/*
 * Copyright 1990 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */


/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

 /* t6.c: compute tab stops */
# define tx(a) (a>(char *)0 && a<(char *)128)
# include "t..c"

void    wide(char *, char *, char *);

void
maktab(void)
{
# define FN(i,c) font[stynum[i]][c]
# define SZ(i,c) csize[stynum[i]][c]
/* define the tab stops of the table */
int icol, ilin, tsep, k, ik, vforml, il, text;
int doubled[MAXCOL], acase[MAXCOL];
char *s;
for(icol=0; icol <ncol; icol++)
        {
        doubled[icol] = acase[icol] = 0;
        fprintf(tabout, ".nr %d 0\n", icol+CRIGHT);
   for(text=0; text<2; text++)
        {
        if (text)
                fprintf(tabout, ".%02d\n.rm %02d\n", icol+80, icol+80);
        for(ilin=0; ilin<nlin; ilin++)
                {
                if (instead[ilin]|| fullbot[ilin]) continue;
                vforml=ilin;
                for(il=prev(ilin); il>=0 && vspen(table[il][icol].col); il=prev(il))
                        vforml=il;
                if (fspan(vforml,icol)) continue;
                if (filler(table[ilin][icol].col)) continue;
                switch(ctype(vforml,icol))
                        {
                        case 'a':
                                acase[icol]=1;
                                s = table[ilin][icol].col;
                                if (s>(char *)0 && s<(char *)128 && text)
                                        {
                                        if (doubled[icol]==0)
                                                fprintf(tabout, ".nr %d 0\n.nr %d 0\n",S1,S2);
                                        doubled[icol]=1;
                                        fprintf(tabout, ".if \\n(%c->\\n(%d .nr %d \\n(%c-\n",s,S2,S2,s);
                                        }
                                /* FALLTHROUGH */
                        case 'n':
                                if (table[ilin][icol].rcol!=0)
                                        {
                                        if (doubled[icol]==0 && text==0)
                                                fprintf(tabout, ".nr %d 0\n.nr %d 0\n", S1, S2);
                                        doubled[icol]=1;
                                        if (real(s=table[ilin][icol].col) && !vspen(s))
                                                {
                                                if (tx(s) != text) continue;
                                                fprintf(tabout, ".nr %d ", TMP);
                                                wide(s, FN(vforml,icol), SZ(vforml,icol)); fprintf(tabout, "\n");
                                                fprintf(tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n", S1, TMP, S1, TMP);
                                                }
                                        if (text==0 && real(s=table[ilin][icol].rcol) && !vspen(s) && !barent(s))
                                                {
                                                fprintf(tabout, ".nr %d \\w%c%s%c\n",TMP, F1, s, F1);
                                                fprintf(tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n",S2,TMP,S2,TMP);
                                                }
                                        continue;
                                        }
                                /* FALLTHROUGH */
                        case 'r':
                        case 'c':
                        case 'l':
                                if (real(s=table[ilin][icol].col) && !vspen(s))
                                        {
                                        if (tx(s) != text) continue;
                                        fprintf(tabout, ".nr %d ", TMP);
                                        wide(s, FN(vforml,icol), SZ(vforml,icol)); fprintf(tabout, "\n");
                                        fprintf(tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n", icol+CRIGHT, TMP, icol+CRIGHT, TMP);
                                        }
                        }
                }
                }
        if (acase[icol])
                {
                fprintf(tabout, ".if \\n(%d>=\\n(%d .nr %d \\n(%du+2n\n",S2,icol+CRIGHT,icol+CRIGHT,S2);
                }
        if (doubled[icol])
                {
                fprintf(tabout, ".nr %d \\n(%d\n", icol+CMID, S1);
                fprintf(tabout, ".nr %d \\n(%d+\\n(%d\n",TMP,icol+CMID,S2);
                fprintf(tabout, ".if \\n(%d>\\n(%d .nr %d \\n(%d\n",TMP,icol+CRIGHT,icol+CRIGHT,TMP);
                fprintf(tabout, ".if \\n(%d<\\n(%d .nr %d +(\\n(%d-\\n(%d)/2\n",TMP,icol+CRIGHT,icol+CMID,icol+CRIGHT,TMP);
