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-rw-r--r--tools/source/zcodec/zcodec.cxx524
1 files changed, 524 insertions, 0 deletions
diff --git a/tools/source/zcodec/zcodec.cxx b/tools/source/zcodec/zcodec.cxx
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+++ b/tools/source/zcodec/zcodec.cxx
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+/*************************************************************************
+ *
+ * $RCSfile: zcodec.cxx,v $
+ *
+ * $Revision: 1.1.1.1 $
+ *
+ * last change: $Author: hr $ $Date: 2000-09-18 17:03:10 $
+ *
+ * The Contents of this file are made available subject to the terms of
+ * either of the following licenses
+ *
+ * - GNU Lesser General Public License Version 2.1
+ * - Sun Industry Standards Source License Version 1.1
+ *
+ * Sun Microsystems Inc., October, 2000
+ *
+ * GNU Lesser General Public License Version 2.1
+ * =============================================
+ * Copyright 2000 by Sun Microsystems, Inc.
+ * 901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ *
+ * Sun Industry Standards Source License Version 1.1
+ * =================================================
+ * The contents of this file are subject to the Sun Industry Standards
+ * Source License Version 1.1 (the "License"); You may not use this file
+ * except in compliance with the License. You may obtain a copy of the
+ * License at http://www.openoffice.org/license.html.
+ *
+ * Software provided under this License is provided on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ * See the License for the specific provisions governing your rights and
+ * obligations concerning the Software.
+ *
+ * The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ * Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ * All Rights Reserved.
+ *
+ * Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _STREAM_HXX
+#include "stream.hxx"
+#endif
+#ifndef _ZLIB_H
+#include "zlib/zlib.h"
+#endif
+#ifndef _ZCODEC_HXX
+#include "zcodec.hxx"
+#endif
+#ifndef _RTL_CRC_H_
+#include <rtl/crc.h>
+#endif
+
+// -----------
+// - Defines -
+// -----------
+
+#define PZSTREAM ((z_stream*) mpsC_Stream)
+
+/* gzip flag byte */
+#define GZ_ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
+#define GZ_HEAD_CRC 0x02 /* bit 1 set: header CRC present */
+#define GZ_EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
+#define GZ_ORIG_NAME 0x08 /* bit 3 set: original file name present */
+#define GZ_COMMENT 0x10 /* bit 4 set: file comment present */
+#define GZ_RESERVED 0xE0 /* bits 5..7: reserved */
+
+static int gz_magic[2] = { 0x1f, 0x8b }; /* gzip magic header */
+
+
+// ----------
+// - ZCodec -
+// ----------
+
+ZCodec::ZCodec( ULONG nInBufSize, ULONG nOutBufSize, ULONG nMemUsage )
+{
+ mnMemUsage = nMemUsage;
+ mnInBufSize = nInBufSize;
+ mnOutBufSize = nOutBufSize;
+ mpsC_Stream = new z_stream;
+}
+
+ZCodec::ZCodec( void )
+{
+ mnMemUsage = MAX_MEM_USAGE;
+ mnInBufSize = DEFAULT_IN_BUFSIZE;
+ mnOutBufSize = DEFAULT_OUT_BUFSIZE;
+ mpsC_Stream = new z_stream;
+}
+
+// ------------------------------------------------------------------------
+
+ZCodec::~ZCodec()
+{
+ delete (z_stream*) mpsC_Stream;
+}
+
+// ------------------------------------------------------------------------
+
+void ZCodec::BeginCompression( ULONG nCompressMethod )
+{
+ mbInit = 0;
+ mbStatus = TRUE;
+ mbFinish = FALSE;
+ mpIStm = mpOStm = NULL;
+ mnInToRead = 0xffffffff;
+ mpInBuf = mpOutBuf = NULL;
+ PZSTREAM->total_out = PZSTREAM->total_in = 0;
+ mnCompressMethod = nCompressMethod;
+ PZSTREAM->zalloc = ( alloc_func )0;
+ PZSTREAM->zfree = ( free_func )0;
+ PZSTREAM->opaque = ( voidpf )0;
+ PZSTREAM->avail_out = PZSTREAM->avail_in = 0;
+}
+
