Use clang-format, llvm style, for formatting.

* Reformatted all source files.
* Added 'format' target to Makefile.
* Removed 'astyle' target.
* Updated .editorconfig.

1 files changed, 909 insertions, 947 deletions

diff --git a/src/blocks.c b/src/blocks.c
index 8828a11..c466fc2 100644
--- a/src/blocks.c
+++ b/src/blocks.c
@@ -19,1036 +19,998 @@
 
 #define peek_at(i, n) (i)->data[n]
 
-static inline bool
-S_is_line_end_char(char c)
-{
-	return (c == '\n' || c == '\r');
+static inline bool S_is_line_end_char(char c) {
+  return (c == '\n' || c == '\r');
 }
 
-static void
-S_parser_feed(cmark_parser *parser, const unsigned char *buffer, size_t len,
-              bool eof);
-
-static void
-S_process_line(cmark_parser *parser, const unsigned char *buffer,
-               bufsize_t bytes);
-
-static cmark_node* make_block(cmark_node_type tag, int start_line, int start_column)
-{
-	cmark_node* e;
-
-	e = (cmark_node *)calloc(1, sizeof(*e));
-	if(e != NULL) {
-		e->type = tag;
-		e->open = true;
-		e->start_line = start_line;
-		e->start_column = start_column;
-		e->end_line = start_line;
-		cmark_strbuf_init(&e->string_content, 32);
-	}
-
-	return e;
+static void S_parser_feed(cmark_parser *parser, const unsigned char *buffer,
+                          size_t len, bool eof);
+
+static void S_process_line(cmark_parser *parser, const unsigned char *buffer,
+                           bufsize_t bytes);
+
+static cmark_node *make_block(cmark_node_type tag, int start_line,
+                              int start_column) {
+  cmark_node *e;
+
+  e = (cmark_node *)calloc(1, sizeof(*e));
+  if (e != NULL) {
+    e->type = tag;
+    e->open = true;
+    e->start_line = start_line;
+    e->start_column = start_column;
+    e->end_line = start_line;
+    cmark_strbuf_init(&e->string_content, 32);
+  }
+
+  return e;
 }
 
 // Create a root document node.
-static cmark_node* make_document()
-{
-	cmark_node *e = make_block(NODE_DOCUMENT, 1, 1);
-	return e;
+static cmark_node *make_document() {
+  cmark_node *e = make_block(NODE_DOCUMENT, 1, 1);
+  return e;
 }
 
-cmark_parser *cmark_parser_new(int options)
-{
-	cmark_parser *parser = (cmark_parser*)malloc(sizeof(cmark_parser));
-	cmark_node *document = make_document();
-	cmark_strbuf *line = (cmark_strbuf*)malloc(sizeof(cmark_strbuf));
-	cmark_strbuf *buf  = (cmark_strbuf*)malloc(sizeof(cmark_strbuf));
-	cmark_strbuf_init(line, 256);
-	cmark_strbuf_init(buf, 0);
-
-	parser->refmap = cmark_reference_map_new();
-	parser->root = document;
-	parser->current = document;
-	parser->line_number = 0;
-	parser->offset = 0;
-	parser->column = 0;
-	parser->first_nonspace = 0;
-	parser->first_nonspace_column = 0;
-	parser->indent = 0;
-	parser->blank = false;
-	parser->curline = line;
-	parser->last_line_length = 0;
-	parser->linebuf = buf;
-	parser->options = options;
-
-	return parser;
+cmark_parser *cmark_parser_new(int options) {
+  cmark_parser *parser = (cmark_parser *)malloc(sizeof(cmark_parser));
+  cmark_node *document = make_document();
+  cmark_strbuf *line = (cmark_strbuf *)malloc(sizeof(cmark_strbuf));
+  cmark_strbuf *buf = (cmark_strbuf *)malloc(sizeof(cmark_strbuf));
+  cmark_strbuf_init(line, 256);
+  cmark_strbuf_init(buf, 0);
+
+  parser->refmap = cmark_reference_map_new();
+  parser->root = document;
+  parser->current = document;
+  parser->line_number = 0;
+  parser->offset = 0;
+  parser->column = 0;
+  parser->first_nonspace = 0;
+  parser->first_nonspace_column = 0;
+  parser->indent = 0;
+  parser->blank = false;
+  parser->curline = line;
+  parser->last_line_length = 0;
+  parser->linebuf = buf;
+  parser->options = options;
+
+  return parser;
 }
 
-void cmark_parser_free(cmark_parser *parser)
-{
-	cmark_strbuf_free(parser->curline);
-	free(parser->curline);
-	cmark_strbuf_free(parser->linebuf);
-	free(parser->linebuf);
-	cmark_reference_map_free(parser->refmap);
-	free(parser);
+void cmark_parser_free(cmark_parser *parser) {
+  cmark_strbuf_free(parser->curline);
+  free(parser->curline);
+  cmark_strbuf_free(parser->linebuf);
+  free(parser->linebuf);
+  cmark_reference_map_free(parser->refmap);
+  free(parser);
 }
 
-static cmark_node*
-finalize(cmark_parser *parser, cmark_node* b);
+static cmark_node *finalize(cmark_parser *parser, cmark_node *b);
 
 // Returns true if line has only space characters, else false.
-static bool is_blank(cmark_strbuf *s, bufsize_t offset)
-{
-	while (offset < s->size) {
-		switch (s->ptr[offset]) {
-		case '\r':
-		case '\n':
-			return true;
-		case ' ':
-			offset++;
-			break;
-		case '\t':
-			offset++;
-			break;
-		default:
-			return false;
-		}
-	}
-
-	return true;
+static bool is_blank(cmark_strbuf *s, bufsize_t offset) {
+  while (offset < s->size) {
+    switch (s->ptr[offset]) {
+    case '\r':
+    case '\n':
+      return true;
+    case ' ':
+      offset++;
+      break;
+    case '\t':
+      offset++;
+      break;
+    default:
+      return false;
+    }
+  }
+
+  return true;
 }
 
-static inline bool can_contain(cmark_node_type parent_type, cmark_node_type child_type)
-{
-	return ( parent_type == NODE_DOCUMENT ||
-	         parent_type == NODE_BLOCK_QUOTE ||
-	         parent_type == NODE_ITEM ||
-	         (parent_type == NODE_LIST && child_type == NODE_ITEM) );
+static inline bool can_contain(cmark_node_type parent_type,
+                               cmark_node_type child_type) {
+  return (parent_type == NODE_DOCUMENT || parent_type == NODE_BLOCK_QUOTE ||
+          parent_type == NODE_ITEM ||
+          (parent_type == NODE_LIST && child_type == NODE_ITEM));
 }
 
-static inline bool accepts_lines(cmark_node_type block_type)
-{
-	return (block_type == NODE_PARAGRAPH ||
-	        block_type == NODE_HEADER ||
-	        block_type == NODE_CODE_BLOCK);
+static inline bool accepts_lines(cmark_node_type block_type) {
+  return (block_type == NODE_PARAGRAPH || block_type == NODE_HEADER ||
+          block_type == NODE_CODE_BLOCK);
 }
 
-static void add_line(cmark_node* node, cmark_chunk *ch, bufsize_t offset)
-{
-	assert(node->open);
-	cmark_strbuf_put(&node->string_content, ch->data + offset, ch->len - offset);
+static void add_line(cmark_node *node, cmark_chunk *ch, bufsize_t offset) {
+  assert(node->open);
+  cmark_strbuf_put(&node->string_content, ch->data + offset, ch->len - offset);
 }
 
-static void remove_trailing_blank_lines(cmark_strbuf *ln)
-{
-	bufsize_t i;
-	unsigned char c;
-
-	for (i = ln->size - 1; i >= 0; --i) {
-		c = ln->ptr[i];
+static void remove_trailing_blank_lines(cmark_strbuf *ln) {
+  bufsize_t i;
+  unsigned char c;
 
-		if (c != ' ' && c != '\t' && !S_is_line_end_char(c))
-			break;
-	}
+  for (i = ln->size - 1; i >= 0; --i) {
+    c = ln->ptr[i];
 
-	if (i < 0) {
-		cmark_strbuf_clear(ln);
-		return;
-	}
+    if (c != ' ' && c != '\t' && !S_is_line_end_char(c))
+      break;
+  }
 
