conf.c

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#include <config.h>

#include <conf.h>
#include <string.h>

#include <drivers/drivers.h>
#include <confuse.h>

conf_t conf;


static int set_conf_driver_by_name(char *name) {
    size_t i;

    for(i = 0; drivers[i].name != NULL; i++) {
        if(strcasecmp(name, drivers[i].name) == 0) {
            conf.driver = &(drivers[i]);
            return 0;
        }
    }

    return -1;
}


int read_conf(char *filename) {
    int result;
    cfg_t *cfg;

    cfg_opt_t opts[] = {
        CFG_STR("driver", "null", CFGF_NONE),

        CFG_STR("server", "192.168.1.200", CFGF_NONE),
        CFG_INT("port", 5000, CFGF_NONE),

        CFG_STR("recording_prefix", "recording", CFGF_NONE),

        CFG_FLOAT("steering_offset", 0.0, CFGF_NONE),

        CFG_END()
    };

    cfg = cfg_init(opts, CFGF_NOCASE);
    if(filename == NULL) {
        // Read an empty configuration to get the default values
        result = cfg_parse_buf(cfg, "");
    } else {
        result = cfg_parse(cfg, filename);
    }
    if(result == CFG_FILE_ERROR) {
        perror("Error reading configuration file: ");
        return -1;
    } else if(result == CFG_PARSE_ERROR) {
        fprintf(stderr, "Error parsing configuration file\n");
        return -1;
    }

#define CONF_STR(name) conf.name = strdup(cfg_getstr(cfg, #name));
#define CONF_INT(name) conf.name = cfg_getint(cfg, #name);
#define CONF_FLOAT(name) conf.name = cfg_getfloat(cfg, #name);
#define CONF_BOOL(name) conf.name = cfg_getbool(cfg, #name);

    result = set_conf_driver_by_name(cfg_getstr(cfg, "driver"));
    if(result < 0) {
        fprintf(stderr, "Invalid driver name in configuration file\n");
        return -1;
    }

    CONF_STR(server);
    CONF_INT(port);

    CONF_STR(recording_prefix);

    CONF_FLOAT(steering_offset);

    cfg_free(cfg);
    return 0;
}

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