awk: bitwise ops cast oprands and results to unsigned long,

 not signed. closes 4774.

1 files changed, 8 insertions, 6 deletions

diff --git a/editors/awk.c b/editors/awk.c
index 19f48401e..72eca245f 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -2039,28 +2039,30 @@ static var *exec_builtin(node *op, var *res)
                 setvar_p(res, s);
                 break;
 
+        /* Bitwise ops must assume that operands are unsigned. GNU Awk 3.1.5:
+         * awk '{ print or(-1,1) }' gives "4.29497e+09", not "-2.xxxe+09" */
         case B_an:
-                setvar_i(res, (long)getvar_i(av[0]) & (long)getvar_i(av[1]));
+                setvar_i(res, (unsigned long)getvar_i(av[0]) & (unsigned long)getvar_i(av[1]));
                 break;
 
         case B_co:
-                setvar_i(res, ~(long)getvar_i(av[0]));
+                setvar_i(res, ~(unsigned long)getvar_i(av[0]));
                 break;
 
         case B_ls:
-                setvar_i(res, (long)getvar_i(av[0]) << (long)getvar_i(av[1]));
+                setvar_i(res, (unsigned long)getvar_i(av[0]) << (unsigned long)getvar_i(av[1]));
                 break;
 
         case B_or:
-                setvar_i(res, (long)getvar_i(av[0]) | (long)getvar_i(av[1]));
+                setvar_i(res, (unsigned long)getvar_i(av[0]) | (unsigned long)getvar_i(av[1]));
                 break;
 
         case B_rs:
-                setvar_i(res, (long)((unsigned long)getvar_i(av[0]) >> (unsigned long)getvar_i(av[1])));
+                setvar_i(res, (unsigned long)getvar_i(av[0]) >> (unsigned long)getvar_i(av[1]));
                 break;
 
         case B_xo:
-                setvar_i(res, (long)getvar_i(av[0]) ^ (long)getvar_i(av[1]));
+                setvar_i(res, (unsigned long)getvar_i(av[0]) ^ (unsigned long)getvar_i(av[1]));
                 break;
 
         case B_lo: