+ necol = nxcol = 0;
+ ewidth = xwidth = 0;
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if (col->spacing == SIZE_MAX || icol == maxcol)
+ col->spacing = 3;
+ if (col->flags & TBL_CELL_EQUAL) {
+ necol++;
+ if (ewidth < col->width)
+ ewidth = col->width;
+ }
+ if (col->flags & TBL_CELL_WMAX)
+ nxcol++;
+ else
+ xwidth += col->width;
+ }
+
+ /*
+ * Equalize columns, if requested for any of them.
+ * Update total width of the columns not to maximize.
+ */
+
+ if (necol) {
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if ( ! (col->flags & TBL_CELL_EQUAL))
+ continue;
+ if (col->width == ewidth)
+ continue;
+ if (nxcol && rmargin)
+ xwidth += ewidth - col->width;
+ col->width = ewidth;
+ }
+ }
+
+ /*
+ * If there are any columns to maximize, find the total
+ * available width, deducting 3n margins between columns.
+ * Distribute the available width evenly.
+ */
+
+ if (nxcol && rmargin) {
+ xwidth += 3*maxcol +
+ (opts->opts & (TBL_OPT_BOX | TBL_OPT_DBOX) ?
+ 2 : !!opts->lvert + !!opts->rvert);
+ if (rmargin <= offset + xwidth)
+ return;
+ xwidth = rmargin - offset - xwidth;
+
+ /*
+ * Emulate a bug in GNU tbl width calculation that
+ * manifests itself for large numbers of x-columns.
+ * Emulating it for 5 x-columns gives identical
+ * behaviour for up to 6 x-columns.
+ */
+
+ if (nxcol == 5) {
+ quirkcol = xwidth % nxcol + 2;
+ if (quirkcol != 3 && quirkcol != 4)
+ quirkcol = -1;
+ } else
+ quirkcol = -1;
+
+ necol = 0;
+ ewidth = 0;
+ for (icol = 0; icol <= maxcol; icol++) {
+ col = tbl->cols + icol;
+ if ( ! (col->flags & TBL_CELL_WMAX))
+ continue;
+ col->width = (double)xwidth * ++necol / nxcol
+ - ewidth + 0.4995;
+ if (necol == quirkcol)
+ col->width--;
+ ewidth += col->width;