.
* @param value A primitive type supported by mpack_write().
*/
#define mpack_write_kv(writer, key, value) do { \
mpack_write_cstr(writer, key); \
mpack_write(writer, value); \
} while (0)
/**
* @}
*/
#endif
/**
* @}
*/
#endif
MPACK_HEADER_END
#if defined(__cplusplus) || defined(MPACK_DOXYGEN)
/*
* C++ generic writers for primitive values
*
* These currently sit outside of MPACK_HEADER_END because it defines
* extern "C". They'll be moved to a C++-specific header soon.
*/
#ifdef MPACK_DOXYGEN
#undef mpack_write
#undef mpack_write_kv
#endif
MPACK_INLINE void mpack_write(mpack_writer_t* writer, int8_t value) {
mpack_write_i8(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, int16_t value) {
mpack_write_i16(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, int32_t value) {
mpack_write_i32(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, int64_t value) {
mpack_write_i64(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, uint8_t value) {
mpack_write_u8(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, uint16_t value) {
mpack_write_u16(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, uint32_t value) {
mpack_write_u32(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, uint64_t value) {
mpack_write_u64(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, bool value) {
mpack_write_bool(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, float value) {
mpack_write_float(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, double value) {
mpack_write_double(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, char *value) {
mpack_write_cstr_or_nil(writer, value);
}
MPACK_INLINE void mpack_write(mpack_writer_t* writer, const char *value) {
mpack_write_cstr_or_nil(writer, value);
}
/* C++ generic write for key-value pairs */
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, int8_t value) {
mpack_write_cstr(writer, key);
mpack_write_i8(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, int16_t value) {
mpack_write_cstr(writer, key);
mpack_write_i16(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, int32_t value) {
mpack_write_cstr(writer, key);
mpack_write_i32(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, int64_t value) {
mpack_write_cstr(writer, key);
mpack_write_i64(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, uint8_t value) {
mpack_write_cstr(writer, key);
mpack_write_u8(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, uint16_t value) {
mpack_write_cstr(writer, key);
mpack_write_u16(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, uint32_t value) {
mpack_write_cstr(writer, key);
mpack_write_u32(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, uint64_t value) {
mpack_write_cstr(writer, key);
mpack_write_u64(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, bool value) {
mpack_write_cstr(writer, key);
mpack_write_bool(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, float value) {
mpack_write_cstr(writer, key);
mpack_write_float(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, double value) {
mpack_write_cstr(writer, key);
mpack_write_double(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, char *value) {
mpack_write_cstr(writer, key);
mpack_write_cstr_or_nil(writer, value);
}
MPACK_INLINE void mpack_write_kv(mpack_writer_t* writer, const char *key, const char *value) {
mpack_write_cstr(writer, key);
mpack_write_cstr_or_nil(writer, value);
}
#endif /* __cplusplus */
#endif
/* mpack/mpack-reader.h.h */
/**
* @file
*
* Declares the core MPack Tag Reader.
*/
#ifndef MPACK_READER_H
#define MPACK_READER_H 1
/* #include "mpack-common.h" */
MPACK_HEADER_START
#if MPACK_READER
#if MPACK_READ_TRACKING
struct mpack_track_t;
#endif
// The denominator to determine whether a read is a small
// fraction of the buffer size.
#define MPACK_READER_SMALL_FRACTION_DENOMINATOR 32
/**
* @defgroup reader Reader API
*
* The MPack Reader API contains functions for imperatively reading dynamically
* typed data from a MessagePack stream.
*
* See @ref docs/reader.md for examples.
*
* @note If you are not writing code for an embedded device (or otherwise do
* not need maximum performance with minimal memory usage), you should not use
* this. You probably want to use the @link node Node API@endlink instead.
*
* This forms the basis of the @link expect Expect API@endlink, which can be
* used to interpret the stream of elements in expected types and value ranges.
*
* @{
*/
/**
* @def MPACK_READER_MINIMUM_BUFFER_SIZE
*
* The minimum buffer size for a reader with a fill function.
*/
#define MPACK_READER_MINIMUM_BUFFER_SIZE 32
/**
* A buffered MessagePack decoder.
*
* The decoder wraps an existing buffer and, optionally, a fill function.
* This allows efficiently decoding data from existing memory buffers, files,
* streams, etc.
*
* All read operations are synchronous; they will block until the
* requested data is fully read, or an error occurs.
*
* This structure is opaque; its fields should not be accessed outside
* of MPack.
*/
typedef struct mpack_reader_t mpack_reader_t;
/**
* The MPack reader's fill function. It should fill the buffer with at
* least one byte and at most the given @c count, returning the number
* of bytes written to the buffer.
*
* In case of error, it should flag an appropriate error on the reader
* (usually @ref mpack_error_io), or simply return zero. If zero is
* returned, mpack_error_io is raised.
*
* @note When reading from a stream, you should only copy and return
* the bytes that are immediately available. It is always safe to return
* less than the requested count as long as some non-zero number of bytes
* are read; if more bytes are needed, the read function will simply be
* called again.
*
* @see mpack_reader_context()
*/
typedef size_t (*mpack_reader_fill_t)(mpack_reader_t* reader, char* buffer, size_t count);
/**
* The MPack reader's skip function. It should discard the given number
* of bytes from the source (for example by seeking forward.)
*
* In case of error, it should flag an appropriate error on the reader.
*
* @see mpack_reader_context()
*/
typedef void (*mpack_reader_skip_t)(mpack_reader_t* reader, size_t count);
/**
* An error handler function to be called when an error is flagged on
* the reader.
*
* The error handler will only be called once on the first error flagged;
* any subsequent reads and errors are ignored, and the reader is
* permanently in that error state.
*
* MPack is safe against non-local jumps out of error handler callbacks.
* This means you are allowed to longjmp or throw an exception (in C++,
* Objective-C, or with SEH) out of this callback.
*
* Bear in mind when using longjmp that local non-volatile variables that
* have changed are undefined when setjmp() returns, so you can't put the
* reader on the stack in the same activation frame as the setjmp without
* declaring it volatile.
*
* You must still eventually destroy the reader. It is not destroyed
* automatically when an error is flagged. It is safe to destroy the
* reader within this error callback, but you will either need to perform
* a non-local jump, or store something in your context to identify
* that the reader is destroyed since any future accesses to it cause
* undefined behavior.
*/
typedef void (*mpack_reader_error_t)(mpack_reader_t* reader, mpack_error_t error);
/**
* A teardown function to be called when the reader is destroyed.
*/
typedef void (*mpack_reader_teardown_t)(mpack_reader_t* reader);
/* Hide internals from documentation */
/** @cond */
struct mpack_reader_t {
void* context; /* Context for reader callbacks */
mpack_reader_fill_t fill; /* Function to read bytes into the buffer */
mpack_reader_error_t error_fn; /* Function to call on error */
mpack_reader_teardown_t teardown; /* Function to teardown the context on destroy */
mpack_reader_skip_t skip; /* Function to skip bytes from the source */
char* buffer; /* Writeable byte buffer */
size_t size; /* Size of the buffer */
const char* data; /* Current data pointer (in the buffer, if it is used) */
const char* end; /* The end of available data (in the buffer, if it is used) */
mpack_error_t error; /* Error state */
#if MPACK_READ_TRACKING
mpack_track_t track; /* Stack of map/array/str/bin/ext reads */
#endif
};
/** @endcond */
/**
* @name Lifecycle Functions
* @{
*/
/**
* Initializes an MPack reader with the given buffer. The reader does
* not assume ownership of the buffer, but the buffer must be writeable
* if a fill function will be used to refill it.
*
* @param reader The MPack reader.
* @param buffer The buffer with which to read MessagePack data.
* @param size The size of the buffer.
* @param count The number of bytes already in the buffer.
*/
void mpack_reader_init(mpack_reader_t* reader, char* buffer, size_t size, size_t count);
/**
* Initializes an MPack reader directly into an error state. Use this if you
* are writing a wrapper to mpack_reader_init() which can fail its setup.
*/
void mpack_reader_init_error(mpack_reader_t* reader, mpack_error_t error);
/**
* Initializes an MPack reader to parse a pre-loaded contiguous chunk of data. The
* reader does not assume ownership of the data.
*
* @param reader The MPack reader.
* @param data The data to parse.
* @param count The number of bytes pointed to by data.
*/
void mpack_reader_init_data(mpack_reader_t* reader, const char* data, size_t count);
#if MPACK_STDIO
/**
* Initializes an MPack reader that reads from a file.
*
* The file will be automatically opened and closed by the reader.
*/
void mpack_reader_init_filename(mpack_reader_t* reader, const char* filename);
/**
* Deprecated.
*
* \deprecated Renamed to mpack_reader_init_filename().
*/
MPACK_INLINE void mpack_reader_init_file(mpack_reader_t* reader, const char* filename) {
mpack_reader_init_filename(reader, filename);
}
/**
* Initializes an MPack reader that reads from a libc FILE. This can be used to
* read from stdin, or from a file opened separately.
*
* @param reader The MPack reader.
* @param stdfile The FILE.
* @param close_when_done If true, fclose() will be called on the FILE when it
* is no longer needed. If false, the file will not be closed when
* reading is done.
*
* @warning The reader is buffered. It will read data in advance of parsing it,
* and it may read more data than it parsed. See mpack_reader_remaining() to
* access the extra data.
*/
void mpack_reader_init_stdfile(mpack_reader_t* reader, FILE* stdfile, bool close_when_done);
#endif
/**
* @def mpack_reader_init_stack(reader)
* @hideinitializer
*
* Initializes an MPack reader using stack space as a buffer. A fill function
* should be added to the reader to fill the buffer.
*
* @see mpack_reader_set_fill
*/
/** @cond */
#define mpack_reader_init_stack_line_ex(line, reader) \
char mpack_buf_##line[MPACK_STACK_SIZE]; \
mpack_reader_init((reader), mpack_buf_##line, sizeof(mpack_buf_##line), 0)
#define mpack_reader_init_stack_line(line, reader) \
mpack_reader_init_stack_line_ex(line, reader)
/** @endcond */
#define mpack_reader_init_stack(reader) \
mpack_reader_init_stack_line(__LINE__, (reader))
/**
* Cleans up the MPack reader, ensuring that all compound elements
* have been completely read. Returns the final error state of the
* reader.
*
* This will assert in tracking mode if the reader is not in an error
* state and has any incomplete reads. If you want to cancel reading
* in the middle of a document, you need to flag an error on the reader
* before destroying it (such as mpack_error_data).
*
* @see mpack_read_tag()
* @see mpack_reader_flag_error()
* @see mpack_error_data
*/
mpack_error_t mpack_reader_destroy(mpack_reader_t* reader);
/**
* @}
*/
/**
* @name Callbacks
* @{
*/
/**
* Sets the custom pointer to pass to the reader callbacks, such as fill
* or teardown.
*
* @param reader The MPack reader.
* @param context User data to pass to the reader callbacks.
*
* @see mpack_reader_context()
*/
MPACK_INLINE void mpack_reader_set_context(mpack_reader_t* reader, void* context) {
reader->context = context;
}
/**
* Returns the custom context for reader callbacks.
*
* @see mpack_reader_set_context
* @see mpack_reader_set_fill
* @see mpack_reader_set_skip
*/
MPACK_INLINE void* mpack_reader_context(mpack_reader_t* reader) {
return reader->context;
}
/**
* Sets the fill function to refill the data buffer when it runs out of data.
*
* If no fill function is used, truncated MessagePack data results in
* mpack_error_invalid (since the buffer is assumed to contain a
* complete MessagePack object.)
*
* If a fill function is used, truncated MessagePack data usually
* results in mpack_error_io (since the fill function fails to get
* the missing data.)
*
* This should normally be used with mpack_reader_set_context() to register
* a custom pointer to pass to the fill function.
*
* @param reader The MPack reader.
* @param fill The function to fetch additional data into the buffer.
*/
void mpack_reader_set_fill(mpack_reader_t* reader, mpack_reader_fill_t fill);
/**
* Sets the skip function to discard bytes from the source stream.
*
* It's not necessary to implement this function. If the stream is not
* seekable, don't set a skip callback. The reader will fall back to
* using the fill function instead.
*
* This should normally be used with mpack_reader_set_context() to register
* a custom pointer to pass to the skip function.
*
* The skip function is ignored in size-optimized builds to reduce code
* size. Data will be skipped with the fill function when necessary.
*
* @param reader The MPack reader.
* @param skip The function to discard bytes from the source stream.
*/
void mpack_reader_set_skip(mpack_reader_t* reader, mpack_reader_skip_t skip);
/**
* Sets the error function to call when an error is flagged on the reader.
*
* This should normally be used with mpack_reader_set_context() to register
* a custom pointer to pass to the error function.
*
* See the definition of mpack_reader_error_t for more information about
* what you can do from an error callback.
*
* @see mpack_reader_error_t
* @param reader The MPack reader.
* @param error_fn The function to call when an error is flagged on the reader.
*/
MPACK_INLINE void mpack_reader_set_error_handler(mpack_reader_t* reader, mpack_reader_error_t error_fn) {
reader->error_fn = error_fn;
}
/**
* Sets the teardown function to call when the reader is destroyed.
*
* This should normally be used with mpack_reader_set_context() to register
* a custom pointer to pass to the teardown function.
*
* @param reader The MPack reader.
* @param teardown The function to call when the reader is destroyed.
*/
MPACK_INLINE void mpack_reader_set_teardown(mpack_reader_t* reader, mpack_reader_teardown_t teardown) {
reader->teardown = teardown;
}
/**
* @}
*/
/**
* @name Core Reader Functions
* @{
*/
/**
* Queries the error state of the MPack reader.
*
* If a reader is in an error state, you should discard all data since the
* last time the error flag was checked. The error flag cannot be cleared.
