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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 int i; | |
| 197 | |
| 198 chardata = (unsigned char *) data; | |
| 199 for (i = 0; i < 32 && 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 } | |
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