out.h

   1 /*      $Id: out.h,v 1.29 2017/06/08 18:11:22 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2014, 2017 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
  19 enum    roffscale {
  20         SCALE_CM, /* centimeters (c) */
  21         SCALE_IN, /* inches (i) */
  22         SCALE_PC, /* pica (P) */
  23         SCALE_PT, /* points (p) */
  24         SCALE_EM, /* ems (m) */
  25         SCALE_MM, /* mini-ems (M) */
  26         SCALE_EN, /* ens (n) */
  27         SCALE_BU, /* default horizontal (u) */
  28         SCALE_VS, /* default vertical (v) */
  29         SCALE_FS, /* syn. for u (f) */
  30         SCALE_MAX
  31 };
  32
  33 struct  roffcol {
  34         size_t           width; /* width of cell */
  35         size_t           decimal; /* decimal position in cell */
  36         int              flags; /* layout flags, see tbl_cell */
  37 };
  38
  39 struct  roffsu {
  40         enum roffscale    unit;
  41         double            scale;
  42 };
  43
  44 typedef size_t  (*tbl_sulen)(const struct roffsu *, void *);
  45 typedef size_t  (*tbl_strlen)(const char *, void *);
  46 typedef size_t  (*tbl_len)(size_t, void *);
  47
  48 struct  rofftbl {
  49         tbl_sulen        sulen; /* calculate scaling unit length */
  50         tbl_strlen       slen; /* calculate string length */
  51         tbl_len          len; /* produce width of empty space */
  52         struct roffcol  *cols; /* master column specifiers */
  53         void            *arg; /* passed to sulen, slen, and len */
  54 };
  55
  56 #define SCALE_VS_INIT(p, v) \
  57         do { (p)->unit = SCALE_VS; \
  58              (p)->scale = (v); } \
  59         while (/* CONSTCOND */ 0)
  60
  61 #define SCALE_HS_INIT(p, v) \
  62         do { (p)->unit = SCALE_EN; \
  63              (p)->scale = (v); } \
  64         while (/* CONSTCOND */ 0)
  65
  66
  67 struct  tbl_span;
  68
  69 const char       *a2roffsu(const char *, struct roffsu *, enum roffscale);
  70 void              tblcalc(struct rofftbl *tbl,
  71                         const struct tbl_span *, size_t);