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. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #if defined(LIBC_SCCS) && !defined(lint) 39 static char rcsid[] = "$OpenBSD: regerror.c,v 1.3 1996/09/15 09:31:26 tholo Exp $"; 40 #endif /* LIBC_SCCS and not lint */ 41 42 #include <sys/types.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <ctype.h> 46 #include <limits.h> 47 #include <stdlib.h> 48 #include <regex.h> 49 50 #include "utils.h" 51 52 /* ========= begin header generated by ./mkh ========= */ 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 /* === regerror.c === */ 58 static char *regatoi __P((const regex_t *preg, char *localbuf)); 59 60 #ifdef __cplusplus 61 } 62 #endif 63 /* ========= end header generated by ./mkh ========= */ 64 /* 65 = #define REG_NOMATCH 1 66 = #define REG_BADPAT 2 67 = #define REG_ECOLLATE 3 68 = #define REG_ECTYPE 4 69 = #define REG_EESCAPE 5 70 = #define REG_ESUBREG 6 71 = #define REG_EBRACK 7 72 = #define REG_EPAREN 8 73 = #define REG_EBRACE 9 74 = #define REG_BADBR 10 75 = #define REG_ERANGE 11 76 = #define REG_ESPACE 12 77 = #define REG_BADRPT 13 78 = #define REG_EMPTY 14 79 = #define REG_ASSERT 15 80 = #define REG_INVARG 16 81 = #define REG_ATOI 255 // convert name to number (!) 82 = #define REG_ITOA 0400 // convert number to name (!) 83 */ 84 static struct rerr { 85 int code; 86 char *name; 87 char *explain; 88 } rerrs[] = { 89 REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match", 90 REG_BADPAT, "REG_BADPAT", "invalid regular expression", 91 REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element", 92 REG_ECTYPE, "REG_ECTYPE", "invalid character class", 93 REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)", 94 REG_ESUBREG, "REG_ESUBREG", "invalid backreference number", 95 REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced", 96 REG_EPAREN, "REG_EPAREN", "parentheses not balanced", 97 REG_EBRACE, "REG_EBRACE", "braces not balanced", 98 REG_BADBR, "REG_BADBR", "invalid repetition count(s)", 99 REG_ERANGE, "REG_ERANGE", "invalid character range", 100 REG_ESPACE, "REG_ESPACE", "out of memory", 101 REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid", 102 REG_EMPTY, "REG_EMPTY", "empty (sub)expression", 103 REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug", 104 REG_INVARG, "REG_INVARG", "invalid argument to regex routine", 105 0, "", "*** unknown regexp error code ***", 106 }; 107 108 /* 109 - regerror - the interface to error numbers 110 = extern size_t regerror(int, const regex_t *, char *, size_t); 111 */ 112 /* ARGSUSED */ 113 size_t 114 regerror(errcode, preg, errbuf, errbuf_size) 115 int errcode; 116 const regex_t *preg; 117 char *errbuf; 118 size_t errbuf_size; 119 { 120 register struct rerr *r; 121 register size_t len; 122 register int target = errcode &~ REG_ITOA; 123 register char *s; 124 char convbuf[50]; 125 126 if (errcode == REG_ATOI) 127 s = regatoi(preg, convbuf); 128 else { 129 for (r = rerrs; r->code != 0; r++) 130 if (r->code == target) 131 break; 132 133 if (errcode®_ITOA) { 134 if (r->code != 0) 135 (void) strcpy(convbuf, r->name); 136 else 137 sprintf(convbuf, "REG_0x%x", target); 138 assert(strlen(convbuf) < sizeof(convbuf)); 139 s = convbuf; 140 } else 141 s = r->explain; 142 } 143 144 len = strlen(s) + 1; 145 if (errbuf_size > 0) { 146 if (errbuf_size > len) 147 (void) strcpy(errbuf, s); 148 else { 149 (void) strncpy(errbuf, s, errbuf_size-1); 150 errbuf[errbuf_size-1] = '\0'; 151 } 152 } 153 154 return(len); 155 } 156 157 /* 158 - regatoi - internal routine to implement REG_ATOI 159 == static char *regatoi(const regex_t *preg, char *localbuf); 160 */ 161 static char * 162 regatoi(preg, localbuf) 163 const regex_t *preg; 164 char *localbuf; 165 { 166 register struct rerr *r; 167 168 for (r = rerrs; r->code != 0; r++) 169 if (strcmp(r->name, preg->re_endp) == 0) 170 break; 171 if (r->code == 0) 172 return("0"); 173 174 sprintf(localbuf, "%d", r->code); 175 return(localbuf); 176 } 177