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24d56127 | 1 | /* Conversion UTF-8 to UCS-4. |
61cd9dc9 | 2 | Copyright (C) 2001-2002, 2006-2007, 2009-2010 Free Software Foundation, Inc. |
24d56127 LC |
3 | Written by Bruno Haible <bruno@clisp.org>, 2001. |
4 | ||
5 | This program is free software: you can redistribute it and/or modify it | |
6 | under the terms of the GNU Lesser General Public License as published | |
7 | by the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <config.h> | |
19 | ||
20 | /* Specification. */ | |
21 | #include "unistr.h" | |
22 | ||
23 | #if defined IN_LIBUNISTRING || HAVE_INLINE | |
24 | ||
25 | int | |
26 | u8_mbtouc_aux (ucs4_t *puc, const uint8_t *s, size_t n) | |
27 | { | |
28 | uint8_t c = *s; | |
29 | ||
30 | if (c >= 0xc2) | |
31 | { | |
32 | if (c < 0xe0) | |
1cd4fffc LC |
33 | { |
34 | if (n >= 2) | |
35 | { | |
36 | if ((s[1] ^ 0x80) < 0x40) | |
37 | { | |
38 | *puc = ((unsigned int) (c & 0x1f) << 6) | |
39 | | (unsigned int) (s[1] ^ 0x80); | |
40 | return 2; | |
41 | } | |
42 | /* invalid multibyte character */ | |
43 | } | |
44 | else | |
45 | { | |
46 | /* incomplete multibyte character */ | |
47 | *puc = 0xfffd; | |
0f00f2c3 | 48 | return 1; |
1cd4fffc LC |
49 | } |
50 | } | |
24d56127 | 51 | else if (c < 0xf0) |
1cd4fffc LC |
52 | { |
53 | if (n >= 3) | |
54 | { | |
0f00f2c3 | 55 | if ((s[1] ^ 0x80) < 0x40) |
1cd4fffc | 56 | { |
0f00f2c3 LC |
57 | if ((s[2] ^ 0x80) < 0x40) |
58 | { | |
59 | if ((c >= 0xe1 || s[1] >= 0xa0) | |
60 | && (c != 0xed || s[1] < 0xa0)) | |
61 | { | |
62 | *puc = ((unsigned int) (c & 0x0f) << 12) | |
63 | | ((unsigned int) (s[1] ^ 0x80) << 6) | |
64 | | (unsigned int) (s[2] ^ 0x80); | |
65 | return 3; | |
66 | } | |
67 | /* invalid multibyte character */ | |
68 | *puc = 0xfffd; | |
69 | return 3; | |
70 | } | |
71 | /* invalid multibyte character */ | |
72 | *puc = 0xfffd; | |
73 | return 2; | |
1cd4fffc LC |
74 | } |
75 | /* invalid multibyte character */ | |
76 | } | |
77 | else | |
78 | { | |
79 | /* incomplete multibyte character */ | |
80 | *puc = 0xfffd; | |
0f00f2c3 LC |
81 | if (n == 1 || (s[1] ^ 0x80) >= 0x40) |
82 | return 1; | |
83 | else | |
84 | return 2; | |
1cd4fffc LC |
85 | } |
86 | } | |
24d56127 | 87 | else if (c < 0xf8) |
1cd4fffc LC |
88 | { |
89 | if (n >= 4) | |
90 | { | |
0f00f2c3 LC |
91 | if ((s[1] ^ 0x80) < 0x40) |
92 | { | |
93 | if ((s[2] ^ 0x80) < 0x40) | |
94 | { | |
95 | if ((s[3] ^ 0x80) < 0x40) | |
96 | { | |
97 | if ((c >= 0xf1 || s[1] >= 0x90) | |
24d56127 | 98 | #if 1 |
0f00f2c3 | 99 | && (c < 0xf4 || (c == 0xf4 && s[1] < 0x90)) |
24d56127 | 100 | #endif |
0f00f2c3 LC |
101 | ) |
102 | { | |
103 | *puc = ((unsigned int) (c & 0x07) << 18) | |
104 | | ((unsigned int) (s[1] ^ 0x80) << 12) | |
105 | | ((unsigned int) (s[2] ^ 0x80) << 6) | |
106 | | (unsigned int) (s[3] ^ 0x80); | |
107 | return 4; | |
108 | } | |
109 | /* invalid multibyte character */ | |
110 | *puc = 0xfffd; | |
111 | return 4; | |
112 | } | |
113 | /* invalid multibyte character */ | |
114 | *puc = 0xfffd; | |
115 | return 3; | |
116 | } | |
117 | /* invalid multibyte character */ | |
118 | *puc = 0xfffd; | |
119 | return 2; | |
1cd4fffc LC |
120 | } |
