regerror.c revision 1.18
1 /* $NetBSD: regerror.c,v 1.18 2003/08/07 16:43:20 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Henry Spencer. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 35 */ 36 37 /*- 38 * Copyright (c) 1992, 1993, 1994 Henry Spencer. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Henry Spencer. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 72 */ 73 74 #include <sys/cdefs.h> 75 #if defined(LIBC_SCCS) && !defined(lint) 76 #if 0 77 static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 78 #else 79 __RCSID("$NetBSD: regerror.c,v 1.18 2003/08/07 16:43:20 agc Exp $"); 80 #endif 81 #endif /* LIBC_SCCS and not lint */ 82 83 #include "namespace.h" 84 #include <sys/types.h> 85 86 #include <assert.h> 87 #include <ctype.h> 88 #include <limits.h> 89 #include <regex.h> 90 #include <stdio.h> 91 #include <stdlib.h> 92 #include <string.h> 93 94 #ifdef __weak_alias 95 __weak_alias(regerror,_regerror) 96 #endif 97 98 #include "utils.h" 99 100 /* ========= begin header generated by ./mkh ========= */ 101 #ifdef __cplusplus 102 extern "C" { 103 #endif 104 105 /* === regerror.c === */ 106 static char *regatoi __P((const regex_t *preg, char *localbuf, size_t buflen)); 107 108 #ifdef __cplusplus 109 } 110 #endif 111 /* ========= end header generated by ./mkh ========= */ 112 /* 113 = #define REG_NOMATCH 1 114 = #define REG_BADPAT 2 115 = #define REG_ECOLLATE 3 116 = #define REG_ECTYPE 4 117 = #define REG_EESCAPE 5 118 = #define REG_ESUBREG 6 119 = #define REG_EBRACK 7 120 = #define REG_EPAREN 8 121 = #define REG_EBRACE 9 122 = #define REG_BADBR 10 123 = #define REG_ERANGE 11 124 = #define REG_ESPACE 12 125 = #define REG_BADRPT 13 126 = #define REG_EMPTY 14 127 = #define REG_ASSERT 15 128 = #define REG_INVARG 16 129 = #define REG_ATOI 255 // convert name to number (!) 130 = #define REG_ITOA 0400 // convert number to name (!) 131 */ 132 static const struct rerr { 133 int code; 134 const char *name; 135 const char *explain; 136 } rerrs[] = { 137 { REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, 138 { REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, 139 { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, 140 { REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, 141 { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, 142 { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, 143 { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, 144 { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, 145 { REG_EBRACE, "REG_EBRACE", "braces not balanced" }, 146 { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, 147 { REG_ERANGE, "REG_ERANGE", "invalid character range" }, 148 { REG_ESPACE, "REG_ESPACE", "out of memory" }, 149 { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, 150 { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, 151 { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, 152 { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, 153 { 0, "", "*** unknown regexp error code ***" } 154 }; 155 156 /* 157 * regerror - the interface to error numbers 158 * extern size_t regerror(int, const regex_t *, char *, size_t); 159 */ 160 /* ARGSUSED */ 161 size_t 162 regerror(errcode, preg, errbuf, errbuf_size) 163 int errcode; 164 const regex_t *preg; 165 char *errbuf; 166 size_t errbuf_size; 167 { 168 const struct rerr *r; 169 size_t len; 170 int target = errcode &~ REG_ITOA; 171 const char *s; 172 char convbuf[50]; 173 174 _DIAGASSERT(errcode != REG_ATOI || preg != NULL); 175 _DIAGASSERT(errbuf != NULL); 176 177 if (errcode == REG_ATOI) 178 s = regatoi(preg, convbuf, sizeof convbuf); 179 else { 180 for (r = rerrs; r->code != 0; r++) 181 if (r->code == target) 182 break; 183 184 if (errcode & REG_ITOA) { 185 if (r->code != 0) { 186 (void)strlcpy(convbuf, r->name, sizeof convbuf); 187 } else 188 (void)snprintf(convbuf, sizeof convbuf, 189 "REG_0x%x", target); 190 s = convbuf; 191 } else 192 s = r->explain; 193 } 194 195 len = strlen(s) + 1; 196 if (errbuf_size > 0) 197 (void)strlcpy(errbuf, s, errbuf_size); 198 199 return(len); 200 } 201 202 /* 203 * regatoi - internal routine to implement REG_ATOI 204 * static char *regatoi(const regex_t *preg, char *localbuf, size_t buflen); 205 */ 206 static char * 207 regatoi(preg, localbuf, buflen) 208 const regex_t *preg; 209 char *localbuf; 210 size_t buflen; 211 { 212 const struct rerr *r; 213 214 for (r = rerrs; r->code != 0; r++) 215 if (strcmp(r->name, preg->re_endp) == 0) 216 break; 217 if (r->code == 0) 218 return("0"); 219 220 (void)snprintf(localbuf, buflen, "%d", r->code); 221 return(localbuf); 222 } 223
Indexes created Sun Sep 21 19:09:51 GMT 2025