lib/3rdparty/freetype/include/internal/ftstream.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftstream.h                                                             */
   4 /*                                                                         */
   5 /*    Stream handling (specification).                                     */
   6 /*                                                                         */
   7 /*  Copyright 1996-2002, 2004-2006, 2011, 2013 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
  28 FT_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
 158 #define FT_INT16( x )   ( (FT_Int16)(x)  )
 159 #define FT_UINT16( x )  ( (FT_UInt16)(x) )
 160 #define FT_INT32( x )   ( (FT_Int32)(x)  )
 161 #define FT_UINT32( x )  ( (FT_UInt32)(x) )
 162
 163
 164 #define FT_BYTE_U16( p, i, s )  ( FT_UINT16( FT_BYTE_( p, i ) ) << (s) )
 165 #define FT_BYTE_U32( p, i, s )  ( FT_UINT32( FT_BYTE_( p, i ) ) << (s) )
 166
 167
 168 #define FT_PEEK_SHORT( p )  FT_INT16( FT_BYTE_U16( p, 0, 8) | \
 169                                       FT_BYTE_U16( p, 1, 0) )
 170
 171 #define FT_PEEK_USHORT( p )  FT_UINT16( FT_BYTE_U16( p, 0, 8 ) | \
 172                                         FT_BYTE_U16( p, 1, 0 ) )
 173
 174 #define FT_PEEK_LONG( p )  FT_INT32( FT_BYTE_U32( p, 0, 24 ) | \
 175                                      FT_BYTE_U32( p, 1, 16 ) | \
 176                                      FT_BYTE_U32( p, 2,  8 ) | \
 177                                      FT_BYTE_U32( p, 3,  0 ) )
 178
 179 #define FT_PEEK_ULONG( p )  FT_UINT32( FT_BYTE_U32( p, 0, 24 ) | \
 180                                        FT_BYTE_U32( p, 1, 16 ) | \
 181                                        FT_BYTE_U32( p, 2,  8 ) | \
 182                                        FT_BYTE_U32( p, 3,  0 ) )
 183
 184 #define FT_PEEK_OFF3( p )  FT_INT32( FT_BYTE_U32( p, 0, 16 ) | \
 185                                      FT_BYTE_U32( p, 1,  8 ) | \
 186                                      FT_BYTE_U32( p, 2,  0 ) )
 187
 188 #define FT_PEEK_UOFF3( p )  FT_UINT32( FT_BYTE_U32( p, 0, 16 ) | \
 189                                        FT_BYTE_U32( p, 1,  8 ) | \
 190                                        FT_BYTE_U32( p, 2,  0 ) )
 191
 192 #define FT_PEEK_SHORT_LE( p )  FT_INT16( FT_BYTE_U16( p, 1, 8 ) | \
 193                                          FT_BYTE_U16( p, 0, 0 ) )
 194
 195 #define FT_PEEK_USHORT_LE( p )  FT_UINT16( FT_BYTE_U16( p, 1, 8 ) |  \
 196                                            FT_BYTE_U16( p, 0, 0 ) )
 197
 198 #define FT_PEEK_LONG_LE( p )  FT_INT32( FT_BYTE_U32( p, 3, 24 ) | \
 199                                         FT_BYTE_U32( p, 2, 16 ) | \
 200                                         FT_BYTE_U32( p, 1,  8 ) | \
 201                                         FT_BYTE_U32( p, 0,  0 ) )
 202
 203 #define FT_PEEK_ULONG_LE( p )  FT_UINT32( FT_BYTE_U32( p, 3, 24 ) | \
 204                                           FT_BYTE_U32( p, 2, 16 ) | \
 205                                           FT_BYTE_U32( p, 1,  8 ) | \
 206                                           FT_BYTE_U32( p, 0,  0 ) )
 207
 208 #define FT_PEEK_OFF3_LE( p )  FT_INT32( FT_BYTE_U32( p, 2, 16 ) | \
 209                                         FT_BYTE_U32( p, 1,  8 ) | \
 210                                         FT_BYTE_U32( p, 0,  0 ) )
 211
 212 #define FT_PEEK_UOFF3_LE( p )  FT_UINT32( FT_BYTE_U32( p, 2, 16 ) | \
 213                                           FT_BYTE_U32( p, 1,  8 ) | \
 214                                           FT_BYTE_U32( p, 0,  0 ) )
 215
 216
 217 #define FT_NEXT_CHAR( buffer )       \
 218           ( (signed char)*buffer++ )
 219
 220 #define FT_NEXT_BYTE( buffer )         \
