Stuff tbl_calc() into out.c so that it can be shared by all output modes

(isn't now, but will need to be, used by -T[x]html also).  Necessitated
a lot of churn in getting tbl_calc* code out of tbl_term.c and into
out.c, including renaming some structures and so on.  The abstraction is
in having a pointer to a wrapper function for calculating string widths.
The char devices use term_strlen and term_len; the others will probably
just use strlen().

While at it, remove some superfluous assertions in the tbl code.  This
allows all tbl manuals to clear.

Lastly, set the right-margin to be the maximum margin for each table
span.  This allows big, complicated tbl-pages like terminfo to be
displayed.  They're ugly, but they work.

1 files changed, 25 insertions, 14 deletions

diff --git a/out.h b/out.h
index ee91b3d4..9802389f 100644
--- a/out.h
+++ b/out.h
@@ -21,6 +21,21 @@
 
 __BEGIN_DECLS
 
+struct	roffcol {
+	size_t		 width; /* width of cell */
+	size_t		 decimal; /* decimal position in cell */
+};
+
+typedef	size_t (*tbl_strlen)(const char *, void *);
+typedef	size_t (*tbl_len)(size_t, void *);
+
+struct	rofftbl {
+	tbl_strlen	 slen; /* calculate string length */
+	tbl_len		 len; /* produce width of empty space */
+	struct roffcol	*cols; /* master column specifiers */
+	void		*arg; /* passed to slen and len */
+};
+
 enum	roffscale {
 	SCALE_CM,
 	SCALE_IN,
@@ -40,11 +55,11 @@ enum	roffdeco {
 	DECO_SPECIAL, /* special character */
 	DECO_SSPECIAL, /* single-char special */
 	DECO_RESERVED, /* reserved word */
-	DECO_BOLD,
-	DECO_ITALIC,
-	DECO_ROMAN,
-	DECO_PREVIOUS,
-	DECO_NOSPACE,
+	DECO_BOLD, /* bold font */
+	DECO_ITALIC, /* italic font */
+	DECO_ROMAN, /* "normal" undecorated font */
+	DECO_PREVIOUS, /* revert to previous font */
+	DECO_NOSPACE, /* suppress spacing */
 	DECO_FONT, /* font */
 	DECO_FFONT, /* font family */
 	DECO_MAX
@@ -55,10 +70,6 @@ struct	roffsu {
 	double		  scale;
 };
 
-#define	SCALE_INVERT(p) \
-	do { (p)->scale = -(p)->scale; } \
-	while (/* CONSTCOND */ 0)
-
 #define	SCALE_VS_INIT(p, v) \
 	do { (p)->unit = SCALE_VS; \
 	     (p)->scale = (v); } \
@@ -69,11 +80,11 @@ struct	roffsu {
 	     (p)->scale = (v); } \
 	while (/* CONSTCOND */ 0)
 
-int		  a2roffsu(const char *, 
-			struct roffsu *, enum roffscale);
-int		  a2roffdeco(enum roffdeco *, const char **, size_t *);
-void		  time2a(time_t, char *, size_t);
+int	  a2roffsu(const char *, struct roffsu *, enum roffscale);
+int	  a2roffdeco(enum roffdeco *, const char **, size_t *);
+void	  time2a(time_t, char *, size_t);
+void	  tblcalc(struct rofftbl *tbl, const struct tbl_span *);
 
 __END_DECLS
 
-#endif /*!HTML_H*/
+#endif /*!OUT_H*/