bc: simplify zbc_parse_break_or_continue(), logic is the same

function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2259    2224     -35
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-35)             Total: -35 bytes
   text	   data	    bss	    dec	    hex	filename
 982218	    485	   7296	 989999	  f1b2f	busybox_old
 982183	    485	   7296	 989964	  f1b0c	busybox_unstripped

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

1 files changed, 10 insertions, 11 deletions

diff --git a/miscutils/bc.c b/miscutils/bc.c
index 9ce6ab667..8aaeeaf9f 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -4358,20 +4358,19 @@ static BC_STATUS zbc_parse_break_or_continue(BcParse *p, BcLexType type)
 {
         BcStatus s;
         size_t i;
-        BcInstPtr *ip;
 
         if (type == BC_LEX_KEY_BREAK) {
-                if (p->exits.len == 0) RETURN_STATUS(bc_error_bad_token());
-
-                i = p->exits.len - 1;
-                ip = bc_vec_item(&p->exits, i);
-
-                while (!ip->func && i < p->exits.len)
-                        ip = bc_vec_item(&p->exits, i--);
-                if (i >= p->exits.len && !ip->func)
-                        RETURN_STATUS(bc_error_bad_token());
+                BcInstPtr *ipp;
 
-                i = ip->idx;
+                i = p->exits.len;
+                for (;;) {
+                        if (i == 0) // none of the enclosing blocks is a loop
+                                RETURN_STATUS(bc_error_bad_token());
+                        ipp = bc_vec_item(&p->exits, --i);
+                        if (ipp->func != 0)
+                                break;
+                }
+                i = ipp->idx;
         }
         else
                 i = *((size_t *) bc_vec_top(&p->conds));