*/
MPACK_INLINE mpack_error_t mpack_reader_error(mpack_reader_t* reader) {
return reader->error;
}
/**
* Places the reader in the given error state, calling the error callback if one
* is set.
*
* This allows you to externally flag errors, for example if you are validating
* data as you read it.
*
* If the reader is already in an error state, this call is ignored and no
* error callback is called.
*/
void mpack_reader_flag_error(mpack_reader_t* reader, mpack_error_t error);
/**
* Places the reader in the given error state if the given error is not mpack_ok,
* returning the resulting error state of the reader.
*
* This allows you to externally flag errors, for example if you are validating
* data as you read it.
*
* If the given error is mpack_ok or if the reader is already in an error state,
* this call is ignored and the actual error state of the reader is returned.
*/
MPACK_INLINE mpack_error_t mpack_reader_flag_if_error(mpack_reader_t* reader, mpack_error_t error) {
if (error != mpack_ok)
mpack_reader_flag_error(reader, error);
return mpack_reader_error(reader);
}
/**
* Returns bytes left in the reader's buffer.
*
* If you are done reading MessagePack data but there is other interesting data
* following it, the reader may have buffered too much data. The number of bytes
* remaining in the buffer and a pointer to the position of those bytes can be
* queried here.
*
* If you know the length of the MPack chunk beforehand, it's better to instead
* have your fill function limit the data it reads so that the reader does not
* have extra data. In this case you can simply check that this returns zero.
*
* Returns 0 if the reader is in an error state.
*
* @param reader The MPack reader from which to query remaining data.
* @param data [out] A pointer to the remaining data, or NULL.
* @return The number of bytes remaining in the buffer.
*/
size_t mpack_reader_remaining(mpack_reader_t* reader, const char** data);
/**
* Reads a MessagePack object header (an MPack tag.)
*
* If an error occurs, the reader is placed in an error state and a
* nil tag is returned. If the reader is already in an error state,
* a nil tag is returned.
*
* If the type is compound (i.e. is a map, array, string, binary or
* extension type), additional reads are required to get the contained
* data, and the corresponding done function must be called when done.
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* @see mpack_read_bytes()
* @see mpack_done_array()
* @see mpack_done_map()
* @see mpack_done_str()
* @see mpack_done_bin()
* @see mpack_done_ext()
*/
mpack_tag_t mpack_read_tag(mpack_reader_t* reader);
/**
* Parses the next MessagePack object header (an MPack tag) without
* advancing the reader.
*
* If an error occurs, the reader is placed in an error state and a
* nil tag is returned. If the reader is already in an error state,
* a nil tag is returned.
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* @see mpack_read_tag()
* @see mpack_discard()
*/
mpack_tag_t mpack_peek_tag(mpack_reader_t* reader);
/**
* @}
*/
/**
* @name String and Data Functions
* @{
*/
/**
* Skips bytes from the underlying stream. This is used only to
* skip the contents of a string, binary blob or extension object.
*/
void mpack_skip_bytes(mpack_reader_t* reader, size_t count);
/**
* Reads bytes from a string, binary blob or extension object, copying
* them into the given buffer.
*
* A str, bin or ext must have been opened by a call to mpack_read_tag()
* which yielded one of these types, or by a call to an expect function
* such as mpack_expect_str() or mpack_expect_bin().
*
* If an error occurs, the buffer contents are undefined.
*
* This can be called multiple times for a single str, bin or ext
* to read the data in chunks. The total data read must add up
* to the size of the object.
*
* @param reader The MPack reader
* @param p The buffer in which to copy the bytes
* @param count The number of bytes to read
*/
void mpack_read_bytes(mpack_reader_t* reader, char* p, size_t count);
/**
* Reads bytes from a string, ensures that the string is valid UTF-8,
* and copies the bytes into the given buffer.
*
* A string must have been opened by a call to mpack_read_tag() which
* yielded a string, or by a call to an expect function such as
* mpack_expect_str().
*
* The given byte count must match the complete size of the string as
* returned by the tag or expect function. You must ensure that the
* buffer fits the data.
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed.
*
* If an error occurs, the buffer contents are undefined.
*
* Unlike mpack_read_bytes(), this cannot be used to read the data in
* chunks (since this might split a character's UTF-8 bytes, and the
* reader does not keep track of the UTF-8 decoding state between reads.)
*
* @throws mpack_error_type if the string contains invalid UTF-8.
*/
void mpack_read_utf8(mpack_reader_t* reader, char* p, size_t byte_count);
/**
* Reads bytes from a string, ensures that the string contains no NUL
* bytes, copies the bytes into the given buffer and adds a null-terminator.
*
* A string must have been opened by a call to mpack_read_tag() which
* yielded a string, or by a call to an expect function such as
* mpack_expect_str().
*
* The given byte count must match the size of the string as returned
* by the tag or expect function. The string will only be copied if
* the buffer is large enough to store it.
*
* If an error occurs, the buffer will contain an empty string.
*
* @note If you know the object will be a string before reading it,
* it is highly recommended to use mpack_expect_cstr() instead.
* Alternatively you could use mpack_peek_tag() and call
* mpack_expect_cstr() if it's a string.
*
* @throws mpack_error_too_big if the string plus null-terminator is larger than the given buffer size
* @throws mpack_error_type if the string contains a null byte.
*
* @see mpack_peek_tag()
* @see mpack_expect_cstr()
* @see mpack_expect_utf8_cstr()
*/
void mpack_read_cstr(mpack_reader_t* reader, char* buf, size_t buffer_size, size_t byte_count);
/**
* Reads bytes from a string, ensures that the string is valid UTF-8
* with no NUL bytes, copies the bytes into the given buffer and adds a
* null-terminator.
*
* A string must have been opened by a call to mpack_read_tag() which
* yielded a string, or by a call to an expect function such as
* mpack_expect_str().
*
* The given byte count must match the size of the string as returned
* by the tag or expect function. The string will only be copied if
* the buffer is large enough to store it.
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed, but without the NUL character, since
* it cannot be represented in a null-terminated string.
*
* If an error occurs, the buffer will contain an empty string.
*
* @note If you know the object will be a string before reading it,
* it is highly recommended to use mpack_expect_utf8_cstr() instead.
* Alternatively you could use mpack_peek_tag() and call
* mpack_expect_utf8_cstr() if it's a string.
*
* @throws mpack_error_too_big if the string plus null-terminator is larger than the given buffer size
* @throws mpack_error_type if the string contains invalid UTF-8 or a null byte.
*
* @see mpack_peek_tag()
* @see mpack_expect_utf8_cstr()
*/
void mpack_read_utf8_cstr(mpack_reader_t* reader, char* buf, size_t buffer_size, size_t byte_count);
#ifdef MPACK_MALLOC
/** @cond */
// This can optionally add a null-terminator, but it does not check
// whether the data contains null bytes. This must be done separately
// in a cstring read function (possibly as part of a UTF-8 check.)
char* mpack_read_bytes_alloc_impl(mpack_reader_t* reader, size_t count, bool null_terminated);
/** @endcond */
/**
* Reads bytes from a string, binary blob or extension object, allocating
* storage for them and returning the allocated pointer.
*
* The allocated string must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* Returns NULL if any error occurs, or if count is zero.
*/
MPACK_INLINE char* mpack_read_bytes_alloc(mpack_reader_t* reader, size_t count) {
return mpack_read_bytes_alloc_impl(reader, count, false);
}
#endif
/**
* Reads bytes from a string, binary blob or extension object in-place in
* the buffer. This can be used to avoid copying the data.
*
* A str, bin or ext must have been opened by a call to mpack_read_tag()
* which yielded one of these types, or by a call to an expect function
* such as mpack_expect_str() or mpack_expect_bin().
*
* If the bytes are from a string, the string is not null-terminated! Use
* mpack_read_cstr() to copy the string into a buffer and add a null-terminator.
*
* The returned pointer is invalidated on the next read, or when the buffer
* is destroyed.
*
* The reader will move data around in the buffer if needed to ensure that
* the pointer can always be returned, so this should only be used if
* count is very small compared to the buffer size. If you need to check
* whether a small size is reasonable (for example you intend to handle small and
* large sizes differently), you can call mpack_should_read_bytes_inplace().
*
* This can be called multiple times for a single str, bin or ext
* to read the data in chunks. The total data read must add up
* to the size of the object.
*
* NULL is returned if the reader is in an error state.
*
* @throws mpack_error_too_big if the requested size is larger than the buffer size
*
* @see mpack_should_read_bytes_inplace()
*/
const char* mpack_read_bytes_inplace(mpack_reader_t* reader, size_t count);
/**
* Reads bytes from a string in-place in the buffer and ensures they are
* valid UTF-8. This can be used to avoid copying the data.
*
* A string must have been opened by a call to mpack_read_tag() which
* yielded a string, or by a call to an expect function such as
* mpack_expect_str().
*
* The string is not null-terminated! Use mpack_read_utf8_cstr() to
* copy the string into a buffer and add a null-terminator.
*
* The returned pointer is invalidated on the next read, or when the buffer
* is destroyed.
*
* The reader will move data around in the buffer if needed to ensure that
* the pointer can always be returned, so this should only be used if
* count is very small compared to the buffer size. If you need to check
* whether a small size is reasonable (for example you intend to handle small and
* large sizes differently), you can call mpack_should_read_bytes_inplace().
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed.
*
* Unlike mpack_read_bytes_inplace(), this cannot be used to read the data in
* chunks (since this might split a character's UTF-8 bytes, and the
* reader does not keep track of the UTF-8 decoding state between reads.)
*
* NULL is returned if the reader is in an error state.
*
* @throws mpack_error_type if the string contains invalid UTF-8
* @throws mpack_error_too_big if the requested size is larger than the buffer size
*
* @see mpack_should_read_bytes_inplace()
*/
const char* mpack_read_utf8_inplace(mpack_reader_t* reader, size_t count);
/**
* Returns true if it's a good idea to read the given number of bytes
* in-place.
*
* If the read will be larger than some small fraction of the buffer size,
* this will return false to avoid shuffling too much data back and forth
* in the buffer.
*
* Use this if you're expecting arbitrary size data, and you want to read
* in-place for the best performance when possible but will fall back to
* a normal read if the data is too large.
*
* @see mpack_read_bytes_inplace()
*/
MPACK_INLINE bool mpack_should_read_bytes_inplace(mpack_reader_t* reader, size_t count) {
return (reader->size == 0 || count <= reader->size / MPACK_READER_SMALL_FRACTION_DENOMINATOR);
}
#if MPACK_EXTENSIONS
/**
* Reads a timestamp contained in an ext object of the given size, closing the
* ext type.
*
* An ext object of exttype @ref MPACK_EXTTYPE_TIMESTAMP must have been opened
* by a call to e.g. mpack_read_tag() or mpack_expect_ext().
*
* You must NOT call mpack_done_ext() after calling this. A timestamp ext
* object can only contain a single timestamp value, so this calls
* mpack_done_ext() automatically.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @throws mpack_error_invalid if the size is not one of the supported
* timestamp sizes, or if the nanoseconds are out of range.
*/
mpack_timestamp_t mpack_read_timestamp(mpack_reader_t* reader, size_t size);
#endif
/**
* @}
*/
/**
* @name Core Reader Functions
* @{
*/
#if MPACK_READ_TRACKING
/**
* Finishes reading the given type.
*
* This will track reads to ensure that the correct number of elements
* or bytes are read.
*/
void mpack_done_type(mpack_reader_t* reader, mpack_type_t type);
#else
MPACK_INLINE void mpack_done_type(mpack_reader_t* reader, mpack_type_t type) {
MPACK_UNUSED(reader);
MPACK_UNUSED(type);
}
#endif
/**
* Finishes reading an array.
*
* This will track reads to ensure that the correct number of elements are read.
*/
MPACK_INLINE void mpack_done_array(mpack_reader_t* reader) {
mpack_done_type(reader, mpack_type_array);
}
/**
* @fn mpack_done_map(mpack_reader_t* reader)
*
* Finishes reading a map.
*
* This will track reads to ensure that the correct number of elements are read.
*/
MPACK_INLINE void mpack_done_map(mpack_reader_t* reader) {
mpack_done_type(reader, mpack_type_map);
}
/**
* @fn mpack_done_str(mpack_reader_t* reader)
*
* Finishes reading a string.
*
* This will track reads to ensure that the correct number of bytes are read.
*/
MPACK_INLINE void mpack_done_str(mpack_reader_t* reader) {
mpack_done_type(reader, mpack_type_str);
}
/**
* @fn mpack_done_bin(mpack_reader_t* reader)
*
* Finishes reading a binary data blob.
*
* This will track reads to ensure that the correct number of bytes are read.
*/
MPACK_INLINE void mpack_done_bin(mpack_reader_t* reader) {
mpack_done_type(reader, mpack_type_bin);
}
#if MPACK_EXTENSIONS
/**
* @fn mpack_done_ext(mpack_reader_t* reader)
*
* Finishes reading an extended type binary data blob.
*
* This will track reads to ensure that the correct number of bytes are read.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
MPACK_INLINE void mpack_done_ext(mpack_reader_t* reader) {
mpack_done_type(reader, mpack_type_ext);
}
#endif
/**
* Reads and discards the next object. This will read and discard all
* contained data as well if it is a compound type.
*/
void mpack_discard(mpack_reader_t* reader);
/**
* @}
*/
/** @cond */
#if MPACK_DEBUG && MPACK_STDIO
/**
* @name Debugging Functions
* @{
*/
/*
* Converts a blob of MessagePack to a pseudo-JSON string for debugging
* purposes, placing the result in the given buffer with a null-terminator.
*
* If the buffer does not have enough space, the result will be truncated (but
* it is guaranteed to be null-terminated.)
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
void mpack_print_data_to_buffer(const char* data, size_t data_size, char* buffer, size_t buffer_size);
/*
* Converts a node to pseudo-JSON for debugging purposes, calling the given
* callback as many times as is necessary to output the character data.
