src/regression/printf-fmt-g-round.c

   1 // commit e94d0692864ecf9522fd6a97610a47a2f718d3de 2014-04-07
   2 // %g midpoint cases should be rounded to even
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include "test.h"
   6
   7 static void t(const char *fmt, double d, const char *want)
   8 {
   9         char buf[256];
  10         int n = strlen(want);
  11         int r = snprintf(buf, sizeof buf, fmt, d);
  12         if (r != n || memcmp(buf, want, n+1) != 0)
  13                 t_error("snprintf(\"%s\", %f) want %s got %s\n", fmt, d, want, buf);
  14 }
  15
  16 int main()
  17 {
  18         t("%.12g", 1000000000005.0, "1e+12");
  19         t("%.12g", 100000000002500.0, "1.00000000002e+14");
  20         return t_status;
  21 }