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/src/freetype/include/freetype/internal/ftstream.h

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C++ Header | 539 lines | 325 code | 130 blank | 84 comment | 1 complexity | 38cc74ba7f45084ad636efb3d5f1ebd4 MD5 | raw file
  1/***************************************************************************/
  2/*                                                                         */
  3/*  ftstream.h                                                             */
  4/*                                                                         */
  5/*    Stream handling (specification).                                     */
  6/*                                                                         */
  7/*  Copyright 1996-2002, 2004-2006, 2011 by                                */
  8/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
  9/*                                                                         */
 10/*  This file is part of the FreeType project, and may only be used,       */
 11/*  modified, and distributed under the terms of the FreeType project      */
 12/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
 13/*  this file you indicate that you have read the license and              */
 14/*  understand and accept it fully.                                        */
 15/*                                                                         */
 16/***************************************************************************/
 17
 18
 19#ifndef __FTSTREAM_H__
 20#define __FTSTREAM_H__
 21
 22
 23#include <ft2build.h>
 24#include FT_SYSTEM_H
 25#include FT_INTERNAL_OBJECTS_H
 26
 27
 28FT_BEGIN_HEADER
 29
 30
 31  /* format of an 8-bit frame_op value:           */
 32  /*                                              */
 33  /* bit  76543210                                */
 34  /*      xxxxxxes                                */
 35  /*                                              */
 36  /* s is set to 1 if the value is signed.        */
 37  /* e is set to 1 if the value is little-endian. */
 38  /* xxx is a command.                            */
 39
 40#define FT_FRAME_OP_SHIFT         2
 41#define FT_FRAME_OP_SIGNED        1
 42#define FT_FRAME_OP_LITTLE        2
 43#define FT_FRAME_OP_COMMAND( x )  ( x >> FT_FRAME_OP_SHIFT )
 44
 45#define FT_MAKE_FRAME_OP( command, little, sign ) \
 46          ( ( command << FT_FRAME_OP_SHIFT ) | ( little << 1 ) | sign )
 47
 48#define FT_FRAME_OP_END    0
 49#define FT_FRAME_OP_START  1  /* start a new frame     */
 50#define FT_FRAME_OP_BYTE   2  /* read 1-byte value     */
 51#define FT_FRAME_OP_SHORT  3  /* read 2-byte value     */
 52#define FT_FRAME_OP_LONG   4  /* read 4-byte value     */
 53#define FT_FRAME_OP_OFF3   5  /* read 3-byte value     */
 54#define FT_FRAME_OP_BYTES  6  /* read a bytes sequence */
 55
 56
 57  typedef enum  FT_Frame_Op_
 58  {
 59    ft_frame_end       = 0,
 60    ft_frame_start     = FT_MAKE_FRAME_OP( FT_FRAME_OP_START, 0, 0 ),
 61
 62    ft_frame_byte      = FT_MAKE_FRAME_OP( FT_FRAME_OP_BYTE,  0, 0 ),
 63    ft_frame_schar     = FT_MAKE_FRAME_OP( FT_FRAME_OP_BYTE,  0, 1 ),
 64
 65    ft_frame_ushort_be = FT_MAKE_FRAME_OP( FT_FRAME_OP_SHORT, 0, 0 ),
 66    ft_frame_short_be  = FT_MAKE_FRAME_OP( FT_FRAME_OP_SHORT, 0, 1 ),
 67    ft_frame_ushort_le = FT_MAKE_FRAME_OP( FT_FRAME_OP_SHORT, 1, 0 ),
 68    ft_frame_short_le  = FT_MAKE_FRAME_OP( FT_FRAME_OP_SHORT, 1, 1 ),
 69
 70    ft_frame_ulong_be  = FT_MAKE_FRAME_OP( FT_FRAME_OP_LONG, 0, 0 ),