*
* No null-terminator or trailing newline will be written.
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
void mpack_print_data_to_callback(const char* data, size_t size, mpack_print_callback_t callback, void* context);
/*
* Converts a blob of MessagePack to pseudo-JSON for debugging purposes
* and pretty-prints it to the given file.
*/
void mpack_print_data_to_file(const char* data, size_t len, FILE* file);
/*
* Converts a blob of MessagePack to pseudo-JSON for debugging purposes
* and pretty-prints it to stdout.
*/
MPACK_INLINE void mpack_print_data_to_stdout(const char* data, size_t len) {
mpack_print_data_to_file(data, len, stdout);
}
/*
* Converts the MessagePack contained in the given `FILE*` to pseudo-JSON for
* debugging purposes, calling the given callback as many times as is necessary
* to output the character data.
*/
void mpack_print_stdfile_to_callback(FILE* file, mpack_print_callback_t callback, void* context);
/*
* Deprecated.
*
* \deprecated Renamed to mpack_print_data_to_stdout().
*/
MPACK_INLINE void mpack_print(const char* data, size_t len) {
mpack_print_data_to_stdout(data, len);
}
/**
* @}
*/
#endif
/** @endcond */
/**
* @}
*/
#if MPACK_INTERNAL
bool mpack_reader_ensure_straddle(mpack_reader_t* reader, size_t count);
/*
* Ensures there are at least @c count bytes left in the
* data, raising an error and returning false if more
* data cannot be made available.
*/
MPACK_INLINE bool mpack_reader_ensure(mpack_reader_t* reader, size_t count) {
mpack_assert(count != 0, "cannot ensure zero bytes!");
mpack_assert(reader->error == mpack_ok, "reader cannot be in an error state!");
if (count <= (size_t)(reader->end - reader->data))
return true;
return mpack_reader_ensure_straddle(reader, count);
}
void mpack_read_native_straddle(mpack_reader_t* reader, char* p, size_t count);
// Reads count bytes into p, deferring to mpack_read_native_straddle() if more
// bytes are needed than are available in the buffer.
MPACK_INLINE void mpack_read_native(mpack_reader_t* reader, char* p, size_t count) {
mpack_assert(count == 0 || p != NULL, "data pointer for %i bytes is NULL", (int)count);
if (count > (size_t)(reader->end - reader->data)) {
mpack_read_native_straddle(reader, p, count);
} else {
mpack_memcpy(p, reader->data, count);
reader->data += count;
}
}
#if MPACK_READ_TRACKING
#define MPACK_READER_TRACK(reader, error_expr) \
(((reader)->error == mpack_ok) ? mpack_reader_flag_if_error((reader), (error_expr)) : (reader)->error)
#else
#define MPACK_READER_TRACK(reader, error_expr) (MPACK_UNUSED(reader), mpack_ok)
#endif
MPACK_INLINE mpack_error_t mpack_reader_track_element(mpack_reader_t* reader) {
return MPACK_READER_TRACK(reader, mpack_track_element(&reader->track, true));
}
MPACK_INLINE mpack_error_t mpack_reader_track_peek_element(mpack_reader_t* reader) {
return MPACK_READER_TRACK(reader, mpack_track_peek_element(&reader->track, true));
}
MPACK_INLINE mpack_error_t mpack_reader_track_bytes(mpack_reader_t* reader, uint64_t count) {
MPACK_UNUSED(count);
return MPACK_READER_TRACK(reader, mpack_track_bytes(&reader->track, true, count));
}
MPACK_INLINE mpack_error_t mpack_reader_track_str_bytes_all(mpack_reader_t* reader, uint64_t count) {
MPACK_UNUSED(count);
return MPACK_READER_TRACK(reader, mpack_track_str_bytes_all(&reader->track, true, count));
}
#endif
#endif
MPACK_HEADER_END
#endif
/* mpack/mpack-expect.h.h */
/**
* @file
*
* Declares the MPack static Expect API.
*/
#ifndef MPACK_EXPECT_H
#define MPACK_EXPECT_H 1
/* #include "mpack-reader.h" */
MPACK_HEADER_START
#if MPACK_EXPECT
#if !MPACK_READER
#error "MPACK_EXPECT requires MPACK_READER."
#endif
/**
* @defgroup expect Expect API
*
* The MPack Expect API allows you to easily read MessagePack data when you
* expect it to follow a predefined schema.
*
* @note If you are not writing code for an embedded device (or otherwise do
* not need maximum performance with minimal memory usage), you should not use
* this. You probably want to use the @link node Node API@endlink instead.
*
* See @ref docs/expect.md for examples.
*
* The main purpose of the Expect API is convenience, so the API is lax. It
* automatically converts between similar types where there is no loss of
* precision.
*
* When using any of the expect functions, if the type or value of what was
* read does not match what is expected, @ref mpack_error_type is raised.
*
* @{
*/
/**
* @name Basic Number Functions
* @{
*/
/**
* Reads an 8-bit unsigned integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an 8-bit unsigned int.
*
* Returns zero if an error occurs.
*/
uint8_t mpack_expect_u8(mpack_reader_t* reader);
/**
* Reads a 16-bit unsigned integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 16-bit unsigned int.
*
* Returns zero if an error occurs.
*/
uint16_t mpack_expect_u16(mpack_reader_t* reader);
/**
* Reads a 32-bit unsigned integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 32-bit unsigned int.
*
* Returns zero if an error occurs.
*/
uint32_t mpack_expect_u32(mpack_reader_t* reader);
/**
* Reads a 64-bit unsigned integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 64-bit unsigned int.
*
* Returns zero if an error occurs.
*/
uint64_t mpack_expect_u64(mpack_reader_t* reader);
/**
* Reads an 8-bit signed integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an 8-bit signed int.
*
* Returns zero if an error occurs.
*/
int8_t mpack_expect_i8(mpack_reader_t* reader);
/**
* Reads a 16-bit signed integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 16-bit signed int.
*
* Returns zero if an error occurs.
*/
int16_t mpack_expect_i16(mpack_reader_t* reader);
/**
* Reads a 32-bit signed integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 32-bit signed int.
*
* Returns zero if an error occurs.
*/
int32_t mpack_expect_i32(mpack_reader_t* reader);
/**
* Reads a 64-bit signed integer.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 64-bit signed int.
*
* Returns zero if an error occurs.
*/
int64_t mpack_expect_i64(mpack_reader_t* reader);
/**
* Reads a number, returning the value as a float. The underlying value can be an
* integer, float or double; the value is converted to a float.
*
* @note Reading a double or a large integer with this function can incur a
* loss of precision.
*
* @throws mpack_error_type if the underlying value is not a float, double or integer.
*/
float mpack_expect_float(mpack_reader_t* reader);
/**
* Reads a number, returning the value as a double. The underlying value can be an
* integer, float or double; the value is converted to a double.
*
* @note Reading a very large integer with this function can incur a
* loss of precision.
*
* @throws mpack_error_type if the underlying value is not a float, double or integer.
*/
double mpack_expect_double(mpack_reader_t* reader);
/**
* Reads a float. The underlying value must be a float, not a double or an integer.
* This ensures no loss of precision can occur.
*
* @throws mpack_error_type if the underlying value is not a float.
*/
float mpack_expect_float_strict(mpack_reader_t* reader);
/**
* Reads a double. The underlying value must be a float or double, not an integer.
* This ensures no loss of precision can occur.
*
* @throws mpack_error_type if the underlying value is not a float or double.
*/
double mpack_expect_double_strict(mpack_reader_t* reader);
/**
* @}
*/
/**
* @name Ranged Number Functions
* @{
*/
/**
* Reads an 8-bit unsigned integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an 8-bit unsigned int.
*
* Returns min_value if an error occurs.
*/
uint8_t mpack_expect_u8_range(mpack_reader_t* reader, uint8_t min_value, uint8_t max_value);
/**
* Reads a 16-bit unsigned integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 16-bit unsigned int.
*
* Returns min_value if an error occurs.
*/
uint16_t mpack_expect_u16_range(mpack_reader_t* reader, uint16_t min_value, uint16_t max_value);
/**
* Reads a 32-bit unsigned integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 32-bit unsigned int.
*
* Returns min_value if an error occurs.
*/
uint32_t mpack_expect_u32_range(mpack_reader_t* reader, uint32_t min_value, uint32_t max_value);
/**
* Reads a 64-bit unsigned integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 64-bit unsigned int.
*
* Returns min_value if an error occurs.
*/
uint64_t mpack_expect_u64_range(mpack_reader_t* reader, uint64_t min_value, uint64_t max_value);
/**
* Reads an unsigned integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an unsigned int.
*
* Returns min_value if an error occurs.
*/
MPACK_INLINE unsigned int mpack_expect_uint_range(mpack_reader_t* reader, unsigned int min_value, unsigned int max_value) {
// This should be true at compile-time, so this just wraps the 32-bit
// function. We fallback to 64-bit if for some reason sizeof(int) isn't 4.
if (sizeof(unsigned int) == 4)
return (unsigned int)mpack_expect_u32_range(reader, (uint32_t)min_value, (uint32_t)max_value);
return (unsigned int)mpack_expect_u64_range(reader, min_value, max_value);
}
/**
* Reads an 8-bit unsigned integer, ensuring that it is at most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an 8-bit unsigned int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE uint8_t mpack_expect_u8_max(mpack_reader_t* reader, uint8_t max_value) {
return mpack_expect_u8_range(reader, 0, max_value);
}
/**
* Reads a 16-bit unsigned integer, ensuring that it is at most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 16-bit unsigned int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE uint16_t mpack_expect_u16_max(mpack_reader_t* reader, uint16_t max_value) {
return mpack_expect_u16_range(reader, 0, max_value);
}
/**
* Reads a 32-bit unsigned integer, ensuring that it is at most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 32-bit unsigned int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE uint32_t mpack_expect_u32_max(mpack_reader_t* reader, uint32_t max_value) {
return mpack_expect_u32_range(reader, 0, max_value);
}
/**
* Reads a 64-bit unsigned integer, ensuring that it is at most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 64-bit unsigned int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE uint64_t mpack_expect_u64_max(mpack_reader_t* reader, uint64_t max_value) {
return mpack_expect_u64_range(reader, 0, max_value);
}
/**
* Reads an unsigned integer, ensuring that it is at most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an unsigned int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE unsigned int mpack_expect_uint_max(mpack_reader_t* reader, unsigned int max_value) {
return mpack_expect_uint_range(reader, 0, max_value);
}
/**
* Reads an 8-bit signed integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an 8-bit signed int.
*
* Returns min_value if an error occurs.
*/
int8_t mpack_expect_i8_range(mpack_reader_t* reader, int8_t min_value, int8_t max_value);
/**
* Reads a 16-bit signed integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 16-bit signed int.
*
* Returns min_value if an error occurs.
*/
int16_t mpack_expect_i16_range(mpack_reader_t* reader, int16_t min_value, int16_t max_value);
/**
* Reads a 32-bit signed integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 32-bit signed int.
*
* Returns min_value if an error occurs.
*/
int32_t mpack_expect_i32_range(mpack_reader_t* reader, int32_t min_value, int32_t max_value);
/**
* Reads a 64-bit signed integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 64-bit signed int.
*
* Returns min_value if an error occurs.
*/
int64_t mpack_expect_i64_range(mpack_reader_t* reader, int64_t min_value, int64_t max_value);
/**
* Reads a signed integer, ensuring that it falls within the given range.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a signed int.
*
* Returns min_value if an error occurs.
*/
MPACK_INLINE int mpack_expect_int_range(mpack_reader_t* reader, int min_value, int max_value) {
// This should be true at compile-time, so this just wraps the 32-bit
// function. We fallback to 64-bit if for some reason sizeof(int) isn't 4.
if (sizeof(int) == 4)
return (int)mpack_expect_i32_range(reader, (int32_t)min_value, (int32_t)max_value);
return (int)mpack_expect_i64_range(reader, min_value, max_value);
}
/**
* Reads an 8-bit signed integer, ensuring that it is at least zero and at
* most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an 8-bit signed int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE int8_t mpack_expect_i8_max(mpack_reader_t* reader, int8_t max_value) {
return mpack_expect_i8_range(reader, 0, max_value);
}
/**
* Reads a 16-bit signed integer, ensuring that it is at least zero and at
* most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 16-bit signed int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE int16_t mpack_expect_i16_max(mpack_reader_t* reader, int16_t max_value) {
return mpack_expect_i16_range(reader, 0, max_value);
}
/**
* Reads a 32-bit signed integer, ensuring that it is at least zero and at
* most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 32-bit signed int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE int32_t mpack_expect_i32_max(mpack_reader_t* reader, int32_t max_value) {
return mpack_expect_i32_range(reader, 0, max_value);
}
/**
* Reads a 64-bit signed integer, ensuring that it is at least zero and at
* most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a 64-bit signed int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE int64_t mpack_expect_i64_max(mpack_reader_t* reader, int64_t max_value) {
return mpack_expect_i64_range(reader, 0, max_value);
}
/**
* Reads an int, ensuring that it is at least zero and at most @a max_value.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a signed int.
*
* Returns 0 if an error occurs.
*/
MPACK_INLINE int mpack_expect_int_max(mpack_reader_t* reader, int max_value) {
return mpack_expect_int_range(reader, 0, max_value);
}
/**
* Reads a number, ensuring that it falls within the given range and returning
* the value as a float. The underlying value can be an integer, float or
* double; the value is converted to a float.
*
* @note Reading a double or a large integer with this function can incur a
* loss of precision.
*
* @throws mpack_error_type if the underlying value is not a float, double or integer.
*/
float mpack_expect_float_range(mpack_reader_t* reader, float min_value, float max_value);
/**
* Reads a number, ensuring that it falls within the given range and returning
* the value as a double. The underlying value can be an integer, float or
* double; the value is converted to a double.