+// ------------------------------------------------------------------------
+
+long ZCodec::EndCompression()
+{
+ long retvalue;
+
+ if ( mbInit != 0 )
+ {
+ if ( mbInit & 2 ) // 1->decompress, 3->compress
+ {
+ do
+ {
+ ImplWriteBack();
+ }
+ while ( deflate( PZSTREAM, Z_FINISH ) != Z_STREAM_END );
+
+ ImplWriteBack();
+
+ retvalue = PZSTREAM->total_in;
+ deflateEnd( PZSTREAM );
+ }
+ else
+ {
+ retvalue = PZSTREAM->total_out;
+ inflateEnd( PZSTREAM );
+ }
+ delete[] mpOutBuf;
+ delete[] mpInBuf;
+ }
+ return ( mbStatus ) ? retvalue : -1;
+}
+
+
+// ------------------------------------------------------------------------
+
+long ZCodec::Compress( SvStream& rIStm, SvStream& rOStm )
+{
+ char err;
+ long nOldTotal_In = PZSTREAM->total_in;
+
+ if ( mbInit == 0 )
+ {
+ mpIStm = &rIStm;
+ mpOStm = &rOStm;
+ ImplInitBuf( FALSE );
+ mpInBuf = new BYTE[ mnInBufSize ];
+ }
+ while (( PZSTREAM->avail_in = mpIStm->Read( PZSTREAM->next_in = mpInBuf, mnInBufSize )) != 0 )
+ {
+ if ( PZSTREAM->avail_out == 0 )
+ ImplWriteBack();
+ err = deflate( PZSTREAM, Z_NO_FLUSH );
+ if ( err < 0 )
+ {
+ mbStatus = FALSE;
+ break;
+ }
+ };
+ return ( mbStatus ) ? PZSTREAM->total_in - nOldTotal_In : -1;
+}
+
+// ------------------------------------------------------------------------
+
+long ZCodec::Decompress( SvStream& rIStm, SvStream& rOStm )
+{
+ char err;
+ ULONG nInToRead;
+ long nOldTotal_Out = PZSTREAM->total_out;
+
+ if ( mbFinish )
+ return PZSTREAM->total_out - nOldTotal_Out;
+
+ if ( mbInit == 0 )
+ {
+ mpIStm = &rIStm;
+ mpOStm = &rOStm;
+ ImplInitBuf( TRUE );
+ PZSTREAM->next_out = mpOutBuf = new BYTE[ PZSTREAM->avail_out = mnOutBufSize ];
+ }
+ do
+ {
+ if ( PZSTREAM->avail_out == 0 ) ImplWriteBack();
+ if ( PZSTREAM->avail_in == 0 && mnInToRead )
+ {
+ nInToRead = ( mnInBufSize > mnInToRead ) ? mnInToRead : mnInBufSize;
+ PZSTREAM->avail_in = mpIStm->Read( PZSTREAM->next_in = mpInBuf, nInToRead );
+ mnInToRead -= nInToRead;
+
+ if ( mnCompressMethod & ZCODEC_UPDATE_CRC )
+ mnCRC = UpdateCRC( mnCRC, mpInBuf, nInToRead );
+
+ }
+ err = inflate( PZSTREAM, Z_NO_FLUSH );
+ if ( err < 0 )
+ {
+ mbStatus = FALSE;
+ break;
+ }
+
+ }
+ while ( ( err != Z_STREAM_END) && ( PZSTREAM->avail_in || mnInToRead ) );
+ ImplWriteBack();
+
+ if ( err == Z_STREAM_END )
+ mbFinish = TRUE;
+ return ( mbStatus ) ? PZSTREAM->total_out - nOldTotal_Out : -1;
+}
+
+// ------------------------------------------------------------------------
+
+long ZCodec::Write( SvStream& rOStm, const BYTE* pData, ULONG nSize )
+{
+ if ( mbInit == 0 )
+ {
+ mpOStm = &rOStm;
+ ImplInitBuf( FALSE );
+ }
+
+ PZSTREAM->avail_in = nSize;
+ PZSTREAM->next_in = (unsigned char*)pData;
+
+ while ( PZSTREAM->avail_in || ( PZSTREAM->avail_out == 0 ) )
+ {
+ if ( PZSTREAM->avail_out == 0 )
+ ImplWriteBack();
+
+ if ( deflate( PZSTREAM, Z_NO_FLUSH ) < 0 )
+ {
+ mbStatus = FALSE;
+ break;
+ }
+ }
+ return ( mbStatus ) ? nSize : -1;
+}
+
+// ------------------------------------------------------------------------
+
+long ZCodec::Read( SvStream& rIStm, BYTE* pData, ULONG nSize )
+{
+ char err;
+ ULONG nInToRead;
+
+ if ( mbFinish )
+ return 0; // PZSTREAM->total_out;
+
+ mpIStm = &rIStm;
+ if ( mbInit == 0 )
+ {
+ ImplInitBuf( TRUE );
+ }
+ PZSTREAM->avail_out = nSize;
+ PZSTREAM->next_out = pData;
+ do
+ {
+ if ( PZSTREAM->avail_in == 0 && mnInToRead )
+ {
+ nInToRead = (mnInBufSize > mnInToRead) ? mnInToRead : mnInBufSize;
+ PZSTREAM->avail_in = mpIStm->Read (
+ PZSTREAM->next_in = mpInBuf, nInToRead);
+ mnInToRead -= nInToRead;
+
+ if ( mnCompressMethod & ZCODEC_UPDATE_CRC )
+ mnCRC = UpdateCRC( mnCRC, mpInBuf, nInToRead );
+
+ }
+ err = inflate( PZSTREAM, Z_NO_FLUSH );
+ if ( err < 0 )
+ {
+ // Accept Z_BUF_ERROR as EAGAIN or EWOULDBLOCK.