 71    ft_frame_long_be   = FT_MAKE_FRAME_OP( FT_FRAME_OP_LONG, 0, 1 ),
 72    ft_frame_ulong_le  = FT_MAKE_FRAME_OP( FT_FRAME_OP_LONG, 1, 0 ),
 73    ft_frame_long_le   = FT_MAKE_FRAME_OP( FT_FRAME_OP_LONG, 1, 1 ),
 74
 75    ft_frame_uoff3_be  = FT_MAKE_FRAME_OP( FT_FRAME_OP_OFF3, 0, 0 ),
 76    ft_frame_off3_be   = FT_MAKE_FRAME_OP( FT_FRAME_OP_OFF3, 0, 1 ),
 77    ft_frame_uoff3_le  = FT_MAKE_FRAME_OP( FT_FRAME_OP_OFF3, 1, 0 ),
 78    ft_frame_off3_le   = FT_MAKE_FRAME_OP( FT_FRAME_OP_OFF3, 1, 1 ),
 79
 80    ft_frame_bytes     = FT_MAKE_FRAME_OP( FT_FRAME_OP_BYTES, 0, 0 ),
 81    ft_frame_skip      = FT_MAKE_FRAME_OP( FT_FRAME_OP_BYTES, 0, 1 )
 82
 83  } FT_Frame_Op;
 84
 85
 86  typedef struct  FT_Frame_Field_
 87  {
 88    FT_Byte    value;
 89    FT_Byte    size;
 90    FT_UShort  offset;
 91
 92  } FT_Frame_Field;
 93
 94
 95  /* Construct an FT_Frame_Field out of a structure type and a field name. */
 96  /* The structure type must be set in the FT_STRUCTURE macro before       */
 97  /* calling the FT_FRAME_START() macro.                                   */
 98  /*                                                                       */
 99#define FT_FIELD_SIZE( f ) \
100          (FT_Byte)sizeof ( ((FT_STRUCTURE*)0)->f )
101
102#define FT_FIELD_SIZE_DELTA( f ) \
103          (FT_Byte)sizeof ( ((FT_STRUCTURE*)0)->f[0] )
104
105#define FT_FIELD_OFFSET( f ) \
106          (FT_UShort)( offsetof( FT_STRUCTURE, f ) )
107
108#define FT_FRAME_FIELD( frame_op, field ) \
109          {                               \
110            frame_op,                     \
111            FT_FIELD_SIZE( field ),       \
112            FT_FIELD_OFFSET( field )      \
113          }
114
115#define FT_MAKE_EMPTY_FIELD( frame_op )  { frame_op, 0, 0 }
116
117#define FT_FRAME_START( size )   { ft_frame_start, 0, size }
118#define FT_FRAME_END             { ft_frame_end, 0, 0 }
119
120#define FT_FRAME_LONG( f )       FT_FRAME_FIELD( ft_frame_long_be, f )
121#define FT_FRAME_ULONG( f )      FT_FRAME_FIELD( ft_frame_ulong_be, f )
122#define FT_FRAME_SHORT( f )      FT_FRAME_FIELD( ft_frame_short_be, f )
123#define FT_FRAME_USHORT( f )     FT_FRAME_FIELD( ft_frame_ushort_be, f )
124#define FT_FRAME_OFF3( f )       FT_FRAME_FIELD( ft_frame_off3_be, f )
125#define FT_FRAME_UOFF3( f )      FT_FRAME_FIELD( ft_frame_uoff3_be, f )
126#define FT_FRAME_BYTE( f )       FT_FRAME_FIELD( ft_frame_byte, f )
127#define FT_FRAME_CHAR( f )       FT_FRAME_FIELD( ft_frame_schar, f )
128
129#define FT_FRAME_LONG_LE( f )    FT_FRAME_FIELD( ft_frame_long_le, f )
130#define FT_FRAME_ULONG_LE( f )   FT_FRAME_FIELD( ft_frame_ulong_le, f )
131#define FT_FRAME_SHORT_LE( f )   FT_FRAME_FIELD( ft_frame_short_le, f )
132#define FT_FRAME_USHORT_LE( f )  FT_FRAME_FIELD( ft_frame_ushort_le, f )
133#define FT_FRAME_OFF3_LE( f )    FT_FRAME_FIELD( ft_frame_off3_le, f )
134#define FT_FRAME_UOFF3_LE( f )   FT_FRAME_FIELD( ft_frame_uoff3_le, f )
135
136#define FT_FRAME_SKIP_LONG       { ft_frame_long_be, 0, 0 }
137#define FT_FRAME_SKIP_SHORT      { ft_frame_short_be, 0, 0 }
138#define FT_FRAME_SKIP_BYTE       { ft_frame_byte, 0, 0 }
139
140#define FT_FRAME_BYTES( field, count ) \
141          {                            \
142            ft_frame_bytes,            \
143            count,                     \
144            FT_FIELD_OFFSET( field )   \
145          }
146
147#define FT_FRAME_SKIP_BYTES( count )  { ft_frame_skip, count, 0 }
148
149
150  /*************************************************************************/
151  /*                                                                       */
