ssize_t
gioReadData (GioEndpoint *endpoint, void *buffer, size_t size, int wait) {
ReadDataMethod *method = endpoint->methods->readData;
if (!method) return logUnsupportedOperation("readData");
{
unsigned char *start = buffer;
unsigned char *next = start;
while (size) {
{
unsigned int count = endpoint->input.to - endpoint->input.from;
if (count) {
if (count > size) count = size;
memcpy(next, &endpoint->input.buffer[endpoint->input.from], count);
endpoint->input.from += count;
next += count;
size -= count;
continue;
}
endpoint->input.from = endpoint->input.to = 0;
}
if (endpoint->input.error) {
if (next != start) break;
errno = endpoint->input.error;
endpoint->input.error = 0;
return -1;
}
{
ssize_t result = method(&endpoint->handle,
&endpoint->input.buffer[endpoint->input.to],
sizeof(endpoint->input.buffer) - endpoint->input.to,
(wait? endpoint->options.inputTimeout: 0), 0);
if (result > 0) {
if (LOG_CATEGORY_FLAG(GENERIC_INPUT)) {
logBytes(categoryLogLevel, "generic input", &endpoint->input.buffer[endpoint->input.to], result);
}
endpoint->input.to += result;
wait = 1;
} else {
if (!result) break;
if (errno == EAGAIN) break;
endpoint->input.error = errno;
}
}
}
if (next == start) errno = EAGAIN;
return next - start;
}
}
void
logInputPacket (const void *packet, size_t size) {
if (LOG_CATEGORY_FLAG(INPUT_PACKETS)) logPacket("Input Packet", packet, size);
}
void
logOutputPacket (const void *packet, size_t size) {
if (LOG_CATEGORY_FLAG(OUTPUT_PACKETS)) logPacket("Output Packet", packet, size);
}
