sdcc/support/regression/tests/funsigned-char.c

   1 /*
   2  * check for the correct signness of a char constant
   3  *   (signed versus unsigned)
   4  *   (indirect via integer promotion)
   5  *
   6  * Note, the check for the --funsigned-char must be invoked by hand
   7  *   see the following emacs sexp
   8  *     (compile "SDCCFLAGS=--funsigned-char make -C .. ALL_TESTS='./tests/funsigned-char.c'")
   9  *     (compile "make -C .. ALL_TESTS='./tests/funsigned-char.c'")
  10  *
  11  */
  12
  13 #include <testfwk.h>
  14 #include <stdint.h>
  15 #include <limits.h>
  16
  17 int glb_schar_to_int = ~ (signed char)   '\200';
  18 int glb_uchar_to_int = ~ (unsigned char) '\200';
  19 int glb_char_to_int  = ~                 '\200';
  20
  21 int tst_schar_to_int()  { return ~ (signed char)   '\200'; }
  22 int tst_uchar_to_int()  { return ~ (unsigned char) '\200'; }
  23 int tst_char_to_int()   { return ~                 '\200'; }
  24
  25
  26 void
  27 testBug(void)
  28 {
  29 #if CHAR_MIN >= 0
  30   ASSERT(CHAR_MAX ==  255);
  31   ASSERT(CHAR_MIN ==    0);
  32 #else
  33   ASSERT(CHAR_MAX ==  127);
  34   ASSERT(CHAR_MIN == -128);
  35 #endif
  36
  37   ASSERT(tst_uchar_to_int() == -129);
  38   ASSERT(glb_uchar_to_int   == -129);
  39
  40   ASSERT(tst_schar_to_int() ==  127);
  41   ASSERT(glb_schar_to_int   ==  127);
  42
  43 #if CHAR_MIN >= 0
  44   ASSERT(tst_char_to_int() == -129);
  45   ASSERT(glb_char_to_int   == -129);
  46 #else
  47   ASSERT(tst_char_to_int() ==  127);
  48   ASSERT(glb_char_to_int   ==  127);
  49 #endif
  50 }
  51