From ff715f77854c84ef7bce446ca5b48190d64b45a9 Mon Sep 17 00:00:00 2001
From: Petr Mrázek <peterix@gmail.com>
Date: Sat, 16 May 2015 23:04:00 +0200
Subject: NOISSUE replace derpy merkdown thing with hoedown

---
 CMakeLists.txt                         |    4 +-
 application/CMakeLists.txt             |    1 +
 application/dialogs/UpdateDialog.cpp   |  201 +--
 depends/hoedown/CMakeLists.txt         |   29 +
 depends/hoedown/LICENSE                |   15 +
 depends/hoedown/README.md              |    9 +
 depends/hoedown/hoedown/autolink.h     |   46 +
 depends/hoedown/hoedown/buffer.h       |  134 ++
 depends/hoedown/hoedown/document.h     |  172 ++
 depends/hoedown/hoedown/escape.h       |   28 +
 depends/hoedown/hoedown/html.h         |   84 +
 depends/hoedown/hoedown/stack.h        |   52 +
 depends/hoedown/hoedown/version.h      |   33 +
 depends/hoedown/src/autolink.c         |  281 +++
 depends/hoedown/src/buffer.c           |  308 ++++
 depends/hoedown/src/document.c         | 2958 ++++++++++++++++++++++++++++++++
 depends/hoedown/src/escape.c           |  188 ++
 depends/hoedown/src/html.c             |  754 ++++++++
 depends/hoedown/src/html_blocks.c      |  240 +++
 depends/hoedown/src/html_smartypants.c |  435 +++++
 depends/hoedown/src/stack.c            |   79 +
 depends/hoedown/src/version.c          |    9 +
 22 files changed, 5915 insertions(+), 145 deletions(-)
 create mode 100644 depends/hoedown/CMakeLists.txt
 create mode 100644 depends/hoedown/LICENSE
 create mode 100644 depends/hoedown/README.md
 create mode 100644 depends/hoedown/hoedown/autolink.h
 create mode 100644 depends/hoedown/hoedown/buffer.h
 create mode 100644 depends/hoedown/hoedown/document.h
 create mode 100644 depends/hoedown/hoedown/escape.h
 create mode 100644 depends/hoedown/hoedown/html.h
 create mode 100644 depends/hoedown/hoedown/stack.h
 create mode 100644 depends/hoedown/hoedown/version.h
 create mode 100644 depends/hoedown/src/autolink.c
 create mode 100644 depends/hoedown/src/buffer.c
 create mode 100644 depends/hoedown/src/document.c
 create mode 100644 depends/hoedown/src/escape.c
 create mode 100644 depends/hoedown/src/html.c
 create mode 100644 depends/hoedown/src/html_blocks.c
 create mode 100644 depends/hoedown/src/html_smartypants.c
 create mode 100644 depends/hoedown/src/stack.c
 create mode 100644 depends/hoedown/src/version.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a21f23c3..fde28a4c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,7 +92,9 @@ else()
 set(QUAZIP_LIBRARIES -L"${CMAKE_BINARY_DIR}/External/Install/QuaZIP/lib" quazip)
 endif()
 
-
+# Add the markdown parser thing
+add_subdirectory(depends/hoedown)
+include_directories(${HOEDOWN_INCLUDE_DIR})
 
 # Add the java launcher and checker
 add_subdirectory(depends/launcher)
diff --git a/application/CMakeLists.txt b/application/CMakeLists.txt
index f0dc8460..b179927f 100644
--- a/application/CMakeLists.txt
+++ b/application/CMakeLists.txt
@@ -345,6 +345,7 @@ qt5_add_resources(MULTIMC_RESOURCES ${MULTIMC_QRCS})
 add_executable(MultiMC MACOSX_BUNDLE WIN32 ${MULTIMC_SOURCES} ${MULTIMC_UI} ${MULTIMC_RESOURCES} ${MULTIMC_RCS})
 target_link_libraries(MultiMC MultiMC_logic xz-embedded unpack200 iconfix libUtil LogicalGui
 	${QUAZIP_LIBRARIES} Qt5::Core Qt5::Xml Qt5::Widgets Qt5::Network Qt5::Concurrent
+	hoedown
 		${MultiMC_LINK_ADDITIONAL_LIBS})
 
 ################################ INSTALLATION AND PACKAGING ################################
diff --git a/application/dialogs/UpdateDialog.cpp b/application/dialogs/UpdateDialog.cpp
index 37e44b1e..d8f5d8ac 100644
--- a/application/dialogs/UpdateDialog.cpp
+++ b/application/dialogs/UpdateDialog.cpp
@@ -5,6 +5,9 @@
 #include "MultiMC.h"
 #include <settings/SettingsObject.h>
 
+#include <hoedown/html.h>
+#include <hoedown/document.h>
+
 UpdateDialog::UpdateDialog(bool hasUpdate, QWidget *parent) : QDialog(parent), ui(new Ui::UpdateDialog)
 {
 	MultiMCPlatform::fixWM_CLASS(this);
@@ -39,166 +42,76 @@ void UpdateDialog::loadChangelog()
 	dljob->start();
 }
 
-// TODO: this will be replaced.
-QString reprocessMarkdown(QString markdown)
+/**
+ * hoedown wrapper, because dealing with resource lifetime in C is stupid
+ */
+class HoeDown
 {
-	QString htmlData;
-	QTextStream html(&htmlData);
-	auto lines = markdown.split(QRegExp("[\r]?[\n]"),QString::KeepEmptyParts);
-	enum
-	{
-		BASE,
-		LIST1,
-		LIST2
-	}state = BASE;
-	html << "<html>";
-	int i = 0;
-	auto procLine = [&](QString line) -> QString
+public:
+	class buffer
 	{
-		// [GitHub issues](https://github.com/MultiMC/MultiMC5/issues)
-		line.replace(QRegExp("\\[([^\\]]+)\\]\\(([^\\)]+)\\)"), "<a href=\"\\2\">\\1</a>");
-		line.replace(QRegExp("GH-([0-9]+)"), "<a href=\"https://github.com/MultiMC/MultiMC5/issues/\\1\">GH-\\1</a>");
-		line.replace(QRegExp("\\*\\*([^*]+)\\*\\*"), "<b>\\1</b>");
-		line.replace(QRegExp("\\*([^*]+)\\*"), "<i>\\1</i>");
-		return line;
-	};
-	for(auto line: lines)
-	{
-		if(line.isEmpty())
+	public:
+		buffer(size_t unit = 4096)
 		{
-			// html << "<br />\n";
+			buf = hoedown_buffer_new(unit);
 		}
-		else switch (state)
+		~buffer()
 		{
-			case BASE:
-				if(line.startsWith("####"))
-				{
-					html << "<h4>" << procLine(line.mid(4)) << "</h4>\n";
-				}
-				if(line.startsWith("###"))
-				{
-					html << "<h3>" << procLine(line.mid(3)) << "</h3>\n";
-				}
-				if(line.startsWith("##"))
-				{
-					html << "<h2>" << procLine(line.mid(2)) << "</h2>\n";
-				}
-				else if(line.startsWith("#"))
-				{
-					html << "<h1>" << procLine(line.mid(1)) << "</h1>\n";
-				}
-				else if(line.startsWith("- "))
-				{
-					state = LIST1;
-					html << "<ul>\n";
-					html << "<li>" << procLine(line.mid(2)) << "</li>\n";
-				}
-				else qCritical() << "Invalid input on line " << i << ": " << line;
-				break;
-			case LIST1:
-				if(line.startsWith("####"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "<h4>" << procLine(line.mid(4)) << "</h4>\n";
-				}
-				else if(line.startsWith("###"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "<h3>" << procLine(line.mid(3)) << "</h3>\n";
-				}
-				if(line.startsWith("##"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "<h2>" << procLine(line.mid(2)) << "</h2>\n";
-				}
-				else if(line.startsWith("#"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "<h1>" << procLine(line.mid(1)) << "</h1>\n";
-				}
-				else if(line.startsWith("- "))
-				{
-					html << "<li>" << procLine(line.mid(2)) << "</li>\n";
-				}
-				else if(line.startsWith("  - "))
-				{
-					state = LIST2;
-					html << "<ul>\n";
-					html << "<li>" << procLine(line.mid(4)) << "</li>\n";
-				}
-				else qCritical() << "Invalid input on line " << i << ": " << line;
-				break;
-			case LIST2:
-				if(line.startsWith("####"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "</ul>\n";
-					html << "<h4>" << procLine(line.mid(4)) << "</h4>\n";
-				}
-				else if(line.startsWith("###"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "</ul>\n";
-					html << "<h3>" << procLine(line.mid(3)) << "</h3>\n";
-				}
-				if(line.startsWith("##"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "</ul>\n";
-					html << "<h2>" << procLine(line.mid(2)) << "</h2>\n";
-				}
-				else if(line.startsWith("#"))
-				{
-					state = BASE;
-					html << "</ul>\n";
-					html << "</ul>\n";
-					html << "<h1>" << procLine(line.mid(1)) << "</h1>\n";
-				}
-				else if(line.startsWith("- "))
-				{
-					state = LIST1;
-					html << "</ul>\n";
-					html << "<li>" << procLine(line.mid(2)) << "</li>\n";
-				}
-				else if(line.startsWith("  - "))
-				{
-					html << "<li>" << procLine(line.mid(4)) << "</li>\n";
-				}
-				else qCritical() << "Invalid input on line " << i << ": " << line;
-				break;
+			hoedown_buffer_free(buf);
 		}
-		i++;
-	}
-	if(state == LIST2)
+		const char * cstr()
+		{
+			return hoedown_buffer_cstr(buf);
+		}
+		void put(QByteArray input)
+		{
+			hoedown_buffer_put(buf, (uint8_t *) input.data(), input.size());
+		}
+		const uint8_t * data() const
+		{
+			return buf->data;
+		}
+		size_t size() const
+		{
+			return buf->size;
+		}
+		hoedown_buffer * buf;
+	} ib, ob;
+	HoeDown()
 	{
-		html << "</ul>\n";
-		state = LIST1;
+		renderer = hoedown_html_renderer_new((hoedown_html_flags) 0,0);
+		document = hoedown_document_new(renderer, (hoedown_extensions) 0, 8);
 	}
-	if(state == LIST1)
+	~HoeDown()
 	{
-		html << "</ul>\n";
-		state = BASE;
+		hoedown_document_free(document);
+		hoedown_html_renderer_free(renderer);
 	}
-	if (state != BASE)
+	QString process(QByteArray input)
 	{
-		qCritical() << "Reprocessing markdown didn't end in a final state!";
+		ib.put(input);
+		hoedown_document_render(document, ob.buf, ib.data(), ib.size());
+		return ob.cstr();
 	}
-	html << "</html>\n";
-	qDebug() << htmlData;
-	return htmlData;
+private:
+	hoedown_document * document;
+	hoedown_renderer * renderer;
+};
+
+QString reprocessMarkdown(QByteArray markdown)
+{
+	HoeDown hoedown;
+	QString output = hoedown.process(markdown);
+
+	// HACK: easier than customizing hoedown
+	output.replace(QRegExp("GH-([0-9]+)"), "<a href=\"https://github.com/MultiMC/MultiMC5/issues/\\1\">GH-\\1</a>");
+	qDebug() << output;
+	return output;
 }
 
 void UpdateDialog::changelogLoaded()
 {
-	auto rawMarkdown = QString::fromUtf8(changelogDownload->m_data);
-	auto html = reprocessMarkdown(rawMarkdown);
+	auto html = reprocessMarkdown(changelogDownload->m_data);
 	ui->changelogBrowser->setHtml(html);
 }
 
diff --git a/depends/hoedown/CMakeLists.txt b/depends/hoedown/CMakeLists.txt
new file mode 100644
index 00000000..b4ef8ef9
--- /dev/null
+++ b/depends/hoedown/CMakeLists.txt
@@ -0,0 +1,29 @@
+# hoedown 3.0.2 - https://github.com/hoedown/hoedown/archive/3.0.2.tar.gz
+project(hoedown)
+
+set(HOEDOWN_SOURCES
+hoedown/autolink.h
+hoedown/buffer.h
+hoedown/document.h
+hoedown/escape.h
+hoedown/html.h
+hoedown/stack.h
+hoedown/version.h
+src/autolink.c
+src/buffer.c
+src/document.c
+src/escape.c
+src/html.c
+src/html_blocks.c
+src/html_smartypants.c
+src/stack.c
+src/version.c
+)
+
+# Set the include dir path.
