summaryrefslogtreecommitdiff
path: root/src/FreeType/ftsystem.c
blob: ae5aa0092bdd209aef254899e370c78332ba3eaa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
/***************************************************************************/
/*                                                                         */
/*  ftsystem.c                                                             */
/*                                                                         */
/*    ANSI-specific FreeType low-level system interface (body).            */
/*                                                                         */
/*  Copyright 1996-2001, 2002 by                                           */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  Modified for XFree86.                                                  */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/

/* Modified for XFree86 */
/* $XFree86$ */

  /*************************************************************************/
  /*                                                                       */
  /* This file contains the default interface used by FreeType to access   */
  /* low-level, i.e. memory management, i/o access as well as thread       */
  /* synchronisation.  It can be replaced by user-specific routines if     */
  /* necessary.                                                            */
  /*                                                                       */
  /*************************************************************************/


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <ft2build.h>
#include FT_CONFIG_CONFIG_H
#include FT_SYSTEM_H
#include FT_ERRORS_H
#include FT_TYPES_H

#ifndef FONTMODULE
#include <stdio.h>
#include <stdlib.h>
#else
#include "Xmd.h"
#define _XTYPEDEF_BOOL
#include "Xdefs.h"
#define DONT_DEFINE_WRAPPERS
#include "xf86_ansic.h"
#undef DONT_DEFINE_WRAPPERS
#define malloc(x) xf86malloc(x)
#define realloc(x, y) xf86realloc(x, y)
#define free(x) xf86free(x)
#define FILE XF86FILE
#define fopen(x, y) xf86fopen(x, y)
#define fclose(x) xf86fclose(x)
#define fseek(x, y, z) xf86fseek(x, y, z)
#define ftell(x) xf86ftell(x)
#define SEEK_SET XF86_SEEK_SET
#define SEEK_END XF86_SEEK_END
#define fread(x, y, z, t) xf86fread(x, y, z, t)
#endif


  /*************************************************************************/
  /*                                                                       */
  /*                       MEMORY MANAGEMENT INTERFACE                     */
  /*                                                                       */
  /*************************************************************************/

  /*************************************************************************/
  /*                                                                       */
  /* It is not necessary to do any error checking for the                  */
  /* allocation-related functions.  This will be done by the higher level  */
  /* routines like FT_Alloc() or FT_Realloc().                             */
  /*                                                                       */
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    ft_alloc                                                           */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The memory allocation function.                                    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory :: A pointer to the memory object.                          */
  /*                                                                       */
  /*    size   :: The requested size in bytes.                             */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The address of newly allocated block.                              */
  /*                                                                       */
  FT_CALLBACK_DEF( void* )
  ft_alloc( FT_Memory  memory,
            long       size )
  {
    FT_UNUSED( memory );

    return malloc( size );
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    ft_realloc                                                         */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The memory reallocation function.                                  */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory   :: A pointer to the memory object.                        */
  /*                                                                       */
  /*    cur_size :: The current size of the allocated memory block.        */
  /*                                                                       */
  /*    new_size :: The newly requested size in bytes.                     */
  /*                                                                       */
  /*    block    :: The current address of the block in memory.            */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The address of the reallocated memory block.                       */
  /*                                                                       */
  FT_CALLBACK_DEF( void* )
  ft_realloc( FT_Memory  memory,
              long       cur_size,
              long       new_size,
              void*      block )
  {
    FT_UNUSED( memory );
    FT_UNUSED( cur_size );

    return realloc( block, new_size );
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    ft_free                                                            */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The memory release function.                                       */
  /*                                                                       */
  /* <Input>                                                               */
  /*    memory  :: A pointer to the memory object.                         */
  /*                                                                       */
  /*    block   :: The address of block in memory to be freed.             */
  /*                                                                       */
  FT_CALLBACK_DEF( void )
  ft_free( FT_Memory  memory,
           void*      block )
  {
    FT_UNUSED( memory );

    free( block );
  }


  /*************************************************************************/
  /*                                                                       */
  /*                     RESOURCE MANAGEMENT INTERFACE                     */
  /*                                                                       */
  /*************************************************************************/


