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2  * Copyright (c) 1998-2006,2008 Free Software Foundation, Inc.              *
3  *                                                                          *
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5  * copy of this software and associated documentation files (the            *
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10  * furnished to do so, subject to the following conditions:                 *
11  *                                                                          *
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14  *                                                                          *
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19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
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22  *                                                                          *
23  * Except as contained in this notice, the name(s) of the above copyright   *
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26  * authorization.                                                           *
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28 
29 /****************************************************************************
30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32  *     and: Thomas E. Dickey                        1996-on                 *
33  ****************************************************************************/
34 
35 /*
36  *	captoinfo.c --- conversion between termcap and terminfo formats
37  *
38  *	The captoinfo() code was swiped from Ross Ridge's mytinfo package,
39  *	adapted to fit ncurses by Eric S. Raymond <esr@snark.thyrsus.com>.
40  *
41  *	There is just one entry point:
42  *
43  *	char *_nc_captoinfo(n, s, parameterized)
44  *
45  *	Convert value s for termcap string capability named n into terminfo
46  *	format.
47  *
48  *	This code recognizes all the standard 4.4BSD %-escapes:
49  *
50  *	%%       output `%'
51  *	%d       output value as in printf %d
52  *	%2       output value as in printf %2d
53  *	%3       output value as in printf %3d
54  *	%.       output value as in printf %c
55  *	%+x      add x to value, then do %.
56  *	%>xy     if value > x then add y, no output
57  *	%r       reverse order of two parameters, no output
58  *	%i       increment by one, no output
59  *	%n       exclusive-or all parameters with 0140 (Datamedia 2500)
60  *	%B       BCD (16*(value/10)) + (value%10), no output
61  *	%D       Reverse coding (value - 2*(value%16)), no output (Delta Data).
62  *
63  *	Also, %02 and %03 are accepted as synonyms for %2 and %3.
64  *
65  *	Besides all the standard termcap escapes, this translator understands
66  *	the following extended escapes:
67  *
68  *	used by GNU Emacs termcap libraries
69  *		%a[+*-/=][cp]x	GNU arithmetic.
70  *		%m		xor the first two parameters by 0177
71  *		%b		backup to previous parameter
72  *		%f		skip this parameter
73  *
74  *	used by the University of Waterloo (MFCF) termcap libraries
75  *		%-x	 subtract parameter FROM char x and output it as a char
76  *		%ax	 add the character x to parameter
77  *
78  *	If #define WATERLOO is on, also enable these translations:
79  *
80  *		%sx	 subtract parameter FROM the character x
81  *
82  *	By default, this Waterloo translations are not compiled in, because
83  *	the Waterloo %s conflicts with the way terminfo uses %s in strings for
84  *	function programming.
85  *
86  *	Note the two definitions of %a: the GNU definition is translated if the
87  *	characters after the 'a' are valid for it, otherwise the UW definition
88  *	is translated.
