gcc/testsuite/gcc.dg/limits-width-1.c

   1 /* Test TS 18661-1 width macros in <limits.h>.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-std=c11" } */
   4
   5 #define __STDC_WANT_IEC_60559_BFP_EXT__
   6 #include <limits.h>
   7
   8 #define CHECK_WIDTH(TYPE, MAX, WIDTH)                                   \
   9   _Static_assert ((MAX >> ((TYPE) -1 < 0 ? (WIDTH - 2) : (WIDTH - 1))) == 1, \
  10                   "width must match type")
  11
  12 #ifndef CHAR_WIDTH
  13 # error "missing CHAR_WIDTH"
  14 #endif
  15 CHECK_WIDTH (char, CHAR_MAX, CHAR_WIDTH);
  16 #ifndef SCHAR_WIDTH
  17 # error "missing SCHAR_WIDTH"
  18 #endif
  19 CHECK_WIDTH (signed char, SCHAR_MAX, SCHAR_WIDTH);
  20 #ifndef UCHAR_WIDTH
  21 # error "missing UCHAR_WIDTH"
  22 #endif
  23 CHECK_WIDTH (unsigned char, UCHAR_MAX, UCHAR_WIDTH);
  24 #ifndef SHRT_WIDTH
  25 # error "missing SHRT_WIDTH"
  26 #endif
  27 CHECK_WIDTH (signed short, SHRT_MAX, SHRT_WIDTH);
  28 #ifndef USHRT_WIDTH
  29 # error "missing USHRT_WIDTH"
  30 #endif
  31 CHECK_WIDTH (unsigned short, USHRT_MAX, USHRT_WIDTH);
  32 #ifndef INT_WIDTH
  33 # error "missing INT_WIDTH"
  34 #endif
  35 CHECK_WIDTH (signed int, INT_MAX, INT_WIDTH);
  36 #ifndef UINT_WIDTH
  37 # error "missing UINT_WIDTH"
  38 #endif
  39 CHECK_WIDTH (unsigned int, UINT_MAX, UINT_WIDTH);
  40 #ifndef LONG_WIDTH
  41 # error "missing LONG_WIDTH"
  42 #endif
  43 CHECK_WIDTH (signed long, LONG_MAX, LONG_WIDTH);
  44 #ifndef ULONG_WIDTH
  45 # error "missing ULONG_WIDTH"
  46 #endif
  47 CHECK_WIDTH (unsigned long, ULONG_MAX, ULONG_WIDTH);
  48 #ifndef LLONG_WIDTH
  49 # error "missing LLONG_WIDTH"
  50 #endif
  51 CHECK_WIDTH (signed long long, LLONG_MAX, LLONG_WIDTH);
  52 #ifndef ULLONG_WIDTH
  53 # error "missing ULLONG_WIDTH"
  54 #endif
  55 CHECK_WIDTH (unsigned long long, ULLONG_MAX, ULLONG_WIDTH);