regerror.c revision 1.20
1 /* $NetBSD: regerror.c,v 1.20 2005/12/02 12:12:29 yamt 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 1.20 2005/12/02 12:12:29 yamt 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 const char *regatoi __P((const regex_t *preg, char *localbuf, 107 size_t buflen)); 108 109 #ifdef __cplusplus 110 } 111 #endif 112 /* ========= end header generated by ./mkh ========= */ 113 /* 114 = #define REG_NOMATCH 1 115 = #define REG_BADPAT 2 116 = #define REG_ECOLLATE 3 117 = #define REG_ECTYPE 4 118 = #define REG_EESCAPE 5 119 = #define REG_ESUBREG 6 120 = #define REG_EBRACK 7 121 = #define REG_EPAREN 8 122 = #define REG_EBRACE 9 123 = #define REG_BADBR 10 124 = #define REG_ERANGE 11 125 = #define REG_ESPACE 12 126 = #define REG_BADRPT 13 127 = #define REG_EMPTY 14 128 = #define REG_ASSERT 15 129 = #define REG_INVARG 16 130 = #define REG_ATOI 255 // convert name to number (!) 131 = #define REG_ITOA 0400 // convert number to name (!) 132 */ 133 static const struct rerr { 134 int code; 135 const char *name; 136 const char *explain; 137 } rerrs[] = { 138 { REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, 139 { REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, 140 { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, 141 { REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, 142 { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, 143 { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, 144 { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, 145 { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, 146 { REG_EBRACE, "REG_EBRACE", "braces not balanced" }, 147 { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, 148 { REG_ERANGE, "REG_ERANGE", "invalid character range" }, 149 { REG_ESPACE, "REG_ESPACE", "out of memory" }, 150 { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, 151 { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, 152 { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, 153 { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, 154 { 0, "", "*** unknown regexp error code ***" } 155 }; 156 157 /* 158 * regerror - the interface to error numbers 159 * extern size_t regerror(int, const regex_t *, char *, size_t); 160 */ 161 /* ARGSUSED */ 162 size_t 163 regerror(errcode, preg, errbuf, errbuf_size) 164 int errcode; 165 const regex_t *preg; 166 char *errbuf; 167 size_t errbuf_size; 168 { 169 const struct rerr *r; 170 size_t len; 171 int target = errcode &~ REG_ITOA; 172 const char *s; 173 char convbuf[50]; 174 175 _DIAGASSERT(errcode != REG_ATOI || preg != NULL); 176 _DIAGASSERT(errbuf != NULL); 177 178 if (errcode == REG_ATOI) 179 s = regatoi(preg, convbuf, sizeof convbuf); 180 else { 181 for (r = rerrs; r->code != 0; r++) 182 if (r->code == target) 183 break; 184 185 if (errcode & REG_ITOA) { 186 if (r->code != 0) { 187 (void)strlcpy(convbuf, r->name, sizeof convbuf); 188 } else 189 (void)snprintf(convbuf, sizeof convbuf, 190 "REG_0x%x", target); 191 s = convbuf; 192 } else 193 s = r->explain; 194 } 195 196 len = strlen(s) + 1; 197 if (errbuf_size > 0) 198 (void)strlcpy(errbuf, s, errbuf_size); 199 200 return(len); 201 } 202 203 /* 204 * regatoi - internal routine to implement REG_ATOI 205 * static const char *regatoi(const regex_t *preg, char *localbuf, 206 * size_t buflen); 207 */ 208 static const char * 209 regatoi(preg, localbuf, buflen) 210 const regex_t *preg; 211 char *localbuf; 212 size_t buflen; 213 { 214 const struct rerr *r; 215 216 for (r = rerrs; r->code != 0; r++) 217 if (strcmp(r->name, preg->re_endp) == 0) 218 break; 219 if (r->code == 0) 220 return "0"; 221 222 (void)snprintf(localbuf, buflen, "%d", r->code); 223 return localbuf; 224 } 225
Indexes created Sun Sep 21 16:09:51 GMT 2025