changed size to a bigint

1 files changed, 32 insertions, 0 deletions

diff --git a/tests/testtypes.c b/tests/testtypes.c
new file mode 100644
index 0000000..339af5d
--- /dev/null
+++ b/tests/testtypes.c
@@ -0,0 +1,32 @@
+#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=0xFFFFFFFFFFFFFFFF;
+    off_t offset=TYPE_MAX(off_t); /* Depends on _FILE_OFFSET_BITS */
+    size_t size=TYPE_MAX(size_t); /* Depends on int size */
+
+    printf("native int bits%20u %16x\n", sizeof(int)*CHAR_BIT, UINT_MAX);
+    printf("uint32_t max   %20"PRIu32" %16"PRIx32"\n"
+           "uint64_t max   %20"PRIu64" %16"PRIx64"\n"
+           "off_t max      %20jd %16jx\n" /* try PRIdMAX if %jd unsupported */
+           "size_t max     %20zu %16zx\n",
+           uint32, uint32,
+           uint64, uint64,
+           (intmax_t)offset, (intmax_t)offset,
+           size, size);
+
+    return 0;
+}