From 179fa22dcb9035248917197542488590b504817a Mon Sep 17 00:00:00 2001
From: Alexandre Leray <alexandre@alexandreleray.com>
Date: Sun, 27 May 2012 15:08:57 +0200
Subject: [PATCH 1/2] Removed -Wl flag in MakeFile. It was not compiling.

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index baca6875..fb268c99 100644
--- a/Makefile
+++ b/Makefile
@@ -44,7 +44,7 @@ libsundown.so:	libsundown.so.1
 	ln -f -s $^ $@
 
 libsundown.so.1: $(SUNDOWN_SRC)
-	$(CC) $(LDFLAGS) -shared -Wl $^ -o $@
+	$(CC) $(LDFLAGS) -shared $^ -o $@
 
 # executables
 

From 5c1b5e879520da7eee4a994acc2a59b55c57b326 Mon Sep 17 00:00:00 2001
From: Alexandre Leray <alexandre@alexandreleray.com>
Date: Sun, 27 May 2012 15:27:50 +0200
Subject: [PATCH 2/2] Added a <ins> tag extensions.

It can be used by enabling the MKDEXT_INS option like this
(example/sundown.c):

    markdown = sd_markdown_new(MKDEXT_INS, 16, &callbacks, &options)

then, after compilation the following command line:

    echo "++ins++" | ./sundown

results in:

    <p><ins>ins</ins></p>
---
 html/html.c    | 14 ++++++++++++++
 src/markdown.c |  8 ++++++--
 src/markdown.h |  2 ++
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/html/html.c b/html/html.c
index 7f08ee8e..bc11d5de 100755
--- a/html/html.c
+++ b/html/html.c
@@ -169,6 +169,18 @@ rndr_codespan(struct buf *ob, const struct buf *text, void *opaque)
 	return 1;
 }
 
+static int
+rndr_ins(struct buf *ob, const struct buf *text, void *opaque)
+{
+	if (!text || !text->size)
+		return 0;
+
+	BUFPUTSL(ob, "<ins>");
+	bufput(ob, text->data, text->size);
+	BUFPUTSL(ob, "</ins>");
+	return 1;
+}
+
 static int
 rndr_strikethrough(struct buf *ob, const struct buf *text, void *opaque)
 {
@@ -564,6 +576,7 @@ sdhtml_toc_renderer(struct sd_callbacks *callbacks, struct html_renderopt *optio
 		toc_link,
 		NULL,
 		rndr_triple_emphasis,
+		rndr_ins,
 		rndr_strikethrough,
 		rndr_superscript,
 
@@ -605,6 +618,7 @@ sdhtml_renderer(struct sd_callbacks *callbacks, struct html_renderopt *options,
 		rndr_link,
 		rndr_raw_html,
 		rndr_triple_emphasis,
+		rndr_ins,
 		rndr_strikethrough,
 		rndr_superscript,
 
diff --git a/src/markdown.c b/src/markdown.c
index 260483d6..e43fc693 100644
--- a/src/markdown.c
+++ b/src/markdown.c
@@ -526,6 +526,7 @@ parse_emph2(struct buf *ob, struct sd_markdown *rndr, uint8_t *data, size_t size
 	int r;
 
 	render_method = (c == '~') ? rndr->cb.strikethrough : rndr->cb.double_emphasis;
+	render_method = (c == '+') ? rndr->cb.ins : render_method;
 
 	if (!render_method)
 		return 0;
@@ -598,8 +599,9 @@ char_emphasis(struct buf *ob, struct sd_markdown *rndr, uint8_t *data, size_t of
 
 	if (size > 2 && data[1] != c) {
 		/* whitespace cannot follow an opening emphasis;
+		 * ins only takes two characters '++'
 		 * strikethrough only takes two characters '~~' */
-		if (c == '~' || _isspace(data[1]) || (ret = parse_emph1(ob, rndr, data + 1, size - 1, c)) == 0)
+		if (c == '+' || c == '~' || _isspace(data[1]) || (ret = parse_emph1(ob, rndr, data + 1, size - 1, c)) == 0)
 			return 0;
 
 		return ret + 1;
@@ -613,7 +615,7 @@ char_emphasis(struct buf *ob, struct sd_markdown *rndr, uint8_t *data, size_t of
 	}
 
 	if (size > 4 && data[1] == c && data[2] == c && data[3] != c) {
-		if (c == '~' || _isspace(data[3]) || (ret = parse_emph3(ob, rndr, data + 3, size - 3, c)) == 0)
+		if (c == '+' || c == '~' || _isspace(data[3]) || (ret = parse_emph3(ob, rndr, data + 3, size - 3, c)) == 0)
 			return 0;
 
 		return ret + 3;
@@ -2415,6 +2417,8 @@ sd_markdown_new(
 		md->active_char['_'] = MD_CHAR_EMPHASIS;
 		if (extensions & MKDEXT_STRIKETHROUGH)
 			md->active_char['~'] = MD_CHAR_EMPHASIS;
+		if (extensions & MKDEXT_INS)
+			md->active_char['+'] = MD_CHAR_EMPHASIS;
 	}
 
 	if (md->cb.codespan)
diff --git a/src/markdown.h b/src/markdown.h
index 6f6553ec..936aa399 100644
--- a/src/markdown.h
+++ b/src/markdown.h
@@ -56,6 +56,7 @@ enum mkd_extensions {
 	MKDEXT_FENCED_CODE = (1 << 2),
 	MKDEXT_AUTOLINK = (1 << 3),
 	MKDEXT_STRIKETHROUGH = (1 << 4),
+	MKDEXT_INS = (1 << 5),
 	MKDEXT_SPACE_HEADERS = (1 << 6),
 	MKDEXT_SUPERSCRIPT = (1 << 7),
 	MKDEXT_LAX_SPACING = (1 << 8),
@@ -87,6 +88,7 @@ struct sd_callbacks {
 	int (*link)(struct buf *ob, const struct buf *link, const struct buf *title, const struct buf *content, void *opaque);
 	int (*raw_html_tag)(struct buf *ob, const struct buf *tag, void *opaque);
 	int (*triple_emphasis)(struct buf *ob, const struct buf *text, void *opaque);
+	int (*ins)(struct buf *ob, const struct buf *text, void *opaque);
 	int (*strikethrough)(struct buf *ob, const struct buf *text, void *opaque);
 	int (*superscript)(struct buf *ob, const struct buf *text, void *opaque);