1 /*- 2 * Copyright (c) 1992, 1993, 1994 Henry Spencer. 3 * Copyright (c) 1992, 1993, 1994 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Henry Spencer. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 34 */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 39 #else 40 static char rcsid[] = "$OpenBSD: regerror.c,v 1.10 2003/06/02 20:18:36 millert Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <sys/types.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <ctype.h> 48 #include <limits.h> 49 #include <stdlib.h> 50 #include <regex.h> 51 52 #include "utils.h" 53 54 /* ========= begin header generated by ./mkh ========= */ 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 /* === regerror.c === */ 60 static char *regatoi(const regex_t *preg, char *localbuf, int localbufsize); 61 62 #ifdef __cplusplus 63 } 64 #endif 65 /* ========= end header generated by ./mkh ========= */ 66 /* 67 = #define REG_NOMATCH 1 68 = #define REG_BADPAT 2 69 = #define REG_ECOLLATE 3 70 = #define REG_ECTYPE 4 71 = #define REG_EESCAPE 5 72 = #define REG_ESUBREG 6 73 = #define REG_EBRACK 7 74 = #define REG_EPAREN 8 75 = #define REG_EBRACE 9 76 = #define REG_BADBR 10 77 = #define REG_ERANGE 11 78 = #define REG_ESPACE 12 79 = #define REG_BADRPT 13 80 = #define REG_EMPTY 14 81 = #define REG_ASSERT 15 82 = #define REG_INVARG 16 83 = #define REG_ATOI 255 // convert name to number (!) 84 = #define REG_ITOA 0400 // convert number to name (!) 85 */ 86 static struct rerr { 87 int code; 88 char *name; 89 char *explain; 90 } rerrs[] = { 91 { REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, 92 { REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, 93 { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, 94 { REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, 95 { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, 96 { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, 97 { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, 98 { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, 99 { REG_EBRACE, "REG_EBRACE", "braces not balanced" }, 100 { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, 101 { REG_ERANGE, "REG_ERANGE", "invalid character range" }, 102 { REG_ESPACE, "REG_ESPACE", "out of memory" }, 103 { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, 104 { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, 105 { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, 106 { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, 107 { 0, "", "*** unknown regexp error code ***" } 108 }; 109 110 /* 111 - regerror - the interface to error numbers 112 = extern size_t regerror(int, const regex_t *, char *, size_t); 113 */ 114 /* ARGSUSED */ 115 size_t 116 regerror(errcode, preg, errbuf, errbuf_size) 117 int errcode; 118 const regex_t *preg; 119 char *errbuf; 120 size_t errbuf_size; 121 { 122 register struct rerr *r; 123 register size_t len; 124 register int target = errcode &~ REG_ITOA; 125 register char *s; 126 char convbuf[50]; 127 128 if (errcode == REG_ATOI) 129 s = regatoi(preg, convbuf, sizeof convbuf); 130 else { 131 for (r = rerrs; r->code != 0; r++) 132 if (r->code == target) 133 break; 134 135 if (errcode®_ITOA) { 136 if (r->code != 0) { 137 assert(strlen(r->name) < sizeof(convbuf)); 138 (void) strlcpy(convbuf, r->name, sizeof convbuf); 139 } else 140 (void)snprintf(convbuf, sizeof convbuf, 141 "REG_0x%x", target); 142 s = convbuf; 143 } else 144 s = r->explain; 145 } 146 147 len = strlen(s) + 1; 148 if (errbuf_size > 0) { 149 strlcpy(errbuf, s, errbuf_size); 150 } 151 152 return(len); 153 } 154 155 /* 156 - regatoi - internal routine to implement REG_ATOI 157 == static char *regatoi(const regex_t *preg, char *localbuf); 158 */ 159 static char * 160 regatoi(preg, localbuf, localbufsize) 161 const regex_t *preg; 162 char *localbuf; 163 int localbufsize; 164 { 165 register struct rerr *r; 166 167 for (r = rerrs; r->code != 0; r++) 168 if (strcmp(r->name, preg->re_endp) == 0) 169 break; 170 if (r->code == 0) 171 return("0"); 172 173 (void)snprintf(localbuf, localbufsize, "%d", r->code); 174 return(localbuf); 175 } 176