+  if (i < 0) {
+    cmark_strbuf_clear(ln);
+    return;
+  }
 
-	for(; i < ln->size; ++i) {
-		c = ln->ptr[i];
+  for (; i < ln->size; ++i) {
+    c = ln->ptr[i];
 
-		if (!S_is_line_end_char(c))
-			continue;
+    if (!S_is_line_end_char(c))
+      continue;
 
-		cmark_strbuf_truncate(ln, i);
-		break;
-	}
+    cmark_strbuf_truncate(ln, i);
+    break;
+  }
 }
 
 // Check to see if a node ends with a blank line, descending
 // if needed into lists and sublists.
-static bool ends_with_blank_line(cmark_node* node)
-{
-	cmark_node *cur = node;
-	while (cur != NULL) {
-		if (cur->last_line_blank) {
-			return true;
-		}
-		if (cur->type == NODE_LIST || cur->type == NODE_ITEM) {
-			cur = cur->last_child;
-		} else {
-			cur = NULL;
-		}
-	}
-	return false;
+static bool ends_with_blank_line(cmark_node *node) {
+  cmark_node *cur = node;
+  while (cur != NULL) {
+    if (cur->last_line_blank) {
+      return true;
+    }
+    if (cur->type == NODE_LIST || cur->type == NODE_ITEM) {
+      cur = cur->last_child;
+    } else {
+      cur = NULL;
+    }
+  }
+  return false;
 }
 
 // Break out of all containing lists
-static int break_out_of_lists(cmark_parser *parser, cmark_node ** bptr)
-{
-	cmark_node *container = *bptr;
-	cmark_node *b = parser->root;
-	// find first containing NODE_LIST:
-	while (b && b->type != NODE_LIST) {
-		b = b->last_child;
-	}
-	if (b) {
-		while (container && container != b) {
-			container = finalize(parser, container);
-		}
-		finalize(parser, b);
-		*bptr = b->parent;
-	}
-	return 0;
+static int break_out_of_lists(cmark_parser *parser, cmark_node **bptr) {
+  cmark_node *container = *bptr;
+  cmark_node *b = parser->root;
+  // find first containing NODE_LIST:
+  while (b && b->type != NODE_LIST) {
+    b = b->last_child;
+  }
+  if (b) {
+    while (container && container != b) {
+      container = finalize(parser, container);
+    }
+    finalize(parser, b);
+    *bptr = b->parent;
+  }
+  return 0;
 }
 
-
-static cmark_node*
-finalize(cmark_parser *parser, cmark_node* b)
-{
-	bufsize_t pos;
-	cmark_node* item;
-	cmark_node* subitem;
-	cmark_node* parent;
-
-	parent = b->parent;
-
-	assert(b->open);  // shouldn't call finalize on closed blocks
-	b->open = false;
-
-	if (parser->curline->size == 0) {
-		// end of input - line number has not been incremented
-		b->end_line = parser->line_number;
-		b->end_column = parser->last_line_length;
-	} else if (b->type == NODE_DOCUMENT ||
-	           (b->type == NODE_CODE_BLOCK && b->as.code.fenced) ||
-	           (b->type == NODE_HEADER && b->as.header.setext)) {
-		b->end_line = parser->line_number;
-		b->end_column = parser->curline->size;
-		if (b->end_column && parser->curline->ptr[b->end_column - 1] == '\n')
-			b->end_column -= 1;
-		if (b->end_column && parser->curline->ptr[b->end_column - 1] == '\r')
-			b->end_column -= 1;
-	} else {
-		b->end_line = parser->line_number - 1;
-		b->end_column = parser->last_line_length;
-	}
-
-	switch (b->type) {
-	case NODE_PARAGRAPH:
-		while (cmark_strbuf_at(&b->string_content, 0) == '[' &&
-		       (pos = cmark_parse_reference_inline(&b->string_content, parser->refmap))) {
-
-			cmark_strbuf_drop(&b->string_content, pos);
-		}
-		if (is_blank(&b->string_content, 0)) {
-			// remove blank node (former reference def)
-			cmark_node_free(b);
-		}
-		break;
-
-	case NODE_CODE_BLOCK:
-		if (!b->as.code.fenced) { // indented code
-			remove_trailing_blank_lines(&b->string_content);
-			cmark_strbuf_putc(&b->string_content, '\n');
-		} else {
-
-			// first line of contents becomes info
-			for (pos = 0; pos < b->string_content.size; ++pos) {
-				if (S_is_line_end_char(b->string_content.ptr[pos]))
-					break;
-			}
-			assert(pos < b->string_content.size);
-
-			cmark_strbuf tmp = GH_BUF_INIT;
-			houdini_unescape_html_f(
-			    &tmp,
-			    b->string_content.ptr,
-			    pos
-			);
-			cmark_strbuf_trim(&tmp);
-			cmark_strbuf_unescape(&tmp);
-			b->as.code.info = cmark_chunk_buf_detach(&tmp);
-
-			if (b->string_content.ptr[pos] == '\r')
-				pos += 1;
-			if (b->string_content.ptr[pos] == '\n')
-				pos += 1;
-			cmark_strbuf_drop(&b->string_content, pos);
-		}
-		b->as.code.literal = cmark_chunk_buf_detach(&b->string_content);
-		break;
-
-	case NODE_HTML:
-		b->as.literal = cmark_chunk_buf_detach(&b->string_content);
-		break;
-
-	case NODE_LIST: // determine tight/loose status
-		b->as.list.tight = true; // tight by default
-		item = b->first_child;
-
-		while (item) {
-			// check for non-final non-empty list item ending with blank line:
-			if (item->last_line_blank && item->next) {
-				b->as.list.tight = false;
-				break;
-			}
-			// recurse into children of list item, to see if there are
-			// spaces between them:
-			subitem = item->first_child;
-			while (subitem) {
-				if (ends_with_blank_line(subitem) &&
-				    (item->next || subitem->next)) {
-					b->as.list.tight = false;
-					break;
-				}
-				subitem = subitem->next;
-			}
-			if (!(b->as.list.tight)) {
-				break;
-			}
-			item = item->next;
-		}
-
-		break;
-
-	default:
-		break;
-	}
-	return parent;
+static cmark_node *finalize(cmark_parser *parser, cmark_node *b) {
+  bufsize_t pos;
+  cmark_node *item;
+  cmark_node *subitem;
+  cmark_node *parent;
+
+  parent = b->parent;
+
+  assert(b->open); // shouldn't call finalize on closed blocks
+  b->open = false;
+
+  if (parser->curline->size == 0) {
+    // end of input - line number has not been incremented
+    b->end_line = parser->line_number;
+    b->end_column = parser->last_line_length;
+  } else if (b->type == NODE_DOCUMENT ||
+             (b->type == NODE_CODE_BLOCK && b->as.code.fenced) ||
+             (b->type == NODE_HEADER && b->as.header.setext)) {
+    b->end_line = parser->line_number;
+    b->end_column = parser->curline->size;
+    if (b->end_column && parser->curline->ptr[b->end_column - 1] == '\n')
+      b->end_column -= 1;
+    if (b->end_column && parser->curline->ptr[b->end_column - 1] == '\r')
+      b->end_column -= 1;
+  } else {
+    b->end_line = parser->line_number - 1;
+    b->end_column = parser->last_line_length;
+  }
+
+  switch (b->type) {
+  case NODE_PARAGRAPH:
+    while (cmark_strbuf_at(&b->string_content, 0) == '[' &&
+           (pos = cmark_parse_reference_inline(&b->string_content,
+                                               parser->refmap))) {
+
+      cmark_strbuf_drop(&b->string_content, pos);
+    }
+    if (is_blank(&b->string_content, 0)) {
+      // remove blank node (former reference def)
+      cmark_node_free(b);
+    }
+    break;
+
+  case NODE_CODE_BLOCK:
+    if (!b->as.code.fenced) { // indented code
+      remove_trailing_blank_lines(&b->string_content);
+      cmark_strbuf_putc(&b->string_content, '\n');
+    } else {
+
+      // first line of contents becomes info
+      for (pos = 0; pos < b->string_content.size; ++pos) {
+        if (S_is_line_end_char(b->string_content.ptr[pos]))
+          break;
+      }
+      assert(pos < b->string_content.size);
+
+      cmark_strbuf tmp = GH_BUF_INIT;
+      houdini_unescape_html_f(&tmp, b->string_content.ptr, pos);
+      cmark_strbuf_trim(&tmp);
+      cmark_strbuf_unescape(&tmp);
+      b->as.code.info = cmark_chunk_buf_detach(&tmp);
+
+      if (b->string_content.ptr[pos] == '\r')
+        pos += 1;
+      if (b->string_content.ptr[pos] == '\n')
+        pos += 1;
+      cmark_strbuf_drop(&b->string_content, pos);
+    }
+    b->as.code.literal = cmark_chunk_buf_detach(&b->string_content);
+    break;
+
+  case NODE_HTML:
+    b->as.literal = cmark_chunk_buf_detach(&b->string_content);
+    break;
+
+  case NODE_LIST:            // determine tight/loose status
+    b->as.list.tight = true; // tight by default
+    item = b->first_child;
+
+    while (item) {
+      // check for non-final non-empty list item ending with blank line:
+      if (item->last_line_blank && item->next) {
+        b->as.list.tight = false;
+        break;
+      }
+      // recurse into children of list item, to see if there are
+      // spaces between them:
+      subitem = item->first_child;
+      while (subitem) {
+        if (ends_with_blank_line(subitem) && (item->next || subitem->next)) {
+          b->as.list.tight = false;
+          break;
+        }
+        subitem = subitem->next;
+      }
+      if (!(b->as.list.tight)) {
+        break;
+      }
+      item = item->next;
+    }
+
+    break;
+
+  default:
+    break;
+  }
+  return parent;
 }
 
