regerror.c revision 49099
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 <limits.h> 48#include <stdlib.h> 49#include <regex.h> 50 51#include "utils.h" 52 53/* ========= begin header generated by ./mkh ========= */ 54#ifdef __cplusplus 55extern "C" { 56#endif 57 58/* === regerror.c === */ 59static char *regatoi __P((const regex_t *preg, char *localbuf)); 60 61#ifdef __cplusplus 62} 63#endif 64/* ========= end header generated by ./mkh ========= */ 65/* 66 = #define REG_NOMATCH 1 67 = #define REG_BADPAT 2 68 = #define REG_ECOLLATE 3 69 = #define REG_ECTYPE 4 70 = #define REG_EESCAPE 5 71 = #define REG_ESUBREG 6 72 = #define REG_EBRACK 7 73 = #define REG_EPAREN 8 74 = #define REG_EBRACE 9 75 = #define REG_BADBR 10 76 = #define REG_ERANGE 11 77 = #define REG_ESPACE 12 78 = #define REG_BADRPT 13 79 = #define REG_EMPTY 14 80 = #define REG_ASSERT 15 81 = #define REG_INVARG 16 82 = #define REG_ATOI 255 // convert name to number (!) 83 = #define REG_ITOA 0400 // convert number to name (!) 84 */ 85static struct rerr { 86 int code; 87 char *name; 88 char *explain; 89} rerrs[] = { 90 {REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match"}, 91 {REG_BADPAT, "REG_BADPAT", "invalid regular expression"}, 92 {REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element"}, 93 {REG_ECTYPE, "REG_ECTYPE", "invalid character class"}, 94 {REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)"}, 95 {REG_ESUBREG, "REG_ESUBREG", "invalid backreference number"}, 96 {REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced"}, 97 {REG_EPAREN, "REG_EPAREN", "parentheses not balanced"}, 98 {REG_EBRACE, "REG_EBRACE", "braces not balanced"}, 99 {REG_BADBR, "REG_BADBR", "invalid repetition count(s)"}, 100 {REG_ERANGE, "REG_ERANGE", "invalid character range"}, 101 {REG_ESPACE, "REG_ESPACE", "out of memory"}, 102 {REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid"}, 103 {REG_EMPTY, "REG_EMPTY", "empty (sub)expression"}, 104 {REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug"}, 105 {REG_INVARG, "REG_INVARG", "invalid argument to regex routine"}, 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 *preg; 118char *errbuf; 119size_t errbuf_size; 120{ 121 register struct rerr *r; 122 register size_t len; 123 register int target = errcode &~ REG_ITOA; 124 register 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 register 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