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 --- 17 unchanged lines hidden (view full) --- 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> |
34__FBSDID("$FreeBSD: head/lib/libcompat/4.3/re_comp.c 205146 2010-03-14 10:18:58Z ed $"); |
35 36/* 37 * Compatibility routines that implement the old re_comp/re_exec interface in 38 * terms of the regcomp/regexec interface. It's possible that some programs 39 * rely on dark corners of re_comp/re_exec and won't work with this version, 40 * but most programs should be fine. 41 */ 42 43#if defined(LIBC_SCCS) && !defined(lint) 44static char sccsid[] = "@(#)regex.c 5.1 (Berkeley) 3/29/92"; 45#endif /* LIBC_SCCS and not lint */ 46 |
47#include <regex.h> |
48#include <stddef.h> |
49#include <unistd.h> |
50 |
51static regex_t re_regexp; 52static int re_gotexp; 53static char re_errstr[100]; |
54 55char * |
56re_comp(const char *s) |
57{ |
58 int rc; 59 |
60 if (s == NULL || *s == '\0') { |
61 if (!re_gotexp) 62 return __DECONST(char *, 63 "no previous regular expression"); |
64 return (NULL); 65 } |
66 67 if (re_gotexp) { 68 regfree(&re_regexp); 69 re_gotexp = 0; 70 } 71 72 rc = regcomp(&re_regexp, s, REG_EXTENDED); 73 if (rc == 0) { 74 re_gotexp = 1; 75 return (NULL); 76 } 77 78 regerror(rc, &re_regexp, re_errstr, sizeof(re_errstr)); 79 re_errstr[sizeof(re_errstr) - 1] = '\0'; 80 return (re_errstr); |
81} 82 83int |
84re_exec(const char *s) |
85{ 86 int rc; 87 |
88 if (!re_gotexp) 89 return (-1); 90 rc = regexec(&re_regexp, s, 0, NULL, 0); 91 return (rc == 0 ? 1 : 0); |
92} |