Plc StrAdd bugfix for too long strings

eabf682a · Claes Sjofors · 0adb7804 · eabf682a
Commit eabf682a authored Mar 27, 2015 by Claes Sjofors
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src/lib/rt/src/rt_plc_arithm.c src/lib/rt/src/rt_plc_arithm.c +1 -1

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--- a/src/lib/rt/src/rt_plc_arithm.c
+++ b/src/lib/rt/src/rt_plc_arithm.c
@@ -1573,7 +1573,7 @@ void StrAdd_exec(
  pwr_tString80 sum = "";

  for ( i = 0; i < STRADD_SIZE; i++) {
-    strncat( sum, **inp, sizeof(sum));
+    strncat( sum, **inp, sizeof(sum)-strlen(sum)-1);
    
    inp = (pwr_tString80 **)((char *)inp + pwr_cInputOffsetStr);
  }