*
* @note Reading a very large integer with this function can incur a
* loss of precision.
*
* @throws mpack_error_type if the underlying value is not a float, double or integer.
*/
double mpack_expect_double_range(mpack_reader_t* reader, double min_value, double max_value);
/**
* @}
*/
// These are additional Basic Number functions that wrap inline range functions.
/**
* @name Basic Number Functions
* @{
*/
/**
* Reads an unsigned int.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in an unsigned int.
*
* Returns zero if an error occurs.
*/
MPACK_INLINE unsigned int mpack_expect_uint(mpack_reader_t* reader) {
// This should be true at compile-time, so this just wraps the 32-bit function.
if (sizeof(unsigned int) == 4)
return (unsigned int)mpack_expect_u32(reader);
// Otherwise we wrap the max function to ensure it fits.
return (unsigned int)mpack_expect_u64_max(reader, UINT_MAX);
}
/**
* Reads a signed int.
*
* The underlying type may be an integer type of any size and signedness,
* as long as the value can be represented in a signed int.
*
* Returns zero if an error occurs.
*/
MPACK_INLINE int mpack_expect_int(mpack_reader_t* reader) {
// This should be true at compile-time, so this just wraps the 32-bit function.
if (sizeof(int) == 4)
return (int)mpack_expect_i32(reader);
// Otherwise we wrap the range function to ensure it fits.
return (int)mpack_expect_i64_range(reader, INT_MIN, INT_MAX);
}
/**
* @}
*/
/**
* @name Matching Number Functions
* @{
*/
/**
* Reads an unsigned integer, ensuring that it exactly matches the given value.
*
* mpack_error_type is raised if the value is not representable as an unsigned
* integer or if it does not exactly match the given value.
*/
void mpack_expect_uint_match(mpack_reader_t* reader, uint64_t value);
/**
* Reads a signed integer, ensuring that it exactly matches the given value.
*
* mpack_error_type is raised if the value is not representable as a signed
* integer or if it does not exactly match the given value.
*/
void mpack_expect_int_match(mpack_reader_t* reader, int64_t value);
/**
* @name Other Basic Types
* @{
*/
/**
* Reads a nil, raising @ref mpack_error_type if the value is not nil.
*/
void mpack_expect_nil(mpack_reader_t* reader);
/**
* Reads a boolean.
*
* @note Integers will raise mpack_error_type; the value must be strictly a boolean.
*/
bool mpack_expect_bool(mpack_reader_t* reader);
/**
* Reads a boolean, raising @ref mpack_error_type if its value is not @c true.
*/
void mpack_expect_true(mpack_reader_t* reader);
/**
* Reads a boolean, raising @ref mpack_error_type if its value is not @c false.
*/
void mpack_expect_false(mpack_reader_t* reader);
/**
* @}
*/
/**
* @name Extension Functions
* @{
*/
#if MPACK_EXTENSIONS
/**
* Reads a timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
mpack_timestamp_t mpack_expect_timestamp(mpack_reader_t* reader);
/**
* Reads a timestamp in seconds, truncating the nanoseconds (if any).
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
int64_t mpack_expect_timestamp_truncate(mpack_reader_t* reader);
#endif
/**
* @}
*/
/**
* @name Compound Types
* @{
*/
/**
* Reads the start of a map, returning its element count.
*
* A number of values follow equal to twice the element count of the map,
* alternating between keys and values. @ref mpack_done_map() must be called
* once all elements have been read.
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* @warning This call is dangerous! It does not have a size limit, and it
* does not have any way of checking whether there is enough data in the
* message (since the data could be coming from a stream.) When looping
* through the map's contents, you must check for errors on each iteration
* of the loop. Otherwise an attacker could craft a message declaring a map
* of a billion elements which would throw your parsing code into an
* infinite loop! You should strongly consider using mpack_expect_map_max()
* with a safe maximum size instead.
*
* @throws mpack_error_type if the value is not a map.
*/
uint32_t mpack_expect_map(mpack_reader_t* reader);
/**
* Reads the start of a map with a number of elements in the given range, returning
* its element count.
*
* A number of values follow equal to twice the element count of the map,
* alternating between keys and values. @ref mpack_done_map() must be called
* once all elements have been read.
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* min_count is returned if an error occurs.
*
* @throws mpack_error_type if the value is not a map or if its size does
* not fall within the given range.
*/
uint32_t mpack_expect_map_range(mpack_reader_t* reader, uint32_t min_count, uint32_t max_count);
/**
* Reads the start of a map with a number of elements at most @a max_count,
* returning its element count.
*
* A number of values follow equal to twice the element count of the map,
* alternating between keys and values. @ref mpack_done_map() must be called
* once all elements have been read.
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* Zero is returned if an error occurs.
*
* @throws mpack_error_type if the value is not a map or if its size is
* greater than max_count.
*/
MPACK_INLINE uint32_t mpack_expect_map_max(mpack_reader_t* reader, uint32_t max_count) {
return mpack_expect_map_range(reader, 0, max_count);
}
/**
* Reads the start of a map of the exact size given.
*
* A number of values follow equal to twice the element count of the map,
* alternating between keys and values. @ref mpack_done_map() must be called
* once all elements have been read.
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* @throws mpack_error_type if the value is not a map or if its size
* does not match the given count.
*/
void mpack_expect_map_match(mpack_reader_t* reader, uint32_t count);
/**
* Reads a nil node or the start of a map, returning whether a map was
* read and placing its number of key/value pairs in count.
*
* If a map was read, a number of values follow equal to twice the element count
* of the map, alternating between keys and values. @ref mpack_done_map() should
* also be called once all elements have been read (only if a map was read.)
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON.
*
* @warning This call is dangerous! It does not have a size limit, and it
* does not have any way of checking whether there is enough data in the
* message (since the data could be coming from a stream.) When looping
* through the map's contents, you must check for errors on each iteration
* of the loop. Otherwise an attacker could craft a message declaring a map
* of a billion elements which would throw your parsing code into an
* infinite loop! You should strongly consider using mpack_expect_map_max_or_nil()
* with a safe maximum size instead.
*
* @returns @c true if a map was read successfully; @c false if nil was read
* or an error occured.
* @throws mpack_error_type if the value is not a nil or map.
*/
bool mpack_expect_map_or_nil(mpack_reader_t* reader, uint32_t* count);
/**
* Reads a nil node or the start of a map with a number of elements at most
* max_count, returning whether a map was read and placing its number of
* key/value pairs in count.
*
* If a map was read, a number of values follow equal to twice the element count
* of the map, alternating between keys and values. @ref mpack_done_map() should
* anlso be called once all elements have been read (only if a map was read.)
*
* @note Maps in JSON are unordered, so it is recommended not to expect
* a specific ordering for your map values in case your data is converted
* to/from JSON. Consider using mpack_expect_key_cstr() or mpack_expect_key_uint()
* to switch on the key; see @ref docs/expect.md for examples.
*
* @returns @c true if a map was read successfully; @c false if nil was read
* or an error occured.
* @throws mpack_error_type if the value is not a nil or map.
*/
bool mpack_expect_map_max_or_nil(mpack_reader_t* reader, uint32_t max_count, uint32_t* count);
/**
* Reads the start of an array, returning its element count.
*
* A number of values follow equal to the element count of the array.
* @ref mpack_done_array() must be called once all elements have been read.
*
* @warning This call is dangerous! It does not have a size limit, and it
* does not have any way of checking whether there is enough data in the
* message (since the data could be coming from a stream.) When looping
* through the array's contents, you must check for errors on each iteration
* of the loop. Otherwise an attacker could craft a message declaring an array
* of a billion elements which would throw your parsing code into an
* infinite loop! You should strongly consider using mpack_expect_array_max()
* with a safe maximum size instead.
*/
uint32_t mpack_expect_array(mpack_reader_t* reader);
/**
* Reads the start of an array with a number of elements in the given range,
* returning its element count.
*
* A number of values follow equal to the element count of the array.
* @ref mpack_done_array() must be called once all elements have been read.
*
* min_count is returned if an error occurs.
*
* @throws mpack_error_type if the value is not an array or if its size does
* not fall within the given range.
*/
uint32_t mpack_expect_array_range(mpack_reader_t* reader, uint32_t min_count, uint32_t max_count);
/**
* Reads the start of an array with a number of elements at most @a max_count,
* returning its element count.
*
* A number of values follow equal to the element count of the array.
* @ref mpack_done_array() must be called once all elements have been read.
*
* Zero is returned if an error occurs.
*
* @throws mpack_error_type if the value is not an array or if its size is
* greater than max_count.
*/
MPACK_INLINE uint32_t mpack_expect_array_max(mpack_reader_t* reader, uint32_t max_count) {
return mpack_expect_array_range(reader, 0, max_count);
}
/**
* Reads the start of an array of the exact size given.
*
* A number of values follow equal to the element count of the array.
* @ref mpack_done_array() must be called once all elements have been read.
*
* @throws mpack_error_type if the value is not an array or if its size does
* not match the given count.
*/
void mpack_expect_array_match(mpack_reader_t* reader, uint32_t count);
/**
* Reads a nil node or the start of an array, returning whether an array was
* read and placing its number of elements in count.
*
* If an array was read, a number of values follow equal to the element count
* of the array. @ref mpack_done_array() should also be called once all elements
* have been read (only if an array was read.)
*
* @warning This call is dangerous! It does not have a size limit, and it
* does not have any way of checking whether there is enough data in the
* message (since the data could be coming from a stream.) When looping
* through the array's contents, you must check for errors on each iteration
* of the loop. Otherwise an attacker could craft a message declaring an array
* of a billion elements which would throw your parsing code into an
* infinite loop! You should strongly consider using mpack_expect_array_max_or_nil()
* with a safe maximum size instead.
*
* @returns @c true if an array was read successfully; @c false if nil was read
* or an error occured.
* @throws mpack_error_type if the value is not a nil or array.
*/
bool mpack_expect_array_or_nil(mpack_reader_t* reader, uint32_t* count);
/**
* Reads a nil node or the start of an array with a number of elements at most
* max_count, returning whether an array was read and placing its number of
* key/value pairs in count.
*
* If an array was read, a number of values follow equal to the element count
* of the array. @ref mpack_done_array() should also be called once all elements
* have been read (only if an array was read.)
*
* @returns @c true if an array was read successfully; @c false if nil was read
* or an error occured.
* @throws mpack_error_type if the value is not a nil or array.
*/
bool mpack_expect_array_max_or_nil(mpack_reader_t* reader, uint32_t max_count, uint32_t* count);
#ifdef MPACK_MALLOC
/**
* @hideinitializer
*
* Reads the start of an array and allocates storage for it, placing its
* size in out_count. A number of objects follow equal to the element count
* of the array. You must call @ref mpack_done_array() when done (even
* if the element count is zero.)
*
* If an error occurs, NULL is returned and the reader is placed in an
* error state.
*
* If the count is zero, NULL is returned. This does not indicate error.
* You should not check the return value for NULL to check for errors; only
* check the reader's error state.
*
* The allocated array must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @throws mpack_error_type if the value is not an array or if its size is
* greater than max_count.
*/
#define mpack_expect_array_alloc(reader, Type, max_count, out_count) \
((Type*)mpack_expect_array_alloc_impl(reader, sizeof(Type), max_count, out_count, false))
/**
* @hideinitializer
*
* Reads a nil node or the start of an array and allocates storage for it,
* placing its size in out_count. A number of objects follow equal to the element
* count of the array if a non-empty array was read.
*
* If an error occurs, NULL is returned and the reader is placed in an
* error state.
*
* If a nil node was read, NULL is returned. If an empty array was read,
* mpack_done_array() is called automatically and NULL is returned. These
* do not indicate error. You should not check the return value for NULL
* to check for errors; only check the reader's error state.
*
* The allocated array must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @warning You must call @ref mpack_done_array() if and only if a non-zero
* element count is read. This function does not differentiate between nil
* and an empty array.
*
* @throws mpack_error_type if the value is not an array or if its size is
* greater than max_count.
*/
#define mpack_expect_array_or_nil_alloc(reader, Type, max_count, out_count) \
((Type*)mpack_expect_array_alloc_impl(reader, sizeof(Type), max_count, out_count, true))
#endif
/**
* @}
*/
/** @cond */
#ifdef MPACK_MALLOC
void* mpack_expect_array_alloc_impl(mpack_reader_t* reader,
size_t element_size, uint32_t max_count, uint32_t* out_count, bool allow_nil);
#endif
/** @endcond */
/**
* @name String Functions
* @{
*/
/**
* Reads the start of a string, returning its size in bytes.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). mpack_done_str() must be called
* once all bytes have been read.
*
* NUL bytes are allowed in the string, and no encoding checks are done.
*
* mpack_error_type is raised if the value is not a string.
*/
uint32_t mpack_expect_str(mpack_reader_t* reader);
/**
* Reads a string of at most the given size, writing it into the
* given buffer and returning its size in bytes.
*
* This does not add a null-terminator! Use mpack_expect_cstr() to
* add a null-terminator.
*
* NUL bytes are allowed in the string, and no encoding checks are done.
*/
size_t mpack_expect_str_buf(mpack_reader_t* reader, char* buf, size_t bufsize);
/**
* Reads a string into the given buffer, ensuring it is a valid UTF-8 string
* and returning its size in bytes.
*
* This does not add a null-terminator! Use mpack_expect_utf8_cstr() to
* add a null-terminator.
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed.
*
* NUL bytes are allowed in the string (as they are in UTF-8.)
*
* Raises mpack_error_too_big if there is not enough room for the string.
* Raises mpack_error_type if the value is not a string or is not a valid UTF-8 string.
*/
size_t mpack_expect_utf8(mpack_reader_t* reader, char* buf, size_t bufsize);
/**
* Reads the start of a string, raising an error if its length is not
* at most the given number of bytes (not including any null-terminator.)
