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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 | * | |
73d5a30a | 9 | * SPDX-License-Identifier: LGPL-2.1-or-later or AFL-2.0 |
cf31d981 SI |
10 | */ |
11 | ||
12 | #ifdef HAVE_CONFIG_H | |
13 | #include <config.h> | |
14 | #endif | |
15 | ||
16 | #include "xdgmimeint.h" | |
17 | #include <ctype.h> | |
18 | #include <string.h> | |
19 | ||
20 | #ifndef FALSE | |
21 | #define FALSE (0) | |
22 | #endif | |
23 | ||
24 | #ifndef TRUE | |
25 | #define TRUE (!FALSE) | |
26 | #endif | |
27 | ||
28 | static const char _xdg_utf8_skip_data[256] = { | |
29 | 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, | |
30 | 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, | |
31 | 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, | |
32 | 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, | |
33 | 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, | |
34 | 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, | |
35 | 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, | |
36 | 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 | |
37 | }; | |
38 | ||
39 | const char * const _xdg_utf8_skip = _xdg_utf8_skip_data; | |
40 | ||
41 | ||
42 | ||
43 | /* Returns the number of unprocessed characters. */ | |
44 | xdg_unichar_t | |
45 | _xdg_utf8_to_ucs4(const char *source) | |
46 | { | |
47 | xdg_unichar_t ucs32; | |
48 | if( ! ( *source & 0x80 ) ) | |
49 | { | |
50 | ucs32 = *source; | |
51 | } | |
52 | else | |
53 | { | |
54 | int bytelength = 0; | |
55 | xdg_unichar_t result; | |
56 | if ( ! (*source & 0x40) ) | |
57 | { | |
58 | ucs32 = *source; | |
59 | } | |
60 | else | |
61 | { | |
62 | if ( ! (*source & 0x20) ) | |
63 | { | |
64 | result = *source++ & 0x1F; | |
65 | bytelength = 2; | |
66 | } | |
67 | else if ( ! (*source & 0x10) ) | |
68 | { | |
69 | result = *source++ & 0x0F; | |
70 | bytelength = 3; | |
71 | } | |
72 | else if ( ! (*source & 0x08) ) | |
73 | { | |
74 | result = *source++ & 0x07; | |
75 | bytelength = 4; | |
76 | } | |
77 | else if ( ! (*source & 0x04) ) | |
78 | { | |
79 | result = *source++ & 0x03; | |
80 | bytelength = 5; | |
81 | } | |
82 | else if ( ! (*source & 0x02) ) | |
83 | { | |
84 | result = *source++ & 0x01; | |
85 | bytelength = 6; | |
86 | } | |
87 | else | |
88 | { | |
89 | result = *source++; | |
90 | bytelength = 1; | |
91 | } | |
92 | ||
93 | for ( bytelength --; bytelength > 0; bytelength -- ) | |
94 | { | |
95 | result <<= 6; | |
96 | result |= *source++ & 0x3F; | |
97 | } | |
98 | ucs32 = result; | |
99 | } | |
100 | } | |
101 | return ucs32; | |
102 | } | |
103 | ||
104 | ||
105 | /* hullo. this is great code. don't rewrite it */ | |
106 | ||
107 | xdg_unichar_t | |
108 | _xdg_ucs4_to_lower (xdg_unichar_t source) | |
109 | { | |
110 | /* FIXME: Do a real to_upper sometime */ | |
111 | /* CaseFolding-3.2.0.txt has a table of rules. */ | |
112 | if ((source & 0xFF) == source) | |
113 | return (xdg_unichar_t) tolower ((unsigned char) source); | |
114 | return source; | |
115 | } | |
116 | ||
117 | int | |
118 | _xdg_utf8_validate (const char *source) | |
119 | { | |
120 | /* FIXME: actually write */ | |
121 | return TRUE; | |
122 | } | |
123 | ||
124 | const char * | |
125 | _xdg_get_base_name (const char *file_name) | |
126 | { | |
127 | const char *base_name; | |
128 | ||
129 | if (file_name == NULL) | |
130 | return NULL; | |
131 | ||
132 | base_name = strrchr (file_name, '/'); | |
133 | ||
134 | if (base_name == NULL) | |
135 | return file_name; | |
136 | else | |
137 | return base_name + 1; | |
138 | } | |
139 | ||
140 | xdg_unichar_t * | |
141 | _xdg_convert_to_ucs4 (const char *source, int *len) | |
142 | { | |
143 | xdg_unichar_t *out; | |
144 | int i; | |
145 | const char *p; | |
146 | ||
147 | out = malloc (sizeof (xdg_unichar_t) * (strlen (source) + 1)); | |
148 | ||
149 | p = source; | |
150 | i = 0; | |
151 | while (*p) | |
152 | { | |
153 | out[i++] = _xdg_utf8_to_ucs4 (p); | |
154 | p = _xdg_utf8_next_char (p); | |
155 | } | |
156 | out[i] = 0; | |
157 | *len = i; | |
158 | ||
159 | return out; | |
160 | } | |
161 | ||
162 | void | |
163 | _xdg_reverse_ucs4 (xdg_unichar_t *source, int len) | |
164 | { | |
165 | xdg_unichar_t c; | |
166 | int i; | |
167 | ||
168 | for (i = 0; i < len - i - 1; i++) | |
169 | { | |
170 | c = source[i]; | |
171 | source[i] = source[len - i - 1]; | |
172 | source[len - i - 1] = c; | |
173 | } | |
174 | } | |
175 | ||
176 | const char * | |
177 | _xdg_binary_or_text_fallback(const void *data, size_t len) | |
178 | { | |
179 | unsigned char *chardata; | |
180 | size_t i; | |
181 | ||
182 | chardata = (unsigned char *) data; | |
183 | for (i = 0; i < 128 && i < len; ++i) | |
184 | { | |
185 | if (chardata[i] < 32 && chardata[i] != 9 && chardata[i] != 10 && chardata[i] != 13) | |
186 | return XDG_MIME_TYPE_UNKNOWN; /* binary data */ | |
187 | } | |
188 | ||
189 | return XDG_MIME_TYPE_TEXTPLAIN; | |
190 | } |