1 /**********************************************************************
2 utf32_le.c - Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5 * Copyright (c) 2002-2016 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
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 if (end - p < 4) return 0;
71 return (OnigCodePoint )(((p[3] * 256 + p[2]) * 256 + p[1]) * 256 + p[0]);
72 }
73
74 static int
utf32le_code_to_mbclen(OnigCodePoint code ARG_UNUSED)75 utf32le_code_to_mbclen(OnigCodePoint code ARG_UNUSED)
76 {
77 return 4;
78 }
79
80 static int
utf32le_code_to_mbc(OnigCodePoint code,UChar * buf)81 utf32le_code_to_mbc(OnigCodePoint code, UChar *buf)
82 {
83 UChar* p = buf;
84
85 *p++ = (UChar ) (code & 0xff);
86 *p++ = (UChar )((code & 0xff00) >> 8);
87 *p++ = (UChar )((code & 0xff0000) >>16);
88 *p++ = (UChar )((code & 0xff000000) >>24);
89 return 4;
90 }
91
92 static int
utf32le_mbc_case_fold(OnigCaseFoldType flag,const UChar ** pp,const UChar * end,UChar * fold)93 utf32le_mbc_case_fold(OnigCaseFoldType flag,
94 const UChar** pp, const UChar* end, UChar* fold)
95 {
96 const UChar* p = *pp;
97
98 if (ONIGENC_IS_ASCII_CODE(*p) && *(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0) {
99 #ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
100 if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
101 if (*p == 0x49) {
102 *fold++ = 0x31;
103 *fold++ = 0x01;
104 }
105 }
106 else {
107 #endif
108 *fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
109 *fold++ = 0;
110 #ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
111 }
112 #endif
113
114 *fold++ = 0;
115 *fold = 0;
116 *pp += 4;
117 return 4;
118 }
119 else
120 return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF32_LE, flag, pp, end,
121 fold);
122 }
123
124 #if 0
125 static int
126 utf32le_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
127 {
128 const UChar* p = *pp;
129
130 (*pp) += 4;
131
132 if (*(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0) {
133 int c, v;
134
135 if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
136 return TRUE;
137 }
138
139 c = *p;
140 v = ONIGENC_IS_UNICODE_ISO_8859_1_BIT_CTYPE(c,
141 (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
142 if ((v | BIT_CTYPE_LOWER) != 0) {
143 /* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
144 if (c >= 0xaa && c <= 0xba)
145 return FALSE;
146 else
147 return TRUE;
148 }
149 return (v != 0 ? TRUE : FALSE);
150 }
151
152 return FALSE;
153 }
154 #endif
155
156 static UChar*
utf32le_left_adjust_char_head(const UChar * start,const UChar * s)157 utf32le_left_adjust_char_head(const UChar* start, const UChar* s)
158 {
159 int rem;
160
161 if (s <= start) return (UChar* )s;
162
163 rem = (s - start) % 4;
164 return (UChar* )(s - rem);
165 }
166
167 static int
utf32le_get_case_fold_codes_by_str(OnigCaseFoldType flag,const OnigUChar * p,const OnigUChar * end,OnigCaseFoldCodeItem items[])168 utf32le_get_case_fold_codes_by_str(OnigCaseFoldType flag,
169 const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
170 {
171 return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF32_LE,
172 flag, p, end, items);
173 }
174
175 OnigEncodingType OnigEncodingUTF32_LE = {
176 utf32le_mbc_enc_len,
177 "UTF-32LE", /* name */
178 4, /* max byte length */
179 4, /* min byte length */
180 utf32le_is_mbc_newline,
181 utf32le_mbc_to_code,
182 utf32le_code_to_mbclen,
183 utf32le_code_to_mbc,
184 utf32le_mbc_case_fold,
185 onigenc_unicode_apply_all_case_fold,
186 utf32le_get_case_fold_codes_by_str,
187 onigenc_unicode_property_name_to_ctype,
188 onigenc_unicode_is_code_ctype,
189 onigenc_utf16_32_get_ctype_code_range,
190 utf32le_left_adjust_char_head,
191 onigenc_always_false_is_allowed_reverse_match,
192 NULL, /* init */
193 NULL, /* is_initialized */
194 is_valid_mbc_string
195 };
196