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_str() must be called
* once all bytes have been read.
*
* @throws mpack_error_type If the value is not a string.
* @throws mpack_error_too_big If the string's length in bytes is larger than the given maximum size.
*/
MPACK_INLINE uint32_t mpack_expect_str_max(mpack_reader_t* reader, uint32_t maxsize) {
uint32_t length = mpack_expect_str(reader);
if (length > maxsize) {
mpack_reader_flag_error(reader, mpack_error_too_big);
return 0;
}
return length;
}
/**
* Reads the start of a string, raising an error if its length is not
* exactly the given number of bytes (not including any null-terminator.)
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_str() must be called
* once all bytes have been read.
*
* mpack_error_type is raised if the value is not a string or if its
* length does not match.
*/
MPACK_INLINE void mpack_expect_str_length(mpack_reader_t* reader, uint32_t count) {
if (mpack_expect_str(reader) != count)
mpack_reader_flag_error(reader, mpack_error_type);
}
/**
* Reads a string, ensuring it exactly matches the given string.
*
* Remember that maps are unordered in JSON. Don't use this for map keys
* unless the map has only a single key!
*/
void mpack_expect_str_match(mpack_reader_t* reader, const char* str, size_t length);
/**
* Reads a string into the given buffer, ensures it has no null bytes,
* and adds a null-terminator at the end.
*
* Raises mpack_error_too_big if there is not enough room for the string and null-terminator.
* Raises mpack_error_type if the value is not a string or contains a null byte.
*/
void mpack_expect_cstr(mpack_reader_t* reader, char* buf, size_t size);
/**
* Reads a string into the given buffer, ensures it is a valid UTF-8 string
* without NUL characters, and adds a null-terminator at the end.
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed, but without the NUL character, since
* it cannot be represented in a null-terminated string.
*
* Raises mpack_error_too_big if there is not enough room for the string and null-terminator.
* Raises mpack_error_type if the value is not a string or is not a valid UTF-8 string.
*/
void mpack_expect_utf8_cstr(mpack_reader_t* reader, char* buf, size_t size);
#ifdef MPACK_MALLOC
/**
* Reads a string with the given total maximum size (including space for a
* null-terminator), allocates storage for it, ensures it has no null-bytes,
* and adds a null-terminator at the end. You assume ownership of the
* returned pointer if reading succeeds.
*
* The allocated string must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @throws mpack_error_too_big If the string plus null-terminator is larger than the given maxsize.
* @throws mpack_error_type If the value is not a string or contains a null byte.
*/
char* mpack_expect_cstr_alloc(mpack_reader_t* reader, size_t maxsize);
/**
* Reads a string with the given total maximum size (including space for a
* null-terminator), allocates storage for it, ensures it is valid UTF-8
* with no null-bytes, and adds a null-terminator at the end. You assume
* ownership of the returned pointer if reading succeeds.
*
* The length in bytes of the string, not including the null-terminator,
* will be written to size.
*
* This does not accept any UTF-8 variant such as Modified UTF-8, CESU-8 or
* WTF-8. Only pure UTF-8 is allowed, but without the NUL character, since
* it cannot be represented in a null-terminated string.
*
* The allocated string must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
* if you want a null-terminator.
*
* @throws mpack_error_too_big If the string plus null-terminator is larger
* than the given maxsize.
* @throws mpack_error_type If the value is not a string or contains
* invalid UTF-8 or a null byte.
*/
char* mpack_expect_utf8_cstr_alloc(mpack_reader_t* reader, size_t maxsize);
#endif
/**
* Reads a string, ensuring it exactly matches the given null-terminated
* string.
*
* Remember that maps are unordered in JSON. Don't use this for map keys
* unless the map has only a single key!
*/
MPACK_INLINE void mpack_expect_cstr_match(mpack_reader_t* reader, const char* cstr) {
mpack_assert(cstr != NULL, "cstr pointer is NULL");
mpack_expect_str_match(reader, cstr, mpack_strlen(cstr));
}
/**
* @}
*/
/**
* @name Binary Data
* @{
*/
/**
* Reads the start of a binary blob, returning its size in bytes.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_bin() must be called
* once all bytes have been read.
*
* mpack_error_type is raised if the value is not a binary blob.
*/
uint32_t mpack_expect_bin(mpack_reader_t* reader);
/**
* Reads the start of a binary blob, raising an error if its length is not
* at most the given number of bytes.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_bin() must be called
* once all bytes have been read.
*
* mpack_error_type is raised if the value is not a binary blob or if its
* length does not match.
*/
MPACK_INLINE uint32_t mpack_expect_bin_max(mpack_reader_t* reader, uint32_t maxsize) {
uint32_t length = mpack_expect_bin(reader);
if (length > maxsize) {
mpack_reader_flag_error(reader, mpack_error_type);
return 0;
}
return length;
}
/**
* Reads the start of a binary blob, raising an error if its length is not
* exactly the given number of bytes.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_bin() must be called
* once all bytes have been read.
*
* mpack_error_type is raised if the value is not a binary blob or if its
* length does not match.
*/
MPACK_INLINE void mpack_expect_bin_size(mpack_reader_t* reader, uint32_t count) {
if (mpack_expect_bin(reader) != count)
mpack_reader_flag_error(reader, mpack_error_type);
}
/**
* Reads a binary blob into the given buffer, returning its size in bytes.
*
* For compatibility, this will accept if the underlying type is string or
* binary (since in MessagePack 1.0, strings and binary data were combined
* under the "raw" type which became string in 1.1.)
*/
size_t mpack_expect_bin_buf(mpack_reader_t* reader, char* buf, size_t size);
/**
* Reads a binary blob with the given total maximum size, allocating storage for it.
*/
char* mpack_expect_bin_alloc(mpack_reader_t* reader, size_t maxsize, size_t* size);
/**
* @}
*/
/**
* @name Extension Functions
* @{
*/
#if MPACK_EXTENSIONS
/**
* Reads the start of an extension blob, returning its size in bytes and
* placing the type into @p type.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_ext() must be called
* once all bytes have been read.
*
* @p type will be a user-defined type in the range [0,127] or a reserved type
* in the range [-128,-2].
*
* mpack_error_type is raised if the value is not an extension blob. The @p
* type value is zero if an error occurs.
*
* @note This cannot be used to match a timestamp. @ref mpack_error_type will
* be flagged if the value is a timestamp. Use mpack_expect_timestamp() or
* mpack_expect_timestamp_truncate() instead.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @warning Be careful when using reserved types. They may no longer be ext
* types in the future, and previously valid data containing reserved types may
* become invalid in the future.
*/
uint32_t mpack_expect_ext(mpack_reader_t* reader, int8_t* type);
/**
* Reads the start of an extension blob, raising an error if its length is not
* at most the given number of bytes and placing the type into @p type.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_ext() must be called
* once all bytes have been read.
*
* mpack_error_type is raised if the value is not an extension blob or if its
* length does not match. The @p type value is zero if an error is raised.
*
* @p type will be a user-defined type in the range [0,127] or a reserved type
* in the range [-128,-2].
*
* @note This cannot be used to match a timestamp. @ref mpack_error_type will
* be flagged if the value is a timestamp. Use mpack_expect_timestamp() or
* mpack_expect_timestamp_truncate() instead.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @warning Be careful when using reserved types. They may no longer be ext
* types in the future, and previously valid data containing reserved types may
* become invalid in the future.
*
* @see mpack_expect_ext()
*/
MPACK_INLINE uint32_t mpack_expect_ext_max(mpack_reader_t* reader, int8_t* type, uint32_t maxsize) {
uint32_t length = mpack_expect_ext(reader, type);
if (length > maxsize) {
mpack_reader_flag_error(reader, mpack_error_type);
return 0;
}
return length;
}
/**
* Reads the start of an extension blob, raising an error if its length is not
* exactly the given number of bytes and placing the type into @p type.
*
* The bytes follow and must be read separately with mpack_read_bytes()
* or mpack_read_bytes_inplace(). @ref mpack_done_ext() must be called
* once all bytes have been read.
*
* mpack_error_type is raised if the value is not an extension blob or if its
* length does not match. The @p type value is zero if an error is raised.
*
* @p type will be a user-defined type in the range [0,127] or a reserved type
* in the range [-128,-2].
*
* @note This cannot be used to match a timestamp. @ref mpack_error_type will
* be flagged if the value is a timestamp. Use mpack_expect_timestamp() or
* mpack_expect_timestamp_truncate() instead.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @warning Be careful when using reserved types. They may no longer be ext
* types in the future, and previously valid data containing reserved types may
* become invalid in the future.
*
* @see mpack_expect_ext()
*/
MPACK_INLINE void mpack_expect_ext_size(mpack_reader_t* reader, int8_t* type, uint32_t count) {
if (mpack_expect_ext(reader, type) != count) {
*type = 0;
mpack_reader_flag_error(reader, mpack_error_type);
}
}
/**
* Reads an extension blob into the given buffer, returning its size in bytes
* and placing the type into @p type.
*
* mpack_error_type is raised if the value is not an extension blob or if its
* length does not match. The @p type value is zero if an error is raised.
*
* @p type will be a user-defined type in the range [0,127] or a reserved type
* in the range [-128,-2].
*
* @note This cannot be used to match a timestamp. @ref mpack_error_type will
* be flagged if the value is a timestamp. Use mpack_expect_timestamp() or
* mpack_expect_timestamp_truncate() instead.
*
* @warning Be careful when using reserved types. They may no longer be ext
* types in the future, and previously valid data containing reserved types may
* become invalid in the future.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @see mpack_expect_ext()
*/
size_t mpack_expect_ext_buf(mpack_reader_t* reader, int8_t* type, char* buf, size_t size);
#endif
#if MPACK_EXTENSIONS && defined(MPACK_MALLOC)
/**
* Reads an extension blob with the given total maximum size, allocating
* storage for it, and placing the type into @p type.
*
* mpack_error_type is raised if the value is not an extension blob or if its
* length does not match. The @p type value is zero if an error is raised.
*
* @p type will be a user-defined type in the range [0,127] or a reserved type
* in the range [-128,-2].
*
* @note This cannot be used to match a timestamp. @ref mpack_error_type will
* be flagged if the value is a timestamp. Use mpack_expect_timestamp() or
* mpack_expect_timestamp_truncate() instead.
*
* @warning Be careful when using reserved types. They may no longer be ext
* types in the future, and previously valid data containing reserved types may
* become invalid in the future.
*
* @note This requires @ref MPACK_EXTENSIONS and @ref MPACK_MALLOC.
*
* @see mpack_expect_ext()
*/
char* mpack_expect_ext_alloc(mpack_reader_t* reader, int8_t* type, size_t maxsize, size_t* size);
#endif
/**
* @}
*/
/**
* @name Special Functions
* @{
*/
/**
* Reads a MessagePack object header (an MPack tag), expecting it to exactly
* match the given tag.
*
* If the type is compound (i.e. is a map, array, string, binary or
* extension type), additional reads are required to get the contained
* data, and the corresponding done function must be called when done.
*
* @throws mpack_error_type if the tag does not match
*
* @see mpack_read_bytes()
* @see mpack_done_array()
* @see mpack_done_map()
* @see mpack_done_str()
* @see mpack_done_bin()
* @see mpack_done_ext()
*/
void mpack_expect_tag(mpack_reader_t* reader, mpack_tag_t tag);
/**
* Expects a string matching one of the strings in the given array,
* returning its array index.
*
* If the value does not match any of the given strings,
* @ref mpack_error_type is flagged. Use mpack_expect_enum_optional()
* if you want to allow other values than the given strings.
*
* If any error occurs or the reader is in an error state, @a count
* is returned.
*
* This can be used to quickly parse a string into an enum when the
* enum values range from 0 to @a count-1. If the last value in the
* enum is a special "count" value, it can be passed as the count,
* and the return value can be cast directly to the enum type.
*
* @code{.c}
* typedef enum { APPLE , BANANA , ORANGE , COUNT} fruit_t;
* const char* fruits[] = {"apple", "banana", "orange"};
*
* fruit_t fruit = (fruit_t)mpack_expect_enum(reader, fruits, COUNT);
* @endcode
*
* See @ref docs/expect.md for more examples.
*
* The maximum string length is the size of the buffer (strings are read in-place.)
*
* @param reader The reader
* @param strings An array of expected strings of length count
* @param count The number of strings
* @return The index of the matched string, or @a count in case of error
*/
size_t mpack_expect_enum(mpack_reader_t* reader, const char* strings[], size_t count);
/**
* Expects a string matching one of the strings in the given array
* returning its array index, or @a count if no strings match.
*
* If the value is not a string, or it does not match any of the
* given strings, @a count is returned and no error is flagged.
*
* If any error occurs or the reader is in an error state, @a count
* is returned.
*
* This can be used to quickly parse a string into an enum when the
* enum values range from 0 to @a count-1. If the last value in the
* enum is a special "count" value, it can be passed as the count,
* and the return value can be cast directly to the enum type.
*
* @code{.c}
* typedef enum { APPLE , BANANA , ORANGE , COUNT} fruit_t;
* const char* fruits[] = {"apple", "banana", "orange"};
*
* fruit_t fruit = (fruit_t)mpack_expect_enum_optional(reader, fruits, COUNT);
* @endcode
*
* See @ref docs/expect.md for more examples.
*
* The maximum string length is the size of the buffer (strings are read in-place.)
*
* @param reader The reader
* @param strings An array of expected strings of length count
* @param count The number of strings
*
* @return The index of the matched string, or @a count if it does not
* match or an error occurs
*/
size_t mpack_expect_enum_optional(mpack_reader_t* reader, const char* strings[], size_t count);
/**
* Expects an unsigned integer map key between 0 and count-1, marking it
* as found in the given bool array and returning it.