 221           ( (unsigned char)*buffer++ )
 222
 223 #define FT_NEXT_SHORT( buffer )                                   \
 224           ( (short)( buffer += 2, FT_PEEK_SHORT( buffer - 2 ) ) )
 225
 226 #define FT_NEXT_USHORT( buffer )                                            \
 227           ( (unsigned short)( buffer += 2, FT_PEEK_USHORT( buffer - 2 ) ) )
 228
 229 #define FT_NEXT_OFF3( buffer )                                  \
 230           ( (long)( buffer += 3, FT_PEEK_OFF3( buffer - 3 ) ) )
 231
 232 #define FT_NEXT_UOFF3( buffer )                                           \
 233           ( (unsigned long)( buffer += 3, FT_PEEK_UOFF3( buffer - 3 ) ) )
 234
 235 #define FT_NEXT_LONG( buffer )                                  \
 236           ( (long)( buffer += 4, FT_PEEK_LONG( buffer - 4 ) ) )
 237
 238 #define FT_NEXT_ULONG( buffer )                                           \
 239           ( (unsigned long)( buffer += 4, FT_PEEK_ULONG( buffer - 4 ) ) )
 240
 241
 242 #define FT_NEXT_SHORT_LE( buffer )                                   \
 243           ( (short)( buffer += 2, FT_PEEK_SHORT_LE( buffer - 2 ) ) )
 244
 245 #define FT_NEXT_USHORT_LE( buffer )                                            \
 246           ( (unsigned short)( buffer += 2, FT_PEEK_USHORT_LE( buffer - 2 ) ) )
 247
 248 #define FT_NEXT_OFF3_LE( buffer )                                  \
 249           ( (long)( buffer += 3, FT_PEEK_OFF3_LE( buffer - 3 ) ) )
 250
 251 #define FT_NEXT_UOFF3_LE( buffer )                                           \
 252           ( (unsigned long)( buffer += 3, FT_PEEK_UOFF3_LE( buffer - 3 ) ) )
 253
 254 #define FT_NEXT_LONG_LE( buffer )                                  \
 255           ( (long)( buffer += 4, FT_PEEK_LONG_LE( buffer - 4 ) ) )
 256
 257 #define FT_NEXT_ULONG_LE( buffer )                                           \
 258           ( (unsigned long)( buffer += 4, FT_PEEK_ULONG_LE( buffer - 4 ) ) )
 259
 260
 261   /*************************************************************************/
 262   /*                                                                       */
 263   /* Each GET_xxxx() macro uses an implicit `stream' variable.             */
 264   /*                                                                       */
 265 #if 0
 266 #define FT_GET_MACRO( type )    FT_NEXT_ ## type ( stream->cursor )
 267
 268 #define FT_GET_CHAR()       FT_GET_MACRO( CHAR )
 269 #define FT_GET_BYTE()       FT_GET_MACRO( BYTE )
 270 #define FT_GET_SHORT()      FT_GET_MACRO( SHORT )
 271 #define FT_GET_USHORT()     FT_GET_MACRO( USHORT )
 272 #define FT_GET_OFF3()       FT_GET_MACRO( OFF3 )
 273 #define FT_GET_UOFF3()      FT_GET_MACRO( UOFF3 )
 274 #define FT_GET_LONG()       FT_GET_MACRO( LONG )
 275 #define FT_GET_ULONG()      FT_GET_MACRO( ULONG )
 276 #define FT_GET_TAG4()       FT_GET_MACRO( ULONG )
 277
 278 #define FT_GET_SHORT_LE()   FT_GET_MACRO( SHORT_LE )
 279 #define FT_GET_USHORT_LE()  FT_GET_MACRO( USHORT_LE )
 280 #define FT_GET_LONG_LE()    FT_GET_MACRO( LONG_LE )
 281 #define FT_GET_ULONG_LE()   FT_GET_MACRO( ULONG_LE )
 282
 283 #else
 284 #define FT_GET_MACRO( func, type )        ( (type)func( stream ) )
 285
 286 #define FT_GET_CHAR()       FT_GET_MACRO( FT_Stream_GetChar, FT_Char )
 287 #define FT_GET_BYTE()       FT_GET_MACRO( FT_Stream_GetChar, FT_Byte )
 288 #define FT_GET_SHORT()      FT_GET_MACRO( FT_Stream_GetUShort, FT_Short )
 289 #define FT_GET_USHORT()     FT_GET_MACRO( FT_Stream_GetUShort, FT_UShort )
 290 #define FT_GET_OFF3()       FT_GET_MACRO( FT_Stream_GetUOffset, FT_Long )
 291 #define FT_GET_UOFF3()      FT_GET_MACRO( FT_Stream_GetUOffset, FT_ULong )
 292 #define FT_GET_LONG()       FT_GET_MACRO( FT_Stream_GetULong, FT_Long )
