2005-10-20 17:33:34 +02:00
|
|
|
/***************************************************************************/
|
|
|
|
/* */
|
2006-05-04 09:13:05 +02:00
|
|
|
/* ftlzw.c */
|
2005-10-20 17:33:34 +02:00
|
|
|
/* */
|
2006-05-04 09:13:05 +02:00
|
|
|
/* FreeType support for .Z compressed files. */
|
2005-10-20 17:33:34 +02:00
|
|
|
/* */
|
|
|
|
/* 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. */
|
|
|
|
/* */
|
2015-01-17 20:41:43 +01:00
|
|
|
/* Copyright 2004-2015 by */
|
2005-10-20 17:33:34 +02:00
|
|
|
/* Albert Chin-A-Young. */
|
|
|
|
/* */
|
2015-03-11 07:14:15 +01:00
|
|
|
/* based on code in `src/gzip/ftgzip.c' */
|
2005-10-20 17:33:34 +02:00
|
|
|
/* */
|
|
|
|
/* 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
|
* builds/unix/ftsystem.c, include/freetype/config/ftheader.h,
include/freetype/internal/services/svotval.h,
include/freetype/internal/services/svpfr.h,
src/base/ftsystem.c, src/bdf/bdfdrivr.c, src/cache/ftcbasic.c,
src/cff/cffcmap.c, src/gzip/ftgzip.c, src/lzw/ftlzw.c,
src/lzw/ftlzw2.c, src/psaux/t1cmap.c, src/sfnt/ttbdf.c,
src/smooth/ftgrays.c:
solved -Wmissing-prototypes warnings with GCC
2006-02-25 15:53:02 +01:00
|
|
|
#include FT_LZW_H
|
2009-01-13 18:34:48 +01:00
|
|
|
#include FT_CONFIG_STANDARD_LIBRARY_H
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
|
|
|
|
#include FT_MODULE_ERRORS_H
|
|
|
|
|
|
|
|
#undef __FTERRORS_H__
|
|
|
|
|
Prepare source code for amalgamation.
* src\autofit\aferrors.h, src\bdf\bdferror.h, src\bzip2\ftbzip2.c,
src\cache\ftcerror.h, src\cff\cfferrs.h, src\cid\ciderrs.h,
src\gxvalid\gxverror.h, src\gzip\ftgzip.c, src\lzw\ftlzw.c,
src\otvalid\otverror.h, src\pcf\pcferror.h, src\pfr\pfrerror.h,
src\psaux\psauxerr.h, src\pshinter\pshnterr.h,
src\psnames\psnamerr.h, src\raster\rasterrs.h, src\sfnt\sferrors.h,
src\smooth\ftsmerrs.h, src\truetype\tterrors.h,
src\type1\t1errors.h, src\type42\t42error.h, src\winfonts\fnterrs.h:
Add #undef FT_ERR_PREFIX before #define FT_ERR_PREFIX.
2012-03-08 06:04:03 +01:00
|
|
|
#undef FT_ERR_PREFIX
|
2005-10-20 17:33:34 +02:00
|
|
|
#define FT_ERR_PREFIX LZW_Err_
|
|
|
|
#define FT_ERR_BASE FT_Mod_Err_LZW
|
|
|
|
|
|
|
|
#include FT_ERRORS_H
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef FT_CONFIG_OPTION_USE_LZW
|
|
|
|
|
2009-04-05 17:25:14 +02:00
|
|
|
#ifdef FT_CONFIG_OPTION_PIC
|
|
|
|
#error "lzw code does not support PIC yet"
|
2012-01-16 18:00:24 +01:00
|
|
|
#endif
|
2009-04-05 17:25:14 +02:00
|
|
|
|
2005-10-20 17:33:34 +02:00
|
|
|
#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 *****/
|
|
|
|
/***** *****/
|
|
|
|
/***************************************************************************/
|
|
|
|
/***************************************************************************/
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
#define FT_LZW_BUFFER_SIZE 4096
|
2005-10-20 17:33:34 +02:00
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
typedef struct FT_LZWFileRec_
|
2005-10-20 17:33:34 +02:00
|
|
|
{
|
|
|
|
FT_Stream source; /* parent/source stream */
|
|
|
|
FT_Stream stream; /* embedding stream */
|
|
|
|
FT_Memory memory; /* memory allocator */
|
|
|
|
FT_LzwStateRec lzw; /* lzw decompressor state */
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
FT_Byte buffer[FT_LZW_BUFFER_SIZE]; /* output buffer */
|
|
|
|
FT_ULong pos; /* position in output */
|
2005-10-20 17:33:34 +02:00
|
|
|
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;
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
/* head[0] && head[1] are the magic numbers */
|
2014-12-07 11:03:57 +01:00
|
|
|
if ( head[0] != 0x1F ||
|
|
|
|
head[1] != 0x9D )
|
2013-03-14 10:27:35 +01:00
|
|
|
error = FT_THROW( Invalid_File_Format );
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
Exit:
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static FT_Error
