Fossil

static void html_epilog(struct Blob *ob, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "</div>\n");
}

static void html_raw_block(struct Blob *ob, struct Blob *text, void *opaque){
  char *data = blob_buffer(text);
  size_t size = blob_size(text);
  Blob *title = (Blob*)opaque;
  while( size>0 && fossil_isspace(data[0]) ){ data++; size--; }
  while( size>0 && fossil_isspace(data[size-1]) ){ size--; }
  /* If the first raw block is an <h1> element, then use it as the title. */
  if( blob_size(ob)<=PROLOG_SIZE
   && size>9
   && title!=0
   && sqlite3_strnicmp("<h1",data,3)==0
   && sqlite3_strnicmp("</h1>", &data[size-5],5)==0
  ){
    int nTag = htmlTagLength(data);
    blob_append(title, data+nTag, size - nTag - 5);
    return;
  }
  INTER_BLOCK(ob);


  blob_append(ob, data, size);
  BLOB_APPEND_LITERAL(ob, "\n");
}

static void html_blockcode(struct Blob *ob, struct Blob *text, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<pre><code>");
  html_escape(ob, blob_buffer(text), blob_size(text));

  struct Blob *text,
  int level,
  void *opaque
){
  struct Blob *title = opaque;
  /* The first header at the beginning of a text is considered as
   * a title and not output. */
  if( blob_size(ob)<=PROLOG_SIZE && title!=0 && blob_size(title)==0 ){
    BLOB_APPEND_BLOB(title, text);
    return;
  }
  INTER_BLOCK(ob);
  blob_appendf(ob, "<h%d>", level);
  BLOB_APPEND_BLOB(ob, text);
  blob_appendf(ob, "</h%d>", level);
}

}



/* HTML span tags */

static int html_raw_span(struct Blob *ob, struct Blob *text, void *opaque){
  /* If the document begins with a <h1> markup, take that as the header. */
  BLOB_APPEND_BLOB(ob, text);
  return 1;
}

static int html_autolink(
  struct Blob *ob,
  struct Blob *link,

}


static void html_normal_text(struct Blob *ob, struct Blob *text, void *opaque){
  html_escape(ob, blob_buffer(text), blob_size(text));
}

/*
** Convert markdown into HTML.
**
** The document title is placed in output_title if not NULL.  Or if
** output_title is NULL, the document title appears in the body.
*/
void markdown_to_html(
  struct Blob *input_markdown,   /* Markdown content to be rendered */
  struct Blob *output_title,     /* Put title here.  May be NULL */
  struct Blob *output_body       /* Put document body here. */
){
  struct mkd_renderer html_renderer = {
    /* prolog and epilog */
    html_prolog,
    html_epilog,

    /* block level elements */

    /* misc. parameters */
    64, /* maximum stack */
    "*_", /* emphasis characters */
    0 /* opaque data */
  };
  html_renderer.opaque = output_title;
  if( output_title ) blob_reset(output_title);
  blob_reset(output_body);
  markdown(output_body, input_markdown, &html_renderer);
}