C++ 使用Boost gzip_解压器解压内存中的数据
我正在尝试使用BoostC++ 使用Boost gzip_解压器解压内存中的数据,c++,boost,compression,C++,Boost,Compression,我正在尝试使用Boostgzip\u解压器解压内存中的二进制数据。从中,我改编了以下代码: vector<char> unzip(const vector<char> compressed) { vector<char> decompressed = vector<char>(); boost::iostreams::filtering_ostream os; os.push(boost::iostreams::gzip
gzip\u解压器
解压内存中的二进制数据。从中,我改编了以下代码:
vector<char> unzip(const vector<char> compressed)
{
vector<char> decompressed = vector<char>();
boost::iostreams::filtering_ostream os;
os.push(boost::iostreams::gzip_decompressor());
os.push(boost::iostreams::back_inserter(decompressed));
boost::iostreams::write(os, &compressed[0], compressed.size());
return decompressed;
}
矢量解压(常量矢量压缩)
{
向量解压缩=向量();
boost::iostreams::过滤ostream操作系统;
push(boost::iostreams::gzip_decompressor());
push(boost::iostreams::back_inserter(解压缩));
boost::iostreams::write(操作系统,&compressed[0],compressed.size());
减压返回;
}
但是,返回的向量长度为零。我做错了什么?我尝试在操作系统流上调用
flush()
,但没有什么不同您的代码对我来说适用于这个简单的测试程序:
#include <iostream>
#include <vector>
#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/filter/gzip.hpp>
std::vector<char> unzip(const std::vector<char> compressed)
{
std::vector<char> decompressed = std::vector<char>();
boost::iostreams::filtering_ostream os;
os.push(boost::iostreams::gzip_decompressor());
os.push(boost::iostreams::back_inserter(decompressed));
boost::iostreams::write(os, &compressed[0], compressed.size());
return decompressed;
}
int main() {
std::vector<char> compressed;
{
boost::iostreams::filtering_ostream os;
os.push(boost::iostreams::gzip_compressor());
os.push(boost::iostreams::back_inserter(compressed));
os << "hello\n";
os.reset();
}
std::cout << "Compressed size: " << compressed.size() << '\n';
const std::vector<char> decompressed = unzip(compressed);
std::cout << std::string(decompressed.begin(), decompressed.end());
return 0;
}
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std::vector解压(const std::vector压缩)
{
std::vector解压缩=std::vector();
boost::iostreams::过滤ostream操作系统;
push(boost::iostreams::gzip_decompressor());
push(boost::iostreams::back_inserter(解压缩));
boost::iostreams::write(操作系统,&compressed[0],compressed.size());
减压返回;
}
int main(){
std::矢量压缩;
{
boost::iostreams::过滤ostream操作系统;
push(boost::iostreams::gzip_compressor());
push(boost::iostreams::back_插入器(压缩));
操作系统很奇怪,你的例子对我不起作用(产生零长度输出)。也许这是一个构建问题。这很奇怪。它对我来说适用于os X 10.7.5和boost 1.52以及Ubuntu 10.10和boost 1.53。