1 /*- 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * James da Silva at the University of Maryland at College Park. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 /* 38 * Compatibility routines that implement the old re_comp/re_exec interface in 39 * terms of the regcomp/regexec interface. It's possible that some programs 40 * rely on dark corners of re_comp/re_exec and won't work with this version, 41 * but most programs should be fine. 42 */ 43 44 #if defined(LIBC_SCCS) && !defined(lint) 45 /*static char sccsid[] = "from: @(#)regex.c 5.1 (Berkeley) 3/29/92";*/ 46 static char rcsid[] = "$Id: regex.c,v 1.3 1993/11/11 01:24:50 jtc Exp $"; 47 #endif /* LIBC_SCCS and not lint */ 48 49 #include <sys/types.h> 50 #include <stddef.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <regex.h> 54 55 static int compiled_regexp = 0; 56 static char errbuf[256]; 57 static regex_t rp; 58 59 char * 60 re_comp(s) 61 char *s; 62 { 63 int eval; 64 65 if (s == NULL) 66 return (NULL); 67 68 if (compiled_regexp) { 69 regfree(&rp); 70 compiled_regexp = 0; 71 } 72 73 if ((eval = regcomp(&rp, s, REG_NOSUB)) != 0) { 74 regerror (eval, &rp, errbuf, sizeof(errbuf)); 75 return errbuf; 76 } 77 78 compiled_regexp = 1; 79 return NULL; 80 } 81 82 int 83 re_exec(s) 84 char *s; 85 { 86 regmatch_t rm[1]; 87 int eval; 88 89 if ((eval = regexec(&rp, s, 0, rm, 0)) == 0) 90 return 1; 91 92 return eval == REG_NOMATCH ? 0 : -1; 93 } 94