xref: /openbsd/usr.bin/mandoc/out.h (revision f463ffc6)
1 /* $OpenBSD: out.h,v 1.26 2022/09/11 09:12:47 schwarze Exp $ */
2 /*
3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4  * Copyright (c) 2014, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  *
18  * Utilities for use by multiple mandoc(1) formatters.
19  */
20 
21 enum	roffscale {
22 	SCALE_CM, /* centimeters (c) */
23 	SCALE_IN, /* inches (i) */
24 	SCALE_PC, /* pica (P) */
25 	SCALE_PT, /* points (p) */
26 	SCALE_EM, /* ems (m) */
27 	SCALE_MM, /* mini-ems (M) */
28 	SCALE_EN, /* ens (n) */
29 	SCALE_BU, /* default horizontal (u) */
30 	SCALE_VS, /* default vertical (v) */
31 	SCALE_FS, /* syn. for u (f) */
32 	SCALE_MAX
33 };
34 
35 struct	roffcol {
36 	size_t		 width; /* width of cell */
37 	size_t		 nwidth; /* max. width of number in cell */
38 	size_t		 decimal; /* decimal position in cell */
39 	size_t		 spacing; /* spacing after the column */
40 	int		 flags; /* layout flags, see tbl_cell */
41 };
42 
43 struct	roffsu {
44 	enum roffscale	  unit;
45 	double		  scale;
46 };
47 
48 typedef	size_t	(*tbl_sulen)(const struct roffsu *, void *);
49 typedef	size_t	(*tbl_strlen)(const char *, void *);
50 typedef	size_t	(*tbl_len)(size_t, void *);
51 
52 struct	rofftbl {
53 	tbl_sulen	 sulen; /* calculate scaling unit length */
54 	tbl_strlen	 slen; /* calculate string length */
55 	tbl_len		 len; /* produce width of empty space */
56 	struct roffcol	*cols; /* master column specifiers */
57 	void		*arg; /* passed to sulen, slen, and len */
58 };
59 
60 
61 struct	tbl_span;
62 
63 const char	 *a2roffsu(const char *, struct roffsu *, enum roffscale);
64 void		  tblcalc(struct rofftbl *,
65 			const struct tbl_span *, size_t, size_t);
66