diff options
Diffstat (limited to 'nx-X11/extras/freetype2/src/lzw/ftlzw.c')
-rw-r--r-- | nx-X11/extras/freetype2/src/lzw/ftlzw.c | 463 |
1 files changed, 0 insertions, 463 deletions
diff --git a/nx-X11/extras/freetype2/src/lzw/ftlzw.c b/nx-X11/extras/freetype2/src/lzw/ftlzw.c deleted file mode 100644 index a0e4cc576..000000000 --- a/nx-X11/extras/freetype2/src/lzw/ftlzw.c +++ /dev/null @@ -1,463 +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 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 <string.h> -#include <stdio.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 - -#include "zopen.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 */ - s_zstate_t zstream; /* lzw input stream */ - - FT_ULong start; /* starting position, after .Z header */ - FT_Byte input[FT_LZW_BUFFER_SIZE]; /* input buffer */ - - 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 ) - { - s_zstate_t* zstream = &zip->zstream; - 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 */ - { - stream = source; - - error = ft_lzw_check_header( source ); - if ( error ) - goto Exit; - - zip->start = FT_STREAM_POS(); - } - - /* initialize internal lzw variable */ - zinit( zstream ); - - zstream->avail_in = 0; - zstream->next_in = zip->buffer; - zstream->zs_in_count = source->size - 2; - - if ( zstream->next_in == NULL ) - error = LZW_Err_Invalid_File_Format; - - Exit: - return error; - } - - - static void - ft_lzw_file_done( FT_LZWFile zip ) - { - s_zstate_t* zstream = &zip->zstream; - - - /* clear the rest */ - zstream->next_in = NULL; - zstream->next_out = NULL; - zstream->avail_in = 0; - zstream->avail_out = 0; - zstream->total_in = 0; - zstream->total_out = 0; - - 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( zip->start ) ) - { - s_zstate_t* zstream = &zip->zstream; - - - zinit( zstream ); - - zstream->avail_in = 0; - zstream->next_in = zip->input; - zstream->total_in = 0; - zstream->avail_out = 0; - zstream->next_out = zip->buffer; - zstream->total_out = 0; - zstream->zs_in_count = zip->source->size - 2; - - zip->limit = zip->buffer + FT_LZW_BUFFER_SIZE; - zip->cursor = zip->limit; - zip->pos = 0; - } - - return error; - } - - - static FT_Error - ft_lzw_file_fill_input( FT_LZWFile zip ) - { - s_zstate_t* zstream = &zip->zstream; - FT_Stream stream = zip->source; - FT_ULong size; - - - if ( stream->read ) - { - size = stream->read( stream, stream->pos, zip->input, - FT_LZW_BUFFER_SIZE ); - if ( size == 0 ) - return LZW_Err_Invalid_Stream_Operation; - } - else - { - size = stream->size - stream->pos; - if ( size > FT_LZW_BUFFER_SIZE ) - size = FT_LZW_BUFFER_SIZE; - - if ( size == 0 ) - return LZW_Err_Invalid_Stream_Operation; - - FT_MEM_COPY( zip->input, stream->base + stream->pos, size ); - } - stream->pos += size; - - zstream->next_in = zip->input; - zstream->avail_in = size; - - return LZW_Err_Ok; - } - - - - static FT_Error - ft_lzw_file_fill_output( FT_LZWFile zip ) - { - s_zstate_t* zstream = &zip->zstream; - FT_Error error = 0; - - - zip->cursor = zip->buffer; - zstream->next_out = zip->cursor; - zstream->avail_out = FT_LZW_BUFFER_SIZE; - - while ( zstream->avail_out > 0 ) - { - int num_read = 0; - - - if ( zstream->avail_in == 0 ) - { - error = ft_lzw_file_fill_input( zip ); - if ( error ) - break; - } - - num_read = zread( zstream ); - - if ( num_read == -1 && zstream->zs_in_count == 0 ) - { - zip->limit = zstream->next_out; - if ( zip->limit == zip->cursor ) - error = LZW_Err_Invalid_Stream_Operation; - break; - } - else if ( num_read == -1 ) - break; - else - zstream->avail_out -= num_read; - } - - 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; - 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_lzw_file_fill_output( zip ); - if ( error ) - break; - } - - 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; - - - /* Teset inflate stream if we're seeking backwards. */ - /* Yes, that is not too efficient, but it saves memory :-) */ - if ( pos < zip->pos ) - { - 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, zip->cursor, delta ); - buffer += 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; - - - 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 "zopen.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 */ |