ref: dda05ee1dadec0350a3ef5a3ca93c93ceee9d1d0
dir: /src/base/ftstream.h/
#ifndef FTSTREAM_H
#define FTSTREAM_H
#include <ftobjs.h>
/*************************************************************************/
/* */
/* integer extraction macros - the `buffer' parameter must ALWAYS be of */
/* type `char*' or equivalent (1-byte elements). */
/* */
#define NEXT_Char(buffer) ((signed char)*buffer++)
#define NEXT_Byte(buffer) ((unsigned char)*buffer++)
#define NEXT_Short(buffer) ( buffer += 2, \
( (short)((signed char)buffer[-2] << 8) | \
(unsigned char)buffer[-1] ) )
#define NEXT_UShort(buffer) ((unsigned short)NEXT_Short(buffer))
#define NEXT_Offset(buffer) ( buffer += 3, \
( ((long)(signed char)buffer[-3] << 16) | \
((long)(unsigned char)buffer[-2] << 8) | \
(long)(unsigned char)buffer[-1] ) )
#define NEXT_UOffset(buffer) ((unsigned long)NEXT_Offset(buffer))
#define NEXT_Long(buffer) ( buffer += 4, \
( ((long)(signed char)buffer[-4] << 24) | \
((long)(unsigned char)buffer[-3] << 16) | \
((long)(unsigned char)buffer[-2] << 8) | \
(long)(unsigned char)buffer[-1] ) )
#define NEXT_ULong(buffer) ((unsigned long)NEXT_Long(buffer))
/*************************************************************************/
/* */
/* Each GET_xxxx() macro uses an implicit `stream' variable. */
/* */
#define FT_GET_MACRO( func, type ) ( (type)func(stream) )
#define GET_Char() FT_GET_MACRO( FT_Get_Char, FT_Char )
#define GET_Byte() FT_GET_MACRO( FT_Get_Char, FT_Byte )
#define GET_Short() FT_GET_MACRO( FT_Get_Short, FT_Short )
#define GET_UShort() FT_GET_MACRO( FT_Get_Short, FT_UShort )
#define GET_Offset() FT_GET_MACRO( FT_Get_Offset, FT_Long )
#define GET_UOffset() FT_GET_MACRO( FT_Get_Offset, FT_ULong )
#define GET_Long() FT_GET_MACRO( FT_Get_Long, FT_Long )
#define GET_ULong() FT_GET_MACRO( FT_Get_Long, FT_ULong )
#define GET_Tag4() FT_GET_MACRO( FT_Get_Long, FT_ULong )
#define FT_READ_MACRO( func, type, var ) \
( var = (type)func( stream, &error ), \
error != FT_Err_Ok )
#define READ_Byte( var ) FT_READ_MACRO( FT_Read_Char, FT_Byte, var )
#define READ_Char( var ) FT_READ_MACRO( FT_Read_Char, FT_Char, var )
#define READ_Short( var ) FT_READ_MACRO( FT_Read_Short, FT_Short, var )
#define READ_UShort( var ) FT_READ_MACRO( FT_Read_Short, FT_UShort, var )
#define READ_Offset( var ) FT_READ_MACRO( FT_Read_Offset, FT_Long, var )
#define READ_UOffset( var ) FT_READ_MACRO( FT_Read_Offset, FT_ULong, var )
#define READ_Long( var ) FT_READ_MACRO( FT_Read_Long, FT_Long, var )
#define READ_ULong( var ) FT_READ_MACRO( FT_Read_Long, FT_ULong, var )
BASE_DEF
void FT_New_Memory_Stream( FT_Library library,
void* base,
unsigned long size,
FT_Stream stream );
BASE_DEF
FT_Error FT_Seek_Stream( FT_Stream stream,
FT_ULong pos );
BASE_DEF
FT_Error FT_Skip_Stream( FT_Stream stream,
FT_Long distance );
BASE_DEF
FT_Long FT_Stream_Pos( FT_Stream stream );
BASE_DEF
FT_Error FT_Read_Stream( FT_Stream stream,
void* buffer,
FT_ULong count );
BASE_DEF
FT_Error FT_Read_Stream_At( FT_Stream stream,
FT_ULong pos,
void* buffer,
FT_ULong count );
BASE_DEF
FT_Error FT_Access_Frame( FT_Stream stream,
FT_ULong count );
BASE_DEF
void FT_Forget_Frame( FT_Stream stream );
BASE_DEF
FT_Char FT_Get_Char( FT_Stream stream );
BASE_DEF
FT_Short FT_Get_Short( FT_Stream stream );
BASE_DEF
FT_Long FT_Get_Offset( FT_Stream stream );
BASE_DEF
FT_Long FT_Get_Long( FT_Stream stream );
BASE_DEF
FT_Char FT_Read_Char( FT_Stream stream,
FT_Error* error );
BASE_DEF
FT_Short FT_Read_Short( FT_Stream stream,
FT_Error* error );
BASE_DEF
FT_Long FT_Read_Offset( FT_Stream stream,
FT_Error* error );
BASE_DEF
FT_Long FT_Read_Long( FT_Stream stream,
FT_Error* error );
#define USE_Stream( resource, stream ) \
FT_SET_ERROR( FT_Open_Stream( resource, stream ) )
#define DONE_Stream( stream ) \
FT_Done_Stream( stream )
#define ACCESS_Frame( size ) \
FT_SET_ERROR( FT_Access_Frame( stream, size ) )
#define ACCESS_Compressed_Frame( size ) \
FT_SET_ERROR( FT_Access_Compressed_Frame( stream, size ) )
#define FORGET_Frame() \
FT_Forget_Frame( stream )
#define FILE_Seek( position ) \
FT_SET_ERROR( FT_Seek_Stream( stream, position ) )
#define FILE_Skip( distance ) \
FT_SET_ERROR( FT_Skip_Stream( stream, distance ) )
#define FILE_Pos() \
FT_Stream_Pos( stream )
#define FILE_Read( buffer, count ) \
FT_SET_ERROR( FT_Read_Stream( stream, \
(FT_Char*)buffer, \
count ) )
#define FILE_Read_At( position, buffer, count ) \
FT_SET_ERROR( FT_Read_Stream_At( stream, \
position, \
(FT_Char*)buffer, \
count ) )
#endif /* FTIO_H */