1 /**********************************************************************
2 utf32_le.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 #include "regenc.h"
31
32 static int
utf32le_mbc_enc_len(const UChar * p ARG_UNUSED)33 utf32le_mbc_enc_len(const UChar* p ARG_UNUSED)
34 {
35 return 4;
36 }
37
38 static int
is_valid_mbc_string(const UChar * s,const UChar * end)39 is_valid_mbc_string(const UChar* s, const UChar* end)
40 {
41 return onigenc_length_check_is_valid_mbc_string(ONIG_ENCODING_UTF32_LE, s, end);
42 }
43
44 static int
utf32le_is_mbc_newline(const UChar * p,const UChar * end)45 utf32le_is_mbc_newline(const UChar* p, const UChar* end)
46 {
47 if (p + 3 < end) {
48 if (*p == 0x0a && *(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0)
49 return 1;
50 #ifdef USE_UNICODE_ALL_LINE_TERMINATORS
51 if ((
52 #ifndef USE_CRNL_AS_LINE_TERMINATOR
53 *p == 0x0d ||
54 #endif
55 *p == 0x85)
56 && *(p+1) == 0x00 && (p+2) == 0x00 && *(p+3) == 0x00)
57 return 1;
58
59 if (*(p+1) == 0x20 && (*p == 0x29 || *p == 0x28)
60 && *(p+2) == 0x00 && *(p+3) == 0x00)
61 return 1;
62 #endif
63 }
64 return 0;
65 }
66
67 static OnigCodePoint
utf32le_mbc_to_code(const UChar * p,const UChar * end ARG_UNUSED)68 utf32le_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED)
69 {
70 return (OnigCodePoint )(((p[3] * 256 + p[2]) * 256 + p[1]) * 256 + p[0]);
71 }
72
73 static int
utf32le_code_to_mbclen(OnigCodePoint code ARG_UNUSED)74 utf32le_code_to_mbclen(OnigCodePoint code ARG_UNUSED)
75 {
76 return 4;
77 }
78
79 static int
utf32le_code_to_mbc(OnigCodePoint code,UChar * buf)80 utf32le_code_to_mbc(OnigCodePoint code, UChar *buf)
81 {
82 UChar* p = buf;
83
84 *p++ = (UChar ) (code & 0xff);
85 *p++ = (UChar )((code & 0xff00) >> 8);
86 *p++ = (UChar )((code & 0xff0000) >>16);
87 *p++ = (UChar )((code & 0xff000000) >>24);
88 return 4;
89 }
90
91 static int
utf32le_mbc_case_fold(OnigCaseFoldType flag,const UChar ** pp,const UChar * end,UChar * fold)92 utf32le_mbc_case_fold(OnigCaseFoldType flag,
93 const UChar** pp, const UChar* end, UChar* fold)
94 {
95 const UChar* p = *pp;
96
97 if (ONIGENC_IS_ASCII_CODE(*p) && *(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0) {
98 #ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
99 if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
100 if (*p == 0x49) {
101 *fold++ = 0x31;
102 *fold++ = 0x01;
103 }
104 }
105 else {
106 #endif
107 *fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
108 *fold++ = 0;
109 #ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
110 }
111 #endif
112
113 *fold++ = 0;
114 *fold = 0;
115 *pp += 4;
116 return 4;
117 }
118 else
119 return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF32_LE, flag, pp, end,
120 fold);
121 }
122
123 static UChar*
utf32le_left_adjust_char_head(const UChar * start,const UChar * s)124 utf32le_left_adjust_char_head(const UChar* start, const UChar* s)
125 {
126 int rem;
127
128 if (s <= start) return (UChar* )s;
129
130 rem = (s - start) % 4;
131 return (UChar* )(s - rem);
132 }
133
134 static int
utf32le_get_case_fold_codes_by_str(OnigCaseFoldType flag,const OnigUChar * p,const OnigUChar * end,OnigCaseFoldCodeItem items[])135 utf32le_get_case_fold_codes_by_str(OnigCaseFoldType flag,
136 const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
137 {
138 return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF32_LE,
139 flag, p, end, items);
140 }
141
142 OnigEncodingType OnigEncodingUTF32_LE = {
143 utf32le_mbc_enc_len,
144 "UTF-32LE", /* name */
145 4, /* max enc length */
146 4, /* min enc length */
147 utf32le_is_mbc_newline,
148 utf32le_mbc_to_code,
149 utf32le_code_to_mbclen,
150 utf32le_code_to_mbc,
151 utf32le_mbc_case_fold,
152 onigenc_unicode_apply_all_case_fold,
153 utf32le_get_case_fold_codes_by_str,
154 onigenc_unicode_property_name_to_ctype,
155 onigenc_unicode_is_code_ctype,
156 onigenc_utf16_32_get_ctype_code_range,
157 utf32le_left_adjust_char_head,
158 onigenc_always_false_is_allowed_reverse_match,
159 NULL, /* init */
160 NULL, /* is_initialized */
161 is_valid_mbc_string,
162 ENC_FLAG_UNICODE|ENC_FLAG_SKIP_OFFSET_1,
163 0, 0
164 };
165
