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JSONHelpers.h
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JSONHelpers.h
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#ifndef JSONHELPERS_H
#define JSONHELPERS_H
#include <Util/Log.h>
#define READ_VAR_FROM_JSON(type, fmt, pj, var, jsonvar, description, fallback, optional) \
{ \
struct json_object* _##var; \
if (!json_object_object_get_ex(pj, #jsonvar, &_##var)) { \
if (optional == 0) { \
LOG_WARNING("Failed to find " description " in config, falling back to " fmt, fallback); \
} \
var = fallback; \
} else \
var = json_object_get_##type(_##var); \
}
#define READ_INT_FROM_JSON(pj, var, jsonvar, description, fallback, optional) \
READ_VAR_FROM_JSON(int, "%i", pj, var, jsonvar, description, fallback, optional)
#define READ_DOUBLE_FROM_JSON(pj, var, jsonvar, description, fallback, optional) \
READ_VAR_FROM_JSON(double, "%lf", pj, var, jsonvar, description, fallback, optional)
#define READ_STR_FROM_JSON(pj, var, jsonvar, description, fallback, optional) \
READ_VAR_FROM_JSON(string, "\"%s\"", pj, var, jsonvar, description, fallback, optional)
#define READ_INT_ARR_FROM_JSON(pj, var, jsonvar, description, fallback, fbsize, optional) \
{ \
struct json_object* _##var; \
if (!json_object_object_get_ex(pj, #jsonvar, &_##var)) { \
if (optional == 0) { \
LOG_WARNING("Failed to find " description " in config, falling back to " #fallback); \
} \
for (int i = 0; i < fbsize; ++i) \
var[i] = fallback[i]; \
} else { \
int _len_##var = json_object_array_length(_##var); \
for (int i = 0; i < fbsize; ++i) { \
if (i < _len_##var) { \
var[i] = json_object_get_int(json_object_array_get_idx(_##var, i)); \
} else { \
LOG_WARNING("Config option " #jsonvar "[%i] not found, falling back to %i", i, fallback[i]); \
var[i] = fallback[i]; \
} \
} \
} \
}
#endif