1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993, 1994 Henry Spencer. 5 * Copyright (c) 1992, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Henry Spencer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 36 */ 37 38#if defined(LIBC_SCCS) && !defined(lint) 39static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 40#endif /* LIBC_SCCS and not lint */ 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD$"); 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 const char *regatoi(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_ILLSEQ 17 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 const char *name; 89 const 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 {REG_ILLSEQ, "REG_ILLSEQ", "illegal byte sequence"}, 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(int errcode, 118 const regex_t * __restrict preg, 119 char * __restrict errbuf, 120 size_t errbuf_size) 121{ 122 struct rerr *r; 123 size_t len; 124 int target = errcode &~ REG_ITOA; 125 const 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 const char * 164regatoi(const regex_t *preg, char *localbuf) 165{ 166 struct rerr *r; 167 168 for (r = rerrs; r->code != 0; r++) 169 if (strcmp(r->name, preg->re_endp) == 0) 170 break; 171 if (r->code == 0) 172 return("0"); 173 174 sprintf(localbuf, "%d", r->code); 175 return(localbuf); 176} 177