219 lines
7.1 KiB
C
219 lines
7.1 KiB
C
/* markdown: a C implementation of John Gruber's Markdown markup language.
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*
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* Copyright (C) 2007-2011 Jessica L Parsons.
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* The redistribution terms are provided in the COPYRIGHT file that must
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* be distributed with this source code.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <errno.h>
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#include <string.h>
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#include <stdarg.h>
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#include "config.h"
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#include "markdown.h"
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#include "amalloc.h"
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#if HAVE_LIBGEN_H
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#include <libgen.h>
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#endif
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static void set_dlist(mkd_flag_t *flags, int enable);
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static struct _special {
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char *name;
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void (*setter)(mkd_flag_t *, int);
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} special[] = {
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{ "definitionlist", set_dlist },
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{ "dlist", set_dlist },
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};
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static struct _opt {
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char *name;
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char *desc;
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int special;
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int off;
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int alias; /* this opt is a synonym; don't display in -F? */
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int sayenable;
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int flag; /* flag to set/clear */
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int unflag; /* flag to clear/set */
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} opts[] = {
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{ "tabstop", "default (4-space) tabstops", 0, 0, 0, 1, MKD_TABSTOP },
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{ "image", "images", 0, 1, 0, 1, MKD_NOIMAGE },
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{ "links", "links", 0, 1, 0, 1, MKD_NOLINKS },
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{ "strict", "conform to the markdown standard", 0, 0, 0, 1, MKD_STRICT },
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{ "relax", "(don't) conform to the markdown standard", 0, 1, 1, 1, MKD_STRICT },
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{ "standard", "conform to the markdown standard", 0, 0, 1, 1, MKD_STRICT },
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{ "tables", "tables", 0, 1, 0, 1, MKD_NOTABLES },
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{ "header", "pandoc-style headers", 0, 1, 0, 1, MKD_NOHEADER },
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{ "html", "allow raw html", 0, 1, 0, 0, MKD_NOHTML },
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{ "ext", "extended protocols", 0, 1, 0, 1, MKD_NO_EXT },
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{ "cdata", "generate cdata", 0, 0, 0, 0, MKD_CDATA },
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{ "smarty", "smartypants", 0, 1, 0, 1, MKD_NOPANTS },
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{ "pants", "smartypants", 0, 1, 1, 1, MKD_NOPANTS },
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{ "toc", "tables of contents", 0, 0, 0, 1, MKD_TOC },
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{ "autolink", "autolinking", 0, 0, 0, 1, MKD_AUTOLINK },
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{ "safelink", "safe links", 0, 0, 0, 1, MKD_SAFELINK },
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{ "strikethrough", "strikethrough", 0, 1, 0, 1, MKD_NOSTRIKETHROUGH },
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{ "del", "strikethrough", 0, 1, 1, 1, MKD_NOSTRIKETHROUGH },
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{ "superscript", "superscript", 0, 1, 0, 1, MKD_NOSUPERSCRIPT },
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{ "divquote", ">%class% blockquotes", 0, 1, 0, 1, MKD_NODIVQUOTE },
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{ "alphalist", "alpha lists", 0, 1, 0, 1, MKD_NOALPHALIST },
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{ "1.0", "markdown 1.0 compatibility", 0, 0, 0, 1, MKD_1_COMPAT },
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{ "footnotes", "markdown extra footnotes", 0, 0, 0, 1, MKD_EXTRA_FOOTNOTE },
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{ "footnote", "markdown extra footnotes", 0, 0, 1, 1, MKD_EXTRA_FOOTNOTE },
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{ "style", "extract style blocks", 0, 1, 0, 1, MKD_NOSTYLE },
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{ "dldiscount", "discount-style definition lists", 0, 0, 0, 1, MKD_DLDISCOUNT },
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{ "dlextra", "markdown extra-style definition lists", 0, 0, 0, 1, MKD_DLEXTRA },
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{ "fencedcode", "fenced code blocks", 0, 0, 0, 1, MKD_FENCEDCODE },
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{ "idanchor", "id= anchors in TOC", 0, 0, 0, 1, MKD_IDANCHOR },
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{ "githubtags", "- and _ in element names", 0, 0, 0, 1, MKD_GITHUBTAGS },
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{ "urlencodedanchor", "html5-style anchors", 0, 0, 0, 1, MKD_URLENCODEDANCHOR },
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{ "html5anchor", "html5-style anchors", 0, 0, 1, 1, MKD_URLENCODEDANCHOR },
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{ "latex", "LaTeX escapes", 0, 0, 0, 1, MKD_LATEX },
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{ "explicitlist", "merge adjacent numeric/bullet lists", 0, 0, 0, 0, MKD_EXPLICITLIST },
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{ "github-listitem","github-style check items", 0, 1, 0, 1, MKD_NORMAL_LISTITEM } ,
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{ "regular-listitem","github-style check items", 0, 0, 1, 1, MKD_NORMAL_LISTITEM } ,
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{ "definitionlist","both discount & markdown extra definition lists", 1 },
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{ "dlist", "both discount & markdown extra definition lists", 1, 0, 1 },
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{ "alt_as_title", "use the alt text as a title if there isn't one (images)", 0, 0, 0, 1, MKD_ALT_AS_TITLE },
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{ "extended_attr", "allow extended attributes on links", 0, 0, 1, 1, MKD_EXTENDED_ATTR },
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{ "extended_attributes", "allow extended attributes on links", 0, 0, 0, 1, MKD_EXTENDED_ATTR },
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{ "html5", "handle html5 tags (obsolete?)", 0, 0, 0, 1, MKD_HTML5 },
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} ;
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#define NR(x) (sizeof x / sizeof x[0])
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typedef int (*stfu)(const void *, const void *);
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int
