regerror.c revision 104358
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 104358 2002-10-02 07:49:35Z mike $"); 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_ATOI 255 // convert name to number (!) 85 = #define REG_ITOA 0400 // convert number to name (!) 86 */ 87static struct rerr { 88 int code; 89 char *name; 90 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 */ 116size_t 117regerror(errcode, preg, errbuf, errbuf_size) 118int errcode; 119const regex_t * __restrict preg; 120char * __restrict errbuf; 121size_t errbuf_size; 122{ 123 struct rerr *r; 124 size_t len; 125 int target = errcode &~ REG_ITOA; 126 char *s; 127 char convbuf[50]; 128 129 if (errcode == REG_ATOI) 130 s = regatoi(preg, convbuf); 131 else { 132 for (r = rerrs; r->code != 0; r++) 133 if (r->code == target) 134 break; 135 136 if (errcode®_ITOA) { 137 if (r->code != 0) 138 (void) strcpy(convbuf, r->name); 139 else 140 sprintf(convbuf, "REG_0x%x", target); 141 assert(strlen(convbuf) < sizeof(convbuf)); 142 s = convbuf; 143 } else 144 s = r->explain; 145 } 146 147 len = strlen(s) + 1; 148 if (errbuf_size > 0) { 149 if (errbuf_size > len) 150 (void) strcpy(errbuf, s); 151 else { 152 (void) strncpy(errbuf, s, errbuf_size-1); 153 errbuf[errbuf_size-1] = '\0'; 154 } 155 } 156 157 return(len); 158} 159 160/* 161 - regatoi - internal routine to implement REG_ATOI 162 == static char *regatoi(const regex_t *preg, char *localbuf); 163 */ 164static char * 165regatoi(preg, localbuf) 166const regex_t *preg; 167char *localbuf; 168{ 169 struct rerr *r; 170 171 for (r = rerrs; r->code != 0; r++) 172 if (strcmp(r->name, preg->re_endp) == 0) 173 break; 174 if (r->code == 0) 175 return("0"); 176 177 sprintf(localbuf, "%d", r->code); 178 return(localbuf); 179} 180