diff -r 92af50454cf2 -r 8054d9d775fd misc/libfreetype/src/bzip2/ftbzip2.c --- a/misc/libfreetype/src/bzip2/ftbzip2.c Fri Oct 11 11:55:31 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 -#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 - - -/***************************************************************************/ -/***************************************************************************/ -/***** *****/ -/***** 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 */