| /* |
| * 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 "InputStream.h"
|
| #include <algorithm>
|
| #include "MemoryOutputStream.h"
|
| #include "big_endian.h"
|
|
|
| namespace rocketmq {
|
| int64 InputStream::getNumBytesRemaining() {
|
| int64 len = getTotalLength();
|
|
|
| if (len >= 0) len -= getPosition();
|
|
|
| return len;
|
| }
|
|
|
| char InputStream::readByte() {
|
| char temp = 0;
|
| read(&temp, 1);
|
| return temp;
|
| }
|
|
|
| bool InputStream::readBool() { return readByte() != 0; }
|
|
|
| short InputStream::readShortBigEndian() {
|
| char temp[2];
|
|
|
| if (read(temp, 2) == 2) {
|
| short int v;
|
| ReadBigEndian(temp, &v);
|
| return v;
|
| }
|
|
|
| return 0;
|
| }
|
|
|
| int InputStream::readIntBigEndian() {
|
| char temp[4];
|
|
|
| if (read(temp, 4) == 4) {
|
| int v;
|
| ReadBigEndian(temp, &v);
|
| return v;
|
| }
|
| return 0;
|
| }
|
|
|
| int64 InputStream::readInt64BigEndian() {
|
| char asBytes[8];
|
| uint64 asInt64;
|
|
|
| if (read(asBytes, 8) == 8) {
|
| ReadBigEndian(asBytes, &asInt64);
|
| return asInt64;
|
| }
|
| return 0;
|
| }
|
|
|
| float InputStream::readFloatBigEndian() {
|
| union {
|
| int32 asInt;
|
| float asFloat;
|
| } n;
|
| n.asInt = (int32)readIntBigEndian();
|
| return n.asFloat;
|
| }
|
|
|
| double InputStream::readDoubleBigEndian() {
|
| union {
|
| int64 asInt;
|
| double asDouble;
|
| } n;
|
| n.asInt = readInt64BigEndian();
|
| return n.asDouble;
|
| }
|
|
|
| size_t InputStream::readIntoMemoryBlock(MemoryBlock& block, size_t numBytes) {
|
| MemoryOutputStream mo(block, true);
|
| return (size_t)mo.writeFromInputStream(*this, numBytes);
|
| }
|
|
|
| //==============================================================================
|
| void InputStream::skipNextBytes(int64 numBytesToSkip) {
|
| if (numBytesToSkip > 0) {
|
| const int skipBufferSize = (int)std::min(numBytesToSkip, (int64)16384);
|
| char* temp = static_cast<char*>(std::malloc(skipBufferSize * sizeof(char)));
|
|
|
| while (numBytesToSkip > 0 && !isExhausted())
|
| numBytesToSkip -=
|
| read(temp, (int)std::min(numBytesToSkip, (int64)skipBufferSize));
|
|
|
| std::free(temp);
|
| }
|
| }
|
| }
|