+ mbStatus = (err == Z_BUF_ERROR);
+ break;
+ }
+ }
+ while ( (err != Z_STREAM_END) &&
+ (PZSTREAM->avail_out != 0) &&
+ (PZSTREAM->avail_in || mnInToRead) );
+ if ( err == Z_STREAM_END )
+ mbFinish = TRUE;
+
+ return (mbStatus ? nSize - PZSTREAM->avail_out : -1);
+}
+
+// ------------------------------------------------------------------------
+
+#pragma optimize ("",off)
+
+long ZCodec::ReadAsynchron( SvStream& rIStm, BYTE* pData, ULONG nSize )
+{
+ char err;
+ ULONG nInToRead;
+
+ if ( mbFinish )
+ return 0; // PZSTREAM->total_out;
+
+ if ( mbInit == 0 )
+ {
+ mpIStm = &rIStm;
+ ImplInitBuf( TRUE );
+ }
+ PZSTREAM->avail_out = nSize;
+ PZSTREAM->next_out = pData;
+ do
+ {
+ if ( PZSTREAM->avail_in == 0 && mnInToRead )
+ {
+ nInToRead = (mnInBufSize > mnInToRead) ? mnInToRead : mnInBufSize;
+
+ ULONG nStreamPos = rIStm.Tell();
+ rIStm.Seek( STREAM_SEEK_TO_END );
+ ULONG nMaxPos = rIStm.Tell();
+ rIStm.Seek( nStreamPos );
+ if ( ( nMaxPos - nStreamPos ) < nInToRead )
+ {
+ rIStm.SetError( ERRCODE_IO_PENDING );
+ break;
+ }
+
+ PZSTREAM->avail_in = mpIStm->Read (
+ PZSTREAM->next_in = mpInBuf, nInToRead);
+ mnInToRead -= nInToRead;
+
+ if ( mnCompressMethod & ZCODEC_UPDATE_CRC )
+ mnCRC = UpdateCRC( mnCRC, mpInBuf, nInToRead );
+
+ }
+ err = inflate( PZSTREAM, Z_NO_FLUSH );
+ if ( err < 0 )
+ {
+ // Accept Z_BUF_ERROR as EAGAIN or EWOULDBLOCK.
