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
44static 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
55const char * const _xdg_utf8_skip = _xdg_utf8_skip_data;
56
57
58
59/* Returns the number of unprocessed characters. */
60xdg_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
123xdg_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
133int
134_xdg_utf8_validate (const char *source)
135{
136  /* FIXME: actually write */
137  return TRUE;
138}
139
140const 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
156xdg_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
178void
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