bytearrayinputstream.cpp

来自「log4cxx 0.10 unix下编译包」· C++ 代码 · 共 56 行

/*
 * 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 <log4cxx/logstring.h>
#include <log4cxx/helpers/bytearrayinputstream.h>
#include <log4cxx/helpers/exception.h>
#include <log4cxx/helpers/bytebuffer.h>
#include <apr_file_io.h>
#include <log4cxx/helpers/transcoder.h>
#include <algorithm>

using namespace log4cxx;
using namespace log4cxx::helpers;
using namespace std;

IMPLEMENT_LOG4CXX_OBJECT(ByteArrayInputStream)

ByteArrayInputStream::ByteArrayInputStream(const std::vector<unsigned char>& bytes) :
    buf(bytes), pos(0) {
}



ByteArrayInputStream::~ByteArrayInputStream() {
}


void ByteArrayInputStream::close() {
}


int ByteArrayInputStream::read(ByteBuffer& dst) {
    if (pos >= buf.size()) {
        return -1;
    } else {
        size_t bytesCopied = min(dst.remaining(), buf.size() - pos);
        memcpy(dst.current(), &buf[pos], bytesCopied);
        pos += bytesCopied;
        dst.position(dst.position() + bytesCopied);
        return bytesCopied;
    }
}