--- a/misc/libfreetype/src/lzw/ftlzw.c Thu Jul 25 23:16:06 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,412 +0,0 @@
-/***************************************************************************/
-/* */
-/* ftlzw.c */
-/* */
-/* FreeType support for .Z compressed files. */
-/* */
-/* This optional component relies on NetBSD's zopen(). It should mainly */
-/* be used to parse compressed PCF fonts, as found with many X11 server */
-/* distributions. */
-/* */
-/* Copyright 2004, 2005, 2006, 2009, 2010 by */
-/* Albert Chin-A-Young. */
-/* */
-/* Based on code in src/gzip/ftgzip.c, Copyright 2004 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
-
-#include <ft2build.h>
-#include FT_INTERNAL_MEMORY_H
-#include FT_INTERNAL_STREAM_H
-#include FT_INTERNAL_DEBUG_H
-#include FT_LZW_H
-#include FT_CONFIG_STANDARD_LIBRARY_H
-
-
-#include FT_MODULE_ERRORS_H
-
-#undef __FTERRORS_H__
-
-#define FT_ERR_PREFIX LZW_Err_
-#define FT_ERR_BASE FT_Mod_Err_LZW
-
-#include FT_ERRORS_H
-
-
-#ifdef FT_CONFIG_OPTION_USE_LZW
-
-#ifdef FT_CONFIG_OPTION_PIC
-#error "lzw code does not support PIC yet"
-#endif
-
-#include "ftzopen.h"
-
-
-/***************************************************************************/
-/***************************************************************************/
-/***** *****/
-/***** M E M O R Y M A N A G E M E N T *****/
-/***** *****/
-/***************************************************************************/
-/***************************************************************************/
-
-/***************************************************************************/
-/***************************************************************************/
-/***** *****/
-/***** F I L E D E S C R I P T O R *****/
-/***** *****/
-/***************************************************************************/
-/***************************************************************************/
-
-#define FT_LZW_BUFFER_SIZE 4096
-
- typedef struct FT_LZWFileRec_
- {
- FT_Stream source; /* parent/source stream */
- FT_Stream stream; /* embedding stream */
- FT_Memory memory; /* memory allocator */
- FT_LzwStateRec lzw; /* lzw decompressor state */
-
- FT_Byte buffer[FT_LZW_BUFFER_SIZE]; /* output buffer */
- FT_ULong pos; /* position in output */
- FT_Byte* cursor;
- FT_Byte* limit;
-
- } FT_LZWFileRec, *FT_LZWFile;
-
-
- /* check and skip .Z header */
- static FT_Error
- ft_lzw_check_header( FT_Stream stream )
- {
- FT_Error error;
- FT_Byte head[2];
-
-
- if ( FT_STREAM_SEEK( 0 ) ||
- FT_STREAM_READ( head, 2 ) )
- goto Exit;
-
- /* head[0] && head[1] are the magic numbers */
- if ( head[0] != 0x1f ||
- head[1] != 0x9d )
- error = LZW_Err_Invalid_File_Format;
-
- Exit:
- return error;
- }
-
-
- static FT_Error
- ft_lzw_file_init( FT_LZWFile zip,
- FT_Stream stream,
- FT_Stream source )
- {
- FT_LzwState lzw = &zip->lzw;
- FT_Error error = LZW_Err_Ok;
-
-
- zip->stream = stream;
- zip->source = source;
- zip->memory = stream->memory;
-
- zip->limit = zip->buffer + FT_LZW_BUFFER_SIZE;
- zip->cursor = zip->limit;
- zip->pos = 0;
-
- /* check and skip .Z header */
- error = ft_lzw_check_header( source );
- if ( error )
- goto Exit;
-
- /* initialize internal lzw variable */
- ft_lzwstate_init( lzw, source );
-
- Exit:
- return error;
- }
-
-
- static void
- ft_lzw_file_done( FT_LZWFile zip )
- {
- /* clear the rest */
- ft_lzwstate_done( &zip->lzw );
-
- zip->memory = NULL;
- zip->source = NULL;
- zip->stream = NULL;
- }
-
-
- static FT_Error
- ft_lzw_file_reset( FT_LZWFile zip )
- {
- FT_Stream stream = zip->source;
- FT_Error error;
-
-
- if ( !FT_STREAM_SEEK( 0 ) )
- {
- ft_lzwstate_reset( &zip->lzw );
-
- zip->limit = zip->buffer + FT_LZW_BUFFER_SIZE;
- zip->cursor = zip->limit;
- zip->pos = 0;
- }
-
- return error;
- }
-
-
- static FT_Error
- ft_lzw_file_fill_output( FT_LZWFile zip )
- {
- FT_LzwState lzw = &zip->lzw;
- FT_ULong count;
- FT_Error error = LZW_Err_Ok;
-
-
- zip->cursor = zip->buffer;
-
- count = ft_lzwstate_io( lzw, zip->buffer, FT_LZW_BUFFER_SIZE );
-
- zip->limit = zip->cursor + count;
-
- if ( count == 0 )
- error = LZW_Err_Invalid_Stream_Operation;
-
- return error;
- }
-
-
