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/** Tests argument passing to functions via va_args.
Assumes that up to the first two arguments can be passed in registers.
type1: va_char, int
type2: va_char, int
type3: va_char, int
*/
#include <testfwk.h>
#include <stdarg.h>
/* gcc 3.3 throws a warning, if char is in '...' */
#if defined(PORT_HOST)
# define va_char int
#else
# define va_char char
#endif
static {type1}
returnFirstArg(int marker, ...)
{
va_list ap;
{type1} i;
va_start(ap, marker);
i = va_arg(ap, {type1});
va_end(ap);
LOG(("Returning %u\n", i));
return i;
}
static {type2}
returnSecondArg(int marker, ...)
{
va_list ap;
{type2} i;
va_start(ap, marker);
UNUSED(va_arg(ap, {type1}));
i = va_arg(ap, {type2});
va_end(ap);
LOG(("Returning %u\n", i));
return i;
}
static {type3}
returnThirdArg(int marker, ...)
{
va_list ap;
{type3} i;
va_start(ap, marker);
UNUSED(va_arg(ap, {type1}));
UNUSED(va_arg(ap, {type2}));
i = va_arg(ap, {type3});
va_end(ap);
LOG(("Returning %u\n", i));
return i;
}
void
testArgs(void)
{
int marker = 12;
LOG(("First arg: %u\n", returnFirstArg(marker, ({type1})123, ({type2})45, ({type3})67)));
ASSERT(returnFirstArg(marker, ({type1})123, ({type2})45, ({type3})67) == 123);
ASSERT(returnFirstArg(marker, ({type1})-123, ({type2})45, ({type3})67) == -123);
ASSERT(returnSecondArg(marker, ({type1})1, ({type2})-23, ({type3})64) == -23);
ASSERT(returnSecondArg(marker, ({type1})1, ({type2})8, ({type3})64) == 8);
ASSERT(returnThirdArg(marker, ({type1})-33, ({type2})-34, ({type3})-35) == -35);
ASSERT(returnThirdArg(marker, ({type1})-33, ({type2})-34, ({type3})35) == 35);
}
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