dc: make 4 % 0 emit error messgaes and set result to 0
function old new delta
mod 105 136 +31
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/miscutils/dc.c b/miscutils/dc.c
index 5119c13..5aef64b 100644
--- a/miscutils/dc.c
+++ b/miscutils/dc.c
@@ -94,13 +94,18 @@
{
data_t d = pop();
- //if (d == 0) {
- // bb_error_msg("remainder by zero");
- // pop();
- // push(0);
- // return;
- //}
- //^^^^ without this, we simply get SIGFPE and die
+ /* compat with dc (GNU bc 1.07.1) 1.4.1:
+ * $ dc -e '4 0 % p'
+ * dc: remainder by zero
+ * 0
+ */
+ if (d == 0) {
+ bb_error_msg("remainder by zero");
+ pop();
+ push(0);
+ return;
+ }
+ /* ^^^^ without this, we simply get SIGFPE and die */
push((data_t) pop() % d);
}
