Function DecodeString

src/brpc/details/hpack.cpp:606–635

}

inline ssize_t DecodeString(butil::IOBufBytesIterator& iter, std::string* out) {
    if (iter == NULL) {
        return 0;
    }
    const bool huffman = *iter & 0x80;
    uint32_t length = 0;
    ssize_t in_bytes = DecodeInteger(iter, 7, &length);
    if (in_bytes <= 0) {
        return -1;
    }
    if (length > iter.bytes_left()) {
        return 0;
    }
    in_bytes += length;
    out->clear();
    if (!huffman) {
        iter.copy_and_forward(out, length);
        return in_bytes;
    }
    HuffmanDecoder d(out, s_huffman_tree);
    for (; iter != NULL && length; ++iter, --length) {
        if (d.Decode(*iter) != 0) {
            return -1;
        }
    }
    if (d.EndStream() != 0) {
        return -1;
    }
    return in_bytes;
}

HPacker::HPacker()
    : _encode_table(NULL)