                }
        if (cll[icol][0])
                {
                fprintf(tabout, ".nr %d %sn\n", TMP, cll[icol]);
                fprintf(tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n",icol+CRIGHT, TMP, icol+CRIGHT, TMP);
                }
        for(ilin=0; ilin<nlin; ilin++)
        if (k=lspan(ilin, icol))
                {
                s=table[ilin][icol-k].col;
                if (!real(s) || barent(s) || vspen(s) ) continue;
                fprintf(tabout, ".nr %d ", TMP);
                wide(table[ilin][icol-k].col, FN(ilin,icol-k), SZ(ilin,icol-k));
                for(ik=k; ik>=0; ik--)
                        {
                        fprintf(tabout, "-\\n(%d",CRIGHT+icol-ik);
                        if (!expflg && ik>0) fprintf(tabout, "-%dn", sep[icol-ik]);
                        }
                fprintf(tabout, "\n");
                fprintf(tabout, ".if \\n(%d>0 .nr %d \\n(%d/%d\n", TMP, TMP, TMP, k);
                fprintf(tabout, ".if \\n(%d<0 .nr %d 0\n", TMP, TMP);
                for(ik=0; ik<k; ik++)
                        {
                        if (doubled[icol-k+ik])
                                fprintf(tabout, ".nr %d +\\n(%d/2\n", icol-k+ik+CMID, TMP);
                        fprintf(tabout, ".nr %d +\\n(%d\n", icol-k+ik+CRIGHT, TMP);
                        }
                }
        }
if (textflg) untext();
/* if even requested, make all columns widest width */
# define TMP1 S1
# define TMP2 S2
if (evenflg)
        {
        fprintf(tabout, ".nr %d 0\n", TMP);
        for(icol=0; icol<ncol; icol++)
                {
                if (evenup[icol]==0) continue;
                fprintf(tabout, ".if \\n(%d>\\n(%d .nr %d \\n(%d\n",
                icol+CRIGHT, TMP, TMP, icol+CRIGHT);
                }
        for(icol=0; icol<ncol; icol++)
                {
                if (evenup[icol]==0)
                        /* if column not evened just retain old interval */
                        continue;
                if (doubled[icol])
                        fprintf(tabout, ".nr %d (100*\\n(%d/\\n(%d)*\\n(%d/100\n",
                                icol+CMID, icol+CMID, icol+CRIGHT, TMP);
                                /* that nonsense with the 100's and parens tries
                                   to avoid overflow while proportionally shifting
                                   the middle of the number */
                fprintf(tabout, ".nr %d \\n(%d\n", icol+CRIGHT, TMP);
                }
        }
/* now adjust for total table width */
for(tsep=icol=0; icol<ncol; icol++)
        tsep+= sep[icol];
if (expflg)
        {
        fprintf(tabout, ".nr %d 0", TMP);
        for(icol=0; icol<ncol; icol++)
                fprintf(tabout, "+\\n(%d", icol+CRIGHT);
        fprintf(tabout, "\n");
        fprintf(tabout, ".nr %d \\n(.l-\\n(.i-\\n(%d\n", TMP, TMP);
        if (boxflg || dboxflg || allflg)
                tsep += 1;
        else
                tsep -= sep[ncol-1];
        fprintf(tabout, ".nr %d \\n(%d/%d\n", TMP, TMP,  tsep);
        fprintf(tabout, ".if \\n(%d<1n .nr %d 1n\n", TMP, TMP);
        }
else
        fprintf(tabout, ".nr %d 1n\n", TMP);
fprintf(tabout, ".nr %d 0\n",CRIGHT-1);
tsep= (boxflg || allflg || dboxflg || left1flg) ? 1 : 0;
for(icol=0; icol<ncol; icol++)
        {
        fprintf(tabout, ".nr %d \\n(%d+(%d*\\n(%d)\n",icol+CLEFT, icol+CRIGHT-1, tsep, TMP);
        fprintf(tabout, ".nr %d +\\n(%d\n",icol+CRIGHT, icol+CLEFT);
        if (doubled[icol])
                {
                /* the next line is last-ditch effort to avoid zero field width */
                /*fprintf(tabout, ".if \\n(%d=0 .nr %d 1\n",icol+CMID, icol+CMID);*/
                fprintf(tabout, ".nr %d +\\n(%d\n", icol+CMID, icol+CLEFT);
        /*  fprintf(tabout, ".if n .if \\n(%d%%24>0 .nr %d +12u\n",icol+CMID, icol+CMID); */
                }
        tsep=sep[icol];
        }
if (rightl)
        fprintf(tabout, ".nr %d (\\n(%d+\\n(%d)/2\n",ncol+CRIGHT-1, ncol+CLEFT-1, ncol+CRIGHT-2);
fprintf(tabout, ".nr TW \\n(%d\n", ncol+CRIGHT-1);
if (boxflg || allflg || dboxflg)
        fprintf(tabout, ".nr TW +%d*\\n(%d\n", sep[ncol-1], TMP);
fprintf(tabout,
 ".if t .if \\n(TW>\\n(.li .tm Table at line %d file %s is too wide - \\n(TW units\n", iline-1, ifile);
return;
}

void
wide(char *s, char *fn, char *size)
{
if (point(s))
        {
        fprintf(tabout, "\\w%c", F1);
        if (*fn>0) putfont(fn);
        if (*size) putsize(size);
        fprintf(tabout, "%s", s);
        if (*fn>0) putfont("P");
        if (*size) putsize("0");
        fprintf(tabout, "%c",F1);
        }
else
        fprintf(tabout, "\\n(%c-", s);
}

int
filler(char *s)
{
return (point(s) && s[0]=='\\' && s[1] == 'R');
}