 // Add a node as child of another.  Return pointer to child.
-static cmark_node* add_child(cmark_parser *parser, cmark_node* parent,
-                             cmark_node_type block_type, int start_column)
-{
-	assert(parent);
-
-	// if 'parent' isn't the kind of node that can accept this child,
-	// then back up til we hit a node that can.
-	while (!can_contain(parent->type, block_type)) {
-		parent = finalize(parser, parent);
-	}
-
-	cmark_node* child = make_block(block_type, parser->line_number, start_column);
-	child->parent = parent;
-
-	if (parent->last_child) {
-		parent->last_child->next = child;
-		child->prev = parent->last_child;
-	} else {
-		parent->first_child = child;
-		child->prev = NULL;
-	}
-	parent->last_child = child;
-	return child;
+static cmark_node *add_child(cmark_parser *parser, cmark_node *parent,
+                             cmark_node_type block_type, int start_column) {
+  assert(parent);
+
+  // if 'parent' isn't the kind of node that can accept this child,
+  // then back up til we hit a node that can.
+  while (!can_contain(parent->type, block_type)) {
+    parent = finalize(parser, parent);
+  }
+
+  cmark_node *child = make_block(block_type, parser->line_number, start_column);
+  child->parent = parent;
+
+  if (parent->last_child) {
+    parent->last_child->next = child;
+    child->prev = parent->last_child;
+  } else {
+    parent->first_child = child;
+    child->prev = NULL;
+  }
+  parent->last_child = child;
+  return child;
 }
 
-
 // Walk through node and all children, recursively, parsing
 // string content into inline content where appropriate.
-static void process_inlines(cmark_node* root, cmark_reference_map *refmap, int options)
-{
-	cmark_iter *iter = cmark_iter_new(root);
-	cmark_node *cur;
-	cmark_event_type ev_type;
-
-	while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
-		cur = cmark_iter_get_node(iter);
-		if (ev_type == CMARK_EVENT_ENTER) {
-			if (cur->type == NODE_PARAGRAPH ||
-			    cur->type == NODE_HEADER) {
-				cmark_parse_inlines(cur, refmap, options);
-			}
-		}
-	}
-
-	cmark_iter_free(iter);
+static void process_inlines(cmark_node *root, cmark_reference_map *refmap,
+                            int options) {
+  cmark_iter *iter = cmark_iter_new(root);
+  cmark_node *cur;
+  cmark_event_type ev_type;
+
+  while ((ev_type = cmark_iter_next(iter)) != CMARK_EVENT_DONE) {
+    cur = cmark_iter_get_node(iter);
+    if (ev_type == CMARK_EVENT_ENTER) {
+      if (cur->type == NODE_PARAGRAPH || cur->type == NODE_HEADER) {
+        cmark_parse_inlines(cur, refmap, options);
+      }
+    }
+  }
+
+  cmark_iter_free(iter);
 }
 
 // Attempts to parse a list item marker (bullet or enumerated).
 // On success, returns length of the marker, and populates
 // data with the details.  On failure, returns 0.
-static bufsize_t parse_list_marker(cmark_chunk *input, bufsize_t pos, cmark_list **dataptr)
-{
-	unsigned char c;
-	bufsize_t startpos;
-	cmark_list *data;
-
-	startpos = pos;
-	c = peek_at(input, pos);
-
-	if (c == '*' || c == '-' || c == '+') {
-		pos++;
-		if (!cmark_isspace(peek_at(input, pos))) {
-			return 0;
-		}
-		data = (cmark_list *)calloc(1, sizeof(*data));
-		if(data == NULL) {
-			return 0;
-		} else {
-			data->marker_offset = 0; // will be adjusted later
-			data->list_type = CMARK_BULLET_LIST;
-			data->bullet_char = c;
-			data->start = 1;
-			data->delimiter = CMARK_PERIOD_DELIM;
-			data->tight = false;
-		}
-	} else if (cmark_isdigit(c)) {
-		int start = 0;
-		int digits = 0;
-
-		do {
-			start = (10 * start) + (peek_at(input, pos) - '0');
-			pos++;
-			digits++;
-			// We limit to 9 digits to avoid overflow,
-			// assuming max int is 2^31 - 1
-			// This also seems to be the limit for 'start' in some browsers.
-		} while (digits < 9 && cmark_isdigit(peek_at(input, pos)));
-
-		c = peek_at(input, pos);
-		if (c == '.' || c == ')') {
-			pos++;
-			if (!cmark_isspace(peek_at(input, pos))) {
-				return 0;
-			}
-			data = (cmark_list *)calloc(1, sizeof(*data));
-			if(data == NULL) {
-				return 0;
-			} else {
-				data->marker_offset = 0; // will be adjusted later
-				data->list_type = CMARK_ORDERED_LIST;
-				data->bullet_char = 0;
-				data->start = start;
-				data->delimiter = (c == '.' ? CMARK_PERIOD_DELIM : CMARK_PAREN_DELIM);
-				data->tight = false;
-			}
-		} else {
-			return 0;
-		}
-
-	} else {
-		return 0;
-	}
-
-	*dataptr = data;
-	return (pos - startpos);
+static bufsize_t parse_list_marker(cmark_chunk *input, bufsize_t pos,
+                                   cmark_list **dataptr) {
+  unsigned char c;
+  bufsize_t startpos;
+  cmark_list *data;
+
+  startpos = pos;
+  c = peek_at(input, pos);
+
+  if (c == '*' || c == '-' || c == '+') {
+    pos++;
+    if (!cmark_isspace(peek_at(input, pos))) {
+      return 0;
+    }
+    data = (cmark_list *)calloc(1, sizeof(*data));
+    if (data == NULL) {
+      return 0;
+    } else {
+      data->marker_offset = 0; // will be adjusted later
+      data->list_type = CMARK_BULLET_LIST;
+      data->bullet_char = c;
+      data->start = 1;
+      data->delimiter = CMARK_PERIOD_DELIM;
+      data->tight = false;
+    }
+  } else if (cmark_isdigit(c)) {
+    int start = 0;
+    int digits = 0;
+
+    do {
+      start = (10 * start) + (peek_at(input, pos) - '0');
+      pos++;
+      digits++;
+      // We limit to 9 digits to avoid overflow,
+      // assuming max int is 2^31 - 1
+      // This also seems to be the limit for 'start' in some browsers.
+    } while (digits < 9 && cmark_isdigit(peek_at(input, pos)));
+
+    c = peek_at(input, pos);
+    if (c == '.' || c == ')') {
+      pos++;
+      if (!cmark_isspace(peek_at(input, pos))) {
+        return 0;
+      }
+      data = (cmark_list *)calloc(1, sizeof(*data));
+      if (data == NULL) {
+        return 0;
+      } else {
+        data->marker_offset = 0; // will be adjusted later
+        data->list_type = CMARK_ORDERED_LIST;
+        data->bullet_char = 0;
+        data->start = start;
+        data->delimiter = (c == '.' ? CMARK_PERIOD_DELIM : CMARK_PAREN_DELIM);
+        data->tight = false;
+      }
+    } else {
+      return 0;
+    }
+
+  } else {
+    return 0;
+  }
+
+  *dataptr = data;
+  return (pos - startpos);
 }
 