 293 #define FT_GET_ULONG()      FT_GET_MACRO( FT_Stream_GetULong, FT_ULong )
 294 #define FT_GET_TAG4()       FT_GET_MACRO( FT_Stream_GetULong, FT_ULong )
 295
 296 #define FT_GET_SHORT_LE()   FT_GET_MACRO( FT_Stream_GetUShortLE, FT_Short )
 297 #define FT_GET_USHORT_LE()  FT_GET_MACRO( FT_Stream_GetUShortLE, FT_UShort )
 298 #define FT_GET_LONG_LE()    FT_GET_MACRO( FT_Stream_GetULongLE, FT_Long )
 299 #define FT_GET_ULONG_LE()   FT_GET_MACRO( FT_Stream_GetULongLE, FT_ULong )
 300 #endif
 301
 302 #define FT_READ_MACRO( func, type, var )        \
 303           ( var = (type)func( stream, &error ), \
 304             error != FT_Err_Ok )
 305
 306 #define FT_READ_BYTE( var )       FT_READ_MACRO( FT_Stream_ReadChar, FT_Byte, var )
 307 #define FT_READ_CHAR( var )       FT_READ_MACRO( FT_Stream_ReadChar, FT_Char, var )
 308 #define FT_READ_SHORT( var )      FT_READ_MACRO( FT_Stream_ReadUShort, FT_Short, var )
 309 #define FT_READ_USHORT( var )     FT_READ_MACRO( FT_Stream_ReadUShort, FT_UShort, var )
 310 #define FT_READ_OFF3( var )       FT_READ_MACRO( FT_Stream_ReadUOffset, FT_Long, var )
 311 #define FT_READ_UOFF3( var )      FT_READ_MACRO( FT_Stream_ReadUOffset, FT_ULong, var )
 312 #define FT_READ_LONG( var )       FT_READ_MACRO( FT_Stream_ReadULong, FT_Long, var )
 313 #define FT_READ_ULONG( var )      FT_READ_MACRO( FT_Stream_ReadULong, FT_ULong, var )
 314
 315 #define FT_READ_SHORT_LE( var )   FT_READ_MACRO( FT_Stream_ReadUShortLE, FT_Short, var )
 316 #define FT_READ_USHORT_LE( var )  FT_READ_MACRO( FT_Stream_ReadUShortLE, FT_UShort, var )
 317 #define FT_READ_LONG_LE( var )    FT_READ_MACRO( FT_Stream_ReadULongLE, FT_Long, var )
 318 #define FT_READ_ULONG_LE( var )   FT_READ_MACRO( FT_Stream_ReadULongLE, FT_ULong, var )
 319
 320
 321 #ifndef FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM
 322
 323   /* initialize a stream for reading a regular system stream */
 324   FT_BASE( FT_Error )
 325   FT_Stream_Open( FT_Stream    stream,
 326                   const char*  filepathname );
 327
 328 #endif /* FT_CONFIG_OPTION_NO_DEFAULT_SYSTEM */
 329
 330
 331   /* create a new (input) stream from an FT_Open_Args structure */
 332   FT_BASE( FT_Error )
 333   FT_Stream_New( FT_Library           library,
 334                  const FT_Open_Args*  args,
 335                  FT_Stream           *astream );
 336
 337   /* free a stream */
 338   FT_BASE( void )
 339   FT_Stream_Free( FT_Stream  stream,
 340                   FT_Int     external );
 341
 342   /* initialize a stream for reading in-memory data */
 343   FT_BASE( void )
 344   FT_Stream_OpenMemory( FT_Stream       stream,
 345                         const FT_Byte*  base,
 346                         FT_ULong        size );
 347
 348   /* close a stream (does not destroy the stream structure) */
 349   FT_BASE( void )
 350   FT_Stream_Close( FT_Stream  stream );
 351
 352
 353   /* seek within a stream. position is relative to start of stream */
 354   FT_BASE( FT_Error )
 355   FT_Stream_Seek( FT_Stream  stream,
 356                   FT_ULong   pos );
 357
 358   /* skip bytes in a stream */
 359   FT_BASE( FT_Error )
 360   FT_Stream_Skip( FT_Stream  stream,
 361                   FT_Long    distance );
 362
 363   /* return current stream position */
 364   FT_BASE( FT_Long )
 365   FT_Stream_Pos( FT_Stream  stream );
 366
 367   /* read bytes from a stream into a user-allocated buffer, returns an */
 368   /* error if not all bytes could be read.                             */
 369   FT_BASE( FT_Error )
 370   FT_Stream_Read( FT_Stream  stream,
 371                   FT_Byte*   buffer,
 372                   FT_ULong   count );
 373
 374   /* read bytes from a stream at a given position */
 375   FT_BASE( FT_Error )
 376   FT_Stream_ReadAt( FT_Stream  stream,
 377                     FT_ULong   pos,
 378                     FT_Byte*   buffer,
 379                     FT_ULong   count );
 380
 381   /* try to read bytes at the end of a stream; return number of bytes */
 382   /* really available                                                 */
 383   FT_BASE( FT_ULong )
 384   FT_Stream_TryRead( FT_Stream  stream,
 385                      FT_Byte*   buffer,
 386                      FT_ULong   count );
 387
 388   /* Enter a frame of `count' consecutive bytes in a stream.  Returns an */
 389   /* error if the frame could not be read/accessed.  The caller can use  */
 390   /* the FT_Stream_Get_XXX functions to retrieve frame data without      */
 391   /* error checks.                                                       */
 392   /*                                                                     */
 393   /* You must _always_ call FT_Stream_ExitFrame() once you have entered  */
 394   /* a stream frame!                                                     */
 395   /*                                                                     */
 396   FT_BASE( FT_Error )
 397   FT_Stream_EnterFrame( FT_Stream  stream,
 398                         FT_ULong   count );
 399
 400   /* exit a stream frame */
 401   FT_BASE( void )
 402   FT_Stream_ExitFrame( FT_Stream  stream );
 403
 404   /* Extract a stream frame.  If the stream is disk-based, a heap block */
 405   /* is allocated and the frame bytes are read into it.  If the stream  */
 406   /* is memory-based, this function simply set a pointer to the data.   */
 407   /*                                                                    */
 408   /* Useful to optimize access to memory-based streams transparently.   */
 409   /*                                                                    */
 410   /* All extracted frames must be `freed' with a call to the function   */
 411   /* FT_Stream_ReleaseFrame().                                          */
 412   /*                                                                    */
 413   FT_BASE( FT_Error )
 414   FT_Stream_ExtractFrame( FT_Stream  stream,
 415                           FT_ULong   count,
 416                           FT_Byte**  pbytes );
 417
 418   /* release an extract frame (see FT_Stream_ExtractFrame) */
 419   FT_BASE( void )
 420   FT_Stream_ReleaseFrame( FT_Stream  stream,
 421                           FT_Byte**  pbytes );
 422
 423   /* read a byte from an entered frame */
 424   FT_BASE( FT_Char )
 425   FT_Stream_GetChar( FT_Stream  stream );
 426
 427   /* read a 16-bit big-endian unsigned integer from an entered frame */
 428   FT_BASE( FT_UShort )
 429   FT_Stream_GetUShort( FT_Stream  stream );
 430
 431   /* read a 24-bit big-endian unsigned integer from an entered frame */
 432   FT_BASE( FT_ULong )
 433   FT_Stream_GetUOffset( FT_Stream  stream );
 434
 435   /* read a 32-bit big-endian unsigned integer from an entered frame */
 436   FT_BASE( FT_ULong )
 437   FT_Stream_GetULong( FT_Stream  stream );
 438
 439   /* read a 16-bit little-endian unsigned integer from an entered frame */
 440   FT_BASE( FT_UShort )
 441   FT_Stream_GetUShortLE( FT_Stream  stream );
 442
 443   /* read a 32-bit little-endian unsigned integer from an entered frame */
 444   FT_BASE( FT_ULong )
 445   FT_Stream_GetULongLE( FT_Stream  stream );
 446
 447
 448   /* read a byte from a stream */
 449   FT_BASE( FT_Char )
 450   FT_Stream_ReadChar( FT_Stream  stream,
 451                       FT_Error*  error );
 452
 453   /* read a 16-bit big-endian unsigned integer from a stream */
 454   FT_BASE( FT_UShort )
 455   FT_Stream_ReadUShort( FT_Stream  stream,
