===================================================================
RCS file: /cvs/mandoc/tbl_data.c,v
retrieving revision 1.2
retrieving revision 1.43
diff -u -p -r1.2 -r1.43
--- mandoc/tbl_data.c	2010/12/30 09:34:07	1.2
+++ mandoc/tbl_data.c	2017/06/16 20:01:06	1.43
@@ -1,6 +1,7 @@
-/*	$Id: tbl_data.c,v 1.2 2010/12/30 09:34:07 kristaps Exp $ */
+/*	$Id: tbl_data.c,v 1.43 2017/06/16 20:01:06 schwarze Exp $ */
 /*
- * Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2015, 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
@@ -14,89 +15,257 @@
  * 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 <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 #include "mandoc.h"
+#include "mandoc_aux.h"
 #include "libmandoc.h"
 #include "libroff.h"
 
-static	void	data(struct tbl *, struct tbl_span *, 
-			int, const char *, int *);
+static	void		 getdata(struct tbl_node *, struct tbl_span *,
+				int, const char *, int *);
+static	struct tbl_span	*newspan(struct tbl_node *, int,
+				struct tbl_row *);
 
-void
-data(struct tbl *tbl, struct tbl_span *dp, 
+
+static void
+getdata(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;
 
-	/* FIXME: warn about losing data contents if cell is HORIZ. */
+	/* Advance to the next layout cell, skipping spanners. */
 
-	dat = mandoc_calloc(1, sizeof(struct tbl_dat));
+	cp = dp->last == NULL ? dp->layout->first : dp->last->layout->next;
+	while (cp != NULL && cp->pos == TBL_CELL_SPAN)
+		cp = cp->next;
 
-	if (dp->last) {
+	/*
+	 * If the current layout row is out of cells, allocate
+	 * a new cell if another row of the table has at least
+	 * this number of columns, or discard the input if we
+	 * are beyond the last column of the table as a whole.
+	 */
+
+	if (cp == NULL) {
+		if (dp->layout->last->col + 1 < dp->opts->cols) {
+			cp = mandoc_calloc(1, sizeof(*cp));
+			cp->pos = TBL_CELL_LEFT;
+			dp->layout->last->next = cp;
+			cp->col = dp->layout->last->col + 1;
+			dp->layout->last = cp;
+		} else {
+			mandoc_msg(MANDOCERR_TBLDATA_EXTRA, tbl->parse,
+			    ln, *pos, p + *pos);
+			while (p[*pos])
+				(*pos)++;
+			return;
+		}
+	}
+
+	dat = mandoc_calloc(1, sizeof(*dat));
+	dat->layout = cp;
+	dat->pos = TBL_DATA_NONE;
+	dat->spans = 0;
+	for (cp = cp->next; cp != NULL; cp = cp->next)
+		if (cp->pos == TBL_CELL_SPAN)
+			dat->spans++;
+		else
+			break;
+
+	if (dp->last == NULL)
+		dp->first = dat;
+	else
 		dp->last->next = dat;
-		dp->last = dat;
-	} else
-		dp->last = dp->first = dat;
+	dp->last = dat;
 
 	sv = *pos;
-	while (p[*pos] && p[*pos] != tbl->tab)
+	while (p[*pos] && p[*pos] != tbl->opts.tab)
 		(*pos)++;
 
-	dat->string = mandoc_malloc(*pos - sv + 1);
-	memcpy(dat->string, &p[sv], *pos - sv);
-	dat->string[*pos - sv] = '\0';
+	/*
+	 * 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 && p[sv] == 'T' && p[sv + 1] == '{') {
+		tbl->part = TBL_PART_CDATA;
+		return;
+	}
+
+	dat->string = mandoc_strndup(p + sv, *pos - sv);
+
 	if (p[*pos])
 		(*pos)++;
 
-	/* XXX: do the strcmps, then malloc(). */
-
 	if ( ! strcmp(dat->string, "_"))
-		dat->flags |= TBL_DATA_HORIZ;
+		dat->pos = TBL_DATA_HORIZ;
 	else if ( ! strcmp(dat->string, "="))
-		dat->flags |= TBL_DATA_DHORIZ;
+		dat->pos = TBL_DATA_DHORIZ;
 	else if ( ! strcmp(dat->string, "\\_"))
-		dat->flags |= TBL_DATA_NHORIZ;
+		dat->pos = TBL_DATA_NHORIZ;
 	else if ( ! strcmp(dat->string, "\\="))
-		dat->flags |= TBL_DATA_NDHORIZ;
+		dat->pos = TBL_DATA_NDHORIZ;
+	else
+		dat->pos = TBL_DATA_DATA;
+
+	if ((dat->layout->pos == TBL_CELL_HORIZ ||
+	    dat->layout->pos == TBL_CELL_DHORIZ ||
+	    dat->layout->pos == TBL_CELL_DOWN) &&
+	    dat->pos == TBL_DATA_DATA && *dat->string != '\0')
+		mandoc_msg(MANDOCERR_TBLDATA_SPAN,
+		    tbl->parse, ln, sv, dat->string);
 }
 
 int
-tbl_data(struct tbl *tbl, int ln, const char *p)
+tbl_cdata(struct tbl_node *tbl, int ln, const char *p, int pos)
 {
-	struct tbl_span	*dp;
-	int		 pos;
+	struct tbl_dat	*dat;
+	size_t		 sz;
 