 // Return 1 if list item belongs in list, else 0.
-static int lists_match(cmark_list *list_data, cmark_list *item_data)
-{
-	return (list_data->list_type == item_data->list_type &&
-	        list_data->delimiter == item_data->delimiter &&
-	        // list_data->marker_offset == item_data.marker_offset &&
-	        list_data->bullet_char == item_data->bullet_char);
+static int lists_match(cmark_list *list_data, cmark_list *item_data) {
+  return (list_data->list_type == item_data->list_type &&
+          list_data->delimiter == item_data->delimiter &&
+          // list_data->marker_offset == item_data.marker_offset &&
+          list_data->bullet_char == item_data->bullet_char);
 }
 
-static cmark_node *finalize_document(cmark_parser *parser)
-{
-	while (parser->current != parser->root) {
-		parser->current = finalize(parser, parser->current);
-	}
+static cmark_node *finalize_document(cmark_parser *parser) {
+  while (parser->current != parser->root) {
+    parser->current = finalize(parser, parser->current);
+  }
 
-	finalize(parser, parser->root);
-	process_inlines(parser->root, parser->refmap, parser->options);
+  finalize(parser, parser->root);
+  process_inlines(parser->root, parser->refmap, parser->options);
 
-	return parser->root;
+  return parser->root;
 }
 
-cmark_node *cmark_parse_file(FILE *f, int options)
-{
-	unsigned char buffer[4096];
-	cmark_parser *parser = cmark_parser_new(options);
-	size_t bytes;
-	cmark_node *document;
-
-	while ((bytes = fread(buffer, 1, sizeof(buffer), f)) > 0) {
-		bool eof = bytes < sizeof(buffer);
-		S_parser_feed(parser, buffer, bytes, eof);
-		if (eof) {
-			break;
-		}
-	}
-
-	document = cmark_parser_finish(parser);
-	cmark_parser_free(parser);
-	return document;
+cmark_node *cmark_parse_file(FILE *f, int options) {
+  unsigned char buffer[4096];
+  cmark_parser *parser = cmark_parser_new(options);
+  size_t bytes;
+  cmark_node *document;
+
+  while ((bytes = fread(buffer, 1, sizeof(buffer), f)) > 0) {
+    bool eof = bytes < sizeof(buffer);
+    S_parser_feed(parser, buffer, bytes, eof);
+    if (eof) {
+      break;
+    }
+  }
+
+  document = cmark_parser_finish(parser);
+  cmark_parser_free(parser);
+  return document;
 }
 
-cmark_node *cmark_parse_document(const char *buffer, size_t len, int options)
-{
-	cmark_parser *parser = cmark_parser_new(options);
-	cmark_node *document;
+cmark_node *cmark_parse_document(const char *buffer, size_t len, int options) {
+  cmark_parser *parser = cmark_parser_new(options);
+  cmark_node *document;
 
-	S_parser_feed(parser, (const unsigned char *)buffer, len, true);
+  S_parser_feed(parser, (const unsigned char *)buffer, len, true);
 
-	document = cmark_parser_finish(parser);
-	cmark_parser_free(parser);
-	return document;
+  document = cmark_parser_finish(parser);
+  cmark_parser_free(parser);
+  return document;
 }
 
-void
-cmark_parser_feed(cmark_parser *parser, const char *buffer, size_t len)
-{
-	S_parser_feed(parser, (const unsigned char *)buffer, len, false);
+void cmark_parser_feed(cmark_parser *parser, const char *buffer, size_t len) {
+  S_parser_feed(parser, (const unsigned char *)buffer, len, false);
 }
 
-static void
-S_parser_feed(cmark_parser *parser, const unsigned char *buffer, size_t len,
-              bool eof)
-{
-	const unsigned char *end = buffer + len;
-	static const uint8_t repl[] = {239, 191, 189};
-
-	while (buffer < end) {
-		const unsigned char *eol;
-		bufsize_t chunk_len;
-		bool process = false;
-		for (eol = buffer; eol < end; ++eol) {
-			if (S_is_line_end_char(*eol)) {
-				if (eol < end && *eol == '\r')
-					eol++;
-				if (eol < end && *eol == '\n')
-					eol++;
-				process = true;
-				break;
-			}
-			if (*eol == '\0' && eol < end) {
-				break;
-			}
-		}
-		if (eol >= end && eof) {
-			process = true;
-		}
-
-		chunk_len = cmark_strbuf_check_bufsize(eol - buffer);
-		if (process) {
-			if (parser->linebuf->size > 0) {
-				cmark_strbuf_put(parser->linebuf, buffer, chunk_len);
-				S_process_line(parser, parser->linebuf->ptr,
-				               parser->linebuf->size);
-				cmark_strbuf_clear(parser->linebuf);
-			} else {
-				S_process_line(parser, buffer, chunk_len);
-			}
-		} else {
-			if (eol < end && *eol == '\0') {
-				// omit NULL byte
-				cmark_strbuf_put(parser->linebuf, buffer, chunk_len);
-				// add replacement character
-				cmark_strbuf_put(parser->linebuf, repl, 3);
-				chunk_len += 1; // so we advance the buffer past NULL
-			} else {
-				cmark_strbuf_put(parser->linebuf, buffer, chunk_len);
-			}
-		}
-
-		buffer += chunk_len;
-	}
+static void S_parser_feed(cmark_parser *parser, const unsigned char *buffer,
+                          size_t len, bool eof) {
+  const unsigned char *end = buffer + len;
+  static const uint8_t repl[] = {239, 191, 189};
+
+  while (buffer < end) {
+    const unsigned char *eol;
+    bufsize_t chunk_len;
+    bool process = false;
+    for (eol = buffer; eol < end; ++eol) {
+      if (S_is_line_end_char(*eol)) {
+        if (eol < end && *eol == '\r')
+          eol++;
+        if (eol < end && *eol == '\n')
+          eol++;
+        process = true;
+        break;
+      }
+      if (*eol == '\0' && eol < end) {
+        break;
+      }
+    }
+    if (eol >= end && eof) {
+      process = true;
+    }
+
+    chunk_len = cmark_strbuf_check_bufsize(eol - buffer);
+    if (process) {
+      if (parser->linebuf->size > 0) {
+        cmark_strbuf_put(parser->linebuf, buffer, chunk_len);
+        S_process_line(parser, parser->linebuf->ptr, parser->linebuf->size);
+        cmark_strbuf_clear(parser->linebuf);
+      } else {
+        S_process_line(parser, buffer, chunk_len);
+      }
+    } else {
+      if (eol < end && *eol == '\0') {
+        // omit NULL byte
+        cmark_strbuf_put(parser->linebuf, buffer, chunk_len);
+        // add replacement character
+        cmark_strbuf_put(parser->linebuf, repl, 3);
+        chunk_len += 1; // so we advance the buffer past NULL
+      } else {
+        cmark_strbuf_put(parser->linebuf, buffer, chunk_len);
+      }
+    }
+
+    buffer += chunk_len;
+  }
 }
 
-static void chop_trailing_hashtags(cmark_chunk *ch)
-{
-	bufsize_t n, orig_n;
+static void chop_trailing_hashtags(cmark_chunk *ch) {
+  bufsize_t n, orig_n;
 
-	cmark_chunk_rtrim(ch);
-	orig_n = n = ch->len - 1;
+  cmark_chunk_rtrim(ch);
+  orig_n = n = ch->len - 1;
 
-	// if string ends in space followed by #s, remove these:
-	while (n >= 0 && peek_at(ch, n) == '#')
-		n--;
+  // if string ends in space followed by #s, remove these:
+  while (n >= 0 && peek_at(ch, n) == '#')
+    n--;
 
