io.c: simplified pipe_del_fptr

* io.c (pipe_del_fptr): merged code for the case fptr is first to
  the loop for the rest.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62120 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 12 deletions

diff --git a/io.c b/io.c
index dde980880c..6bcce27bb7 100644
--- a/io.c
+++ b/io.c
@@ -6150,23 +6150,16 @@ pipe_add_fptr(rb_io_t *fptr)
 static void
 pipe_del_fptr(rb_io_t *fptr)
 {
-    struct pipe_list *list = pipe_list;
+    struct pipe_list **prev = &pipe_list;
     struct pipe_list *tmp;
 
-    if (list->fptr == fptr) {
-	pipe_list = list->next;
-	free(list);
-	return;
-    }
-
-    while (list->next) {
-	if (list->next->fptr == fptr) {
-	    tmp = list->next;
-	    list->next = list->next->next;
+    while ((tmp = *prev) != 0) {
+	if (tmp->fptr == fptr) {
+	    *prev = tmp->next;
 	    free(tmp);
 	    return;
 	}
-	list = list->next;
+	prev = &tmp->next;
     }
 }