gistfile1.c

size_t
Recv()
{
    char* buffer;
   size_t length, l, i;
  ssize_t n;
  
  length = 512;
  buffer = malloc(length);
  
peek: n = recv(socket, buffer, length, MSG_PEEK);
  if (n < 0) {
    switch (errno) {
      case EINTR: goto peek;
      default: syslog(LOG_ERR, "Peek failed: %m");
    }
  }
  
  for (i = 0, l = n - 1; i <= l; i++) {
    if (i == l && l < length) break;
    if (i == l) goto kill;
    
    if (buffer[i] == '\r') { i++;
      if (buffer[i] != '\n') goto kill;
      
      goto read;
    }
  }
  
  goto peek;
  
read: n = recv(socket, buffer, length = i + 1, MSG_WAITALL);
  if (n < 0) {
    switch (errno) {
      case EINTR: goto read;
      default: syslog(LOG_ERR, "Read failed: %m");
    }
  }
  
  
  
  
kill:
  close(socket);
  return length;
}