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#define _FILE_OFFSET_BITS 64
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <time.h> /* for time_t */
#include <sys/types.h> /* for off_t */
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
#define TYPE_MAX(t) \
((t) (! TYPE_SIGNED (t) \
? (t) -1 \
: ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
int main(void)
{
uint32_t uint32=0xffffFFFF;
uint64_t uint64=0xFFFFFFFFFFFFFFFFLL;
int32_t int32=0x7fffffff;
int64_t int64=0x7fffFFFFffffFFFFLL;
off_t offset=TYPE_MAX(off_t); /* Depends on _FILE_OFFSET_BITS */
size_t size=TYPE_MAX(size_t); /* Depends on int size */
printf("uint32_t max %20"PRIu32" %16"PRIx32"\n"
"uint64_t max %20"PRIu64" %16"PRIx64"\n"
"int32_t max %20"PRId32" %16"PRIx32"\n"
"int64_t max %20"PRId64" %16"PRIx64"\n"
"off_t max %20jd %16jx\n" /* try PRIdMAX if %jd unsupported */
"size_t max %20zu %16zx\n",
uint32, uint32,
uint64, uint64,
int32, int32,
int64, int64,
(intmax_t)offset, (intmax_t)offset,
size, size);
return 0;
}
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