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#ifndef __CONF_H__
#define __CONF_H__
#include <stdbool.h>
typedef enum {
CONF_TYPE_STRING,
CONF_TYPE_INT,
CONF_TYPE_DOUBLE,
CONF_TYPE_BOOL,
} ConfigType;
typedef union {
char *s;
int i;
double d;
} ConfigValue;
typedef struct ConfigEntry ConfigEntry;
struct ConfigEntry {
ConfigEntry *next;
const char *longname;
char shortname;
ConfigType type;
bool is_parametric;
union {
void *var; /* ptr to char* or int or double */
void (*apply)(int key, ConfigValue value);
};
int var_set;
const char *desc;
const char *argdesc;
ConfigValue from_file;
int var_set_from_file;
ConfigValue dflt;
};
extern ConfigEntry *configs;
#define CONF_STRING(name,shortname_,dflt_,desc_,argdesc_) \
static char *CONF_##name; \
static void __attribute__((constructor)) DECLARE_##name(void) { \
static ConfigEntry config = { \
.longname = #name, \
.shortname = shortname_, \
.type = CONF_TYPE_STRING, \
.var = &CONF_##name, \
.var_set = FALSE, \
.desc = desc_, \
.argdesc = argdesc_, \
.dflt.s = dflt_, \
}; \
config.next = configs; \
configs = &config; \
}
#define CONF_PARAMETRIC_STRING(name,shortname_,func,desc_,argdesc_) \
static void __attribute__((constructor)) DECLARE_##name(void) { \
static ConfigEntry config = { \
.longname = #name, \
.shortname = shortname_, \
.type = CONF_TYPE_STRING, \
.is_parametric = true, \
.apply = func, \
.desc = desc_, \
.argdesc = argdesc_, \
}; \
config.next = configs; \
configs = &config; \
}
#define CONF_INT(name,shortname_,dflt_,desc_,argdesc_) \
static int CONF_##name = -1; \
static void __attribute__((constructor)) DECLARE_##name(void) { \
static ConfigEntry config = { \
.longname = #name, \
.shortname = shortname_, \
.type = CONF_TYPE_INT, \
.var = &CONF_##name, \
.var_set = FALSE, \
.desc = desc_, \
.argdesc = argdesc_, \
.dflt.i = dflt_, \
}; \
config.next = configs; \
configs = &config; \
}
#define CONF_DOUBLE(name,shortname_,dflt_,desc_,argdesc_) \
static double CONF_##name = -1.0; \
static void __attribute__((constructor)) DECLARE_##name(void) { \
static ConfigEntry config = { \
.longname = #name, \
.shortname = shortname_, \
.type = CONF_TYPE_DOUBLE, \
.var = &CONF_##name, \
.var_set = FALSE, \
.desc = desc_, \
.argdesc = argdesc_, \
.dflt.d = dflt_, \
}; \
config.next = configs; \
configs = &config; \
}
#define CONF_BOOL(name,shortname_,dflt_,desc_) \
static int CONF_##name = FALSE; \
static void __attribute__((constructor)) DECLARE_##name(void) { \
static ConfigEntry config = { \
.longname = #name, \
.shortname = shortname_, \
.type = CONF_TYPE_BOOL, \
.var = &CONF_##name, \
.var_set = FALSE, \
.desc = desc_, \
.argdesc = NULL, \
.dflt.i = dflt_, \
}; \
config.next = configs; \
configs = &config; \
}
int conf_parse(int *argcp, char ***argvp);
#endif
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