Bell 32V development

Work on file usr/src/cmd/tbl/tv.c

Co-Authored-By: John Reiser <jfr@research.uucp>
Synthesized-from: 32v

diff --git a/usr/src/cmd/tbl/tv.c b/usr/src/cmd/tbl/tv.c
new file mode 100644 (file)
index 0000000..eaf0c8b
--- /dev/null
+++ b/usr/src/cmd/tbl/tv.c
@@ -0,0 +1,147 @@
+ /* tv.c: draw vertical lines */
+# include "t..c"
+drawvert(start,end, c, lwid)
+{
+char *exb=0, *ext=0;
+int tp=0, sl, ln, pos, epb, ept, vm;
+end++;
+vm='v';
+/* note: nr 35 has value of 1m outside of linesize */
+while (instead[end]) end++;
+for(ln=0; ln<lwid; ln++)
+       {
+       epb=ept=0;
+       pos = 2*ln-lwid+1;
+       if (pos!=tp) fprintf(tabout, "\\h'%dp'", pos-tp);
+       tp = pos;
+       if (end<nlin)
+               {
+               if (fullbot[end]|| (!instead[end] && allh(end)))
+                       epb=2;
+               else
+               switch (midbar(end,c))
+                       {
+                       case '-':
+                       exb = "1v-.5m"; break;
+                       case '=':
+                       exb = "1v-.5m";
+                       epb = 1; break;
+                       }
+               }
+       if (lwid>1)
+       switch(interh(end, c))
+               {
+               case THRU: epb -= 1; break;
+               case RIGHT: epb += (ln==0 ? 1 : -1); break;
+               case LEFT: epb += (ln==1 ? 1 : -1); break;
+               }
+       if (lwid==1)
+       switch(interh(end,c))
+               {
+               case THRU: epb -= 1; break;
+               case RIGHT: case LEFT: epb += 1; break;
+               }
+       if (start>0)
+               {
+               sl = start-1;
+               while (sl>=0 && instead[sl]) sl--;
+               if (sl>=0 && (fullbot[sl] || allh(sl)))
+                       ept=0;
+               else
+               if (sl>=0)
+               switch(midbar(sl,c))
+                       {
+                       case '-':
+                       ext = ".5m"; break;
+                       case '=':
+                       ext= ".5m"; ept = -1; break;
+                       default:
+                               vm = 'm'; break;
+                       }
+               else
+                       ept = -4;
+               }
+       else if (start==0 && allh(0))
+               {
+               ept=0;
+               vm = 'm';
+               }
+       if (lwid>1)
+               switch(interh(start,c))
+                       {
+                       case THRU: ept += 1; break;
+                       case LEFT: ept += (ln==0 ? 1 : -1); break;
+                       case RIGHT: ept += (ln==1 ? 1 : -1); break;
+                       }
+       else if (lwid==1)
+               switch(interh(start,c))
+                       {
+                       case THRU: ept += 1; break;
+                       case LEFT: case RIGHT: ept -= 1; break;
+                       }
+       if (exb)
+               fprintf(tabout, "\\v'%s'", exb);
+       if (epb)
+               fprintf(tabout, "\\v'%dp'", epb);
+       fprintf(tabout, "\\s\\n(%d",LSIZE);
+       if (linsize)
+               fprintf(tabout, "\\v'-\\n(%dp/6u'", LSIZE);
+       fprintf(tabout, "\\h'-\\n(#~u'"); /* adjustment for T450 nroff boxes */
+       fprintf(tabout, "\\L'|\\n(#%cu-%s", linestop[start]+'a'-1, vm=='v'? "1v" : "\\n(35u");
+       if (ext)
+               fprintf(tabout, "-(%s)",ext);
+       if (exb)
+               fprintf(tabout, "-(%s)", exb);
+       pos = ept-epb;
+       if (pos)
+               fprintf(tabout, "%s%dp", pos>=0? "+" : "", pos);
+       /* the string #d is either "nl" or ".d" depending
+          on diversions; on GCOS not the same */
+       fprintf(tabout, "'\\s0\\v'\\n(\\*(#du-\\n(#%cu+%s", linestop[start]+'a'-1,vm=='v' ? "1v" : "\\n(35u");
+       if (ext)
+               fprintf(tabout, "+%s",ext);
+       if (ept)
+               fprintf(tabout, "%s%dp", (-ept)>0 ? "+" : "", (-ept));
+       fprintf(tabout, "'");
+       if (linsize)
+               fprintf(tabout, "\\v'\\n(%dp/6u'", LSIZE);
+       }
+}
+
+
+midbar(i,c)
+{
+int k;
+k = midbcol(i,c);
+if (k==0 && c>0)
+       k = midbcol(i, c-1);
+return(k);
+}
+midbcol(i,c)
+{
+int ct;
+while ( (ct=ctype(i,c)) == 's')
+       c--;
+if (ct=='-' || ct == '=')
+       return(ct);
+if (ct=barent(table[i][c].col))
+       return(ct);
+return(0);
+}
+
+barent(s)
+       char *s;
+{
+if (s==0) return (1);
+if (s[0]== '\\') s++;
+if (s[1]!= 0)
+       return(0);
+switch(s[0])
+       {
+       case '_':
+               return('-');
+       case '=':
+               return('=');
+       }
+return(0);
+}