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/** bug-3814.c: A z80 codegen error that resulted in off-by one bugs in some unsigned char comparisons on big-endian hosts.
isxdigit from the standard library was affected.
*/
#include <testfwk.h>
#include <ctype.h>
void testisxdigit(void)
{
ASSERT(isxdigit('0'));
ASSERT(isxdigit('9'));
ASSERT(!isxdigit(':'));
ASSERT(isxdigit('a'));
ASSERT(isxdigit('f'));
ASSERT(!isxdigit('g'));
ASSERT(isxdigit('A'));
ASSERT(isxdigit('F'));
ASSERT(!isxdigit('G'));
}
_Bool compare(unsigned char c);
volatile char g;
void testBug(void)
{
g = 39;
ASSERT(compare(g));
g = 40;
ASSERT(!compare(g));
}
_Bool compare(unsigned char c)
{
return(c <= 39); // less-or-equal comparison with literal <= 255 onright side, and unsigned char on the left side was affected by an off-by-onebug on big-endian hosts.
}
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