re_comp.c revision 205146
11578Srgrimes/*- 21578Srgrimes * Copyright (c) 1992 The Regents of the University of California. 31578Srgrimes * All rights reserved. 41578Srgrimes * 51578Srgrimes * This code is derived from software contributed to Berkeley by 61578Srgrimes * James da Silva at the University of Maryland at College Park. 71578Srgrimes * 81578Srgrimes * Redistribution and use in source and binary forms, with or without 91578Srgrimes * modification, are permitted provided that the following conditions 101578Srgrimes * are met: 111578Srgrimes * 1. Redistributions of source code must retain the above copyright 121578Srgrimes * notice, this list of conditions and the following disclaimer. 131578Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141578Srgrimes * notice, this list of conditions and the following disclaimer in the 151578Srgrimes * documentation and/or other materials provided with the distribution. 161578Srgrimes * 4. Neither the name of the University nor the names of its contributors 171578Srgrimes * may be used to endorse or promote products derived from this software 181578Srgrimes * without specific prior written permission. 191578Srgrimes * 201578Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211578Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221578Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231578Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241578Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251578Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261578Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271578Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281578Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291578Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301578Srgrimes * SUCH DAMAGE. 311578Srgrimes */ 321578Srgrimes 33165906Simp#include <sys/cdefs.h> 34165906Simp__FBSDID("$FreeBSD: head/lib/libcompat/4.3/re_comp.c 205146 2010-03-14 10:18:58Z ed $"); 35165906Simp 361578Srgrimes/* 371578Srgrimes * Compatibility routines that implement the old re_comp/re_exec interface in 381578Srgrimes * terms of the regcomp/regexec interface. It's possible that some programs 391578Srgrimes * rely on dark corners of re_comp/re_exec and won't work with this version, 401578Srgrimes * but most programs should be fine. 411578Srgrimes */ 421578Srgrimes 431578Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 441578Srgrimesstatic char sccsid[] = "@(#)regex.c 5.1 (Berkeley) 3/29/92"; 451578Srgrimes#endif /* LIBC_SCCS and not lint */ 461578Srgrimes 47205146Sed#include <regex.h> 481578Srgrimes#include <stddef.h> 49205146Sed#include <unistd.h> 501578Srgrimes 51205146Sedstatic regex_t re_regexp; 52205146Sedstatic int re_gotexp; 53205146Sedstatic char re_errstr[100]; 541578Srgrimes 551578Srgrimeschar * 56205146Sedre_comp(const char *s) 571578Srgrimes{ 58205146Sed int rc; 59205146Sed 602768Sache if (s == NULL || *s == '\0') { 61205146Sed if (!re_gotexp) 62205146Sed return __DECONST(char *, 63205146Sed "no previous regular expression"); 641578Srgrimes return (NULL); 652768Sache } 66205146Sed 67205146Sed if (re_gotexp) { 68205146Sed regfree(&re_regexp); 69205146Sed re_gotexp = 0; 70205146Sed } 71205146Sed 72205146Sed rc = regcomp(&re_regexp, s, REG_EXTENDED); 73205146Sed if (rc == 0) { 74205146Sed re_gotexp = 1; 75205146Sed return (NULL); 76205146Sed } 77205146Sed 78205146Sed regerror(rc, &re_regexp, re_errstr, sizeof(re_errstr)); 79205146Sed re_errstr[sizeof(re_errstr) - 1] = '\0'; 80205146Sed return (re_errstr); 811578Srgrimes} 821578Srgrimes 831578Srgrimesint 84205146Sedre_exec(const char *s) 851578Srgrimes{ 861578Srgrimes int rc; 871578Srgrimes 88205146Sed if (!re_gotexp) 89205146Sed return (-1); 90205146Sed rc = regexec(&re_regexp, s, 0, NULL, 0); 91205146Sed return (rc == 0 ? 1 : 0); 921578Srgrimes} 93