In SoftwareSerial::recv, only calculate the new tail once

This shortens the generated code a bit more.

1 files changed, 3 insertions, 2 deletions

diff --git a/libraries/SoftwareSerial/SoftwareSerial.cpp b/libraries/SoftwareSerial/SoftwareSerial.cpp
index cafd0c4..42f796b 100644
--- a/libraries/SoftwareSerial/SoftwareSerial.cpp
+++ b/libraries/SoftwareSerial/SoftwareSerial.cpp
@@ -259,11 +259,12 @@ void SoftwareSerial::recv()
       d = ~d;

 

     // if buffer full, set the overflow flag and return

-    if ((_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF != _receive_buffer_head) 

+    uint8_t next = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;

+    if (next != _receive_buffer_head)

     {

       // save new data in buffer: tail points to where byte goes

       _receive_buffer[_receive_buffer_tail] = d; // save new byte

-      _receive_buffer_tail = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;

+      _receive_buffer_tail = next;

     } 

     else 

     {