forked from SerenityOS/serenity
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Decoder.cpp
274 lines (249 loc) · 11.5 KB
/
Decoder.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
/*
* Copyright (c) 2020, Andreas Kling <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <LibTextCodec/Decoder.h>
namespace TextCodec {
namespace {
Latin1Decoder& latin1_decoder()
{
static Latin1Decoder* decoder;
if (!decoder)
decoder = new Latin1Decoder;
return *decoder;
}
UTF8Decoder& utf8_decoder()
{
static UTF8Decoder* decoder;
if (!decoder)
decoder = new UTF8Decoder;
return *decoder;
}
Latin2Decoder& latin2_decoder()
{
static Latin2Decoder* decoder = nullptr;
if (!decoder)
decoder = new Latin2Decoder;
return *decoder;
}
}
Decoder* decoder_for(const String& a_encoding)
{
auto encoding = get_standardized_encoding(a_encoding);
if (encoding.equals_ignoring_case("windows-1252"))
return &latin1_decoder();
if (encoding.equals_ignoring_case("utf-8"))
return &utf8_decoder();
if (encoding.equals_ignoring_case("iso-8859-2"))
return &latin2_decoder();
dbgln("TextCodec: No decoder implemented for encoding '{}'", a_encoding);
return nullptr;
}
// https://encoding.spec.whatwg.org/#concept-encoding-get
String get_standardized_encoding(const String& encoding)
{
String trimmed_lowercase_encoding = encoding.trim_whitespace().to_lowercase();
if (trimmed_lowercase_encoding.is_one_of("unicode-1-1-utf-8", "unicode11utf8", "unicode20utf8", "utf-8", "utf8", "x-unicode20utf8"))
return "UTF-8";
if (trimmed_lowercase_encoding.is_one_of("866", "cp866", "csibm866", "ibm666"))
return "IBM666";
if (trimmed_lowercase_encoding.is_one_of("csisolatin2", "iso-8859-2", "iso-ir-101", "iso8859-2", "iso88592", "iso_8859-2", "iso_8859-2:1987", "l2", "latin2"))
return "ISO-8859-2";
if (trimmed_lowercase_encoding.is_one_of("csisolatin3", "iso-8859-3", "iso-ir-109", "iso8859-3", "iso88593", "iso_8859-3", "iso_8859-3:1988", "l3", "latin3"))
return "ISO-8859-3";
if (trimmed_lowercase_encoding.is_one_of("csisolatin4", "iso-8859-4", "iso-ir-110", "iso8859-4", "iso88594", "iso_8859-4", "iso_8859-4:1989", "l4", "latin4"))
return "ISO-8859-4";
if (trimmed_lowercase_encoding.is_one_of("csisolatincyrillic", "cyrillic", "iso-8859-5", "iso-ir-144", "iso8859-5", "iso88595", "iso_8859-5", "iso_8859-5:1988"))
return "ISO-8859-5";
if (trimmed_lowercase_encoding.is_one_of("arabic", "asmo-708", "csiso88596e", "csiso88596i", "csisolatinarabic", "ecma-114", "iso-8859-6", "iso-8859-6-e", "iso-8859-6-i", "iso-ir-127", "iso8859-6", "iso88596", "iso_8859-6", "iso_8859-6:1987"))
return "ISO-8859-6";
if (trimmed_lowercase_encoding.is_one_of("csisolatingreek", "ecma-118", "elot_928", "greek", "greek8", "iso-8859-7", "iso-ir-126", "iso8859-7", "iso88597", "iso_8859-7", "iso_8859-7:1987", "sun_eu_greek"))
return "ISO-8859-7";
if (trimmed_lowercase_encoding.is_one_of("csiso88598e", "csisolatinhebrew", "hebrew", "iso-8859-8", "iso-8859-8-e", "iso-ir-138", "iso8859-8", "iso88598", "iso_8859-8", "iso_8859-8:1988", "visual"))
return "ISO-8859-8";
if (trimmed_lowercase_encoding.is_one_of("csiso88598i", "iso-8859-8-i", "logical"))
return "ISO-8859-8-I";