*
* This is a helper for switching among int keys in a map. It is
* typically used with an enum to define the key values. It should
* be called in the expression of a switch() statement. See @ref
* docs/expect.md for an example.
*
* The found array must be cleared before expecting the first key. If the
* flag for a given key is already set when found (i.e. the map contains a
* duplicate key), mpack_error_invalid is flagged.
*
* If the key is not a non-negative integer, or if the key is @a count or
* larger, @a count is returned and no error is flagged. If you want an error
* on unrecognized keys, flag an error in the default case in your switch;
* otherwise you must call mpack_discard() to discard its content.
*
* @param reader The reader
* @param found An array of bool flags of length count
* @param count The number of values in the found array, and one more than the
* maximum allowed key
*
* @see @ref docs/expect.md
*/
size_t mpack_expect_key_uint(mpack_reader_t* reader, bool found[], size_t count);
/**
* Expects a string map key matching one of the strings in the given key list,
* marking it as found in the given bool array and returning its index.
*
* This is a helper for switching among string keys in a map. It is
* typically used with an enum with names matching the strings in the
* array to define the key indices. It should be called in the expression
* of a switch() statement. See @ref docs/expect.md for an example.
*
* The found array must be cleared before expecting the first key. If the
* flag for a given key is already set when found (i.e. the map contains a
* duplicate key), mpack_error_invalid is flagged.
*
* If the key is unrecognized, count is returned and no error is flagged. If
* you want an error on unrecognized keys, flag an error in the default case
* in your switch; otherwise you must call mpack_discard() to discard its content.
*
* The maximum key length is the size of the buffer (keys are read in-place.)
*
* @param reader The reader
* @param keys An array of expected string keys of length count
* @param found An array of bool flags of length count
* @param count The number of values in the keys and found arrays
*
* @see @ref docs/expect.md
*/
size_t mpack_expect_key_cstr(mpack_reader_t* reader, const char* keys[],
bool found[], size_t count);
/**
* @}
*/
/**
* @}
*/
#endif
MPACK_HEADER_END
#endif
/* mpack/mpack-node.h.h */
/**
* @file
*
* Declares the MPack dynamic Node API.
*/
#ifndef MPACK_NODE_H
#define MPACK_NODE_H 1
/* #include "mpack-reader.h" */
MPACK_HEADER_START
#if MPACK_NODE
/**
* @defgroup node Node API
*
* The MPack Node API allows you to parse a chunk of MessagePack into a
* dynamically typed data structure, providing random access to the parsed
* data.
*
* See @ref docs/node.md for examples.
*
* @{
*/
/**
* A handle to node data in a parsed MPack tree.
*
* Nodes represent either primitive values or compound types. If a
* node is a compound type, it contains a pointer to its child nodes,
* or a pointer to its underlying data.
*
* Nodes are immutable.
*
* @note @ref mpack_node_t is an opaque reference to the node data, not the
* node data itself. (It contains pointers to both the node data and the tree.)
* It is passed by value in the Node API.
*/
typedef struct mpack_node_t mpack_node_t;
/**
* The storage for nodes in an MPack tree.
*
* You only need to use this if you intend to provide your own storage
* for nodes instead of letting the tree allocate it.
*
* @ref mpack_node_data_t is 16 bytes on most common architectures (32-bit
* and 64-bit.)
*/
typedef struct mpack_node_data_t mpack_node_data_t;
/**
* An MPack tree parser to parse a blob or stream of MessagePack.
*
* When a message is parsed, the tree contains a single root node which
* contains all parsed data. The tree and its nodes are immutable.
*/
typedef struct mpack_tree_t mpack_tree_t;
/**
* An error handler function to be called when an error is flagged on
* the tree.
*
* The error handler will only be called once on the first error flagged;
* any subsequent node reads and errors are ignored, and the tree is
* permanently in that error state.
*
* MPack is safe against non-local jumps out of error handler callbacks.
* This means you are allowed to longjmp or throw an exception (in C++,
* Objective-C, or with SEH) out of this callback.
*
* Bear in mind when using longjmp that local non-volatile variables that
* have changed are undefined when setjmp() returns, so you can't put the
* tree on the stack in the same activation frame as the setjmp without
* declaring it volatile.
*
* You must still eventually destroy the tree. It is not destroyed
* automatically when an error is flagged. It is safe to destroy the
* tree within this error callback, but you will either need to perform
* a non-local jump, or store something in your context to identify
* that the tree is destroyed since any future accesses to it cause
* undefined behavior.
*/
typedef void (*mpack_tree_error_t)(mpack_tree_t* tree, mpack_error_t error);
/**
* The MPack tree's read function. It should fill the buffer with as many bytes
* as are immediately available up to the given @c count, returning the number
* of bytes written to the buffer.
*
* In case of error, it should flag an appropriate error on the reader
* (usually @ref mpack_error_io.)
*
* The blocking or non-blocking behaviour of the read should match whether you
* are using mpack_tree_parse() or mpack_tree_try_parse().
*
* If you are using mpack_tree_parse(), the read should block until at least
* one byte is read. If you return 0, mpack_tree_parse() will raise @ref
* mpack_error_io.
*
* If you are using mpack_tree_try_parse(), the read function can always
* return 0, and must never block waiting for data (otherwise
* mpack_tree_try_parse() would be equivalent to mpack_tree_parse().)
* When you return 0, mpack_tree_try_parse() will return false without flagging
* an error.
*/
typedef size_t (*mpack_tree_read_t)(mpack_tree_t* tree, char* buffer, size_t count);
/**
* A teardown function to be called when the tree is destroyed.
*/
typedef void (*mpack_tree_teardown_t)(mpack_tree_t* tree);
/* Hide internals from documentation */
/** @cond */
struct mpack_node_t {
mpack_node_data_t* data;
mpack_tree_t* tree;
};
struct mpack_node_data_t {
mpack_type_t type;
/*
* The element count if the type is an array;
* the number of key/value pairs if the type is map;
* or the number of bytes if the type is str, bin or ext.
*/
uint32_t len;
union
{
bool b; /* The value if the type is bool. */
float f; /* The value if the type is float. */
double d; /* The value if the type is double. */
int64_t i; /* The value if the type is signed int. */
uint64_t u; /* The value if the type is unsigned int. */
size_t offset; /* The byte offset for str, bin and ext */
mpack_node_data_t* children; /* The children for map or array */
} value;
};
typedef struct mpack_tree_page_t {
struct mpack_tree_page_t* next;
mpack_node_data_t nodes[1]; // variable size
} mpack_tree_page_t;
typedef enum mpack_tree_parse_state_t {
mpack_tree_parse_state_not_started,
mpack_tree_parse_state_in_progress,
mpack_tree_parse_state_parsed,
} mpack_tree_parse_state_t;
typedef struct mpack_level_t {
mpack_node_data_t* child;
size_t left; // children left in level
} mpack_level_t;
typedef struct mpack_tree_parser_t {
mpack_tree_parse_state_t state;
// We keep track of the number of "possible nodes" left in the data rather
// than the number of bytes.
//
// When a map or array is parsed, we ensure at least one byte for each child
// exists and subtract them right away. This ensures that if ever a map or
// array declares more elements than could possibly be contained in the data,
// we will error out immediately rather than allocating storage for them.
//
// For example malicious data that repeats 0xDE 0xFF 0xFF (start of a map
// with 65536 key-value pairs) would otherwise cause us to run out of
// memory. With this, the parser can allocate at most as many nodes as
// there are bytes in the data (plus the paging overhead, 12%.) An error
// will be flagged immediately if and when there isn't enough data left to
// fully read all children of all open compound types on the parsing stack.
//
// Once an entire message has been parsed (and there are no nodes left to
// parse whose bytes have been subtracted), this matches the number of left
// over bytes in the data.
size_t possible_nodes_left;
mpack_node_data_t* nodes; // next node in current page/pool
size_t nodes_left; // nodes left in current page/pool
size_t current_node_reserved;
size_t level;
#ifdef MPACK_MALLOC
// It's much faster to allocate the initial parsing stack inline within the
// parser. We replace it with a heap allocation if we need to grow it.
mpack_level_t* stack;
size_t stack_capacity;
bool stack_owned;
mpack_level_t stack_local[MPACK_NODE_INITIAL_DEPTH];
#else
// Without malloc(), we have to reserve a parsing stack the maximum allowed
// parsing depth.
mpack_level_t stack[MPACK_NODE_MAX_DEPTH_WITHOUT_MALLOC];
#endif
} mpack_tree_parser_t;
struct mpack_tree_t {
mpack_tree_error_t error_fn; /* Function to call on error */
mpack_tree_read_t read_fn; /* Function to call to read more data */
mpack_tree_teardown_t teardown; /* Function to teardown the context on destroy */
void* context; /* Context for tree callbacks */
mpack_node_data_t nil_node; /* a nil node to be returned in case of error */
mpack_node_data_t missing_node; /* a missing node to be returned in optional lookups */
mpack_error_t error;
#ifdef MPACK_MALLOC
char* buffer;
size_t buffer_capacity;
#endif
const char* data;
size_t data_length; // length of data (and content of buffer, if used)
size_t size; // size in bytes of tree (usually matches data_length, but not if tree has trailing data)
size_t node_count; // total number of nodes in tree (across all pages)
size_t max_size; // maximum message size
size_t max_nodes; // maximum nodes in a message
mpack_tree_parser_t parser;
mpack_node_data_t* root;
mpack_node_data_t* pool; // pool, or NULL if no pool provided
size_t pool_count;
#ifdef MPACK_MALLOC
mpack_tree_page_t* next;
#endif
};
// internal functions
MPACK_INLINE mpack_node_t mpack_node(mpack_tree_t* tree, mpack_node_data_t* data) {
mpack_node_t node;
node.data = data;
node.tree = tree;
return node;
}
MPACK_INLINE mpack_node_data_t* mpack_node_child(mpack_node_t node, size_t child) {
return node.data->value.children + child;
}
MPACK_INLINE mpack_node_t mpack_tree_nil_node(mpack_tree_t* tree) {
return mpack_node(tree, &tree->nil_node);
}
MPACK_INLINE mpack_node_t mpack_tree_missing_node(mpack_tree_t* tree) {
return mpack_node(tree, &tree->missing_node);
}
/** @endcond */
/**
* @name Tree Initialization
* @{
*/
#ifdef MPACK_MALLOC
/**
* Initializes a tree parser with the given data.
*
* Configure the tree if desired, then call mpack_tree_parse() to parse it. The
* tree will allocate pages of nodes as needed and will free them when
* destroyed.
*
* The tree must be destroyed with mpack_tree_destroy().
*
* Any string or blob data types reference the original data, so the given data
* pointer must remain valid until after the tree is destroyed.
*/
void mpack_tree_init_data(mpack_tree_t* tree, const char* data, size_t length);
/**
* Deprecated.
*
* \deprecated Renamed to mpack_tree_init_data().
*/
MPACK_INLINE void mpack_tree_init(mpack_tree_t* tree, const char* data, size_t length) {
mpack_tree_init_data(tree, data, length);
}
/**
* Initializes a tree parser from an unbounded stream, or a stream of
* unknown length.
*
* The parser can be used to read a single message from a stream of unknown
* length, or multiple messages from an unbounded stream, allowing it to
* be used for RPC communication. Call @ref mpack_tree_parse() to parse
* a message from a blocking stream, or @ref mpack_tree_try_parse() for a
* non-blocking stream.
*
* The stream will use a growable internal buffer to store the most recent
* message, as well as allocated pages of nodes for the parse tree.
*
* Maximum allowances for message size and node count must be specified in this
* function (since the stream is unbounded.) They can be changed later with
* @ref mpack_tree_set_limits().
*
* @param tree The tree parser
* @param read_fn The read function
* @param context The context for the read function
* @param max_message_size The maximum size of a message in bytes
* @param max_message_nodes The maximum number of nodes per message. See
* @ref mpack_node_data_t for the size of nodes.
*
* @see mpack_tree_read_t
* @see mpack_reader_context()
*/
void mpack_tree_init_stream(mpack_tree_t* tree, mpack_tree_read_t read_fn, void* context,
size_t max_message_size, size_t max_message_nodes);
#endif
/**
* Initializes a tree parser with the given data, using the given node data
* pool to store the results.
*
* Configure the tree if desired, then call mpack_tree_parse() to parse it.
*
* If the data does not fit in the pool, @ref mpack_error_too_big will be flagged
* on the tree.
*
* The tree must be destroyed with mpack_tree_destroy(), even if parsing fails.
*/
void mpack_tree_init_pool(mpack_tree_t* tree, const char* data, size_t length,
mpack_node_data_t* node_pool, size_t node_pool_count);
/**
* Initializes an MPack tree directly into an error state. Use this if you
* are writing a wrapper to another <tt>mpack_tree_init*()</tt> function which
* can fail its setup.
*/
void mpack_tree_init_error(mpack_tree_t* tree, mpack_error_t error);
#if MPACK_STDIO
/**
* Initializes a tree to parse the given file. The tree must be destroyed with
* mpack_tree_destroy(), even if parsing fails.
*
* The file is opened, loaded fully into memory, and closed before this call
* returns.
*
* @param tree The tree to initialize
* @param filename The filename passed to fopen() to read the file
* @param max_bytes The maximum size of file to load, or 0 for unlimited size.
*/
void mpack_tree_init_filename(mpack_tree_t* tree, const char* filename, size_t max_bytes);
/**
* Deprecated.
*
* \deprecated Renamed to mpack_tree_init_filename().
*/
MPACK_INLINE void mpack_tree_init_file(mpack_tree_t* tree, const char* filename, size_t max_bytes) {
mpack_tree_init_filename(tree, filename, max_bytes);
}
/**
* Initializes a tree to parse the given libc FILE. This can be used to
* read from stdin, or from a file opened separately.
*
* The tree must be destroyed with mpack_tree_destroy(), even if parsing fails.