-	// Check for a space before the final #s:
-	if (n != orig_n && n >= 0 &&
-	    (peek_at(ch, n) == ' ' || peek_at(ch, n) == '\t')) {
-		ch->len = n;
-		cmark_chunk_rtrim(ch);
-	}
+  // Check for a space before the final #s:
+  if (n != orig_n && n >= 0 &&
+      (peek_at(ch, n) == ' ' || peek_at(ch, n) == '\t')) {
+    ch->len = n;
+    cmark_chunk_rtrim(ch);
+  }
 }
 
-static void
-S_find_first_nonspace(cmark_parser *parser, cmark_chunk *input)
-{
-	char c;
-	int chars_to_tab = TAB_STOP - (parser->column % TAB_STOP);
-
-	parser->first_nonspace = parser->offset;
-	parser->first_nonspace_column = parser->column;
-	while ((c = peek_at(input, parser->first_nonspace))) {
-		if (c == ' ') {
-			parser->first_nonspace += 1;
-			parser->first_nonspace_column += 1;
-			chars_to_tab = chars_to_tab - 1;
-			if (chars_to_tab == 0) {
-				chars_to_tab = TAB_STOP;
-			}
-		} else if (c == '\t') {
-			parser->first_nonspace += 1;
-			parser->first_nonspace_column += chars_to_tab;
-			chars_to_tab = TAB_STOP;
-		} else {
-			break;
-		}
-	}
-
-	parser->indent = parser->first_nonspace_column - parser->column;
-	parser->blank = S_is_line_end_char(peek_at(input, parser->first_nonspace));
+static void S_find_first_nonspace(cmark_parser *parser, cmark_chunk *input) {
+  char c;
+  int chars_to_tab = TAB_STOP - (parser->column % TAB_STOP);
+
+  parser->first_nonspace = parser->offset;
+  parser->first_nonspace_column = parser->column;
+  while ((c = peek_at(input, parser->first_nonspace))) {
+    if (c == ' ') {
+      parser->first_nonspace += 1;
+      parser->first_nonspace_column += 1;
+      chars_to_tab = chars_to_tab - 1;
+      if (chars_to_tab == 0) {
+        chars_to_tab = TAB_STOP;
+      }
+    } else if (c == '\t') {
+      parser->first_nonspace += 1;
+      parser->first_nonspace_column += chars_to_tab;
+      chars_to_tab = TAB_STOP;
+    } else {
+      break;
+    }
+  }
+
+  parser->indent = parser->first_nonspace_column - parser->column;
+  parser->blank = S_is_line_end_char(peek_at(input, parser->first_nonspace));
 }
 
-static void
-S_advance_offset(cmark_parser *parser, cmark_chunk *input, bufsize_t count, bool columns)
-{
-	char c;
-	int chars_to_tab;
-	while (count > 0 && (c = peek_at(input, parser->offset))) {
-		if (c == '\t') {
-			chars_to_tab = 4 - (parser->column % TAB_STOP);
-			parser->column += chars_to_tab;
-			parser->offset += 1;
-			count -= (columns ? chars_to_tab : 1);
-		} else {
-			parser->offset += 1;
-			parser->column += 1; // assume ascii; block starts are ascii
-			count -= 1;
-		}
-	}
+static void S_advance_offset(cmark_parser *parser, cmark_chunk *input,
+                             bufsize_t count, bool columns) {
+  char c;
+  int chars_to_tab;
+  while (count > 0 && (c = peek_at(input, parser->offset))) {
+    if (c == '\t') {
+      chars_to_tab = 4 - (parser->column % TAB_STOP);
+      parser->column += chars_to_tab;
+      parser->offset += 1;
+      count -= (columns ? chars_to_tab : 1);
+    } else {
+      parser->offset += 1;
+      parser->column += 1; // assume ascii; block starts are ascii
+      count -= 1;
+    }
+  }
 }
 
