boost :: iostream bzip2_decompressor不解压缩bzip2_compressor压缩的文件

Question

boost :: iostream bzip2_decompressor不解压缩bzip2_compressor压缩的文件

Answer 1

这是一个简单的自包含示例，显示它可以工作：

<强> Live On Coliru

#include <iostream>
#include <boost/iostreams/filtering_stream.hpp>
#include <boost/iostreams/copy.hpp>
#include <boost/iostreams/filter/bzip2.hpp>
#include <sstream>

namespace io = boost::iostreams;

int main()
{
    std::stringstream ss;

    {
        io::filtering_stream<io::output> of;
        of.push(io::bzip2_compressor{});
        of.push(ss);

        io::copy(std::cin, of);
    }

    std::cout << "Compressed input: " << ss.str().size() << " bytes\n";

    ss.seekg(0ul);
    {
        io::filtering_stream<io::input> if_;
        if_.push(io::bzip2_decompressor{});
        if_.push(ss);

        io::copy(if_, std::cout);
    }
}

在Coliru上，它显示它将自身压缩为331个字节，然后再返回到stdout

也许你忘了刷新，有非二进制，空白跳过。没有SSCCE，我们无法分辨