Commit | Line | Data |
---|---|---|
9fb37411 BJ |
1 | static char *sccsid = "@(#)tk.c 4.1 (Berkeley) %G%"; |
2 | /* | |
3 | * optimize output for Tek 4014 | |
4 | */ | |
5 | ||
6 | #include <stdio.h> | |
7 | #include <signal.h> | |
8 | ||
9 | #define MAXY 3071 | |
10 | #define LINE 47 | |
11 | #define XOFF 248 | |
12 | #define US 037 | |
13 | #define GS 035 | |
14 | #define ESC 033 | |
15 | #define CR 015 | |
16 | #define FF 014 | |
17 | #define SO 016 | |
18 | #define SI 017 | |
19 | ||
20 | int pl = 66*LINE; | |
21 | int yyll = -1; | |
22 | char obuf[BUFSIZ]; | |
23 | int xx = XOFF; | |
24 | int xoff = XOFF; | |
25 | int coff = 0; | |
26 | int ncol = 0; | |
27 | int maxcol = 1; | |
28 | int yy = MAXY; | |
29 | int ohy = -1; | |
30 | int ohx = -1; | |
31 | int oxb = -1; | |
32 | int oly = -1; | |
33 | int olx = -1; | |
34 | int alpha; | |
35 | int ry; | |
36 | FILE *ttyin; | |
37 | ||
38 | main(argc, argv) | |
39 | int argc; | |
40 | char **argv; | |
41 | { | |
42 | register i, j; | |
43 | extern ex(); | |
44 | ||
45 | while (--argc > 0 && (++argv)[0][0]=='-') | |
46 | switch(argv[0][1]) { | |
47 | case 'p': | |
48 | if (i = atoi(&argv[0][2])) | |
49 | pl = i; | |
50 | yyll = MAXY + 1 - pl; | |
51 | break; | |
52 | default: | |
53 | if (i = atoi(&argv[0][1])) { | |
54 | maxcol = i; | |
55 | xx = xoff = 0; | |
56 | coff = 4096/i; | |
57 | } | |
58 | break; | |
59 | } | |
60 | if ((ttyin = fopen("/dev/tty", "r")) != NULL) | |
61 | setbuf(ttyin, (char *)NULL); | |
62 | if (argc) { | |
63 | if (freopen(argv[0], "r", stdin) == NULL) { | |
64 | fprintf(stderr, "tk: cannot open %s\n", argv[0]); | |
65 | exit(1); | |
66 | } | |
67 | } | |
68 | signal(SIGINT, ex); | |
69 | setbuf(stdout, obuf); | |
70 | ncol = maxcol; | |
71 | init(); | |
72 | while ((i = getchar()) != EOF) { | |
73 | switch(i) { | |
74 | ||
75 | case FF: | |
76 | yy = 0; | |
77 | case '\n': | |
78 | xx = xoff; | |
79 | yy -= LINE; | |
80 | alpha = 0; | |
81 | if (yy < yyll) { | |
82 | ncol++; | |
83 | yy = 0; | |
84 | sendpt(0); | |
85 | putchar(US); | |
86 | fflush(stdout); | |
87 | if (ncol >= maxcol) | |
88 | kwait(); | |
89 | init(); | |
90 | } | |
91 | continue; | |
92 | ||
93 | case CR: | |
94 | xx = xoff; | |
95 | alpha = 0; | |
96 | continue; | |
97 | ||
98 | case ' ': | |
99 | xx += 31; | |
100 | alpha = 0; | |
101 | continue; | |
102 | ||
103 | case '\t': /*tabstops at 8*31=248*/ | |
104 | j = ((xx-xoff)/248) + 1; | |
105 | xx += j*248 - (xx-xoff); | |
106 | alpha = 0; | |
107 | continue; | |
108 | ||
109 | case '\b': | |
110 | xx -= 31; | |
111 | alpha = 0; | |
112 | continue; | |
113 | ||
114 | case ESC: | |
115 | switch(i = getchar()) { | |
116 | case '7': | |
117 | yy += LINE; | |
118 | alpha = 0; | |
119 | continue; | |
120 | case '8': | |
121 | yy += (LINE + ry)/2; | |
122 | ry = (LINE + ry)%2; | |
