1 /* $NetBSD: regerror.c,v 1.2 2013/11/22 15:52:06 christos Exp $ */ 2 /*- 3 * Copyright (c) 1992, 1993, 1994 Henry Spencer. 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 of the University of Toronto. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)regerror.c 8.3 (Berkeley) 3/19/94 39 */ 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 static char sccsid[] = "@(#)regerror.c 8.3 (Berkeley) 3/19/94"; 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/types.h> 46 #include <stdio.h> 47 #include <string.h> 48 #include <ctype.h> 49 #include <limits.h> 50 #include <stdlib.h> 51 #include <regex.h> 52 53 #include "utils.h" 54 55 /* ========= begin header generated by ./mkh ========= */ 56 #ifdef __cplusplus 57 extern "C" { 58 #endif 59 60 /* === regerror.c === */ 61 static char *regatoi __P((const regex_t *preg, char *localbuf)); 62 63 #ifdef __cplusplus 64 } 65 #endif 66 /* ========= end header generated by ./mkh ========= */ 67 /* 68 = #define REG_NOMATCH 1 69 = #define REG_BADPAT 2 70 = #define REG_ECOLLATE 3 71 = #define REG_ECTYPE 4 72 = #define REG_EESCAPE 5 73 = #define REG_ESUBREG 6 74 = #define REG_EBRACK 7 75 = #define REG_EPAREN 8 76 = #define REG_EBRACE 9 77 = #define REG_BADBR 10 78 = #define REG_ERANGE 11 79 = #define REG_ESPACE 12 80 = #define REG_BADRPT 13 81 = #define REG_EMPTY 14 82 = #define REG_ASSERT 15 83 = #define REG_INVARG 16 84 = #define REG_ATOI 255 // convert name to number (!) 85 = #define REG_ITOA 0400 // convert number to name (!) 86 */ 87 static struct rerr { 88 int code; 89 const char *name; 90 const char *explain; 91 } rerrs[] = { 92 { REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, 93 { REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, 94 { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, 95 { REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, 96 { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, 97 { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, 98 { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, 99 { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, 100 { REG_EBRACE, "REG_EBRACE", "braces not balanced" }, 101 { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, 102 { REG_ERANGE, "REG_ERANGE", "invalid character range" }, 103 { REG_ESPACE, "REG_ESPACE", "out of memory" }, 104 { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, 105 { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, 106 { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, 107 { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, 108 { 0, "", "*** unknown regexp error code ***" }, 109 }; 110 111 /* 112 - regerror - the interface to error numbers 113 = extern size_t regerror(int, const regex_t *, char *, size_t); 114 */ 115 /* ARGSUSED */ 116 size_t 117 regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size) 118 { 119 register struct rerr *r; 120 register size_t len; 121 register int target = errcode &~ REG_ITOA; 122 register const char *s; 123 char convbuf[50]; 124 125 if (errcode == REG_ATOI) 126 s = regatoi(preg, convbuf); 127 else { 128 for (r = rerrs; r->code != 0; r++) 129 if (r->code == target) 130 break; 131 132 if (errcode®_ITOA) { 133 if (r->code != 0) 134 (void) strcpy(convbuf, r->name); 135 else 136 sprintf(convbuf, "REG_0x%x", target); 137 assert(strlen(convbuf) < sizeof(convbuf)); 138 s = convbuf; 139 } else 140 s = r->explain; 141 } 142 143 len = strlen(s) + 1; 144 if (errbuf_size > 0) { 145 if (errbuf_size > len) 146 (void) strcpy(errbuf, s); 147 else { 148 (void) strncpy(errbuf, s, errbuf_size-1); 149 errbuf[errbuf_size-1] = '\0'; 150 } 151 } 152 153 return(len); 154 } 155 156 /* 157 - regatoi - internal routine to implement REG_ATOI 158 == static char *regatoi(const regex_t *preg, char *localbuf); 159 */ 160 static char * 161 regatoi(const regex_t *preg, char *localbuf) 162 { 163 #if 0 /* we don't seem to use this and it gives a warning. */ 164 register struct rerr *r; 165 register size_t siz; 166 register char *p; 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 #else 176 *localbuf = '\0'; 177 #endif 178 return(localbuf); 179 } 180