Commit bb383e22 authored by Dick Hollenbeck's avatar Dick Hollenbeck

optimize isSpace for negative 8 bit bytes

parent 56796a95
......@@ -375,7 +375,9 @@ int DSNLEXER::NeedNUMBER( const char* aExpectation ) throw( IO_ERROR )
*/
static bool isSpace( int cc )
{
if( cc <= ' ' )
// cc was signed extended from signed char, so it is often negative.
// Treat negative as large positive to exclude rapidly.
if( unsigned( cc ) <= ' ' )
{
switch( cc )
{
......
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