From 870df461dd3008dd56c0147ddc2fd84688cdd9cb Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 15 Jun 2008 10:57:55 +0000
Subject: merge revision(s) 15575: 	* bignum.c (BIGZEROP): fix for longer
 Bignum zeros.  [ruby-Bugs-17454]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@17202 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 bignum.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

(limited to 'bignum.c')

diff --git a/bignum.c b/bignum.c
index 70a88e64d9..e3d531ceaf 100644
--- a/bignum.c
+++ b/bignum.c
@@ -36,7 +36,21 @@ VALUE rb_cBignum;
 #define BIGLO(x) ((BDIGIT)((x) & (BIGRAD-1)))
 #define BDIGMAX ((BDIGIT)-1)
 
-#define BIGZEROP(x) (RBIGNUM(x)->len == 0 || (RBIGNUM(x)->len == 1 && BDIGITS(x)[0] == 0))
+#define BIGZEROP(x) (RBIGNUM(x)->len == 0 || \
+		     (BDIGITS(x)[0] == 0 && \
+		      (RBIGNUM(x)->len == 1 || bigzero_p(x))))
+
+static int bigzero_p(VALUE);
+static int
+bigzero_p(x)
+    VALUE x;
+{
+    long i;
+    for (i = 0; i < RBIGNUM(x)->len; ++i) {
+	if (BDIGITS(x)[i]) return 0;
+    }
+    return 1;
+}
 
 static VALUE
 bignew_1(klass, len, sign)
-- 
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