152  /* Integer extraction macros -- the `buffer' parameter must ALWAYS be of */
153  /* type `char*' or equivalent (1-byte elements).                         */
154  /*                                                                       */
155
156#define FT_BYTE_( p, i )  ( ((const FT_Byte*)(p))[(i)] )
157#define FT_INT8_( p, i )  ( ((const FT_Char*)(p))[(i)] )
158
159#define FT_INT16( x )   ( (FT_Int16)(x)  )
160#define FT_UINT16( x )  ( (FT_UInt16)(x) )
161#define FT_INT32( x )   ( (FT_Int32)(x)  )
162#define FT_UINT32( x )  ( (FT_UInt32)(x) )
163
164#define FT_BYTE_I16( p, i, s )  ( FT_INT16(  FT_BYTE_( p, i ) ) << (s) )
165#define FT_BYTE_U16( p, i, s )  ( FT_UINT16( FT_BYTE_( p, i ) ) << (s) )
166#define FT_BYTE_I32( p, i, s )  ( FT_INT32(  FT_BYTE_( p, i ) ) << (s) )
167#define FT_BYTE_U32( p, i, s )  ( FT_UINT32( FT_BYTE_( p, i ) ) << (s) )
168
169#define FT_INT8_I16( p, i, s )  ( FT_INT16(  FT_INT8_( p, i ) ) << (s) )
170#define FT_INT8_U16( p, i, s )  ( FT_UINT16( FT_INT8_( p, i ) ) << (s) )
171#define FT_INT8_I32( p, i, s )  ( FT_INT32(  FT_INT8_( p, i ) ) << (s) )
172#define FT_INT8_U32( p, i, s )  ( FT_UINT32( FT_INT8_( p, i ) ) << (s) )
173
174
175#define FT_PEEK_SHORT( p )  FT_INT16( FT_INT8_I16( p, 0, 8) | \
176                                      FT_BYTE_I16( p, 1, 0) )
177
178#define FT_PEEK_USHORT( p )  FT_UINT16( FT_BYTE_U16( p, 0, 8 ) | \
179                                        FT_BYTE_U16( p, 1, 0 ) )
180
181#define FT_PEEK_LONG( p )  FT_INT32( FT_INT8_I32( p, 0, 24 ) | \
182                                     FT_BYTE_I32( p, 1, 16 ) | \
183                                     FT_BYTE_I32( p, 2,  8 ) | \
184                                     FT_BYTE_I32( p, 3,  0 ) )
185
186#define FT_PEEK_ULONG( p )  FT_UINT32( FT_BYTE_U32( p, 0, 24 ) | \
187                                       FT_BYTE_U32( p, 1, 16 ) | \
188                                       FT_BYTE_U32( p, 2,  8 ) | \
189                                       FT_BYTE_U32( p, 3,  0 ) )
190
191#define FT_PEEK_OFF3( p )  FT_INT32( FT_INT8_I32( p, 0, 16 ) | \
192                                     FT_BYTE_I32( p, 1,  8 ) | \
193                                     FT_BYTE_I32( p, 2,  0 ) )
194
195#define FT_PEEK_UOFF3( p )  FT_UINT32( FT_BYTE_U32( p, 0, 16 ) | \
196                                       FT_BYTE_U32( p, 1,  8 ) | \
197                                       FT_BYTE_U32( p, 2,  0 ) )
198
199#define FT_PEEK_SHORT_LE( p )  FT_INT16( FT_INT8_I16( p, 1, 8 ) | \
200                                         FT_BYTE_I16( p, 0, 0 ) )
201
202#define FT_PEEK_USHORT_LE( p )  FT_UINT16( FT_BYTE_U16( p, 1, 8 ) |  \
203                                           FT_BYTE_U16( p, 0, 0 ) )
204
205#define FT_PEEK_LONG_LE( p )  FT_INT32( FT_INT8_I32( p, 3, 24 ) | \
206                                        FT_BYTE_I32( p, 2, 16 ) | \
207                                        FT_BYTE_I32( p, 1,  8 ) | \
208                                        FT_BYTE_I32( p, 0,  0 ) )
209
210#define FT_PEEK_ULONG_LE( p )  FT_UINT32( FT_BYTE_U32( p, 3, 24 ) | \
211                                          FT_BYTE_U32( p, 2, 16 ) | \
212                                          FT_BYTE_U32( p, 1,  8 ) | \
213                                          FT_BYTE_U32( p, 0,  0 ) )
214
215#define FT_PEEK_OFF3_LE( p )  FT_INT32( FT_INT8_I32( p, 2, 16 ) | \
216                                        FT_BYTE_I32( p, 1,  8 ) | \
217                                        FT_BYTE_I32( p, 0,  0 ) )
218
219#define FT_PEEK_UOFF3_LE( p )  FT_UINT32( FT_BYTE_U32( p, 2, 16 ) | \
