使用zlib（deflate）压缩字符串并将其保留在内存中

Question

几个月前我开始使用C ++，并试图用zlib压缩一块缓冲区，但是我没有使用fopen / fwrite将其压缩到一个文件中，而是想将整个缓冲区压缩成一个char数组，将其保存在内存中而不是写入磁盘。 这是我目前的代码：

int File::Write(const void *pBuffer,int nByte) {
    if (!m_pFile || !m_bWrite)
        return 0;

    m_Stream.next_in  = (Bytef*)pBuffer;
    m_Stream.avail_in = (uInt)nByte;

    int err = deflate(&m_Stream, Z_NO_FLUSH);

    while (m_Stream.avail_out == 0) {
        size_t nWritten = fwrite(m_Buffer,1,sizeof(m_Buffer),m_pFile);
        if(nWritten<sizeof(m_Buffer)) return 0;

        m_Stream.avail_out = sizeof(m_Buffer);
        m_Stream.next_out = m_Buffer;

        err = deflate(&m_Stream, Z_NO_FLUSH);
    }

    return nByte;
}

bool File::Close() {
    int err;

    if(m_bWrite) {
        /* Finish the stream, still forcing small buffers: */
        for (;;) {
            err = deflate(&m_Stream, Z_FINISH);

            fwrite(m_Buffer, 1, sizeof(m_Buffer) - m_Stream.avail_out, m_pFile);
            m_Stream.avail_out = sizeof(m_Buffer);
            m_Stream.next_out = m_Buffer;

            if (err == Z_STREAM_END) break;
            CHECK_ERR(err, "deflate");
        }

        err = deflateEnd(&m_Stream);

        fclose(m_pFile);
        m_pFile = NULL;
    } else {
        err = inflateEnd(&m_Stream);

        fclose(m_pFile);
        m_pFile = NULL;
    }

    return true;
}