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1.1 root 1: /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
2: /* hack.termcap.c - version 1.0.3 */
3:
4: #include <stdio.h>
5: #include "config.h" /* for ROWNO and COLNO */
6: #include "def.flag.h" /* for flags.nonull */
7: extern char *tgetstr(), *tgoto(), *getenv();
8: extern long *alloc();
9:
10: #ifndef lint
11: extern /* it is defined in libtermlib (libtermcap) */
12: #endif lint
13: short ospeed; /* terminal baudrate; used by tputs */
14: static char tbuf[512];
15: static char *HO, *CL, *CE, *UP, *CM, *ND, *XD, *BC, *SO, *SE, *TI, *TE;
16: static char *VS, *VE;
17: static int SG;
18: static char PC = '\0';
19: char *CD; /* tested in pri.c: docorner() */
20: int CO, LI; /* used in pri.c and whatis.c */
21:
22: startup()
23: {
24: register char *term;
25: register char *tptr;
26: char *tbufptr, *pc;
27:
28: tptr = (char *) alloc(1024);
29:
30: tbufptr = tbuf;
31: if(!(term = getenv("TERM")))
32: error("Can't get TERM.");
33: if(!strncmp(term, "5620", 4))
34: flags.nonull = 1; /* this should be a termcap flag */
35: if(tgetent(tptr, term) < 1)
36: error("Unknown terminal type: %s.", term);
37: if(pc = tgetstr("pc", &tbufptr))
38: PC = *pc;
39: if(!(BC = tgetstr("bc", &tbufptr))) {
40: if(!tgetflag("bs"))
41: error("Terminal must backspace.");
42: BC = tbufptr;
43: tbufptr += 2;
44: *BC = '\b';
45: }
46: HO = tgetstr("ho", &tbufptr);
47: CO = tgetnum("co");
48: LI = tgetnum("li");
49: if(CO < COLNO || LI < ROWNO+2)
50: setclipped();
51: if(!(CL = tgetstr("cl", &tbufptr)))
52: error("Hack needs CL.");
53: ND = tgetstr("nd", &tbufptr);
54: if(tgetflag("os"))
55: error("Hack can't have OS.");
56: CE = tgetstr("ce", &tbufptr);
57: UP = tgetstr("up", &tbufptr);
58: /* It seems that xd is no longer supported, and we should use
59: a linefeed instead; unfortunately this requires resetting
60: CRMOD, and many output routines will have to be modified
61: slightly. Let's leave that till the next release. */
62: XD = tgetstr("xd", &tbufptr);
63: /* not: XD = tgetstr("do", &tbufptr); */
64: if(!(CM = tgetstr("cm", &tbufptr))) {
65: if(!UP && !HO)
66: error("Hack needs CM or UP or HO.");
67: printf("Playing hack on terminals without cm is suspect...\n");
68: getret();
69: }
70: SO = tgetstr("so", &tbufptr);
71: SE = tgetstr("se", &tbufptr);
72: SG = tgetnum("sg"); /* -1: not fnd; else # of spaces left by so */
73: if(!SO || !SE || (SG > 0)) SO = SE = 0;
74: CD = tgetstr("cd", &tbufptr);
75: set_whole_screen(); /* uses LI and CD */
76: if(tbufptr-tbuf > sizeof(tbuf)) error("TERMCAP entry too big...\n");
77: free(tptr);
78: }
79:
80: start_screen()
81: {
82: xputs(TI);
83: xputs(VS);
84: }
85:
86: end_screen()
87: {
88: xputs(VE);
89: xputs(TE);
90: }
91:
92: /* Cursor movements */
93: extern xchar curx, cury;
94:
95: curs(x, y)
96: register int x, y; /* not xchar: perhaps xchar is unsigned and
97: curx-x would be unsigned as well */
98: {
99:
100: if (y == cury && x == curx)
101: return;
102: if(!ND && (curx != x || x <= 3)) { /* Extremely primitive */
103: cmov(x, y); /* bunker!wtm */
104: return;
105: }
106: if(abs(cury-y) <= 3 && abs(curx-x) <= 3)
107: nocmov(x, y);
108: else if((x <= 3 && abs(cury-y)<= 3) || (!CM && x<abs(curx-x))) {
109: (void) putchar('\r');
110: curx = 1;
