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
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
|
/** @file
Implementation of translation upon VT-UTF8.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "Terminal.h"
/**
Translate all VT-UTF8 characters in the Raw FIFI into unicode characters,
and insert them into Unicode FIFO.
@param TerminalDevice The terminal device.
**/
VOID
VTUTF8RawDataToUnicode (
IN TERMINAL_DEV *TerminalDevice
)
{
UTF8_CHAR Utf8Char;
UINT8 ValidBytes;
UINT16 UnicodeChar;
ValidBytes = 0;
//
// pop the raw data out from the raw fifo,
// and translate it into unicode, then push
// the unicode into unicode fifo, until the raw fifo is empty.
//
while (!IsRawFiFoEmpty (TerminalDevice) && !IsUnicodeFiFoFull (TerminalDevice)) {
GetOneValidUtf8Char (TerminalDevice, &Utf8Char, &ValidBytes);
if (ValidBytes < 1 || ValidBytes > 3) {
continue;
}
Utf8ToUnicode (Utf8Char, ValidBytes, (CHAR16 *) &UnicodeChar);
UnicodeFiFoInsertOneKey (TerminalDevice, UnicodeChar);
}
}
/**
Get one valid VT-UTF8 characters set from Raw Data FIFO.
@param Utf8Device The terminal device.
@param Utf8Char Returned valid VT-UTF8 characters set.
@param ValidBytes The count of returned VT-VTF8 characters.
If ValidBytes is zero, no valid VT-UTF8 returned.
**/
VOID
GetOneValidUtf8Char (
IN TERMINAL_DEV *Utf8Device,
OUT UTF8_CHAR *Utf8Char,
OUT UINT8 *ValidBytes
)
{
UINT8 Temp;
UINT8 Index;
BOOLEAN FetchFlag;
Temp = 0;
Index = 0;
FetchFlag = TRUE;
//
// if no valid Utf8 char is found in the RawFiFo,
// then *ValidBytes will be zero.
//
*ValidBytes = 0;
while (!IsRawFiFoEmpty (Utf8Device)) {
RawFiFoRemoveOneKey (Utf8Device, &Temp);
switch (*ValidBytes) {
case 0:
if ((Temp & 0x80) == 0) {
//
// one-byte utf8 char
//
*ValidBytes = 1;
Utf8Char->Utf8_1 = Temp;
FetchFlag = FALSE;
} else if ((Temp & 0xe0) == 0xc0) {
//
// two-byte utf8 char
//
*ValidBytes = 2;
Utf8Char->Utf8_2[1] = Temp;
} else if ((Temp & 0xf0) == 0xe0) {
//
// three-byte utf8 char
//
*ValidBytes = 3;
Utf8Char->Utf8_3[2] = Temp;
Index++;
} else {
//
// reset *ValidBytes to zero, let valid utf8 char search restart
//
*ValidBytes = 0;
}
break;
case 2:
//
// two-byte utf8 char go on
//
if ((Temp & 0xc0) == 0x80) {
Utf8Char->Utf8_2[0] = Temp;
FetchFlag = FALSE;
} else {
*ValidBytes = 0;
}
break;
case 3:
//
// three-byte utf8 char go on
//
if ((Temp & 0xc0) == 0x80) {
if (Index == 1) {
Utf8Char->Utf8_3[1] = Temp;
Index++;
} else {
Utf8Char->Utf8_3[0] = Temp;
FetchFlag = FALSE;
}
} else {
//
// reset *ValidBytes and Index to zero, let valid utf8 char search restart
//
*ValidBytes = 0;
Index = 0;
}
break;
default:
break;
}
if (!FetchFlag) {
break;
}
}
return ;
}
/**
Translate VT-UTF8 characters into one Unicode character.
UTF8 Encoding Table
Bits per Character | Unicode Character Range | Unicode Binary Encoding | UTF8 Binary Encoding
0-7 | 0x0000 - 0x007F | 00000000 0xxxxxxx | 0xxxxxxx
8-11 | 0x0080 - 0x07FF | 00000xxx xxxxxxxx | 110xxxxx 10xxxxxx
12-16 | 0x0800 - 0xFFFF | xxxxxxxx xxxxxxxx | 1110xxxx 10xxxxxx 10xxxxxx
@param Utf8Char VT-UTF8 character set needs translating.
@param ValidBytes The count of valid VT-UTF8 characters.
@param UnicodeChar Returned unicode character.