89  */
90 
91 #include <curses.priv.h>
92 
93 #include <ctype.h>
94 #include <tic.h>
95 
96 MODULE_ID("$Id: captoinfo.c,v 1.52 2008/08/16 19:24:51 tom Exp $")
97 
98 #define MAX_PUSHED	16	/* max # args we can push onto the stack */
99 
100 static int stack[MAX_PUSHED];	/* the stack */
101 static int stackptr;		/* the next empty place on the stack */
102 static int onstack;		/* the top of stack */
103 static int seenm;		/* seen a %m */
104 static int seenn;		/* seen a %n */
105 static int seenr;		/* seen a %r */
106 static int param;		/* current parameter */
107 static char *dp;		/* pointer to end of the converted string */
108 
109 static char *my_string;
110 static size_t my_length;
111 
112 static char *
113 init_string(void)
114 /* initialize 'my_string', 'my_length' */
115 {
116     if (my_string == 0)
117 	my_string = typeMalloc(char, my_length = 256);
118     if (my_string == 0)
119 	_nc_err_abort(MSG_NO_MEMORY);
120 
121     *my_string = '\0';
122     return my_string;
123 }
124 
125 static char *
126 save_string(char *d, const char *const s)
127 {
128     size_t have = (d - my_string);
129     size_t need = have + strlen(s) + 2;
130     if (need > my_length) {
131 	my_string = (char *) realloc(my_string, my_length = (need + need));
132 	if (my_string == 0)
133 	    _nc_err_abort(MSG_NO_MEMORY);
134 	d = my_string + have;
135     }
136     (void) strcpy(d, s);
137     return d + strlen(d);
138 }
139 
140 static NCURSES_INLINE char *
141 save_char(char *s, int c)
142 {
143     static char temp[2];
144     temp[0] = (char) c;
145     return save_string(s, temp);
146 }
147 
148 static void
149 push(void)
150 /* push onstack on to the stack */
151 {
152     if (stackptr >= MAX_PUSHED)
153 	_nc_warning("string too complex to convert");
154     else
155 	stack[stackptr++] = onstack;
156 }
157 
158 static void
159 pop(void)
160 /* pop the top of the stack into onstack */
161 {
162     if (stackptr == 0) {
163 	if (onstack == 0)
164 	    _nc_warning("I'm confused");
165 	else
166 	    onstack = 0;
167     } else
168 	onstack = stack[--stackptr];
169     param++;
170 }
171 
172 static int
173 cvtchar(register const char *sp)
174 /* convert a character to a terminfo push */
175 {
176     unsigned char c = 0;
177     int len;
178 
179     switch (*sp) {
180     case '\\':
181 	switch (*++sp) {
182 	case '\'':
183 	case '$':
184 	case '\\':
185 	case '%':
186 	    c = (unsigned char) (*sp);
187 	    len = 2;
188 	    break;
189 	case '\0':
190 	    c = '\\';
191 	    len = 1;
192 	    break;
193 	case '0':
194 	case '1':
195 	case '2':
196 	case '3':
197 	    len = 1;
198 	    while (isdigit(UChar(*sp))) {
199 		c = 8 * c + (*sp++ - '0');
200 		len++;
201 	    }
202 	    break;
203 	default:
204 	    c = (unsigned char) (*sp);
205 	    len = 2;
206 	    break;
207 	}
208 	break;
209     case '^':
210 	c = (*++sp & 0x1f);
211 	len = 2;
212 	break;
213     default:
214 	c = (unsigned char) (*sp);
215 	len = 1;
216     }
217     if (isgraph(c) && c != ',' && c != '\'' && c != '\\' && c != ':') {
218 	dp = save_string(dp, "%\'");
219 	dp = save_char(dp, c);
220 	dp = save_char(dp, '\'');
221     } else {
222 	dp = save_string(dp, "%{");
223 	if (c > 99)
224 	    dp = save_char(dp, c / 100 + '0');
225 	if (c > 9)
226 	    dp = save_char(dp, ((int) (c / 10)) % 10 + '0');
227 	dp = save_char(dp, c % 10 + '0');
228 	dp = save_char(dp, '}');
229     }
230     return len;
231 }
232 
233 static void
234 getparm(int parm, int n)
235 /* push n copies of param on the terminfo stack if not already there */
236 {
237     if (seenr) {
238 	if (parm == 1)
239 	    parm = 2;
240 	else if (parm == 2)
241 	    parm = 1;
242     }
243     if (onstack == parm) {
244 	if (n > 1) {
245 	    _nc_warning("string may not be optimal");
246 	    dp = save_string(dp, "%Pa");
247 	    while (n--) {
248 		dp = save_string(dp, "%ga");
249 	    }
250 	}
251 	return;
252     }
253     if (onstack != 0)
254 	push();
255 
256     onstack = parm;
257 
258     while (n--) {
259 	dp = save_string(dp, "%p");
260 	dp = save_char(dp, '0' + parm);
261     }
262 
263     if (seenn && parm < 3) {
264 	dp = save_string(dp, "%{96}%^");
265     }
266 
267     if (seenm && parm < 3) {
268 	dp = save_string(dp, "%{127}%^");
269     }
270 }
271 
272 /*
273  * Convert a termcap string to terminfo format.
