std::tuple<size_t, IOEvent> read_until_event(IInputStream& is, IOutputStream& os) {
if (os.is_write_nonblocking()) {
raise<IOError>("read_until_event will lose data if writing to non-blocking socket. Use a buffered approach instead.");
}
bool reading = true;
size_t total_read = 0;
size_t total_written = 0;
IOEvent reason;
byte buffer[1024];
while (reading) {
auto r = is.read(buffer, 1024);
either_switch(r,
[&](size_t n) {
total_written += n;
either_switch(os.write(buffer, n),
[&](size_t written) {
total_written += written;
},
[&](IOEvent wev) {
reason = wev;
reading = false;
}
);
},
[&](IOEvent event) {
reason = event;
reading = false;
}
);
}
return {total_written, reason};
}
ssize_t
InputStream_read(void *cookie, char *buf, size_t size)
{
IInputStream* input = (IInputStream*)cookie;
return input->read(buf, size);
}
