gnu/dist/gcc4/gcc/testsuite/gcc.dg/cpp/charconst-3.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do run } */
   4 /* { dg-options -Wno-multichar } */
   5
   6 /* This tests values and signedness of multichar charconsts.
   7
   8    Neil Booth, 5 May 2002.  */
   9
  10 #include <limits.h>
  11
  12 extern void abort (void);
  13
  14 int main ()
  15 {
  16   /* These tests require at least 2-byte ints.  8-)  */
  17 #if INT_MAX > 127
  18   int scale = (int) (unsigned char) -1 + 1;
  19
  20   if ('ab' != (int) ((unsigned char) 'a' * scale + (unsigned char) 'b'))
  21     abort ();
  22
  23   if ('\234b' != (int) ((unsigned char) '\234' * scale + (unsigned char) 'b'))
  24     abort ();
  25
  26   if ('b\234' != (int) ((unsigned char) 'b' * scale + (unsigned char) '\234'))
  27     abort ();
  28   /* Multichar charconsts have type int and should be signed.  */
  29 #if INT_MAX == 32767
  30 # if '\234a' > 0
  31 #  error Preprocessor charconsts 1
  32 # endif
  33   if ('\234a' > 0)
  34     abort ();
  35 #elif INT_MAX == 2147483647
  36 # if '\234aaa' > 0
  37 #  error Preprocessor charconsts 2
  38 # endif
  39   if ('\234aaa' > 0)
  40     abort ();
  41 #elif INT_MAX == 9223372036854775807
  42 # if '\234aaaaaaa' > 0
  43 #  error Preprocessor charconsts 3
  44 # endif
  45   if ('\234aaaaaaa' > 0)
  46     abort ();
  47 #endif
  48 #endif
  49   return 0;
  50 }