regerror.c revision 132017
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) 41static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 42#endif /* LIBC_SCCS and not lint */ 43#include <sys/cdefs.h> 44__FBSDID("$FreeBSD: head/lib/libc/regex/regerror.c 132017 2004-07-12 06:07:26Z tjr $"); 45 46#include <sys/types.h> 47#include <stdio.h> 48#include <string.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 57extern "C" { 58#endif 59 60/* === regerror.c === */ 61static char *regatoi(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_ILLSEQ 17 85 = #define REG_ATOI 255 // convert name to number (!) 86 = #define REG_ITOA 0400 // convert number to name (!) 87 */ 88static struct rerr { 89 int code; 90 char *name; 91 char *explain; 92} rerrs[] = { 93 {REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match"}, 94 {REG_BADPAT, "REG_BADPAT", "invalid regular expression"}, 95 {REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element"}, 96 {REG_ECTYPE, "REG_ECTYPE", "invalid character class"}, 97 {REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)"}, 98 {REG_ESUBREG, "REG_ESUBREG", "invalid backreference number"}, 99 {REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced"}, 100 {REG_EPAREN, "REG_EPAREN", "parentheses not balanced"}, 101 {REG_EBRACE, "REG_EBRACE", "braces not balanced"}, 102 {REG_BADBR, "REG_BADBR", "invalid repetition count(s)"}, 103 {REG_ERANGE, "REG_ERANGE", "invalid character range"}, 104 {REG_ESPACE, "REG_ESPACE", "out of memory"}, 105 {REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid"}, 106 {REG_EMPTY, "REG_EMPTY", "empty (sub)expression"}, 107 {REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug"}, 108 {REG_INVARG, "REG_INVARG", "invalid argument to regex routine"}, 109 {REG_ILLSEQ, "REG_ILLSEQ", "illegal byte sequence"}, 110 {0, "", "*** unknown regexp error code ***"} 111}; 112 113/* 114 - regerror - the interface to error numbers 115 = extern size_t regerror(int, const regex_t *, char *, size_t); 116 */ 117/* ARGSUSED */ 118size_t 119regerror(errcode, preg, errbuf, errbuf_size) 120int errcode; 121const regex_t * __restrict preg; 122char * __restrict errbuf; 123size_t errbuf_size; 124{ 125 struct rerr *r; 126 size_t len; 127 int target = errcode &~ REG_ITOA; 128 char *s; 129 char convbuf[50]; 130 131 if (errcode == REG_ATOI) 132 s = regatoi(preg, convbuf); 133 else { 134 for (r = rerrs; r->code != 0; r++) 135 if (r->code == target) 136 break; 137 138 if (errcode®_ITOA) { 139 if (r->code != 0) 140 (void) strcpy(convbuf, r->name); 141 else 142 sprintf(convbuf, "REG_0x%x", target); 143 assert(strlen(convbuf) < sizeof(convbuf)); 144 s = convbuf; 145 } else 146 s = r->explain; 147 } 148 149 len = strlen(s) + 1; 150 if (errbuf_size > 0) { 151 if (errbuf_size > len) 152 (void) strcpy(errbuf, s); 153 else { 154 (void) strncpy(errbuf, s, errbuf_size-1); 155 errbuf[errbuf_size-1] = '\0'; 156 } 157 } 158 159 return(len); 160} 161 162/* 163 - regatoi - internal routine to implement REG_ATOI 164 == static char *regatoi(const regex_t *preg, char *localbuf); 165 */ 166static char * 167regatoi(preg, localbuf) 168const regex_t *preg; 169char *localbuf; 170{ 171 struct rerr *r; 172 173 for (r = rerrs; r->code != 0; r++) 174 if (strcmp(r->name, preg->re_endp) == 0) 175 break; 176 if (r->code == 0) 177 return("0"); 178 179 sprintf(localbuf, "%d", r->code); 180 return(localbuf); 181} 182