regexp.c

/*
 * Copyright (c) 2005 - 2011 Miek Gieben
 * License: GPLv3(+), see LICENSE for details
 *
 * regexp helper functions
 */

#include "rdup.h"
#define PCRE2_CODE_UNIT_WIDTH 8
#include <pcre2.h>

GSList *pregex_list = NULL;

/**
 * Read the filename and create the compiled regexp
 * in a linked list
 */
gboolean regexp_init(char *file)
{
	FILE *fp;
	char *buf;
	int errcode;
	PCRE2_SIZE erroff;
	char delim;
	gpointer d;
	size_t l;
	size_t s;
	size_t re_length;
	ssize_t j;
	pcre2_code *P;

	if ((fp = fopen(file, "r")) == NULL) {
		msg(_("Could not open '%s\': %s"), file, strerror(errno));
		exit(EXIT_FAILURE);
	}
	/* read the regexp */
	buf = g_malloc(BUFSIZE + 1);
	s = BUFSIZE;
	delim = '\n';

	l = 1;
	while ((j = rdup_getdelim(&buf, &s, delim, fp)) != -1) {
		if (buf[0] == '#' || buf[0] == '\n')
			continue;

		/* buf[j - 1] holds the delimeter */
		buf[j - 1] = '\0';

		if ((P = pcre2_compile((PCRE2_SPTR)buf, PCRE2_ZERO_TERMINATED, 0, &errcode, &erroff, NULL)) == NULL) {
			/* error */
			fclose(fp);
			msg(_
			    ("Corrupt regular expression line: %zd, column %d: %d"),
			    l, erroff, errcode);
			g_free(buf);
			return FALSE;
		} else {
			pcre2_pattern_info(P, PCRE2_INFO_SIZE, &re_length);
			d = g_malloc(re_length);
			d = memcpy(d, P, re_length);
			pregex_list = g_slist_append(pregex_list, d);
		}
		l++;
	}
	fclose(fp);
	g_free(buf);
	return TRUE;
}