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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "config.h"
#include "macros.h"
#include "misc.h"
config_val parse_option_value(const config_opt *opt, char *value) {
config_val val = {0};
switch (opt->type) {
case TYPE_INT :
case TYPE_BOOL : val.i = strtol(value, NULL, 0); break;
case TYPE_STRING: val.str = make_str(value); break;
case TYPE_FLOAT : val.f = strtof(value, NULL); break;
default : break;
}
return val;
}
void set_config_opt(config *conf, config_type type, size_t offset, config_val val) {
char *cfg = (char *)conf;
switch (type) {
case TYPE_INT :
case TYPE_BOOL : *(int *)(cfg+offset) = val.i; break;
case TYPE_STRING: *(char **)(cfg+offset) = val.str; break;
case TYPE_FLOAT : *(float *)(cfg+offset) = val.f; break;
default : break;
}
}
void cleanup_config(config *conf) {
char *cfg = (char *)conf;
for (const config_opt *opt = config_opts; opt->name != NULL; opt++) {
if (opt->type == TYPE_STRING && *(char **)(cfg+opt->offset) != NULL) {
free(*(char **)(cfg+opt->offset));
}
}
free(conf);
}
config *parse_config(const char *filename) {
long filesize = 0;
config *cfg;
char *buf = read_file(filename, &filesize);
char *tmp = buf;
if (buf == NULL) {
return NULL;
}
cfg = calloc(1, sizeof(config));
if (cfg == NULL) {
free(buf);
return NULL;
}
while (*tmp != '\0') {
char *line = get_line(&tmp);
char *value;
char *name = strtok_r(line, "=", &value);
const config_opt *opt;
for (opt = config_opts; opt->name != NULL && strcmp(name, opt->name); opt++);
if (opt->name != NULL) {
config_val val = parse_option_value(opt, value);
if (opt->offset == offsetof(config, port)) {
const int port = strtol(val.str, NULL, 0);
if (port <= 0 || port > 65535) {
log(LOG_ERR, "Invalid port %d. (Valid port must be between 1, and 65535.)", port);
cleanup_config(cfg);
free(line);
free(buf);
return NULL;
}
}
set_config_opt(cfg, opt->type, opt->offset, val);
}
free(line);
}
free(buf);
return cfg;
}
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