mirror of
https://github.com/richgel999/ufo_data.git
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351 lines
8.3 KiB
C
351 lines
8.3 KiB
C
/* mkd2man.c - man-page-formatted output from markdown text */
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/*
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* Copyright (c) 2009-2015, Baptiste Daroussin and Natacha Porté
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "markdown.h"
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#include <sys/stat.h>
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#include <ctype.h>
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#define READ_UNIT 1024
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#define OUTPUT_UNIT 64
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/****************************
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* MARKDOWN TO MAN RENDERER *
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****************************/
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/* usage • print the option list */
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static void
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usage(FILE *out, const char *name) {
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fprintf(out, "Usage: %s [-h] [-d <date>] [-s <section> ] "
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"[ -t <title> ] [input-file]\n\n", name);
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fprintf(out, "\t-d, --date\n"
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"\t\tSet the date of the manpage (default: now),\n"
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"\t-h, --help\n"
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"\t\tDisplay this help text and exit without further processing\n"
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"\t-s, --section\n"
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"\t\tSet the section of the manpage (default: 1)\n"
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"\t-t, --title\n"
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"\t\tSet the title of the manpage (default: filename)\n"); }
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struct metadata {
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char *title;
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char *date;
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int section;
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};
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static void
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man_text_escape(struct buf *ob, char *src, size_t size) {
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size_t i = 0, org;
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while (i < size) {
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/* copying directly unescaped characters */
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org = i;
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while (i < size && src[i] != '-')
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i += 1;
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if (i > org) bufput(ob, src + org, i - org);
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/* escaping */
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if (i >= size) break;
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else if (src[i] == '-') BUFPUTSL(ob, "\\-");
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i += 1; } }
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static void
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man_prolog(struct buf *ob, void *opaque) {
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struct metadata *m = (struct metadata *)opaque;
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bufprintf(ob,
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".\\\" Generated by mkd2man\n"
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".Dd %s\n"
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".Dt %s %d\n"
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".Os",
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m->date,
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m->title,
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m->section
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); }
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static void
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man_epilog(struct buf *ob, void *opaque) {
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BUFPUTSL(ob, "\n"); }
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static void
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man_blockcode(struct buf *ob, struct buf *text, void *opaque) {
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if (ob->size) bufputc(ob, '\n');
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BUFPUTSL(ob, ".Bd -literal\n");
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if (text) man_text_escape(ob, text->data, text->size);
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BUFPUTSL(ob, ".Ed"); }
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static void
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man_blockquote(struct buf *ob, struct buf *text, void *opaque) {
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if (ob->size) bufputc(ob, '\n');
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BUFPUTSL(ob, ".Eo\n");
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if (text) man_text_escape(ob, text->data, text->size);
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BUFPUTSL(ob, "\n.Ec"); }
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static int
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man_codespan(struct buf *ob, struct buf *text, void *opaque) {
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if (ob->size) bufputc(ob, '\n');
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BUFPUTSL(ob, ".Bd -literal\n");
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if (text) man_text_escape(ob, text->data, text->size);
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BUFPUTSL(ob, ".Ed");
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return 1; }
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static void
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man_header(struct buf *ob, struct buf *text, int level, void *opaque) {
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if (ob->size) bufputc(ob, '\n');
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switch(level) {
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case 1:
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BUFPUTSL(ob,".Sh ");
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break;
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case 2:
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BUFPUTSL(ob, ".Ss ");
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break;
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case 3:
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BUFPUTSL(ob, ".Pp\n.Em ");
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break;
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}
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if (text) bufput(ob, text->data, text->size);
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}
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static int
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man_double_emphasis(struct buf *ob, struct buf *text, char c, void *opaque) {
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if (!text || !text->size) return 0;
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BUFPUTSL(ob, "\\fB");
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bufput(ob, text->data, text->size);
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BUFPUTSL(ob, "\\fP");
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return 1; }
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static int
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man_emphasis(struct buf *ob, struct buf *text, char c, void *opaque) {
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if (!text || !text->size) return 0;
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BUFPUTSL(ob, "\\fI");
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if (text) bufput(ob, text->data, text->size);
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BUFPUTSL(ob, "\\fP");
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return 1; }
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static int
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man_linebreak(struct buf *ob, void *opaque) {
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BUFPUTSL(ob, ".br");
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return 1; }
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static void
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man_paragraph(struct buf *ob, struct buf *text, void *opaque) {
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if (ob->size) bufputc(ob, '\n');
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BUFPUTSL(ob, ".Pp\n");
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if (text) bufput(ob, text->data, text->size); }
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static void
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man_list(struct buf *ob, struct buf *text, int flags, void *opaque) {
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if (ob->size) bufputc(ob, '\n');
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if (flags & MKD_LIST_ORDERED)
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BUFPUTSL(ob,".Bl -enum\n");
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else
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BUFPUTSL(ob,".Bl -bullet\n");
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if (text) bufput(ob, text->data, text->size);
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BUFPUTSL(ob, ".El"); }
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static void
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man_listitem(struct buf *ob, struct buf *text, int flags, void *opaque) {
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BUFPUTSL(ob, ".It\n");
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if (text) {
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while (text->size && text->data[text->size - 1] == '\n')
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text->size -= 1;
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bufput(ob, text->data, text->size); }
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BUFPUTSL(ob, "\n"); }
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static void
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man_normal_text(struct buf *ob, struct buf *text, void *opaque) {
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if (text) man_text_escape(ob, text->data, text->size); }
