ref: c3ba64f6935322f09b6de5c2285544fd471c605d
dir: /sys/src/cmd/tbl/t6.c/
/* t6.c: compute tab stops */
# define tx(a) (a>0 && a<128)
# include "t.h"
# define FN(i,c) font[c][stynum[i]]
# define SZ(i,c) csize[c][stynum[i]]
# define TMP1 S1
# define TMP2 S2
void
maktab(void) /* define the tab stops of the table */
{
int icol, ilin, tsep, k, ik, vforml, il, s, text;
char *ss;
for (icol = 0; icol < ncol; icol++) {
doubled[icol] = acase[icol] = 0;
Bprint(&tabout, ".nr %2s 0\n", reg(icol, CRIGHT));
for (text = 0; text < 2; text++) {
if (text)
Bprint(&tabout, ".%2s\n.rm %2s\n", reg(icol, CRIGHT),
reg(icol, CRIGHT));
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;
if ((flags[icol][stynum[ilin]] & ZEROW) != 0)
continue;
switch (ctype(vforml, icol)) {
case 'a':
acase[icol] = 1;
ss = table[ilin][icol].col;
s = (int)(uintptr)ss;
if (s > 0 && s < 128 && text) {
if (doubled[icol] == 0)
Bprint(&tabout, ".nr %d 0\n.nr %d 0\n",
S1, S2);
doubled[icol] = 1;
Bprint(&tabout, ".if \\n(%c->\\n(%d .nr %d \\n(%c-\n",
s, S2, S2, (int)s);
}
case 'n':
if (table[ilin][icol].rcol != 0) {
if (doubled[icol] == 0 && text == 0)
Bprint(&tabout, ".nr %d 0\n.nr %d 0\n",
S1, S2);
doubled[icol] = 1;
if (real(ss = table[ilin][icol].col) && !vspen(ss)) {
s = (int)(uintptr)ss;
if (tx(s) != text)
continue;
Bprint(&tabout, ".nr %d ", TMP);
wide(ss, FN(vforml, icol), SZ(vforml, icol));
Bprint(&tabout, "\n");
Bprint(&tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n",
S1, TMP, S1, TMP);
}
if (text == 0 && real(ss = table[ilin][icol].rcol) && !vspen(ss) && !barent(ss)) {
Bprint(&tabout, ".nr %d \\w%c%s%c\n",
TMP, F1, ss, F1);
Bprint(&tabout, ".if \\n(%d<\\n(%d .nr %d \\n(%d\n", S2, TMP, S2,
TMP);
}
continue;
}
case 'r':
case 'c':
case 'l':
if (real(ss = table[ilin][icol].col) && !vspen(ss)) {
s = (int)(uintptr)ss;
if (tx(s) != text)
continue;
Bprint(&tabout, ".nr %d ", TMP);
wide(ss, FN(vforml, icol), SZ(vforml, icol));
Bprint(&tabout, "\n");
Bprint(&tabout, ".if \\n(%2s<\\n(%d .nr %2s \\n(%d\n",
reg(icol, CRIGHT), TMP, reg(icol, CRIGHT), TMP);
}
}
}
}
if (acase[icol]) {
Bprint(&tabout, ".if \\n(%d>=\\n(%2s .nr %2s \\n(%du+2n\n",
S2, reg(icol, CRIGHT), reg(icol, CRIGHT), S2);
}
if (doubled[icol]) {
Bprint(&tabout, ".nr %2s \\n(%d\n", reg(icol, CMID), S1);
Bprint(&tabout, ".nr %d \\n(%2s+\\n(%d\n", TMP, reg(icol, CMID), S2);
Bprint(&tabout, ".if \\n(%d>\\n(%2s .nr %2s \\n(%d\n", TMP,
reg(icol, CRIGHT), reg(icol, CRIGHT), TMP);
Bprint(&tabout, ".if \\n(%d<\\n(%2s .nr %2s +(\\n(%2s-\\n(%d)/2\n",
TMP, reg(icol, CRIGHT), reg(icol, CMID), reg(icol, CRIGHT), TMP);
}
if (cll[icol][0]) {
Bprint(&tabout, ".nr %d %sn\n", TMP, cll[icol]);
Bprint(&tabout, ".if \\n(%2s<\\n(%d .nr %2s \\n(%d\n",
reg(icol, CRIGHT), TMP, reg(icol, CRIGHT), TMP);
}
for (ilin = 0; ilin < nlin; ilin++)
if (k = lspan(ilin, icol)) {
ss = table[ilin][icol-k].col;
if (!real(ss) || barent(ss) || vspen(ss) )
continue;
Bprint(&tabout, ".nr %d ", TMP);
wide(table[ilin][icol-k].col, FN(ilin, icol - k), SZ(ilin, icol - k));
for (ik = k; ik >= 0; ik--) {
Bprint(&tabout, "-\\n(%2s", reg(icol - ik, CRIGHT));
if (!expflg && ik > 0)
Bprint(&tabout, "-%dn", sep[icol-ik]);
}
Bprint(&tabout, "\n");