121 | /* invalid multibyte character */ | |
122 | } | |
123 | else | |
124 | { | |
125 | /* incomplete multibyte character */ | |
126 | *puc = 0xfffd; | |
0f00f2c3 LC |
127 | if (n == 1 || (s[1] ^ 0x80) >= 0x40) |
128 | return 1; | |
129 | else if (n == 2 || (s[2] ^ 0x80) >= 0x40) | |
130 | return 2; | |
131 | else | |
132 | return 3; | |
1cd4fffc LC |
133 | } |
134 | } | |
24d56127 LC |
135 | #if 0 |
136 | else if (c < 0xfc) | |
1cd4fffc LC |
137 | { |
138 | if (n >= 5) | |
139 | { | |
0f00f2c3 | 140 | if ((s[1] ^ 0x80) < 0x40) |
1cd4fffc | 141 | { |
0f00f2c3 LC |
142 | if ((s[2] ^ 0x80) < 0x40) |
143 | { | |
144 | if ((s[3] ^ 0x80) < 0x40) | |
145 | { | |
146 | if ((s[4] ^ 0x80) < 0x40) | |
147 | { | |
148 | if (c >= 0xf9 || s[1] >= 0x88) | |
149 | { | |
150 | *puc = ((unsigned int) (c & 0x03) << 24) | |
151 | | ((unsigned int) (s[1] ^ 0x80) << 18) | |
152 | | ((unsigned int) (s[2] ^ 0x80) << 12) | |
153 | | ((unsigned int) (s[3] ^ 0x80) << 6) | |
154 | | (unsigned int) (s[4] ^ 0x80); | |
155 | return 5; | |
156 | } | |
157 | /* invalid multibyte character */ | |
158 | *puc = 0xfffd; | |
159 | return 5; | |
160 | } | |
161 | /* invalid multibyte character */ | |
162 | *puc = 0xfffd; | |
163 | return 4; | |
164 | } | |
165 | /* invalid multibyte character */ | |
166 | *puc = 0xfffd; | |
167 | return 3; | |
168 | } | |
169 | /* invalid multibyte character */ | |
170 | return 2; | |
1cd4fffc LC |
171 | } |
172 | /* invalid multibyte character */ | |
173 | } | |
174 | else | |
175 | { | |
176 | /* incomplete multibyte character */ | |
177 | *puc = 0xfffd; | |
178 | return n; | |
179 | } | |
180 | } | |
24d56127 | 181 | else if (c < 0xfe) |
1cd4fffc LC |
182 | { |
183 | if (n >= 6) | |
184 | { | |
0f00f2c3 | 185 | if ((s[1] ^ 0x80) < 0x40) |
1cd4fffc | 186 | { |
0f00f2c3 LC |
187 | if ((s[2] ^ 0x80) < 0x40) |
188 | { | |
189 | if ((s[3] ^ 0x80) < 0x40) | |
190 | { | |
191 | if ((s[4] ^ 0x80) < 0x40) | |
192 | { | |
193 | if ((s[5] ^ 0x80) < 0x40) | |
194 | { | |
195 | if (c >= 0xfd || s[1] >= 0x84) | |
196 | { | |
197 | *puc = ((unsigned int) (c & 0x01) << 30) | |
198 | | ((unsigned int) (s[1] ^ 0x80) << 24) | |
199 | | ((unsigned int) (s[2] ^ 0x80) << 18) | |
200 | | ((unsigned int) (s[3] ^ 0x80) << 12) | |
201 | | ((unsigned int) (s[4] ^ 0x80) << 6) | |
202 | | (unsigned int) (s[5] ^ 0x80); | |
203 | return 6; | |
204 | } | |
205 | /* invalid multibyte character */ | |
206 | *puc = 0xfffd; | |
207 | return 6; | |
208 | } | |
209 | /* invalid multibyte character */ | |
210 | *puc = 0xfffd; | |
211 | return 5; | |
212 | } | |
213 | /* invalid multibyte character */ | |
214 | *puc = 0xfffd; | |
215 | return 4; | |
216 | } | |
217 | /* invalid multibyte character */ | |
218 | *puc = 0xfffd; | |
219 | return 3; | |
220 | } | |
221 | /* invalid multibyte character */ | |
222 | return 2; | |
1cd4fffc LC |
223 | } |
224 | /* invalid multibyte character */ | |
225 | } | |
226 | else | |
227 | { | |
228 | /* incomplete multibyte character */ | |
229 | *puc = 0xfffd; | |
230 | return n; | |
231 | } | |
232 | } | |
24d56127 LC |
233 | #endif |
234 | } | |
235 | /* invalid multibyte character */ | |
236 | *puc = 0xfffd; | |
237 | return 1; | |
238 | } | |
239 | ||
240 | #endif |