moving markdown.c to cmarkdown.c
adding header a bunch of other stuff. --HG-- rename : markdown.c => cmarkdown.c
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gottox@rootkit.lan
parent
10a52a6dbb
commit
689de59fd2
1 changed files with 88 additions and 56 deletions
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@ -1,56 +1,85 @@
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/* cmarkdown
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* Copyright (C) <2007> Enno boland <g@s01.de>
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*
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* cmarkdown free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* To compile type
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* gcc -DVERSION=\"`date +%F`\" -o cmarkdown cmarkdown.c
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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struct Tag {
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char *search;
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int hasChilds;
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char *prefix, *suffix;
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};
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typedef unsigned int (*Parser)(const char *, const char *);
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#define BUFFERSIZE 1024
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#define ERRMALLOC eprint("malloc failed\n");
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#define LENGTH(x) sizeof(x)/sizeof(x[0])
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typedef unsigned int (*Parser)(const char *, const char *);
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struct Tag {
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char *search;
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int process;
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char *tag;
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};
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void eprint(const char *errstr, ...); /* Prints error and exits */
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void process(const char *begin, const char *end);
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/* Processes range between begin and end with parser (NULL = all parsers) */
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unsigned int doreplace(const char *begin, const char *end);
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/* Parser for simple replaces */
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unsigned int dolineprefix(const char *begin, const char *end);
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/* Parser for line prefix tags */
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unsigned int dosurround(const char *begin, const char *end);
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/* Parser for surrounding tags */
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unsigned int dounderline(const char *begin, const char *end);
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/* Parser for underline tags */
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unsigned int dolink(const char *begin, const char *end);
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/* Parser for links and images */
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Parser parsers[] = { dounderline, dolineprefix, dosurround, dolink, doreplace };
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/* list of parsers */
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FILE *source;
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unsigned int bsize = 0;
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struct Tag lineprefix[] = {
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{ " ", 0, "<pre>", "</pre>" },
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{ "\t", 0, "<pre>", "</pre>" },
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{ "> ", 1, "<blockquote>", "</blockquote>" },
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{ " ", 0, "pre" },
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{ "\t", 0, "pre" },
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{ "> ", 1, "blockquote" },
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};
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struct Tag underline[] = {
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{ "=", 1, "<h1>", "</h1>" },
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{ "-", 1, "<h2>", "</h2>" },
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{ "=", 1, "h1" },
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{ "-", 1, "h2" },
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};
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struct Tag surround[] = {
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{ "_", 1, "<b>", "</b>" },
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{ "*", 1, "<i>", "</i>" },
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{ "``", 0, "code" },
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{ "`", 0, "code" },
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{ "__", 1, "strong" },
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{ "**", 1, "strong" },
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{ "*", 1, "em" },
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{ "_", 1, "em" },
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};
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char * replace[][2] = {
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{ "\n---\n", "\n<hr />\n" },
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{ "\n\n", "\n<br />\n" },
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{ "\n\n", "<br />\n<br />\n" },
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{ "<", "<" },
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{ ">", ">" },
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{ "&", "&" },
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{ "\"", """ },
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};
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void eprint(const char *errstr, ...);
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void process(const char *begin, const char *end, Parser parser);
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unsigned int doreplace(const char *begin, const char *end);
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unsigned int dolineprefix(const char *begin, const char *end);
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unsigned int dosurround(const char *begin, const char *end);
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unsigned int dounderline(const char *begin, const char *end);
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unsigned int dolink(const char *begin, const char *end);
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Parser parsers[] = { dounderline, dolineprefix, dosurround, dolink, doreplace };
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void
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eprint(const char *errstr, ...) {
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va_list ap;
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@ -83,16 +112,16 @@ dolink(const char *begin, const char *end) {
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if(img) {
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fputs("<img src=\"",stdout);
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process(link,link+linklen, doreplace);
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process(link,link+linklen);
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fputs("\" alt=\"",stdout);
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process(desc,desc+desclen, NULL);
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process(desc,desc+desclen);
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fputs("\" />",stdout);
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}
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else {
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fputs("<a href=\"",stdout);
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process(link,link+linklen, doreplace);
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process(link,link+linklen);
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fputs("\">",stdout);
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process(desc,desc+desclen, NULL);
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process(desc,desc+desclen);
