xref: /freebsd/contrib/ncurses/ncurses/tinfo/lib_tputs.c (revision d0b2dbfa0ecf2bbc9709efc5e20baf8e4b44bbbf) 
1 /****************************************************************************
2  * Copyright 2018-2020,2021 Thomas E. Dickey                                *
3  * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
4  *                                                                          *
5  * Permission is hereby granted, free of charge, to any person obtaining a  *
6  * copy of this software and associated documentation files (the            *
7  * "Software"), to deal in the Software without restriction, including      *
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9  * distribute, distribute with modifications, sublicense, and/or sell       *
10  * copies of the Software, and to permit persons to whom the Software is    *
11  * furnished to do so, subject to the following conditions:                 *
12  *                                                                          *
13  * The above copyright notice and this permission notice shall be included  *
14  * in all copies or substantial portions of the Software.                   *
15  *                                                                          *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23  *                                                                          *
24  * Except as contained in this notice, the name(s) of the above copyright   *
25  * holders shall not be used in advertising or otherwise to promote the     *
26  * sale, use or other dealings in this Software without prior written       *
27  * authorization.                                                           *
28  ****************************************************************************/
29 
30 /****************************************************************************
31  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
32  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
33  *     and: Thomas E. Dickey                        1996-on                 *
34  *     and: Juergen Pfeifer                         2009                    *
35  ****************************************************************************/
36 
37 /*
38  *	tputs.c
39  *		delay_output()
40  *		_nc_outch()
41  *		tputs()
42  *
43  */
44 
45 #include <curses.priv.h>
46 
47 #ifndef CUR
48 #define CUR SP_TERMTYPE
49 #endif
50 
51 #include <ctype.h>
52 #include <termcap.h>		/* ospeed */
53 #include <tic.h>
54 
55 MODULE_ID("$Id: lib_tputs.c,v 1.107 2021/04/03 18:45:53 tom Exp $")
56 
57 NCURSES_EXPORT_VAR(char) PC = 0;              /* used by termcap library */
58 NCURSES_EXPORT_VAR(NCURSES_OSPEED) ospeed = 0;        /* used by termcap library */
59 
60 NCURSES_EXPORT_VAR(int) _nc_nulls_sent = 0;   /* used by 'tack' program */
61 
62 #if NCURSES_NO_PADDING
63 NCURSES_EXPORT(void)
64 _nc_set_no_padding(SCREEN *sp)
65 {
66     bool no_padding = (getenv("NCURSES_NO_PADDING") != 0);
67 
68     if (sp)
69 	sp->_no_padding = no_padding;
70     else
71 	_nc_prescreen._no_padding = no_padding;
72 
73     TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used",
74 				    GetNoPadding(sp) ? " not" : ""));
75 }
76 #endif
77 
78 #if NCURSES_SP_FUNCS
79 #define SetOutCh(func) if (SP_PARM) SP_PARM->_outch = func; else _nc_prescreen._outch = func
80 #define GetOutCh()     (SP_PARM ? SP_PARM->_outch : _nc_prescreen._outch)
81 #else
82 #define SetOutCh(func) static_outch = func