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/* renderer structure */
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static struct mkd_renderer to_man = {
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/* document-level callbacks */
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man_prolog,
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man_epilog,
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/* block-level callbacks */
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man_blockcode,
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man_blockquote,
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NULL,
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man_header,
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NULL,
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man_list,
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man_listitem,
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man_paragraph,
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NULL,
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NULL,
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NULL,
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/* span-level callbacks */
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NULL,
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man_codespan,
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man_double_emphasis,
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man_emphasis,
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NULL,
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man_linebreak,
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NULL,
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NULL,
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NULL,
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/* low-level callbacks */
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NULL,
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man_normal_text,
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/* renderer data */
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64,
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"*_",
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NULL };
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/*****************
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* MAIN FUNCTION *
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*****************/
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/* main • main function, interfacing STDIO with the parser */
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int
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main(int argc, char **argv) {
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struct buf *ib, *ob;
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size_t ret;
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size_t i;
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FILE *in = stdin;
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int ch, argerr, help;
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char *tmp;
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char datebuf[64];
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time_t ttm;
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struct tm *tm;
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struct stat st;
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struct metadata man_metadata;
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struct option longopts[] = {
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{ "date", required_argument, 0, 'd' },
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{ "help", no_argument, 0, 'h' },
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{ "section", required_argument, 0, 's' },
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{ "title", required_argument, 0, 't' },
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{ 0, 0, 0, 0}
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};
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man_metadata.section = 1;
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man_metadata.title = NULL;
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man_metadata.date = NULL;
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/* opening the file if given from the command line */
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argerr = help = 0;
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while (!argerr &&
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(ch = getopt_long(argc, argv, "d:hs:t:", longopts, 0)) != -1)
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switch (ch) {
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case 'd':
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man_metadata.date = optarg;
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break;
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case 'h':
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argerr = help = 1;
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break;
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case 's':
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if (strlen(optarg) != 1 &&
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strspn(optarg, "123456789") != 1) {
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argerr = 1;
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break; }
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man_metadata.section = (int)strtol(optarg,
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(char **)NULL, 10);
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break;
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case 't':
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man_metadata.title = optarg;
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break;
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default:
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argerr = 1; }
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if (argerr) {
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usage(help ? stdout : stderr, argv[0]);
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return help ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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argc -= optind;
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argv += optind;
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if (argc > 0) {
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in = fopen(argv[0], "r");
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if (!in) {
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fprintf(stderr,"Unable to open input file \"%s\": %s\n",
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argv[0], strerror(errno));
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return EXIT_FAILURE; } }
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if (!man_metadata.date) {
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if (in == stdin || stat(argv[0], &st) == -1) {
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ttm = time(NULL);
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tm = localtime(&ttm); }
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else
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tm = localtime(&st.st_mtime);
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strftime(datebuf, sizeof(datebuf), "%B %d, %Y", tm);
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man_metadata.date = datebuf;
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}
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if (in == stdin && !man_metadata.title) {
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fprintf(stderr, "When reading from stdin the title should be "
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"specified is expected\n");
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return EXIT_FAILURE; }
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if (!man_metadata.title) {
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tmp = strrchr(argv[0], '/');
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man_metadata.title = strrchr(argv[0], '/');
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if (!tmp)
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tmp = argv[0];
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else
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tmp++;
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man_metadata.title = tmp;
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tmp = strrchr(man_metadata.title, '.');
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if (tmp)
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*tmp = '\0'; }
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/* Ensure the title is uppercase */
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for (i = 0; i < strlen(man_metadata.title); i++)
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man_metadata.title[i] = toupper(man_metadata.title[i]);
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/* reading everything */
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ib = bufnew(READ_UNIT);
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bufgrow(ib, READ_UNIT);
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while ((ret = fread(ib->data + ib->size, 1,
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ib->asize - ib->size, in)) > 0) {
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ib->size += ret;
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bufgrow(ib, ib->size + READ_UNIT); }
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if (in != stdin) fclose(in);
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to_man.opaque = &man_metadata;
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/* performing markdown to man */
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ob = bufnew(OUTPUT_UNIT);
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markdown(ob, ib, &to_man);
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/* writing the result to stdout */
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ret = fwrite(ob->data, 1, ob->size, stdout);
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if (ret < ob->size)
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fprintf(stderr, "Warning: only %zu output byte written, "
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"out of %zu\n",
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ret,
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ob->size);
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/* cleanup */
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bufrelease(ib);
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bufrelease(ob);
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return EXIT_SUCCESS; }
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/* vim: set filetype=c: */
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