+set(HOEDOWN_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}" PARENT_SCOPE)
+
+# Include self.
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+
+add_library(hoedown STATIC ${HOEDOWN_SOURCES})
diff --git a/depends/hoedown/LICENSE b/depends/hoedown/LICENSE
new file mode 100644
index 00000000..4e75de4d
--- /dev/null
+++ b/depends/hoedown/LICENSE
@@ -0,0 +1,15 @@
+Copyright (c) 2008, Natacha Porté
+Copyright (c) 2011, Vicent Martí
+Copyright (c) 2014, Xavier Mendez, Devin Torres and the Hoedown authors
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/depends/hoedown/README.md b/depends/hoedown/README.md
new file mode 100644
index 00000000..abe2b6ca
--- /dev/null
+++ b/depends/hoedown/README.md
@@ -0,0 +1,9 @@
+Hoedown
+=======
+
+This is Hoedown 3.0.2, taken from [the hoedown github repo](https://github.com/hoedown/hoedown).
+
+`Hoedown` is a revived fork of [Sundown](https://github.com/vmg/sundown),
+the Markdown parser based on the original code of the
+[Upskirt library](http://fossil.instinctive.eu/libupskirt/index)
+by Natacha Porté.
diff --git a/depends/hoedown/hoedown/autolink.h b/depends/hoedown/hoedown/autolink.h
new file mode 100644
index 00000000..528885c9
--- /dev/null
+++ b/depends/hoedown/hoedown/autolink.h
@@ -0,0 +1,46 @@
+/* autolink.h - versatile autolinker */
+
+#ifndef HOEDOWN_AUTOLINK_H
+#define HOEDOWN_AUTOLINK_H
+
+#include "buffer.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*************
+ * CONSTANTS *
+ *************/
+
+typedef enum hoedown_autolink_flags {
+	HOEDOWN_AUTOLINK_SHORT_DOMAINS = (1 << 0)
+} hoedown_autolink_flags;
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* hoedown_autolink_is_safe: verify that a URL has a safe protocol */
+int hoedown_autolink_is_safe(const uint8_t *data, size_t size);
+
+/* hoedown_autolink__www: search for the next www link in data */
+size_t hoedown_autolink__www(size_t *rewind_p, hoedown_buffer *link,
+	uint8_t *data, size_t offset, size_t size, hoedown_autolink_flags flags);
+
+/* hoedown_autolink__email: search for the next email in data */
+size_t hoedown_autolink__email(size_t *rewind_p, hoedown_buffer *link,
+	uint8_t *data, size_t offset, size_t size, hoedown_autolink_flags flags);
+
+/* hoedown_autolink__url: search for the next URL in data */
+size_t hoedown_autolink__url(size_t *rewind_p, hoedown_buffer *link,
+	uint8_t *data, size_t offset, size_t size, hoedown_autolink_flags flags);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_AUTOLINK_H **/
diff --git a/depends/hoedown/hoedown/buffer.h b/depends/hoedown/hoedown/buffer.h
new file mode 100644
index 00000000..d7703f8d
--- /dev/null
+++ b/depends/hoedown/hoedown/buffer.h
@@ -0,0 +1,134 @@
+/* buffer.h - simple, fast buffers */
+
+#ifndef HOEDOWN_BUFFER_H
+#define HOEDOWN_BUFFER_H
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(_MSC_VER)
+#define __attribute__(x)
+#define inline __inline
+#define __builtin_expect(x,n) x
+#endif
+
+
+/*********
+ * TYPES *
+ *********/
+
+typedef void *(*hoedown_realloc_callback)(void *, size_t);
+typedef void (*hoedown_free_callback)(void *);
+
+struct hoedown_buffer {
+	uint8_t *data;	/* actual character data */
+	size_t size;	/* size of the string */
+	size_t asize;	/* allocated size (0 = volatile buffer) */
+	size_t unit;	/* reallocation unit size (0 = read-only buffer) */
+
+	hoedown_realloc_callback data_realloc;
+	hoedown_free_callback data_free;
+	hoedown_free_callback buffer_free;
+};
+
+typedef struct hoedown_buffer hoedown_buffer;
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* allocation wrappers */
+void *hoedown_malloc(size_t size) __attribute__ ((malloc));
+void *hoedown_calloc(size_t nmemb, size_t size) __attribute__ ((malloc));
+void *hoedown_realloc(void *ptr, size_t size) __attribute__ ((malloc));
+
+/* hoedown_buffer_init: initialize a buffer with custom allocators */
+void hoedown_buffer_init(
+	hoedown_buffer *buffer,
+	size_t unit,
+	hoedown_realloc_callback data_realloc,
+	hoedown_free_callback data_free,
+	hoedown_free_callback buffer_free
+);
+
+/* hoedown_buffer_uninit: uninitialize an existing buffer */
+void hoedown_buffer_uninit(hoedown_buffer *buf);
+
+/* hoedown_buffer_new: allocate a new buffer */
+hoedown_buffer *hoedown_buffer_new(size_t unit) __attribute__ ((malloc));
+
+/* hoedown_buffer_reset: free internal data of the buffer */
+void hoedown_buffer_reset(hoedown_buffer *buf);
+
+/* hoedown_buffer_grow: increase the allocated size to the given value */
+void hoedown_buffer_grow(hoedown_buffer *buf, size_t neosz);
+
+/* hoedown_buffer_put: append raw data to a buffer */
+void hoedown_buffer_put(hoedown_buffer *buf, const uint8_t *data, size_t size);
+
+/* hoedown_buffer_puts: append a NUL-terminated string to a buffer */
+void hoedown_buffer_puts(hoedown_buffer *buf, const char *str);
+
+/* hoedown_buffer_putc: append a single char to a buffer */
+void hoedown_buffer_putc(hoedown_buffer *buf, uint8_t c);
+
+/* hoedown_buffer_putf: read from a file and append to a buffer, until EOF or error */
+int hoedown_buffer_putf(hoedown_buffer *buf, FILE* file);
+
+/* hoedown_buffer_set: replace the buffer's contents with raw data */
+void hoedown_buffer_set(hoedown_buffer *buf, const uint8_t *data, size_t size);
+
+/* hoedown_buffer_sets: replace the buffer's contents with a NUL-terminated string */
+void hoedown_buffer_sets(hoedown_buffer *buf, const char *str);
+
+/* hoedown_buffer_eq: compare a buffer's data with other data for equality */
+int hoedown_buffer_eq(const hoedown_buffer *buf, const uint8_t *data, size_t size);
+
+/* hoedown_buffer_eq: compare a buffer's data with NUL-terminated string for equality */
+int hoedown_buffer_eqs(const hoedown_buffer *buf, const char *str);
+
+/* hoedown_buffer_prefix: compare the beginning of a buffer with a string */
+int hoedown_buffer_prefix(const hoedown_buffer *buf, const char *prefix);
+
+/* hoedown_buffer_slurp: remove a given number of bytes from the head of the buffer */
+void hoedown_buffer_slurp(hoedown_buffer *buf, size_t size);
+
+/* hoedown_buffer_cstr: NUL-termination of the string array (making a C-string) */
+const char *hoedown_buffer_cstr(hoedown_buffer *buf);
+
+/* hoedown_buffer_printf: formatted printing to a buffer */
+void hoedown_buffer_printf(hoedown_buffer *buf, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
+
+/* hoedown_buffer_put_utf8: put a Unicode character encoded as UTF-8 */
+void hoedown_buffer_put_utf8(hoedown_buffer *buf, unsigned int codepoint);
+
+/* hoedown_buffer_free: free the buffer */
+void hoedown_buffer_free(hoedown_buffer *buf);
+
+
+/* HOEDOWN_BUFPUTSL: optimized hoedown_buffer_puts of a string literal */
+#define HOEDOWN_BUFPUTSL(output, literal) \
+	hoedown_buffer_put(output, (const uint8_t *)literal, sizeof(literal) - 1)
+
+/* HOEDOWN_BUFSETSL: optimized hoedown_buffer_sets of a string literal */
+#define HOEDOWN_BUFSETSL(output, literal) \
+	hoedown_buffer_set(output, (const uint8_t *)literal, sizeof(literal) - 1)
+
+/* HOEDOWN_BUFEQSL: optimized hoedown_buffer_eqs of a string literal */
+#define HOEDOWN_BUFEQSL(output, literal) \
+	hoedown_buffer_eq(output, (const uint8_t *)literal, sizeof(literal) - 1)
