nMemUsage is always MAX_MEM_USAGE

...so just use zlib.h's MAX_MEM_LEVEL directly.

Change-Id: I76d73f665df242bfb180b76aa7054cf8ddbe9e67

include/tools/zcodec.hxx

@@ -27,8 +27,6 @@
 #define DEFAULT_IN_BUFSIZE          (0x00008000UL)
 #define DEFAULT_OUT_BUFSIZE         (0x00008000UL)
 
-#define MAX_MEM_USAGE 8
-
 // memory requirement using compress:
 //  [ INBUFFER ] + [ OUTBUFFER ] + 128KB + 1 << (MEM_USAGE+9)
 // memory requirement using decompress:
@@ -57,7 +55,6 @@ private:
     sal_uIntPtr     mbInit;
     bool            mbStatus;
     bool            mbFinish;
-    sal_uIntPtr     mnMemUsage;
     SvStream*       mpIStm;
     sal_uInt8*      mpInBuf;
     sal_uIntPtr     mnInBufSize;
@@ -74,7 +71,7 @@ private:
     void            ImplWriteBack();
 
 public:
-                    ZCodec( sal_uIntPtr nInBuf = DEFAULT_IN_BUFSIZE, sal_uIntPtr nOutBuf = DEFAULT_OUT_BUFSIZE, sal_uIntPtr nMemUsage = MAX_MEM_USAGE );
+                    ZCodec( sal_uIntPtr nInBuf = DEFAULT_IN_BUFSIZE, sal_uIntPtr nOutBuf = DEFAULT_OUT_BUFSIZE );
     virtual         ~ZCodec();
 
     virtual void    BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT );

tools/source/zcodec/zcodec.cxx

@@ -37,11 +37,10 @@
 
 static const int gz_magic[2] = { 0x1f, 0x8b }; /* gzip magic header */
 
-ZCodec::ZCodec( sal_uIntPtr nInBufSize, sal_uIntPtr nOutBufSize, sal_uIntPtr nMemUsage )
+ZCodec::ZCodec( sal_uIntPtr nInBufSize, sal_uIntPtr nOutBufSize )
     : mbInit(0)
     , mbStatus(false)
     , mbFinish(false)
-    , mnMemUsage(nMemUsage)
     , mpIStm(NULL)
     , mpInBuf(NULL)
     , mnInBufSize(nInBufSize)
@@ -397,7 +396,7 @@ void ZCodec::ImplInitBuf ( bool nIOFlag )
             mbInit = 3;
 
             mbStatus = ( deflateInit2_( PZSTREAM, mnCompressMethod & 0xff, Z_DEFLATED,
-                MAX_WBITS, mnMemUsage, ( mnCompressMethod >> 8 ) & 0xff,
+                MAX_WBITS, MAX_MEM_LEVEL, ( mnCompressMethod >> 8 ) & 0xff,
                     ZLIB_VERSION, sizeof( z_stream ) ) >= 0 );
 
             PZSTREAM->next_out = mpOutBuf = new sal_uInt8[ PZSTREAM->avail_out = mnOutBufSize ];