101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
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/*
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* github_flavoured -- implement the obnoxious "returns are hard newlines"
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* feature in github flavoured markdown.
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*
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* Copyright (C) 2012 David 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 "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "cstring.h"
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#include "markdown.h"
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#include "amalloc.h"
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/* build a Document from any old input.
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*/
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typedef int (*getc_func)(void*);
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Document *
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gfm_populate(getc_func getc, void* ctx, int flags)
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{
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Cstring line;
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Document *a = __mkd_new_Document();
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int c;
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int pandoc = 0;
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if ( !a ) return 0;
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a->tabstop = (flags & MKD_TABSTOP) ? 4 : TABSTOP;
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CREATE(line);
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while ( (c = (*getc)(ctx)) != EOF ) {
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if ( c == '\n' ) {
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if ( pandoc != EOF && pandoc < 3 ) {
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if ( S(line) && (T(line)[0] == '%') )
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pandoc++;
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else
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pandoc = EOF;
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}
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if (pandoc == EOF) {
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EXPAND(line) = ' ';
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EXPAND(line) = ' ';
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}
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__mkd_enqueue(a, &line);
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S(line) = 0;
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}
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else if ( isprint(c) || isspace(c) || (c & 0x80) )
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EXPAND(line) = c;
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}
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if ( S(line) )
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__mkd_enqueue(a, &line);
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DELETE(line);
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if ( (pandoc == 3) && !(flags & (MKD_NOHEADER|MKD_STRICT)) ) {
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/* the first three lines started with %, so we have a header.
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* clip the first three lines out of content and hang them
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* off header.
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*/
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Line *headers = T(a->content);
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a->title = headers; __mkd_header_dle(a->title);
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a->author= headers->next; __mkd_header_dle(a->author);
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a->date = headers->next->next; __mkd_header_dle(a->date);
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T(a->content) = headers->next->next->next;
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}
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return a;
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}
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/* convert a block of text into a linked list
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*/
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Document *
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gfm_string(const char *buf, int len, DWORD flags)
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{
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struct string_stream about;
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about.data = buf;
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about.size = len;
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return gfm_populate((getc_func)__mkd_io_strget, &about, flags & INPUT_MASK);
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}
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/* convert a file into a linked list
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*/
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Document *
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gfm_in(FILE *f, DWORD flags)
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{
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return gfm_populate((getc_func)fgetc, f, flags & INPUT_MASK);
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}
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