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 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 38 */ 39 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 43 #else 44 static char rcsid[] = "$OpenBSD: regerror.c,v 1.5 1998/03/19 00:30:10 millert Exp $"; 45 #endif 46 #endif /* LIBC_SCCS and not lint */ 47 48 #include <sys/types.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <ctype.h> 52 #include <limits.h> 53 #include <stdlib.h> 54 #include <regex.h> 55 56 #include "utils.h" 57 58 /* ========= begin header generated by ./mkh ========= */ 59 #ifdef __cplusplus 60 extern "C" { 61 #endif 62 63 /* === regerror.c === */ 64 static char *regatoi __P((const regex_t *preg, char *localbuf)); 65 66 #ifdef __cplusplus 67 } 68 #endif 69 /* ========= end header generated by ./mkh ========= */ 70 /* 71 = #define REG_NOMATCH 1 72 = #define REG_BADPAT 2 73 = #define REG_ECOLLATE 3 74 = #define REG_ECTYPE 4 75 = #define REG_EESCAPE 5 76 = #define REG_ESUBREG 6 77 = #define REG_EBRACK 7 78 = #define REG_EPAREN 8 79 = #define REG_EBRACE 9 80 = #define REG_BADBR 10 81 = #define REG_ERANGE 11 82 = #define REG_ESPACE 12 83 = #define REG_BADRPT 13 84 = #define REG_EMPTY 14 85 = #define REG_ASSERT 15 86 = #define REG_INVARG 16 87 = #define REG_ATOI 255 // convert name to number (!) 88 = #define REG_ITOA 0400 // convert number to name (!) 89 */ 90 static struct rerr { 91 int code; 92 char *name; 93 char *explain; 94 } rerrs[] = { 95 { REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, 96 { REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, 97 { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, 98 { REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, 99 { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, 100 { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, 101 { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, 102 { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, 103 { REG_EBRACE, "REG_EBRACE", "braces not balanced" }, 104 { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, 105 { REG_ERANGE, "REG_ERANGE", "invalid character range" }, 106 { REG_ESPACE, "REG_ESPACE", "out of memory" }, 107 { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, 108 { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, 109 { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, 110 { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, 111 { 0, "", "*** unknown regexp error code ***" } 112 }; 113 114 /* 115 - regerror - the interface to error numbers 116 = extern size_t regerror(int, const regex_t *, char *, size_t); 117 */ 118 /* ARGSUSED */ 119 size_t 120 regerror(errcode, preg, errbuf, errbuf_size) 121 int errcode; 122 const regex_t *preg; 123 char *errbuf; 124 size_t errbuf_size; 125 { 126 register struct rerr *r; 127 register size_t len; 128 register int target = errcode &~ REG_ITOA; 129 register char *s; 130 char convbuf[50]; 131 132 if (errcode == REG_ATOI) 133 s = regatoi(preg, convbuf); 134 else { 135 for (r = rerrs; r->code != 0; r++) 136 if (r->code == target) 137 break; 138 139 if (errcode®_ITOA) { 140 if (r->code != 0) { 141 assert(strlen(r->name) < sizeof(convbuf)); 142 (void) strcpy(convbuf, r->name); 143 } else 144 (void)sprintf(convbuf, "REG_0x%x", target); 145 s = convbuf; 146 } else 147 s = r->explain; 148 } 149 150 len = strlen(s) + 1; 151 if (errbuf_size > 0) { 152 (void) strncpy(errbuf, s, errbuf_size-1); 153 errbuf[errbuf_size-1] = '\0'; 154 } 155 156 return(len); 157 } 158 159 /* 160 - regatoi - internal routine to implement REG_ATOI 161 == static char *regatoi(const regex_t *preg, char *localbuf); 162 */ 163 static char * 164 regatoi(preg, localbuf) 165 const regex_t *preg; 166 char *localbuf; 167 { 168 register struct rerr *r; 169 170 for (r = rerrs; r->code != 0; r++) 171 if (strcmp(r->name, preg->re_endp) == 0) 172 break; 173 if (r->code == 0) 174 return("0"); 175 176 (void)sprintf(localbuf, "%d", r->code); 177 return(localbuf); 178 } 179