Unsigned char logical operations

[Duane Ellis]

GCC 2.95.2, configured as follows:

Linux, Red Hat 6.1 (Intel i686)

tar xfz gcc-2.95.2.tar.gz
cd gcc-2.95.2
./configure [see output of config.status below]
make
make install

cat config.status, shows this:

./configure --with-gcc-version-trigger=/nbu/ereader/duane/gcc-2.95.2/gcc/version.c --host=i686-pc-linux-gnu --prefix=/nbu/ereader/duane/install --norecursion 

Any questions, please contact me.

Thanks, 

--Duane.


This small piece of code reports the wrong values.
--------------------------------------------------
 
/* Assumes ASCII char set, */
typedef unsigned char U8;

#define MY_BIT  0x08

U8 data[ 16 ];
char string[10];

static void
do_char( char *str, int i, int flag, int ch )
{
	if( flag ){
		str[i] = ch + 0x20; /* capitalize it */
	} else {
		str[i] = ch;
	}
}

int
main( int argc, char **argv )
{
	int indx;
	int x;

	/* BUG BUG BUG BUG */
	x = 0;
	indx = 3;
	data[ indx ] = 0x0ff;

	do_char( string, x, data[ indx ] & MY_BIT, 'd' );

	string[1] = 0;
	printf("Result is: %s\n", string );
	/* Should print 'D' */

	/* THIS VERSION IS OK */
	x = 0;
	indx = 3;
	data[ indx ] = 0x000;

	do_char( string, x, data[ indx ] & MY_BIT, 'd' );

	string[1] = 0;
	printf("Result is: %s\n", string );
	/* should print 'd' */


}