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_BUFFER_H **/
diff --git a/depends/hoedown/hoedown/document.h b/depends/hoedown/hoedown/document.h
new file mode 100644
index 00000000..a8178fec
--- /dev/null
+++ b/depends/hoedown/hoedown/document.h
@@ -0,0 +1,172 @@
+/* document.h - generic markdown parser */
+
+#ifndef HOEDOWN_DOCUMENT_H
+#define HOEDOWN_DOCUMENT_H
+
+#include "buffer.h"
+#include "autolink.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*************
+ * CONSTANTS *
+ *************/
+
+typedef enum hoedown_extensions {
+	/* block-level extensions */
+	HOEDOWN_EXT_TABLES = (1 << 0),
+	HOEDOWN_EXT_FENCED_CODE = (1 << 1),
+	HOEDOWN_EXT_FOOTNOTES = (1 << 2),
+
+	/* span-level extensions */
+	HOEDOWN_EXT_AUTOLINK = (1 << 3),
+	HOEDOWN_EXT_STRIKETHROUGH = (1 << 4),
+	HOEDOWN_EXT_UNDERLINE = (1 << 5),
+	HOEDOWN_EXT_HIGHLIGHT = (1 << 6),
+	HOEDOWN_EXT_QUOTE = (1 << 7),
+	HOEDOWN_EXT_SUPERSCRIPT = (1 << 8),
+	HOEDOWN_EXT_MATH = (1 << 9),
+
+	/* other flags */
+	HOEDOWN_EXT_NO_INTRA_EMPHASIS = (1 << 11),
+	HOEDOWN_EXT_SPACE_HEADERS = (1 << 12),
+	HOEDOWN_EXT_MATH_EXPLICIT = (1 << 13),
+
+	/* negative flags */
+	HOEDOWN_EXT_DISABLE_INDENTED_CODE = (1 << 14)
+} hoedown_extensions;
+
+#define HOEDOWN_EXT_BLOCK (\
+	HOEDOWN_EXT_TABLES |\
+	HOEDOWN_EXT_FENCED_CODE |\
+	HOEDOWN_EXT_FOOTNOTES )
+
+#define HOEDOWN_EXT_SPAN (\
+	HOEDOWN_EXT_AUTOLINK |\
+	HOEDOWN_EXT_STRIKETHROUGH |\
+	HOEDOWN_EXT_UNDERLINE |\
+	HOEDOWN_EXT_HIGHLIGHT |\
+	HOEDOWN_EXT_QUOTE |\
+	HOEDOWN_EXT_SUPERSCRIPT |\
+	HOEDOWN_EXT_MATH )
+
+#define HOEDOWN_EXT_FLAGS (\
+	HOEDOWN_EXT_NO_INTRA_EMPHASIS |\
+	HOEDOWN_EXT_SPACE_HEADERS |\
+	HOEDOWN_EXT_MATH_EXPLICIT )
+
+#define HOEDOWN_EXT_NEGATIVE (\
+	HOEDOWN_EXT_DISABLE_INDENTED_CODE )
+
+typedef enum hoedown_list_flags {
+	HOEDOWN_LIST_ORDERED = (1 << 0),
+	HOEDOWN_LI_BLOCK = (1 << 1)	/* <li> containing block data */
+} hoedown_list_flags;
+
+typedef enum hoedown_table_flags {
+	HOEDOWN_TABLE_ALIGN_LEFT = 1,
+	HOEDOWN_TABLE_ALIGN_RIGHT = 2,
+	HOEDOWN_TABLE_ALIGN_CENTER = 3,
+	HOEDOWN_TABLE_ALIGNMASK = 3,
+	HOEDOWN_TABLE_HEADER = 4
+} hoedown_table_flags;
+
+typedef enum hoedown_autolink_type {
+	HOEDOWN_AUTOLINK_NONE,		/* used internally when it is not an autolink*/
+	HOEDOWN_AUTOLINK_NORMAL,	/* normal http/http/ftp/mailto/etc link */
+	HOEDOWN_AUTOLINK_EMAIL		/* e-mail link without explit mailto: */
+} hoedown_autolink_type;
+
+
+/*********
+ * TYPES *
+ *********/
+
+struct hoedown_document;
+typedef struct hoedown_document hoedown_document;
+
+struct hoedown_renderer_data {
+	void *opaque;
+};
+typedef struct hoedown_renderer_data hoedown_renderer_data;
+
+/* hoedown_renderer - functions for rendering parsed data */
+struct hoedown_renderer {
+	/* state object */
+	void *opaque;
+
+	/* block level callbacks - NULL skips the block */
+	void (*blockcode)(hoedown_buffer *ob, const hoedown_buffer *text, const hoedown_buffer *lang, const hoedown_renderer_data *data);
+	void (*blockquote)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*header)(hoedown_buffer *ob, const hoedown_buffer *content, int level, const hoedown_renderer_data *data);
+	void (*hrule)(hoedown_buffer *ob, const hoedown_renderer_data *data);
+	void (*list)(hoedown_buffer *ob, const hoedown_buffer *content, hoedown_list_flags flags, const hoedown_renderer_data *data);
+	void (*listitem)(hoedown_buffer *ob, const hoedown_buffer *content, hoedown_list_flags flags, const hoedown_renderer_data *data);
+	void (*paragraph)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*table)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*table_header)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*table_body)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*table_row)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*table_cell)(hoedown_buffer *ob, const hoedown_buffer *content, hoedown_table_flags flags, const hoedown_renderer_data *data);
+	void (*footnotes)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	void (*footnote_def)(hoedown_buffer *ob, const hoedown_buffer *content, unsigned int num, const hoedown_renderer_data *data);
+	void (*blockhtml)(hoedown_buffer *ob, const hoedown_buffer *text, const hoedown_renderer_data *data);
+
+	/* span level callbacks - NULL or return 0 prints the span verbatim */
+	int (*autolink)(hoedown_buffer *ob, const hoedown_buffer *link, hoedown_autolink_type type, const hoedown_renderer_data *data);
+	int (*codespan)(hoedown_buffer *ob, const hoedown_buffer *text, const hoedown_renderer_data *data);
+	int (*double_emphasis)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*emphasis)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*underline)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*highlight)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*quote)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*image)(hoedown_buffer *ob, const hoedown_buffer *link, const hoedown_buffer *title, const hoedown_buffer *alt, const hoedown_renderer_data *data);
+	int (*linebreak)(hoedown_buffer *ob, const hoedown_renderer_data *data);
+	int (*link)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_buffer *link, const hoedown_buffer *title, const hoedown_renderer_data *data);
+	int (*triple_emphasis)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*strikethrough)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*superscript)(hoedown_buffer *ob, const hoedown_buffer *content, const hoedown_renderer_data *data);
+	int (*footnote_ref)(hoedown_buffer *ob, unsigned int num, const hoedown_renderer_data *data);
+	int (*math)(hoedown_buffer *ob, const hoedown_buffer *text, int displaymode, const hoedown_renderer_data *data);
+	int (*raw_html)(hoedown_buffer *ob, const hoedown_buffer *text, const hoedown_renderer_data *data);
+
+	/* low level callbacks - NULL copies input directly into the output */
+	void (*entity)(hoedown_buffer *ob, const hoedown_buffer *text, const hoedown_renderer_data *data);
+	void (*normal_text)(hoedown_buffer *ob, const hoedown_buffer *text, const hoedown_renderer_data *data);
+
+	/* miscellaneous callbacks */
+	void (*doc_header)(hoedown_buffer *ob, int inline_render, const hoedown_renderer_data *data);
+	void (*doc_footer)(hoedown_buffer *ob, int inline_render, const hoedown_renderer_data *data);
+};
+typedef struct hoedown_renderer hoedown_renderer;
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* hoedown_document_new: allocate a new document processor instance */
+hoedown_document *hoedown_document_new(
+	const hoedown_renderer *renderer,
+	hoedown_extensions extensions,
+	size_t max_nesting
+) __attribute__ ((malloc));
+
+/* hoedown_document_render: render regular Markdown using the document processor */
+void hoedown_document_render(hoedown_document *doc, hoedown_buffer *ob, const uint8_t *data, size_t size);
+
+/* hoedown_document_render_inline: render inline Markdown using the document processor */
+void hoedown_document_render_inline(hoedown_document *doc, hoedown_buffer *ob, const uint8_t *data, size_t size);
+
+/* hoedown_document_free: deallocate a document processor instance */
+void hoedown_document_free(hoedown_document *doc);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_DOCUMENT_H **/
