lib/replace/test/snprintf.c

   1 void foo(const char *format, ...)
   2 {
   3         va_list ap;
   4         int len;
   5         char buf[20];
   6         long long l = 1234567890;
   7         l *= 100;
   8
   9         va_start(ap, format);
  10         len = vsnprintf(buf, 0, format, ap);
  11         va_end(ap);
  12         if (len != 5) exit(1);
  13
  14         va_start(ap, format);
  15         len = vsnprintf(0, 0, format, ap);
  16         va_end(ap);
  17         if (len != 5) exit(2);
  18
  19         if (snprintf(buf, 3, "hello") != 5 || strcmp(buf, "he") != 0) exit(3);
  20
  21         if (snprintf(buf, 20, "%lld", l) != 12 || strcmp(buf, "123456789000") != 0) exit(4);
  22         if (snprintf(buf, 20, "%zu", 123456789) != 9 || strcmp(buf, "123456789") != 0) exit(5);
  23         if (snprintf(buf, 20, "%2\$d %1\$d", 3, 4) != 3 || strcmp(buf, "4 3") != 0) exit(6);
  24         if (snprintf(buf, 20, "%s", 0) < 3) exit(7);
  25
  26         printf("1");
  27         exit(0);
  28 }
  29 main() { foo("hello"); }