220                                          FT_BYTE_U32( p, 1,  8 ) | \
221                                          FT_BYTE_U32( p, 0,  0 ) )
222
223
224#define FT_NEXT_CHAR( buffer )       \
225          ( (signed char)*buffer++ )
226
227#define FT_NEXT_BYTE( buffer )         \
228          ( (unsigned char)*buffer++ )
229
230#define FT_NEXT_SHORT( buffer )                                   \
231          ( (short)( buffer += 2, FT_PEEK_SHORT( buffer - 2 ) ) )
232
233#define FT_NEXT_USHORT( buffer )                                            \
234          ( (unsigned short)( buffer += 2, FT_PEEK_USHORT( buffer - 2 ) ) )
235
236#define FT_NEXT_OFF3( buffer )                                  \
237          ( (long)( buffer += 3, FT_PEEK_OFF3( buffer - 3 ) ) )
238
239#define FT_NEXT_UOFF3( buffer )                                           \
240          ( (unsigned long)( buffer += 3, FT_PEEK_UOFF3( buffer - 3 ) ) )
241
242#define FT_NEXT_LONG( buffer )                                  \
243          ( (long)( buffer += 4, FT_PEEK_LONG( buffer - 4 ) ) )
244
245#define FT_NEXT_ULONG( buffer )                                           \
246          ( (unsigned long)( buffer += 4, FT_PEEK_ULONG( buffer - 4 ) ) )
247
248
249#define FT_NEXT_SHORT_LE( buffer )                                   \
250          ( (short)( buffer += 2, FT_PEEK_SHORT_LE( buffer - 2 ) ) )
251
252#define FT_NEXT_USHORT_LE( buffer )                                            \
253          ( (unsigned short)( buffer += 2, FT_PEEK_USHORT_LE( buffer - 2 ) ) )
254
255#define FT_NEXT_OFF3_LE( buffer )                                  \
256          ( (long)( buffer += 3, FT_PEEK_OFF3_LE( buffer - 3 ) ) )
257
258#define FT_NEXT_UOFF3_LE( buffer )                                           \
259          ( (unsigned long)( buffer += 3, FT_PEEK_UOFF3_LE( buffer - 3 ) ) )
260
261#define FT_NEXT_LONG_LE( buffer )                                  \
262          ( (long)( buffer += 4, FT_PEEK_LONG_LE( buffer - 4 ) ) )
263
264#define FT_NEXT_ULONG_LE( buffer )                                           \
265          ( (unsigned long)( buffer += 4, FT_PEEK_ULONG_LE( buffer - 4 ) ) )
266
267
268  /*************************************************************************/
269  /*                                                                       */
270  /* Each GET_xxxx() macro uses an implicit `stream' variable.             */
271  /*                                                                       */
272#if 0
273#define FT_GET_MACRO( type )    FT_NEXT_ ## type ( stream->cursor )
274
275#define FT_GET_CHAR()       FT_GET_MACRO( CHAR )
276#define FT_GET_BYTE()       FT_GET_MACRO( BYTE )
277#define FT_GET_SHORT()      FT_GET_MACRO( SHORT )
278#define FT_GET_USHORT()     FT_GET_MACRO( USHORT )
279#define FT_GET_OFF3()       FT_GET_MACRO( OFF3 )
280#define FT_GET_UOFF3()      FT_GET_MACRO( UOFF3 )
281#define FT_GET_LONG()       FT_GET_MACRO( LONG )
282#define FT_GET_ULONG()      FT_GET_MACRO( ULONG )
283#define FT_GET_TAG4()       FT_GET_MACRO( ULONG )
284
285#define FT_GET_SHORT_LE()   FT_GET_MACRO( SHORT_LE )
286#define FT_GET_USHORT_LE()  FT_GET_MACRO( USHORT_LE )
287#define FT_GET_LONG_LE()    FT_GET_MACRO( LONG_LE )
288#define FT_GET_ULONG_LE()   FT_GET_MACRO( ULONG_LE )
289
290#else
291#define FT_GET_MACRO( func, type )        ( (type)func( stream ) )
292
293#define FT_GET_CHAR()       FT_GET_MACRO( FT_Stream_GetChar, FT_Char )
294#define FT_GET_BYTE()       FT_GET_MACRO( FT_Stream_GetChar, FT_Byte )
295#define FT_GET_SHORT()      FT_GET_MACRO( FT_Stream_GetUShort, FT_Short )
