Fixing markdown licensing && compilation issues.

include/cmark/cmark.c

@@ -0,0 +1,43 @@
+#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};
+
+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;
+}