-
-static void
-S_process_line(cmark_parser *parser, const unsigned char *buffer, bufsize_t bytes)
-{
-	cmark_node* last_matched_container;
-	bufsize_t matched = 0;
-	int lev = 0;
-	int i;
-	cmark_list *data = NULL;
-	bool all_matched = true;
-	cmark_node* container;
-	bool indented;
-	cmark_chunk input;
-	bool maybe_lazy;
-
-	if (parser->options & CMARK_OPT_VALIDATE_UTF8) {
-		utf8proc_check(parser->curline, buffer, bytes);
-	} else {
-		cmark_strbuf_put(parser->curline, buffer, bytes);
-	}
-	parser->offset = 0;
-	parser->column = 0;
-	parser->blank = false;
-
-	input.data = parser->curline->ptr;
-	input.len = parser->curline->size;
-
-	// container starts at the document root.
-	container = parser->root;
-
-	parser->line_number++;
-
-	// for each containing node, try to parse the associated line start.
-	// bail out on failure:  container will point to the last matching node.
-
-	while (container->last_child && container->last_child->open) {
-		container = container->last_child;
-
-		S_find_first_nonspace(parser, &input);
-
-		if (container->type == NODE_BLOCK_QUOTE) {
-			matched = parser->indent <= 3 && peek_at(&input, parser->first_nonspace) == '>';
-			if (matched) {
-				S_advance_offset(parser, &input, parser->indent + 1, true);
-				if (peek_at(&input, parser->offset) == ' ')
-					parser->offset++;
-			} else {
-				all_matched = false;
-			}
-
-		} else if (container->type == NODE_ITEM) {
-			if (parser->indent >= container->as.list.marker_offset +
-			    container->as.list.padding) {
-				S_advance_offset(parser, &input,
-				                 container->as.list.marker_offset +
-				                 container->as.list.padding, true);
-			} else if (parser->blank) {
-				S_advance_offset(parser, &input,
-				                 parser->first_nonspace - parser->offset, false);
-			} else {
-				all_matched = false;
-			}
-
-		} else if (container->type == NODE_CODE_BLOCK) {
-
-			if (!container->as.code.fenced) { // indented
-				if (parser->indent >= CODE_INDENT) {
-					S_advance_offset(parser, &input, CODE_INDENT, true);
-				} else if (parser->blank) {
-					S_advance_offset(parser, &input,
-					                 parser->first_nonspace - parser->offset,
-					                 false);
-				} else {
-					all_matched = false;
-				}
-			} else { // fenced
-				matched = 0;
-				if (parser->indent <= 3 &&
-				    (peek_at(&input, parser->first_nonspace) ==
-				     container->as.code.fence_char)) {
-					matched = scan_close_code_fence(&input,
-					                                parser->first_nonspace);
-				}
-				if (matched >= container->as.code.fence_length) {
-					// closing fence - and since we're at
-					// the end of a line, we can return:
-					all_matched = false;
-					S_advance_offset(parser, &input, matched, false);
-					parser->current = finalize(parser, container);
-					goto finished;
-				} else {
-					// skip opt. spaces of fence parser->offset
-					i = container->as.code.fence_offset;
-					while (i > 0 &&
-					       peek_at(&input, parser->offset) == ' ') {
-						S_advance_offset(parser, &input, 1, false);
-						i--;
-					}
-				}
-			}
-		} else if (container->type == NODE_HEADER) {
-
-			// a header can never contain more than one line
-			all_matched = false;
-
-		} else if (container->type == NODE_HTML) {
-
-			switch (container->as.html_block_type) {
-			case 1:
-			case 2:
-			case 3:
-			case 4:
-			case 5:
-				// these types of blocks can accept blanks
-				break;
-			case 6:
-			case 7:
-				if (parser->blank) {
-					all_matched = false;
-				}
-				break;
-			default:
-				fprintf(stderr,
-				        "Error (%s:%d): Unknown HTML block type %d\n",
-				        __FILE__, __LINE__,
-				        container->as.html_block_type);
-				exit(1);
-			}
-
-		} else if (container->type == NODE_PARAGRAPH) {
-
-			if (parser->blank) {
-				all_matched = false;
-			}
-
-		}
-
-		if (!all_matched) {
-			container = container->parent;  // back up to last matching node
-			break;
-		}
-	}
-
-	last_matched_container = container;
-
-	// check to see if we've hit 2nd blank line, break out of list:
-	if (parser->blank && container->last_line_blank) {
-		break_out_of_lists(parser, &container);
-	}
-
-	maybe_lazy = parser->current->type == NODE_PARAGRAPH;
-	// try new container starts:
-	while (container->type != NODE_CODE_BLOCK &&
-	       container->type != NODE_HTML) {
-
-		S_find_first_nonspace(parser, &input);
-		indented = parser->indent >= CODE_INDENT;
-
-		if (!indented && peek_at(&input, parser->first_nonspace) == '>') {
-
-			S_advance_offset(parser, &input, parser->first_nonspace + 1 - parser->offset, false);
-			// optional following character
-			if (peek_at(&input, parser->offset) == ' ')
-				S_advance_offset(parser, &input, 1, false);
-			container = add_child(parser, container, NODE_BLOCK_QUOTE, parser->offset + 1);
-
-		} else if (!indented && (matched = scan_atx_header_start(&input, parser->first_nonspace))) {
-
-			S_advance_offset(parser, &input,
-			                 parser->first_nonspace + matched - parser->offset, false);
-			container = add_child(parser, container, NODE_HEADER, parser->offset + 1);
-
-			bufsize_t hashpos = cmark_chunk_strchr(&input, '#', parser->first_nonspace);
-			int level = 0;
-
-			while (peek_at(&input, hashpos) == '#') {
-				level++;
-				hashpos++;
-			}
-			container->as.header.level = level;
-			container->as.header.setext = false;
-
-		} else if (!indented && (matched = scan_open_code_fence(&input, parser->first_nonspace))) {
-
-			container = add_child(parser, container, NODE_CODE_BLOCK, parser->first_nonspace + 1);
-			container->as.code.fenced = true;
-			container->as.code.fence_char = peek_at(&input, parser->first_nonspace);
-			container->as.code.fence_length = matched;
-			container->as.code.fence_offset = parser->first_nonspace - parser->offset;
-			container->as.code.info = cmark_chunk_literal("");
-			S_advance_offset(parser, &input, parser->first_nonspace + matched - parser->offset, false);
-
-		} else if (!indented &&
-		           ((matched = scan_html_block_start(&input, parser->first_nonspace)) ||
-		            (container->type != NODE_PARAGRAPH &&
-		             (matched = scan_html_block_start_7(&input, parser->first_nonspace))))) {
-
-			container = add_child(parser, container, NODE_HTML, parser->first_nonspace + 1);
-			container->as.html_block_type = matched;
-			// note, we don't adjust parser->offset because the tag is part of the text
-
-		} else if (!indented &&
-		           container->type == NODE_PARAGRAPH &&
-		           (lev = scan_setext_header_line(&input, parser->first_nonspace)) &&
-		           // check that there is only one line in the paragraph:
-		           (cmark_strbuf_strrchr(&container->string_content, '\n',
-		                                 cmark_strbuf_len(&container->string_content) - 2) < 0)) {
-
-			container->type = NODE_HEADER;
-			container->as.header.level = lev;
-			container->as.header.setext = true;
-			S_advance_offset(parser, &input, input.len - 1 - parser->offset, false);
-
-		} else if (!indented &&
-		           !(container->type == NODE_PARAGRAPH &&
-		             !all_matched) &&
-		           (matched = scan_hrule(&input, parser->first_nonspace))) {
-
-			// it's only now that we know the line is not part of a setext header:
-			container = add_child(parser, container, NODE_HRULE, parser->first_nonspace + 1);
-			container = finalize(parser, container);
-			S_advance_offset(parser, &input, input.len - 1 - parser->offset, false);
-
-		} else if ((matched = parse_list_marker(&input, parser->first_nonspace, &data)) &&
-		           (!indented || container->type == NODE_LIST)) {
-			// Note that we can have new list items starting with >= 4
-			// spaces indent, as long as the list container is still open.
-
-			// compute padding:
-			S_advance_offset(parser, &input, parser->first_nonspace + matched - parser->offset, false);
-			i = 0;
-			while (i <= 5 && peek_at(&input, parser->offset + i) == ' ') {
-				i++;
-			}
-			// i = number of spaces after marker, up to 5
-			if (i >= 5 || i < 1 ||
-			    S_is_line_end_char(peek_at(&input, parser->offset))) {
-				data->padding = matched + 1;
-				if (i > 0) {
-					S_advance_offset(parser, &input, 1, false);
-				}
-			} else {
-				data->padding = matched + i;
-				S_advance_offset(parser, &input, i, true);
-			}
-
-			// check container; if it's a list, see if this list item
-			// can continue the list; otherwise, create a list container.
-
-			data->marker_offset = parser->indent;
-
-			if (container->type != NODE_LIST ||
-			    !lists_match(&container->as.list, data)) {
-				container = add_child(parser, container, NODE_LIST,
-				                      parser->first_nonspace + 1);
-
-				memcpy(&container->as.list, data, sizeof(*data));
-			}
-
-			// add the list item
-			container = add_child(parser, container, NODE_ITEM,
-			                      parser->first_nonspace + 1);
-			/* TODO: static */
-			memcpy(&container->as.list, data, sizeof(*data));
-			free(data);
-
-		} else if (indented && !maybe_lazy && !parser->blank) {
-			S_advance_offset(parser, &input, CODE_INDENT, true);
-			container = add_child(parser, container, NODE_CODE_BLOCK, parser->offset + 1);
-			container->as.code.fenced = false;
-			container->as.code.fence_char = 0;
-			container->as.code.fence_length = 0;
-			container->as.code.fence_offset = 0;
-			container->as.code.info = cmark_chunk_literal("");
-
-		} else {
-			break;
-		}
-
-		if (accepts_lines(container->type)) {
-			// if it's a line container, it can't contain other containers
-			break;
-		}