83 #define GetOutCh()     static_outch
84 static NCURSES_SP_OUTC static_outch = NCURSES_SP_NAME(_nc_outch);
85 #endif
86 
87 NCURSES_EXPORT(int)
88 NCURSES_SP_NAME(delay_output) (NCURSES_SP_DCLx int ms)
89 {
90     T((T_CALLED("delay_output(%p,%d)"), (void *) SP_PARM, ms));
91 
92     if (!HasTInfoTerminal(SP_PARM))
93 	returnCode(ERR);
94 
95     if (no_pad_char) {
96 	NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
97 	napms(ms);
98     } else {
99 	NCURSES_SP_OUTC my_outch = GetOutCh();
100 	register int nullcount;
101 
102 	nullcount = (ms * _nc_baudrate(ospeed)) / (BAUDBYTE * 1000);
103 	for (_nc_nulls_sent += nullcount; nullcount > 0; nullcount--)
104 	    my_outch(NCURSES_SP_ARGx PC);
105 	if (my_outch == NCURSES_SP_NAME(_nc_outch))
106 	    NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
107     }
108 
109     returnCode(OK);
110 }
111 
112 #if NCURSES_SP_FUNCS
113 NCURSES_EXPORT(int)
114 delay_output(int ms)
115 {
116     return NCURSES_SP_NAME(delay_output) (CURRENT_SCREEN, ms);
117 }
118 #endif
119 
120 NCURSES_EXPORT(void)
121 NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_DCL0)
122 {
123     T((T_CALLED("_nc_flush(%p)"), (void *) SP_PARM));
124     if (SP_PARM != 0 && SP_PARM->_ofd >= 0) {
125 	TR(TRACE_CHARPUT, ("ofd:%d inuse:%lu buffer:%p",
126 			   SP_PARM->_ofd,
127 			   (unsigned long) SP_PARM->out_inuse,
128 			   SP_PARM->out_buffer));
129 	if (SP_PARM->out_inuse) {
130 	    char *buf = SP_PARM->out_buffer;
131 	    size_t amount = SP->out_inuse;
132 
133 	    SP->out_inuse = 0;
134 	    TR(TRACE_CHARPUT, ("flushing %ld/%ld bytes",
135 			       (unsigned long) amount, _nc_outchars));
136 	    while (amount) {
137 		ssize_t res = write(SP_PARM->_ofd, buf, amount);
138 		if (res > 0) {
139 		    /* if the write was incomplete, try again */
140 		    amount -= (size_t) res;
141 		    buf += res;
142 		} else if (errno == EAGAIN) {
143 		    continue;
144 		} else if (errno == EINTR) {
145 		    continue;
146 		} else {
147 		    break;	/* an error we can not recover from */
148 		}
149 	    }
150 	} else if (SP_PARM->out_buffer == 0) {
151 	    TR(TRACE_CHARPUT, ("flushing stdout"));
152 	    fflush(stdout);
153 	}
154     } else {
155 	TR(TRACE_CHARPUT, ("flushing stdout"));
156 	fflush(stdout);
157     }
158     returnVoid;
159 }
160 
161 #if NCURSES_SP_FUNCS
162 NCURSES_EXPORT(void)
163 _nc_flush(void)
164 {
165     NCURSES_SP_NAME(_nc_flush) (CURRENT_SCREEN);
166 }
167 #endif
168 
169 NCURSES_EXPORT(int)
170 NCURSES_SP_NAME(_nc_outch) (NCURSES_SP_DCLx int ch)
171 {
172     int rc = OK;
173 
174     COUNT_OUTCHARS(1);
175 
176     if (HasTInfoTerminal(SP_PARM)
177 	&& SP_PARM != 0) {
178 	if (SP_PARM->out_buffer != 0) {
179 	    if (SP_PARM->out_inuse + 1 >= SP_PARM->out_limit)
180 		NCURSES_SP_NAME(_nc_flush) (NCURSES_SP_ARG);
181 	    SP_PARM->out_buffer[SP_PARM->out_inuse++] = (char) ch;
182 	} else {
183 	    char tmp = (char) ch;
184 	    /*
185 	     * POSIX says write() is safe in a signal handler, but the
186 	     * buffered I/O is not.
187 	     */
188 	    if (write(fileno(NC_OUTPUT(SP_PARM)), &tmp, (size_t) 1) == -1)
189 		rc = ERR;
190 	}
191     } else {
192 	char tmp = (char) ch;
193 	if (write(fileno(stdout), &tmp, (size_t) 1) == -1)
194 	    rc = ERR;
195     }
196     return rc;
197 }
198 
199 #if NCURSES_SP_FUNCS
200 NCURSES_EXPORT(int)
201 _nc_outch(int ch)
202 {
203     return NCURSES_SP_NAME(_nc_outch) (CURRENT_SCREEN, ch);
204 }
205 #endif
206 
207 /*
208  * This is used for the putp special case.
