--- a/misc/libfreetype/src/bzip2/ftbzip2.c Tue Jul 16 11:14:27 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,510 +0,0 @@
-/***************************************************************************/
-/* */
-/* ftbzip2.c */
-/* */
-/* FreeType support for .bz2 compressed files. */
-/* */
-/* This optional component relies on libbz2. It should mainly be used to */
-/* parse compressed PCF fonts, as found with many X11 server */
-/* distributions. */
-/* */
-/* Copyright 2010 by */
-/* Joel Klinghed. */
-/* */
-/* Based on src/gzip/ftgzip.c, Copyright 2002 - 2010 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_BZIP2_H
-#include FT_CONFIG_STANDARD_LIBRARY_H
-
-
-#include FT_MODULE_ERRORS_H
-
-#undef __FTERRORS_H__
-
-#define FT_ERR_PREFIX Bzip2_Err_
-#define FT_ERR_BASE FT_Mod_Err_Bzip2
-
-#include FT_ERRORS_H
-
-
-#ifdef FT_CONFIG_OPTION_USE_BZIP2
-
-#ifdef FT_CONFIG_OPTION_PIC
-#error "bzip2 code does not support PIC yet"
-#endif
-
-#define BZ_NO_STDIO /* Do not need FILE */
-#include <bzlib.h>
-
-
-/***************************************************************************/
-/***************************************************************************/
-/***** *****/
-/***** B Z I P 2 M E M O R Y M A N A G E M E N T *****/
-/***** *****/
-/***************************************************************************/
-/***************************************************************************/
-
- /* it is better to use FreeType memory routines instead of raw
- 'malloc/free' */
-
- typedef void *(* alloc_func)(void*, int, int);
- typedef void (* free_func)(void*, void*);
-
- static void*
- ft_bzip2_alloc( FT_Memory memory,
- int items,
- int size )
- {
- FT_ULong sz = (FT_ULong)size * items;
- FT_Error error;
- FT_Pointer p = NULL;
-
-
- (void)FT_ALLOC( p, sz );
- return p;
- }
-
-
- static void
- ft_bzip2_free( FT_Memory memory,
- void* address )
- {
- FT_MEM_FREE( address );
- }
-
-
-/***************************************************************************/
-/***************************************************************************/
-/***** *****/
-/***** B Z I P 2 F I L E D E S C R I P T O R *****/
-/***** *****/
-/***************************************************************************/
-/***************************************************************************/
-
-#define FT_BZIP2_BUFFER_SIZE 4096
-
- typedef struct FT_BZip2FileRec_
- {
- FT_Stream source; /* parent/source stream */
- FT_Stream stream; /* embedding stream */
- FT_Memory memory; /* memory allocator */
- bz_stream bzstream; /* bzlib input stream */
-
- FT_Byte input[FT_BZIP2_BUFFER_SIZE]; /* input read buffer */
-
- FT_Byte buffer[FT_BZIP2_BUFFER_SIZE]; /* output buffer */
- FT_ULong pos; /* position in output */
- FT_Byte* cursor;
- FT_Byte* limit;
-
- } FT_BZip2FileRec, *FT_BZip2File;
-
-
- /* check and skip .bz2 header - we don't support `transparent' compression */
- static FT_Error
- ft_bzip2_check_header( FT_Stream stream )
- {
- FT_Error error = Bzip2_Err_Ok;
- FT_Byte head[4];
-
-
- if ( FT_STREAM_SEEK( 0 ) ||
- FT_STREAM_READ( head, 4 ) )
- goto Exit;
-
- /* head[0] && head[1] are the magic numbers; */
- /* head[2] is the version, and head[3] the blocksize */
- if ( head[0] != 0x42 ||
- head[1] != 0x5a ||
- head[2] != 0x68 ) /* only support bzip2 (huffman) */