296#define FT_GET_USHORT()     FT_GET_MACRO( FT_Stream_GetUShort, FT_UShort )
297#define FT_GET_OFF3()       FT_GET_MACRO( FT_Stream_GetUOffset, FT_Long )
298#define FT_GET_UOFF3()      FT_GET_MACRO( FT_Stream_GetUOffset, FT_ULong )
299#define FT_GET_LONG()       FT_GET_MACRO( FT_Stream_GetULong, FT_Long )
300#define FT_GET_ULONG()      FT_GET_MACRO( FT_Stream_GetULong, FT_ULong )
301#define FT_GET_TAG4()       FT_GET_MACRO( FT_Stream_GetULong, FT_ULong )
302
303#define FT_GET_SHORT_LE()   FT_GET_MACRO( FT_Stream_GetUShortLE, FT_Short )
304#define FT_GET_USHORT_LE()  FT_GET_MACRO( FT_Stream_GetUShortLE, FT_UShort )
305#define FT_GET_LONG_LE()    FT_GET_MACRO( FT_Stream_GetULongLE, FT_Long )
306#define FT_GET_ULONG_LE()   FT_GET_MACRO( FT_Stream_GetULongLE, FT_ULong )
307#endif
308
309#define FT_READ_MACRO( func, type, var )        \
310          ( var = (type)func( stream, &error ), \
311            error != FT_Err_Ok )
312
313#define FT_READ_BYTE( var )       FT_READ_MACRO( FT_Stream_ReadChar, FT_Byte, var )
314#define FT_READ_CHAR( var )       FT_READ_MACRO( FT_Stream_ReadChar, FT_Char, var )
315#define FT_READ_SHORT( var )      FT_READ_MACRO( FT_Stream_ReadUShort, FT_Short, var )
316#define FT_READ_USHORT( var )     FT_READ_MACRO( FT_Stream_ReadUShort, FT_UShort, var )
317#define FT_READ_OFF3( var )       FT_READ_MACRO( FT_Stream_ReadUOffset, FT_Long, var )
318#define FT_READ_UOFF3( var )      FT_READ_MACRO( FT_Stream_ReadUOffset, FT_ULong, var )
319#define FT_READ_LONG( var )       FT_READ_MACRO( FT_Stream_ReadULong, FT_Long, var )
320#define FT_READ_ULONG( var )      FT_READ_MACRO( FT_Stream_ReadULong, FT_ULong, var )
321
322#define FT_READ_SHORT_LE( var )   FT_READ_MACRO( FT_Stream_ReadUShortLE, FT_Short, var )
323#define FT_READ_USHORT_LE( var )  FT_READ_MACRO( FT_Stream_ReadUShortLE, FT_UShort, var )
324#define FT_READ_LONG_LE( var )    FT_READ_MACRO( FT_Stream_ReadULongLE, FT_Long, var )
325#define FT_READ_ULONG_LE( var )   FT_READ_MACRO( FT_Stream_ReadULongLE, FT_ULong, var )
326
327
328#ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM
329
330  /* initialize a stream for reading a regular system stream */
331  FT_BASE( FT_Error )
332  FT_Stream_Open( FT_Stream    stream,
333                  const char*  filepathname );
334
335#endif /* FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM */
336
337
338  /* create a new (input) stream from an FT_Open_Args structure */
339  FT_BASE( FT_Error )
340  FT_Stream_New( FT_Library           library,
341                 const FT_Open_Args*  args,
342                 FT_Stream           *astream );
343
344  /* free a stream */
345  FT_BASE( void )
346  FT_Stream_Free( FT_Stream  stream,
347                  FT_Int     external );
348
349  /* initialize a stream for reading in-memory data */
350  FT_BASE( void )
351  FT_Stream_OpenMemory( FT_Stream       stream,
352                        const FT_Byte*  base,
353                        FT_ULong        size );
354
355  /* close a stream (does not destroy the stream structure) */
356  FT_BASE( void )
357  FT_Stream_Close( FT_Stream  stream );
358
359
360  /* seek within a stream. position is relative to start of stream */
361  FT_BASE( FT_Error )
362  FT_Stream_Seek( FT_Stream  stream,
363                  FT_ULong   pos );
364
365  /* skip bytes in a stream */
366  FT_BASE( FT_Error )
367  FT_Stream_Skip( FT_Stream  stream,
368                  FT_Long    distance );
369
370  /* return current stream position */
371  FT_BASE( FT_Long )
372  FT_Stream_Pos( FT_Stream  stream );
373