209  */
210 NCURSES_EXPORT(int)
211 NCURSES_SP_NAME(_nc_putchar) (NCURSES_SP_DCLx int ch)
212 {
213     (void) SP_PARM;
214     return putchar(ch);
215 }
216 
217 #if NCURSES_SP_FUNCS
218 NCURSES_EXPORT(int)
219 _nc_putchar(int ch)
220 {
221     return putchar(ch);
222 }
223 #endif
224 
225 /*
226  * putp is special - per documentation it calls tputs with putchar as the
227  * parameter for outputting characters.  This means that it uses stdio, which
228  * is not signal-safe.  Applications call this entrypoint; we do not call it
229  * from within the library.
230  */
231 NCURSES_EXPORT(int)
232 NCURSES_SP_NAME(putp) (NCURSES_SP_DCLx const char *string)
233 {
234     return NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
235 				   string, 1, NCURSES_SP_NAME(_nc_putchar));
236 }
237 
238 #if NCURSES_SP_FUNCS
239 NCURSES_EXPORT(int)
240 putp(const char *string)
241 {
242     return NCURSES_SP_NAME(putp) (CURRENT_SCREEN, string);
243 }
244 #endif
245 
246 /*
247  * Use these entrypoints rather than "putp" within the library.
248  */
249 NCURSES_EXPORT(int)
250 NCURSES_SP_NAME(_nc_putp) (NCURSES_SP_DCLx
251 			   const char *name GCC_UNUSED,
252 			   const char *string)
253 {
254     int rc = ERR;
255 
256     if (string != 0) {
257 	TPUTS_TRACE(name);
258 	rc = NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
259 				     string, 1, NCURSES_SP_NAME(_nc_outch));
260     }
261     return rc;
262 }
263 
264 #if NCURSES_SP_FUNCS
265 NCURSES_EXPORT(int)
266 _nc_putp(const char *name, const char *string)
267 {
268     return NCURSES_SP_NAME(_nc_putp) (CURRENT_SCREEN, name, string);
269 }
270 #endif
271 
272 NCURSES_EXPORT(int)
273 NCURSES_SP_NAME(tputs) (NCURSES_SP_DCLx
274 			const char *string,
275 			int affcnt,
276 			NCURSES_SP_OUTC outc)
277 {
278     NCURSES_SP_OUTC my_outch = GetOutCh();
279     bool always_delay;
280     bool normal_delay;
281     int number;
282 #if BSD_TPUTS
283     int trailpad;
284 #endif /* BSD_TPUTS */
285 
286 #ifdef TRACE
287     if (USE_TRACEF(TRACE_TPUTS)) {
288 	char addrbuf[32];
289 	TR_FUNC_BFR(1);
290 
291 	if (outc == NCURSES_SP_NAME(_nc_outch)) {
292 	    _nc_STRCPY(addrbuf, "_nc_outch", sizeof(addrbuf));
293 	} else {
294 	    _nc_SPRINTF(addrbuf, _nc_SLIMIT(sizeof(addrbuf)) "%s",
295 			TR_FUNC_ARG(0, outc));
296 	}
297 	if (_nc_tputs_trace) {
298 	    _tracef("tputs(%s = %s, %d, %s) called", _nc_tputs_trace,
299 		    _nc_visbuf(string), affcnt, addrbuf);
300 	} else {
301 	    _tracef("tputs(%s, %d, %s) called", _nc_visbuf(string), affcnt, addrbuf);
302 	}
303 	TPUTS_TRACE(NULL);
304 	_nc_unlock_global(tracef);
305     }
306 #endif /* TRACE */
307 
308     if (SP_PARM != 0 && !HasTInfoTerminal(SP_PARM))
309 	return ERR;
310 
311     if (!VALID_STRING(string))
312 	return ERR;
313 
314     if (
315 #if NCURSES_SP_FUNCS
316 	   (SP_PARM != 0 && SP_PARM->_term == 0)
317 #else
318 	   cur_term == 0
319 #endif
320 	) {
321 	always_delay = FALSE;
322 	normal_delay = TRUE;
323     } else {
324 	always_delay = (string == bell) || (string == flash_screen);
325 	normal_delay =
326 	    !xon_xoff
327 	    && padding_baud_rate
328 #if NCURSES_NO_PADDING
329 	    && !GetNoPadding(SP_PARM)
330 #endif
331 	    && (_nc_baudrate(ospeed) >= padding_baud_rate);
332     }
333 
334 #if BSD_TPUTS
335     /*
336      * This ugly kluge deals with the fact that some ancient BSD programs
337      * (like nethack) actually do the likes of tputs("50") to get delays.