274  * 'cap' is the relevant terminfo capability index.
275  * 's' is the string value of the capability.
276  * 'parameterized' tells what type of translations to do:
277  *	% translations if 1
278  *	pad translations if >=0
279  */
280 NCURSES_EXPORT(char *)
281 _nc_captoinfo(const char *cap, const char *s, int const parameterized)
282 {
283     const char *capstart;
284 
285     stackptr = 0;
286     onstack = 0;
287     seenm = 0;
288     seenn = 0;
289     seenr = 0;
290     param = 1;
291 
292     dp = init_string();
293 
294     /* skip the initial padding (if we haven't been told not to) */
295     capstart = 0;
296     if (s == 0)
297 	s = "";
298     if (parameterized >= 0 && isdigit(UChar(*s)))
299 	for (capstart = s;; s++)
300 	    if (!(isdigit(UChar(*s)) || *s == '*' || *s == '.'))
301 		break;
302 
303     while (*s != '\0') {
304 	switch (*s) {
305 	case '%':
306 	    s++;
307 	    if (parameterized < 1) {
308 		dp = save_char(dp, '%');
309 		break;
310 	    }
311 	    switch (*s++) {
312 	    case '%':
313 		dp = save_char(dp, '%');
314 		break;
315 	    case 'r':
316 		if (seenr++ == 1) {
317 		    _nc_warning("saw %%r twice in %s", cap);
318 		}
319 		break;
320 	    case 'm':
321 		if (seenm++ == 1) {
322 		    _nc_warning("saw %%m twice in %s", cap);
323 		}
324 		break;
325 	    case 'n':
326 		if (seenn++ == 1) {
327 		    _nc_warning("saw %%n twice in %s", cap);
328 		}
329 		break;
330 	    case 'i':
331 		dp = save_string(dp, "%i");
332 		break;
333 	    case '6':
334 	    case 'B':
335 		getparm(param, 1);
336 		dp = save_string(dp, "%{10}%/%{16}%*");
337 		getparm(param, 1);
338 		dp = save_string(dp, "%{10}%m%+");
339 		break;
340 	    case '8':
341 	    case 'D':
342 		getparm(param, 2);
343 		dp = save_string(dp, "%{2}%*%-");
344 		break;
345 	    case '>':
346 		getparm(param, 2);
347 		/* %?%{x}%>%t%{y}%+%; */
348 		dp = save_string(dp, "%?");
349 		s += cvtchar(s);
350 		dp = save_string(dp, "%>%t");
351 		s += cvtchar(s);
352 		dp = save_string(dp, "%+%;");
353 		break;
354 	    case 'a':
355 		if ((*s == '=' || *s == '+' || *s == '-'
356 		     || *s == '*' || *s == '/')
357 		    && (s[1] == 'p' || s[1] == 'c')
358 		    && s[2] != '\0') {
359 		    int l;
360 		    l = 2;
361 		    if (*s != '=')
362 			getparm(param, 1);
363 		    if (s[1] == 'p') {
364 			getparm(param + s[2] - '@', 1);
365 			if (param != onstack) {
366 			    pop();
367 			    param--;
368 			}
369 			l++;
370 		    } else
371 			l += cvtchar(s + 2);
372 		    switch (*s) {
373 		    case '+':
374 			dp = save_string(dp, "%+");
375 			break;
376 		    case '-':
377 			dp = save_string(dp, "%-");
378 			break;
379 		    case '*':
380 			dp = save_string(dp, "%*");
381 			break;
382 		    case '/':
383 			dp = save_string(dp, "%/");
384 			break;
385 		    case '=':
386 			if (seenr) {
387 			    if (param == 1)
388 				onstack = 2;
389 			    else if (param == 2)
390 				onstack = 1;
391 			    else
392 				onstack = param;
393 			} else
394 			    onstack = param;
395 			break;
396 		    }
397 		    s += l;
398 		    break;
399 		}
400 		getparm(param, 1);
401 		s += cvtchar(s);
402 		dp = save_string(dp, "%+");
403 		break;
404 	    case '+':
