1 files changed, 27 insertions, 0 deletions
diff --git a/cmark/wrappers/wrapper.rb b/cmark/wrappers/wrapper.rb
new file mode 100755
index 0000000000..597e234749
--- /dev/null
+++ b/cmark/wrappers/wrapper.rb
@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+require 'ffi'
+
+module CMark
+  extend FFI::Library
+
+  class Mem < FFI::Struct
+    layout :calloc, :pointer,
+           :realloc, :pointer,
+           :free, callback([:pointer], :void)
+  end
+
+  ffi_lib ['libcmark', 'cmark']
+  attach_function :cmark_get_default_mem_allocator, [], :pointer
+  attach_function :cmark_markdown_to_html, [:string, :size_t, :int], :pointer
+end
+
+def markdown_to_html(s)
+  len = s.bytesize
+  cstring = CMark::cmark_markdown_to_html(s, len, 0)
+  result = cstring.get_string(0)
+  mem = CMark::cmark_get_default_mem_allocator
+  CMark::Mem.new(mem)[:free].call(cstring)
+  result
+end
+
+STDOUT.write(markdown_to_html(ARGF.read()))