From 5cedca1b69d020c32466f70843a11767773d7e3b Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Sat, 15 May 2004 23:24:00 +0000
Subject: Let's try this.  It's BUGGERED.

---
 src/cmd/tbl/t6.c | 223 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 223 insertions(+)
 create mode 100644 src/cmd/tbl/t6.c

(limited to 'src/cmd/tbl/t6.c')

diff --git a/src/cmd/tbl/t6.c b/src/cmd/tbl/t6.c
new file mode 100644
index 00000000..a78368fc
--- /dev/null
+++ b/src/cmd/tbl/t6.c
@@ -0,0 +1,223 @@
+/* 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, text;
+	char	*s;
+
+	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;
+					s = table[ilin][icol].col;
+					if ((int)s > 0 && (int)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",
+						    (int)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(s = table[ilin][icol].col) && !vspen(s)) {
+							if (tx((int)s) != text) 
+								continue;
+							Bprint(&tabout, ".nr %d ", TMP);
+							wide(s, 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(s = table[ilin][icol].rcol) && !vspen(s) && !barent(s)) {
+							Bprint(&tabout, ".nr %d \\w%c%s%c\n",
+							    TMP, F1, s, 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(s = table[ilin][icol].col) && !vspen(s)) {
+						if (tx((int)s) != text) 
+							continue;
+						Bprint(&tabout, ".nr %d ", TMP);
+						wide(s, 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)) {
+				s = table[ilin][icol-k].col;
+				if (!real(s) || barent(s) || vspen(s) ) 
+					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);
+	return;
+}
+
+
+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)s);
+}
+
+
+int
+filler(char *s)
+{
+	return (point(s) && s[0] == '\\' && s[1] == 'R');
+}
+
+
-- 
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