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See the 18*cdf0e10cSrcweir * GNU Lesser General Public License version 3 for more details 19*cdf0e10cSrcweir * (a copy is included in the LICENSE file that accompanied this code). 20*cdf0e10cSrcweir * 21*cdf0e10cSrcweir * You should have received a copy of the GNU Lesser General Public License 22*cdf0e10cSrcweir * version 3 along with OpenOffice.org. If not, see 23*cdf0e10cSrcweir * <http://www.openoffice.org/license.html> 24*cdf0e10cSrcweir * for a copy of the LGPLv3 License. 25*cdf0e10cSrcweir * 26*cdf0e10cSrcweir ************************************************************************/ 27*cdf0e10cSrcweir 28*cdf0e10cSrcweir // MARKER(update_precomp.py): autogen include statement, do not remove 29*cdf0e10cSrcweir #include "precompiled_package.hxx" 30*cdf0e10cSrcweir #include <Deflater.hxx> 31*cdf0e10cSrcweir #ifndef _ZLIB_H 32*cdf0e10cSrcweir #ifdef SYSTEM_ZLIB 33*cdf0e10cSrcweir #include <zlib.h> 34*cdf0e10cSrcweir #else 35*cdf0e10cSrcweir #include <external/zlib/zlib.h> 36*cdf0e10cSrcweir #endif 37*cdf0e10cSrcweir #endif 38*cdf0e10cSrcweir #include <com/sun/star/packages/zip/ZipConstants.hpp> 39*cdf0e10cSrcweir #include <string.h> // for memset 40*cdf0e10cSrcweir 41*cdf0e10cSrcweir using namespace com::sun::star::packages::zip::ZipConstants; 42*cdf0e10cSrcweir using namespace com::sun::star; 43*cdf0e10cSrcweir 44*cdf0e10cSrcweir /** Provides general purpose compression using the ZLIB compression 45*cdf0e10cSrcweir * library. 46*cdf0e10cSrcweir */ 47*cdf0e10cSrcweir 48*cdf0e10cSrcweir Deflater::~Deflater(void) 49*cdf0e10cSrcweir { 50*cdf0e10cSrcweir end(); 51*cdf0e10cSrcweir } 52*cdf0e10cSrcweir void Deflater::init (sal_Int32 nLevelArg, sal_Int32 nStrategyArg, sal_Bool bNowrap) 53*cdf0e10cSrcweir { 54*cdf0e10cSrcweir pStream = new z_stream; 55*cdf0e10cSrcweir /* Memset it to 0...sets zalloc/zfree/opaque to NULL */ 56*cdf0e10cSrcweir memset (pStream, 0, sizeof(*pStream)); 57*cdf0e10cSrcweir 58*cdf0e10cSrcweir switch (deflateInit2(pStream, nLevelArg, Z_DEFLATED, bNowrap? -MAX_WBITS : MAX_WBITS, 59*cdf0e10cSrcweir DEF_MEM_LEVEL, nStrategyArg)) 60*cdf0e10cSrcweir { 61*cdf0e10cSrcweir case Z_OK: 62*cdf0e10cSrcweir break; 63*cdf0e10cSrcweir case Z_MEM_ERROR: 64*cdf0e10cSrcweir delete pStream; 65*cdf0e10cSrcweir break; 66*cdf0e10cSrcweir case Z_STREAM_ERROR: 67*cdf0e10cSrcweir delete pStream; 68*cdf0e10cSrcweir break; 69*cdf0e10cSrcweir default: 70*cdf0e10cSrcweir break; 71*cdf0e10cSrcweir } 72*cdf0e10cSrcweir } 73*cdf0e10cSrcweir 74*cdf0e10cSrcweir Deflater::Deflater(sal_Int32 nSetLevel, sal_Bool bNowrap) 75*cdf0e10cSrcweir : bFinish(sal_False) 76*cdf0e10cSrcweir , bFinished(sal_False) 77*cdf0e10cSrcweir , bSetParams(sal_False) 78*cdf0e10cSrcweir , nLevel(nSetLevel) 79*cdf0e10cSrcweir , nStrategy(DEFAULT_STRATEGY) 