338      */
339     trailpad = 0;
340     if (isdigit(UChar(*string))) {
341 	while (isdigit(UChar(*string))) {
342 	    trailpad = trailpad * 10 + (*string - '0');
343 	    string++;
344 	}
345 	trailpad *= 10;
346 	if (*string == '.') {
347 	    string++;
348 	    if (isdigit(UChar(*string))) {
349 		trailpad += (*string - '0');
350 		string++;
351 	    }
352 	    while (isdigit(UChar(*string)))
353 		string++;
354 	}
355 
356 	if (*string == '*') {
357 	    trailpad *= affcnt;
358 	    string++;
359 	}
360     }
361 #endif /* BSD_TPUTS */
362 
363     SetOutCh(outc);		/* redirect delay_output() */
364     while (*string) {
365 	if (*string != '$')
366 	    (*outc) (NCURSES_SP_ARGx *string);
367 	else {
368 	    string++;
369 	    if (*string != '<') {
370 		(*outc) (NCURSES_SP_ARGx '$');
371 		if (*string)
372 		    (*outc) (NCURSES_SP_ARGx *string);
373 	    } else {
374 		bool mandatory;
375 
376 		string++;
377 		if ((!isdigit(UChar(*string)) && *string != '.')
378 		    || !strchr(string, '>')) {
379 		    (*outc) (NCURSES_SP_ARGx '$');
380 		    (*outc) (NCURSES_SP_ARGx '<');
381 		    continue;
382 		}
383 
384 		number = 0;
385 		while (isdigit(UChar(*string))) {
386 		    number = number * 10 + (*string - '0');
387 		    string++;
388 		}
389 		number *= 10;
390 		if (*string == '.') {
391 		    string++;
392 		    if (isdigit(UChar(*string))) {
393 			number += (*string - '0');
394 			string++;
395 		    }
396 		    while (isdigit(UChar(*string)))
397 			string++;
398 		}
399 
400 		mandatory = FALSE;
401 		while (*string == '*' || *string == '/') {
402 		    if (*string == '*') {
403 			number *= affcnt;
404 			string++;
405 		    } else {	/* if (*string == '/') */
406 			mandatory = TRUE;
407 			string++;
408 		    }
409 		}
410 
411 		if (number > 0
412 		    && (always_delay
413 			|| normal_delay
414 			|| mandatory))
415 		    NCURSES_SP_NAME(delay_output) (NCURSES_SP_ARGx number / 10);
416 
417 	    }			/* endelse (*string == '<') */
418 	}			/* endelse (*string == '$') */
419 
420 	if (*string == '\0')
421 	    break;
422 
423 	string++;
424     }
425 
426 #if BSD_TPUTS
427     /*
428      * Emit any BSD-style prefix padding that we've accumulated now.
429      */
430     if (trailpad > 0
431 	&& (always_delay || normal_delay))
432 	NCURSES_SP_NAME(delay_output) (NCURSES_SP_ARGx trailpad / 10);
433 #endif /* BSD_TPUTS */
434 
435     SetOutCh(my_outch);
436     return OK;
437 }
438 
439 #if NCURSES_SP_FUNCS
440 NCURSES_EXPORT(int)
441 _nc_outc_wrapper(SCREEN *sp, int c)
442 {
443     if (0 == sp) {
444 	return fputc(c, stdout);
445     } else {
446 	return sp->jump(c);
447     }
448 }
449 
450 NCURSES_EXPORT(int)
451 tputs(const char *string, int affcnt, int (*outc) (int))
452 {
453     SetSafeOutcWrapper(outc);
454     return NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx string, affcnt, _nc_outc_wrapper);
455 }
456 #endif
457