- {
- error = Bzip2_Err_Invalid_File_Format;
- goto Exit;
- }
-
- Exit:
- return error;
- }
-
-
- static FT_Error
- ft_bzip2_file_init( FT_BZip2File zip,
- FT_Stream stream,
- FT_Stream source )
- {
- bz_stream* bzstream = &zip->bzstream;
- FT_Error error = Bzip2_Err_Ok;
-
-
- zip->stream = stream;
- zip->source = source;
- zip->memory = stream->memory;
-
- zip->limit = zip->buffer + FT_BZIP2_BUFFER_SIZE;
- zip->cursor = zip->limit;
- zip->pos = 0;
-
- /* check .bz2 header */
- {
- stream = source;
-
- error = ft_bzip2_check_header( stream );
- if ( error )
- goto Exit;
-
- if ( FT_STREAM_SEEK( 0 ) )
- goto Exit;
- }
-
- /* initialize bzlib */
- bzstream->bzalloc = (alloc_func)ft_bzip2_alloc;
- bzstream->bzfree = (free_func) ft_bzip2_free;
- bzstream->opaque = zip->memory;
-
- bzstream->avail_in = 0;
- bzstream->next_in = (char*)zip->buffer;
-
- if ( BZ2_bzDecompressInit( bzstream, 0, 0 ) != BZ_OK ||
- bzstream->next_in == NULL )
- error = Bzip2_Err_Invalid_File_Format;
-
- Exit:
- return error;
- }
-
-
- static void
- ft_bzip2_file_done( FT_BZip2File zip )
- {
- bz_stream* bzstream = &zip->bzstream;
-
-
- BZ2_bzDecompressEnd( bzstream );
-
- /* clear the rest */
- bzstream->bzalloc = NULL;
- bzstream->bzfree = NULL;
- bzstream->opaque = NULL;
- bzstream->next_in = NULL;
- bzstream->next_out = NULL;
- bzstream->avail_in = 0;
- bzstream->avail_out = 0;
-
- zip->memory = NULL;
- zip->source = NULL;
- zip->stream = NULL;
- }
-
-
- static FT_Error
- ft_bzip2_file_reset( FT_BZip2File zip )
- {
- FT_Stream stream = zip->source;
- FT_Error error;
-
-
- if ( !FT_STREAM_SEEK( 0 ) )
- {
- bz_stream* bzstream = &zip->bzstream;
-
-
- BZ2_bzDecompressEnd( bzstream );
-
- bzstream->avail_in = 0;
- bzstream->next_in = (char*)zip->input;
- bzstream->avail_out = 0;
- bzstream->next_out = (char*)zip->buffer;
-
- zip->limit = zip->buffer + FT_BZIP2_BUFFER_SIZE;
- zip->cursor = zip->limit;
- zip->pos = 0;
-
- BZ2_bzDecompressInit( bzstream, 0, 0 );
- }
-
- return error;
- }
-
-
- static FT_Error
- ft_bzip2_file_fill_input( FT_BZip2File zip )
- {
- bz_stream* bzstream = &zip->bzstream;
- FT_Stream stream = zip->source;
- FT_ULong size;
-
-
- if ( stream->read )
- {
- size = stream->read( stream, stream->pos, zip->input,
- FT_BZIP2_BUFFER_SIZE );
- if ( size == 0 )
- return Bzip2_Err_Invalid_Stream_Operation;
- }
- else
- {
- size = stream->size - stream->pos;
- if ( size > FT_BZIP2_BUFFER_SIZE )
- size = FT_BZIP2_BUFFER_SIZE;
-
- if ( size == 0 )
- return Bzip2_Err_Invalid_Stream_Operation;
-
- FT_MEM_COPY( zip->input, stream->base + stream->pos, size );
- }
- stream->pos += size;
-
- bzstream->next_in = (char*)zip->input;
- bzstream->avail_in = size;
-
- return Bzip2_Err_Ok;
- }
-
-
- static FT_Error
- ft_bzip2_file_fill_output( FT_BZip2File zip )
- {
- bz_stream* bzstream = &zip->bzstream;
- FT_Error error = Bzip2_Err_Ok;
-
-
- zip->cursor = zip->buffer;
- bzstream->next_out = (char*)zip->cursor;
- bzstream->avail_out = FT_BZIP2_BUFFER_SIZE;
-
- while ( bzstream->avail_out > 0 )
- {
- int err;
-
-
- if ( bzstream->avail_in == 0 )
- {
- error = ft_bzip2_file_fill_input( zip );
- if ( error )
- break;
- }
-
- err = BZ2_bzDecompress( bzstream );
-
- if ( err == BZ_STREAM_END )
- {
- zip->limit = (FT_Byte*)bzstream->next_out;
- if ( zip->limit == zip->cursor )
