added easy render() function

1 files changed, 21 insertions, 1 deletions

diff --git a/init.lua b/init.lua
index 11e051e..c7f4742 100644
--- a/init.lua
+++ b/init.lua
@@ -3,6 +3,26 @@ local ffi = require 'ffi'
 require 'sundown.sdcdefs'
 require 'sundown.htmlcdefs'
 
-local sundown = ffi.load(package.searchpath('libsundown', package.cpath))
+local C = ffi.load(package.searchpath('libsundown', package.cpath))
+local sundown = {C=C}
+
+function sundown.render(txt)
+   local callbacks = ffi.new('struct sd_callbacks')
+   local options = ffi.new('struct sdhtml_renderopt')
+   C.sdhtml_renderer(callbacks, options, 0)
+
+   local markdown = C.sd_markdown_new(0xfff, 16, callbacks, options)
+
+   local outbuf = ffi.new('struct sd_buf')
+   outbuf.data = nil
+   outbuf.size = 0
+   outbuf.asize = 0
+   outbuf.unit = 64
+
+   C.sd_markdown_render(outbuf, ffi.cast('const char*', txt), #txt, markdown)
+   C.sd_markdown_free(markdown)
+
+   return ffi.string(outbuf.data, outbuf.size)
+end
 
 return sundown