if (trimmed_lowercase_encoding.is_one_of("csisolatin6", "iso8859-10", "iso-ir-157", "iso8859-10", "iso885910", "l6", "latin6"))
return "ISO-8859-10";
if (trimmed_lowercase_encoding.is_one_of("iso-8859-13", "iso8859-13", "iso885913"))
return "ISO-8859-13";
if (trimmed_lowercase_encoding.is_one_of("iso-8859-14", "iso8859-14", "iso885914"))
return "ISO-8859-14";
if (trimmed_lowercase_encoding.is_one_of("csisolatin9", "iso-8859-15", "iso8859-15", "iso885915", "iso_8859-15", "l9"))
return "ISO-8859-15";
if (trimmed_lowercase_encoding == "iso-8859-16")
return "ISO-8859-16";
if (trimmed_lowercase_encoding.is_one_of("cskoi8r", "koi", "koi8", "koi8-r", "koi8_r"))
return "KOI8-R";
if (trimmed_lowercase_encoding.is_one_of("koi8-ru", "koi8-u"))
return "KOI8-U";
if (trimmed_lowercase_encoding.is_one_of("csmacintosh", "mac", "macintosh", "x-mac-roman"))
return "macintosh";
if (trimmed_lowercase_encoding.is_one_of("dos-874", "iso-8859-11", "iso8859-11", "iso885911", "tis-620", "windows-874"))
return "windows-874";
if (trimmed_lowercase_encoding.is_one_of("cp1250", "windows-1250", "x-cp1250"))
return "windows-1250";
if (trimmed_lowercase_encoding.is_one_of("cp1251", "windows-1251", "x-cp1251"))
return "windows-1251";
if (trimmed_lowercase_encoding.is_one_of("ansi_x3.4-1968", "ascii", "cp1252", "cp819", "csisolatin1", "ibm819", "iso-8859-1", "iso-ir-100", "iso8859-1", "iso88591", "iso_8859-1", "iso_8859-1:1987", "l1", "latin1", "us-ascii", "windows-1252", "x-cp1252"))
return "windows-1252";
if (trimmed_lowercase_encoding.is_one_of("cp1253", "windows-1253", "x-cp1253"))
return "windows-1253";
if (trimmed_lowercase_encoding.is_one_of("cp1254", "csisolatin5", "iso-8859-9", "iso-ir-148", "iso-8859-9", "iso-88599", "iso_8859-9", "iso_8859-9:1989", "l5", "latin5", "windows-1254", "x-cp1254"))
return "windows-1254";
if (trimmed_lowercase_encoding.is_one_of("cp1255", "windows-1255", "x-cp1255"))
return "windows-1255";
if (trimmed_lowercase_encoding.is_one_of("cp1256", "windows-1256", "x-cp1256"))
return "windows-1256";
if (trimmed_lowercase_encoding.is_one_of("cp1257", "windows-1257", "x-cp1257"))
return "windows-1257";
if (trimmed_lowercase_encoding.is_one_of("cp1258", "windows-1258", "x-cp1258"))
return "windows-1258";
if (trimmed_lowercase_encoding.is_one_of("x-mac-cyrillic", "x-mac-ukrainian"))
return "x-mac-cyrillic";
if (trimmed_lowercase_encoding.is_one_of("chinese", "csgb2312", "csiso58gb231280", "gb2312", "gb_2312", "gb_2312-80", "gbk", "iso-ir-58", "x-gbk"))
return "GBK";
if (trimmed_lowercase_encoding == "gb18030")
return "gb18030";
if (trimmed_lowercase_encoding.is_one_of("big5", "big5-hkscs", "cn-big5", "csbig5", "x-x-big5"))
return "Big5";
if (trimmed_lowercase_encoding.is_one_of("cseucpkdfmtjapanese", "euc-jp", "x-euc-jp"))
return "EUC-JP";
if (trimmed_lowercase_encoding.is_one_of("csiso2022jp", "iso-2022-jp"))
return "ISO-2022-JP";
if (trimmed_lowercase_encoding.is_one_of("csshiftjis", "ms932", "ms_kanji", "shift-jis", "shift_jis", "sjis", "windows-31j", "x-sjis"))
return "Shift_JIS";