405 		getparm(param, 1);
406 		s += cvtchar(s);
407 		dp = save_string(dp, "%+%c");
408 		pop();
409 		break;
410 	    case 's':
411 #ifdef WATERLOO
412 		s += cvtchar(s);
413 		getparm(param, 1);
414 		dp = save_string(dp, "%-");
415 #else
416 		getparm(param, 1);
417 		dp = save_string(dp, "%s");
418 		pop();
419 #endif /* WATERLOO */
420 		break;
421 	    case '-':
422 		s += cvtchar(s);
423 		getparm(param, 1);
424 		dp = save_string(dp, "%-%c");
425 		pop();
426 		break;
427 	    case '.':
428 		getparm(param, 1);
429 		dp = save_string(dp, "%c");
430 		pop();
431 		break;
432 	    case '0':		/* not clear any of the historical termcaps did this */
433 		if (*s == '3')
434 		    goto see03;
435 		else if (*s != '2')
436 		    goto invalid;
437 		/* FALLTHRU */
438 	    case '2':
439 		getparm(param, 1);
440 		dp = save_string(dp, "%2d");
441 		pop();
442 		break;
443 	    case '3':
444 	      see03:
445 		getparm(param, 1);
446 		dp = save_string(dp, "%3d");
447 		pop();
448 		break;
449 	    case 'd':
450 		getparm(param, 1);
451 		dp = save_string(dp, "%d");
452 		pop();
453 		break;
454 	    case 'f':
455 		param++;
456 		break;
457 	    case 'b':
458 		param--;
459 		break;
460 	    case '\\':
461 		dp = save_string(dp, "%\\");
462 		break;
463 	    default:
464 	      invalid:
465 		dp = save_char(dp, '%');
466 		s--;
467 		_nc_warning("unknown %% code %s (%#x) in %s",
468 			    unctrl((chtype) *s), UChar(*s), cap);
469 		break;
470 	    }
471 	    break;
472 #ifdef REVISIBILIZE
473 	case '\\':
474 	    dp = save_char(dp, *s++);
475 	    dp = save_char(dp, *s++);
476 	    break;
477 	case '\n':
478 	    dp = save_string(dp, "\\n");
479 	    s++;
480 	    break;
481 	case '\t':
482 	    dp = save_string(dp, "\\t");
483 	    s++;
484 	    break;
485 	case '\r':
486 	    dp = save_string(dp, "\\r");
487 	    s++;
488 	    break;
489 	case '\200':
490 	    dp = save_string(dp, "\\0");
491 	    s++;
492 	    break;
493 	case '\f':
494 	    dp = save_string(dp, "\\f");
495 	    s++;
496 	    break;
497 	case '\b':
498 	    dp = save_string(dp, "\\b");
499 	    s++;
500 	    break;
501 	case ' ':
502 	    dp = save_string(dp, "\\s");
503 	    s++;
504 	    break;
505 	case '^':
506 	    dp = save_string(dp, "\\^");
507 	    s++;
508 	    break;
509 	case ':':
510 	    dp = save_string(dp, "\\:");
511 	    s++;
512 	    break;
513 	case ',':
514 	    dp = save_string(dp, "\\,");
515 	    s++;
516 	    break;
517 	default:
518 	    if (*s == '\033') {
519 		dp = save_string(dp, "\\E");
520 		s++;
521 	    } else if (*s > 0 && *s < 32) {
522 		dp = save_char(dp, '^');
523 		dp = save_char(dp, *s + '@');
524 		s++;
525 	    } else if (*s <= 0 || *s >= 127) {
526 		dp = save_char(dp, '\\');
527 		dp = save_char(dp, ((*s & 0300) >> 6) + '0');
528 		dp = save_char(dp, ((*s & 0070) >> 3) + '0');
529 		dp = save_char(dp, (*s & 0007) + '0');
530 		s++;
531 	    } else
532 		dp = save_char(dp, *s++);
533 	    break;
534 #else
535 	default:
536 	    dp = save_char(dp, *s++);
537 	    break;
538 #endif
539 	}
540     }
541 
542     /*
543      * Now, if we stripped off some leading padding, add it at the end
544      * of the string as mandatory padding.