diff --git a/depends/hoedown/hoedown/escape.h b/depends/hoedown/hoedown/escape.h
new file mode 100644
index 00000000..d7659c27
--- /dev/null
+++ b/depends/hoedown/hoedown/escape.h
@@ -0,0 +1,28 @@
+/* escape.h - escape utilities */
+
+#ifndef HOEDOWN_ESCAPE_H
+#define HOEDOWN_ESCAPE_H
+
+#include "buffer.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* hoedown_escape_href: escape (part of) a URL inside HTML */
+void hoedown_escape_href(hoedown_buffer *ob, const uint8_t *data, size_t size);
+
+/* hoedown_escape_html: escape HTML */
+void hoedown_escape_html(hoedown_buffer *ob, const uint8_t *data, size_t size, int secure);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_ESCAPE_H **/
diff --git a/depends/hoedown/hoedown/html.h b/depends/hoedown/hoedown/html.h
new file mode 100644
index 00000000..e46e7fd6
--- /dev/null
+++ b/depends/hoedown/hoedown/html.h
@@ -0,0 +1,84 @@
+/* html.h - HTML renderer and utilities */
+
+#ifndef HOEDOWN_HTML_H
+#define HOEDOWN_HTML_H
+
+#include "document.h"
+#include "buffer.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*************
+ * CONSTANTS *
+ *************/
+
+typedef enum hoedown_html_flags {
+	HOEDOWN_HTML_SKIP_HTML = (1 << 0),
+	HOEDOWN_HTML_ESCAPE = (1 << 1),
+	HOEDOWN_HTML_HARD_WRAP = (1 << 2),
+	HOEDOWN_HTML_USE_XHTML = (1 << 3)
+} hoedown_html_flags;
+
+typedef enum hoedown_html_tag {
+	HOEDOWN_HTML_TAG_NONE = 0,
+	HOEDOWN_HTML_TAG_OPEN,
+	HOEDOWN_HTML_TAG_CLOSE
+} hoedown_html_tag;
+
+
+/*********
+ * TYPES *
+ *********/
+
+struct hoedown_html_renderer_state {
+	void *opaque;
+
+	struct {
+		int header_count;
+		int current_level;
+		int level_offset;
+		int nesting_level;
+	} toc_data;
+
+	hoedown_html_flags flags;
+
+	/* extra callbacks */
+	void (*link_attributes)(hoedown_buffer *ob, const hoedown_buffer *url, const hoedown_renderer_data *data);
+};
+typedef struct hoedown_html_renderer_state hoedown_html_renderer_state;
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* hoedown_html_smartypants: process an HTML snippet using SmartyPants for smart punctuation */
+void hoedown_html_smartypants(hoedown_buffer *ob, const uint8_t *data, size_t size);
+
+/* hoedown_html_is_tag: checks if data starts with a specific tag, returns the tag type or NONE */
+hoedown_html_tag hoedown_html_is_tag(const uint8_t *data, size_t size, const char *tagname);
+
+
+/* hoedown_html_renderer_new: allocates a regular HTML renderer */
+hoedown_renderer *hoedown_html_renderer_new(
+	hoedown_html_flags render_flags,
+	int nesting_level
+) __attribute__ ((malloc));
+
+/* hoedown_html_toc_renderer_new: like hoedown_html_renderer_new, but the returned renderer produces the Table of Contents */
+hoedown_renderer *hoedown_html_toc_renderer_new(
+	int nesting_level
+) __attribute__ ((malloc));
+
+/* hoedown_html_renderer_free: deallocate an HTML renderer */
+void hoedown_html_renderer_free(hoedown_renderer *renderer);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_HTML_H **/
diff --git a/depends/hoedown/hoedown/stack.h b/depends/hoedown/hoedown/stack.h
new file mode 100644
index 00000000..bf9b439b
--- /dev/null
+++ b/depends/hoedown/hoedown/stack.h
@@ -0,0 +1,52 @@
+/* stack.h - simple stacking */
+
+#ifndef HOEDOWN_STACK_H
+#define HOEDOWN_STACK_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*********
+ * TYPES *
+ *********/
+
+struct hoedown_stack {
+	void **item;
+	size_t size;
+	size_t asize;
+};
+typedef struct hoedown_stack hoedown_stack;
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* hoedown_stack_init: initialize a stack */
+void hoedown_stack_init(hoedown_stack *st, size_t initial_size);
+
+/* hoedown_stack_uninit: free internal data of the stack */
+void hoedown_stack_uninit(hoedown_stack *st);
+
+/* hoedown_stack_grow: increase the allocated size to the given value */
+void hoedown_stack_grow(hoedown_stack *st, size_t neosz);
+
+/* hoedown_stack_push: push an item to the top of the stack */
+void hoedown_stack_push(hoedown_stack *st, void *item);
+
+/* hoedown_stack_pop: retrieve and remove the item at the top of the stack */
+void *hoedown_stack_pop(hoedown_stack *st);
+
+/* hoedown_stack_top: retrieve the item at the top of the stack */
+void *hoedown_stack_top(const hoedown_stack *st);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_STACK_H **/
diff --git a/depends/hoedown/hoedown/version.h b/depends/hoedown/hoedown/version.h
new file mode 100644
index 00000000..4938cae5
--- /dev/null
+++ b/depends/hoedown/hoedown/version.h
@@ -0,0 +1,33 @@
+/* version.h - holds Hoedown's version */
+
+#ifndef HOEDOWN_VERSION_H
+#define HOEDOWN_VERSION_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*************
+ * CONSTANTS *
+ *************/
+
+#define HOEDOWN_VERSION "3.0.2"
+#define HOEDOWN_VERSION_MAJOR 3
+#define HOEDOWN_VERSION_MINOR 0
+#define HOEDOWN_VERSION_REVISION 2
+
+
+/*************
+ * FUNCTIONS *
+ *************/
+
+/* hoedown_version: retrieve Hoedown's version numbers */
+void hoedown_version(int *major, int *minor, int *revision);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /** HOEDOWN_VERSION_H **/
diff --git a/depends/hoedown/src/autolink.c b/depends/hoedown/src/autolink.c
new file mode 100644
index 00000000..9bc7fad5
--- /dev/null
+++ b/depends/hoedown/src/autolink.c
@@ -0,0 +1,281 @@
+#include "hoedown/autolink.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#ifndef _MSC_VER
+#include <strings.h>
+#else
+#define strncasecmp	_strnicmp
+#endif
+
+int
+hoedown_autolink_is_safe(const uint8_t *data, size_t size)
+{
+	static const size_t valid_uris_count = 6;
+	static const char *valid_uris[] = {
+		"http://", "https://", "/", "#", "ftp://", "mailto:"
+	};
+	static const size_t valid_uris_size[] = { 7, 8, 1, 1, 6, 7 };
+	size_t i;
+
+	for (i = 0; i < valid_uris_count; ++i) {
+		size_t len = valid_uris_size[i];
+
+		if (size > len &&
+			strncasecmp((char *)data, valid_uris[i], len) == 0 &&
+			isalnum(data[len]))
+			return 1;
+	}
+
+	return 0;
+}
+
+static size_t
+autolink_delim(uint8_t *data, size_t link_end, size_t max_rewind, size_t size)
+{
+	uint8_t cclose, copen = 0;
+	size_t i;
+
+	for (i = 0; i < link_end; ++i)
+		if (data[i] == '<') {
+			link_end = i;
+			break;
+		}
+
+	while (link_end > 0) {
+		if (strchr("?!.,:", data[link_end - 1]) != NULL)
+			link_end--;
+
+		else if (data[link_end - 1] == ';') {
+			size_t new_end = link_end - 2;
+
+			while (new_end > 0 && isalpha(data[new_end]))
+				new_end--;
+
+			if (new_end < link_end - 2 && data[new_end] == '&')
+				link_end = new_end;
+			else
+				link_end--;
+		}
+		else break;
+	}
+
+	if (link_end == 0)
+		return 0;
+
+	cclose = data[link_end - 1];
+
+	switch (cclose) {
+	case '"':	copen = '"'; break;
+	case '\'':	copen = '\''; break;
+	case ')':	copen = '('; break;
+	case ']':	copen = '['; break;
+	case '}':	copen = '{'; break;
+	}
+
+	if (copen != 0) {
+		size_t closing = 0;
+		size_t opening = 0;
+		size_t i = 0;
+
+		/* Try to close the final punctuation sign in this same line;
+		 * if we managed to close it outside of the URL, that means that it's
+		 * not part of the URL. If it closes inside the URL, that means it
+		 * is part of the URL.
