cmark

 #include <stdlib.h>
 #include <assert.h>
 #include <stdio.h>
 #include "node.h"
 #include "houdini.h"
 #include "cmark.h"
 #include "buffer.h"
 
 int cmark_version() { return CMARK_VERSION; }
 
 const char *cmark_version_string() { return CMARK_VERSION_STRING; }
 
 static void *xcalloc(size_t nmem, size_t size) {
   void *ptr = calloc(nmem, size);
   if (!ptr) {
     fprintf(stderr, "[cmark] calloc returned null pointer, aborting\n");
     abort();
   }
   return ptr;
 }
 
 static void *xrealloc(void *ptr, size_t size) {
   void *new_ptr = realloc(ptr, size);
   if (!new_ptr) {
     fprintf(stderr, "[cmark] realloc returned null pointer, aborting\n");
     abort();
   }
   return new_ptr;
 }
 
 cmark_mem DEFAULT_MEM_ALLOCATOR = {xcalloc, xrealloc, free};
 
 cmark_mem *cmark_get_default_mem_allocator() {
   return &DEFAULT_MEM_ALLOCATOR;
 }
 
 
 char *cmark_markdown_to_html(const char *text, size_t len, int options) {
   cmark_node *doc;
   char *result;
 
   doc = cmark_parse_document(text, len, options);
 
   result = cmark_render_html(doc, options);
   cmark_node_free(doc);
 
   return result;
 }