if (trimmed_lowercase_encoding.is_one_of("cseuckr", "csksc56011987", "euc-kr", "iso-ir-149", "korean", "ks_c_5601-1987", "ks_c_5601-1989", "ksc5601", "ksc_5601", "windows-949"))
return "EUC-KR";
if (trimmed_lowercase_encoding.is_one_of("csiso2022kr", "hz-gb-2312", "iso-2022-cn", "iso-2022-cn-ext", "iso-2022-kr", "replacement"))
return "replacement";
if (trimmed_lowercase_encoding.is_one_of("unicodefffe", "utf-16be"))
return "UTF-16BE";
if (trimmed_lowercase_encoding.is_one_of("csunicode", "iso-10646-ucs-2", "ucs-2", "unicode", "unicodefeff", "utf-16", "utf-16le"))
return "UTF-16LE";
if (trimmed_lowercase_encoding == "x-user-defined")
return "x-user-defined";
dbg() << "TextCodec: Unrecognized encoding: " << encoding;
return {};
}
bool is_standardized_encoding(const String& encoding)
{
auto lowercase_encoding = encoding.to_lowercase();
return lowercase_encoding.is_one_of("utf-8", "ibm666", "iso-8859-2", "iso-8859-3", "iso-8859-4", "iso-8859-5", "iso-8859-6", "iso-8859-7", "iso-8859-8", "iso-8859-8-I", "iso-8859-10", "iso-8859-13", "iso-8859-14", "iso-8859-15", "iso-8859-16", "koi8-r", "koi8-u", "macintosh", "windows-874", "windows-1250", "windows-1251", "windows-1252", "windows-1253", "windows-1254", "windows-1255", "windows-1256", "windows-1257", "windows-1258", "x-mac-cyrillic", "gbk", "gb18030", "big5", "euc-jp", "iso-2022-JP", "shift_jis", "euc-kr", "replacement", "utf-16be", "utf-16le", "x-user-defined");
}
String UTF8Decoder::to_utf8(const StringView& input)
{
return input;
}
String Latin1Decoder::to_utf8(const StringView& input)
{
StringBuilder builder(input.length());
for (size_t i = 0; i < input.length(); ++i) {
u8 ch = input[i];
// Latin1 is the same as the first 256 Unicode code_points, so no mapping is needed, just utf-8 encoding.
builder.append_code_point(ch);
}
return builder.to_string();
}
namespace {
u32 convert_latin2_to_utf8(u8 in)
{
switch (in) {
#define MAP(X, Y) \
case X: \
return Y
MAP(0xA1, 0x104);
MAP(0xA2, 0x2D8);
MAP(0xA3, 0x141);
MAP(0xA5, 0x13D);
MAP(0xA6, 0x15A);
MAP(0xA9, 0x160);
MAP(0xAA, 0x15E);
MAP(0xAB, 0x164);
MAP(0xAC, 0x179);
MAP(0xAE, 0x17D);
MAP(0xAF, 0x17B);
MAP(0xB1, 0x105);
MAP(0xB2, 0x2DB);
MAP(0xB3, 0x142);
MAP(0xB5, 0x13E);
MAP(0xB6, 0x15B);
MAP(0xB7, 0x2C7);
MAP(0xB9, 0x161);
MAP(0xBA, 0x15F);
MAP(0xBB, 0x165);
MAP(0xBC, 0x17A);
MAP(0xBD, 0x2DD);
MAP(0xBE, 0x17E);
MAP(0xBF, 0x17C);
MAP(0xC0, 0x154);
MAP(0xC3, 0x102);
MAP(0xC5, 0x139);
MAP(0xC6, 0x106);
MAP(0xC8, 0x10C);
MAP(0xCA, 0x118);
MAP(0xCC, 0x11A);
MAP(0xCF, 0x10E);
MAP(0xD0, 0x110);
MAP(0xD1, 0x143);
MAP(0xD2, 0x147);
MAP(0xD5, 0x150);
MAP(0xD8, 0x158);
MAP(0xD9, 0x16E);
MAP(0xDB, 0x170);
MAP(0xDE, 0x162);
MAP(0xE0, 0x155);
MAP(0xE3, 0x103);
MAP(0xE5, 0x13A);
MAP(0xE6, 0x107);
MAP(0xE8, 0x10D);
MAP(0xEA, 0x119);
MAP(0xEC, 0x11B);
MAP(0xEF, 0x10F);
MAP(0xF0, 0x111);
MAP(0xF1, 0x144);
MAP(0xF2, 0x148);
MAP(0xF5, 0x151);
MAP(0xF8, 0x159);
MAP(0xF9, 0x16F);
MAP(0xFB, 0x171);
MAP(0xFE, 0x163);
MAP(0xFF, 0x2D9);
#undef MAP
default:
return in;
}
}
}
String Latin2Decoder::to_utf8(const StringView& input)
{
StringBuilder builder(input.length());
for (auto c : input) {
builder.append_code_point(convert_latin2_to_utf8(c));
}
return builder.to_string();
}
}