regerror.c revision 165903
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 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 34 */ 35 36#if defined(LIBC_SCCS) && !defined(lint) 37static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 38#endif /* LIBC_SCCS and not lint */ 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: head/lib/libc/regex/regerror.c 165903 2007-01-09 00:28:16Z imp $"); 41 42#include <sys/types.h> 43#include <stdio.h> 44#include <string.h> 45#include <limits.h> 46#include <stdlib.h> 47#include <regex.h> 48 49#include "utils.h" 50 51/* ========= begin header generated by ./mkh ========= */ 52#ifdef __cplusplus 53extern "C" { 54#endif 55 56/* === regerror.c === */ 57static char *regatoi(const regex_t *preg, char *localbuf); 58 59#ifdef __cplusplus 60} 61#endif 62/* ========= end header generated by ./mkh ========= */ 63/* 64 = #define REG_NOMATCH 1 65 = #define REG_BADPAT 2 66 = #define REG_ECOLLATE 3 67 = #define REG_ECTYPE 4 68 = #define REG_EESCAPE 5 69 = #define REG_ESUBREG 6 70 = #define REG_EBRACK 7 71 = #define REG_EPAREN 8 72 = #define REG_EBRACE 9 73 = #define REG_BADBR 10 74 = #define REG_ERANGE 11 75 = #define REG_ESPACE 12 76 = #define REG_BADRPT 13 77 = #define REG_EMPTY 14 78 = #define REG_ASSERT 15 79 = #define REG_INVARG 16 80 = #define REG_ILLSEQ 17 81 = #define REG_ATOI 255 // convert name to number (!) 82 = #define REG_ITOA 0400 // convert number to name (!) 83 */ 84static 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 {REG_ILLSEQ, "REG_ILLSEQ", "illegal byte sequence"}, 106 {0, "", "*** unknown regexp error code ***"} 107}; 108 109/* 110 - regerror - the interface to error numbers 111 = extern size_t regerror(int, const regex_t *, char *, size_t); 112 */ 113/* ARGSUSED */ 114size_t 115regerror(errcode, preg, errbuf, errbuf_size) 116int errcode; 117const regex_t * __restrict preg; 118char * __restrict errbuf; 119size_t errbuf_size; 120{ 121 struct rerr *r; 122 size_t len; 123 int target = errcode &~ REG_ITOA; 124 char *s; 125 char convbuf[50]; 126 127 if (errcode == REG_ATOI) 128 s = regatoi(preg, convbuf); 129 else { 130 for (r = rerrs; r->code != 0; r++) 131 if (r->code == target) 132 break; 133 134 if (errcode®_ITOA) { 135 if (r->code != 0) 136 (void) strcpy(convbuf, r->name); 137 else 138 sprintf(convbuf, "REG_0x%x", target); 139 assert(strlen(convbuf) < sizeof(convbuf)); 140 s = convbuf; 141 } else 142 s = r->explain; 143 } 144 145 len = strlen(s) + 1; 146 if (errbuf_size > 0) { 147 if (errbuf_size > len) 148 (void) strcpy(errbuf, s); 149 else { 150 (void) strncpy(errbuf, s, errbuf_size-1); 151 errbuf[errbuf_size-1] = '\0'; 152 } 153 } 154 155 return(len); 156} 157 158/* 159 - regatoi - internal routine to implement REG_ATOI 160 == static char *regatoi(const regex_t *preg, char *localbuf); 161 */ 162static char * 163regatoi(preg, localbuf) 164const regex_t *preg; 165char *localbuf; 166{ 167 struct rerr *r; 168 169 for (r = rerrs; r->code != 0; r++) 170 if (strcmp(r->name, preg->re_endp) == 0) 171 break; 172 if (r->code == 0) 173 return("0"); 174 175 sprintf(localbuf, "%d", r->code); 176 return(localbuf); 177} 178