+		 *
+		 * Examples:
+		 *
+		 *	foo http://www.pokemon.com/Pikachu_(Electric) bar
+		 *		=> http://www.pokemon.com/Pikachu_(Electric)
+		 *
+		 *	foo (http://www.pokemon.com/Pikachu_(Electric)) bar
+		 *		=> http://www.pokemon.com/Pikachu_(Electric)
+		 *
+		 *	foo http://www.pokemon.com/Pikachu_(Electric)) bar
+		 *		=> http://www.pokemon.com/Pikachu_(Electric))
+		 *
+		 *	(foo http://www.pokemon.com/Pikachu_(Electric)) bar
+		 *		=> foo http://www.pokemon.com/Pikachu_(Electric)
+		 */
+
+		while (i < link_end) {
+			if (data[i] == copen)
+				opening++;
+			else if (data[i] == cclose)
+				closing++;
+
+			i++;
+		}
+
+		if (closing != opening)
+			link_end--;
+	}
+
+	return link_end;
+}
+
+static size_t
+check_domain(uint8_t *data, size_t size, int allow_short)
+{
+	size_t i, np = 0;
+
+	if (!isalnum(data[0]))
+		return 0;
+
+	for (i = 1; i < size - 1; ++i) {
+		if (strchr(".:", data[i]) != NULL) np++;
+		else if (!isalnum(data[i]) && data[i] != '-') break;
+	}
+
+	if (allow_short) {
+		/* We don't need a valid domain in the strict sense (with
+		 * least one dot; so just make sure it's composed of valid
+		 * domain characters and return the length of the the valid
+		 * sequence. */
+		return i;
+	} else {
+		/* a valid domain needs to have at least a dot.
+		 * that's as far as we get */
+		return np ? i : 0;
+	}
+}
+
+size_t
+hoedown_autolink__www(
+	size_t *rewind_p,
+	hoedown_buffer *link,
+	uint8_t *data,
+	size_t max_rewind,
+	size_t size,
+	unsigned int flags)
+{
+	size_t link_end;
+
+	if (max_rewind > 0 && !ispunct(data[-1]) && !isspace(data[-1]))
+		return 0;
+
+	if (size < 4 || memcmp(data, "www.", strlen("www.")) != 0)
+		return 0;
+
+	link_end = check_domain(data, size, 0);
+
+	if (link_end == 0)
+		return 0;
+
+	while (link_end < size && !isspace(data[link_end]))
+		link_end++;
+
+	link_end = autolink_delim(data, link_end, max_rewind, size);
+
+	if (link_end == 0)
+		return 0;
+
+	hoedown_buffer_put(link, data, link_end);
+	*rewind_p = 0;
+
+	return (int)link_end;
+}
+
+size_t
+hoedown_autolink__email(
+	size_t *rewind_p,
+	hoedown_buffer *link,
+	uint8_t *data,
+	size_t max_rewind,
+	size_t size,
+	unsigned int flags)
+{
+	size_t link_end, rewind;
+	int nb = 0, np = 0;
+
+	for (rewind = 0; rewind < max_rewind; ++rewind) {
+		uint8_t c = data[-1 - rewind];
+
+		if (isalnum(c))
+			continue;
+
+		if (strchr(".+-_", c) != NULL)
+			continue;
+
+		break;
+	}
+
+	if (rewind == 0)
+		return 0;
+
+	for (link_end = 0; link_end < size; ++link_end) {
+		uint8_t c = data[link_end];
+
+		if (isalnum(c))
+			continue;
+
+		if (c == '@')
+			nb++;
+		else if (c == '.' && link_end < size - 1)
+			np++;
+		else if (c != '-' && c != '_')
+			break;
+	}
+
+	if (link_end < 2 || nb != 1 || np == 0 ||
+		!isalpha(data[link_end - 1]))
+		return 0;
+
+	link_end = autolink_delim(data, link_end, max_rewind, size);
+
+	if (link_end == 0)
+		return 0;
+
+	hoedown_buffer_put(link, data - rewind, link_end + rewind);
+	*rewind_p = rewind;
+
+	return link_end;
+}
+
+size_t
+hoedown_autolink__url(
+	size_t *rewind_p,
+	hoedown_buffer *link,
+	uint8_t *data,
+	size_t max_rewind,
+	size_t size,
+	unsigned int flags)
+{
+	size_t link_end, rewind = 0, domain_len;
+
+	if (size < 4 || data[1] != '/' || data[2] != '/')
+		return 0;
+
+	while (rewind < max_rewind && isalpha(data[-1 - rewind]))
+		rewind++;
+
+	if (!hoedown_autolink_is_safe(data - rewind, size + rewind))
+		return 0;
+
+	link_end = strlen("://");
+
+	domain_len = check_domain(
+		data + link_end,
+		size - link_end,
+		flags & HOEDOWN_AUTOLINK_SHORT_DOMAINS);
+
+	if (domain_len == 0)
+		return 0;
+
+	link_end += domain_len;
+	while (link_end < size && !isspace(data[link_end]))
+		link_end++;
+
+	link_end = autolink_delim(data, link_end, max_rewind, size);
+
+	if (link_end == 0)
+		return 0;
+
+	hoedown_buffer_put(link, data - rewind, link_end + rewind);
+	*rewind_p = rewind;
+
+	return link_end;
+}
diff --git a/depends/hoedown/src/buffer.c b/depends/hoedown/src/buffer.c
new file mode 100644
index 00000000..12969c5f
--- /dev/null
+++ b/depends/hoedown/src/buffer.c
@@ -0,0 +1,308 @@
+#include "hoedown/buffer.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+void *
+hoedown_malloc(size_t size)
+{
+	void *ret = malloc(size);
+
+	if (!ret) {
+		fprintf(stderr, "Allocation failed.\n");
+		abort();
+	}
+
+	return ret;
+}
+
+void *
+hoedown_calloc(size_t nmemb, size_t size)
+{
+	void *ret = calloc(nmemb, size);
+
+	if (!ret) {
+		fprintf(stderr, "Allocation failed.\n");
+		abort();
+	}
+
+	return ret;
+}
+
+void *
+hoedown_realloc(void *ptr, size_t size)
+{
+	void *ret = realloc(ptr, size);
+
+	if (!ret) {
+		fprintf(stderr, "Allocation failed.\n");
+		abort();
+	}
+
+	return ret;
+}
+
+void
+hoedown_buffer_init(
+	hoedown_buffer *buf,
+	size_t unit,
+	hoedown_realloc_callback data_realloc,
+	hoedown_free_callback data_free,
+	hoedown_free_callback buffer_free)
+{
+	assert(buf);
+
+	buf->data = NULL;
+	buf->size = buf->asize = 0;
+	buf->unit = unit;
+	buf->data_realloc = data_realloc;
+	buf->data_free = data_free;
+	buf->buffer_free = buffer_free;
+}
+
+void
+hoedown_buffer_uninit(hoedown_buffer *buf)
+{
+	assert(buf && buf->unit);
+	buf->data_free(buf->data);
+}
+
+hoedown_buffer *
+hoedown_buffer_new(size_t unit)
+{
+	hoedown_buffer *ret = hoedown_malloc(sizeof (hoedown_buffer));
+	hoedown_buffer_init(ret, unit, hoedown_realloc, free, free);
+	return ret;
+}
+
+void
+hoedown_buffer_free(hoedown_buffer *buf)
+{
+	if (!buf) return;
+	assert(buf && buf->unit);
+
+	buf->data_free(buf->data);
+
+	if (buf->buffer_free)
+		buf->buffer_free(buf);
+}
+
+void
+hoedown_buffer_reset(hoedown_buffer *buf)
+{
+	assert(buf && buf->unit);
+
+	buf->data_free(buf->data);
+	buf->data = NULL;
+	buf->size = buf->asize = 0;
+}
+
+void
+hoedown_buffer_grow(hoedown_buffer *buf, size_t neosz)
+{
+	size_t neoasz;
+	assert(buf && buf->unit);
+
+	if (buf->asize >= neosz)
+		return;
+
+	neoasz = buf->asize + buf->unit;
+	while (neoasz < neosz)
+		neoasz += buf->unit;
+
+	buf->data = buf->data_realloc(buf->data, neoasz);
+	buf->asize = neoasz;
+}
+
+void
+hoedown_buffer_put(hoedown_buffer *buf, const uint8_t *data, size_t size)
+{
+	assert(buf && buf->unit);
+
+	if (buf->size + size > buf->asize)
+		hoedown_buffer_grow(buf, buf->size + size);
+
+	memcpy(buf->data + buf->size, data, size);
+	buf->size += size;
+}
+
+void
+hoedown_buffer_puts(hoedown_buffer *buf, const char *str)
+{
+	hoedown_buffer_put(buf, (const uint8_t *)str, strlen(str));
+}
+
+void
+hoedown_buffer_putc(hoedown_buffer *buf, uint8_t c)
+{
+	assert(buf && buf->unit);
+
+	if (buf->size >= buf->asize)
+		hoedown_buffer_grow(buf, buf->size + 1);
+
+	buf->data[buf->size] = c;
+	buf->size += 1;
+}
+
+int
+hoedown_buffer_putf(hoedown_buffer *buf, FILE *file)
+{
+	assert(buf && buf->unit);
+
+	while (!(feof(file) || ferror(file))) {
+		hoedown_buffer_grow(buf, buf->size + buf->unit);
+		buf->size += fread(buf->data + buf->size, 1, buf->unit, file);
+	}
+
+	return ferror(file);
+}
+
+void
+hoedown_buffer_set(hoedown_buffer *buf, const uint8_t *data, size_t size)
+{
+	assert(buf && buf->unit);
+
+	if (size > buf->asize)
+		hoedown_buffer_grow(buf, size);
+
+	memcpy(buf->data, data, size);
+	buf->size = size;
+}
+
+void
+hoedown_buffer_sets(hoedown_buffer *buf, const char *str)
+{
+	hoedown_buffer_set(buf, (const uint8_t *)str, strlen(str));
+}
+
+int
+hoedown_buffer_eq(const hoedown_buffer *buf, const uint8_t *data, size_t size)
+{
+	if (buf->size != size) return 0;
+	return memcmp(buf->data, data, size) == 0;
+}
+
+int
+hoedown_buffer_eqs(const hoedown_buffer *buf, const char *str)
+{
+	return hoedown_buffer_eq(buf, (const uint8_t *)str, strlen(str));
+}
+
+int
+hoedown_buffer_prefix(const hoedown_buffer *buf, const char *prefix)
+{
+	size_t i;
+
+	for (i = 0; i < buf->size; ++i) {
+		if (prefix[i] == 0)
+			return 0;
+
+		if (buf->data[i] != prefix[i])
+			return buf->data[i] - prefix[i];
+	}
+
+	return 0;
+}
+
+void
+hoedown_buffer_slurp(hoedown_buffer *buf, size_t size)
+{
+	assert(buf && buf->unit);
+
+	if (size >= buf->size) {
+		buf->size = 0;
+		return;
+	}
+
+	buf->size -= size;
+	memmove(buf->data, buf->data + size, buf->size);
+}
+
+const char *
+hoedown_buffer_cstr(hoedown_buffer *buf)
+{
+	assert(buf && buf->unit);
+
+	if (buf->size < buf->asize && buf->data[buf->size] == 0)
+		return (char *)buf->data;
+
+	hoedown_buffer_grow(buf, buf->size + 1);
+	buf->data[buf->size] = 0;
+
+	return (char *)buf->data;
+}
+
+void
+hoedown_buffer_printf(hoedown_buffer *buf, const char *fmt, ...)
