Method FindByte

src/streams.h:622–642

search for a given byte in the stream, and remain positioned on it

    //! search for a given byte in the stream, and remain positioned on it
    void FindByte(std::byte byte)
    {
        // For best performance, avoid mod operation within the loop.
        size_t buf_offset{size_t(m_read_pos % uint64_t(vchBuf.size()))};
        while (true) {
            if (m_read_pos == nSrcPos) {
                // No more bytes available; read from the file into the buffer,
                // setting nSrcPos to one beyond the end of the new data.
                // Throws exception if end-of-file reached.
                Fill();
            }
            const size_t len{std::min<size_t>(vchBuf.size() - buf_offset, nSrcPos - m_read_pos)};
            const auto it_start{vchBuf.begin() + buf_offset};
            const auto it_find{std::find(it_start, it_start + len, byte)};
            const size_t inc{size_t(std::distance(it_start, it_find))};
            m_read_pos += inc;
            if (inc < len) break;
            buf_offset += inc;
            if (buf_offset >= vchBuf.size()) buf_offset = 0;
        }
    }
};

/**