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95276127 | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | vtutf8.c\r | |
15 | \r | |
16 | Abstract: \r | |
17 | \r | |
18 | \r | |
19 | Revision History\r | |
20 | --*/\r | |
21 | \r | |
22 | \r | |
23 | //\r | |
24 | // Include common header file for this module.\r | |
25 | //\r | |
26 | #include "CommonHeader.h"\r | |
27 | \r | |
28 | #include "Terminal.h"\r | |
29 | \r | |
30 | VOID\r | |
31 | VTUTF8RawDataToUnicode (\r | |
32 | IN TERMINAL_DEV *TerminalDevice\r | |
33 | )\r | |
34 | {\r | |
35 | UTF8_CHAR Utf8Char;\r | |
36 | UINT8 ValidBytes;\r | |
37 | UINT16 UnicodeChar;\r | |
38 | \r | |
39 | ValidBytes = 0;\r | |
40 | //\r | |
41 | // pop the raw data out from the raw fifo,\r | |
42 | // and translate it into unicode, then push\r | |
43 | // the unicode into unicode fifo, until the raw fifo is empty.\r | |
44 | //\r | |
45 | while (!IsRawFiFoEmpty (TerminalDevice)) {\r | |
46 | \r | |
47 | GetOneValidUtf8Char (TerminalDevice, &Utf8Char, &ValidBytes);\r | |
48 | \r | |
49 | if (ValidBytes < 1 || ValidBytes > 3) {\r | |
50 | continue;\r | |
51 | }\r | |
52 | \r | |
53 | Utf8ToUnicode (Utf8Char, ValidBytes, (CHAR16 *) &UnicodeChar);\r | |
54 | \r | |
55 | UnicodeFiFoInsertOneKey (TerminalDevice, UnicodeChar);\r | |
56 | }\r | |
57 | }\r | |
58 | \r | |
59 | VOID\r | |
60 | GetOneValidUtf8Char (\r | |
61 | IN TERMINAL_DEV *Utf8Device,\r | |
62 | OUT UTF8_CHAR *Utf8Char,\r | |
63 | OUT UINT8 *ValidBytes\r | |
64 | )\r | |
65 | {\r | |
66 | UINT8 Temp;\r | |
67 | UINT8 Index;\r | |
68 | BOOLEAN FetchFlag;\r | |
69 | \r | |
70 | Temp = 0;\r | |
71 | Index = 0;\r | |
72 | FetchFlag = TRUE;\r | |
73 | \r | |
74 | //\r | |
75 | // if no valid Utf8 char is found in the RawFiFo,\r | |
76 | // then *ValidBytes will be zero.\r | |
77 | //\r | |
78 | *ValidBytes = 0;\r | |
79 | \r | |
80 | while (!IsRawFiFoEmpty (Utf8Device)) {\r | |
81 | \r | |
82 | RawFiFoRemoveOneKey (Utf8Device, &Temp);\r | |
83 | \r | |
84 | switch (*ValidBytes) {\r | |
85 | \r | |
86 | case 0:\r | |
87 | if ((Temp & 0x80) == 0) {\r | |
88 | //\r | |
89 | // one-byte utf8 char\r | |
90 | //\r | |
91 | *ValidBytes = 1;\r | |
92 | \r | |
93 | Utf8Char->Utf8_1 = Temp;\r | |
94 | \r | |
95 | FetchFlag = FALSE;\r | |
96 | \r | |
97 | } else if ((Temp & 0xe0) == 0xc0) {\r | |
98 | //\r | |
99 | // two-byte utf8 char\r | |
100 | //\r | |
101 | *ValidBytes = 2;\r | |
102 | \r | |
103 | Utf8Char->Utf8_2[1] = Temp;\r | |
104 | \r | |
105 | } else if ((Temp & 0xf0) == 0xe0) {\r | |
106 | //\r | |
107 | // three-byte utf8 char\r | |
108 | //\r | |
109 | *ValidBytes = 3;\r | |
110 | \r | |
111 | Utf8Char->Utf8_3[2] = Temp;\r | |
112 | \r | |
113 | Index++;\r | |
114 | \r | |
115 | } else {\r | |
116 | //\r | |
117 | // reset *ValidBytes to zero, let valid utf8 char search restart\r | |
118 | //\r | |
119 | *ValidBytes = 0;\r | |
120 | }\r | |
121 | \r | |
122 | break;\r | |
123 | \r | |
124 | case 2:\r | |
125 | if ((Temp & 0xc0) == 0x80) {\r | |
126 | \r | |
127 | Utf8Char->Utf8_2[0] = Temp;\r | |
128 | \r | |
129 | FetchFlag = FALSE;\r | |
130 | \r | |
131 | } else {\r | |
132 | \r | |
133 | *ValidBytes = 0;\r | |
134 | }\r | |
135 | break;\r | |
136 | \r | |
137 | case 3:\r | |
138 | if ((Temp & 0xc0) == 0x80) {\r | |
139 | \r | |
140 | Utf8Char->Utf8_3[2 - Index] = Temp;\r | |
141 | Index++;\r | |
142 | if (Index == 3) {\r | |
143 | FetchFlag = FALSE;\r | |
144 | }\r | |
145 | } else {\r | |
146 | \r | |
147 | *ValidBytes = 0;\r | |
148 | Index = 0;\r | |
149 | }\r | |
150 | break;\r | |
151 | \r | |
152 | default:\r | |