|
|
|
|
ft_lzw_file_init( FT_LZWFile zip,
|
|
|
|
FT_Stream stream,
|
|
|
|
FT_Stream source )
|
|
|
|
{
|
|
|
|
FT_LzwState lzw = &zip->lzw;
|
2013-06-04 10:30:48 +02:00
|
|
|
FT_Error error;
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
|
|
|
|
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 */
|
2010-01-05 20:00:35 +01:00
|
|
|
error = ft_lzw_check_header( source );
|
|
|
|
if ( error )
|
|
|
|
goto Exit;
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
/* 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;
|
2013-03-14 11:21:17 +01:00
|
|
|
FT_Error error = FT_Err_Ok;
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
|
|
|
|
zip->cursor = zip->buffer;
|
|
|
|
|
|
|
|
count = ft_lzwstate_io( lzw, zip->buffer, FT_LZW_BUFFER_SIZE );
|
|
|
|
|
|
|
|
zip->limit = zip->cursor + count;
|
|
|
|
|
|
|
|
if ( count == 0 )
|
2013-03-14 10:27:35 +01:00
|
|
|
error = FT_THROW( Invalid_Stream_Operation );
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
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 )
|
|
|
|
{
|
2013-03-14 11:21:17 +01:00
|
|
|
FT_Error error = FT_Err_Ok;
|
2005-10-20 17:33:34 +02:00
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
|
|
|
|
/* first, we skip what we can from the output buffer */
|
2005-10-20 17:33:34 +02:00
|
|
|
{
|
|
|
|
FT_ULong delta = (FT_ULong)( zip->limit - zip->cursor );
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
|
2005-10-20 17:33:34 +02:00
|
|
|
if ( delta >= count )
|
|
|
|
delta = count;
|
|
|
|
|
|
|
|
zip->cursor += delta;
|
|
|
|
zip->pos += delta;
|
|
|
|
|
|
|
|
count -= delta;
|
|
|
|
}
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
/* next, we skip as many bytes remaining as possible */
|
2005-10-20 17:33:34 +02:00
|
|
|
while ( count > 0 )
|
|
|
|
{
|
|
|
|
FT_ULong delta = FT_LZW_BUFFER_SIZE;
|
|
|
|
FT_ULong numread;
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
|
2005-10-20 17:33:34 +02:00
|
|
|
if ( delta > count )
|
|
|
|
delta = count;
|
|
|
|
|
|
|
|
numread = ft_lzwstate_io( &zip->lzw, NULL, delta );
|
|
|
|
if ( numread < delta )
|
|
|
|
{
|
|
|
|
/* not enough bytes */
|
2013-03-14 10:27:35 +01:00
|
|
|
error = FT_THROW( Invalid_Stream_Operation );
|
2005-10-20 17:33:34 +02:00
|
|
|
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 )
|
|
|
|
{
|
2005-10-23 21:25:41 +02:00
|
|
|
/* 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 ) )
|
2005-10-20 17:33:34 +02:00
|
|
|
{
|
2005-10-23 21:25:41 +02:00
|
|
|
zip->cursor -= zip->pos - pos;
|
2005-10-20 17:33:34 +02:00
|
|
|
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;
|
2014-11-26 21:59:21 +01:00
|
|
|
FT_Memory memory;
|
2011-06-14 19:48:33 +02:00
|
|
|
FT_LZWFile zip = NULL;
|
2005-10-20 17:33:34 +02:00
|
|
|
|
|
|
|
|
2014-11-26 21:59:21 +01:00
|
|
|
if ( !stream || !source )
|
|
|
|
{
|
|
|
|
error = FT_THROW( Invalid_Stream_Handle );
|
|
|
|
goto Exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
memory = source->memory;
|
|
|
|
|
2005-10-20 17:33:34 +02:00
|
|
|
/*
|
2005-10-23 21:25:41 +02:00
|
|
|
* Check the header right now; this prevents allocation of a huge
|
2005-10-20 17:33:34 +02:00
|
|
|
* LZWFile object (400 KByte of heap memory) if not necessary.
|
|
|
|
*
|
|
|
|
* Did I mention that you should never use .Z compressed font
|
2005-10-23 21:25:41 +02:00
|
|
|
* files?
|
2005-10-20 17:33:34 +02:00
|
|
|
*/
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2005-10-23 21:25:41 +02:00
|
|
|
|
2005-10-20 17:33:34 +02:00
|
|
|
#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 );
|
|
|
|
|
2013-03-14 10:27:35 +01:00
|
|
|
return FT_THROW( Unimplemented_Feature );
|
2005-10-20 17:33:34 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#endif /* !FT_CONFIG_OPTION_USE_LZW */
|
|
|
|
|
|
|
|
|
|
|
|
/* END */
|