You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
357 lines
6.6 KiB
357 lines
6.6 KiB
/*
|
|
* mkdio -- markdown front end input functions
|
|
*
|
|
* Copyright (C) 2007 David L Parsons.
|
|
* The redistribution terms are provided in the COPYRIGHT file that must
|
|
* be distributed with this source code.
|
|
*/
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
|
|
#include "cstring.h"
|
|
#include "markdown.h"
|
|
#include "amalloc.h"
|
|
|
|
typedef ANCHOR(Line) LineAnchor;
|
|
|
|
/* create a new blank Document
|
|
*/
|
|
static Document*
|
|
new_Document()
|
|
{
|
|
Document *ret = calloc(sizeof(Document), 1);
|
|
|
|
if ( ret ) {
|
|
if (( ret->ctx = calloc(sizeof(MMIOT), 1) )) {
|
|
ret->magic = VALID_DOCUMENT;
|
|
return ret;
|
|
}
|
|
free(ret);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* add a line to the markdown input chain, expanding tabs and
|
|
* noting the presence of special characters as we go.
|
|
*/
|
|
static void
|
|
queue(Document* a, Cstring *line)
|
|
{
|
|
Line *p = calloc(sizeof *p, 1);
|
|
unsigned char c;
|
|
int xp = 0;
|
|
int size = S(*line);
|
|
unsigned char *str = (unsigned char*)T(*line);
|
|
|
|
CREATE(p->text);
|
|
ATTACH(a->content, p);
|
|
|
|
while ( size-- ) {
|
|
if ( (c = *str++) == '\t' ) {
|
|
/* expand tabs into ->tabstop spaces. We use ->tabstop
|
|
* because the ENTIRE FREAKING COMPUTER WORLD uses editors
|
|
* that don't do ^T/^D, but instead use tabs for indentation,
|
|
* and, of course, set their tabs down to 4 spaces
|
|
*/
|
|
do {
|
|
EXPAND(p->text) = ' ';
|
|
} while ( ++xp % a->tabstop );
|
|
}
|
|
else if ( c >= ' ' ) {
|
|
if ( c == '|' )
|
|
p->flags |= PIPECHAR;
|
|
EXPAND(p->text) = c;
|
|
++xp;
|
|
}
|
|
}
|
|
EXPAND(p->text) = 0;
|
|
S(p->text)--;
|
|
p->dle = mkd_firstnonblank(p);
|
|
}
|
|
|
|
|
|
/* trim leading blanks from a header line
|
|
*/
|
|
static void
|
|
header_dle(Line *p)
|
|
{
|
|
CLIP(p->text, 0, 1);
|
|
p->dle = mkd_firstnonblank(p);
|
|
}
|
|
|
|
|
|
/* build a Document from any old input.
|
|
*/
|
|
typedef int (*getc_func)(void*);
|
|
|
|
Document *
|
|
populate(getc_func getc, void* ctx, int flags)
|
|
{
|
|
Cstring line;
|
|
Document *a = new_Document();
|
|
int c;
|
|
int pandoc = 0;
|
|
|
|
if ( !a ) return 0;
|
|
|
|
a->tabstop = (flags & MKD_TABSTOP) ? 4 : TABSTOP;
|
|
|
|
CREATE(line);
|
|
|
|
while ( (c = (*getc)(ctx)) != EOF ) {
|
|
if ( c == '\n' ) {
|
|
if ( pandoc != EOF && pandoc < 3 ) {
|
|
if ( S(line) && (T(line)[0] == '%') )
|
|
pandoc++;
|
|
else
|
|
pandoc = EOF;
|
|
}
|
|
queue(a, &line);
|
|
S(line) = 0;
|
|
}
|
|
else if ( isprint(c) || isspace(c) || (c & 0x80) )
|
|
EXPAND(line) = c;
|
|
}
|
|
|
|
if ( S(line) )
|
|
queue(a, &line);
|
|
|
|
DELETE(line);
|
|
|
|
if ( (pandoc == 3) && !(flags & (MKD_NOHEADER|MKD_STRICT)) ) {
|
|
/* the first three lines started with %, so we have a header.
|
|
* clip the first three lines out of content and hang them
|
|
* off header.
