Read implementation

gistfile1.cpp

ErrorCode Read(BufferedStream *s, void *buffer, size_t numBytes)
{
    U8 *dest = (U8 *)buffer;
    while (numBytes) {
        if (s->cursor == s->end)
            s->Refill(s);
        size_t count = min(numBytes, (size_t)(s->end - s->cursor));
        memcpy(dest, s->cursor, count);
        dest += count;
        s->cursor += count;
        numBytes -= count;
    }

    return s->error;
}