usr/src/cmd/mandoc/tbl.c

/*	$Id: tbl.c,v 1.26 2011/07/25 15:37:00 kristaps Exp $ */
/*
 * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2011 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.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "mandoc.h"
#include "libmandoc.h"
#include "libroff.h"

enum rofferr
tbl_read(struct tbl_node *tbl, int ln, const char *p, int offs)
{
	int		 len;
	const char	*cp;

	cp = &p[offs];
	len = (int)strlen(cp);

	/*
	 * If we're in the options section and we don't have a
	 * terminating semicolon, assume we've moved directly into the
	 * layout section.  No need to report a warning: this is,
	 * apparently, standard behaviour.
	 */

	if (TBL_PART_OPTS == tbl->part && len)
		if (';' != cp[len - 1])
			tbl->part = TBL_PART_LAYOUT;

	/* Now process each logical section of the table.  */

	switch (tbl->part) {
	case (TBL_PART_OPTS):
		return(tbl_option(tbl, ln, p) ? ROFF_IGN : ROFF_ERR);
	case (TBL_PART_LAYOUT):
		return(tbl_layout(tbl, ln, p) ? ROFF_IGN : ROFF_ERR);
	case (TBL_PART_CDATA):
		return(tbl_cdata(tbl, ln, p) ? ROFF_TBL : ROFF_IGN);
	default:
		break;
	}

	/*
	 * This only returns zero if the line is empty, so we ignore it
	 * and continue on.
	 */
	return(tbl_data(tbl, ln, p) ? ROFF_TBL : ROFF_IGN);
}

struct tbl_node *
tbl_alloc(int pos, int line, struct mparse *parse)
{
	struct tbl_node	*p;

	p = mandoc_calloc(1, sizeof(struct tbl_node));
	p->line = line;
	p->pos = pos;
	p->parse = parse;
	p->part = TBL_PART_OPTS;
	p->opts.tab = '\t';
	p->opts.linesize = 12;
	p->opts.decimal = '.';
	return(p);
}

void
tbl_free(struct tbl_node *p)
{
	struct tbl_row	*rp;
	struct tbl_cell	*cp;
	struct tbl_span	*sp;
	struct tbl_dat	*dp;
	struct tbl_head	*hp;

	while (NULL != (rp = p->first_row)) {
		p->first_row = rp->next;
		while (rp->first) {
			cp = rp->first;
			rp->first = cp->next;
			free(cp);
		}
		free(rp);
	}

	while (NULL != (sp = p->first_span)) {
		p->first_span = sp->next;
		while (sp->first) {
			dp = sp->first;
			sp->first = dp->next;
			if (dp->string)
				free(dp->string);
			free(dp);
		}
		free(sp);
	}

	while (NULL != (hp = p->first_head)) {
		p->first_head = hp->next;
		free(hp);
	}

	free(p);
}

void
tbl_restart(int line, int pos, struct tbl_node *tbl)
{
	if (TBL_PART_CDATA == tbl->part)
		mandoc_msg(MANDOCERR_TBLBLOCK, tbl->parse, 
				tbl->line, tbl->pos, NULL);

	tbl->part = TBL_PART_LAYOUT;
	tbl->line = line;
	tbl->pos = pos;

	if (NULL == tbl->first_span || NULL == tbl->first_span->first)
		mandoc_msg(MANDOCERR_TBLNODATA, tbl->parse,
				tbl->line, tbl->pos, NULL);
}

const struct tbl_span *
tbl_span(struct tbl_node *tbl)
{
	struct tbl_span	 *span;

	assert(tbl);
	span = tbl->current_span ? tbl->current_span->next
				 : tbl->first_span;
	if (span)
		tbl->current_span = span;
	return(span);
}

void
tbl_end(struct tbl_node **tblp)
{
	struct tbl_node	*tbl;

	tbl = *tblp;
	*tblp = NULL;

	if (NULL == tbl->first_span || NULL == tbl->first_span->first)
		mandoc_msg(MANDOCERR_TBLNODATA, tbl->parse, 
				tbl->line, tbl->pos, NULL);

	if (tbl->last_span)
		tbl->last_span->flags |= TBL_SPAN_LAST;

	if (TBL_PART_CDATA == tbl->part)
		mandoc_msg(MANDOCERR_TBLBLOCK, tbl->parse, 
				tbl->line, tbl->pos, NULL);
}