baidu palo

be/src/exec/read_write_util.cpp

@@ -0,0 +1,75 @@
+// Modifications copyright (C) 2017, Baidu.com, Inc.
+// Copyright 2017 The Apache Software Foundation
+
+// 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.
+
+#include "exec/read_write_util.h"
+
+namespace palo {
+
+int ReadWriteUtil::put_zint(int32_t integer, uint8_t* buf) {
+    // Move the sign bit to the first bit.
+    uint32_t uinteger = (integer << 1) ^ (integer >> 31);
+    const int mask = 0x7f;
+    const int cont = 0x80;
+    buf[0] = uinteger & mask;
+    int len = 1;
+
+    while ((uinteger >>= 7) != 0) {
+        // Set the continuation bit.
+        buf[len - 1] |= cont;
+        buf[len] = uinteger & mask;
+        ++len;
+    }
+
+    return len;
+}
+
+int ReadWriteUtil::put_zlong(int64_t longint, uint8_t* buf) {
+    // Move the sign bit to the first bit.
+    uint64_t ulongint = (longint << 1) ^ (longint >> 63);
+    const int mask = 0x7f;
+    const int cont = 0x80;
+    buf[0] = ulongint & mask;
+    int len = 1;
+
+    while ((ulongint >>= 7) != 0) {
+        // Set the continuation bit.
+        buf[len - 1] |= cont;
+        buf[len] = ulongint & mask;
+        ++len;
+    }
+
+    return len;
+}
+
+std::string ReadWriteUtil::hex_dump(const uint8_t* buf, int64_t length) {
+    std::stringstream ss;
+    ss << std::hex;
+
+    for (int i = 0; i < length; ++i) {
+        ss << static_cast<int>(buf[i]) << " ";
+    }
+
+    return ss.str();
+}
+
+std::string ReadWriteUtil::hex_dump(const char* buf, int64_t length) {
+    return hex_dump(reinterpret_cast<const uint8_t*>(buf), length);
+}
+}