* string.c (rb_str_dump): fix expected length. [ruby-core:32935]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29622 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 5 deletions

diff --git a/string.c b/string.c
index daabb97a46..683c78c8cc 100644
--- a/string.c
+++ b/string.c
@@ -4315,12 +4315,11 @@ rb_str_dump(VALUE str)
 	    }
 	    else {
 		if (u8) {	/* \u{NN} */
-		    char buf[32];
 		    int n = rb_enc_precise_mbclen(p-1, pend, enc);
-		    if (MBCLEN_CHARFOUND_P(n)) {
-			int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
-			sprintf(buf, "%x", cc);
-			len += strlen(buf)+4;
+		    if (MBCLEN_CHARFOUND_P(n-1)) {
+			unsigned int cc = rb_enc_mbc_to_codepoint(p-1, pend, enc);
+			while (cc >>= 4) len++;
+			len += 5;
 			p += MBCLEN_CHARFOUND_LEN(n)-1;
 			break;
 		    }