add: config loading

helpers/load_config.c

@@ -0,0 +1,69 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include <helpers.h>
+#include <config.h>
+#include <logger.h>
+#include <confini.h>
+
+#define CONFINI_IS_KEY(SECTION, KEY) \
+    (ini_array_match(SECTION, disp->append_to, '.', disp->format) && \
+     ini_string_match_ii(KEY, disp->data, disp->format))
+
+int
+helper_load_config(IniDispatch *disp, void *config_void)
+{
+    config_t *config = (config_t*)config_void;
+    char relay_section_name[10]; // "relay-255\0" is longest name 
+
+    if(disp->type == INI_KEY)
+    {
+        if(CONFINI_IS_KEY("controller", "name"))
+        {
+            strncpy(config->name, disp->value, MAX_NAME_LENGTH);
+            config->name[MAX_NAME_LENGTH] = '\0';
+            return 0;
+        }
+        if(CONFINI_IS_KEY("controller", "discovery-port"))
+        {
+            config->discovery_port = atoi(disp->value);
+            return 0;
+        }
+        if(CONFINI_IS_KEY("controller", "relay-count"))
+        {
+            config->relay_count = atoi(disp->value);
+            config->relay_configs = malloc(sizeof(config_relay_t) * config->relay_count);
+            for(uint8_t i = 0; i < config->relay_count; ++i)
+            {
+                config->relay_configs[i].driver= RELAY_DRIVER_NONE;
+            }
+            LOG_TRACE("config relay-count set to %u", config->relay_count);
+            return 0;
+        }
+        for(uint8_t i = 0; i < config->relay_count; ++i)
+        {
+            sprintf(relay_section_name, "relay-%u", i);
+            if(CONFINI_IS_KEY(relay_section_name, "pin"))
+            {
+                config->relay_configs[i].pin = atoi(disp->value);
+                return 0;
+            }
+            if(CONFINI_IS_KEY(relay_section_name, "driver"))
+            {
+                if(strcasecmp(disp->value, "gpio") == 0)
+                {
+                    config->relay_configs[i].driver = RELAY_DRIVER_GPIO;
+                    return 0;
+                }
+                if(strcasecmp(disp->value, "piface") == 0)
+                {
+                    config->relay_configs[i].driver = RELAY_DRIVER_PIFACE;
+                    return 0;
+                }
+                LOG_WARN("invalid driver '%s' in section '%s'", disp->value, relay_section_name);
+                return 0;
+            }
+        }
+    }
+    return 0;
+}