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/*
* Option parsing
*
* SPDX-License-Identifier: MIT
*/
#include "optparse.h"
#include "wayback_log.h"
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int optind = 0, optpos = 0, optoper = 0;
int optparse(int argc, char *argv[], const struct optcmd opts[], uint32_t optlen)
{
optpos++;
optpos += optoper;
optoper = 0;
if (optpos >= argc || !argv[optpos]) {
return -1;
}
for (uint32_t i = 0; i < optlen; i++) {
/* help message */
if (strcmp(argv[optpos], "-help") == 0) {
wayback_log(LOG_INFO,
"Wayback <https://wayback.freedesktop.org/> X.Org compatibility layer");
wayback_log(
LOG_INFO,
"Report bugs to <https://gitlab.freedesktop.org/wayback/wayback/-/issues>.");
wayback_log(LOG_INFO, "Usage: %s [option]", argv[0]);
wayback_log(LOG_INFO, "\t-help\t\t show this help message");
for (size_t j = 0; j < optlen; j++) {
if (!opts[j].ignore) {
wayback_log(LOG_INFO,
"\t%s%s\t\t %s",
opts[j].name,
opts[j].flag == OPT_OPERAND ? " opt" : "",
opts[j].description);
}
}
exit(EXIT_SUCCESS);
} else if (strcmp(argv[optpos], opts[i].name) == 0) {
if (((opts[i].flag == OPT_OPERAND) && (((optpos + 1) >= argc || !argv[optpos + 1]))) ||
opts[i].flag == OPT_NUM) {
wayback_log(LOG_ERROR, "Option %s requires operand", argv[optpos]);
exit(EXIT_FAILURE);
} else if (opts[i].ignore == true) {
if (strcmp(opts[i].description, "") != 0)
wayback_log(LOG_WARN, "%s: %s", argv[optpos], opts[i].description);
else
wayback_log(LOG_WARN, "Option %s ignored", argv[optpos]);
}
if (opts[i].flag == OPT_OPERAND) {
optind++;
optoper++;
}
optind++;
break;
} else if (opts[i].flag == OPT_NUM &&
strncmp(argv[optpos], opts[i].name, strlen(opts[i].name)) == 0) {
if (opts[i].ignore == true) {
if (strcmp(opts[i].description, "") != 0)
wayback_log(LOG_WARN, "%s: %s", argv[optpos], opts[i].description);
else
wayback_log(LOG_WARN, "Option %s ignored", argv[optpos]);
}
optind++;
break;
}
}
return optpos;
}
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