153 | break;\r | |
154 | }\r | |
155 | \r | |
156 | if (!FetchFlag) {\r | |
157 | break;\r | |
158 | }\r | |
159 | }\r | |
160 | \r | |
161 | return ;\r | |
162 | }\r | |
163 | \r | |
164 | VOID\r | |
165 | Utf8ToUnicode (\r | |
166 | IN UTF8_CHAR Utf8Char,\r | |
167 | IN UINT8 ValidBytes,\r | |
168 | OUT CHAR16 *UnicodeChar\r | |
169 | )\r | |
170 | {\r | |
171 | UINT8 UnicodeByte0;\r | |
172 | UINT8 UnicodeByte1;\r | |
173 | UINT8 Byte0;\r | |
174 | UINT8 Byte1;\r | |
175 | UINT8 Byte2;\r | |
176 | \r | |
177 | *UnicodeChar = 0;\r | |
178 | \r | |
179 | //\r | |
180 | // translate utf8 code to unicode, in terminal standard,\r | |
181 | // up to 3 bytes utf8 code is supported.\r | |
182 | //\r | |
183 | switch (ValidBytes) {\r | |
184 | case 1:\r | |
185 | //\r | |
186 | // one-byte utf8 code\r | |
187 | //\r | |
188 | *UnicodeChar = (UINT16) Utf8Char.Utf8_1;\r | |
189 | break;\r | |
190 | \r | |
191 | case 2:\r | |
192 | //\r | |
193 | // two-byte utf8 code\r | |
194 | //\r | |
195 | Byte0 = Utf8Char.Utf8_2[0];\r | |
196 | Byte1 = Utf8Char.Utf8_2[1];\r | |
197 | \r | |
198 | UnicodeByte0 = (UINT8) ((Byte1 << 6) | (Byte0 & 0x3f));\r | |
199 | UnicodeByte1 = (UINT8) ((Byte1 >> 2) & 0x07);\r | |
200 | *UnicodeChar = (UINT16) (UnicodeByte0 | (UnicodeByte1 << 8));\r | |
201 | break;\r | |
202 | \r | |
203 | case 3:\r | |
204 | //\r | |
205 | // three-byte utf8 code\r | |
206 | //\r | |
207 | Byte0 = Utf8Char.Utf8_3[0];\r | |
208 | Byte1 = Utf8Char.Utf8_3[1];\r | |
209 | Byte2 = Utf8Char.Utf8_3[2];\r | |
210 | \r | |
211 | UnicodeByte0 = (UINT8) ((Byte1 << 6) | (Byte0 & 0x3f));\r | |
212 | UnicodeByte1 = (UINT8) ((Byte2 << 4) | ((Byte1 >> 2) & 0x0f));\r | |
213 | *UnicodeChar = (UINT16) (UnicodeByte0 | (UnicodeByte1 << 8));\r | |
214 | \r | |
215 | default:\r | |
216 | break;\r | |
217 | }\r | |
218 | \r | |
219 | return ;\r | |
220 | }\r | |
221 | \r | |
222 | VOID\r | |
223 | UnicodeToUtf8 (\r | |
224 | IN CHAR16 Unicode,\r | |
225 | OUT UTF8_CHAR *Utf8Char,\r | |
226 | OUT UINT8 *ValidBytes\r | |
227 | )\r | |
228 | {\r | |
229 | UINT8 UnicodeByte0;\r | |
230 | UINT8 UnicodeByte1;\r | |
231 | //\r | |
232 | // translate unicode to utf8 code\r | |
233 | //\r | |
234 | UnicodeByte0 = (UINT8) Unicode;\r | |
235 | UnicodeByte1 = (UINT8) (Unicode >> 8);\r | |
236 | \r | |
237 | if (Unicode < 0x0080) {\r | |
238 | \r | |
239 | Utf8Char->Utf8_1 = (UINT8) (UnicodeByte0 & 0x7f);\r | |
240 | *ValidBytes = 1;\r | |
241 | \r | |
242 | } else if (Unicode < 0x0800) {\r | |
243 | //\r | |
244 | // byte sequence: high -> low\r | |
245 | // Utf8_2[0], Utf8_2[1]\r | |
246 | //\r | |
247 | Utf8Char->Utf8_2[1] = (UINT8) ((UnicodeByte0 & 0x3f) + 0x80);\r | |
248 | Utf8Char->Utf8_2[0] = (UINT8) ((((UnicodeByte1 << 2) + (UnicodeByte0 >> 6)) & 0x1f) + 0xc0);\r | |
249 | \r | |
250 | *ValidBytes = 2;\r | |
251 | \r | |
252 | } else {\r | |
253 | //\r | |
254 | // byte sequence: high -> low\r | |
255 | // Utf8_3[0], Utf8_3[1], Utf8_3[2]\r | |
256 | //\r | |
257 | Utf8Char->Utf8_3[2] = (UINT8) ((UnicodeByte0 & 0x3f) + 0x80);\r | |
258 | Utf8Char->Utf8_3[1] = (UINT8) ((((UnicodeByte1 << 2) + (UnicodeByte0 >> 6)) & 0x3f) + 0x80);\r | |
259 | Utf8Char->Utf8_3[0] = (UINT8) (((UnicodeByte1 >> 4) & 0x0f) + 0xe0);\r | |
260 | \r | |
261 | *ValidBytes = 3;\r | |
262 | }\r | |
263 | }\r | |
264 | \r | |
265 | EFI_STATUS\r | |
266 | VTUTF8TestString (\r | |
267 | IN TERMINAL_DEV *TerminalDevice,\r | |
268 | IN CHAR16 *WString\r | |
269 | )\r | |
270 | {\r | |
271 | //\r | |
272 | // to utf8, all kind of characters are supported.\r | |
273 | //\r | |
274 | return EFI_SUCCESS;\r | |
275 | }\r |