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

Revision 1.14, Fri Jan 7 14:59:52 2011 UTC (11 years, 10 months ago) by kristaps
Branch: MAIN
CVS Tags: VERSION_1_10_9
Changes since 1.13: +17 -5 lines

Fixes: T} can be followed by a delimiter then more data.  Make this
work and add documentation for it.

Also make tbl_term() not puke if the number of data cells is less than
the number of layout cells (which happens from time to time).  This
still needs work because we should pad out empty cells so that the
borders all work out.

/*	$Id: tbl_data.c,v 1.14 2011/01/07 14:59:52 kristaps Exp $ */
/*
 * Copyright (c) 2009, 2010 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.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

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

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

static	int	data(struct tbl_node *, struct tbl_span *, 
			int, const char *, int *);

static int
data(struct tbl_node *tbl, struct tbl_span *dp, 
		int ln, const char *p, int *pos)
{
	struct tbl_dat	*dat;
	struct tbl_cell	*cp;
	int		 sv;

	cp = NULL;
	if (dp->last && dp->last->layout)
		cp = dp->last->layout->next;
	else if (NULL == dp->last)
		cp = dp->layout->first;

	/* 
	 * Skip over spanners and vertical lines to data formats, since
	 * we want to match data with data layout cells in the header.
	 */

	while (cp && (TBL_CELL_VERT == cp->pos || 
				TBL_CELL_DVERT == cp->pos ||
				TBL_CELL_SPAN == cp->pos))
		cp = cp->next;

	dat = mandoc_calloc(1, sizeof(struct tbl_dat));
	dat->layout = cp;
	dat->pos = TBL_DATA_NONE;

	if (NULL == dat->layout)
		TBL_MSG(tbl, MANDOCERR_TBLEXTRADAT, ln, *pos);

	if (dp->last) {
		dp->last->next = dat;
		dp->last = dat;
	} else
		dp->last = dp->first = dat;

	sv = *pos;
	while (p[*pos] && p[*pos] != tbl->opts.tab)
		(*pos)++;

	/*
	 * Check for a continued-data scope opening.  This consists of a
	 * trailing `T{' at the end of the line.  Subsequent lines,
	 * until a standalone `T}', are included in our cell.
	 */

	if (*pos - sv == 2 && 'T' == p[sv] && '{' == p[sv + 1]) {
		tbl->part = TBL_PART_CDATA;
		return(0);
	}

	dat->string = mandoc_malloc(*pos - sv + 1);
	memcpy(dat->string, &p[sv], *pos - sv);
	dat->string[*pos - sv] = '\0';

	if (p[*pos])
		(*pos)++;

	if ( ! strcmp(dat->string, "_"))
		dat->pos = TBL_DATA_HORIZ;
	else if ( ! strcmp(dat->string, "="))
		dat->pos = TBL_DATA_DHORIZ;
	else if ( ! strcmp(dat->string, "\\_"))
		dat->pos = TBL_DATA_NHORIZ;
	else if ( ! strcmp(dat->string, "\\="))
		dat->pos = TBL_DATA_NDHORIZ;
	else
		dat->pos = TBL_DATA_DATA;

	if (NULL == dat->layout)
		return(1);

	if (TBL_CELL_HORIZ == dat->layout->pos ||
			TBL_CELL_DHORIZ == dat->layout->pos)
		if (TBL_DATA_DATA == dat->pos && '\0' != *dat->string)
			TBL_MSG(tbl, MANDOCERR_TBLIGNDATA, ln, sv);

	return(1);
}

/* ARGSUSED */
int
tbl_cdata(struct tbl_node *tbl, int ln, const char *p)
{
	struct tbl_dat	*dat;
	size_t	 	 sz;
	int		 pos;

	pos = 0;

	dat = tbl->last_span->last;
	dat->pos = TBL_DATA_DATA;

	if (p[pos] == 'T' && p[pos + 1] == '}') {
		pos += 2;
		if (p[pos] == tbl->opts.tab) {
			tbl->part = TBL_PART_DATA;
			pos++;
			return(data(tbl, tbl->last_span, ln, p, &pos));
		} else if ('\0' == p[pos]) {
			tbl->part = TBL_PART_DATA;
			return(1);
		}

		/* Fallthrough: T} is part of a word. */
	}

	if (dat->string) {
		sz = strlen(p) + strlen(dat->string) + 2;
		dat->string = mandoc_realloc(dat->string, sz);
		strlcat(dat->string, " ", sz);
		strlcat(dat->string, p, sz);
	} else
		dat->string = mandoc_strdup(p);

	return(0);
}

int
tbl_data(struct tbl_node *tbl, int ln, const char *p)
{
	struct tbl_span	*dp;
	struct tbl_row	*rp;
	int		 pos;

	pos = 0;

	if ('\0' == p[pos]) {
		TBL_MSG(tbl, MANDOCERR_TBL, ln, pos);
		return(0);
	}

	/* 
	 * Choose a layout row: take the one following the last parsed
	 * span's.  If that doesn't exist, use the last parsed span's.
	 * If there's no last parsed span, use the first row.  This can
	 * be NULL!
	 */

	if (tbl->last_span) {
		assert(tbl->last_span->layout);
		rp = tbl->last_span->layout->next;
		if (NULL == rp)
			rp = tbl->last_span->layout;
	} else
		rp = tbl->first_row;

	dp = mandoc_calloc(1, sizeof(struct tbl_span));
	dp->tbl = &tbl->opts;
	dp->layout = rp;
	dp->head = tbl->first_head;

	if (tbl->last_span) {
		tbl->last_span->next = dp;
		tbl->last_span = dp;
	} else {
		tbl->last_span = tbl->first_span = dp;
		dp->flags |= TBL_SPAN_FIRST;
	}

	if ( ! strcmp(p, "_")) {
		dp->pos = TBL_SPAN_HORIZ;
		return(1);
	} else if ( ! strcmp(p, "=")) {
		dp->pos = TBL_SPAN_DHORIZ;
		return(1);
	}

	dp->pos = TBL_SPAN_DATA;

	/* This returns 0 when TBL_PART_CDATA is entered. */

	while ('\0' != p[pos])
		if ( ! data(tbl, dp, ln, p, &pos))
			return(0);

	return(1);
}