gcc/testsuite/gcc.dg/c99-bool-1.c

   1 /* Test for _Bool and <stdbool.h> in C99.  */
   2 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
   3 /* { dg-do run } */
   4 /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
   5
   6 /* _Bool must be a builtin type.  */
   7
   8 _Bool foo;
   9
  10 #include <stdbool.h>
  11
  12 /* Three macros must be integer constant expressions suitable for use
  13    in #if.
  14 */
  15
  16 #if !defined(true) || (true != 1)
  17 #error "bad stdbool true" /* { dg-bogus "#error" "bad stdbool.h" } */
  18 #endif
  19
  20 #if !defined(false) || (false != 0)
  21 #error "bad stdbool false" /* { dg-bogus "#error" "bad stdbool.h" } */
  22 #endif
  23
  24 #if !defined(__bool_true_false_are_defined) || (__bool_true_false_are_defined != 1)
  25 #error "bad stdbool __bool_true_false_are_defined" /* { dg-bogus "#error" "bad stdbool.h" } */
  26 #endif
  27
  28 int a = true;
  29 int b = false;
  30 int c = __bool_true_false_are_defined;
  31
  32 struct foo
  33 {
  34   _Bool a : 1;
  35   _Bool b : 2;
  36   _Bool c : 7;
  37 } sf;
  38
  39 #define str(x) xstr(x)
  40 #define xstr(x) #x
  41
  42
  43 extern void abort (void);
  44 extern void exit (int);
  45 extern int strcmp (const char *, const char *);
  46
  47 int
  48 main (void)
  49 {
  50   /* The macro `bool' must expand to _Bool.  */
  51   const char *t = str (bool);
  52   _Bool u, v;
  53   if (strcmp (t, "_Bool"))
  54     abort ();
  55   if (a != 1 || b != 0 || c != 1)
  56     abort ();
  57   /* Casts to _Bool have a specified behaviour.  */
  58   if ((int)(_Bool)2 != 1)
  59     abort ();
  60   if ((int)(_Bool)0.2 != 1)
  61     abort ();
  62   /* Pointers may be assigned to _Bool.  */
  63   if ((u = t) != 1)
  64     abort ();
  65   /* _Bool may be used to subscript arrays.  */
  66   u = 0;
  67   if (t[u] != '_')
  68     abort ();
  69   if (u[t] != '_')
  70     abort ();
  71   u = 1;
  72   if (t[u] != 'B')
  73     abort ();
  74   if (u[t] != 'B')
  75     abort ();
  76   /* Test increment and decrement operators.  */
  77   u = 0;
  78   if (u++ != 0)
  79     abort ();
  80   if (u != 1)
  81     abort ();
  82   if (u++ != 1)
  83     abort ();
  84   if (u != 1)
  85     abort ();
  86   u = 0;
  87   if (++u != 1)
  88     abort ();
  89   if (u != 1)
  90     abort ();
  91   if (++u != 1)
  92     abort ();
  93   if (u != 1)
  94     abort ();
  95   u = 0;
  96   if (u-- != 0)
  97     abort ();
  98   if (u != 1)
  99     abort ();
 100   if (u-- != 1)
 101     abort ();
 102   if (u != 0)
 103     abort ();
 104   u = 0;
 105   if (--u != 1)
 106     abort ();
 107   if (u != 1)
 108     abort ();
 109   if (--u != 0)
 110     abort ();
 111   if (u != 0)
 112     abort ();
 113   /* Test unary + - ~ !.  */
 114   u = 0;
 115   if (+u != 0)
 116     abort ();
 117   if (-u != 0)
 118     abort ();
 119   u = 1;
 120   if (+u != 1)
 121     abort ();
 122   if (-u != -1)
 123     abort ();
 124   u = 2;
 125   if (+u != 1)
 126     abort ();
 127   if (-u != -1)
 128     abort ();
 129   u = 0;
 130   if (~u != ~(int)0)
 131     abort ();
 132   u = 1;
 133   if (~u != ~(int)1)
 134     abort ();
