-
-void reliable_read(raw_input_func_t* input_func, void* userdata, uint8_t* buf, size_t len)
-{
- while (len > 0) {
- ssize_t bytes_read = input_func(userdata, buf, len);
- assert(bytes_read <= (ssize_t)len);
-
- // TODO: We need better error handling here. setjmp()/longjmp()
- // should hopefully do the trick, but we need to take care for
- // suspension.
- if (bytes_read == (ssize_t)-1) {
- fprintf(stderr, "Input function returned error\n");
- exit(1);
- }
- if (bytes_read == 0) {
- fprintf(stderr, "Premature EOF\n");
- exit(1);
- }
-
- buf += bytes_read;
- len -= bytes_read;
- }
-}
-
-uint16_t read_length(raw_input_func_t* input_func, void* userdata)
-{
- uint8_t buf[2];
- reliable_read(input_func, userdata, buf, 2);
- return (buf[0] << 8) | buf[1];
-}