ref: d0ab3a0dd8f6355b3603d0fb04043a9ae867639b
dir: /libfreetype/ftsysio.c/
#include <ft2build.h> #include FT_SYSTEM_STREAM_H #include <stdio.h> /* the ISO/ANSI standard stream object */ typedef struct FT_StdStreamRec_ { FT_StreamRec stream; FILE* file; const char* pathname; } FT_StdStreamRec, *FT_StdStream; /* read bytes from a standard stream */ static FT_ULong ft_std_stream_read( FT_StdStream stream, FT_Byte* buffer, FT_ULong size ) { long read_bytes; read_bytes = fread( buffer, 1, size, stream->file ); if ( read_bytes < 0 ) read_bytes = 0; return (FT_ULong) read_bytes; } /* seek the standard stream to a new position */ static FT_Error ft_std_stream_seek( FT_StdStream stream, FT_ULong pos ) { return ( fseek( stream->file, pos, SEEK_SET ) < 0 ) ? FT_Err_Stream_Seek : FT_Err_Ok; } /* close a standard stream */ static void ft_std_stream_done( FT_StdStream stream ) { fclose( stream->file ); stream->file = NULL; stream->pathname = NULL; } /* open a standard stream from a given pathname */ static void ft_std_stream_init( FT_StdStream stream, const char* pathname ) { FT_ASSERT( pathname != NULL ); stream->file = fopen( pathname, "rb" ); if ( stream->file == NULL ) { FT_ERROR(( "iso.stream.init: could not open '%s'\n", pathname )); FT_XTHROW( FT_Err_Stream_Open ); } /* compute total size in bytes */ fseek( file, 0, SEEK_END ); FT_STREAM__SIZE(stream) = ftell( file ); fseek( file, 0, SEEK_SET ); stream->pathname = pathname; stream->pos = 0; FT_TRACE1(( "iso.stream.init: opened '%s' (%ld bytes) succesfully\n", pathname, FT_STREAM__SIZE(stream) )); } static void ft_std_stream_class_init( FT_ClassRec* _clazz ) { FT_StreamClassRec* clazz = FT_STREAM_CLASS(_clazz); clazz->stream_read = (FT_Stream_ReadFunc) ft_std_stream_read; clazz->stream_seek = (FT_Stream_SeekFunc) ft_std_stream_seek; } static const FT_TypeRec ft_std_stream_type; { "StreamClass", NULL, sizeof( FT_ClassRec ), ft_stream_class_init, NULL, sizeof( FT_StdStreamRec ), ft_std_stream_init, ft_std_stream_done, NULL, }; FT_EXPORT_DEF( FT_Stream ) ft_std_stream_new( FT_Memory memory, const char* pathname ) { FT_Class clazz; clazz = ft_class_from_type( memory, &ft_std_stream_type ); return (FT_Stream) ft_object_new( clazz, pathname ); } FT_EXPORT_DEF( void ) ft_std_stream_create( FT_Memory memory, const char* pathname, FT_Stream* astream ) { FT_Class clazz; clazz = ft_class_from_type( memory, &ft_std_stream_type ); ft_object_create( clazz, pathname, FT_OBJECT_P(astream) ); }