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"
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COPYRIGHT (c) 2002 by eXept Software AG
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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1195
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"{ Package: 'stx:libbasic2' }"
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1059
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1196
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CompressionStream subclass:#BZip2Stream
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'System-Compress'
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!
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1196
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!BZip2Stream primitiveDefinitions!
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%{
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/*
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* includes, defines, structure definitions
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* and typedefs come here.
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*/
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1196
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#include "bz2lib/bzlib.h"
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typedef enum {
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e_opmode_unspecified /* processing done */
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, e_opmode_deflate /* running deflate */
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, e_opmode_inflate /* running inflate */
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} e_opmode;
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typedef struct {
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bz_stream stream; /* pointer to the external in -stream */
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char * in_ref; /* size of the external in -stream */
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char * out_ref; /* pointer to the external out-stream */
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unsigned int out_total; /* size of the external out-stream */
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e_opmode op_mode; /* current operational mode */
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} zstream_s;
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%}
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! !
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1308
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!BZip2Stream class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 2002 by eXept Software AG
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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! !
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1193
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1196
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!BZip2Stream methodsFor:'low level'!
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zclose
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"low level close of the zip stream
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"
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%{
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OBJ _zstreamObj = __INST( zstream );
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if( _zstreamObj != nil )
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{
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1195
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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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__INST(zstream) = nil;
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if( _zstream->stream.state != NULL )
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{
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if( _zstream->op_mode == e_opmode_inflate )
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BZ2_bzDecompressEnd( & _zstream->stream );
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else
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BZ2_bzCompressEnd( & _zstream->stream );
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}
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free( _zstream );
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}
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%}.
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!
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zdeflate
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"low level - deflate
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"
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|errorNo|
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errorNo := nil.
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%{
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OBJ _zstreamObj = __INST( zstream );
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if( _zstreamObj != nil )
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{
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int _errorNo, _action;
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unsigned int _bfsize;
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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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if( _zstream->op_mode != e_opmode_deflate )
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RETURN( nil );
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1059
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1195
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_bfsize = _zstream->out_total;
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112 |
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1195
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if( _zstream->stream.state == NULL )
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{
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_zstream->op_mode = e_opmode_unspecified;
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RETURN( nil );
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}
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_action = (__INST(hitEOF) == true) ? BZ_FINISH : BZ_RUN;
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_zstream->stream.avail_out = _bfsize;
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_zstream->stream.next_out = _zstream->out_ref;
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_errorNo = BZ2_bzCompress( & _zstream->stream, _action );
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if( _errorNo == BZ_STREAM_END )
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{
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_zstream->stream.avail_in = 0;
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_zstream->stream.next_in = NULL;
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_errorNo = BZ2_bzCompressEnd( & _zstream->stream );
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}
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if( (_errorNo == BZ_OK)
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|| (_errorNo == BZ_RUN_OK)
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|| (_errorNo == BZ_FINISH_OK)
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)
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{
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if( (_zstream->stream.avail_out != _bfsize)
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|| (_zstream->stream.avail_in != 0)
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)
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RETURN( true );
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1059
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1195
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RETURN( false );
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}
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errorNo = __MKSMALLINT( _errorNo );
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}
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%}.
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errorNo ifNil:[
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1195
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zstream ifNil:[self errorNotOpen].
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self invalidArguments.
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].
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self zerror:errorNo.
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!
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zdeflateInit
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"low level - open for reading
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"
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|errorNo blockSize100k workFactor|
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errorNo := nil.
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blockSize100k := BlockSize.
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workFactor := 30.
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%{
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OBJ _zstreamObj = __INST( zstream );
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if( (_zstreamObj != nil) && __bothSmallInteger(blockSize100k, workFactor) )
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{
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int _errorNo;
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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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_zstream->op_mode = e_opmode_deflate;
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_errorNo = BZ2_bzCompressInit( & _zstream->stream
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, __intVal( blockSize100k ), 0, __intVal( workFactor ) );
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if( _errorNo == BZ_OK )
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RETURN( self );
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errorNo = __MKSMALLINT( _errorNo );
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}
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%}.
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errorNo ifNil:[
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zstream ifNil:[ self errorNotOpen ].
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self invalidArguments .
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].
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self zerror:errorNo.
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!
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zget_avail_out
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"low level - get the number of available out bytes
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"
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%{
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OBJ _zstreamObj = __INST( zstream );
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if( _zstreamObj != nil )
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{
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unsigned int _count;
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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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1059
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198 |
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1195
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_count = _zstream->out_total - _zstream->stream.avail_out;
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200 |
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1195
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RETURN( __MKSMALLINT (_count) );
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}
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%}.
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self errorNotOpen.
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!
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zinflate
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"low level - inflate
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"
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|errorNo|
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211 |
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errorNo := nil.
