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1059
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"{ Package: 'ca:Compress' }"
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2 |
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CompressionStream subclass:#BZipStream
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1060
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instanceVariableNames:''
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classVariableNames:''
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poolDictionaries:''
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category:'A-Compress'
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1059
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!
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!BZipStream 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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1060
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#include "bzlib/bzlib.h"
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1059
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typedef enum {
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e_opmode_unspecified
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, e_opmode_deflate
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, e_opmode_inflate
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} e_opmode;
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typedef struct {
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bz_stream stream;
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char * in_ref;
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char * out_ref;
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unsigned int out_total;
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e_opmode op_mode;
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} zstream_s;
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%}
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! !
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37 |
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!BZipStream methodsFor:'low level'!
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39 |
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zclose
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"low level close of the zip stream
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"
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onStream := mode := nil.
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hitEOF := true.
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zstream ifNil:[^ self].
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self unregisterForFinalization.
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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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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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__INST(zstream) = nil;
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56 |
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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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zstream := nil.
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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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_bfsize = _zstream->out_total;
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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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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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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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_count = _zstream->out_total - _zstream->stream.avail_out;
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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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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, _count;
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zstream_s * _zstream;
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_zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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if( _zstream->op_mode != e_opmode_inflate )
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RETURN( nil );
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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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if( _zstream->stream.avail_in == 0 )
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RETURN( __MKSMALLINT (0) );
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_zstream->stream.avail_out = _zstream->out_total;
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_zstream->stream.next_out = _zstream->out_ref;
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214 |
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_errorNo = BZ2_bzDecompress( & _zstream->stream );
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if( _errorNo == BZ_STREAM_END )
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_errorNo = BZ2_bzDecompressEnd( & _zstream->stream );
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if( _errorNo == BZ_OK )
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{
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_count = _zstream->out_total - _zstream->stream.avail_out;
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RETURN( __MKSMALLINT (_count) );
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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:[ self errorNotOpen ].
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self zerror:errorNo.
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!
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zinflateInit
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"low level - inflateInit
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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;
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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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_zstream->op_mode = e_opmode_inflate;
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_errorNo = BZ2_bzDecompressInit( & _zstream->stream, 0, 1 );
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if( _errorNo == BZ_OK )
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RETURN( self );
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_zstream->stream.avail_in = 0;
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errorNo = __MKSMALLINT( _errorNo );
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}
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%}.
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errorNo ifNil:[ self errorNotOpen ].
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self zerror:errorNo.
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!
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zopen
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"low level - opens the zip stream
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"
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|outTotal|
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outTotal := outputBytes size.
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%{
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zstream_s * _zstream = (zstream_s *) malloc( sizeof(zstream_s) );
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if( _zstream )
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{
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OBJ _zobj = __MKEXTERNALADDRESS( _zstream );
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OBJ _outObj = __INST( outputBytes );
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OBJ _inpObj = __INST( inputBytes );
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_zstream->in_ref = (char *) __externalBytesAddress( _inpObj );
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_zstream->stream.next_in = NULL;
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_zstream->stream.avail_in = 0;
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_zstream->stream.total_in_lo32 = 0;
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_zstream->stream.total_in_hi32 = 0;
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282 |
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_zstream->out_total = __intVal( outTotal );
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_zstream->out_ref = (char *) __externalBytesAddress( _outObj );
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_zstream->stream.next_out = _zstream->out_ref;
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_zstream->stream.avail_out = _zstream->out_total;
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287 |
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_zstream->stream.total_out_lo32 = 0;
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_zstream->stream.total_out_hi32 = 0;
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290 |
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_zstream->stream.bzalloc = 0;
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_zstream->stream.bzfree = 0;
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_zstream->stream.opaque = 0;
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_zstream->op_mode = e_opmode_unspecified;
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296 |
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__INST (zstream) = _zobj;
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__STORE(self, _zobj);
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}
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%}.
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301 |
!
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302 |
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zset_avail_in:count
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304 |
"set the 'avail_in' and compute the crc
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305 |
"
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%{
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307 |
OBJ _zstreamObj = __INST( zstream );
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308 |
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if( (_zstreamObj != nil) && __isSmallInteger(count) )
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310 |
{
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int _count;
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zstream_s * _zstream = (zstream_s *) __externalBytesAddress( _zstreamObj );
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313 |
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314 |
if( (_count = __intVal( count )) > 0 )
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315 |
{
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316 |
char * _in_ref = _zstream->in_ref;
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317 |
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318 |
_zstream->stream.avail_in = _count;
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319 |
_zstream->stream.next_in = _in_ref;
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320 |
} else {
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321 |
_zstream->stream.avail_in = 0;
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322 |
_zstream->stream.next_in = NULL;
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323 |
}
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324 |
RETURN( self );
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325 |
}
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326 |
%}.
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327 |
zstream ifNil:[ self errorNotOpen ].
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328 |
self invalidArguments.
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329 |
! !
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330 |
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