1 /**********************************************************************
2 utf32_be.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
utf32be_mbc_enc_len(const UChar * p ARG_UNUSED)33 utf32be_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_BE, s, end);
42 }
43
44 static int
utf32be_is_mbc_newline(const UChar * p,const UChar * end)45 utf32be_is_mbc_newline(const UChar* p, const UChar* end)
46 {
47 if (p + 3 < end) {
48 if (*(p+3) == 0x0a && *(p+2) == 0 && *(p+1) == 0 && *p == 0)
49 return 1;
50 #ifdef USE_UNICODE_ALL_LINE_TERMINATORS
51 if ((
52 #ifndef USE_CRNL_AS_LINE_TERMINATOR
53 *(p+3) == 0x0d ||
54 #endif
55 *(p+3) == 0x85)
56 && *(p+2) == 0 && *(p+1) == 0 && *p == 0x00)
57 return 1;
58
59 if (*(p+2) == 0x20 && (*(p+3) == 0x29 || *(p+3) == 0x28)
60 && *(p+1) == 0 && *p == 0)
61 return 1;
62 #endif
63 }
64 return 0;
65 }
66
67 static OnigCodePoint
utf32be_mbc_to_code(const UChar * p,const UChar * end ARG_UNUSED)68 utf32be_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED)
69 {
70 return (OnigCodePoint )(((p[0] * 256 + p[1]) * 256 + p[2]) * 256 + p[3]);
71 }
72
73 static int
utf32be_code_to_mbclen(OnigCodePoint code ARG_UNUSED)74 utf32be_code_to_mbclen(OnigCodePoint code ARG_UNUSED)
75 {
76 return 4;
77 }
78
79 static int
utf32be_code_to_mbc(OnigCodePoint code,UChar * buf)80 utf32be_code_to_mbc(OnigCodePoint code, UChar *buf)
81 {
82 UChar* p = buf;
83
84 *p++ = (UChar )((code & 0xff000000) >>24);
85 *p++ = (UChar )((code & 0xff0000) >>16);
86 *p++ = (UChar )((code & 0xff00) >> 8);
87 *p++ = (UChar ) (code & 0xff);
88 return 4;
89 }
90
91 static int
utf32be_mbc_case_fold(OnigCaseFoldType flag,const UChar ** pp,const UChar * end,UChar * fold)92 utf32be_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+3)) && *(p+2) == 0 && *(p+1) == 0 && *p == 0) {
98 *fold++ = 0;
99 *fold++ = 0;
100
101 #ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
102 if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
103 if (*(p+3) == 0x49) {
104 *fold++ = 0x01;
105 *fold = 0x31;
106 (*pp) += 4;
107 return 4;
108 }
109 }
110 #endif
111
112 *fold++ = 0;
113 *fold = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*(p+3));
114 *pp += 4;
115 return 4;
116 }
117 else
118 return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF32_BE, flag, pp, end,
119 fold);
120 }
121
122 static UChar*
utf32be_left_adjust_char_head(const UChar * start,const UChar * s)123 utf32be_left_adjust_char_head(const UChar* start, const UChar* s)
124 {
125 int rem;
126
127 if (s <= start) return (UChar* )s;
128
129 rem = (s - start) % 4;
130 return (UChar* )(s - rem);
131 }
132
133 static int
utf32be_get_case_fold_codes_by_str(OnigCaseFoldType flag,const OnigUChar * p,const OnigUChar * end,OnigCaseFoldCodeItem items[])134 utf32be_get_case_fold_codes_by_str(OnigCaseFoldType flag,
135 const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
136 {
137 return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF32_BE,
138 flag, p, end, items);
139 }
140
141 OnigEncodingType OnigEncodingUTF32_BE = {
142 utf32be_mbc_enc_len,
143 "UTF-32BE", /* name */
144 4, /* max enc length */
145 4, /* min enc length */
146 utf32be_is_mbc_newline,
147 utf32be_mbc_to_code,
148 utf32be_code_to_mbclen,
149 utf32be_code_to_mbc,
150 utf32be_mbc_case_fold,
151 onigenc_unicode_apply_all_case_fold,
152 utf32be_get_case_fold_codes_by_str,
153 onigenc_unicode_property_name_to_ctype,
154 onigenc_unicode_is_code_ctype,
155 onigenc_utf16_32_get_ctype_code_range,
156 utf32be_left_adjust_char_head,
157 onigenc_always_false_is_allowed_reverse_match,
158 NULL, /* init */
159 NULL, /* is_initialized */
160 is_valid_mbc_string,
161 ENC_FLAG_UNICODE|ENC_FLAG_SKIP_OFFSET_4,
162 0, 0
163 };
164
