1 /*
2 * Copyright 1990 Sun Microsystems, Inc. All rights reserved.
3 * Use is subject to license terms.
4 */
5
6 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
7 /* All Rights Reserved */
8
9 /*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15 /* tv.c: draw vertical lines */
16 # include "t..c"
17
18 void
drawvert(int start,int end,int c,int lwid)19 drawvert(int start, int end, int c, int lwid)
20 {
21 char *exb=0, *ext=0;
22 int tp=0, sl, ln, pos, epb, ept, vm;
23 end++;
24 vm='v';
25 /* note: nr 35 has value of 1m outside of linesize */
26 while (instead[end]) end++;
27 for(ln=0; ln<lwid; ln++)
28 {
29 epb=ept=0;
30 pos = 2*ln-lwid+1;
31 if (pos!=tp) fprintf(tabout, "\\h'%dp'", pos-tp);
32 tp = pos;
33 if (end<nlin)
34 {
35 if (fullbot[end]|| (!instead[end] && allh(end)))
36 epb=2;
37 else
38 switch (midbar(end,c))
39 {
40 case '-':
41 exb = "1v-.5m"; break;
42 case '=':
43 exb = "1v-.5m";
44 epb = 1; break;
45 }
46 }
47 if (lwid>1)
48 switch(interh(end, c))
49 {
50 case THRU: epb -= 1; break;
51 case RIGHT: epb += (ln==0 ? 1 : -1); break;
52 case LEFT: epb += (ln==1 ? 1 : -1); break;
53 }
54 if (lwid==1)
55 switch(interh(end,c))
56 {
57 case THRU: epb -= 1; break;
58 case RIGHT: case LEFT: epb += 1; break;
59 }
60 if (start>0)
61 {
62 sl = start-1;
63 while (sl>=0 && instead[sl]) sl--;
64 if (sl>=0 && (fullbot[sl] || allh(sl)))
65 ept=0;
66 else
67 if (sl>=0)
68 switch(midbar(sl,c))
69 {
70 case '-':
71 ext = ".5m"; break;
72 case '=':
73 ext= ".5m"; ept = -1; break;
74 default:
75 vm = 'm'; break;
76 }
77 else
78 ept = -4;
79 }
80 else if (start==0 && allh(0))
81 {
82 ept=0;
83 vm = 'm';
84 }
85 if (lwid>1)
86 switch(interh(start,c))
87 {
88 case THRU: ept += 1; break;
89 case LEFT: ept += (ln==0 ? 1 : -1); break;
90 case RIGHT: ept += (ln==1 ? 1 : -1); break;
91 }
92 else if (lwid==1)
93 switch(interh(start,c))
94 {
95 case THRU: ept += 1; break;
96 case LEFT: case RIGHT: ept -= 1; break;
97 }
98 if (exb)
99 fprintf(tabout, "\\v'%s'", exb);
100 if (epb)
101 fprintf(tabout, "\\v'%dp'", epb);
102 fprintf(tabout, "\\s\\n(%d",LSIZE);
103 if (linsize)
104 fprintf(tabout, "\\v'-\\n(%dp/6u'", LSIZE);
105 fprintf(tabout, "\\h'-\\n(#~u'"); /* adjustment for T450 nroff boxes */
106 fprintf(tabout, "\\L'|\\n(#%cu-%s", linestop[start]+'a'-1, vm=='v'? "1v" : "\\n(35u");
107 if (ext)
108 fprintf(tabout, "-(%s)",ext);
109 if (exb)
110 fprintf(tabout, "-(%s)", exb);
111 pos = ept-epb;
112 if (pos)
113 fprintf(tabout, "%s%dp", pos>=0? "+" : "", pos);
114 /* the string #d is either "nl" or ".d" depending
115 on diversions; on GCOS not the same */
116 fprintf(tabout, "'\\s0\\v'\\n(\\*(#du-\\n(#%cu+%s", linestop[start]+'a'-1,vm=='v' ? "1v" : "\\n(35u");
117 if (ext)
118 fprintf(tabout, "+%s",ext);
119 if (ept)
120 fprintf(tabout, "%s%dp", (-ept)>0 ? "+" : "", (-ept));
121 fprintf(tabout, "'");
122 if (linsize)
123 fprintf(tabout, "\\v'\\n(%dp/6u'", LSIZE);
124 }
125 }
126
127 int
midbar(int i,int c)128 midbar(int i, int c)
129 {
130 int k;
131 k = midbcol(i,c);
132 if (k==0 && c>0)
133 k = midbcol(i, c-1);
134 return(k);
135 }
136
137 int
midbcol(int i,int c)138 midbcol(int i, int c)
139 {
140 int ct;
141 while ( (ct=ctype(i,c)) == 's')
142 c--;
143 if (ct=='-' || ct == '=')
144 return(ct);
145 if (ct=barent(table[i][c].col))
146 return(ct);
147 return(0);
148 }
149
150 int
barent(char * s)151 barent(char *s)
152 {
153 if (s==0) return (1);
154 if (!point(s)) return(1);
155 if (s[0]== '\\') s++;
156 if (s[1]!= 0)
157 return(0);
158 switch(s[0])
159 {
160 case '_':
161 return('-');
162 case '=':
163 return('=');
164 }
165 return(0);
166 }
167