*
* The FILE is fully loaded fully into memory (and closed if requested) before
* this call returns.
*
* @param tree The tree to initialize.
* @param stdfile The FILE.
* @param max_bytes The maximum size of file to load, or 0 for unlimited size.
* @param close_when_done If true, fclose() will be called on the FILE when it
* is no longer needed. If false, the file will not be closed when
* reading is done.
*
* @warning The tree will read all data in the FILE before parsing it. If this
* is used on stdin, the parser will block until it is closed, even if
* a complete message has been written to it!
*/
void mpack_tree_init_stdfile(mpack_tree_t* tree, FILE* stdfile, size_t max_bytes, bool close_when_done);
#endif
/**
* @}
*/
/**
* @name Tree Functions
* @{
*/
/**
* Sets the maximum byte size and maximum number of nodes allowed per message.
*
* The default is SIZE_MAX (no limit) unless @ref mpack_tree_init_stream() is
* called (where maximums are required.)
*
* If a pool of nodes is used, the node limit is the lesser of this limit and
* the pool size.
*
* @param tree The tree parser
* @param max_message_size The maximum size of a message in bytes
* @param max_message_nodes The maximum number of nodes per message. See
* @ref mpack_node_data_t for the size of nodes.
*/
void mpack_tree_set_limits(mpack_tree_t* tree, size_t max_message_size,
size_t max_message_nodes);
/**
* Parses a MessagePack message into a tree of immutable nodes.
*
* If successful, the root node will be available under @ref mpack_tree_root().
* If not, an appropriate error will be flagged.
*
* This can be called repeatedly to parse a series of messages from a data
* source. When this is called, all previous nodes from this tree and their
* contents (including the root node) are invalidated.
*
* If this is called with a stream (see @ref mpack_tree_init_stream()), the
* stream must block until data is available. (Otherwise, if this is called on
* a non-blocking stream, parsing will fail with @ref mpack_error_io when the
* fill function returns 0.)
*
* There is no way to recover a tree in an error state. It must be destroyed.
*/
void mpack_tree_parse(mpack_tree_t* tree);
/**
* Attempts to parse a MessagePack message from a non-blocking stream into a
* tree of immutable nodes.
*
* A non-blocking read function must have been passed to the tree in
* mpack_tree_init_stream().
*
* If this returns true, a message is available under
* @ref mpack_tree_root(). The tree nodes and data will be valid until
* the next time a parse is started.
*
* If this returns false, no message is available, because either not enough
* data is available yet or an error has occurred. You must check the tree for
* errors whenever this returns false. If there is no error, you should try
* again later when more data is available. (You will want to select()/poll()
* on the underlying socket or use some other asynchronous mechanism to
* determine when it has data.)
*
* There is no way to recover a tree in an error state. It must be destroyed.
*
* @see mpack_tree_init_stream()
*/
bool mpack_tree_try_parse(mpack_tree_t* tree);
/**
* Returns the root node of the tree, if the tree is not in an error state.
* Returns a nil node otherwise.
*
* @warning You must call mpack_tree_parse() before calling this. If
* @ref mpack_tree_parse() was never called, the tree will assert.
*/
mpack_node_t mpack_tree_root(mpack_tree_t* tree);
/**
* Returns the error state of the tree.
*/
MPACK_INLINE mpack_error_t mpack_tree_error(mpack_tree_t* tree) {
return tree->error;
}
/**
* Returns the size in bytes of the current parsed message.
*
* If there is something in the buffer after the MessagePack object, this can
* be used to find it.
*
* This is zero if an error occurred during tree parsing (since the
* portion of the data that the first complete object occupies cannot
* be determined if the data is invalid or corrupted.)
*/
MPACK_INLINE size_t mpack_tree_size(mpack_tree_t* tree) {
return tree->size;
}
/**
* Destroys the tree.
*/
mpack_error_t mpack_tree_destroy(mpack_tree_t* tree);
/**
* Sets the custom pointer to pass to the tree callbacks, such as teardown.
*
* @param tree The MPack tree.
* @param context User data to pass to the tree callbacks.
*
* @see mpack_reader_context()
*/
MPACK_INLINE void mpack_tree_set_context(mpack_tree_t* tree, void* context) {
tree->context = context;
}
/**
* Returns the custom context for tree callbacks.
*
* @see mpack_tree_set_context
* @see mpack_tree_init_stream
*/
MPACK_INLINE void* mpack_tree_context(mpack_tree_t* tree) {
return tree->context;
}
/**
* Sets the error function to call when an error is flagged on the tree.
*
* This should normally be used with mpack_tree_set_context() to register
* a custom pointer to pass to the error function.
*
* See the definition of mpack_tree_error_t for more information about
* what you can do from an error callback.
*
* @see mpack_tree_error_t
* @param tree The MPack tree.
* @param error_fn The function to call when an error is flagged on the tree.
*/
MPACK_INLINE void mpack_tree_set_error_handler(mpack_tree_t* tree, mpack_tree_error_t error_fn) {
tree->error_fn = error_fn;
}
/**
* Sets the teardown function to call when the tree is destroyed.
*
* This should normally be used with mpack_tree_set_context() to register
* a custom pointer to pass to the teardown function.
*
* @param tree The MPack tree.
* @param teardown The function to call when the tree is destroyed.
*/
MPACK_INLINE void mpack_tree_set_teardown(mpack_tree_t* tree, mpack_tree_teardown_t teardown) {
tree->teardown = teardown;
}
/**
* Places the tree in the given error state, calling the error callback if one
* is set.
*
* This allows you to externally flag errors, for example if you are validating
* data as you read it.
*
* If the tree is already in an error state, this call is ignored and no
* error callback is called.
*/
void mpack_tree_flag_error(mpack_tree_t* tree, mpack_error_t error);
/**
* @}
*/
/**
* @name Node Core Functions
* @{
*/
/**
* Places the node's tree in the given error state, calling the error callback
* if one is set.
*
* This allows you to externally flag errors, for example if you are validating
* data as you read it.
*
* If the tree is already in an error state, this call is ignored and no
* error callback is called.
*/
void mpack_node_flag_error(mpack_node_t node, mpack_error_t error);
/**
* Returns the error state of the node's tree.
*/
MPACK_INLINE mpack_error_t mpack_node_error(mpack_node_t node) {
return mpack_tree_error(node.tree);
}
/**
* Returns a tag describing the given node, or a nil tag if the
* tree is in an error state.
*/
mpack_tag_t mpack_node_tag(mpack_node_t node);
/** @cond */
#if MPACK_DEBUG && MPACK_STDIO
/*
* Converts a node to a pseudo-JSON string for debugging purposes, placing the
* result in the given buffer with a null-terminator.
*
* If the buffer does not have enough space, the result will be truncated (but
* it is guaranteed to be null-terminated.)
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
void mpack_node_print_to_buffer(mpack_node_t node, char* buffer, size_t buffer_size);
/*
* Converts a node to pseudo-JSON for debugging purposes, calling the given
* callback as many times as is necessary to output the character data.
*
* No null-terminator or trailing newline will be written.
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
void mpack_node_print_to_callback(mpack_node_t node, mpack_print_callback_t callback, void* context);
/*
* Converts a node to pseudo-JSON for debugging purposes
* and pretty-prints it to the given file.
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
void mpack_node_print_to_file(mpack_node_t node, FILE* file);
/*
* Converts a node to pseudo-JSON for debugging purposes
* and pretty-prints it to stdout.
*
* This is only available in debug mode, and only if stdio is available (since
* it uses snprintf().) It's strictly for debugging purposes.
*/
MPACK_INLINE void mpack_node_print_to_stdout(mpack_node_t node) {
mpack_node_print_to_file(node, stdout);
}
/*
* Deprecated.
*
* \deprecated Renamed to mpack_node_print_to_stdout().
*/
MPACK_INLINE void mpack_node_print(mpack_node_t node) {
mpack_node_print_to_stdout(node);
}
#endif
/** @endcond */
/**
* @}
*/
/**
* @name Node Primitive Value Functions
* @{
*/
/**
* Returns the type of the node.
*/
mpack_type_t mpack_node_type(mpack_node_t node);
/**
* Returns true if the given node is a nil node; false otherwise.
*
* To ensure that a node is nil and flag an error otherwise, use
* mpack_node_nil().
*/
bool mpack_node_is_nil(mpack_node_t node);
/**
* Returns true if the given node handle indicates a missing node; false otherwise.
*
* To ensure that a node is missing and flag an error otherwise, use
* mpack_node_missing().
*/
bool mpack_node_is_missing(mpack_node_t node);
/**
* Checks that the given node is of nil type, raising @ref mpack_error_type
* otherwise.
*
* Use mpack_node_is_nil() to return whether the node is nil.
*/
void mpack_node_nil(mpack_node_t node);
/**
* Checks that the given node indicates a missing node, raising @ref
* mpack_error_type otherwise.
*
* Use mpack_node_is_missing() to return whether the node is missing.
*/
void mpack_node_missing(mpack_node_t node);
/**
* Returns the bool value of the node. If this node is not of the correct
* type, false is returned and mpack_error_type is raised.
*/
bool mpack_node_bool(mpack_node_t node);
/**
* Checks if the given node is of bool type with value true, raising
* mpack_error_type otherwise.
*/
void mpack_node_true(mpack_node_t node);
/**
* Checks if the given node is of bool type with value false, raising
* mpack_error_type otherwise.
*/
void mpack_node_false(mpack_node_t node);
/**
* Returns the 8-bit unsigned value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
uint8_t mpack_node_u8(mpack_node_t node);
/**
* Returns the 8-bit signed value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
int8_t mpack_node_i8(mpack_node_t node);
/**
* Returns the 16-bit unsigned value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
uint16_t mpack_node_u16(mpack_node_t node);
/**
* Returns the 16-bit signed value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
int16_t mpack_node_i16(mpack_node_t node);
/**
* Returns the 32-bit unsigned value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
uint32_t mpack_node_u32(mpack_node_t node);
/**
* Returns the 32-bit signed value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
int32_t mpack_node_i32(mpack_node_t node);
/**
* Returns the 64-bit unsigned value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised, and zero is returned.
*/
uint64_t mpack_node_u64(mpack_node_t node);
/**
* Returns the 64-bit signed value of the node. If this node is not
* of a compatible type, @ref mpack_error_type is raised and zero is returned.
*/
int64_t mpack_node_i64(mpack_node_t node);
/**
* Returns the unsigned int value of the node.
*
* Returns zero if an error occurs.
*
* @throws mpack_error_type If the node is not an integer type or does not fit in the range of an unsigned int
*/
unsigned int mpack_node_uint(mpack_node_t node);
/**
* Returns the int value of the node.
*
* Returns zero if an error occurs.
*
* @throws mpack_error_type If the node is not an integer type or does not fit in the range of an int
*/
int mpack_node_int(mpack_node_t node);
/**
* Returns the float value of the node. The underlying value can be an
* integer, float or double; the value is converted to a float.
*
* @note Reading a double or a large integer with this function can incur a
* loss of precision.
*
* @throws mpack_error_type if the underlying value is not a float, double or integer.
*/
float mpack_node_float(mpack_node_t node);
/**
* Returns the double value of the node. The underlying value can be an
* integer, float or double; the value is converted to a double.
*
* @note Reading a very large integer with this function can incur a
* loss of precision.
*
* @throws mpack_error_type if the underlying value is not a float, double or integer.
*/
double mpack_node_double(mpack_node_t node);
/**
* Returns the float value of the node. The underlying value must be a float,
* not a double or an integer. This ensures no loss of precision can occur.
*
* @throws mpack_error_type if the underlying value is not a float.
*/
float mpack_node_float_strict(mpack_node_t node);
/**
* Returns the double value of the node. The underlying value must be a float
* or double, not an integer. This ensures no loss of precision can occur.
*
* @throws mpack_error_type if the underlying value is not a float or double.
*/
double mpack_node_double_strict(mpack_node_t node);
#if MPACK_EXTENSIONS
/**
* Returns a timestamp.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @throws mpack_error_type if the underlying value is not a timestamp.
*/
mpack_timestamp_t mpack_node_timestamp(mpack_node_t node);
/**
* Returns a timestamp's (signed) seconds since 1970-01-01T00:00:00Z.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @throws mpack_error_type if the underlying value is not a timestamp.
*/
int64_t mpack_node_timestamp_seconds(mpack_node_t node);
/**
* Returns a timestamp's additional nanoseconds.
*
* @note This requires @ref MPACK_EXTENSIONS.
*
* @return A nanosecond count between 0 and 999,999,999 inclusive.
* @throws mpack_error_type if the underlying value is not a timestamp.
*/
uint32_t mpack_node_timestamp_nanoseconds(mpack_node_t node);
#endif
/**
* @}
*/
/**
* @name Node String and Data Functions
* @{
*/
/**
* Checks that the given node contains a valid UTF-8 string.
*
* If the string is invalid, this flags an error, which would cause subsequent calls
* to mpack_node_str() to return NULL and mpack_node_strlen() to return zero. So you
* can check the node for error immediately after calling this, or you can call those
* functions to use the data anyway and check for errors later.
*
* @throws mpack_error_type If this node is not a string or does not contain valid UTF-8.
*
* @param node The string node to test
*
* @see mpack_node_str()
* @see mpack_node_strlen()
*/
void mpack_node_check_utf8(mpack_node_t node);
/**
* Checks that the given node contains a valid UTF-8 string with no NUL bytes.
*
* This does not check that the string has a null-terminator! It only checks whether
* the string could safely be represented as a C-string by appending a null-terminator.
* (If the string does already contain a null-terminator, this will flag an error.)
*
* This is performed automatically by other UTF-8 cstr helper functions. Only
* call this if you will do something else with the data directly, but you still
* want to ensure it will be valid as a UTF-8 C-string.
