gcc/testsuite/gcc.c-torture/execute/20000605-1.c

   1 void abort (void);
   2 void exit (int);
   3
   4 typedef struct _RenderInfo RenderInfo;
   5 struct _RenderInfo
   6 {
   7     int y;
   8     float scaley;
   9     int src_y;
  10 };
  11
  12 static void bar(void) { }
  13
  14 static int
  15 render_image_rgb_a (RenderInfo * info)
  16 {
  17   int y, ye;
  18   float error;
  19   float step;
  20
  21   y = info->y;
  22   ye = 256;
  23
  24   step = 1.0 / info->scaley;
  25
  26   error = y * step;
  27   error -= ((int) error) - step;
  28
  29   for (; y < ye; y++) {
  30       if (error >= 1.0) {
  31           info->src_y += (int) error;
  32           error -= (int) error;
  33           bar();
  34       }
  35       error += step;
  36   }
  37   return info->src_y;
  38 }
  39
  40 int main (void)
  41 {
  42     RenderInfo info;
  43
  44     info.y = 0;
  45     info.src_y = 0;
  46     info.scaley = 1.0;
  47
  48     if (render_image_rgb_a(&info) != 256)
  49        abort ();
  50     exit(0);
  51 }