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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 <Inflater.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 <string.h> // for memset 39*cdf0e10cSrcweir 40*cdf0e10cSrcweir using namespace com::sun::star::uno; 41*cdf0e10cSrcweir 42*cdf0e10cSrcweir /** Provides general purpose decompression using the ZLIB library */ 43*cdf0e10cSrcweir 44*cdf0e10cSrcweir Inflater::Inflater(sal_Bool bNoWrap) 45*cdf0e10cSrcweir : bFinished(sal_False), 46*cdf0e10cSrcweir bSetParams(sal_False), 47*cdf0e10cSrcweir bNeedDict(sal_False), 48*cdf0e10cSrcweir nOffset(0), 49*cdf0e10cSrcweir nLength(0), 50*cdf0e10cSrcweir nLastInflateError(0), 51*cdf0e10cSrcweir pStream(NULL) 52*cdf0e10cSrcweir { 53*cdf0e10cSrcweir pStream = new z_stream; 54*cdf0e10cSrcweir /* memset to 0 to set zalloc/opaque etc */ 55*cdf0e10cSrcweir memset (pStream, 0, sizeof(*pStream)); 56*cdf0e10cSrcweir sal_Int32 nRes; 57*cdf0e10cSrcweir nRes = inflateInit2(pStream, bNoWrap ? -MAX_WBITS : MAX_WBITS); 58*cdf0e10cSrcweir switch (nRes) 59*cdf0e10cSrcweir { 60*cdf0e10cSrcweir case Z_OK: 61*cdf0e10cSrcweir break; 62*cdf0e10cSrcweir case Z_MEM_ERROR: 63*cdf0e10cSrcweir delete pStream; 64*cdf0e10cSrcweir break; 65*cdf0e10cSrcweir case Z_STREAM_ERROR: 66*cdf0e10cSrcweir delete pStream; 67*cdf0e10cSrcweir break; 68*cdf0e10cSrcweir default: 69*cdf0e10cSrcweir break; 70*cdf0e10cSrcweir } 71*cdf0e10cSrcweir } 72*cdf0e10cSrcweir 73*cdf0e10cSrcweir Inflater::~Inflater() 74*cdf0e10cSrcweir { 75*cdf0e10cSrcweir end(); 76*cdf0e10cSrcweir } 77*cdf0e10cSrcweir 78*cdf0e10cSrcweir void SAL_CALL Inflater::setInput( const Sequence< sal_Int8 >& rBuffer ) 79*cdf0e10cSrcweir { 80*cdf0e10cSrcweir sInBuffer = rBuffer; 81*cdf0e10cSrcweir nOffset = 0; 82*cdf0e10cSrcweir nLength = rBuffer.getLength(); 83*cdf0e10cSrcweir } 84*cdf0e10cSrcweir 85*cdf0e10cSrcweir sal_Bool SAL_CALL Inflater::needsDictionary( ) 86*cdf0e10cSrcweir { 87*cdf0e10cSrcweir return bNeedDict; 88*cdf0e10cSrcweir } 89*cdf0e10cSrcweir 90*cdf0e10cSrcweir sal_Bool SAL_CALL Inflater::finished( ) 91*cdf0e10cSrcweir { 92*cdf0e10cSrcweir return bFinished; 93*cdf0e10cSrcweir } 94*cdf0e10cSrcweir 95*cdf0e10cSrcweir sal_Int32 SAL_CALL Inflater::doInflateSegment( Sequence< sal_Int8 >& rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength ) 96*cdf0e10cSrcweir { 97*cdf0e10cSrcweir if (nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength()) 98*cdf0e10cSrcweir { 99*cdf0e10cSrcweir // do error handling 100*cdf0e10cSrcweir } 101*cdf0e10cSrcweir return doInflateBytes(rBuffer, nNewOffset, nNewLength); 102*cdf0e10cSrcweir } 103*cdf0e10cSrcweir 104*cdf0e10cSrcweir void SAL_CALL Inflater::end( ) 105*cdf0e10cSrcweir { 106*cdf0e10cSrcweir if (pStream != NULL) 107*cdf0e10cSrcweir { 108*cdf0e10cSrcweir #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX 109*cdf0e10cSrcweir inflateEnd(pStream); 110*cdf0e10cSrcweir #else 111*cdf0e10cSrcweir z_inflateEnd(pStream); 112*cdf0e10cSrcweir #endif 113*cdf0e10cSrcweir delete pStream; 114*cdf0e10cSrcweir } 115*cdf0e10cSrcweir pStream = NULL; 116*cdf0e10cSrcweir } 117*cdf0e10cSrcweir 118*cdf0e10cSrcweir sal_Int32 Inflater::doInflateBytes (Sequence < sal_Int8 > &rBuffer, sal_Int32 nNewOffset, sal_Int32 nNewLength) 119*cdf0e10cSrcweir { 120*cdf0e10cSrcweir if ( !pStream ) 121*cdf0e10cSrcweir { 122*cdf0e10cSrcweir nLastInflateError = Z_STREAM_ERROR; 123*cdf0e10cSrcweir return 0; 124*cdf0e10cSrcweir } 125*cdf0e10cSrcweir 126*cdf0e10cSrcweir nLastInflateError = 0; 127*cdf0e10cSrcweir 128*cdf0e10cSrcweir pStream->next_in = ( unsigned char* ) ( sInBuffer.getConstArray() + nOffset ); 129*cdf0e10cSrcweir pStream->avail_in = nLength; 130*cdf0e10cSrcweir pStream->next_out = reinterpret_cast < unsigned char* > ( rBuffer.getArray() + nNewOffset ); 131*cdf0e10cSrcweir pStream->avail_out = nNewLength; 132*cdf0e10cSrcweir 133*cdf0e10cSrcweir #if defined SYSTEM_ZLIB || !defined ZLIB_PREFIX 134*cdf0e10cSrcweir sal_Int32 nResult = ::inflate(pStream, Z_PARTIAL_FLUSH); 135*cdf0e10cSrcweir #else 136*cdf0e10cSrcweir sal_Int32 nResult = ::z_inflate(pStream, Z_PARTIAL_FLUSH); 137*cdf0e10cSrcweir #endif 138*cdf0e10cSrcweir 139*cdf0e10cSrcweir switch (nResult) 140*cdf0e10cSrcweir { 141*cdf0e10cSrcweir case Z_STREAM_END: 142*cdf0e10cSrcweir bFinished = sal_True; 143*cdf0e10cSrcweir case Z_OK: 144*cdf0e10cSrcweir nOffset += nLength - pStream->avail_in; 145*cdf0e10cSrcweir nLength = pStream->avail_in; 146*cdf0e10cSrcweir return nNewLength - pStream->avail_out; 147*cdf0e10cSrcweir 148*cdf0e10cSrcweir case Z_NEED_DICT: 149*cdf0e10cSrcweir bNeedDict = sal_True; 150*cdf0e10cSrcweir nOffset += nLength - pStream->avail_in; 151*cdf0e10cSrcweir nLength = pStream->avail_in; 152*cdf0e10cSrcweir return 0; 153*cdf0e10cSrcweir 154*cdf0e10cSrcweir default: 155*cdf0e10cSrcweir // it is no error, if there is no input or no output 156*cdf0e10cSrcweir if ( nLength && nNewLength ) 157*cdf0e10cSrcweir nLastInflateError = nResult; 158*cdf0e10cSrcweir } 159*cdf0e10cSrcweir 160*cdf0e10cSrcweir return 0; 161*cdf0e10cSrcweir } 162*cdf0e10cSrcweir 163