kc3-lang/freetype/src/base/ftsysio.c

Branch : - branch - master v2.13 - tag -

• Show log

  Commit

• Author : David Turner
  Date : 2002-04-25 21:42:59
  Hash : e7880499
  Message : adding experimental (alpha) exception support code + system code

• src/base/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) );
    }