*
* @throws mpack_error_type If this node is not a string, does not contain valid UTF-8,
* or contains a NUL byte.
*
* @param node The string node to test
*
* @see mpack_node_str()
* @see mpack_node_strlen()
* @see mpack_node_copy_utf8_cstr()
* @see mpack_node_utf8_cstr_alloc()
*/
void mpack_node_check_utf8_cstr(mpack_node_t node);
#if MPACK_EXTENSIONS
/**
* Returns the extension type of the given ext node.
*
* This returns zero if the tree is in an error state.
*
* @note This requires @ref MPACK_EXTENSIONS.
*/
int8_t mpack_node_exttype(mpack_node_t node);
#endif
/**
* Returns the number of bytes in the given bin node.
*
* This returns zero if the tree is in an error state.
*
* If this node is not a bin, @ref mpack_error_type is raised and zero is returned.
*/
size_t mpack_node_bin_size(mpack_node_t node);
/**
* Returns the length of the given str, bin or ext node.
*
* This returns zero if the tree is in an error state.
*
* If this node is not a str, bin or map, @ref mpack_error_type is raised and zero
* is returned.
*/
uint32_t mpack_node_data_len(mpack_node_t node);
/**
* Returns the length in bytes of the given string node. This does not
* include any null-terminator.
*
* This returns zero if the tree is in an error state.
*
* If this node is not a str, @ref mpack_error_type is raised and zero is returned.
*/
size_t mpack_node_strlen(mpack_node_t node);
/**
* Returns a pointer to the data contained by this node, ensuring the node is a
* string.
*
* @warning Strings are not null-terminated! Use one of the cstr functions
* to get a null-terminated string.
*
* The pointer is valid as long as the data backing the tree is valid.
*
* If this node is not a string, @ref mpack_error_type is raised and @c NULL is returned.
*
* @see mpack_node_copy_cstr()
* @see mpack_node_cstr_alloc()
* @see mpack_node_utf8_cstr_alloc()
*/
const char* mpack_node_str(mpack_node_t node);
/**
* Returns a pointer to the data contained by this node.
*
* @note Strings are not null-terminated! Use one of the cstr functions
* to get a null-terminated string.
*
* The pointer is valid as long as the data backing the tree is valid.
*
* If this node is not of a str, bin or map, @ref mpack_error_type is raised, and
* @c NULL is returned.
*
* @see mpack_node_copy_cstr()
* @see mpack_node_cstr_alloc()
* @see mpack_node_utf8_cstr_alloc()
*/
const char* mpack_node_data(mpack_node_t node);
/**
* Returns a pointer to the data contained by this bin node.
*
* The pointer is valid as long as the data backing the tree is valid.
*
* If this node is not a bin, @ref mpack_error_type is raised and @c NULL is
* returned.
*/
const char* mpack_node_bin_data(mpack_node_t node);
/**
* Copies the bytes contained by this node into the given buffer, returning the
* number of bytes in the node.
*
* @throws mpack_error_type If this node is not a str, bin or ext type
* @throws mpack_error_too_big If the string does not fit in the given buffer
*
* @param node The string node from which to copy data
* @param buffer A buffer in which to copy the node's bytes
* @param bufsize The size of the given buffer
*
* @return The number of bytes in the node, or zero if an error occurs.
*/
size_t mpack_node_copy_data(mpack_node_t node, char* buffer, size_t bufsize);
/**
* Checks that the given node contains a valid UTF-8 string and copies the
* string into the given buffer, returning the number of bytes in the string.
*
* @throws mpack_error_type If this node is not a string
* @throws mpack_error_too_big If the string does not fit in the given buffer
*
* @param node The string node from which to copy data
* @param buffer A buffer in which to copy the node's bytes
* @param bufsize The size of the given buffer
*
* @return The number of bytes in the node, or zero if an error occurs.
*/
size_t mpack_node_copy_utf8(mpack_node_t node, char* buffer, size_t bufsize);
/**
* Checks that the given node contains a string with no NUL bytes, copies the string
* into the given buffer, and adds a null terminator.
*
* If this node is not of a string type, @ref mpack_error_type is raised. If the string
* does not fit, @ref mpack_error_data is raised.
*
* If any error occurs, the buffer will contain an empty null-terminated string.
*
* @param node The string node from which to copy data
* @param buffer A buffer in which to copy the node's string
* @param size The size of the given buffer
*/
void mpack_node_copy_cstr(mpack_node_t node, char* buffer, size_t size);
/**
* Checks that the given node contains a valid UTF-8 string with no NUL bytes,
* copies the string into the given buffer, and adds a null terminator.
*
* If this node is not of a string type, @ref mpack_error_type is raised. If the string
* does not fit, @ref mpack_error_data is raised.
*
* If any error occurs, the buffer will contain an empty null-terminated string.
*
* @param node The string node from which to copy data
* @param buffer A buffer in which to copy the node's string
* @param size The size of the given buffer
*/
void mpack_node_copy_utf8_cstr(mpack_node_t node, char* buffer, size_t size);
#ifdef MPACK_MALLOC
/**
* Allocates a new chunk of data using MPACK_MALLOC() with the bytes
* contained by this node.
*
* The allocated data must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @throws mpack_error_type If this node is not a str, bin or ext type
* @throws mpack_error_too_big If the size of the data is larger than the
* given maximum size
* @throws mpack_error_memory If an allocation failure occurs
*
* @param node The node from which to allocate and copy data
* @param maxsize The maximum size to allocate
*
* @return The allocated data, or NULL if any error occurs.
*/
char* mpack_node_data_alloc(mpack_node_t node, size_t maxsize);
/**
* Allocates a new null-terminated string using MPACK_MALLOC() with the string
* contained by this node.
*
* The allocated string must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @throws mpack_error_type If this node is not a string or contains NUL bytes
* @throws mpack_error_too_big If the size of the string plus null-terminator
* is larger than the given maximum size
* @throws mpack_error_memory If an allocation failure occurs
*
* @param node The node from which to allocate and copy string data
* @param maxsize The maximum size to allocate, including the null-terminator
*
* @return The allocated string, or NULL if any error occurs.
*/
char* mpack_node_cstr_alloc(mpack_node_t node, size_t maxsize);
/**
* Allocates a new null-terminated string using MPACK_MALLOC() with the UTF-8
* string contained by this node.
*
* The allocated string must be freed with MPACK_FREE() (or simply free()
* if MPack's allocator hasn't been customized.)
*
* @throws mpack_error_type If this node is not a string, is not valid UTF-8,
* or contains NUL bytes
* @throws mpack_error_too_big If the size of the string plus null-terminator
* is larger than the given maximum size
* @throws mpack_error_memory If an allocation failure occurs
*
* @param node The node from which to allocate and copy string data
* @param maxsize The maximum size to allocate, including the null-terminator
*
* @return The allocated string, or NULL if any error occurs.
*/
char* mpack_node_utf8_cstr_alloc(mpack_node_t node, size_t maxsize);
#endif
/**
* Searches the given string array for a string matching the given
* node and returns its index.
*
* If the node does not match any of the given strings,
* @ref mpack_error_type is flagged. Use mpack_node_enum_optional()
* if you want to allow values other than the given strings.
*
* If any error occurs or if the tree is in an error state, @a count
* is returned.
*
* This can be used to quickly parse a string into an enum when the
* enum values range from 0 to @a count-1. If the last value in the
* enum is a special "count" value, it can be passed as the count,
* and the return value can be cast directly to the enum type.
*
* @code{.c}
* typedef enum { APPLE , BANANA , ORANGE , COUNT} fruit_t;
* const char* fruits[] = {"apple", "banana", "orange"};
*
* fruit_t fruit = (fruit_t)mpack_node_enum(node, fruits, COUNT);
* @endcode
*
* @param node The node
* @param strings An array of expected strings of length count
* @param count The number of strings
* @return The index of the matched string, or @a count in case of error
*/
size_t mpack_node_enum(mpack_node_t node, const char* strings[], size_t count);
/**
* Searches the given string array for a string matching the given node,
* returning its index or @a count if no strings match.
*
* If the value is not a string, or it does not match any of the
* given strings, @a count is returned and no error is flagged.
*
* If any error occurs or if the tree is in an error state, @a count
* is returned.
*
* This can be used to quickly parse a string into an enum when the
* enum values range from 0 to @a count-1. If the last value in the
* enum is a special "count" value, it can be passed as the count,
* and the return value can be cast directly to the enum type.
*
* @code{.c}
* typedef enum { APPLE , BANANA , ORANGE , COUNT} fruit_t;
* const char* fruits[] = {"apple", "banana", "orange"};
*
* fruit_t fruit = (fruit_t)mpack_node_enum_optional(node, fruits, COUNT);
* @endcode
*
* @param node The node
* @param strings An array of expected strings of length count
* @param count The number of strings
* @return The index of the matched string, or @a count in case of error
*/
size_t mpack_node_enum_optional(mpack_node_t node, const char* strings[], size_t count);
/**
* @}
*/
/**
* @name Compound Node Functions
* @{
*/
/**
* Returns the length of the given array node. Raises mpack_error_type
* and returns 0 if the given node is not an array.
*/
size_t mpack_node_array_length(mpack_node_t node);
/**
* Returns the node in the given array at the given index. If the node
* is not an array, @ref mpack_error_type is raised and a nil node is returned.
* If the given index is out of bounds, @ref mpack_error_data is raised and
* a nil node is returned.
*/
mpack_node_t mpack_node_array_at(mpack_node_t node, size_t index);
/**
* Returns the number of key/value pairs in the given map node. Raises
* mpack_error_type and returns 0 if the given node is not a map.
*/
size_t mpack_node_map_count(mpack_node_t node);
/**
* Returns the key node in the given map at the given index.
*
* A nil node is returned in case of error.
*
* @throws mpack_error_type if the node is not a map
* @throws mpack_error_data if the given index is out of bounds
*/
mpack_node_t mpack_node_map_key_at(mpack_node_t node, size_t index);
/**
* Returns the value node in the given map at the given index.
*
* A nil node is returned in case of error.
*
* @throws mpack_error_type if the node is not a map
* @throws mpack_error_data if the given index is out of bounds
*/
mpack_node_t mpack_node_map_value_at(mpack_node_t node, size_t index);
/**
* Returns the value node in the given map for the given integer key.
*
* The key must exist within the map. Use mpack_node_map_int_optional() to
* check for optional keys.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node does not contain exactly one entry with the given key
*
* @return The value node for the given key, or a nil node in case of error
*/
mpack_node_t mpack_node_map_int(mpack_node_t node, int64_t num);
/**
* Returns the value node in the given map for the given integer key, or a
* missing node if the map does not contain the given key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*
* @return The value node for the given key, or a missing node if the key does
* not exist, or a nil node in case of error
*
* @see mpack_node_is_missing()
*/
mpack_node_t mpack_node_map_int_optional(mpack_node_t node, int64_t num);
/**
* Returns the value node in the given map for the given unsigned integer key.
*
* The key must exist within the map. Use mpack_node_map_uint_optional() to
* check for optional keys.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node does not contain exactly one entry with the given key
*
* @return The value node for the given key, or a nil node in case of error
*/
mpack_node_t mpack_node_map_uint(mpack_node_t node, uint64_t num);
/**
* Returns the value node in the given map for the given unsigned integer
* key, or a nil node if the map does not contain the given key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*
* @return The value node for the given key, or a missing node if the key does
* not exist, or a nil node in case of error
*
* @see mpack_node_is_missing()
*/
mpack_node_t mpack_node_map_uint_optional(mpack_node_t node, uint64_t num);
/**
* Returns the value node in the given map for the given string key.
*
* The key must exist within the map. Use mpack_node_map_str_optional() to
* check for optional keys.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node does not contain exactly one entry with the given key
*
* @return The value node for the given key, or a nil node in case of error
*/
mpack_node_t mpack_node_map_str(mpack_node_t node, const char* str, size_t length);
/**
* Returns the value node in the given map for the given string key, or a nil
* node if the map does not contain the given key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*
* @return The value node for the given key, or a missing node if the key does
* not exist, or a nil node in case of error
*
* @see mpack_node_is_missing()
*/
mpack_node_t mpack_node_map_str_optional(mpack_node_t node, const char* str, size_t length);
/**
* Returns the value node in the given map for the given null-terminated
* string key.
*
* The key must exist within the map. Use mpack_node_map_cstr_optional() to
* check for optional keys.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node does not contain exactly one entry with the given key
*
* @return The value node for the given key, or a nil node in case of error
*/
mpack_node_t mpack_node_map_cstr(mpack_node_t node, const char* cstr);
/**
* Returns the value node in the given map for the given null-terminated
* string key, or a nil node if the map does not contain the given key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*
* @return The value node for the given key, or a missing node if the key does
* not exist, or a nil node in case of error
*
* @see mpack_node_is_missing()
*/
mpack_node_t mpack_node_map_cstr_optional(mpack_node_t node, const char* cstr);
/**
* Returns true if the given node map contains exactly one entry with the
* given integer key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*/
bool mpack_node_map_contains_int(mpack_node_t node, int64_t num);
/**
* Returns true if the given node map contains exactly one entry with the
* given unsigned integer key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*/
bool mpack_node_map_contains_uint(mpack_node_t node, uint64_t num);
/**
* Returns true if the given node map contains exactly one entry with the
* given string key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*/
bool mpack_node_map_contains_str(mpack_node_t node, const char* str, size_t length);
/**
* Returns true if the given node map contains exactly one entry with the
* given null-terminated string key.
*
* The key must be unique. An error is flagged if the node has multiple
* entries with the given key.
*
* @throws mpack_error_type If the node is not a map
* @throws mpack_error_data If the node contains more than one entry with the given key
*/
bool mpack_node_map_contains_cstr(mpack_node_t node, const char* cstr);
/**
* @}
*/
/**
* @}
*/
#endif
MPACK_HEADER_END
#endif
#endif
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