* bignum.c (rb_big2str0): do not clobber space for sign.

* sprintf.c (remove_sign_bits): extends sign bit first.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@14037 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/sprintf.c b/sprintf.c
index de997098ba..e32c456b63 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -18,6 +18,8 @@
 #include <math.h>
 
 #define BIT_DIGITS(N)   (((N)*146)/485 + 1)  /* log2(10) =~ 146/485 */
+#define BITSPERDIG (SIZEOF_BDIGITS*CHAR_BIT)
+#define EXTENDSIGN(n, l) (((~0 << (n)) >> (((n)*(l)) % BITSPERDIG)) & ~(~0 << (n)))
 
 static void fmt_setup _((char*,int,int,int,int));
 
@@ -36,7 +38,7 @@ remove_sign_bits(str, base)
 	}
     }
     else if (base == 8) {
-	if (*t == '3') t++;
+	*t |= EXTENDSIGN(3, strlen(t));
 	while (*t == '7') {
 	    t++;
 	}