78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <uuid/uuid.h>
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#include <models/controller.h>
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#include <macros.h>
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static void
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controller_load_single(MDB_txn *mdb_txn, MDB_dbi mdb_dbi, controller_db_key key_meta, MDB_val *value)
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{
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int err;
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MDB_val key;
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key.mv_size = sizeof(controller_db_key);
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key.mv_data = &key_meta;
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if((err = mdb_get(mdb_txn, mdb_dbi, &key, value)) != 0)
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{
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fprintf(stderr, "mdb_get error %s\n", mdb_strerror(err));
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exit(1);
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}
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}
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controller*
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controller_load(MDB_env *mdb_env)
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{
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int err;
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MDB_txn *mdb_txn;
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MDB_dbi mdb_dbi;
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controller *new_controller;
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if((err = mdb_txn_begin(mdb_env, NULL, MDB_RDONLY, &mdb_txn)) != 0)
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{
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fprintf(stderr, "mdb_txn_begin error %s\n", mdb_strerror(err));
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exit(1);
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}
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if((err = mdb_dbi_open(mdb_txn, "meta", 0, &mdb_dbi)) != 0)
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{
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switch(err)
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{
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case MDB_NOTFOUND:
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mdb_txn_abort(mdb_txn);
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new_controller = controller_create();
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controller_save(new_controller, mdb_env);
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return new_controller;
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default:
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fprintf(stderr, "mdb_txn_begin error %s\n", mdb_strerror(err));
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exit(1);
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}
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}
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new_controller = malloc(sizeof(*new_controller));
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MDB_val value;
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controller_load_single(mdb_txn, mdb_dbi, KEY_META_UUID, &value);
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memmove(new_controller->uuid, (uuid_t*)value.mv_data, sizeof(uuid_t));
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controller_load_single(mdb_txn, mdb_dbi, KEY_META_NAME, &value);
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strncpy(new_controller->name, (char*)value.mv_data, CONTROLLER_NAME_LENGTH);
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new_controller->name[CONTROLLER_NAME_LENGTH] = '\0';
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controller_load_single(mdb_txn, mdb_dbi, KEY_META_PORT, &value);
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new_controller->port = ((uint16_t*)value.mv_data)[0];
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controller_load_single(mdb_txn, mdb_dbi, KEY_META_RELAY_COUNT, &value);
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new_controller->relay_count = ((uint8_t*)value.mv_data)[0];
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controller_debug(new_controller);
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mdb_txn_abort(mdb_txn); // transaction is read only
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return new_controller;
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}
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