+{
+	va_list ap;
+	int n;
+
+	assert(buf && buf->unit);
+
+	if (buf->size >= buf->asize)
+		hoedown_buffer_grow(buf, buf->size + 1);
+
+	va_start(ap, fmt);
+	n = vsnprintf((char *)buf->data + buf->size, buf->asize - buf->size, fmt, ap);
+	va_end(ap);
+
+	if (n < 0) {
+#ifndef _MSC_VER
+		return;
+#else
+		va_start(ap, fmt);
+		n = _vscprintf(fmt, ap);
+		va_end(ap);
+#endif
+	}
+
+	if ((size_t)n >= buf->asize - buf->size) {
+		hoedown_buffer_grow(buf, buf->size + n + 1);
+
+		va_start(ap, fmt);
+		n = vsnprintf((char *)buf->data + buf->size, buf->asize - buf->size, fmt, ap);
+		va_end(ap);
+	}
+
+	if (n < 0)
+		return;
+
+	buf->size += n;
+}
+
+void hoedown_buffer_put_utf8(hoedown_buffer *buf, unsigned int c) {
+	unsigned char unichar[4];
+
+	assert(buf && buf->unit);
+
+	if (c < 0x80) {
+		hoedown_buffer_putc(buf, c);
+	}
+	else if (c < 0x800) {
+		unichar[0] = 192 + (c / 64);
+		unichar[1] = 128 + (c % 64);
+		hoedown_buffer_put(buf, unichar, 2);
+	}
+	else if (c - 0xd800u < 0x800) {
+		HOEDOWN_BUFPUTSL(buf, "\xef\xbf\xbd");
+	}
+	else if (c < 0x10000) {
+		unichar[0] = 224 + (c / 4096);
+		unichar[1] = 128 + (c / 64) % 64;
+		unichar[2] = 128 + (c % 64);
+		hoedown_buffer_put(buf, unichar, 3);
+	}
+	else if (c < 0x110000) {
+		unichar[0] = 240 + (c / 262144);
+		unichar[1] = 128 + (c / 4096) % 64;
+		unichar[2] = 128 + (c / 64) % 64;
+		unichar[3] = 128 + (c % 64);
+		hoedown_buffer_put(buf, unichar, 4);
+	}
+	else {
+		HOEDOWN_BUFPUTSL(buf, "\xef\xbf\xbd");
+	}
+}
diff --git a/depends/hoedown/src/document.c b/depends/hoedown/src/document.c
new file mode 100644
index 00000000..8ba82e47
--- /dev/null
+++ b/depends/hoedown/src/document.c
@@ -0,0 +1,2958 @@
+#include "hoedown/document.h"
+
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+
+#include "hoedown/stack.h"
+
+#ifndef _MSC_VER
+#include <strings.h>
+#else
+#define strncasecmp	_strnicmp
+#endif
+
+#define REF_TABLE_SIZE 8
+
+#define BUFFER_BLOCK 0
+#define BUFFER_SPAN 1
+
+#define HOEDOWN_LI_END 8	/* internal list flag */
+
+const char *hoedown_find_block_tag(const char *str, unsigned int len);
+
+/***************
+ * LOCAL TYPES *
+ ***************/
+
+/* link_ref: reference to a link */
+struct link_ref {
+	unsigned int id;
+
+	hoedown_buffer *link;
+	hoedown_buffer *title;
+
+	struct link_ref *next;
+};
+
+/* footnote_ref: reference to a footnote */
+struct footnote_ref {
+	unsigned int id;
+
+	int is_used;
+	unsigned int num;
+
+	hoedown_buffer *contents;
+};
+
+/* footnote_item: an item in a footnote_list */
+struct footnote_item {
+	struct footnote_ref *ref;
+	struct footnote_item *next;
+};
+
+/* footnote_list: linked list of footnote_item */
+struct footnote_list {
+	unsigned int count;
+	struct footnote_item *head;
+	struct footnote_item *tail;
+};
+
+/* char_trigger: function pointer to render active chars */
+/*   returns the number of chars taken care of */
+/*   data is the pointer of the beginning of the span */
+/*   offset is the number of valid chars before data */
+typedef size_t
+(*char_trigger)(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+
+static size_t char_emphasis(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_quote(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_linebreak(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_codespan(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_escape(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_entity(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_langle_tag(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_autolink_url(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_autolink_email(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_autolink_www(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_link(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_superscript(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+static size_t char_math(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size);
+
+enum markdown_char_t {
+	MD_CHAR_NONE = 0,
+	MD_CHAR_EMPHASIS,
+	MD_CHAR_CODESPAN,
+	MD_CHAR_LINEBREAK,
+	MD_CHAR_LINK,
+	MD_CHAR_LANGLE,
+	MD_CHAR_ESCAPE,
+	MD_CHAR_ENTITY,
+	MD_CHAR_AUTOLINK_URL,
+	MD_CHAR_AUTOLINK_EMAIL,
+	MD_CHAR_AUTOLINK_WWW,
+	MD_CHAR_SUPERSCRIPT,
+	MD_CHAR_QUOTE,
+	MD_CHAR_MATH
+};
+
+static char_trigger markdown_char_ptrs[] = {
+	NULL,
+	&char_emphasis,
+	&char_codespan,
+	&char_linebreak,
+	&char_link,
+	&char_langle_tag,
+	&char_escape,
+	&char_entity,
+	&char_autolink_url,
+	&char_autolink_email,
+	&char_autolink_www,
+	&char_superscript,
+	&char_quote,
+	&char_math
+};
+
+struct hoedown_document {
+	hoedown_renderer md;
+	hoedown_renderer_data data;
+
+	struct link_ref *refs[REF_TABLE_SIZE];
+	struct footnote_list footnotes_found;
+	struct footnote_list footnotes_used;
+	uint8_t active_char[256];
+	hoedown_stack work_bufs[2];
+	hoedown_extensions ext_flags;
+	size_t max_nesting;
+	int in_link_body;
+};
+
+/***************************
+ * HELPER FUNCTIONS *
+ ***************************/
+
+static hoedown_buffer *
+newbuf(hoedown_document *doc, int type)
+{
+	static const size_t buf_size[2] = {256, 64};
+	hoedown_buffer *work = NULL;
+	hoedown_stack *pool = &doc->work_bufs[type];
+
+	if (pool->size < pool->asize &&
+		pool->item[pool->size] != NULL) {
+		work = pool->item[pool->size++];
+		work->size = 0;
+	} else {
+		work = hoedown_buffer_new(buf_size[type]);
+		hoedown_stack_push(pool, work);
+	}
+
+	return work;
+}
+
+static void
+popbuf(hoedown_document *doc, int type)
+{
+	doc->work_bufs[type].size--;
+}
+
+static void
+unscape_text(hoedown_buffer *ob, hoedown_buffer *src)
+{
+	size_t i = 0, org;
+	while (i < src->size) {
+		org = i;
+		while (i < src->size && src->data[i] != '\\')
+			i++;
+
+		if (i > org)
+			hoedown_buffer_put(ob, src->data + org, i - org);
+
+		if (i + 1 >= src->size)
+			break;
+
+		hoedown_buffer_putc(ob, src->data[i + 1]);
+		i += 2;
+	}
+}
+
+static unsigned int
+hash_link_ref(const uint8_t *link_ref, size_t length)
+{
+	size_t i;
+	unsigned int hash = 0;
+
+	for (i = 0; i < length; ++i)
+		hash = tolower(link_ref[i]) + (hash << 6) + (hash << 16) - hash;
+
+	return hash;
+}
+
+static struct link_ref *
+add_link_ref(
+	struct link_ref **references,
+	const uint8_t *name, size_t name_size)
+{
+	struct link_ref *ref = hoedown_calloc(1, sizeof(struct link_ref));
+
+	ref->id = hash_link_ref(name, name_size);
+	ref->next = references[ref->id % REF_TABLE_SIZE];
+
+	references[ref->id % REF_TABLE_SIZE] = ref;
+	return ref;
+}
+
+static struct link_ref *
+find_link_ref(struct link_ref **references, uint8_t *name, size_t length)
+{
+	unsigned int hash = hash_link_ref(name, length);
+	struct link_ref *ref = NULL;
+
+	ref = references[hash % REF_TABLE_SIZE];
+
+	while (ref != NULL) {
+		if (ref->id == hash)
+			return ref;
+
+		ref = ref->next;
+	}
+
+	return NULL;
+}
+
+static void
+free_link_refs(struct link_ref **references)
+{
+	size_t i;
+
+	for (i = 0; i < REF_TABLE_SIZE; ++i) {
+		struct link_ref *r = references[i];
+		struct link_ref *next;
+
+		while (r) {
+			next = r->next;
+			hoedown_buffer_free(r->link);
+			hoedown_buffer_free(r->title);
+			free(r);
+			r = next;
+		}
+	}
+}
+
+static struct footnote_ref *
+create_footnote_ref(struct footnote_list *list, const uint8_t *name, size_t name_size)
+{
+	struct footnote_ref *ref = hoedown_calloc(1, sizeof(struct footnote_ref));
+
+	ref->id = hash_link_ref(name, name_size);
+
+	return ref;
+}
+
+static int
+add_footnote_ref(struct footnote_list *list, struct footnote_ref *ref)
+{
+	struct footnote_item *item = hoedown_calloc(1, sizeof(struct footnote_item));
+	if (!item)
+		return 0;
+	item->ref = ref;
+
+	if (list->head == NULL) {
+		list->head = list->tail = item;
+	} else {
+		list->tail->next = item;
+		list->tail = item;
+	}
+	list->count++;
+
+	return 1;
+}
+
+static struct footnote_ref *
+find_footnote_ref(struct footnote_list *list, uint8_t *name, size_t length)
+{
+	unsigned int hash = hash_link_ref(name, length);
+	struct footnote_item *item = NULL;
+
+	item = list->head;
+
+	while (item != NULL) {
+		if (item->ref->id == hash)
+			return item->ref;
+		item = item->next;
+	}
+
+	return NULL;
+}
+
+static void
+free_footnote_ref(struct footnote_ref *ref)
+{
+	hoedown_buffer_free(ref->contents);
+	free(ref);
+}
+
+static void
+free_footnote_list(struct footnote_list *list, int free_refs)
+{
+	struct footnote_item *item = list->head;
+	struct footnote_item *next;
+
+	while (item) {
+		next = item->next;
+		if (free_refs)
+			free_footnote_ref(item->ref);
+		free(item);
+		item = next;
+	}
+}
+
+
+/*
+ * Check whether a char is a Markdown spacing char.
