bc: rewrite another for() loop

function                                             old     new   delta
zbc_num_d                                            570     563      -7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 6c63c1703..0cd8ba6b4 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -1933,7 +1933,6 @@ static FAST_FUNC BC_STATUS zbc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size
         BcDig *n, *p, q;
         size_t len, end, i;
         BcNum cp;
-        bool zero = true;
 
         if (b->len == 0)
                 RETURN_STATUS(bc_error("divide by zero"));
@@ -1961,8 +1960,13 @@ static FAST_FUNC BC_STATUS zbc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size
         if (scale > cp.rdx) bc_num_extend(&cp, scale - cp.rdx);
 
         if (b->rdx == b->len) {
-                for (i = 0; zero && i < len; ++i) zero = !b->num[len - i - 1];
-                len -= i - 1;
+                for (;;) {
+                        if (len == 0) break;
+                        len--;
+                        if (b->num[len] != 0)
+                                break;
+                }
+                len++;
         }
 
         if (cp.cap == cp.len) bc_num_expand(&cp, cp.len + 1);