2 files changed, 32 insertions, 0 deletions
diff --git a/ext/-test-/printf/extconf.rb b/ext/-test-/printf/extconf.rb
new file mode 100644
index 0000000000..7b96da0c85
--- /dev/null
+++ b/ext/-test-/printf/extconf.rb
@@ -0,0 +1 @@
+create_makefile("-test-/printf")
diff --git a/ext/-test-/printf/printf.c b/ext/-test-/printf/printf.c
new file mode 100644
index 0000000000..f338637e04
--- /dev/null
+++ b/ext/-test-/printf/printf.c
@@ -0,0 +1,31 @@
+#include <ruby.h>
+#include <ruby/encoding.h>
+
+static VALUE
+printf_i(VALUE self, VALUE obj)
+{
+    char buf[256];
+    snprintf(buf, sizeof(buf), "<%"PRIsVALUE">", obj);
+    return rb_usascii_str_new2(buf);
+}
+
+static VALUE
+printf_s(VALUE self, VALUE obj)
+{
+    return rb_enc_sprintf(rb_usascii_encoding(), "<%"PRIsVALUE">", obj);
+}
+
+static VALUE
+printf_v(VALUE self, VALUE obj)
+{
+    return rb_enc_sprintf(rb_usascii_encoding(), "{%+"PRIsVALUE"}", obj);
+}
+
+void
+Init_printf(void)
+{
+    VALUE m = rb_define_module_under(rb_define_module("Bug"), "Printf");
+    rb_define_singleton_method(m, "i", printf_i, 1);
+    rb_define_singleton_method(m, "s", printf_s, 1);
+    rb_define_singleton_method(m, "v", printf_v, 1);
+}