a6f1e1ee5b
It implements missing man(7) macros used in base by kerberos/ntp and makes them supported by mandoc. This import should have been done before the removal of groff. Reported by: gordon
356 lines
8.6 KiB
C
356 lines
8.6 KiB
C
/* $Id: out.c,v 1.65 2017/06/08 18:11:22 schwarze Exp $ */
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/*
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* Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2011, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "mandoc_aux.h"
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#include "mandoc.h"
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#include "out.h"
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static void tblcalc_data(struct rofftbl *, struct roffcol *,
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const struct tbl_opts *, const struct tbl_dat *,
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size_t);
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static void tblcalc_literal(struct rofftbl *, struct roffcol *,
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const struct tbl_dat *, size_t);
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static void tblcalc_number(struct rofftbl *, struct roffcol *,
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const struct tbl_opts *, const struct tbl_dat *);
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/*
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* Parse the *src string and store a scaling unit into *dst.
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* If the string doesn't specify the unit, use the default.
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* If no default is specified, fail.
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* Return a pointer to the byte after the last byte used,
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* or NULL on total failure.
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*/
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const char *
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a2roffsu(const char *src, struct roffsu *dst, enum roffscale def)
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{
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char *endptr;
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dst->unit = def == SCALE_MAX ? SCALE_BU : def;
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dst->scale = strtod(src, &endptr);
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if (endptr == src)
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return NULL;
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switch (*endptr++) {
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case 'c':
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dst->unit = SCALE_CM;
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break;
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case 'i':
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dst->unit = SCALE_IN;
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break;
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case 'f':
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dst->unit = SCALE_FS;
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break;
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case 'M':
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dst->unit = SCALE_MM;
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break;
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case 'm':
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dst->unit = SCALE_EM;
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break;
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case 'n':
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dst->unit = SCALE_EN;
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break;
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case 'P':
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dst->unit = SCALE_PC;
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break;
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case 'p':
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dst->unit = SCALE_PT;
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break;
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case 'u':
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dst->unit = SCALE_BU;
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break;
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case 'v':
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dst->unit = SCALE_VS;
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break;
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case '\0':
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endptr--;
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/* FALLTHROUGH */
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default:
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if (SCALE_MAX == def)
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return NULL;
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dst->unit = def;
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break;
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}
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return endptr;
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}
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/*
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* Calculate the abstract widths and decimal positions of columns in a
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* table. This routine allocates the columns structures then runs over
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* all rows and cells in the table. The function pointers in "tbl" are
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* used for the actual width calculations.
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*/
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void
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tblcalc(struct rofftbl *tbl, const struct tbl_span *sp,
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size_t totalwidth)
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{
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struct roffsu su;
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const struct tbl_opts *opts;
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const struct tbl_dat *dp;
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struct roffcol *col;
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size_t ewidth, xwidth;
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int spans;
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int icol, maxcol, necol, nxcol, quirkcol;
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/*
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* Allocate the master column specifiers. These will hold the
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* widths and decimal positions for all cells in the column. It
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* must be freed and nullified by the caller.
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*/
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assert(NULL == tbl->cols);
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tbl->cols = mandoc_calloc((size_t)sp->opts->cols,
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sizeof(struct roffcol));
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opts = sp->opts;
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for (maxcol = -1; sp; sp = sp->next) {
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if (TBL_SPAN_DATA != sp->pos)
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continue;
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spans = 1;
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/*
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* Account for the data cells in the layout, matching it
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* to data cells in the data section.
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*/
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for (dp = sp->first; dp; dp = dp->next) {
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/* Do not used spanned cells in the calculation. */
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if (0 < --spans)
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continue;
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spans = dp->spans;
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if (1 < spans)
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continue;
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icol = dp->layout->col;
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if (maxcol < icol)
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maxcol = icol;
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col = tbl->cols + icol;
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col->flags |= dp->layout->flags;
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if (dp->layout->flags & TBL_CELL_WIGN)
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continue;
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if (dp->layout->wstr != NULL &&
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dp->layout->width == 0 &&
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a2roffsu(dp->layout->wstr, &su, SCALE_EN)
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!= NULL)
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dp->layout->width =
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(*tbl->sulen)(&su, tbl->arg);
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if (col->width < dp->layout->width)
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col->width = dp->layout->width;
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tblcalc_data(tbl, col, opts, dp, dp->block ?
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totalwidth / (sp->opts->cols + 1) : 0);
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}
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}
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/*
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* Count columns to equalize and columns to maximize.
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* Find maximum width of the columns to equalize.
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* Find total width of the columns *not* to maximize.
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*/
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necol = nxcol = 0;
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ewidth = xwidth = 0;
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for (icol = 0; icol <= maxcol; icol++) {
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col = tbl->cols + icol;
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if (col->flags & TBL_CELL_EQUAL) {
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necol++;
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if (ewidth < col->width)
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ewidth = col->width;
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}
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if (col->flags & TBL_CELL_WMAX)
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nxcol++;
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else
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xwidth += col->width;
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}
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/*
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* Equalize columns, if requested for any of them.