123 | alpha = 0; | |
124 | continue; | |
125 | case '9': | |
126 | yy -= (LINE - ry)/2; | |
127 | ry = -(LINE - ry)%2; | |
128 | alpha = 0; | |
129 | continue; | |
130 | default: | |
131 | continue; | |
132 | } | |
133 | ||
134 | default: | |
135 | sendpt(alpha); | |
136 | if (alpha==0) { | |
137 | putchar(US); | |
138 | alpha = 1; | |
139 | } | |
140 | putchar(i); | |
141 | if (i>' ') | |
142 | xx += 31; | |
143 | continue; | |
144 | } | |
145 | } | |
146 | xx = xoff; | |
147 | yy = 0; | |
148 | sendpt(0); | |
149 | putchar(US); | |
150 | kwait(); | |
151 | ex(); | |
152 | } | |
153 | ||
154 | init() | |
155 | { | |
156 | ohx = oxb = olx = ohy = oly = -1; | |
157 | if (ncol >= maxcol) { | |
158 | ncol = 0; | |
159 | if (maxcol > 1) | |
160 | xoff = 0; | |
161 | else | |
162 | xoff = XOFF; | |
163 | } else | |
164 | xoff += coff; | |
165 | xx = xoff; | |
166 | yy = MAXY; | |
167 | if (ncol==0) | |
168 | fputs("\033\014\033;", stdout); | |
169 | sendpt(0); | |
170 | } | |
171 | ||
172 | ex() | |
173 | { | |
174 | yy = MAXY; | |
175 | xx = 0; | |
176 | fputs("\033;\037", stdout); | |
177 | sendpt(1); | |
178 | exit(0); | |
179 | } | |
180 | ||
181 | kwait() | |
182 | { | |
183 | register c; | |
184 | ||
185 | fflush(stdout); | |
186 | if (ttyin==NULL) | |
187 | return; | |
188 | while ((c=getc(ttyin))!='\n') { | |
189 | if (c=='!') { | |
190 | execom(); | |
191 | printf("!\n"); | |
192 | fflush(stdout); | |
193 | continue; | |
194 | } | |
195 | if (c==EOF) | |
196 | ex(); | |
197 | } | |
198 | } | |
199 | ||
200 | execom() | |
201 | { | |
202 | int (*si)(), (*sq)(); | |
203 | ||
204 | if (fork() != 0) { | |
205 | si = signal(SIGINT, SIG_IGN); | |
206 | sq = signal(SIGQUIT, SIG_IGN); | |
207 | wait((int *)NULL); | |
208 | signal(SIGINT, si); | |
209 | signal(SIGQUIT, sq); | |
210 | return; | |
211 | } | |
212 | if (isatty(fileno(stdin)) == 0) { | |
213 | if (freopen("/dev/tty", "r", stdin)==NULL) | |
214 | freopen("/dev/null", "r", stdin); | |
215 | } | |
216 | execl("/bin/sh", "sh", "-t", 0); | |
217 | } | |
218 | ||
219 | sendpt(a) | |
220 | { | |
221 | register zz; | |
222 | int hy,xb,ly,hx,lx; | |
223 | ||
224 | if (a) | |
225 | return; | |
226 | if ((zz = yy) < 0) | |
227 | zz = 0; | |
228 | hy = ((zz>>7) & 037); | |
229 | xb = ((xx & 03) + ((zz<<2) & 014) & 017); | |
230 | ly = ((zz>>2) & 037); | |
231 | hx = ((xx>>7) & 037); | |
232 | lx = ((xx>>2) & 037); | |
233 | putchar(GS); | |
234 | if (hy != ohy) | |
235 | putchar(hy | 040); | |
236 | if (xb != oxb) | |
237 | putchar(xb | 0140); | |
238 | if ((ly != oly) || (hx != ohx) || (xb != oxb)) | |
239 | putchar(ly | 0140); | |
240 | if (hx != ohx) | |
241 | putchar(hx | 040); | |
242 | putchar(lx | 0100); | |
243 | ohy = hy; | |
244 | oxb = xb; | |
245 | oly = ly; | |
246 | ohx = hx; | |
247 | olx = lx; | |
248 | alpha = 0; | |
249 | } |