gcc/testsuite/gcc.dg/cpp/charconst-4.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do run } */
   4 /* { dg-options "-Wno-multichar -fsigned-char" } */
   5
   6 /* This tests how overly-long multichar charconsts are truncated, and
   7    whether "short" multichar charconsts are incorrectly sign extended
   8    (regardless of char signedness).  Preprocessor is used so that we
   9    have only one place where the too long warning is generated, so
  10    that the test works for all targets.
  11
  12    Neil Booth, 8 May 2002.  */
  13
  14 #include <limits.h>
  15
  16 extern void abort (void);
  17
  18 #if INT_MAX == 32767
  19 # define LONG_CHARCONST '!\234a'
  20 # define SHORT_CHARCONST '\234a'
  21 # define POS_CHARCONST '\1'
  22 #elif INT_MAX == 2147483647
  23 # define LONG_CHARCONST '!\234abc'
  24 # define SHORT_CHARCONST '\234abc'
  25 # define POS_CHARCONST '\234a'
  26 #elif INT_MAX == 9223372036854775807
  27 # define LONG_CHARCONST '!\234abcdefg'
  28 # define SHORT_CHARCONST '\234abcdefg'
  29 # define POS_CHARCONST '\234a'
  30 #else
  31 /* Target int size not handled, do something that won't fail.  */
  32 # define LONG_CHARCONST '\234a'
  33 # define SHORT_CHARCONST '\234a'
  34 # define POS_CHARCONST '\1'
  35 #endif
  36
  37 #if POS_CHARCONST < 0
  38 # error Charconst incorrectly sign-extended
  39 #endif
  40
  41 #if LONG_CHARCONST != SHORT_CHARCONST /* { dg-warning "too long" "" } */
  42 # error Overly long charconst truncates wrongly for preprocessor
  43 #endif
  44
  45 int main ()
  46 {
  47   if (POS_CHARCONST < 0)
  48     abort ();
  49   if (LONG_CHARCONST != SHORT_CHARCONST)  /* { dg-warning "too long" "" } */
  50     abort ();
  51   return 0;
  52 }