* io.c (rb_io_putc): support multibyte characters.

  [ruby-core:30697]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29447 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 3 deletions

diff --git a/io.c b/io.c
index 7255fc46f4..7625796b2b 100644
--- a/io.c
+++ b/io.c
@@ -6053,9 +6053,15 @@ rb_f_print(int argc, VALUE *argv)
 static VALUE
 rb_io_putc(VALUE io, VALUE ch)
 {
-    char c = NUM2CHR(ch);
-
-    rb_io_write(io, rb_str_new(&c, 1));
+    VALUE str;
+    if (TYPE(ch) == T_STRING) {
+	str = rb_str_substr(ch, 0, 1);
+    }
+    else {
+	char c = NUM2CHR(ch);
+	str = rb_str_new(&c, 1);
+    }
+    rb_io_write(io, str);
     return ch;
 }