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%{
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214 |
OBJ _zstreamObj = __INST( zstream );
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215 |
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216 |
if( _zstreamObj != nil )
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{
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1195
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218 |
int _errorNo, _count;
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zstream_s * _zstream;
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1059
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220 |
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1195
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_zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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1059
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222 |
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1195
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if( _zstream->op_mode != e_opmode_inflate )
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224 |
RETURN( nil );
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1059
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225 |
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1195
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226 |
if( _zstream->stream.state == NULL )
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{
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228 |
_zstream->op_mode = e_opmode_unspecified;
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229 |
RETURN( nil );
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230 |
}
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231 |
if( _zstream->stream.avail_in == 0 )
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232 |
RETURN( __MKSMALLINT (0) );
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1059
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233 |
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1195
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_zstream->stream.avail_out = _zstream->out_total;
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235 |
_zstream->stream.next_out = _zstream->out_ref;
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1059
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236 |
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1195
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_errorNo = BZ2_bzDecompress( & _zstream->stream );
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1059
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238 |
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1195
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if( _errorNo == BZ_STREAM_END )
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240 |
_errorNo = BZ2_bzDecompressEnd( & _zstream->stream );
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241 |
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1195
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242 |
if( _errorNo == BZ_OK )
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243 |
{
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244 |
_count = _zstream->out_total - _zstream->stream.avail_out;
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1059
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245 |
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1195
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246 |
RETURN( __MKSMALLINT (_count) );
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247 |
}
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248 |
errorNo = __MKSMALLINT( _errorNo );
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1059
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249 |
}
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250 |
%}.
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errorNo ifNil:[ self errorNotOpen ].
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252 |
self zerror:errorNo.
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253 |
!
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254 |
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255 |
zinflateInit
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256 |
"low level - inflateInit
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257 |
"
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258 |
|errorNo|
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259 |
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260 |
errorNo := nil.
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261 |
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262 |
%{
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263 |
OBJ _zstreamObj = __INST( zstream );
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264 |
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265 |
if( _zstreamObj != nil )
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266 |
{
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1195
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267 |
int _errorNo;
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268 |
zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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1059
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269 |
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1195
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270 |
_zstream->op_mode = e_opmode_inflate;
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271 |
_errorNo = BZ2_bzDecompressInit( & _zstream->stream, 0, 1 );
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1059
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272 |
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1195
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273 |
if( _errorNo == BZ_OK )
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274 |
RETURN( self );
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1059
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275 |
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1195
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276 |
_zstream->stream.avail_in = 0;
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277 |
errorNo = __MKSMALLINT( _errorNo );
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1059
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278 |
}
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279 |
%}.
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280 |
errorNo ifNil:[ self errorNotOpen ].
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281 |
self zerror:errorNo.
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282 |
!
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283 |
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284 |
zopen
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285 |
"low level - opens the zip stream
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286 |
"
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287 |
|outTotal|
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288 |
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289 |
outTotal := outputBytes size.
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290 |
%{
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291 |
zstream_s * _zstream = (zstream_s *) malloc( sizeof(zstream_s) );
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292 |
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293 |
if( _zstream )
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294 |
{
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1195
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295 |
OBJ _zobj = __MKEXTERNALADDRESS( _zstream );
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296 |
OBJ _outObj = __INST( outputBytes );
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297 |
OBJ _inpObj = __INST( inputBytes );
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1059
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298 |
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1195
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299 |
_zstream->in_ref = (char *) __externalBytesAddress( _inpObj );
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|
300 |
_zstream->stream.next_in = NULL;
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301 |
_zstream->stream.avail_in = 0;
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302 |
_zstream->stream.total_in_lo32 = 0;
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303 |
_zstream->stream.total_in_hi32 = 0;
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1059
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304 |
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1195
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305 |
_zstream->out_total = __intVal( outTotal );
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|
306 |
_zstream->out_ref = (char *) __externalBytesAddress( _outObj );
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307 |
_zstream->stream.next_out = _zstream->out_ref;
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|
308 |
_zstream->stream.avail_out = _zstream->out_total;
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1059
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309 |
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1195
|
310 |
_zstream->stream.total_out_lo32 = 0;
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|
311 |
_zstream->stream.total_out_hi32 = 0;
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1059
|
312 |
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1195
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313 |
_zstream->stream.bzalloc = 0;
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314 |
_zstream->stream.bzfree = 0;
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|
315 |
_zstream->stream.opaque = 0;
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1059
|
316 |
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1195
|
317 |
_zstream->op_mode = e_opmode_unspecified;
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1059
|
318 |
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1195
|
319 |
__INST (zstream) = _zobj;
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|
320 |
__STORE(self, _zobj);
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1059
|
321 |
}
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322 |
%}.
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|
323 |
!
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324 |
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325 |
zset_avail_in:count
|
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1061
|
326 |
"set the 'avail_in'
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1059
|
327 |
"
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|
328 |
%{
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|
329 |
OBJ _zstreamObj = __INST( zstream );
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|
330 |
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|
331 |
if( (_zstreamObj != nil) && __isSmallInteger(count) )
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332 |
{
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1195
|
333 |
int _count;
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|
334 |
zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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1059
|
335 |
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1195
|
336 |
if( (_count = __intVal( count )) > 0 )
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|
337 |
{
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|
338 |
char * _in_ref = _zstream->in_ref;
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1059
|
339 |
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1195
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340 |
_zstream->stream.avail_in = _count;
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341 |
_zstream->stream.next_in = _in_ref;
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|
342 |
} else {
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|
343 |
_zstream->stream.avail_in = 0;
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|
344 |
_zstream->stream.next_in = NULL;
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|
345 |
}
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346 |
RETURN( self );
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1059
|
347 |
}
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348 |
%}.
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|
349 |
zstream ifNil:[ self errorNotOpen ].
|
|
|
350 |
self invalidArguments.
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|
|
351 |
! !
|
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352 |
|
|
1196
|
353 |
!BZip2Stream class methodsFor:'documentation'!
|
|
1193
|
354 |
|
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|
355 |
version
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1308
|
356 |
^ '$Header: /cvs/stx/stx/libbasic2/BZip2Stream.st,v 1.7 2003-08-29 19:31:11 cg Exp $'
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|
1193
|
357 |
! !
|