545      */
546     if (capstart) {
547 	dp = save_string(dp, "$<");
548 	for (s = capstart;; s++)
549 	    if (isdigit(UChar(*s)) || *s == '*' || *s == '.')
550 		dp = save_char(dp, *s);
551 	    else
552 		break;
553 	dp = save_string(dp, "/>");
554     }
555 
556     (void) save_char(dp, '\0');
557     return (my_string);
558 }
559 
560 /*
561  * Check for an expression that corresponds to "%B" (BCD):
562  *	(parameter / 10) * 16 + (parameter % 10)
563  */
564 static int
565 bcd_expression(const char *str)
566 {
567     /* leave this non-const for HPUX */
568     static char fmt[] = "%%p%c%%{10}%%/%%{16}%%*%%p%c%%{10}%%m%%+";
569     int len = 0;
570     char ch1, ch2;
571 
572     if (sscanf(str, fmt, &ch1, &ch2) == 2
573 	&& isdigit(UChar(ch1))
574 	&& isdigit(UChar(ch2))
575 	&& (ch1 == ch2)) {
576 	len = 28;
577 #ifndef NDEBUG
578 	{
579 	    char buffer[80];
580 	    int tst;
581 	    sprintf(buffer, fmt, ch1, ch2);
582 	    tst = strlen(buffer) - 1;
583 	    assert(len == tst);
584 	}
585 #endif
586     }
587     return len;
588 }
589 
590 static char *
591 save_tc_char(char *bufptr, int c1)
592 {
593     char temp[80];
594 
595     if (is7bits(c1) && isprint(c1)) {
596 	if (c1 == ':' || c1 == '\\')
597 	    bufptr = save_char(bufptr, '\\');
598 	bufptr = save_char(bufptr, c1);
599     } else {
600 	if (c1 == (c1 & 0x1f))	/* iscntrl() returns T on 255 */
601 	    (void) strcpy(temp, unctrl((chtype) c1));
602 	else
603 	    (void) sprintf(temp, "\\%03o", c1);
604 	bufptr = save_string(bufptr, temp);
605     }
606     return bufptr;
607 }
608 
609 static char *
610 save_tc_inequality(char *bufptr, int c1, int c2)
611 {
612     bufptr = save_string(bufptr, "%>");
613     bufptr = save_tc_char(bufptr, c1);
614     bufptr = save_tc_char(bufptr, c2);
615     return bufptr;
616 }
617 
618 /*
619  * Here are the capabilities infotocap assumes it can translate to:
620  *
621  *     %%       output `%'
622  *     %d       output value as in printf %d
623  *     %2       output value as in printf %2d
624  *     %3       output value as in printf %3d
625  *     %.       output value as in printf %c
626  *     %+c      add character c to value, then do %.
627  *     %>xy     if value > x then add y, no output
628  *     %r       reverse order of two parameters, no output
629  *     %i       increment by one, no output
630  *     %n       exclusive-or all parameters with 0140 (Datamedia 2500)
631  *     %B       BCD (16*(value/10)) + (value%10), no output
632  *     %D       Reverse coding (value - 2*(value%16)), no output (Delta Data).
633  *     %m       exclusive-or all parameters with 0177 (not in 4.4BSD)
634  */
635 
636 /*
637  * Convert a terminfo string to termcap format.  Parameters are as in
638  * _nc_captoinfo().