 135   u = 0;
 136   if (!u != 1)
 137     abort ();
 138   u = 1;
 139   if (!u != 0)
 140     abort ();
 141   /* Test arithmetic * / % + - (which all apply promotions).  */
 142   u = 0;
 143   if (u + 2 != 2)
 144     abort ();
 145   u = 1;
 146   if (u * 4 != 4)
 147     abort ();
 148   if (u % 3 != 1)
 149     abort ();
 150   if (u / 1 != 1)
 151     abort ();
 152   if (4 / u != 4)
 153     abort ();
 154   if (u - 7 != -6)
 155     abort ();
 156   /* Test bitwise shift << >>.  */
 157   u = 1;
 158   if (u << 1 != 2)
 159     abort ();
 160   if (u >> 1 != 0)
 161     abort ();
 162   /* Test relational and equality operators < > <= >= == !=.  */
 163   u = 0;
 164   v = 0;
 165   if (u < v || u > v || !(u <= v) || !(u >= v) || !(u == v) || u != v)
 166     abort ();
 167   u = 0;
 168   v = 1;
 169   if (!(u < v) || u > v || !(u <= v) || u >= v || u == v || !(u != v))
 170     abort ();
 171   /* Test bitwise operators & ^ |.  */
 172   u = 1;
 173   if ((u | 2) != 3)
 174     abort ();
 175   if ((u ^ 3) != 2)
 176     abort ();
 177   if ((u & 1) != 1)
 178     abort ();
 179   if ((u & 0) != 0)
 180     abort ();
 181   /* Test logical && ||.  */
 182   u = 0;
 183   v = 1;
 184   if (!(u || v))
 185     abort ();
 186   if (!(v || u))
 187     abort ();
 188   if (u && v)
 189     abort ();
 190   if (v && u)
 191     abort ();
 192   u = 1;
 193   v = 1;
 194   if (!(u && v))
 195     abort ();
 196   /* Test conditional ? :.  */
 197   u = 0;
 198   if ((u ? 4 : 7) != 7)
 199     abort ();
 200   u = 1;
 201   v = 0;
 202   if ((1 ? u : v) != 1)
 203     abort ();
 204   if ((1 ? 4 : u) != 4)
 205     abort ();
 206   /* Test assignment operators = *= /= %= += -= <<= >>= &= ^= |=.  */
 207   if ((u = 2) != 1)
 208     abort ();
 209   if (u != 1)
 210     abort ();
 211   if ((u *= -1) != 1)
 212     abort ();
 213   if (u != 1)
 214     abort ();
 215   if ((u /= 2) != 0)
 216     abort ();
 217   if ((u += 3) != 1)
 218     abort ();
 219   if ((u -= 1) != 0)
 220     abort ();
 221   u = 1;
 222   if ((u <<= 4) != 1)
 223     abort ();
 224   if ((u >>= 1) != 0)
 225     abort ();
 226   u = 1;
 227   if ((u &= 0) != 0)
 228     abort ();
 229   if ((u |= 2) != 1)
 230     abort ();
 231   /* ??? A bit queer, since this gets optimized to ((u = (u != 3)) != 1)
 232      early in semantic analysis, which then yields the warning below.  */
 233   if ((u ^= 3) != 1)    /* { dg-warning "always true due to limited range" } */
 234     abort ();
 235   /* Test comma expressions.  */
 236   u = 1;
 237   if ((4, u) != 1)
 238     abort ();
 239   /* Test bitfields.  */
 240   {
 241     int i;
 242     for (i = 0; i < sizeof (struct foo); i++)
 243       *((unsigned char *)&sf + i) = (unsigned char) -1;
 244     sf.a = 1;
 245     if (sf.a != 1)
 246       abort ();
 247     sf.b = 1;
 248     if (sf.b != 1)
 249       abort ();
 250     sf.c = 1;
 251     if (sf.c != 1)
 252       abort ();
 253     sf.a = 0;
 254     if (sf.a != 0)
 255       abort ();
 256     sf.b = 0;
 257     if (sf.b != 0)
 258       abort ();
 259     sf.c = 0;
 260     if (sf.c != 0)
 261       abort ();
 262   }
 263   exit (0);
 264 }