+ mbStatus = (err == Z_BUF_ERROR);
+ break;
+ }
+ }
+ while ( (err != Z_STREAM_END) &&
+ (PZSTREAM->avail_out != 0) &&
+ (PZSTREAM->avail_in || mnInToRead) );
+ if ( err == Z_STREAM_END )
+ mbFinish = TRUE;
+
+ return (mbStatus ? nSize - PZSTREAM->avail_out : -1);
+}
+
+#pragma optimize ("",on)
+
+// ------------------------------------------------------------------------
+
+void ZCodec::ImplWriteBack()
+{
+ ULONG nAvail = mnOutBufSize - PZSTREAM->avail_out;
+
+ if ( nAvail )
+ {
+ if ( mbInit & 2 && ( mnCompressMethod & ZCODEC_UPDATE_CRC ) )
+ mnCRC = UpdateCRC( mnCRC, mpOutBuf, nAvail );
+ mpOStm->Write( PZSTREAM->next_out = mpOutBuf, nAvail );
+ PZSTREAM->avail_out = mnOutBufSize;
+ }
+}
+
+// ------------------------------------------------------------------------
+
+void ZCodec::SetBreak( ULONG nInToRead )
+{
+ mnInToRead = nInToRead;
+}
+
+// ------------------------------------------------------------------------
+
+ULONG ZCodec::GetBreak( void )
+{
+ return ( mnInToRead + PZSTREAM->avail_in );
+}
+
+// ------------------------------------------------------------------------
+
+void ZCodec::SetCRC( ULONG nCRC )
+{
+ mnCRC = nCRC;
+}
+
+// ------------------------------------------------------------------------
+
+ULONG ZCodec::GetCRC()
+{
+ return mnCRC;
+}
+
+// ------------------------------------------------------------------------
+
+void ZCodec::ImplInitBuf ( BOOL nIOFlag )
+{
+ if ( mbInit == 0 )
+ {
+ if ( nIOFlag )
+ {
+ mbInit = 1;
+ if ( mbStatus && ( mnCompressMethod & ZCODEC_GZ_LIB ) )
+ {
+ BYTE n1, n2, j, nMethod, nFlags;
+ for ( int i = 0; i < 2; i++ ) // gz - magic number
+ {
+ *mpIStm >> j;
+ if ( j != gz_magic[ i ] )
+ mbStatus = FALSE;
+ }
+ *mpIStm >> nMethod;
+ *mpIStm >> nFlags;
+ if ( nMethod != Z_DEFLATED )
+ mbStatus = FALSE;
+ if ( ( nFlags & GZ_RESERVED ) != 0 )
+ mbStatus = FALSE;
+ /* Discard time, xflags and OS code: */
+ mpIStm->SeekRel( 6 );
+ /* skip the extra field */
+ if ( nFlags & GZ_EXTRA_FIELD )
+ {
+ *mpIStm >> n1 >> n2;
+ mpIStm->SeekRel( n1 + ( n2 << 8 ) );
+ }
+ /* skip the original file name */
+ if ( nFlags & GZ_ORIG_NAME)
+ {
+ do
+ {
+ *mpIStm >> j;
+ }
+ while ( j && !mpIStm->IsEof() );
+ }
+ /* skip the .gz file comment */
+ if ( nFlags & GZ_COMMENT )
+ {
+ do
+ {
+ *mpIStm >> j;
+ }
+ while ( j && !mpIStm->IsEof() );
+ }
+ /* skip the header crc */
+ if ( nFlags & GZ_HEAD_CRC )
+ mpIStm->SeekRel( 2 );
+ if ( mbStatus )
+ mbStatus = ( inflateInit2( PZSTREAM, -MAX_WBITS) != Z_OK ) ? FALSE : TRUE;
+ }
+ else
+ {
+ mbStatus = ( inflateInit( PZSTREAM ) >= 0 );
+ }
+ mpInBuf = new BYTE[ mnInBufSize ];
+ }
+ else
+ {
+ mbInit = 3;
+
+ mbStatus = ( deflateInit2_( PZSTREAM, mnCompressMethod & 0xff, Z_DEFLATED,
+ MAX_WBITS, mnMemUsage, ( mnCompressMethod >> 8 ) & 0xff,
+ ZLIB_VERSION, sizeof( z_stream ) ) >= 0 );
+
+ PZSTREAM->next_out = mpOutBuf = new BYTE[ PZSTREAM->avail_out = mnOutBufSize ];
+ }
+ }
+}
+
+// ------------------------------------------------------------------------
+
+ULONG ZCodec::UpdateCRC ( ULONG nLatestCRC, ULONG nNumber )
+{
+
+#ifdef __LITTLEENDIAN
+ nNumber = SWAPLONG( nNumber );
+#endif
+ return rtl_crc32( nLatestCRC, &nNumber, 4 );
+}
+
+// ------------------------------------------------------------------------
+
+ULONG ZCodec::UpdateCRC ( ULONG nLatestCRC, BYTE* pSource, long nDatSize)
+{
+ return rtl_crc32( nLatestCRC, pSource, nDatSize );
+}
+
+// ------------------------------------------------------------------------
+
+void GZCodec::BeginCompression( ULONG nCompressMethod )
+{
+ ZCodec::BeginCompression( nCompressMethod | ZCODEC_GZ_LIB );
+};
+
+
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