-		maybe_lazy = false;
-	}
-
-	// what remains at parser->offset is a text line.  add the text to the
-	// appropriate container.
-
-	S_find_first_nonspace(parser, &input);
-
-	if (parser->blank && container->last_child) {
-		container->last_child->last_line_blank = true;
-	}
-
-	// block quote lines are never blank as they start with >
-	// and we don't count blanks in fenced code for purposes of tight/loose
-	// lists or breaking out of lists.  we also don't set last_line_blank
-	// on an empty list item.
-	container->last_line_blank = (parser->blank &&
-	                              container->type != NODE_BLOCK_QUOTE &&
-	                              container->type != NODE_HEADER &&
-	                              !(container->type == NODE_CODE_BLOCK &&
-	                                container->as.code.fenced) &&
-	                              !(container->type == NODE_ITEM &&
-	                                container->first_child == NULL &&
-	                                container->start_line == parser->line_number));
-
-	cmark_node *cont = container;
-	while (cont->parent) {
-		cont->parent->last_line_blank = false;
-		cont = cont->parent;
-	}
-
-	if (parser->current != last_matched_container &&
-	    container == last_matched_container &&
-	    !parser->blank &&
-	    parser->current->type == NODE_PARAGRAPH &&
-	    cmark_strbuf_len(&parser->current->string_content) > 0) {
-
-		add_line(parser->current, &input, parser->offset);
-
-	} else { // not a lazy continuation
-
-		// finalize any blocks that were not matched and set cur to container:
-		while (parser->current != last_matched_container) {
-			parser->current = finalize(parser, parser->current);
-			assert(parser->current != NULL);
-		}
-
-		if (container->type == NODE_CODE_BLOCK) {
-
-			add_line(container, &input, parser->offset);
-
-		} else if (container->type == NODE_HTML) {
-
-			add_line(container, &input, parser->offset);
-
-			int matches_end_condition;
-			switch (container->as.html_block_type) {
-			case 1:
-				// </script>, </style>, </pre>
-				matches_end_condition =
-				    scan_html_block_end_1(&input, parser->first_nonspace);
-				break;
-			case 2:
-				// -->
-				matches_end_condition =
-				    scan_html_block_end_2(&input, parser->first_nonspace);
-				break;
-			case 3:
-				// ?>
-				matches_end_condition =
-				    scan_html_block_end_3(&input, parser->first_nonspace);
-				break;
-			case 4:
-				// >
-				matches_end_condition =
-				    scan_html_block_end_4(&input, parser->first_nonspace);
-				break;
-			case 5:
-				// ]]>
-				matches_end_condition =
-				    scan_html_block_end_5(&input, parser->first_nonspace);
-				break;
-			default:
-				matches_end_condition = 0;
-				break;
-			}
-
-			if (matches_end_condition) {
-				container = finalize(parser, container);
-				assert(parser->current != NULL);
-			}
-
-		} else if (parser->blank) {
-
-			// ??? do nothing
-
-		} else if (accepts_lines(container->type)) {
-
-			if (container->type == NODE_HEADER &&
-			    container->as.header.setext == false) {
-				chop_trailing_hashtags(&input);
-			}
-			add_line(container, &input, parser->first_nonspace);
-
-		} else {
-			// create paragraph container for line
-			container = add_child(parser, container, NODE_PARAGRAPH, parser->first_nonspace + 1);
-			add_line(container, &input, parser->first_nonspace);
-
-		}
-
-		parser->current = container;
-	}
+static void S_process_line(cmark_parser *parser, const unsigned char *buffer,
+                           bufsize_t bytes) {
+  cmark_node *last_matched_container;
+  bufsize_t matched = 0;
+  int lev = 0;
+  int i;
+  cmark_list *data = NULL;
+  bool all_matched = true;
+  cmark_node *container;
+  bool indented;
+  cmark_chunk input;
+  bool maybe_lazy;
+
+  if (parser->options & CMARK_OPT_VALIDATE_UTF8) {
+    utf8proc_check(parser->curline, buffer, bytes);
+  } else {
+    cmark_strbuf_put(parser->curline, buffer, bytes);
+  }
+  parser->offset = 0;
+  parser->column = 0;
+  parser->blank = false;
+
+  input.data = parser->curline->ptr;
+  input.len = parser->curline->size;
+
+  // container starts at the document root.
+  container = parser->root;
+
+  parser->line_number++;
+
+  // for each containing node, try to parse the associated line start.
+  // bail out on failure:  container will point to the last matching node.
+
+  while (container->last_child && container->last_child->open) {
+    container = container->last_child;
+
+    S_find_first_nonspace(parser, &input);
+
+    if (container->type == NODE_BLOCK_QUOTE) {
+      matched =
+          parser->indent <= 3 && peek_at(&input, parser->first_nonspace) == '>';
+      if (matched) {
+        S_advance_offset(parser, &input, parser->indent + 1, true);
+        if (peek_at(&input, parser->offset) == ' ')
+          parser->offset++;
+      } else {
+        all_matched = false;
+      }
+
+    } else if (container->type == NODE_ITEM) {
+      if (parser->indent >=
+          container->as.list.marker_offset + container->as.list.padding) {
+        S_advance_offset(parser, &input, container->as.list.marker_offset +
+                                             container->as.list.padding,
+                         true);
+      } else if (parser->blank) {
+        S_advance_offset(parser, &input,
+                         parser->first_nonspace - parser->offset, false);
+      } else {
+        all_matched = false;
+      }
+
+    } else if (container->type == NODE_CODE_BLOCK) {
+
+      if (!container->as.code.fenced) { // indented
+        if (parser->indent >= CODE_INDENT) {
+          S_advance_offset(parser, &input, CODE_INDENT, true);
+        } else if (parser->blank) {
+          S_advance_offset(parser, &input,
+                           parser->first_nonspace - parser->offset, false);
+        } else {
+          all_matched = false;
+        }
+      } else { // fenced
+        matched = 0;
+        if (parser->indent <= 3 && (peek_at(&input, parser->first_nonspace) ==
+                                    container->as.code.fence_char)) {
+          matched = scan_close_code_fence(&input, parser->first_nonspace);
+        }
+        if (matched >= container->as.code.fence_length) {
+          // closing fence - and since we're at
+          // the end of a line, we can return:
+          all_matched = false;
+          S_advance_offset(parser, &input, matched, false);
+          parser->current = finalize(parser, container);
+          goto finished;
+        } else {
+          // skip opt. spaces of fence parser->offset
+          i = container->as.code.fence_offset;
+          while (i > 0 && peek_at(&input, parser->offset) == ' ') {
+            S_advance_offset(parser, &input, 1, false);
+            i--;
+          }
+        }
+      }
+    } else if (container->type == NODE_HEADER) {
+
+      // a header can never contain more than one line
+      all_matched = false;
+
+    } else if (container->type == NODE_HTML) {
+
+      switch (container->as.html_block_type) {
+      case 1:
+      case 2:
+      case 3:
+      case 4:
+      case 5:
+        // these types of blocks can accept blanks
+        break;
+      case 6:
+      case 7:
+        if (parser->blank) {
+          all_matched = false;
+        }
+        break;
+      default:
+        fprintf(stderr, "Error (%s:%d): Unknown HTML block type %d\n", __FILE__,
+                __LINE__, container->as.html_block_type);
+        exit(1);
+      }
+
+    } else if (container->type == NODE_PARAGRAPH) {
+
+      if (parser->blank) {
+        all_matched = false;
+      }
+    }
+
+    if (!all_matched) {
+      container = container->parent; // back up to last matching node
+      break;
+    }
+  }
+
+  last_matched_container = container;
+
+  // check to see if we've hit 2nd blank line, break out of list:
+  if (parser->blank && container->last_line_blank) {
+    break_out_of_lists(parser, &container);
+  }
+
+  maybe_lazy = parser->current->type == NODE_PARAGRAPH;
+  // try new container starts:
+  while (container->type != NODE_CODE_BLOCK && container->type != NODE_HTML) {
+
+    S_find_first_nonspace(parser, &input);
+    indented = parser->indent >= CODE_INDENT;
+
+    if (!indented && peek_at(&input, parser->first_nonspace) == '>') {
+
+      S_advance_offset(parser, &input,
+                       parser->first_nonspace + 1 - parser->offset, false);
+      // optional following character
+      if (peek_at(&input, parser->offset) == ' ')
+        S_advance_offset(parser, &input, 1, false);
+      container =
+          add_child(parser, container, NODE_BLOCK_QUOTE, parser->offset + 1);
+
+    } else if (!indented && (matched = scan_atx_header_start(
+                                 &input, parser->first_nonspace))) {
+
+      S_advance_offset(parser, &input,
+                       parser->first_nonspace + matched - parser->offset,
+                       false);
+      container = add_child(parser, container, NODE_HEADER, parser->offset + 1);
+
+      bufsize_t hashpos =
+          cmark_chunk_strchr(&input, '#', parser->first_nonspace);
+      int level = 0;
+
+      while (peek_at(&input, hashpos) == '#') {
+        level++;
+        hashpos++;
+      }
+      container->as.header.level = level;
+      container->as.header.setext = false;
+
+    } else if (!indented && (matched = scan_open_code_fence(
+                                 &input, parser->first_nonspace))) {
+
+      container = add_child(parser, container, NODE_CODE_BLOCK,
+                            parser->first_nonspace + 1);
+      container->as.code.fenced = true;
