[444] | 1 | /*- |
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| 2 | * Copyright (c) 1992, 1993, 1994 Henry Spencer. |
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| 3 | * Copyright (c) 1992, 1993, 1994 |
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| 4 | * The Regents of the University of California. All rights reserved. |
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| 5 | * |
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| 6 | * This code is derived from software contributed to Berkeley by |
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| 7 | * Henry Spencer. |
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| 8 | * |
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| 9 | * Redistribution and use in source and binary forms, with or without |
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| 10 | * modification, are permitted provided that the following conditions |
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| 11 | * are met: |
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| 12 | * 1. Redistributions of source code must retain the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer. |
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 15 | * notice, this list of conditions and the following disclaimer in the |
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| 16 | * documentation and/or other materials provided with the distribution. |
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| 17 | * 4. Neither the name of the University nor the names of its contributors |
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| 18 | * may be used to endorse or promote products derived from this software |
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| 19 | * without specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 31 | * SUCH DAMAGE. |
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| 32 | * |
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| 33 | * @(#)regerror.c 8.4 (Berkeley) 3/20/94 |
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| 34 | */ |
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| 35 | |
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| 36 | #ifndef _NO_REGEX |
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| 37 | |
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| 38 | #if defined(LIBC_SCCS) && !defined(lint) |
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| 39 | static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; |
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| 40 | #endif /* LIBC_SCCS and not lint */ |
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| 41 | #include <sys/cdefs.h> |
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| 42 | |
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| 43 | #include <sys/types.h> |
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| 44 | #include <stdio.h> |
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| 45 | #include <string.h> |
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| 46 | #include <limits.h> |
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| 47 | #include <stdlib.h> |
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| 48 | #include <regex.h> |
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| 49 | |
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| 50 | #include "utils.h" |
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| 51 | |
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| 52 | /* ========= begin header generated by ./mkh ========= */ |
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| 53 | #ifdef __cplusplus |
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| 54 | extern "C" { |
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| 55 | #endif |
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| 56 | |
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| 57 | /* === regerror.c === */ |
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| 58 | static char *regatoi(const regex_t *preg, char *localbuf); |
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| 59 | |
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| 60 | #ifdef __cplusplus |
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| 61 | } |
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| 62 | #endif |
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| 63 | /* ========= end header generated by ./mkh ========= */ |
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| 64 | /* |
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| 65 | = #define REG_NOMATCH 1 |
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| 66 | = #define REG_BADPAT 2 |
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| 67 | = #define REG_ECOLLATE 3 |
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| 68 | = #define REG_ECTYPE 4 |
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| 69 | = #define REG_EESCAPE 5 |
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| 70 | = #define REG_ESUBREG 6 |
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| 71 | = #define REG_EBRACK 7 |
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| 72 | = #define REG_EPAREN 8 |
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| 73 | = #define REG_EBRACE 9 |
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| 74 | = #define REG_BADBR 10 |
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| 75 | = #define REG_ERANGE 11 |
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| 76 | = #define REG_ESPACE 12 |
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| 77 | = #define REG_BADRPT 13 |
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| 78 | = #define REG_EMPTY 14 |
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| 79 | = #define REG_ASSERT 15 |
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| 80 | = #define REG_INVARG 16 |
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| 81 | = #define REG_ATOI 255 // convert name to number (!) |
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| 82 | = #define REG_ITOA 0400 // convert number to name (!) |
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| 83 | */ |
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| 84 | static struct rerr { |
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| 85 | int code; |
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| 86 | char *name; |
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| 87 | char *explain; |
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| 88 | } rerrs[] = { |
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| 89 | {REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match"}, |
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| 90 | {REG_BADPAT, "REG_BADPAT", "invalid regular expression"}, |
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| 91 | {REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element"}, |
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| 92 | {REG_ECTYPE, "REG_ECTYPE", "invalid character class"}, |
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| 93 | {REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)"}, |
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| 94 | {REG_ESUBREG, "REG_ESUBREG", "invalid backreference number"}, |