+
+ * Right now we only consider spaces the actual
+ * space and a newline: tabs and carriage returns
+ * are filtered out during the preprocessing phase.
+ *
+ * If we wanted to actually be UTF-8 compliant, we
+ * should instead extract an Unicode codepoint from
+ * this character and check for space properties.
+ */
+static int
+_isspace(int c)
+{
+	return c == ' ' || c == '\n';
+}
+
+/* is_empty_all: verify that all the data is spacing */
+static int
+is_empty_all(const uint8_t *data, size_t size)
+{
+	size_t i = 0;
+	while (i < size && _isspace(data[i])) i++;
+	return i == size;
+}
+
+/*
+ * Replace all spacing characters in data with spaces. As a special
+ * case, this collapses a newline with the previous space, if possible.
+ */
+static void
+replace_spacing(hoedown_buffer *ob, const uint8_t *data, size_t size)
+{
+	size_t i = 0, mark;
+	hoedown_buffer_grow(ob, size);
+	while (1) {
+		mark = i;
+		while (i < size && data[i] != '\n') i++;
+		hoedown_buffer_put(ob, data + mark, i - mark);
+
+		if (i >= size) break;
+
+		if (!(i > 0 && data[i-1] == ' '))
+			hoedown_buffer_putc(ob, ' ');
+		i++;
+	}
+}
+
+/****************************
+ * INLINE PARSING FUNCTIONS *
+ ****************************/
+
+/* is_mail_autolink • looks for the address part of a mail autolink and '>' */
+/* this is less strict than the original markdown e-mail address matching */
+static size_t
+is_mail_autolink(uint8_t *data, size_t size)
+{
+	size_t i = 0, nb = 0;
+
+	/* address is assumed to be: [-@._a-zA-Z0-9]+ with exactly one '@' */
+	for (i = 0; i < size; ++i) {
+		if (isalnum(data[i]))
+			continue;
+
+		switch (data[i]) {
+			case '@':
+				nb++;
+
+			case '-':
+			case '.':
+			case '_':
+				break;
+
+			case '>':
+				return (nb == 1) ? i + 1 : 0;
+
+			default:
+				return 0;
+		}
+	}
+
+	return 0;
+}
+
+/* tag_length • returns the length of the given tag, or 0 is it's not valid */
+static size_t
+tag_length(uint8_t *data, size_t size, hoedown_autolink_type *autolink)
+{
+	size_t i, j;
+
+	/* a valid tag can't be shorter than 3 chars */
+	if (size < 3) return 0;
+
+	/* begins with a '<' optionally followed by '/', followed by letter or number */
+	if (data[0] != '<') return 0;
+	i = (data[1] == '/') ? 2 : 1;
+
+	if (!isalnum(data[i]))
+		return 0;
+
+	/* scheme test */
+	*autolink = HOEDOWN_AUTOLINK_NONE;
+
+	/* try to find the beginning of an URI */
+	while (i < size && (isalnum(data[i]) || data[i] == '.' || data[i] == '+' || data[i] == '-'))
+		i++;
+
+	if (i > 1 && data[i] == '@') {
+		if ((j = is_mail_autolink(data + i, size - i)) != 0) {
+			*autolink = HOEDOWN_AUTOLINK_EMAIL;
+			return i + j;
+		}
+	}
+
+	if (i > 2 && data[i] == ':') {
+		*autolink = HOEDOWN_AUTOLINK_NORMAL;
+		i++;
+	}
+
+	/* completing autolink test: no spacing or ' or " */
+	if (i >= size)
+		*autolink = HOEDOWN_AUTOLINK_NONE;
+
+	else if (*autolink) {
+		j = i;
+
+		while (i < size) {
+			if (data[i] == '\\') i += 2;
+			else if (data[i] == '>' || data[i] == '\'' ||
+					data[i] == '"' || data[i] == ' ' || data[i] == '\n')
+					break;
+			else i++;
+		}
+
+		if (i >= size) return 0;
+		if (i > j && data[i] == '>') return i + 1;
+		/* one of the forbidden chars has been found */
+		*autolink = HOEDOWN_AUTOLINK_NONE;
+	}
+
+	/* looking for something looking like a tag end */
+	while (i < size && data[i] != '>') i++;
+	if (i >= size) return 0;
+	return i + 1;
+}
+
+/* parse_inline • parses inline markdown elements */
+static void
+parse_inline(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size)
+{
+	size_t i = 0, end = 0, consumed = 0;
+	hoedown_buffer work = { 0, 0, 0, 0, NULL, NULL, NULL };
+	uint8_t *active_char = doc->active_char;
+
+	if (doc->work_bufs[BUFFER_SPAN].size +
+		doc->work_bufs[BUFFER_BLOCK].size > doc->max_nesting)
+		return;
+
+	while (i < size) {
+		/* copying inactive chars into the output */
+		while (end < size && active_char[data[end]] == 0)
+			end++;
+
+		if (doc->md.normal_text) {
+			work.data = data + i;
+			work.size = end - i;
+			doc->md.normal_text(ob, &work, &doc->data);
+		}
+		else
+			hoedown_buffer_put(ob, data + i, end - i);
+
+		if (end >= size) break;
+		i = end;
+
+		end = markdown_char_ptrs[ (int)active_char[data[end]] ](ob, doc, data + i, i - consumed, size - i);
+		if (!end) /* no action from the callback */
+			end = i + 1;
+		else {
+			i += end;
+			end = i;
+			consumed = i;
+		}
+	}
+}
+
+/* is_escaped • returns whether special char at data[loc] is escaped by '\\' */
+static int
+is_escaped(uint8_t *data, size_t loc)
+{
+	size_t i = loc;
+	while (i >= 1 && data[i - 1] == '\\')
+		i--;
+
+	/* odd numbers of backslashes escapes data[loc] */
+	return (loc - i) % 2;
+}
+
+/* find_emph_char • looks for the next emph uint8_t, skipping other constructs */
+static size_t
+find_emph_char(uint8_t *data, size_t size, uint8_t c)
+{
+	size_t i = 0;
+
+	while (i < size) {
+		while (i < size && data[i] != c && data[i] != '[' && data[i] != '`')
+			i++;
+
+		if (i == size)
+			return 0;
+
+		/* not counting escaped chars */
+		if (is_escaped(data, i)) {
+			i++; continue;
+		}
+
+		if (data[i] == c)
+			return i;
+
+		/* skipping a codespan */
+		if (data[i] == '`') {
+			size_t span_nb = 0, bt;
+			size_t tmp_i = 0;
+
+			/* counting the number of opening backticks */
+			while (i < size && data[i] == '`') {
+				i++; span_nb++;
+			}
+
+			if (i >= size) return 0;
+
+			/* finding the matching closing sequence */
+			bt = 0;
+			while (i < size && bt < span_nb) {
+				if (!tmp_i && data[i] == c) tmp_i = i;
+				if (data[i] == '`') bt++;
+				else bt = 0;
+				i++;
+			}
+
+			/* not a well-formed codespan; use found matching emph char */
+			if (i >= size) return tmp_i;
+		}
+		/* skipping a link */
+		else if (data[i] == '[') {
+			size_t tmp_i = 0;
+			uint8_t cc;
+
+			i++;
+			while (i < size && data[i] != ']') {
+				if (!tmp_i && data[i] == c) tmp_i = i;
+				i++;
+			}
+
+			i++;
+			while (i < size && _isspace(data[i]))
+				i++;
+
+			if (i >= size)
+				return tmp_i;
+
+			switch (data[i]) {
+			case '[':
+				cc = ']'; break;
+
+			case '(':
+				cc = ')'; break;
+
+			default:
+				if (tmp_i)
+					return tmp_i;
+				else
+					continue;
+			}
+
+			i++;
+			while (i < size && data[i] != cc) {
+				if (!tmp_i && data[i] == c) tmp_i = i;
+				i++;
+			}
+
+			if (i >= size)
+				return tmp_i;
+
+			i++;
+		}
+	}
+
+	return 0;
+}
+
+/* parse_emph1 • parsing single emphase */
+/* closed by a symbol not preceded by spacing and not followed by symbol */
+static size_t
+parse_emph1(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, uint8_t c)
+{
+	size_t i = 0, len;
+	hoedown_buffer *work = 0;
+	int r;
+
+	/* skipping one symbol if coming from emph3 */
+	if (size > 1 && data[0] == c && data[1] == c) i = 1;
+
+	while (i < size) {
+		len = find_emph_char(data + i, size - i, c);
+		if (!len) return 0;
+		i += len;
+		if (i >= size) return 0;
+
+		if (data[i] == c && !_isspace(data[i - 1])) {
