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File: [cvsweb.bsd.lv] / mandoc / roff_validate.c (download)

Revision 1.9, Wed Jun 14 22:51:25 2017 UTC (4 years, 1 month ago) by schwarze
Branch: MAIN
CVS Tags: VERSION_1_14_4, VERSION_1_14_3, VERSION_1_14_2
Changes since 1.8: +2 -1 lines

Naive implementation of the roff(7) .po (page offset) request.

This clearly works when .po is called on the top level, but might
not be sophisticated enough if people call .po inside indentation-changing
contexts, but i haven't seen that in manual pages (yet :).

/*	$Id: roff_validate.c,v 1.9 2017/06/14 22:51:25 schwarze Exp $ */
/*
 * Copyright (c) 2010, 2017 Ingo Schwarze <schwarze@openbsd.org>
 *
 * 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 <sys/types.h>

#include <assert.h>
#include <stddef.h>

#include "mandoc.h"
#include "roff.h"
#include "libmandoc.h"
#include "roff_int.h"

#define	ROFF_VALID_ARGS struct roff_man *man, struct roff_node *n

typedef	void	(*roff_valid_fp)(ROFF_VALID_ARGS);

static	void	  roff_valid_ft(ROFF_VALID_ARGS);

static	const roff_valid_fp roff_valids[ROFF_MAX] = {
	NULL,  /* br */
	NULL,  /* ce */
	roff_valid_ft,  /* ft */
	NULL,  /* ll */
	NULL,  /* mc */
	NULL,  /* po */
	NULL,  /* rj */
	NULL,  /* sp */
	NULL,  /* ta */
	NULL,  /* ti */
};


void
roff_validate(struct roff_man *man)
{
	struct roff_node	*n;

	n = man->last;
	assert(n->tok < ROFF_MAX);
	if (roff_valids[n->tok] != NULL)
		(*roff_valids[n->tok])(man, n);
}

static void
roff_valid_ft(ROFF_VALID_ARGS)
{
	char	*cp;

	if (n->child == NULL) {
		man->next = ROFF_NEXT_CHILD;
		roff_word_alloc(man, n->line, n->pos, "P");
		man->last = n;
		return;
	}

	cp = n->child->string;
	switch (*cp) {
	case '1':
	case '2':
	case '3':
	case '4':
	case 'I':
	case 'P':
	case 'R':
		if (cp[1] == '\0')
			return;
		break;
	case 'B':
		if (cp[1] == '\0' || (cp[1] == 'I' && cp[2] == '\0'))
			return;
		break;
	case 'C':
		if (cp[1] == 'W' && cp[2] == '\0')
			return;
		break;
	default:
		break;
	}

	mandoc_vmsg(MANDOCERR_FT_BAD, man->parse,
	    n->line, n->pos, "ft %s", cp);
	roff_node_delete(man, n);
}