[Refactor]Merged string_value into string_ref (#15925)

be/src/vec/common/string_ref.cpp

@@ -0,0 +1,81 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// 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.
+// This file is copied from
+// https://github.com/ClickHouse/ClickHouse/blob/master/base/base/StringRef.
+// And modified by Doris
+
+#include "string_ref.h"
+
+namespace doris {
+
+StringRef StringRef::trim() const {
+    // Remove leading and trailing spaces.
+    int32_t begin = 0;
+
+    while (begin < size && data[begin] == ' ') {
+        ++begin;
+    }
+
+    int32_t end = size - 1;
+
+    while (end > begin && data[end] == ' ') {
+        --end;
+    }
+
+    return StringRef(data + begin, end - begin + 1);
+}
+
+// TODO: rewrite in AVX2
+size_t StringRef::find_first_of(char c) const {
+    const char* p = static_cast<const char*>(memchr(data, c, size));
+    return p == nullptr ? -1 : p - data;
+}
+
+StringRef StringRef::min_string_val() {
+    return StringRef((char*)(&StringRef::MIN_CHAR), 0);
+}
+
+StringRef StringRef::max_string_val() {
+    return StringRef((char*)(&StringRef::MAX_CHAR), 1);
+}
+
+bool StringRef::start_with(const StringRef& search_string) const {
+    DCHECK(size >= search_string.size);
+    if (search_string.size == 0) {
+        return true;
+    }
+
+#if defined(__SSE2__) || defined(__aarch64__)
+    return memequalSSE2Wide(data, search_string.data, search_string.size);
+#else
+    return 0 == memcmp(data, search_string.data, search_string.size);
+#endif
+}
+bool StringRef::end_with(const StringRef& search_string) const {
+    DCHECK(size >= search_string.size);
+    if (search_string.size == 0) {
+        return true;
+    }
+
+#if defined(__SSE2__) || defined(__aarch64__)
+    return memequalSSE2Wide(data + size - search_string.size, search_string.data,
+                            search_string.size);
+#else
+    return 0 == memcmp(data + size - search_string.size, search_string.data, search_string.size);
+#endif
+}
+} // namespace doris