374  /* read bytes from a stream into a user-allocated buffer, returns an */
375  /* error if not all bytes could be read.                             */
376  FT_BASE( FT_Error )
377  FT_Stream_Read( FT_Stream  stream,
378                  FT_Byte*   buffer,
379                  FT_ULong   count );
380
381  /* read bytes from a stream at a given position */
382  FT_BASE( FT_Error )
383  FT_Stream_ReadAt( FT_Stream  stream,
384                    FT_ULong   pos,
385                    FT_Byte*   buffer,
386                    FT_ULong   count );
387
388  /* try to read bytes at the end of a stream; return number of bytes */
389  /* really available                                                 */
390  FT_BASE( FT_ULong )
391  FT_Stream_TryRead( FT_Stream  stream,
392                     FT_Byte*   buffer,
393                     FT_ULong   count );
394
395  /* Enter a frame of `count' consecutive bytes in a stream.  Returns an */
396  /* error if the frame could not be read/accessed.  The caller can use  */
397  /* the FT_Stream_Get_XXX functions to retrieve frame data without      */
398  /* error checks.                                                       */
399  /*                                                                     */
400  /* You must _always_ call FT_Stream_ExitFrame() once you have entered  */
401  /* a stream frame!                                                     */
402  /*                                                                     */
403  FT_BASE( FT_Error )
404  FT_Stream_EnterFrame( FT_Stream  stream,
405                        FT_ULong   count );
406
407  /* exit a stream frame */
408  FT_BASE( void )
409  FT_Stream_ExitFrame( FT_Stream  stream );
410
411  /* Extract a stream frame.  If the stream is disk-based, a heap block */
412  /* is allocated and the frame bytes are read into it.  If the stream  */
413  /* is memory-based, this function simply set a pointer to the data.   */
414  /*                                                                    */
415  /* Useful to optimize access to memory-based streams transparently.   */
416  /*                                                                    */
417  /* All extracted frames must be `freed' with a call to the function   */
418  /* FT_Stream_ReleaseFrame().                                          */
419  /*                                                                    */
420  FT_BASE( FT_Error )
421  FT_Stream_ExtractFrame( FT_Stream  stream,
422                          FT_ULong   count,
423                          FT_Byte**  pbytes );
424
425  /* release an extract frame (see FT_Stream_ExtractFrame) */
426  FT_BASE( void )
427  FT_Stream_ReleaseFrame( FT_Stream  stream,
428                          FT_Byte**  pbytes );
429
430  /* read a byte from an entered frame */
431  FT_BASE( FT_Char )
432  FT_Stream_GetChar( FT_Stream  stream );
433
434  /* read a 16-bit big-endian unsigned integer from an entered frame */
435  FT_BASE( FT_UShort )
436  FT_Stream_GetUShort( FT_Stream  stream );
437
438  /* read a 24-bit big-endian unsigned integer from an entered frame */
439  FT_BASE( FT_ULong )
440  FT_Stream_GetUOffset( FT_Stream  stream );
441
442  /* read a 32-bit big-endian unsigned integer from an entered frame */
443  FT_BASE( FT_ULong )
444  FT_Stream_GetULong( FT_Stream  stream );
445
446  /* read a 16-bit little-endian unsigned integer from an entered frame */
447  FT_BASE( FT_UShort )
448  FT_Stream_GetUShortLE( FT_Stream  stream );
449
450  /* read a 32-bit little-endian unsigned integer from an entered frame */
451  FT_BASE( FT_ULong )
