/* See LICENSE file for copyright and license details. */
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>

#include "util.h"

void
die(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);

	if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
		fputc(' ', stderr);
		perror(NULL);
	} else {
		fputc('\n', stderr);
	}

	exit(1);
}

void *
ecalloc(size_t nmemb, size_t size)
{
	void *p;

	if (!(p = calloc(nmemb, size)))
		die("calloc:");
	return p;
}

int
reMatch(const char *regex, const char *str) {
    char reErr[1024] = {0};
    regex_t *re = calloc(1, sizeof(regex_t));
    int rc = 0;

    if (!re)
        return -1;

    rc = regcomp(re, regex, REG_EXTENDED|REG_ICASE|REG_NOSUB);
    if (rc != 0) {
        regerror(rc, re, reErr, 1024);
		regfree(re); re = NULL;
        fprintf(stderr, "Regex compile err: %s %s\n", regex, reErr);
        return -1;
    }

    rc = regexec(re, str, 0, NULL, 0);
    regfree(re); re = NULL;
    if (rc != 0) {
        regerror(rc, re, reErr, 1024);
        fprintf(stderr, "Regex match error: %s -> %s : %s\n",
                regex, str, reErr);
        return -1;
    }

    return rc;
}