**/
VOID
Utf8ToUnicode (
IN UTF8_CHAR Utf8Char,
IN UINT8 ValidBytes,
OUT CHAR16 *UnicodeChar
)
{
UINT8 UnicodeByte0;
UINT8 UnicodeByte1;
UINT8 Byte0;
UINT8 Byte1;
UINT8 Byte2;
*UnicodeChar = 0;
//
// translate utf8 code to unicode, in terminal standard,
// up to 3 bytes utf8 code is supported.
//
switch (ValidBytes) {
case 1:
//
// one-byte utf8 code
//
*UnicodeChar = (UINT16) Utf8Char.Utf8_1;
break;
case 2:
//
// two-byte utf8 code
//
Byte0 = Utf8Char.Utf8_2[0];
Byte1 = Utf8Char.Utf8_2[1];
UnicodeByte0 = (UINT8) ((Byte1 << 6) | (Byte0 & 0x3f));
UnicodeByte1 = (UINT8) ((Byte1 >> 2) & 0x07);
*UnicodeChar = (UINT16) (UnicodeByte0 | (UnicodeByte1 << 8));
break;
case 3:
//
// three-byte utf8 code
//
Byte0 = Utf8Char.Utf8_3[0];
Byte1 = Utf8Char.Utf8_3[1];
Byte2 = Utf8Char.Utf8_3[2];
UnicodeByte0 = (UINT8) ((Byte1 << 6) | (Byte0 & 0x3f));
UnicodeByte1 = (UINT8) ((Byte2 << 4) | ((Byte1 >> 2) & 0x0f));
*UnicodeChar = (UINT16) (UnicodeByte0 | (UnicodeByte1 << 8));
default:
break;
}
return ;
}
/**
Translate one Unicode character into VT-UTF8 characters.
UTF8 Encoding Table
Bits per Character | Unicode Character Range | Unicode Binary Encoding | UTF8 Binary Encoding
0-7 | 0x0000 - 0x007F | 00000000 0xxxxxxx | 0xxxxxxx
8-11 | 0x0080 - 0x07FF | 00000xxx xxxxxxxx | 110xxxxx 10xxxxxx
12-16 | 0x0800 - 0xFFFF | xxxxxxxx xxxxxxxx | 1110xxxx 10xxxxxx 10xxxxxx
@param Unicode Unicode character need translating.
@param Utf8Char Return VT-UTF8 character set.
@param ValidBytes The count of valid VT-UTF8 characters. If
ValidBytes is zero, no valid VT-UTF8 returned.
**/
VOID
UnicodeToUtf8 (
IN CHAR16 Unicode,
OUT UTF8_CHAR *Utf8Char,
OUT UINT8 *ValidBytes
)
{
UINT8 UnicodeByte0;
UINT8 UnicodeByte1;
//
// translate unicode to utf8 code
//
UnicodeByte0 = (UINT8) Unicode;
UnicodeByte1 = (UINT8) (Unicode >> 8);
if (Unicode < 0x0080) {
Utf8Char->Utf8_1 = (UINT8) (UnicodeByte0 & 0x7f);
*ValidBytes = 1;
} else if (Unicode < 0x0800) {
//
// byte sequence: high -> low
// Utf8_2[0], Utf8_2[1]
//
Utf8Char->Utf8_2[1] = (UINT8) ((UnicodeByte0 & 0x3f) + 0x80);
Utf8Char->Utf8_2[0] = (UINT8) ((((UnicodeByte1 << 2) + (UnicodeByte0 >> 6)) & 0x1f) + 0xc0);
*ValidBytes = 2;
} else {
//
// byte sequence: high -> low
// Utf8_3[0], Utf8_3[1], Utf8_3[2]
//
Utf8Char->Utf8_3[2] = (UINT8) ((UnicodeByte0 & 0x3f) + 0x80);
Utf8Char->Utf8_3[1] = (UINT8) ((((UnicodeByte1 << 2) + (UnicodeByte0 >> 6)) & 0x3f) + 0x80);
Utf8Char->Utf8_3[0] = (UINT8) (((UnicodeByte1 >> 4) & 0x0f) + 0xe0);
*ValidBytes = 3;
}
}
/**
Check if input string is valid VT-UTF8 string.
@param TerminalDevice The terminal device.
@param WString The input string.
@retval EFI_SUCCESS If all input characters are valid.
**/
EFI_STATUS
VTUTF8TestString (
IN TERMINAL_DEV *TerminalDevice,
IN CHAR16 *WString
)
{
//
// to utf8, all kind of characters are supported.
//
return EFI_SUCCESS;
}
|