|
|
*/
|
|
Line *headers = T(a->content);
|
|
|
|
a->title = headers; header_dle(a->title);
|
|
a->author= headers->next; header_dle(a->author);
|
|
a->date = headers->next->next; header_dle(a->date);
|
|
|
|
T(a->content) = headers->next->next->next;
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
|
|
/* convert a file into a linked list
|
|
*/
|
|
Document *
|
|
mkd_in(FILE *f, DWORD flags)
|
|
{
|
|
return populate((getc_func)fgetc, f, flags & INPUT_MASK);
|
|
}
|
|
|
|
|
|
/* return a single character out of a buffer
|
|
*/
|
|
struct string_ctx {
|
|
const char *data; /* the unread data */
|
|
int size; /* and how much is there? */
|
|
} ;
|
|
|
|
|
|
static int
|
|
strget(struct string_ctx *in)
|
|
{
|
|
if ( !in->size ) return EOF;
|
|
|
|
--(in->size);
|
|
|
|
return *(in->data)++;
|
|
}
|
|
|
|
|
|
/* convert a block of text into a linked list
|
|
*/
|
|
Document *
|
|
mkd_string(const char *buf, int len, DWORD flags)
|
|
{
|
|
struct string_ctx about;
|
|
|
|
about.data = buf;
|
|
about.size = len;
|
|
|
|
return populate((getc_func)strget, &about, flags & INPUT_MASK);
|
|
}
|
|
|
|
|
|
/* write the html to a file (xmlified if necessary)
|
|
*/
|
|
int
|
|
mkd_generatehtml(Document *p, FILE *output)
|
|
{
|
|
char *doc;
|
|
int szdoc;
|
|
|
|
if ( (szdoc = mkd_document(p, &doc)) != EOF ) {
|
|
if ( p->ctx->flags & MKD_CDATA )
|
|
mkd_generatexml(doc, szdoc, output);
|
|
else
|
|
fwrite(doc, szdoc, 1, output);
|
|
putc('\n', output);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* convert some markdown text to html
|
|
*/
|
|
int
|
|
markdown(Document *document, FILE *out, int flags)
|
|
{
|
|
if ( mkd_compile(document, flags) ) {
|
|
mkd_generatehtml(document, out);
|
|
mkd_cleanup(document);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* write out a Cstring, mangled into a form suitable for `<a href=` or `<a id=`
|
|
*/
|
|
void
|
|
mkd_string_to_anchor(char *s, int len, mkd_sta_function_t outchar,
|
|
void *out, int labelformat)
|
|
{
|
|
unsigned char c;
|
|
|
|
int i, size;
|
|
char *line;
|
|
|
|
size = mkd_line(s, len, &line, IS_LABEL);
|
|
|
|
if ( labelformat && (size>0) && !isalpha(line[0]) )
|
|
(*outchar)('L',out);
|
|
for ( i=0; i < size ; i++ ) {
|
|
c = line[i];
|
|
if ( labelformat ) {
|
|
if ( isalnum(c) || (c == '_') || (c == ':') || (c == '-') || (c == '.' ) )
|
|
(*outchar)(c, out);
|
|
else
|
|
(*outchar)('.', out);
|
|
}
|
|
else
|
|
(*outchar)(c,out);
|
|
}
|
|
|
|
if (line)
|
|
free(line);
|
|
}
|
|
|
|
|
|
/* ___mkd_reparse() a line
|
|
*/
|
|
static void
|
|
mkd_parse_line(char *bfr, int size, MMIOT *f, int flags)
|
|
{
|
|
___mkd_initmmiot(f, 0);
|
|
f->flags = flags & USER_FLAGS;
|
|
___mkd_reparse(bfr, size, 0, f);
|
|
___mkd_emblock(f);
|
|
}
|
|
|
|
|
|
/* ___mkd_reparse() a line, returning it in malloc()ed memory
|
|
*/
|
|
int
|
|
mkd_line(char *bfr, int size, char **res, DWORD flags)
|
|
{
|
|
MMIOT f;
|
|
int len;
|
|
|
|
mkd_parse_line(bfr, size, &f, flags);
|
|
|
|
if ( len = S(f.out) ) {
|
|
/* kludge alert; we know that T(f.out) is malloced memory,
|
|
* so we can just steal it away. This is awful -- there
|
|
* should be an opaque method that transparently moves
|
|
* the pointer out of the embedded Cstring.
|
|
*/
|
|
EXPAND(f.out) = 0;
|
|
*res = T(f.out);
|
|
T(f.out) = 0;
|
|
S(f.out) = ALLOCATED(f.out) = 0;
|
|
}
|
|
else {
|
|
*res = 0;
|
|
len = EOF;
|
|
}
|
|
___mkd_freemmiot(&f, 0);
|
|
return len;
|
|
}
|
|
|
|
|
|
/* ___mkd_reparse() a line, writing it to a FILE
|
|
*/
|
|
int
|
|
mkd_generateline(char *bfr, int size, FILE *output, DWORD flags)
|
|
{
|
|
MMIOT f;
|
|
|
|
mkd_parse_line(bfr, size, &f, flags);
|
|
if ( flags & MKD_CDATA )
|
|
mkd_generatexml(T(f.out), S(f.out), output);
|
|
else
|
|
fwrite(T(f.out), S(f.out), 1, output);
|
|
|
|
___mkd_freemmiot(&f, 0);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* set the url display callback
|
|
*/
|
|
void
|
|
mkd_e_url(Document *f, mkd_callback_t edit)
|
|
{
|
|
if ( f )
|
|
f->cb.e_url = edit;
|
|
}
|
|
|
|
|
|
/* set the url options callback
|
|
*/
|
|
void
|
|
mkd_e_flags(Document *f, mkd_callback_t edit)
|
|
{
|
|
if ( f )
|
|
f->cb.e_flags = edit;
|
|
}
|
|
|
|
|
|
/* set the url display/options deallocator
|
|
*/
|
|
void
|
|
mkd_e_free(Document *f, mkd_free_t dealloc)
|
|
{
|
|
if ( f )
|
|
f->cb.e_free = dealloc;
|
|
}
|
|
|
|
|
|
/* set the url display/options context data field
|
|
*/
|
|
void
|
|
mkd_e_data(Document *f, void *data)
|
|
{
|
|
if ( f )
|
|
f->cb.e_data = data;
|
|
}
|
|
|
|
|
|
/* set the href prefix for markdown extra style footnotes
|
|
*/
|
|
void
|
|
mkd_ref_prefix(Document *f, char *data)
|
|
{
|
|
if ( f )
|
|
f->ref_prefix = data;
|
|
}
|