Initial checkin of gRPC to third_party/

third_party/grpc/test/core/support/murmur_hash_test.c

Index: third_party/grpc/test/core/support/murmur_hash_test.c
diff --git a/third_party/WebKit/Source/core/layout/OrderIterator.cpp b/third_party/grpc/test/core/support/murmur_hash_test.c
similarity index 51%
copy from third_party/WebKit/Source/core/layout/OrderIterator.cpp
copy to third_party/grpc/test/core/support/murmur_hash_test.c
index 8813561b862d5882183732d768d453e309737a4f..562b9567e719f05161d8247ea63202106c35aa93 100644
--- a/third_party/WebKit/Source/core/layout/OrderIterator.cpp
+++ b/third_party/grpc/test/core/support/murmur_hash_test.c
@@ -1,5 +1,7 @@
 /*
- * Copyright (C) 2011 Google Inc. All rights reserved.
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -26,66 +28,61 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
  */
 
-#include "core/layout/OrderIterator.h"
+#include "src/core/support/murmur_hash.h"
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+#include "test/core/util/test_config.h"
 
-#include "core/layout/LayoutBox.h"
+#include <string.h>
 
-namespace blink {
+typedef uint32_t (*hash_func)(const void *key, size_t len, uint32_t seed);
 
-OrderIterator::OrderIterator(const LayoutBox* containerBox)
-    : m_containerBox(containerBox)
-    , m_currentChild(nullptr)
-    , m_isReset(false)
-{
-}
+/* From smhasher:
+   This should hopefully be a thorough and uambiguous test of whether a hash
+   is correctly implemented on a given platform */
 
-LayoutBox* OrderIterator::first()
-{
-    reset();
-    return next();
-}
+static void verification_test(hash_func hash, uint32_t expected) {
+  uint8_t key[256];
+  uint32_t hashes[256];
+  uint32_t final = 0;
+  size_t i;
 
-LayoutBox* OrderIterator::next()
-{
-    do {
-        if (!m_currentChild) {
-            if (m_orderValuesIterator == m_orderValues.end())
-                return nullptr;
+  memset(key, 0, sizeof(key));
+  memset(hashes, 0, sizeof(hashes));
 
-            if (!m_isReset) {
-                ++m_orderValuesIterator;
-                if (m_orderValuesIterator == m_orderValues.end())
-                    return nullptr;
-            } else {
-                m_isReset = false;
-            }
+  /* Hash keys of the form {0}, {0,1}, {0,1,2}... up to N=255,using 256-N as
+     the seed */
 
-            m_currentChild = m_containerBox->firstChildBox();
-        } else {
-            m_currentChild = m_currentChild->nextSiblingBox();
-        }
-    } while (!m_currentChild || m_currentChild->style()->order() != *m_orderValuesIterator);
+  for (i = 0; i < 256; i++) {
+    key[i] = (uint8_t)i;
+    hashes[i] = hash(key, i, (uint32_t)(256u - i));
+  }
 
-    return m_currentChild;
-}
+  /* Then hash the result array */
 
-void OrderIterator::reset()
-{
-    m_currentChild = nullptr;
-    m_orderValuesIterator = m_orderValues.begin();
-    m_isReset = true;
-}
+  final = hash(hashes, sizeof(hashes), 0);
 
-OrderIteratorPopulator::~OrderIteratorPopulator()
-{
-    m_iterator.reset();
-}
+  /* The first four bytes of that hash, interpreted as a little-endian integer,
+     is our
+     verification value */
 
-void OrderIteratorPopulator::collectChild(const LayoutBox* child)
-{
-    m_iterator.m_orderValues.insert(child->style()->order());
+  if (expected != final) {
+    gpr_log(GPR_INFO, "Verification value 0x%08X : Failed! (Expected 0x%08x)",
+            final, expected);
+    abort();
+  } else {
+    gpr_log(GPR_INFO, "Verification value 0x%08X : Passed!", final);
+  }
 }
 
-} // namespace blink
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  /* basic tests to verify that things don't crash */
+  gpr_murmur_hash3("", 0, 0);
+  gpr_murmur_hash3("xyz", 3, 0);
+  verification_test(gpr_murmur_hash3, 0xB0F57EE3);
+  return 0;
+}