git.ozlabs.org Git - ccan/blob - ccan/str/test/compile_fail-isdigit.c

   1 #define CCAN_STR_DEBUG 1
   2 #include <ccan/str/str.h>
   3
   4 int main(int argc, char *argv[])
   5 {
   6         (void)argc;
   7 #ifdef FAIL
   8 #if !HAVE_BUILTIN_TYPES_COMPATIBLE_P || !HAVE_TYPEOF
   9 #error We need typeof to check isdigit.
  10 #endif
  11         char
  12 #else
  13         unsigned char
  14 #endif
  15                 c = argv[0][0];
  16
  17 #ifdef FAIL
  18         /* Fake fail on unsigned char platforms. */
  19         BUILD_ASSERT((char)255 < 0);
  20 #endif
  21
  22         return isdigit(c);
  23 }