1  /* Test integer width macros.
       2     Copyright (C) 2016-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <limits.h>
      20  #include <stdio.h>
      21  
      22  #define CHECK_WIDTH(TYPE, MAX, WIDTH)					\
      23    do									\
      24      {									\
      25        if ((MAX >> ((TYPE) -1 < 0 ? (WIDTH - 2) : (WIDTH - 1))) != 1)	\
      26  	{								\
      27  	  puts ("bad width of " #TYPE);					\
      28  	  result = 1;							\
      29  	}								\
      30        else								\
      31  	puts ("width of " #TYPE " OK");					\
      32      }									\
      33    while (0)
      34  
      35  static int
      36  do_test (void)
      37  {
      38    int result = 0;
      39  #ifndef CHAR_WIDTH
      40  # error "missing CHAR_WIDTH"
      41  #endif
      42    CHECK_WIDTH (char, CHAR_MAX, CHAR_WIDTH);
      43  #ifndef SCHAR_WIDTH
      44  # error "missing SCHAR_WIDTH"
      45  #endif
      46    CHECK_WIDTH (signed char, SCHAR_MAX, SCHAR_WIDTH);
      47  #ifndef UCHAR_WIDTH
      48  # error "missing UCHAR_WIDTH"
      49  #endif
      50    CHECK_WIDTH (unsigned char, UCHAR_MAX, UCHAR_WIDTH);
      51  #ifndef SHRT_WIDTH
      52  # error "missing SHRT_WIDTH"
      53  #endif
      54    CHECK_WIDTH (signed short, SHRT_MAX, SHRT_WIDTH);
      55  #ifndef USHRT_WIDTH
      56  # error "missing USHRT_WIDTH"
      57  #endif
      58    CHECK_WIDTH (unsigned short, USHRT_MAX, USHRT_WIDTH);
      59  #ifndef INT_WIDTH
      60  # error "missing INT_WIDTH"
      61  #endif
      62    CHECK_WIDTH (signed int, INT_MAX, INT_WIDTH);
      63  #ifndef UINT_WIDTH
      64  # error "missing UINT_WIDTH"
      65  #endif
      66    CHECK_WIDTH (unsigned int, UINT_MAX, UINT_WIDTH);
      67  #ifndef LONG_WIDTH
      68  # error "missing LONG_WIDTH"
      69  #endif
      70    CHECK_WIDTH (signed long, LONG_MAX, LONG_WIDTH);
      71  #ifndef ULONG_WIDTH
      72  # error "missing ULONG_WIDTH"
      73  #endif
      74    CHECK_WIDTH (unsigned long, ULONG_MAX, ULONG_WIDTH);
      75  #ifndef LLONG_WIDTH
      76  # error "missing LLONG_WIDTH"
      77  #endif
      78    CHECK_WIDTH (signed long long, LLONG_MAX, LLONG_WIDTH);
      79  #ifndef ULLONG_WIDTH
      80  # error "missing ULLONG_WIDTH"
      81  #endif
      82    CHECK_WIDTH (unsigned long long, ULLONG_MAX, ULLONG_WIDTH);
      83    return result;
      84  }
      85  
      86  #define TEST_FUNCTION do_test ()
      87  #include "../test-skeleton.c"