  /*************************************************************************/
  /*                                                                       */
  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  /* messages during execution.                                            */
  /*                                                                       */
#undef  FT_COMPONENT
#define FT_COMPONENT  trace_io

  /* We use the macro STREAM_FILE for convenience to extract the       */
  /* system-specific stream handle from a given FreeType stream object */
#define STREAM_FILE( stream )  ( (FILE*)stream->descriptor.pointer )


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    ft_ansi_stream_close                                               */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The function to close a stream.                                    */
  /*                                                                       */
  /* <Input>                                                               */
  /*    stream :: A pointer to the stream object.                          */
  /*                                                                       */
  FT_CALLBACK_DEF( void )
  ft_ansi_stream_close( FT_Stream  stream )
  {
    fclose( STREAM_FILE( stream ) );

    stream->descriptor.pointer = NULL;
    stream->size               = 0;
    stream->base               = 0;
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    ft_ansi_stream_io                                                  */
  /*                                                                       */
  /* <Description>                                                         */
  /*    The function to open a stream.                                     */
  /*                                                                       */
  /* <Input>                                                               */
  /*    stream :: A pointer to the stream object.                          */
  /*                                                                       */
  /*    offset :: The position in the data stream to start reading.        */
  /*                                                                       */
  /*    buffer :: The address of buffer to store the read data.            */
  /*                                                                       */
  /*    count  :: The number of bytes to read from the stream.             */
  /*                                                                       */
  /* <Return>                                                              */
  /*    The number of bytes actually read.                                 */
  /*                                                                       */
  FT_CALLBACK_DEF( unsigned long )
  ft_ansi_stream_io( FT_Stream       stream,
                     unsigned long   offset,
                     unsigned char*  buffer,
                     unsigned long   count )
  {
    FILE*  file;


    file = STREAM_FILE( stream );

    fseek( file, offset, SEEK_SET );

    return (unsigned long)fread( buffer, 1, count, file );
  }


  /* documentation is in ftobjs.h */

  FT_EXPORT_DEF( FT_Error )
  FT_Stream_Open( FT_Stream    stream,
                  const char*  filepathname )
  {
    FILE*  file;


    if ( !stream )
      return FT_Err_Invalid_Stream_Handle;

    file = fopen( filepathname, "rb" );
    if ( !file )
    {
      FT_ERROR(( "FT_Stream_Open:" ));
      FT_ERROR(( " could not open `%s'\n", filepathname ));

      return FT_Err_Cannot_Open_Resource;
    }

    fseek( file, 0, SEEK_END );
    stream->size = ftell( file );
    fseek( file, 0, SEEK_SET );

    stream->descriptor.pointer = file;
    stream->pathname.pointer   = (char*)filepathname;
    stream->pos                = 0;

    stream->read  = ft_ansi_stream_io;
    stream->close = ft_ansi_stream_close;

    FT_TRACE1(( "FT_Stream_Open:" ));
    FT_TRACE1(( " opened `%s' (%d bytes) successfully\n",
                filepathname, stream->size ));

    return FT_Err_Ok;
  }


#ifdef FT_DEBUG_MEMORY

  extern FT_Int
  ft_mem_debug_init( FT_Memory  memory );

  extern void
  ft_mem_debug_done( FT_Memory  memory );

#endif


  /* documentation is in ftobjs.h */

  FT_EXPORT_DEF( FT_Memory )
  FT_New_Memory( void )
  {
    FT_Memory  memory;


    memory = (FT_Memory)malloc( sizeof ( *memory ) );
    if ( memory )
    {
      memory->user    = 0;
      memory->alloc   = ft_alloc;
      memory->realloc = ft_realloc;
      memory->free    = ft_free;
#ifdef FT_DEBUG_MEMORY
      ft_mem_debug_init( memory );
#endif
    }

    return memory;
  }


  /* documentation is in ftobjs.h */

  FT_EXPORT_DEF( void )
  FT_Done_Memory( FT_Memory  memory )
  {
#ifdef FT_DEBUG_MEMORY
    ft_mem_debug_done( memory );
#endif
#undef free
    memory->free( memory, memory );
  }


/* END */