coverity#1240260 Operands don't affect result

see can we silence these false positives

coverity#1240259 Operands don't affect result
coverity#1240254 Operands don't affect result
coverity#1240264 Operands don't affect result
coverity#1240267 Operands don't affect result

Change-Id: Ieca40474c231e33a516b70f7693346ac73babd61

sal/osl/unx/file.cxx

@@ -1110,8 +1110,7 @@ SAL_CALL osl_mapFile (
         return osl_File_E_INVAL;
     *ppAddr = 0;
 
-    static sal_uInt64 const g_limit_size_t = std::numeric_limits< size_t >::max();
-    if (g_limit_size_t < uLength)
+    if (uLength > SAL_MAX_SIZE)
         return osl_File_E_OVERFLOW;
     size_t const nLength = sal::static_int_cast< size_t >(uLength);
 
@@ -1190,8 +1189,7 @@ unmapFile (void* pAddr, sal_uInt64 uLength)
     if (0 == pAddr)
         return osl_File_E_INVAL;
 
-    static sal_uInt64 const g_limit_size_t = std::numeric_limits< size_t >::max();
-    if (g_limit_size_t < uLength)
+    if (uLength > SAL_MAX_SIZE)
         return osl_File_E_OVERFLOW;
     size_t const nLength = sal::static_int_cast< size_t >(uLength);
 

tools/source/generic/config.cxx

@@ -104,7 +104,7 @@ static sal_uInt8* ImplSysReadConfig( const OUString& rFileName,
         sal_uInt64 nPos = 0;
         if( aFile.getSize( nPos ) == ::osl::FileBase::E_None )
         {
-            if (nPos > std::numeric_limits< std::size_t >::max()) {
+            if (nPos > SAL_MAX_SIZE) {
                 aFile.close();
                 return 0;
             }

writerperfect/source/common/WPXSvInputStream.cxx

@@ -504,7 +504,7 @@ long WPXSvInputStreamImpl::tell()
     else
     {
         sal_Int64 tmpPosition = mxSeekable->getPosition();
-        if ((tmpPosition < 0) || (tmpPosition > (std::numeric_limits<long>::max)()))
+        if ((tmpPosition < 0) || (tmpPosition > LONG_MAX))
             return -1L;
         return (long)tmpPosition;
     }
@@ -516,7 +516,7 @@ int WPXSvInputStreamImpl::seek(long offset)
         return -1;
 
     sal_Int64 tmpPosition = mxSeekable->getPosition();
-    if ((tmpPosition < 0) || (tmpPosition > (std::numeric_limits<long>::max)()))
+    if ((tmpPosition < 0) || (tmpPosition > LONG_MAX))
         return -1;
 
     try