+      container->as.code.fence_char = peek_at(&input, parser->first_nonspace);
+      container->as.code.fence_length = matched;
+      container->as.code.fence_offset = parser->first_nonspace - parser->offset;
+      container->as.code.info = cmark_chunk_literal("");
+      S_advance_offset(parser, &input,
+                       parser->first_nonspace + matched - parser->offset,
+                       false);
+
+    } else if (!indented && ((matched = scan_html_block_start(
+                                  &input, parser->first_nonspace)) ||
+                             (container->type != NODE_PARAGRAPH &&
+                              (matched = scan_html_block_start_7(
+                                   &input, parser->first_nonspace))))) {
+
+      container =
+          add_child(parser, container, NODE_HTML, parser->first_nonspace + 1);
+      container->as.html_block_type = matched;
+      // note, we don't adjust parser->offset because the tag is part of the
+      // text
+
+    } else if (!indented && container->type == NODE_PARAGRAPH &&
+               (lev =
+                    scan_setext_header_line(&input, parser->first_nonspace)) &&
+               // check that there is only one line in the paragraph:
+               (cmark_strbuf_strrchr(
+                    &container->string_content, '\n',
+                    cmark_strbuf_len(&container->string_content) - 2) < 0)) {
+
+      container->type = NODE_HEADER;
+      container->as.header.level = lev;
+      container->as.header.setext = true;
+      S_advance_offset(parser, &input, input.len - 1 - parser->offset, false);
+
+    } else if (!indented &&
+               !(container->type == NODE_PARAGRAPH && !all_matched) &&
+               (matched = scan_hrule(&input, parser->first_nonspace))) {
+
+      // it's only now that we know the line is not part of a setext header:
+      container =
+          add_child(parser, container, NODE_HRULE, parser->first_nonspace + 1);
+      container = finalize(parser, container);
+      S_advance_offset(parser, &input, input.len - 1 - parser->offset, false);
+
+    } else if ((matched =
+                    parse_list_marker(&input, parser->first_nonspace, &data)) &&
+               (!indented || container->type == NODE_LIST)) {
+      // Note that we can have new list items starting with >= 4
+      // spaces indent, as long as the list container is still open.
+
+      // compute padding:
+      S_advance_offset(parser, &input,
+                       parser->first_nonspace + matched - parser->offset,
+                       false);
+      i = 0;
+      while (i <= 5 && peek_at(&input, parser->offset + i) == ' ') {
+        i++;
+      }
+      // i = number of spaces after marker, up to 5
+      if (i >= 5 || i < 1 ||
+          S_is_line_end_char(peek_at(&input, parser->offset))) {
+        data->padding = matched + 1;
+        if (i > 0) {
+          S_advance_offset(parser, &input, 1, false);
+        }
+      } else {
+        data->padding = matched + i;
+        S_advance_offset(parser, &input, i, true);
+      }
+
+      // check container; if it's a list, see if this list item
+      // can continue the list; otherwise, create a list container.
+
+      data->marker_offset = parser->indent;
+
+      if (container->type != NODE_LIST ||
+          !lists_match(&container->as.list, data)) {
+        container =
+            add_child(parser, container, NODE_LIST, parser->first_nonspace + 1);
+
+        memcpy(&container->as.list, data, sizeof(*data));
+      }
+
+      // add the list item
+      container =
+          add_child(parser, container, NODE_ITEM, parser->first_nonspace + 1);
+      /* TODO: static */
+      memcpy(&container->as.list, data, sizeof(*data));
+      free(data);
+
+    } else if (indented && !maybe_lazy && !parser->blank) {
+      S_advance_offset(parser, &input, CODE_INDENT, true);
+      container =
+          add_child(parser, container, NODE_CODE_BLOCK, parser->offset + 1);
+      container->as.code.fenced = false;
+      container->as.code.fence_char = 0;
+      container->as.code.fence_length = 0;
+      container->as.code.fence_offset = 0;
+      container->as.code.info = cmark_chunk_literal("");
+
+    } else {
+      break;
+    }
+
+    if (accepts_lines(container->type)) {
+      // if it's a line container, it can't contain other containers
+      break;
+    }
+    maybe_lazy = false;
+  }
+
+  // what remains at parser->offset is a text line.  add the text to the
+  // appropriate container.
+
+  S_find_first_nonspace(parser, &input);
+
+  if (parser->blank && container->last_child) {
+    container->last_child->last_line_blank = true;
+  }
+
+  // block quote lines are never blank as they start with >
+  // and we don't count blanks in fenced code for purposes of tight/loose
+  // lists or breaking out of lists.  we also don't set last_line_blank
+  // on an empty list item.
+  container->last_line_blank =
+      (parser->blank && container->type != NODE_BLOCK_QUOTE &&
+       container->type != NODE_HEADER &&
+       !(container->type == NODE_CODE_BLOCK && container->as.code.fenced) &&
+       !(container->type == NODE_ITEM && container->first_child == NULL &&
+         container->start_line == parser->line_number));
+
+  cmark_node *cont = container;
+  while (cont->parent) {
+    cont->parent->last_line_blank = false;
+    cont = cont->parent;
+  }
+
+  if (parser->current != last_matched_container &&
+      container == last_matched_container && !parser->blank &&
+      parser->current->type == NODE_PARAGRAPH &&
+      cmark_strbuf_len(&parser->current->string_content) > 0) {
+
+    add_line(parser->current, &input, parser->offset);
+
+  } else { // not a lazy continuation
+
+    // finalize any blocks that were not matched and set cur to container:
+    while (parser->current != last_matched_container) {
+      parser->current = finalize(parser, parser->current);
+      assert(parser->current != NULL);
+    }
+
+    if (container->type == NODE_CODE_BLOCK) {
+
+      add_line(container, &input, parser->offset);
+
+    } else if (container->type == NODE_HTML) {
+
+      add_line(container, &input, parser->offset);
+
+      int matches_end_condition;
+      switch (container->as.html_block_type) {
+      case 1:
+        // </script>, </style>, </pre>
+        matches_end_condition =
+            scan_html_block_end_1(&input, parser->first_nonspace);
+        break;
+      case 2:
+        // -->
+        matches_end_condition =
+            scan_html_block_end_2(&input, parser->first_nonspace);
+        break;
+      case 3:
+        // ?>
+        matches_end_condition =
+            scan_html_block_end_3(&input, parser->first_nonspace);
+        break;
+      case 4:
+        // >
+        matches_end_condition =
+            scan_html_block_end_4(&input, parser->first_nonspace);
+        break;
+      case 5:
+        // ]]>
+        matches_end_condition =
+            scan_html_block_end_5(&input, parser->first_nonspace);
+        break;
+      default:
+        matches_end_condition = 0;
+        break;
+      }
+
+      if (matches_end_condition) {
+        container = finalize(parser, container);
+        assert(parser->current != NULL);
+      }
+
+    } else if (parser->blank) {
+
+      // ??? do nothing
+
+    } else if (accepts_lines(container->type)) {
+
+      if (container->type == NODE_HEADER &&
+          container->as.header.setext == false) {
+        chop_trailing_hashtags(&input);
+      }
+      add_line(container, &input, parser->first_nonspace);
+
+    } else {
+      // create paragraph container for line
+      container = add_child(parser, container, NODE_PARAGRAPH,
+                            parser->first_nonspace + 1);
+      add_line(container, &input, parser->first_nonspace);
+    }
+
+    parser->current = container;
+  }
 finished:
-	parser->last_line_length = parser->curline->size;
-	if (parser->last_line_length &&
-	    parser->curline->ptr[parser->last_line_length - 1] == '\n')
-		parser->last_line_length -= 1;
-	if (parser->last_line_length &&
-	    parser->curline->ptr[parser->last_line_length - 1] == '\r')
-		parser->last_line_length -= 1;
-
-	cmark_strbuf_clear(parser->curline);
-
+  parser->last_line_length = parser->curline->size;
+  if (parser->last_line_length &&
+      parser->curline->ptr[parser->last_line_length - 1] == '\n')
+    parser->last_line_length -= 1;
+  if (parser->last_line_length &&
+      parser->curline->ptr[parser->last_line_length - 1] == '\r')
+    parser->last_line_length -= 1;
+
+  cmark_strbuf_clear(parser->curline);
 }
 
-cmark_node *cmark_parser_finish(cmark_parser *parser)
-{
-	if (parser->linebuf->size) {
-		S_process_line(parser, parser->linebuf->ptr,
-		               parser->linebuf->size);
-		cmark_strbuf_clear(parser->linebuf);
-	}
+cmark_node *cmark_parser_finish(cmark_parser *parser) {
+  if (parser->linebuf->size) {
+    S_process_line(parser, parser->linebuf->ptr, parser->linebuf->size);
+    cmark_strbuf_clear(parser->linebuf);
+  }
 
-	finalize_document(parser);
+  finalize_document(parser);
 
-	if (parser->options & CMARK_OPT_NORMALIZE) {
-		cmark_consolidate_text_nodes(parser->root);
-	}
+  if (parser->options & CMARK_OPT_NORMALIZE) {
+    cmark_consolidate_text_nodes(parser->root);
+  }
 
-	cmark_strbuf_free(parser->curline);
+  cmark_strbuf_free(parser->curline);
 
 #if CMARK_DEBUG_NODES
-	if (cmark_node_check(parser->root, stderr)) {
-		abort();
-	}
+  if (cmark_node_check(parser->root, stderr)) {
+    abort();
+  }
 #endif
-	return parser->root;
+  return parser->root;
 }