Fixing markdown licensing && compilation issues.

include/cmark/houdini.h

@@ -0,0 +1,51 @@
+#ifndef CMARK_HOUDINI_H
+#define CMARK_HOUDINI_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include "config.h"
+#include "buffer.h"
+
+#ifdef HAVE___BUILTIN_EXPECT
+#define likely(x) __builtin_expect((x), 1)
+#define unlikely(x) __builtin_expect((x), 0)
+#else
+#define likely(x) (x)
+#define unlikely(x) (x)
+#endif
+
+#ifdef HOUDINI_USE_LOCALE
+#define _isxdigit(c) isxdigit(c)
+#define _isdigit(c) isdigit(c)
+#else
+/*
+ * Helper _isdigit methods -- do not trust the current locale
+ * */
+#define _isxdigit(c) (strchr("0123456789ABCDEFabcdef", (c)) != NULL)
+#define _isdigit(c) ((c) >= '0' && (c) <= '9')
+#endif
+
+#define HOUDINI_ESCAPED_SIZE(x) (((x)*12) / 10)
+#define HOUDINI_UNESCAPED_SIZE(x) (x)
+
+extern bufsize_t houdini_unescape_ent(cmark_strbuf *ob, const uint8_t *src,
+                                      bufsize_t size);
+extern int houdini_escape_html(cmark_strbuf *ob, const uint8_t *src,
+                               bufsize_t size);
+extern int houdini_escape_html0(cmark_strbuf *ob, const uint8_t *src,
+                                bufsize_t size, int secure);
+extern int houdini_unescape_html(cmark_strbuf *ob, const uint8_t *src,
+                                 bufsize_t size);
+extern void houdini_unescape_html_f(cmark_strbuf *ob, const uint8_t *src,
+                                    bufsize_t size);
+extern int houdini_escape_href(cmark_strbuf *ob, const uint8_t *src,
+                               bufsize_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif