hash/test_streaming.d

   1 import iv.hash.fasthash;
   2 import iv.hash.joaat;
   3 import iv.hash.murhash;
   4
   5 import iv.pxclock;
   6 import iv.vfs.io;
   7
   8 /*
   9     TESTHASH(x86, 32, 1234, "Hello, world!", "faf6cdb3");
  10     TESTHASH(x86, 32, 4321, "Hello, world!", "bf505788");
  11     TESTHASH(x86, 32, 1234, "xxxxxxxxxxxxxxxxxxxxxxxxxxxx", "8905ac28");
  12     TESTHASH(x86, 32, 1234, "", "0f2cc00b");
  13 */
  14
  15 void doHash(T, bool norand=false) (scope const(void)[] buf, uint eta, uint seed=0) if (is(T == struct)) {
  16   T hash;
  17   if (seed) hash.reset(seed);
  18   static if (norand) {
  19     hash.put(buf);
  20   } else {
  21     while (buf.length > 0) {
  22       import std.random : uniform;
  23       auto len = uniform!"[]"(0, buf.length);
  24       hash.put(buf[0..len]);
  25       buf = buf[len..$];
  26     }
  27   }
  28   auto h = hash.finish32();
  29   if (h != eta) assert(0, T.stringof~" failed "~(norand ? "initial " : "")~"streaming test");
  30 }
  31
  32
  33 void doTest(T) (scope const(void)[] buf, uint eta, uint seed=0) if (is(T == struct)) {
  34   enum Tries = 100000;
  35   write(T.stringof, ": ");
  36   auto stt = clockMilli();
  37   doHash!(T, true)(buf, eta, seed);
  38   foreach (immutable _; 0..Tries) doHash!T(buf, eta, seed);
  39   auto ett = clockMilli()-stt;
  40   writeln(Tries, " times took ", ett, " milliseconds");
  41 }
  42
  43
  44 void main () {
  45   //doTest!JoaatHash();
  46   //doTest!FastHash();
  47   doTest!MurHash("Hello, world!", 0xfaf6cdb3U, 1234);
  48   doTest!MurHash("Hello, world!", 0xbf505788U, 4321);
  49   doTest!MurHash("xxxxxxxxxxxxxxxxxxxxxxxxxxxx", 0x8905ac28U, 1234);
  50   doTest!MurHash("", 0x0f2cc00bU, 1234);
  51 }