- error = Bzip2_Err_Invalid_Stream_Operation;
- break;
- }
- else if ( err != BZ_OK )
- {
- error = Bzip2_Err_Invalid_Stream_Operation;
- break;
- }
- }
-
- return error;
- }
-
-
- /* fill output buffer; `count' must be <= FT_BZIP2_BUFFER_SIZE */
- static FT_Error
- ft_bzip2_file_skip_output( FT_BZip2File zip,
- FT_ULong count )
- {
- FT_Error error = Bzip2_Err_Ok;
- FT_ULong delta;
-
-
- for (;;)
- {
- delta = (FT_ULong)( zip->limit - zip->cursor );
- if ( delta >= count )
- delta = count;
-
- zip->cursor += delta;
- zip->pos += delta;
-
- count -= delta;
- if ( count == 0 )
- break;
-
- error = ft_bzip2_file_fill_output( zip );
- if ( error )
- break;
- }
-
- return error;
- }
-
-
- static FT_ULong
- ft_bzip2_file_io( FT_BZip2File zip,
- FT_ULong pos,
- FT_Byte* buffer,
- FT_ULong count )
- {
- FT_ULong result = 0;
- FT_Error error;
-
-
- /* Reset inflate stream if we're seeking backwards. */
- /* Yes, that is not too efficient, but it saves memory :-) */
- if ( pos < zip->pos )
- {
- error = ft_bzip2_file_reset( zip );
- if ( error )
- goto Exit;
- }
-
- /* skip unwanted bytes */
- if ( pos > zip->pos )
- {
- error = ft_bzip2_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, zip->cursor, delta );
- buffer += delta;
- result += delta;
- zip->cursor += delta;
- zip->pos += delta;
-
- count -= delta;
- if ( count == 0 )
- break;
-
- error = ft_bzip2_file_fill_output( zip );
- if ( error )
- break;
- }
-
- Exit:
- return result;
- }
-
-
-/***************************************************************************/
-/***************************************************************************/
-/***** *****/
-/***** B Z E M B E D D I N G S T R E A M *****/
-/***** *****/
-/***************************************************************************/
-/***************************************************************************/
-
- static void
- ft_bzip2_stream_close( FT_Stream stream )
- {
- FT_BZip2File zip = (FT_BZip2File)stream->descriptor.pointer;
- FT_Memory memory = stream->memory;
-
-
- if ( zip )
- {
- /* finalize bzip file descriptor */
- ft_bzip2_file_done( zip );
-
- FT_FREE( zip );
-
- stream->descriptor.pointer = NULL;
- }
- }
-
-
- static FT_ULong
- ft_bzip2_stream_io( FT_Stream stream,
- FT_ULong pos,
- FT_Byte* buffer,
- FT_ULong count )
- {
- FT_BZip2File zip = (FT_BZip2File)stream->descriptor.pointer;
-
-
- return ft_bzip2_file_io( zip, pos, buffer, count );
- }
-
-
- FT_EXPORT_DEF( FT_Error )
- FT_Stream_OpenBzip2( FT_Stream stream,
- FT_Stream source )
- {
- FT_Error error;
- FT_Memory memory = source->memory;
- FT_BZip2File zip;
-
-
- /*
- * check the header right now; this prevents allocating unnecessary
- * objects when we don't need them
- */
- error = ft_bzip2_check_header( source );
- if ( error )
- goto Exit;
-
- FT_ZERO( stream );
- stream->memory = memory;
-
- if ( !FT_QNEW( zip ) )
- {
- error = ft_bzip2_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_bzip2_stream_io;
- stream->close = ft_bzip2_stream_close;
-
- Exit:
- return error;
- }
-
-#else /* !FT_CONFIG_OPTION_USE_BZIP2 */
-
- FT_EXPORT_DEF( FT_Error )
- FT_Stream_OpenBzip2( FT_Stream stream,
- FT_Stream source )
- {
- FT_UNUSED( stream );
- FT_UNUSED( source );
-
- return Bzip2_Err_Unimplemented_Feature;
- }
-
-#endif /* !FT_CONFIG_OPTION_USE_BZIP2 */
-
-
-/* END */