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sort_by_name(struct _opt *a, struct _opt *b)
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{
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return strcmp(a->name,b->name);
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}
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int
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sort_by_flag(struct _opt *a, struct _opt *b)
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{
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return a->flag - b->flag;
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}
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void
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show_flags(int byname, int verbose, mkd_flag_t *flags)
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{
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int i;
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if ( byname ) {
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int size, len=0;
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qsort(opts, NR(opts), sizeof(opts[0]), (stfu)sort_by_name);
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for (i=0; i < NR(opts); i++)
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if ( (size=strlen(opts[i].name)) > len )
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len = size;
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for (i=0; i < NR(opts); i++) {
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if ( opts[i].alias && !verbose )
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continue;
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if ( (flags==0) || is_flag_set(flags, opts[i].flag) )
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fprintf(stderr, "%*s : %s\n", len+1, opts[i].name, opts[i].desc);
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}
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}
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else {
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qsort(opts, NR(opts), sizeof(opts[0]), (stfu)sort_by_flag);
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for (i=0; i < NR(opts) && i < 8*sizeof(DWORD); i++) {
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if ( opts[i].special || opts[i].alias )
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continue;
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if ( (flags==0) || is_flag_set(flags, opts[i].flag) ) {
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fprintf(stderr, "%08lx : ", 1L<<opts[i].flag);
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if ( opts[i].sayenable )
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fprintf(stderr, opts[i].off ? "disable " : "enable ");
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fprintf(stderr, "%s\n", opts[i].desc);
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}
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}
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}
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}
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static void
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handle_special(mkd_flag_t *flags, char *opt, int enable)
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{
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int i;
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for (i=0; i < NR(special); i++)
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if ( strcasecmp(opt, special[i].name) == 0 ) {
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(special[i].setter)(flags, enable);
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return;
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}
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}
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static void
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set_dlist(mkd_flag_t *flags, int enable)
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{
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if ( enable ) {
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set_mkd_flag(flags, MKD_DLDISCOUNT);
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set_mkd_flag(flags, MKD_DLEXTRA);
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}
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else {
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clear_mkd_flag(flags, MKD_DLDISCOUNT);
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clear_mkd_flag(flags, MKD_DLEXTRA);
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}
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}
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char *
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mkd_set_flag_string(mkd_flag_t *flags, char *optionstring)
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{
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int i;
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int enable;
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char *arg;
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if ( flags == 0 ) /* shouldn't happen */
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return "NULL";
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for ( arg = strtok(optionstring, ","); arg; arg = strtok(NULL, ",") ) {
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if ( *arg == '+' || *arg == '-' )
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enable = (*arg++ == '+') ? 1 : 0;
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else if ( strncasecmp(arg, "no", 2) == 0 ) {
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arg += 2;
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enable = 0;
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}
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else
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enable = 1;
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for ( i=0; i < NR(opts); i++ )
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if ( strcasecmp(arg, opts[i].name) == 0 )
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break;
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if ( i < NR(opts) ) {
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if ( opts[i].special ) {
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handle_special(flags, opts[i].name, enable);
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continue;
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}
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if ( opts[i].off )
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enable = !enable;
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if ( enable ) {
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set_mkd_flag(flags, opts[i].flag);
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if ( opts[i].unflag )
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clear_mkd_flag(flags, opts[i].unflag);
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}
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else {
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clear_mkd_flag(flags, opts[i].flag);
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if ( opts[i].unflag )
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set_mkd_flag(flags, opts[i].unflag);
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}
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}
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else
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return arg;
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}
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return 0;
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}
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