regerror.c revision 1574
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 44#include <sys/types.h> 45#include <stdio.h> 46#include <string.h> 47#include <ctype.h> 48#include <limits.h> 49#include <stdlib.h> 50#include <regex.h> 51 52#include "utils.h" 53 54/* ========= begin header generated by ./mkh ========= */ 55#ifdef __cplusplus 56extern "C" { 57#endif 58 59/* === regerror.c === */ 60static char *regatoi __P((const regex_t *preg, char *localbuf)); 61 62#ifdef __cplusplus 63} 64#endif 65/* ========= end header generated by ./mkh ========= */ 66/* 67 = #define REG_NOMATCH 1 68 = #define REG_BADPAT 2 69 = #define REG_ECOLLATE 3 70 = #define REG_ECTYPE 4 71 = #define REG_EESCAPE 5 72 = #define REG_ESUBREG 6 73 = #define REG_EBRACK 7 74 = #define REG_EPAREN 8 75 = #define REG_EBRACE 9 76 = #define REG_BADBR 10 77 = #define REG_ERANGE 11 78 = #define REG_ESPACE 12 79 = #define REG_BADRPT 13 80 = #define REG_EMPTY 14 81 = #define REG_ASSERT 15 82 = #define REG_INVARG 16 83 = #define REG_ATOI 255 // convert name to number (!) 84 = #define REG_ITOA 0400 // convert number to name (!) 85 */ 86static struct rerr { 87 int code; 88 char *name; 89 char *explain; 90} rerrs[] = { 91 REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match", 92 REG_BADPAT, "REG_BADPAT", "invalid regular expression", 93 REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element", 94 REG_ECTYPE, "REG_ECTYPE", "invalid character class", 95 REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)", 96 REG_ESUBREG, "REG_ESUBREG", "invalid backreference number", 97 REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced", 98 REG_EPAREN, "REG_EPAREN", "parentheses not balanced", 99 REG_EBRACE, "REG_EBRACE", "braces not balanced", 100 REG_BADBR, "REG_BADBR", "invalid repetition count(s)", 101 REG_ERANGE, "REG_ERANGE", "invalid character range", 102 REG_ESPACE, "REG_ESPACE", "out of memory", 103 REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid", 104 REG_EMPTY, "REG_EMPTY", "empty (sub)expression", 105 REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug", 106 REG_INVARG, "REG_INVARG", "invalid argument to regex routine", 107 0, "", "*** unknown regexp error code ***", 108}; 109 110/* 111 - regerror - the interface to error numbers 112 = extern size_t regerror(int, const regex_t *, char *, size_t); 113 */ 114/* ARGSUSED */ 115size_t 116regerror(errcode, preg, errbuf, errbuf_size) 117int errcode; 118const regex_t *preg; 119char *errbuf; 120size_t errbuf_size; 121{ 122 register struct rerr *r; 123 register size_t len; 124 register int target = errcode &~ REG_ITOA; 125 register char *s; 126 char convbuf[50]; 127 128 if (errcode == REG_ATOI) 129 s = regatoi(preg, convbuf); 130 else { 131 for (r = rerrs; r->code != 0; r++) 132 if (r->code == target) 133 break; 134 135 if (errcode®_ITOA) { 136 if (r->code != 0) 137 (void) strcpy(convbuf, r->name); 138 else 139 sprintf(convbuf, "REG_0x%x", target); 140 assert(strlen(convbuf) < sizeof(convbuf)); 141 s = convbuf; 142 } else 143 s = r->explain; 144 } 145 146 len = strlen(s) + 1; 147 if (errbuf_size > 0) { 148 if (errbuf_size > len) 149 (void) strcpy(errbuf, s); 150 else { 151 (void) strncpy(errbuf, s, errbuf_size-1); 152 errbuf[errbuf_size-1] = '\0'; 153 } 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 */ 163static char * 164regatoi(preg, localbuf) 165const regex_t *preg; 166char *localbuf; 167{ 168 register struct rerr *r; 169 register size_t siz; 170 register char *p; 171 172 for (r = rerrs; r->code != 0; r++) 173 if (strcmp(r->name, preg->re_endp) == 0) 174 break; 175 if (r->code == 0) 176 return("0"); 177 178 sprintf(localbuf, "%d", r->code); 179 return(localbuf); 180} 181