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Revision 1.23, Tue Oct 20 02:01:31 2015 UTC (5 years, 4 months ago) by schwarze
Branch: MAIN
Changes since 1.22: +4 -3 lines

In order to become able to generate syntax tree nodes on the roff(7)
level, validation must be separated from parsing and rewinding.
This first big step moves calling of the mdoc(7) post_*() functions
out of the parser loop into their own mdoc_validate() pass, while
using a new mdoc_state() module to make syntax tree state handling
available to both the parser loop and the validation pass.

/*	$Id: demandoc.c,v 1.23 2015/10/20 02:01:31 schwarze Exp $ */
/*
 * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "roff.h"
#include "man.h"
#include "mdoc.h"
#include "mandoc.h"

static	void	 pline(int, int *, int *, int);
static	void	 pman(const struct roff_node *, int *, int *, int);
static	void	 pmandoc(struct mparse *, int, const char *, int);
static	void	 pmdoc(const struct roff_node *, int *, int *, int);
static	void	 pstring(const char *, int, int *, int);
static	void	 usage(void);

static	const char	 *progname;

int
main(int argc, char *argv[])
{
	struct mparse	*mp;
	int		 ch, fd, i, list;
	extern int	 optind;

	if (argc < 1)
		progname = "demandoc";
	else if ((progname = strrchr(argv[0], '/')) == NULL)
		progname = argv[0];
	else
		++progname;

	mp = NULL;
	list = 0;

	while (-1 != (ch = getopt(argc, argv, "ikm:pw")))
		switch (ch) {
		case ('i'):
			/* FALLTHROUGH */
		case ('k'):
			/* FALLTHROUGH */
		case ('m'):
			/* FALLTHROUGH */
		case ('p'):
			break;
		case ('w'):
			list = 1;
			break;
		default:
			usage();
			return (int)MANDOCLEVEL_BADARG;
		}

	argc -= optind;
	argv += optind;

	mchars_alloc();
	mp = mparse_alloc(MPARSE_SO, MANDOCLEVEL_BADARG, NULL, NULL);
	assert(mp);

	if (argc < 1)
		pmandoc(mp, STDIN_FILENO, "<stdin>", list);

	for (i = 0; i < argc; i++) {
		mparse_reset(mp);
		if (mparse_open(mp, &fd, argv[i]) != MANDOCLEVEL_OK) {
			perror(argv[i]);
			continue;
		}
		pmandoc(mp, fd, argv[i], list);
	}

	mparse_free(mp);
	mchars_free();
	return (int)MANDOCLEVEL_OK;
}

static void
usage(void)
{

	fprintf(stderr, "usage: %s [-w] [files...]\n", progname);
}

static void
pmandoc(struct mparse *mp, int fd, const char *fn, int list)
{
	struct roff_man	*man;
	int		 line, col;

	mparse_readfd(mp, fd, fn);
	mparse_result(mp, &man, NULL);
	line = 1;
	col = 0;

	if (man == NULL)
		return;
	if (man->macroset == MACROSET_MDOC) {
		mdoc_validate(man);
		pmdoc(man->first->child, &line, &col, list);
	} else
		pman(man->first->child, &line, &col, list);

	if ( ! list)
		putchar('\n');
}

/*
 * Strip the escapes out of a string, emitting the results.
 */
static void
pstring(const char *p, int col, int *colp, int list)
{
	enum mandoc_esc	 esc;
	const char	*start, *end;
	int		 emit;

	/*
	 * Print as many column spaces til we achieve parity with the
	 * input document.
	 */

again:
	if (list && '\0' != *p) {
		while (isspace((unsigned char)*p))
			p++;

		while ('\'' == *p || '(' == *p || '"' == *p)
			p++;

		emit = isalpha((unsigned char)p[0]) &&
			isalpha((unsigned char)p[1]);

		for (start = p; '\0' != *p; p++)
			if ('\\' == *p) {
				p++;
				esc = mandoc_escape(&p, NULL, NULL);
				if (ESCAPE_ERROR == esc)
					return;
				emit = 0;
			} else if (isspace((unsigned char)*p))
				break;

		end = p - 1;

		while (end > start)
			if ('.' == *end || ',' == *end ||
					'\'' == *end || '"' == *end ||
					')' == *end || '!' == *end ||
					'?' == *end || ':' == *end ||
					';' == *end)
				end--;
			else
				break;

		if (emit && end - start >= 1) {
			for ( ; start <= end; start++)
				if (ASCII_HYPH == *start)
					putchar('-');
				else
					putchar((unsigned char)*start);
			putchar('\n');
		}

		if (isspace((unsigned char)*p))
			goto again;

		return;
	}

	while (*colp < col) {
		putchar(' ');
		(*colp)++;
	}

	/*
	 * Print the input word, skipping any special characters.
	 */
	while ('\0' != *p)
		if ('\\' == *p) {
			p++;
			esc = mandoc_escape(&p, NULL, NULL);
			if (ESCAPE_ERROR == esc)
				break;
		} else {
			putchar((unsigned char )*p++);
			(*colp)++;
		}
}

static void
pline(int line, int *linep, int *col, int list)
{

	if (list)
		return;

	/*
	 * Print out as many lines as needed to reach parity with the
	 * original input.
	 */

	while (*linep < line) {
		putchar('\n');
		(*linep)++;
	}

	*col = 0;
}

static void
pmdoc(const struct roff_node *p, int *line, int *col, int list)
{

	for ( ; p; p = p->next) {
		if (MDOC_LINE & p->flags)
			pline(p->line, line, col, list);
		if (ROFFT_TEXT == p->type)
			pstring(p->string, p->pos, col, list);
		if (p->child)
			pmdoc(p->child, line, col, list);
	}
}

static void
pman(const struct roff_node *p, int *line, int *col, int list)
{

	for ( ; p; p = p->next) {
		if (MAN_LINE & p->flags)
			pline(p->line, line, col, list);
		if (ROFFT_TEXT == p->type)
			pstring(p->string, p->pos, col, list);
		if (p->child)
			pman(p->child, line, col, list);
	}
}