111: nocmov(x, y);
112: } else if(!CM) {
113: nocmov(x, y);
114: } else
115: cmov(x, y);
116: }
117:
118: nocmov(x, y)
119: {
120: if (cury > y) {
121: if(UP) {
122: while (cury > y) { /* Go up. */
123: xputs(UP);
124: cury--;
125: }
126: } else if(CM) {
127: cmov(x, y);
128: } else if(HO) {
129: home();
130: curs(x, y);
131: } /* else impossible("..."); */
132: } else if (cury < y) {
133: if(XD) {
134: while(cury < y) {
135: xputs(XD);
136: cury++;
137: }
138: } else if(CM) {
139: cmov(x, y);
140: } else {
141: while(cury < y) {
142: xputc('\n');
143: curx = 1;
144: cury++;
145: }
146: }
147: }
148: if (curx < x) { /* Go to the right. */
149: if(!ND) cmov(x, y); else /* bah */
150: /* should instead print what is there already */
151: while (curx < x) {
152: xputs(ND);
153: curx++;
154: }
155: } else if (curx > x) {
156: while (curx > x) { /* Go to the left. */
157: xputs(BC);
158: curx--;
159: }
160: }
161: }
162:
163: cmov(x, y)
164: register x, y;
165: {
166: xputs(tgoto(CM, x-1, y-1));
167: cury = y;
168: curx = x;
169: }
170:
171: xputc(c) char c; {
172: (void) fputc(c, stdout);
173: }
174:
175: xputs(s) char *s; {
176: tputs(s, 1, xputc);
177: }
178:
179: cl_end() {
180: if(CE)
181: xputs(CE);
182: else { /* no-CE fix - free after Harold Rynes */
183: /* this looks terrible, especially on a slow terminal
184: but is better than nothing */
185: register cx = curx, cy = cury;
186:
187: while(curx < COLNO) {
188: xputc(' ');
189: curx++;
190: }
191: curs(cx, cy);
192: }
193: }
194:
195: clear_screen() {
196: xputs(CL);
197: curx = cury = 1;
198: }
199:
200: home()
201: {
202: if(HO)
203: xputs(HO);
204: else if(CM)
205: xputs(tgoto(CM, 0, 0));
206: else
207: curs(1, 1); /* using UP ... */
208: curx = cury = 1;
209: }
210:
211: standoutbeg()
212: {
213: if(SO) xputs(SO);
214: }
215:
216: standoutend()
217: {
218: if(SE) xputs(SE);
219: }
220:
221: backsp()
222: {
223: xputs(BC);
224: curx--;
225: }
226:
227: bell()
228: {
229: (void) putchar('\007'); /* curx does not change */
230: (void) fflush(stdout);
231: }
232:
233: static short tmspc10[] = { /* from termcap */
234: 0, 2000, 1333, 909, 743, 666, 500, 333, 166, 83, 55, 41, 20, 10, 5
235: };
236:
237: delay_output() {
238: /* delay 50 ms - could also use a 'nap'-system call */
239: /* BUG: if the padding character is visible, as it is on the 5620
240: then this looks terrible. */
241: if(!flags.nonull)
242: tputs("50", 1, xputc);
243:
244: /* cbosgd!cbcephus!pds for SYS V R2 */
245: /* is this terminfo, or what? */
246: /* tputs("$<50>", 1, xputc); */
247:
248: else if(ospeed > 0 || ospeed < SIZE(tmspc10)) if(CM) {
249: /* delay by sending cm(here) an appropriate number of times */
250: register int cmlen = strlen(tgoto(CM, curx-1, cury-1));
251: register int i = 500 + tmspc10[ospeed]/2;
252:
253: while(i > 0) {
254: cmov(curx, cury);
255: i -= cmlen*tmspc10[ospeed];
256: }
257: }
258: }
259:
260: cl_eos() /* free after Robert Viduya */
261: { /* must only be called with curx = 1 */
262:
263: if(CD)
264: xputs(CD);
265: else {
266: register int cx = curx, cy = cury;
267: while(cury <= LI-2) {
268: cl_end();
269: xputc('\n');
270: curx = 1;
271: cury++;
272: }
273: cl_end();
274: curs(cx, cy);
275: }
276: }
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