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fputs("</a>",stdout);
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}
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return p + 1 - begin;
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@ -109,12 +138,18 @@ dosurround(const char *begin, const char *end) {
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continue;
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for(ps = surround[i].search; *ps == '\n'; ps++);
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l = strlen(ps);
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p = strstr(begin + strlen(surround[i].search), ps);
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p = begin + strlen(surround[i].search) - 1;
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do {
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p = strstr(p+1, ps);
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} while(p && p[-1] == '\\');
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if(!p || p > end)
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continue;
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fputs(surround[i].prefix,stdout);
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fwrite(begin + strlen(surround[i].search), sizeof(char), p - begin - l, stdout);
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fputs(surround[i].suffix,stdout);
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printf("<%s>",surround[i].tag);
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if(surround[i].process)
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process(begin + strlen(surround[i].search), p);
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else
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fwrite(begin + strlen(surround[i].search), p - begin - l, sizeof(char), stdout);
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printf("</%s>",surround[i].tag);
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return p - begin + l;
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}
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return 0;
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@ -152,7 +187,7 @@ dolineprefix(const char *begin, const char *end) {
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if(!(buffer = malloc(end - begin+1)))
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ERRMALLOC;
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fputs(lineprefix[i].prefix, stdout);
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printf("<%s>",surround[i].tag);
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for(p = begin, j = 0; p != end; p++, j++) {
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buffer[j] = *p;
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if(*p == '\n') {
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@ -161,11 +196,11 @@ dolineprefix(const char *begin, const char *end) {
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p += l;
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}
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}
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if(lineprefix[i].hasChilds)
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process(buffer,buffer+strlen(buffer), NULL);
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if(lineprefix[i].process)
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process(buffer,buffer+strlen(buffer));
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else
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fputs(buffer, stdout);
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fputs(lineprefix[i].suffix, stdout);
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fwrite(buffer,strlen(buffer), sizeof(char),stdout);
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printf("</%s>",surround[i].tag);
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free(buffer);
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return p - begin;
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}
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@ -187,30 +222,26 @@ dounderline(const char *begin, const char *end) {
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for(j = 0; p[j] != '\n' && p[j] == underline[i].search[0] && p+j != end; j++);
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if(j >= l) {
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putchar('\n');
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fputs(underline[i].prefix,stdout);
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if(underline[i].hasChilds)
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process(begin + 1, begin + l + 1, NULL);
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printf("<%s>",underline[i].tag);
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if(underline[i].process)
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process(begin+1, begin + l + 1);
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else
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fwrite(begin+1,l,sizeof(char),stdout);
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fputs(underline[i].suffix,stdout);
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printf("</%s>",underline[i].tag);
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return j + l + 2;
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}
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}
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return 0;
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}
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void
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process(const char *begin, const char *end, Parser parser) {
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process(const char *begin, const char *end) {
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const char *p;
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int affected;
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unsigned int i;
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for(p = begin; *p && p != end;) {
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affected = 0;
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if(parser)
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affected = parser(p, end);
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else
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for(i = 0; i < LENGTH(parsers) && affected == 0; i++)
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affected = parsers[i](p, end);
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if(affected == 0) {
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@ -231,12 +262,13 @@ main(int argc, char *argv[]) {
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if(argc > 1 && strcmp("-v", argv[1]) == 0)
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eprint("markdown in C "VERSION" (C) Enno Boland\n");
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else if(argc > 1 && strcmp("-h", argv[1]) == 0)
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eprint("Usage markdown [file]\n");
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eprint("Usage %s [file]\n",argv[0]);
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else if (argc > 1 && strcmp("-", argv[1]) != 0 && !(source = fopen(argv[1],"r")))
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eprint("Cannot open file `%s`\n",argv[1]);
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if(!(buffer = malloc(BUFFERSIZE)))
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ERRMALLOC;
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bsize = BUFFERSIZE;
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/* needed to properly process first line */
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strcpy(buffer,"\n");
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p = buffer+strlen(buffer);
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@ -250,6 +282,6 @@ main(int argc, char *argv[]) {
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}
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}
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process(buffer,buffer+strlen(buffer), NULL);
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process(buffer,buffer+strlen(buffer));
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free(buffer);
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}
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