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1 | /* -*- mode: C; c-file-style: "gnu" -*- */ |
2 | /* xdgmimeint.c: Internal defines and functions. | |
3 | * | |
4 | * More info can be found at http://www.freedesktop.org/standards/ | |
5 | * | |
6 | * Copyright (C) 2003 Red Hat, Inc. | |
7 | * Copyright (C) 2003 Jonathan Blandford <jrb@alum.mit.edu> | |
8 | * | |
9 | * Licensed under the Academic Free License version 2.0 | |
10 | * Or under the following terms: | |
11 | * | |
12 | * This library is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU Lesser General Public | |
14 | * License as published by the Free Software Foundation; either | |
15 | * version 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * This library is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * Lesser General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU Lesser General Public | |
23 | * License along with this library; if not, write to the | |
24 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
25 | * Boston, MA 02111-1307, USA. | |
26 | */ | |
27 | ||
28 | #ifdef HAVE_CONFIG_H | |
29 | #include <config.h> | |
30 | #endif | |
31 | ||
32 | #include "xdgmimeint.h" | |
33 | #include <ctype.h> | |
34 | #include <string.h> | |
35 | ||
36 | #ifndef FALSE | |
37 | #define FALSE (0) | |
38 | #endif | |
39 | ||
40 | #ifndef TRUE | |
41 | #define TRUE (!FALSE) | |
42 | #endif | |
43 | ||
44 | static const char _xdg_utf8_skip_data[256] = { | |
45 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
46 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
47 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
48 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
49 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
50 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
51 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | |
52 | 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1 | |
53 | }; | |
54 | ||
55 | const char * const _xdg_utf8_skip = _xdg_utf8_skip_data; | |
56 | ||
57 | ||
58 | ||
59 | /* Returns the number of unprocessed characters. */ | |
60 | xdg_unichar_t | |
61 | _xdg_utf8_to_ucs4(const char *source) | |
62 | { | |
63 | xdg_unichar_t ucs32; | |
64 | if( ! ( *source & 0x80 ) ) | |
65 | { | |
66 | ucs32 = *source; | |
67 | } | |
68 | else | |
69 | { | |
70 | int bytelength = 0; | |
71 | xdg_unichar_t result; | |
72 | if ( ! (*source & 0x40) ) | |
73 | { | |
74 | ucs32 = *source; | |
75 | } | |
76 | else | |
77 | { | |
78 | if ( ! (*source & 0x20) ) | |
79 | { | |
80 | result = *source++ & 0x1F; | |
81 | bytelength = 2; | |
82 | } | |
83 | else if ( ! (*source & 0x10) ) | |
84 | { | |
85 | result = *source++ & 0x0F; | |
86 | bytelength = 3; | |
87 | } | |
88 | else if ( ! (*source & 0x08) ) | |
89 | { | |
90 | result = *source++ & 0x07; | |
91 | bytelength = 4; | |
92 | } | |
93 | else if ( ! (*source & 0x04) ) | |
94 | { | |
95 | result = *source++ & 0x03; | |
96 | bytelength = 5; | |
97 | } | |
98 | else if ( ! (*source & 0x02) ) | |
99 | { | |
100 | result = *source++ & 0x01; | |
101 | bytelength = 6; | |
102 | } | |
103 | else | |
104 | { | |
105 | result = *source++; | |
106 | bytelength = 1; | |
107 | } | |
108 | ||
109 | for ( bytelength --; bytelength > 0; bytelength -- ) | |
110 | { | |
111 | result <<= 6; | |
112 | result |= *source++ & 0x3F; | |
113 | } | |
114 | ucs32 = result; | |
115 | } | |
116 | } | |
117 | return ucs32; | |
118 | } | |
119 | ||
120 | ||
121 | /* hullo. this is great code. don't rewrite it */ | |
122 | ||
123 | xdg_unichar_t | |
124 | _xdg_ucs4_to_lower (xdg_unichar_t source) | |
125 | { | |
126 | /* FIXME: Do a real to_upper sometime */ | |
127 | /* CaseFolding-3.2.0.txt has a table of rules. */ | |
128 | if ((source & 0xFF) == source) | |
129 | return (xdg_unichar_t) tolower ((unsigned char) source); | |
130 | return source; | |
131 | } | |
132 | ||
133 | int | |
134 | _xdg_utf8_validate (const char *source) | |
135 | { | |
136 | /* FIXME: actually write */ | |
137 | return TRUE; | |
138 | } | |
139 | ||
140 | const char * | |
141 | _xdg_get_base_name (const char *file_name) | |
142 | { | |
143 | const char *base_name; | |
144 | ||
145 | if (file_name == NULL) | |
146 | return NULL; | |
147 | ||
148 | base_name = strrchr (file_name, '/'); | |
149 | ||
150 | if (base_name == NULL) | |
151 | return file_name; | |
152 | else | |
153 | return base_name + 1; | |
154 | } | |
155 | ||
156 | xdg_unichar_t * | |
157 | _xdg_convert_to_ucs4 (const char *source, int *len) | |
158 | { | |
159 | xdg_unichar_t *out; | |
160 | int i; | |
161 | const char *p; | |
162 | ||
163 | out = malloc (sizeof (xdg_unichar_t) * (strlen (source) + 1)); | |
164 | ||
165 | p = source; | |
166 | i = 0; | |
167 | while (*p) | |
168 | { | |
169 | out[i++] = _xdg_utf8_to_ucs4 (p); | |
170 | p = _xdg_utf8_next_char (p); | |
171 | } | |
172 | out[i] = 0; | |
173 | *len = i; | |
174 | ||
175 | return out; | |
176 | } | |
177 | ||
178 | void | |
179 | _xdg_reverse_ucs4 (xdg_unichar_t *source, int len) | |
180 | { | |
181 | xdg_unichar_t c; | |
182 | int i; | |
183 | ||
184 | for (i = 0; i < len - i - 1; i++) | |
185 | { | |
186 | c = source[i]; | |
187 | source[i] = source[len - i - 1]; | |
188 | source[len - i - 1] = c; | |
189 | } | |
190 | } | |
191 | ||
192 | const char * | |
193 | _xdg_binary_or_text_fallback(const void *data, size_t len) | |
194 | { | |
195 | unsigned char *chardata; | |
196 | size_t i; | |
197 | ||
198 | chardata = (unsigned char *) data; | |
199 | for (i = 0; i < 128 && i < len; ++i) | |
200 | { | |
201 | if (chardata[i] < 32 && chardata[i] != 9 && chardata[i] != 10 && chardata[i] != 13) | |
202 | return XDG_MIME_TYPE_UNKNOWN; /* binary data */ | |
203 | } | |
204 | ||
205 | return XDG_MIME_TYPE_TEXTPLAIN; | |
206 | } |