+
+			if (doc->ext_flags & HOEDOWN_EXT_NO_INTRA_EMPHASIS) {
+				if (i + 1 < size && isalnum(data[i + 1]))
+					continue;
+			}
+
+			work = newbuf(doc, BUFFER_SPAN);
+			parse_inline(work, doc, data, i);
+
+			if (doc->ext_flags & HOEDOWN_EXT_UNDERLINE && c == '_')
+				r = doc->md.underline(ob, work, &doc->data);
+			else
+				r = doc->md.emphasis(ob, work, &doc->data);
+
+			popbuf(doc, BUFFER_SPAN);
+			return r ? i + 1 : 0;
+		}
+	}
+
+	return 0;
+}
+
+/* parse_emph2 • parsing single emphase */
+static size_t
+parse_emph2(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, uint8_t c)
+{
+	size_t i = 0, len;
+	hoedown_buffer *work = 0;
+	int r;
+
+	while (i < size) {
+		len = find_emph_char(data + i, size - i, c);
+		if (!len) return 0;
+		i += len;
+
+		if (i + 1 < size && data[i] == c && data[i + 1] == c && i && !_isspace(data[i - 1])) {
+			work = newbuf(doc, BUFFER_SPAN);
+			parse_inline(work, doc, data, i);
+
+			if (c == '~')
+				r = doc->md.strikethrough(ob, work, &doc->data);
+			else if (c == '=')
+				r = doc->md.highlight(ob, work, &doc->data);
+			else
+				r = doc->md.double_emphasis(ob, work, &doc->data);
+
+			popbuf(doc, BUFFER_SPAN);
+			return r ? i + 2 : 0;
+		}
+		i++;
+	}
+	return 0;
+}
+
+/* parse_emph3 • parsing single emphase */
+/* finds the first closing tag, and delegates to the other emph */
+static size_t
+parse_emph3(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t size, uint8_t c)
+{
+	size_t i = 0, len;
+	int r;
+
+	while (i < size) {
+		len = find_emph_char(data + i, size - i, c);
+		if (!len) return 0;
+		i += len;
+
+		/* skip spacing preceded symbols */
+		if (data[i] != c || _isspace(data[i - 1]))
+			continue;
+
+		if (i + 2 < size && data[i + 1] == c && data[i + 2] == c && doc->md.triple_emphasis) {
+			/* triple symbol found */
+			hoedown_buffer *work = newbuf(doc, BUFFER_SPAN);
+
+			parse_inline(work, doc, data, i);
+			r = doc->md.triple_emphasis(ob, work, &doc->data);
+			popbuf(doc, BUFFER_SPAN);
+			return r ? i + 3 : 0;
+
+		} else if (i + 1 < size && data[i + 1] == c) {
+			/* double symbol found, handing over to emph1 */
+			len = parse_emph1(ob, doc, data - 2, size + 2, c);
+			if (!len) return 0;
+			else return len - 2;
+
+		} else {
+			/* single symbol found, handing over to emph2 */
+			len = parse_emph2(ob, doc, data - 1, size + 1, c);
+			if (!len) return 0;
+			else return len - 1;
+		}
+	}
+	return 0;
+}
+
+/* parse_math • parses a math span until the given ending delimiter */
+static size_t
+parse_math(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size, const char *end, size_t delimsz, int displaymode)
+{
+	hoedown_buffer text = { NULL, 0, 0, 0, NULL, NULL, NULL };
+	size_t i = delimsz;
+
+	if (!doc->md.math)
+		return 0;
+
+	/* find ending delimiter */
+	while (1) {
+		while (i < size && data[i] != (uint8_t)end[0])
+			i++;
+
+		if (i >= size)
+			return 0;
+
+		if (!is_escaped(data, i) && !(i + delimsz > size)
+			&& memcmp(data + i, end, delimsz) == 0)
+			break;
+
+		i++;
+	}
+
+	/* prepare buffers */
+	text.data = data + delimsz;
+	text.size = i - delimsz;
+
+	/* if this is a $$ and MATH_EXPLICIT is not active,
+	 * guess whether displaymode should be enabled from the context */
+	i += delimsz;
+	if (delimsz == 2 && !(doc->ext_flags & HOEDOWN_EXT_MATH_EXPLICIT))
+		displaymode = is_empty_all(data - offset, offset) && is_empty_all(data + i, size - i);
+
+	/* call callback */
+	if (doc->md.math(ob, &text, displaymode, &doc->data))
+		return i;
+
+	return 0;
+}
+
+/* char_emphasis • single and double emphasis parsing */
+static size_t
+char_emphasis(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
+{
+	uint8_t c = data[0];
+	size_t ret;
+
+	if (doc->ext_flags & HOEDOWN_EXT_NO_INTRA_EMPHASIS) {
+		if (offset > 0 && !_isspace(data[-1]) && data[-1] != '>' && data[-1] != '(')
+			return 0;
+	}
+
+	if (size > 2 && data[1] != c) {
+		/* spacing cannot follow an opening emphasis;
+		 * strikethrough and highlight only takes two characters '~~' */
+		if (c == '~' || c == '=' || _isspace(data[1]) || (ret = parse_emph1(ob, doc, data + 1, size - 1, c)) == 0)
+			return 0;
+
+		return ret + 1;
+	}
+
+	if (size > 3 && data[1] == c && data[2] != c) {
+		if (_isspace(data[2]) || (ret = parse_emph2(ob, doc, data + 2, size - 2, c)) == 0)
+			return 0;
+
+		return ret + 2;
+	}
+
+	if (size > 4 && data[1] == c && data[2] == c && data[3] != c) {
+		if (c == '~' || c == '=' || _isspace(data[3]) || (ret = parse_emph3(ob, doc, data + 3, size - 3, c)) == 0)
+			return 0;
+
+		return ret + 3;
+	}
+
+	return 0;
+}
+
+
+/* char_linebreak • '\n' preceded by two spaces (assuming linebreak != 0) */
+static size_t
+char_linebreak(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
+{
+	if (offset < 2 || data[-1] != ' ' || data[-2] != ' ')
+		return 0;
+
+	/* removing the last space from ob and rendering */
+	while (ob->size && ob->data[ob->size - 1] == ' ')
+		ob->size--;
+
+	return doc->md.linebreak(ob, &doc->data) ? 1 : 0;
+}
+
+
+/* char_codespan • '`' parsing a code span (assuming codespan != 0) */
+static size_t
+char_codespan(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
+{
+	hoedown_buffer work = { NULL, 0, 0, 0, NULL, NULL, NULL };
+	size_t end, nb = 0, i, f_begin, f_end;
+
+	/* counting the number of backticks in the delimiter */
+	while (nb < size && data[nb] == '`')
+		nb++;
+
+	/* finding the next delimiter */
+	i = 0;
+	for (end = nb; end < size && i < nb; end++) {
+		if (data[end] == '`') i++;
+		else i = 0;
+	}
+
+	if (i < nb && end >= size)
+		return 0; /* no matching delimiter */
+
+	/* trimming outside spaces */
+	f_begin = nb;
+	while (f_begin < end && data[f_begin] == ' ')
+		f_begin++;
+
+	f_end = end - nb;
+	while (f_end > nb && data[f_end-1] == ' ')
+		f_end--;
+
+	/* real code span */
+	if (f_begin < f_end) {
+		work.data = data + f_begin;
+		work.size = f_end - f_begin;
+
+		if (!doc->md.codespan(ob, &work, &doc->data))
+			end = 0;
+	} else {
+		if (!doc->md.codespan(ob, 0, &doc->data))
+			end = 0;
+	}
+
+	return end;
+}
+
+/* char_quote • '"' parsing a quote */
+static size_t
+char_quote(hoedown_buffer *ob, hoedown_document *doc, uint8_t *data, size_t offset, size_t size)
+{
+	size_t end, nq = 0, i, f_begin, f_end;
+
+	/* counting the number of quotes in the delimiter */
+	while (nq < size && data[nq] == '"')
+		nq++;
+
+	/* finding the next delimiter */
+	end = nq;
+	while (1) {
+		i = end;
+		end += find_emph_char(data + end, size - end, '"');
+		if (end == i) return 0;		/* no matching delimiter */
+		i = end;
+		while (end < size && data[end] == '"' && end - i < nq) end++;
+		if (end - i >= nq) break;
+	}
+
+	/* trimming outside spaces */
+	f_begin = nq;
+	while (f_begin < end && data[f_begin] == ' ')
+		f_begin++;
+
+	f_end = end - nq;
+	while (f_end > nq && data[f_end-1] == ' ')
+		f_end--;
+
+	/* real quote */
+	if (f_begin < f_end) {
+		hoedown_buffer *work = newbuf(doc, BUFFER_SPAN);