sdcc/support/regression/tests/bug-905492.c

   1 /* bug-905492.c
   2
   3    the standard guarantees left-to-right evaluation,
   4    if the first operand is unequal 0 (resp. 0), the second isn't evaluated.
   5 */
   6
   7 #include <testfwk.h>
   8
   9 char a;
  10
  11 char
  12 inc_a(char c)
  13 {
  14   a += 1;
  15   return c;
  16 }
  17
  18 void
  19 testLeftRightAndOr(void)
  20 {
  21   volatile char c;
  22
  23   a = 0; c = inc_a(0) || inc_a(0); ASSERT(a == 2);
  24   a = 0; c = inc_a(0) || inc_a(1); ASSERT(a == 2);
  25   a = 0; c = inc_a(1) || inc_a(0); ASSERT(a == 1);
  26   a = 0; c = inc_a(1) || inc_a(1); ASSERT(a == 1);
  27
  28   a = 0; c = inc_a(0) && inc_a(0); ASSERT(a == 1);
  29   a = 0; c = inc_a(0) && inc_a(1); ASSERT(a == 1);
  30   a = 0; c = inc_a(1) && inc_a(0); ASSERT(a == 2);
  31   a = 0; c = inc_a(1) && inc_a(1); ASSERT(a == 2);
  32 }