80*cdf0e10cSrcweir , nOffset(0) 81*cdf0e10cSrcweir , nLength(0) 82*cdf0e10cSrcweir { 83*cdf0e10cSrcweir init(nSetLevel, DEFAULT_STRATEGY, bNowrap); 84*cdf0e10cSrcweir } 85*cdf0e10cSrcweir 86*cdf0e10cSrcweir sal_Int32 Deflater::doDeflateBytes (uno::Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength) 87*cdf0e10cSrcweir { 88*cdf0e10cSrcweir sal_Int32 nResult; 89*cdf0e10cSrcweir if (bSetParams) 90*cdf0e10cSrcweir { 91*cdf0e10cSrcweir pStream->next_in = (unsigned char*) sInBuffer.getConstArray() + nOffset; 92*cdf0e10cSrcweir pStream->next_out = (unsigned char*) rBuffer.getArray()+nNewOffset; 93*cdf0e10cSrcweir pStream->avail_in = nLength; 94*cdf0e10cSrcweir pStream->avail_out = nNewLength; 95*cdf0e10cSrcweir 96*cdf0e10cSrcweir #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX 97*cdf0e10cSrcweir nResult = deflateParams(pStream, nLevel, nStrategy); 98*cdf0e10cSrcweir #else 99*cdf0e10cSrcweir nResult = z_deflateParams(pStream, nLevel, nStrategy); 100*cdf0e10cSrcweir #endif 101*cdf0e10cSrcweir switch (nResult) 102*cdf0e10cSrcweir { 103*cdf0e10cSrcweir case Z_OK: 104*cdf0e10cSrcweir bSetParams = sal_False; 105*cdf0e10cSrcweir nOffset += nLength - pStream->avail_in; 106*cdf0e10cSrcweir nLength = pStream->avail_in; 107*cdf0e10cSrcweir return nNewLength - pStream->avail_out; 108*cdf0e10cSrcweir case Z_BUF_ERROR: 109*cdf0e10cSrcweir bSetParams = sal_False; 110*cdf0e10cSrcweir return 0; 111*cdf0e10cSrcweir default: 112*cdf0e10cSrcweir return 0; 113*cdf0e10cSrcweir } 114*cdf0e10cSrcweir } 115*cdf0e10cSrcweir else 116*cdf0e10cSrcweir { 117*cdf0e10cSrcweir pStream->next_in = (unsigned char*) sInBuffer.getConstArray() + nOffset; 118*cdf0e10cSrcweir pStream->next_out = (unsigned char*) rBuffer.getArray()+nNewOffset; 119*cdf0e10cSrcweir pStream->avail_in = nLength; 120*cdf0e10cSrcweir pStream->avail_out = nNewLength; 121*cdf0e10cSrcweir 122*cdf0e10cSrcweir #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX 123*cdf0e10cSrcweir nResult = deflate(pStream, bFinish ? Z_FINISH : Z_NO_FLUSH); 124*cdf0e10cSrcweir #else 125*cdf0e10cSrcweir nResult = z_deflate(pStream, bFinish ? Z_FINISH : Z_NO_FLUSH); 126*cdf0e10cSrcweir #endif 127*cdf0e10cSrcweir switch (nResult) 128*cdf0e10cSrcweir { 129*cdf0e10cSrcweir case Z_STREAM_END: 130*cdf0e10cSrcweir bFinished = sal_True; 131*cdf0e10cSrcweir case Z_OK: 132*cdf0e10cSrcweir nOffset += nLength - pStream->avail_in; 133*cdf0e10cSrcweir nLength = pStream->avail_in; 134*cdf0e10cSrcweir return nNewLength - pStream->avail_out; 135*cdf0e10cSrcweir case Z_BUF_ERROR: 136*cdf0e10cSrcweir bSetParams = sal_False; 137*cdf0e10cSrcweir return 0; 138*cdf0e10cSrcweir default: 139*cdf0e10cSrcweir return 0; 140*cdf0e10cSrcweir } 141*cdf0e10cSrcweir } 142*cdf0e10cSrcweir } 143*cdf0e10cSrcweir 144*cdf0e10cSrcweir void SAL_CALL Deflater::setInputSegment( const uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength ) 145*cdf0e10cSrcweir { 146*cdf0e10cSrcweir OSL_ASSERT( !(nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())); 147*cdf0e10cSrcweir 148*cdf0e10cSrcweir sInBuffer = rBuffer; 149*cdf0e10cSrcweir nOffset = nNewOffset; 150*cdf0e10cSrcweir nLength = nNewLength; 151*cdf0e10cSrcweir } 152*cdf0e10cSrcweir void SAL_CALL Deflater::setLevel( sal_Int32 nNewLevel ) 153*cdf0e10cSrcweir { 154*cdf0e10cSrcweir if ((nNewLevel < 0 || nNewLevel > 9) && nNewLevel != DEFAULT_COMPRESSION) 155*cdf0e10cSrcweir { 156*cdf0e10cSrcweir // do error handling 157*cdf0e10cSrcweir } 158*cdf0e10cSrcweir if (nNewLevel != nLevel) 159*cdf0e10cSrcweir { 160*cdf0e10cSrcweir nLevel = nNewLevel; 161*cdf0e10cSrcweir bSetParams = sal_True; 162*cdf0e10cSrcweir } 163*cdf0e10cSrcweir } 164*cdf0e10cSrcweir sal_Bool SAL_CALL Deflater::needsInput( ) 165*cdf0e10cSrcweir { 166*cdf0e10cSrcweir return nLength <=0; 167*cdf0e10cSrcweir } 168*cdf0e10cSrcweir void SAL_CALL Deflater::finish( ) 169*cdf0e10cSrcweir { 170*cdf0e10cSrcweir bFinish = sal_True; 171*cdf0e10cSrcweir } 172*cdf0e10cSrcweir sal_Bool SAL_CALL Deflater::finished( ) 173*cdf0e10cSrcweir { 174*cdf0e10cSrcweir return bFinished; 175*cdf0e10cSrcweir } 176*cdf0e10cSrcweir sal_Int32 SAL_CALL Deflater::doDeflateSegment( uno::Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength ) 177*cdf0e10cSrcweir { 178*cdf0e10cSrcweir OSL_ASSERT( !(nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())); 179*cdf0e10cSrcweir return doDeflateBytes(rBuffer, nNewOffset, nNewLength); 180*cdf0e10cSrcweir } 181*cdf0e10cSrcweir sal_Int32 SAL_CALL Deflater::getTotalIn( ) 182*cdf0e10cSrcweir { 183*cdf0e10cSrcweir return pStream->total_in; 184*cdf0e10cSrcweir } 185*cdf0e10cSrcweir sal_Int32 SAL_CALL Deflater::getTotalOut( ) 186*cdf0e10cSrcweir { 187*cdf0e10cSrcweir return pStream->total_out; 188*cdf0e10cSrcweir } 189*cdf0e10cSrcweir void SAL_CALL Deflater::reset( ) 190*cdf0e10cSrcweir { 191*cdf0e10cSrcweir #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIXB 192*cdf0e10cSrcweir deflateReset(pStream); 193*cdf0e10cSrcweir #else 194*cdf0e10cSrcweir z_deflateReset(pStream); 195*cdf0e10cSrcweir #endif 196*cdf0e10cSrcweir bFinish = sal_False; 197*cdf0e10cSrcweir bFinished = sal_False; 198*cdf0e10cSrcweir nOffset = nLength = 0; 199*cdf0e10cSrcweir } 200*cdf0e10cSrcweir void SAL_CALL Deflater::end( ) 201*cdf0e10cSrcweir { 202*cdf0e10cSrcweir if (pStream != NULL) 203*cdf0e10cSrcweir { 204*cdf0e10cSrcweir #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX 205*cdf0e10cSrcweir deflateEnd(pStream); 206*cdf0e10cSrcweir #else 207*cdf0e10cSrcweir z_deflateEnd(pStream); 208*cdf0e10cSrcweir #endif 209*cdf0e10cSrcweir delete pStream; 210*cdf0e10cSrcweir } 211*cdf0e10cSrcweir pStream = NULL; 212*cdf0e10cSrcweir } 213