Bprint(&tabout, ".if \\n(%d>0 .nr %d \\n(%d/%d\n", TMP,
TMP, TMP, k);
Bprint(&tabout, ".if \\n(%d<0 .nr %d 0\n", TMP, TMP);
for (ik = 1; ik <= k; ik++) {
if (doubled[icol-k+ik])
Bprint(&tabout, ".nr %2s +\\n(%d/2\n",
reg(icol - k + ik, CMID), TMP);
Bprint(&tabout, ".nr %2s +\\n(%d\n",
reg(icol - k + ik, CRIGHT), TMP);
}
}
}
if (textflg)
untext();
/* if even requested, make all columns widest width */
if (evenflg) {
Bprint(&tabout, ".nr %d 0\n", TMP);
for (icol = 0; icol < ncol; icol++) {
if (evenup[icol] == 0)
continue;
Bprint(&tabout, ".if \\n(%2s>\\n(%d .nr %d \\n(%2s\n",
reg(icol, CRIGHT), TMP, TMP, reg(icol, CRIGHT));
}
for (icol = 0; icol < ncol; icol++) {
if (evenup[icol] == 0)
/* if column not evened just retain old interval */
continue;
if (doubled[icol])
Bprint(&tabout, ".nr %2s (100*\\n(%2s/\\n(%2s)*\\n(%d/100\n",
reg(icol, CMID), reg(icol, CMID), reg(icol, CRIGHT), TMP);
/* that nonsense with the 100's and parens tries
to avoid overflow while proportionally shifting
the middle of the number */
Bprint(&tabout, ".nr %2s \\n(%d\n", reg(icol, CRIGHT), TMP);
}
}
/* now adjust for total table width */
for (tsep = icol = 0; icol < ncol; icol++)
tsep += sep[icol];
if (expflg) {
Bprint(&tabout, ".nr %d 0", TMP);
for (icol = 0; icol < ncol; icol++)
Bprint(&tabout, "+\\n(%2s", reg(icol, CRIGHT));
Bprint(&tabout, "\n");
Bprint(&tabout, ".nr %d \\n(.l-\\n(%d\n", TMP, TMP);
if (boxflg || dboxflg || allflg)
/* tsep += 1; */ {}
else
tsep -= sep[ncol-1];
Bprint(&tabout, ".nr %d \\n(%d/%d\n", TMP, TMP, tsep);
Bprint(&tabout, ".if \\n(%d<0 .nr %d 0\n", TMP, TMP);
} else
Bprint(&tabout, ".nr %d 1n\n", TMP);
Bprint(&tabout, ".nr %2s 0\n", reg(-1, CRIGHT));
tsep = (boxflg || allflg || dboxflg || left1flg) ? 2 : 0;
if (sep[-1] >= 0)
tsep = sep[-1];
for (icol = 0; icol < ncol; icol++) {
Bprint(&tabout, ".nr %2s \\n(%2s+((%d*\\n(%d)/2)\n", reg(icol, CLEFT),
reg(icol - 1, CRIGHT), tsep, TMP);
Bprint(&tabout, ".nr %2s +\\n(%2s\n", reg(icol, CRIGHT), reg(icol, CLEFT));
if (doubled[icol]) {
/* the next line is last-ditch effort to avoid zero field width */
/*Bprint(&tabout, ".if \\n(%2s=0 .nr %2s 1\n",reg(icol,CMID), reg(icol,CMID));*/
Bprint(&tabout, ".nr %2s +\\n(%2s\n", reg(icol, CMID),
reg(icol, CLEFT));
/* Bprint(&tabout, ".if n .if \\n(%s%%24>0 .nr %s +12u\n",reg(icol,CMID), reg(icol,CMID)); */
}
tsep = sep[icol] * 2;
}
if (rightl)
Bprint(&tabout, ".nr %s (\\n(%s+\\n(%s)/2\n", reg(ncol - 1, CRIGHT),
reg(ncol - 1, CLEFT), reg(ncol - 2, CRIGHT));
Bprint(&tabout, ".nr TW \\n(%2s\n", reg(ncol - 1, CRIGHT));
tsep = sep[ncol-1];
if (boxflg || allflg || dboxflg)
Bprint(&tabout, ".nr TW +((%d*\\n(%d)/2)\n", tsep, TMP);
Bprint(&tabout,
".if t .if (\\n(TW+\\n(.o)>7.65i .tm Table at line %d file %s is too wide - \\n(TW units\n", iline - 1, ifile);
}
void
wide(char *s, char *fn, char *size)
{
if (point(s)) {
Bprint(&tabout, "\\w%c", F1);
if (*fn > 0)
putfont(fn);
if (*size)
putsize(size);
Bprint(&tabout, "%s", s);
if (*fn > 0)
putfont("P");
if (*size)
putsize("0");
Bprint(&tabout, "%c", F1);
} else
Bprint(&tabout, "\\n(%c-", (int)(uintptr)s);
}
int
filler(char *s)
{
return (point(s) && s[0] == '\\' && s[1] == 'R');
}