 456                         FT_Error*  error );
 457
 458   /* read a 24-bit big-endian unsigned integer from a stream */
 459   FT_BASE( FT_ULong )
 460   FT_Stream_ReadUOffset( FT_Stream  stream,
 461                          FT_Error*  error );
 462
 463   /* read a 32-bit big-endian integer from a stream */
 464   FT_BASE( FT_ULong )
 465   FT_Stream_ReadULong( FT_Stream  stream,
 466                        FT_Error*  error );
 467
 468   /* read a 16-bit little-endian unsigned integer from a stream */
 469   FT_BASE( FT_UShort )
 470   FT_Stream_ReadUShortLE( FT_Stream  stream,
 471                           FT_Error*  error );
 472
 473   /* read a 32-bit little-endian unsigned integer from a stream */
 474   FT_BASE( FT_ULong )
 475   FT_Stream_ReadULongLE( FT_Stream  stream,
 476                          FT_Error*  error );
 477
 478   /* Read a structure from a stream.  The structure must be described */
 479   /* by an array of FT_Frame_Field records.                           */
 480   FT_BASE( FT_Error )
 481   FT_Stream_ReadFields( FT_Stream              stream,
 482                         const FT_Frame_Field*  fields,
 483                         void*                  structure );
 484
 485
 486 #define FT_STREAM_POS()           \
 487           FT_Stream_Pos( stream )
 488
 489 #define FT_STREAM_SEEK( position )                               \
 490           FT_SET_ERROR( FT_Stream_Seek( stream,                  \
 491                                         (FT_ULong)(position) ) )
 492
 493 #define FT_STREAM_SKIP( distance )                              \
 494           FT_SET_ERROR( FT_Stream_Skip( stream,                 \
 495                                         (FT_Long)(distance) ) )
 496
 497 #define FT_STREAM_READ( buffer, count )                       \
 498           FT_SET_ERROR( FT_Stream_Read( stream,               \
 499                                         (FT_Byte*)(buffer),   \
 500                                         (FT_ULong)(count) ) )
 501
 502 #define FT_STREAM_READ_AT( position, buffer, count )            \
 503           FT_SET_ERROR( FT_Stream_ReadAt( stream,               \
 504                                           (FT_ULong)(position), \
 505                                           (FT_Byte*)buffer,     \
 506                                           (FT_ULong)(count) ) )
 507
 508 #define FT_STREAM_READ_FIELDS( fields, object )                          \
 509           FT_SET_ERROR( FT_Stream_ReadFields( stream, fields, object ) )
 510
 511
 512 #define FT_FRAME_ENTER( size )                                           \
 513           FT_SET_ERROR(                                                  \
 514             FT_DEBUG_INNER( FT_Stream_EnterFrame( stream,                \
 515                                                   (FT_ULong)(size) ) ) )
 516
 517 #define FT_FRAME_EXIT()                                   \
 518           FT_DEBUG_INNER( FT_Stream_ExitFrame( stream ) )
 519
 520 #define FT_FRAME_EXTRACT( size, bytes )                                       \
 521           FT_SET_ERROR(                                                       \
 522             FT_DEBUG_INNER( FT_Stream_ExtractFrame( stream,                   \
 523                                                     (FT_ULong)(size),         \
 524                                                     (FT_Byte**)&(bytes) ) ) )
 525
 526 #define FT_FRAME_RELEASE( bytes )                                         \
 527           FT_DEBUG_INNER( FT_Stream_ReleaseFrame( stream,                 \
 528                                                   (FT_Byte**)&(bytes) ) )
 529
 530
 531 FT_END_HEADER
 532
 533 #endif /* __FTSTREAM_H__ */
 534
 535
 536 /* END */