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* Update total width of the columns not to maximize.
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*/
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if (necol) {
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for (icol = 0; icol <= maxcol; icol++) {
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col = tbl->cols + icol;
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if ( ! (col->flags & TBL_CELL_EQUAL))
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continue;
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if (col->width == ewidth)
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continue;
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if (nxcol && totalwidth)
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xwidth += ewidth - col->width;
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col->width = ewidth;
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}
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}
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/*
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* If there are any columns to maximize, find the total
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* available width, deducting 3n margins between columns.
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* Distribute the available width evenly.
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*/
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if (nxcol && totalwidth) {
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xwidth += 3*maxcol +
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(opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
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2 : !!opts->lvert + !!opts->rvert);
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if (xwidth >= totalwidth)
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return;
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xwidth = totalwidth - xwidth;
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/*
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* Emulate a bug in GNU tbl width calculation that
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* manifests itself for large numbers of x-columns.
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* Emulating it for 5 x-columns gives identical
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* behaviour for up to 6 x-columns.
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*/
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if (nxcol == 5) {
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quirkcol = xwidth % nxcol + 2;
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if (quirkcol != 3 && quirkcol != 4)
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quirkcol = -1;
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} else
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quirkcol = -1;
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necol = 0;
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ewidth = 0;
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for (icol = 0; icol <= maxcol; icol++) {
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col = tbl->cols + icol;
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if ( ! (col->flags & TBL_CELL_WMAX))
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continue;
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col->width = (double)xwidth * ++necol / nxcol
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- ewidth + 0.4995;
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if (necol == quirkcol)
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col->width--;
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ewidth += col->width;
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}
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}
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}
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static void
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tblcalc_data(struct rofftbl *tbl, struct roffcol *col,
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const struct tbl_opts *opts, const struct tbl_dat *dp, size_t mw)
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{
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size_t sz;
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/* Branch down into data sub-types. */
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switch (dp->layout->pos) {
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case TBL_CELL_HORIZ:
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case TBL_CELL_DHORIZ:
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sz = (*tbl->len)(1, tbl->arg);
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if (col->width < sz)
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col->width = sz;
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break;
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case TBL_CELL_LONG:
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case TBL_CELL_CENTRE:
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case TBL_CELL_LEFT:
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case TBL_CELL_RIGHT:
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tblcalc_literal(tbl, col, dp, mw);
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break;
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case TBL_CELL_NUMBER:
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tblcalc_number(tbl, col, opts, dp);
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break;
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case TBL_CELL_DOWN:
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break;
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default:
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abort();
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}
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}
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static void
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tblcalc_literal(struct rofftbl *tbl, struct roffcol *col,
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const struct tbl_dat *dp, size_t mw)
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{
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const char *str; /* Beginning of the first line. */
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const char *beg; /* Beginning of the current line. */
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char *end; /* End of the current line. */
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size_t sz; /* Length of the current line. */
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if (dp->string == NULL || *dp->string == '\0')
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return;
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str = mw ? mandoc_strdup(dp->string) : dp->string;
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for (beg = str; beg != NULL && *beg != '\0'; beg = end) {
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end = mw ? strchr(beg, ' ') : NULL;
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if (end != NULL) {
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*end++ = '\0';
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while (*end == ' ')
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end++;
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}
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sz = (*tbl->slen)(beg, tbl->arg);
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if (col->width < sz)
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col->width = sz;
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}
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if (mw)
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free((void *)str);
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}
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static void
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tblcalc_number(struct rofftbl *tbl, struct roffcol *col,
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const struct tbl_opts *opts, const struct tbl_dat *dp)
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{
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int i;
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size_t sz, psz, ssz, d;
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const char *str;
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char *cp;
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char buf[2];
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/*
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* First calculate number width and decimal place (last + 1 for
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* non-decimal numbers). If the stored decimal is subsequent to
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* ours, make our size longer by that difference
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* (right-"shifting"); similarly, if ours is subsequent the
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* stored, then extend the stored size by the difference.
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* Finally, re-assign the stored values.
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*/
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str = dp->string ? dp->string : "";
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sz = (*tbl->slen)(str, tbl->arg);
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/* FIXME: TBL_DATA_HORIZ et al.? */
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buf[0] = opts->decimal;
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buf[1] = '\0';
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psz = (*tbl->slen)(buf, tbl->arg);
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if (NULL != (cp = strrchr(str, opts->decimal))) {
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buf[1] = '\0';
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for (ssz = 0, i = 0; cp != &str[i]; i++) {
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buf[0] = str[i];
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ssz += (*tbl->slen)(buf, tbl->arg);
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}
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d = ssz + psz;
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} else
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d = sz + psz;
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/* Adjust the settings for this column. */
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if (col->decimal > d) {
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sz += col->decimal - d;
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d = col->decimal;
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} else
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col->width += d - col->decimal;
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if (sz > col->width)
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col->width = sz;
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if (d > col->decimal)
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col->decimal = d;
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}
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