chore: import upstream snapshot with attribution

2026-07-13 12:47:05 +08:00
commit 4f3b7da785
7394 changed files with 2005594 additions and 0 deletions
@@ -0,0 +1,71 @@
+/* ******************************************************************************
+ *
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ *  See the NOTICE file distributed with this work for additional
+ *  information regarding copyright ownership.
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ******************************************************************************/
+
+//
+// @author raver119@gmail.com
+//
+#include <helpers/helper_hash.h>
+#include <helpers/logger.h>
+
+namespace sd {
+namespace ops {
+
+HashHelper& HashHelper::getInstance() {
+  static HashHelper instance;
+  return instance;
+}
+
+LongType HashHelper::getLongHash(std::string& str) {
+  _locker.lock();
+  if (!_isInit) {
+    sd_verbose("Building HashUtil table\n", "");
+
+    unsigned long long h = 0x544B2FBACAAF1684L;
+    for (int i = 0; i < 256; i++) {
+      for (int j = 0; j < 31; j++) {
+        h = (((unsigned long long)h) >> 7) ^ h;
+        h = (h << 11) ^ h;
+        h = (((unsigned long long)h) >> 10) ^ h;
+      }
+      _byteTable[i] = h;
+    }
+
+    _isInit = true;
+  }
+
+  _locker.unlock();
+
+  //note: DO NOT change this type.
+  //when something like thread sanitizer + cuda is used
+  //the offsets can get absurdly big.
+  //you get errors like: left shift of 11 places cannot be represented in type
+  unsigned long long h = HSTART;
+  unsigned long long hmult = HMULT;
+
+  LongType len = str.size();
+  for (int i = 0; i < len; i++) {
+    char ch = str.at(i);
+    auto uch = (unsigned char)ch;
+    h = (h * hmult) ^ _byteTable[ch & 0xff];
+    h = (h * hmult) ^ _byteTable[(uch >> 8) & 0xff];
+  }
+
+  return h;
+}
+}  // namespace ops
+}  // namespace sd