-	pos = 0;
+	dat = tbl->last_span->last;
 
-	if ('\0' == p[pos]) {
-		TBL_MSG(tbl, MANDOCERR_TBL, ln, pos);
-		return(1);
+	if (p[pos] == 'T' && p[pos + 1] == '}') {
+		pos += 2;
+		if (p[pos] == tbl->opts.tab) {
+			tbl->part = TBL_PART_DATA;
+			pos++;
+			while (p[pos] != '\0')
+				getdata(tbl, tbl->last_span, ln, p, &pos);
+			return 1;
+		} else if (p[pos] == '\0') {
+			tbl->part = TBL_PART_DATA;
+			return 1;
+		}
+
+		/* Fallthrough: T} is part of a word. */
 	}
 
-	dp = mandoc_calloc(1, sizeof(struct tbl_span));
+	dat->pos = TBL_DATA_DATA;
+	dat->block = 1;
 
-	if (tbl->last_span) {
-		tbl->last_span->next = dp;
-		tbl->last_span = dp;
+	if (dat->string != NULL) {
+		sz = strlen(p + pos) + strlen(dat->string) + 2;
+		dat->string = mandoc_realloc(dat->string, sz);
+		(void)strlcat(dat->string, " ", sz);
+		(void)strlcat(dat->string, p + pos, sz);
 	} else
-		tbl->last_span = tbl->first_span = dp;
+		dat->string = mandoc_strdup(p + pos);
 
+	if (dat->layout->pos == TBL_CELL_DOWN)
+		mandoc_msg(MANDOCERR_TBLDATA_SPAN, tbl->parse,
+		    ln, pos, dat->string);
+
+	return 0;
+}
+
+static struct tbl_span *
+newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
+{
+	struct tbl_span	*dp;
+
+	dp = mandoc_calloc(1, sizeof(*dp));
+	dp->line = line;
+	dp->opts = &tbl->opts;
+	dp->layout = rp;
+	dp->prev = tbl->last_span;
+
+	if (dp->prev == NULL) {
+		tbl->first_span = dp;
+		tbl->current_span = NULL;
+	} else
+		dp->prev->next = dp;
+	tbl->last_span = dp;
+
+	return dp;
+}
+
+void
+tbl_data(struct tbl_node *tbl, int ln, const char *p, int pos)
+{
+	struct tbl_row	*rp;
+	struct tbl_cell	*cp;
+	struct tbl_span	*sp, *spi;
+	struct tbl_dat	*dp;
+	int		 have_data, spans;
+
+	rp = (sp = tbl->last_span) == NULL ? tbl->first_row :
+	    sp->pos == TBL_SPAN_DATA && sp->layout->next != NULL ?
+	    sp->layout->next : sp->layout;
+
+	assert(rp != NULL);
+
+	sp = newspan(tbl, ln, rp);
+
 	if ( ! strcmp(p, "_")) {
-		dp->flags |= TBL_SPAN_HORIZ;
-		return(1);
+		sp->pos = TBL_SPAN_HORIZ;
+		return;
 	} else if ( ! strcmp(p, "=")) {
-		dp->flags |= TBL_SPAN_DHORIZ;
-		return(1);
+		sp->pos = TBL_SPAN_DHORIZ;
+		return;
 	}
+	sp->pos = TBL_SPAN_DATA;
 
-	while ('\0' != p[pos])
-		data(tbl, dp, ln, p, &pos);
+	while (p[pos] != '\0')
+		getdata(tbl, sp, ln, p, &pos);
 
-	return(1);
+	/*
+	 * If this span contains some data,
+	 * make sure at least part of it gets printed.
+	 */
+
+	have_data = 0;
+	cp = rp->first;
+	for (dp = sp->first; dp != NULL; dp = dp->next) {
+		if (dp->pos == TBL_DATA_DATA && *dp->string != '\0') {
+			if (cp == NULL ||
+			    (cp->pos != TBL_CELL_HORIZ &&
+			     cp->pos != TBL_CELL_DHORIZ))
+				return;
+			have_data = 1;
+		}
+		spans = dp->spans;
+		while (spans-- >= 0) {
+			if (cp != NULL)
+				cp = cp->next;
+		}
+	}
+	if (have_data == 0 || rp->next == NULL)
+		return;
+
+	/*
+	 * There is some data, but it would all get lost
+	 * due to horizontal lines in the layout.
+	 * Insert an empty span to consume the layout row.
+	 */
+
+	tbl->last_span = sp->prev;
+	spi = newspan(tbl, ln, rp);
+	spi->pos = TBL_SPAN_DATA;
+	spi->next = sp;
+	tbl->last_span = sp;
+	sp->prev = spi;
+	sp->layout = rp->next;
+	cp = sp->layout->first;
+	for (dp = sp->first; dp != NULL; dp = dp->next) {
+		dp->layout = cp;
+		dp->spans = 0;
+		if (cp != NULL)
+			cp = cp->next;
+		while (cp != NULL && cp->pos == TBL_CELL_SPAN) {
+			dp->spans++;
+			cp = cp->next;
+		}
+	}
 }