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| 95 | {REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced"}, |
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| 96 | {REG_EPAREN, "REG_EPAREN", "parentheses not balanced"}, |
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| 97 | {REG_EBRACE, "REG_EBRACE", "braces not balanced"}, |
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| 98 | {REG_BADBR, "REG_BADBR", "invalid repetition count(s)"}, |
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| 99 | {REG_ERANGE, "REG_ERANGE", "invalid character range"}, |
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| 100 | {REG_ESPACE, "REG_ESPACE", "out of memory"}, |
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| 101 | {REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid"}, |
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| 102 | {REG_EMPTY, "REG_EMPTY", "empty (sub)expression"}, |
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| 103 | {REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug"}, |
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| 104 | {REG_INVARG, "REG_INVARG", "invalid argument to regex routine"}, |
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| 105 | {0, "", "*** unknown regexp error code ***"} |
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| 106 | }; |
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| 107 | |
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| 108 | /* |
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| 109 | - regerror - the interface to error numbers |
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| 110 | = extern size_t regerror(int, const regex_t *__restrict, |
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| 111 | = char *__restrict, size_t); |
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| 112 | */ |
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| 113 | /* ARGSUSED */ |
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| 114 | size_t |
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| 115 | regerror(errcode, preg, errbuf, errbuf_size) |
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| 116 | int errcode; |
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| 117 | const regex_t *__restrict preg; |
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| 118 | char *__restrict errbuf; |
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| 119 | size_t errbuf_size; |
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| 120 | { |
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| 121 | struct rerr *r; |
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| 122 | size_t len; |
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| 123 | int target = errcode &~ REG_ITOA; |
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| 124 | char *s; |
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| 125 | char convbuf[50]; |
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| 126 | |
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| 127 | if (errcode == REG_ATOI) |
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| 128 | s = regatoi(preg, convbuf); |
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| 129 | else { |
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| 130 | for (r = rerrs; r->code != 0; r++) |
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| 131 | if (r->code == target) |
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| 132 | break; |
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| 133 | |
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| 134 | if (errcode®_ITOA) { |
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| 135 | if (r->code != 0) |
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| 136 | (void) strcpy(convbuf, r->name); |
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| 137 | else |
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| 138 | sprintf(convbuf, "REG_0x%x", target); |
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| 139 | assert(strlen(convbuf) < sizeof(convbuf)); |
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| 140 | s = convbuf; |
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| 141 | } else |
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| 142 | s = r->explain; |
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| 143 | } |
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| 144 | |
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| 145 | len = strlen(s) + 1; |
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| 146 | if (errbuf_size > 0) { |
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| 147 | if (errbuf_size > len) |
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| 148 | (void) strcpy(errbuf, s); |
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| 149 | else { |
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| 150 | (void) strncpy(errbuf, s, errbuf_size-1); |
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| 151 | errbuf[errbuf_size-1] = '\0'; |
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| 152 | } |
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| 153 | } |
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| 154 | |
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| 155 | return(len); |
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| 156 | } |
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| 157 | |
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| 158 | /* |
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| 159 | - regatoi - internal routine to implement REG_ATOI |
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| 160 | == static char *regatoi(const regex_t *preg, char *localbuf); |
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| 161 | */ |
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| 162 | static char * |
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| 163 | regatoi(preg, localbuf) |
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| 164 | const regex_t *preg; |
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| 165 | char *localbuf; |
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| 166 | { |
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| 167 | struct rerr *r; |
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| 168 | |
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| 169 | for (r = rerrs; r->code != 0; r++) |
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| 170 | if (strcmp(r->name, preg->re_endp) == 0) |
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| 171 | break; |
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| 172 | if (r->code == 0) |
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| 173 | return("0"); |
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| 174 | |
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| 175 | sprintf(localbuf, "%d", r->code); |
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| 176 | return(localbuf); |
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| 177 | } |
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| 178 | #endif /* !_NO_REGEX */ |
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