Bugfix: getBaud() now works on mac, and only check for appropriate baud rate (#106)

Closes #1 
Closes #104

Author: dcyoung

libsweep/src/unix/serial.cc

@@ -22,201 +22,11 @@ struct device {
 
 static speed_t get_baud(int32_t bitrate) {
   SWEEP_ASSERT(bitrate > 0);
-
-  speed_t baud;
-
-  switch (bitrate) {
-#ifdef B0
-  case 0:
-    baud = B0;
-    break;
-#endif
-#ifdef B50
-  case 50:
-    baud = B50;
-    break;
-#endif
-#ifdef B75
-  case 75:
-    baud = B75;
-    break;
-#endif
-#ifdef B110
-  case 110:
-    baud = B110;
-    break;
-#endif
-#ifdef B134
-  case 134:
-    baud = B134;
-    break;
-#endif
-#ifdef B150
-  case 150:
-    baud = B150;
-    break;
-#endif
-#ifdef B200
-  case 200:
-    baud = B200;
-    break;
-#endif
-#ifdef B300
-  case 300:
-    baud = B300;
-    break;
-#endif
-#ifdef B600
-  case 600:
-    baud = B600;
-    break;
-#endif
-#ifdef B1200
-  case 1200:
-    baud = B1200;
-    break;
-#endif
-#ifdef B1800
-  case 1800:
-    baud = B1800;
-    break;
-#endif
-#ifdef B2400
-  case 2400:
-    baud = B2400;
-    break;
-#endif
-#ifdef B4800
-  case 4800:
-    baud = B4800;
-    break;
-#endif
-#ifdef B7200
-  case 7200:
-    baud = B7200;
-    break;
-#endif
-#ifdef B9600
-  case 9600:
-    baud = B9600;
-    break;
-#endif
-#ifdef B14400
-  case 14400:
-    baud = B14400;
-    break;
-#endif
-#ifdef B19200
-  case 19200:
-    baud = B19200;
-    break;
-#endif
-#ifdef B28800
-  case 28800:
-    baud = B28800;
-    break;
-#endif
-#ifdef B57600
-  case 57600:
-    baud = B57600;
-    break;
-#endif
-#ifdef B76800
-  case 76800:
-    baud = B76800;
-    break;
-#endif
-#ifdef B38400
-  case 38400:
-    baud = B38400;
-    break;
-#endif
-#ifdef B115200
-  case 115200:
-    baud = B115200;
-    break;
-#endif
-#ifdef B128000
-  case 128000:
-    baud = B128000;
-    break;
-#endif
-#ifdef B153600
-  case 153600:
-    baud = B153600;
-    break;
-#endif
-#ifdef B230400
-  case 230400:
-    baud = B230400;
-    break;
-#endif
-#ifdef B256000
-  case 256000:
-    baud = B256000;
-    break;
-#endif
-#ifdef B460800
-  case 460800:
-    baud = B460800;
-    break;
-#endif
-#ifdef B576000
-  case 576000:
-    baud = B576000;
-    break;
-#endif
-#ifdef B921600
-  case 921600:
-    baud = B921600;
-    break;
-#endif
-#ifdef B1000000
-  case 1000000:
-    baud = B1000000;
-    break;
-#endif
-#ifdef B1152000
-  case 1152000:
-    baud = B1152000;
-    break;
-#endif
-#ifdef B1500000
-  case 1500000:
-    baud = B1500000;
-    break;
-#endif
-#ifdef B2000000
-  case 2000000:
-    baud = B2000000;
-    break;
-#endif
-#ifdef B2500000
-  case 2500000:
-    baud = B2500000;
-    break;
-#endif
-#ifdef B3000000
-  case 3000000:
-    baud = B3000000;
-    break;
-#endif
-#ifdef B3500000
-  case 3500000:
-    baud = B3500000;
-    break;
-#endif
-#ifdef B4000000
-  case 4000000:
-    baud = B4000000;
-    break;
-#endif
-  default:
-    throw error{"baud rate could not be determined"};
-    baud = -1;
+  if (bitrate != 115200) {
+    throw error{"Only baud rate 115200 is supported at this time."};
+    return -1;
   }
-
-  return baud;
+  return bitrate;
 }
 
 static bool wait_readable(device_s serial) {