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

#include "util.h"

#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.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 fd_set_nonblock(int fd) {
	int flags = fcntl(fd, F_GETFL);
	if (flags < 0) {
		perror("fcntl(F_GETFL):");
		return -1;
	}
	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
		perror("fcntl(F_SETFL):");
		return -1;
	}

	return 0;
}

int regex_match(const char *pattern, const char *str) {
	int errnum;
	PCRE2_SIZE erroffset;
	pcre2_code *re = pcre2_compile((PCRE2_SPTR)pattern, PCRE2_ZERO_TERMINATED,
								   PCRE2_UTF, // 启用 UTF-8 支持
								   &errnum, &erroffset, NULL);
	if (!re) {
		PCRE2_UCHAR errbuf[256];
		pcre2_get_error_message(errnum, errbuf, sizeof(errbuf));
		fprintf(stderr, "PCRE2 error: %s at offset %zu\n", errbuf, erroffset);
		return 0;
	}

	pcre2_match_data *match_data =
		pcre2_match_data_create_from_pattern(re, NULL);
	int ret =
		pcre2_match(re, (PCRE2_SPTR)str, strlen(str), 0, 0, match_data, NULL);

	pcre2_match_data_free(match_data);
	pcre2_code_free(re);
	return ret >= 0;
}