xref: /PHP-7.3/ext/mbstring/oniguruma/src/regposerr.c (revision 1979c5d1)
1 /**********************************************************************
2   regposerr.c - Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5  * Copyright (c) 2002-2019  K.Kosako
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 /* Can't include regint.h etc.. for conflict of regex_t.
31    Define ONIGURUMA_EXPORT here for onigposix.h.
32  */
33 #ifndef ONIGURUMA_EXPORT
34 #define ONIGURUMA_EXPORT
35 #endif
36 
37 #include "config.h"
38 #include "onigposix.h"
39 
40 #include <string.h>
41 
42 #if defined(__GNUC__)
43 #  define ARG_UNUSED  __attribute__ ((unused))
44 #else
45 #  define ARG_UNUSED
46 #endif
47 
48 #if defined(_WIN32) && !defined(__GNUC__)
49 #define xsnprintf   sprintf_s
50 #define xstrncpy(dest,src,size)   strncpy_s(dest,size,src,_TRUNCATE)
51 #else
52 #define xsnprintf   snprintf
53 #define xstrncpy    strncpy
54 #endif
55 
56 static char* ESTRING[] = {
57   NULL,
58   "failed to match",                         /* REG_NOMATCH    */
59   "Invalid regular expression",              /* REG_BADPAT     */
60   "invalid collating element referenced",    /* REG_ECOLLATE   */
61   "invalid character class type referenced", /* REG_ECTYPE     */
62   "bad backslash-escape sequence",           /* REG_EESCAPE    */
63   "invalid back reference number",           /* REG_ESUBREG    */
64   "imbalanced [ and ]",                      /* REG_EBRACK     */
65   "imbalanced ( and )",                      /* REG_EPAREN     */
66   "imbalanced { and }",                      /* REG_EBRACE     */
67   "invalid repeat range {n,m}",              /* REG_BADBR      */
68   "invalid range",                           /* REG_ERANGE     */
69   "Out of memory",                           /* REG_ESPACE     */
70   "? * + not preceded by valid regular expression", /* REG_BADRPT   */
71 
72   /* Extended errors */
73   "internal error",                          /* REG_EONIG_INTERNAL */
74   "invalid wide char value",                 /* REG_EONIG_BADWC    */
75   "invalid argument"                         /* REG_EONIG_BADARG   */
76 };
77 
78 #include <stdio.h>
79 
80 
81 extern size_t
regerror(int posix_ecode,const regex_t * reg ARG_UNUSED,char * buf,size_t size)82 regerror(int posix_ecode, const regex_t* reg ARG_UNUSED, char* buf,
83          size_t size)
84 {
85   char* s;
86   char tbuf[35];
87   size_t len;
88 
89   if (posix_ecode > 0
90       && posix_ecode < (int )(sizeof(ESTRING) / sizeof(ESTRING[0]))) {
91     s = ESTRING[posix_ecode];
92   }
93   else if (posix_ecode == 0) {
94     s = "";
95   }
96   else {
97     xsnprintf(tbuf, sizeof(tbuf), "undefined error code (%d)", posix_ecode);
98     s = tbuf;
99   }
100 
101   len = strlen(s) + 1; /* use strlen() because s is ascii encoding. */
102 
103   if (buf != NULL && size > 0) {
104     xstrncpy(buf, s, size - 1);
105     buf[size - 1] = '\0';
106   }
107   return len;
108 }
109