452  FT_Stream_GetULongLE( FT_Stream  stream );
453
454
455  /* read a byte from a stream */
456  FT_BASE( FT_Char )
457  FT_Stream_ReadChar( FT_Stream  stream,
458                      FT_Error*  error );
459
460  /* read a 16-bit big-endian unsigned integer from a stream */
461  FT_BASE( FT_UShort )
462  FT_Stream_ReadUShort( FT_Stream  stream,
463                        FT_Error*  error );
464
465  /* read a 24-bit big-endian unsigned integer from a stream */
466  FT_BASE( FT_ULong )
467  FT_Stream_ReadUOffset( FT_Stream  stream,
468                         FT_Error*  error );
469
470  /* read a 32-bit big-endian integer from a stream */
471  FT_BASE( FT_ULong )
472  FT_Stream_ReadULong( FT_Stream  stream,
473                       FT_Error*  error );
474
475  /* read a 16-bit little-endian unsigned integer from a stream */
476  FT_BASE( FT_UShort )
477  FT_Stream_ReadUShortLE( FT_Stream  stream,
478                          FT_Error*  error );
479
480  /* read a 32-bit little-endian unsigned integer from a stream */
481  FT_BASE( FT_ULong )
482  FT_Stream_ReadULongLE( FT_Stream  stream,
483                         FT_Error*  error );
484
485  /* Read a structure from a stream.  The structure must be described */
486  /* by an array of FT_Frame_Field records.                           */
487  FT_BASE( FT_Error )
488  FT_Stream_ReadFields( FT_Stream              stream,
489                        const FT_Frame_Field*  fields,
490                        void*                  structure );
491
492
493#define FT_STREAM_POS()           \
494          FT_Stream_Pos( stream )
495
496#define FT_STREAM_SEEK( position )                           \
497          FT_SET_ERROR( FT_Stream_Seek( stream, position ) )
498
499#define FT_STREAM_SKIP( distance )                           \
500          FT_SET_ERROR( FT_Stream_Skip( stream, distance ) )
501
502#define FT_STREAM_READ( buffer, count )                   \
503          FT_SET_ERROR( FT_Stream_Read( stream,           \
504                                        (FT_Byte*)buffer, \
505                                        count ) )
506
507#define FT_STREAM_READ_AT( position, buffer, count )         \
508          FT_SET_ERROR( FT_Stream_ReadAt( stream,            \
509                                           position,         \
510                                           (FT_Byte*)buffer, \
511                                           count ) )
512
513#define FT_STREAM_READ_FIELDS( fields, object )                          \
514          FT_SET_ERROR( FT_Stream_ReadFields( stream, fields, object ) )
515
516
517#define FT_FRAME_ENTER( size )                                       \
518          FT_SET_ERROR(                                              \
519            FT_DEBUG_INNER( FT_Stream_EnterFrame( stream, size ) ) )
520
521#define FT_FRAME_EXIT()                 \
522          FT_DEBUG_INNER( FT_Stream_ExitFrame( stream ) )
523
524#define FT_FRAME_EXTRACT( size, bytes )                                       \
525          FT_SET_ERROR(                                                       \
526            FT_DEBUG_INNER( FT_Stream_ExtractFrame( stream, size,             \
527                                                    (FT_Byte**)&(bytes) ) ) )
528
529#define FT_FRAME_RELEASE( bytes )                                         \
530          FT_DEBUG_INNER( FT_Stream_ReleaseFrame( stream,                 \
531                                                  (FT_Byte**)&(bytes) ) )
532
533
534FT_END_HEADER
535
536#endif /* __FTSTREAM_H__ */
537
538
539/* END */