- /* fill output buffer; `count' must be <= FT_LZW_BUFFER_SIZE */
- static FT_Error
- ft_lzw_file_skip_output( FT_LZWFile zip,
- FT_ULong count )
- {
- FT_Error error = LZW_Err_Ok;
-
-
- /* first, we skip what we can from the output buffer */
- {
- FT_ULong delta = (FT_ULong)( zip->limit - zip->cursor );
-
-
- if ( delta >= count )
- delta = count;
-
- zip->cursor += delta;
- zip->pos += delta;
-
- count -= delta;
- }
-
- /* next, we skip as many bytes remaining as possible */
- while ( count > 0 )
- {
- FT_ULong delta = FT_LZW_BUFFER_SIZE;
- FT_ULong numread;
-
-
- if ( delta > count )
- delta = count;
-
- numread = ft_lzwstate_io( &zip->lzw, NULL, delta );
- if ( numread < delta )
- {
- /* not enough bytes */
- error = LZW_Err_Invalid_Stream_Operation;
- break;
- }
-
- zip->pos += delta;
- count -= delta;
- }
-
- return error;
- }
-
-
- static FT_ULong
- ft_lzw_file_io( FT_LZWFile zip,
- FT_ULong pos,
- FT_Byte* buffer,
- FT_ULong count )
- {
- FT_ULong result = 0;
- FT_Error error;
-
-
- /* seeking backwards. */
- if ( pos < zip->pos )
- {
- /* If the new position is within the output buffer, simply */
- /* decrement pointers, otherwise we reset the stream completely! */
- if ( ( zip->pos - pos ) <= (FT_ULong)( zip->cursor - zip->buffer ) )
- {
- zip->cursor -= zip->pos - pos;
- zip->pos = pos;
- }
- else
- {
- error = ft_lzw_file_reset( zip );
- if ( error )
- goto Exit;
- }
- }
-
- /* skip unwanted bytes */
- if ( pos > zip->pos )
- {
- error = ft_lzw_file_skip_output( zip, (FT_ULong)( pos - zip->pos ) );
- if ( error )
- goto Exit;
- }
-
- if ( count == 0 )
- goto Exit;
-
- /* now read the data */
- for (;;)
- {
- FT_ULong delta;
-
-
- delta = (FT_ULong)( zip->limit - zip->cursor );
- if ( delta >= count )
- delta = count;
-
- FT_MEM_COPY( buffer + result, zip->cursor, delta );
- result += delta;
- zip->cursor += delta;
- zip->pos += delta;
-
- count -= delta;
- if ( count == 0 )
- break;
-
- error = ft_lzw_file_fill_output( zip );
- if ( error )
- break;
- }
-
- Exit:
- return result;
- }
-
-
-/***************************************************************************/
-/***************************************************************************/
-/***** *****/
-/***** L Z W E M B E D D I N G S T R E A M *****/
-/***** *****/
-/***************************************************************************/
-/***************************************************************************/
-
- static void
- ft_lzw_stream_close( FT_Stream stream )
- {
- FT_LZWFile zip = (FT_LZWFile)stream->descriptor.pointer;
- FT_Memory memory = stream->memory;
-
-
- if ( zip )
- {
- /* finalize lzw file descriptor */
- ft_lzw_file_done( zip );
-
- FT_FREE( zip );
-
- stream->descriptor.pointer = NULL;
- }
- }
-
-
- static FT_ULong
- ft_lzw_stream_io( FT_Stream stream,
- FT_ULong pos,
- FT_Byte* buffer,
- FT_ULong count )
- {
- FT_LZWFile zip = (FT_LZWFile)stream->descriptor.pointer;
-
-
- return ft_lzw_file_io( zip, pos, buffer, count );
- }
-
-
- FT_EXPORT_DEF( FT_Error )
- FT_Stream_OpenLZW( FT_Stream stream,
- FT_Stream source )
- {
- FT_Error error;
- FT_Memory memory = source->memory;
- FT_LZWFile zip;
-
-
- /*
- * Check the header right now; this prevents allocation of a huge
- * LZWFile object (400 KByte of heap memory) if not necessary.
- *
- * Did I mention that you should never use .Z compressed font
- * files?
- */
- error = ft_lzw_check_header( source );
- if ( error )
- goto Exit;
-
- FT_ZERO( stream );
- stream->memory = memory;
-
- if ( !FT_NEW( zip ) )
- {
- error = ft_lzw_file_init( zip, stream, source );
- if ( error )
- {
- FT_FREE( zip );
- goto Exit;
- }
-
- stream->descriptor.pointer = zip;
- }
-
- stream->size = 0x7FFFFFFFL; /* don't know the real size! */
- stream->pos = 0;
- stream->base = 0;
- stream->read = ft_lzw_stream_io;
- stream->close = ft_lzw_stream_close;
-
- Exit:
- return error;
- }
-
-
-#include "ftzopen.c"
-
-
-#else /* !FT_CONFIG_OPTION_USE_LZW */
-
-
- FT_EXPORT_DEF( FT_Error )
- FT_Stream_OpenLZW( FT_Stream stream,
- FT_Stream source )
- {
- FT_UNUSED( stream );
- FT_UNUSED( source );
-
- return LZW_Err_Unimplemented_Feature;
- }
-
-
-#endif /* !FT_CONFIG_OPTION_USE_LZW */
-
-
-/* END */