639  */
640 NCURSES_EXPORT(char *)
641 _nc_infotocap(const char *cap GCC_UNUSED, const char *str, int const parameterized)
642 {
643     int seenone = 0, seentwo = 0, saw_m = 0, saw_n = 0;
644     const char *padding;
645     const char *trimmed = 0;
646     char ch1 = 0, ch2 = 0;
647     char *bufptr = init_string();
648     int len;
649     bool syntax_error = FALSE;
650 
651     /* we may have to move some trailing mandatory padding up front */
652     padding = str + strlen(str) - 1;
653     if (padding > str && *padding == '>' && *--padding == '/') {
654 	--padding;
655 	while (isdigit(UChar(*padding)) || *padding == '.' || *padding == '*')
656 	    padding--;
657 	if (padding > str && *padding == '<' && *--padding == '$')
658 	    trimmed = padding;
659 	padding += 2;
660 
661 	while (isdigit(UChar(*padding)) || *padding == '.' || *padding == '*')
662 	    bufptr = save_char(bufptr, *padding++);
663     }
664 
665     for (; *str && str != trimmed; str++) {
666 	int c1, c2;
667 	char *cp = 0;
668 
669 	if (str[0] == '\\' && (str[1] == '^' || str[1] == ',')) {
670 	    bufptr = save_char(bufptr, *++str);
671 	} else if (str[0] == '$' && str[1] == '<') {	/* discard padding */
672 	    str += 2;
673 	    while (isdigit(UChar(*str))
674 		   || *str == '.'
675 		   || *str == '*'
676 		   || *str == '/'
677 		   || *str == '>')
678 		str++;
679 	    --str;
680 	} else if (str[0] == '%' && str[1] == '%') {	/* escaped '%' */
681 	    bufptr = save_string(bufptr, "%%");
682 	    ++str;
683 	} else if (*str != '%' || (parameterized < 1)) {
684 	    bufptr = save_char(bufptr, *str);
685 	} else if (sscanf(str, "%%?%%{%d}%%>%%t%%{%d}%%+%%;", &c1, &c2) == 2) {
686 	    str = strchr(str, ';');
687 	    bufptr = save_tc_inequality(bufptr, c1, c2);
688 	} else if (sscanf(str, "%%?%%{%d}%%>%%t%%'%c'%%+%%;", &c1, &ch2) == 2) {
689 	    str = strchr(str, ';');
690 	    bufptr = save_tc_inequality(bufptr, c1, c2);
691 	} else if (sscanf(str, "%%?%%'%c'%%>%%t%%{%d}%%+%%;", &ch1, &c2) == 2) {
692 	    str = strchr(str, ';');
693 	    bufptr = save_tc_inequality(bufptr, c1, c2);
694 	} else if (sscanf(str, "%%?%%'%c'%%>%%t%%'%c'%%+%%;", &ch1, &ch2) == 2) {
695 	    str = strchr(str, ';');
696 	    bufptr = save_tc_inequality(bufptr, c1, c2);
697 	} else if ((len = bcd_expression(str)) != 0) {
698 	    str += len;
699 	    bufptr = save_string(bufptr, "%B");
700 	} else if ((sscanf(str, "%%{%d}%%+%%c", &c1) == 1
701 		    || sscanf(str, "%%'%c'%%+%%c", &ch1) == 1)
702 		   && (cp = strchr(str, '+'))) {
703 	    str = cp + 2;
704 	    bufptr = save_string(bufptr, "%+");
705 
706 	    if (ch1)
707 		c1 = ch1;
708 	    bufptr = save_tc_char(bufptr, c1);
709 	}
710 	/* FIXME: this "works" for 'delta' */
711 	else if (strncmp(str, "%{2}%*%-", 8) == 0) {
712 	    str += 7;
713 	    bufptr = save_string(bufptr, "%D");
714 	} else if (strncmp(str, "%{96}%^", 7) == 0) {
715 	    str += 6;
716 	    if (saw_m++ == 0) {
717 		bufptr = save_string(bufptr, "%n");
718 	    }
719 	} else if (strncmp(str, "%{127}%^", 8) == 0) {
720 	    str += 7;
721 	    if (saw_n++ == 0) {
722 		bufptr = save_string(bufptr, "%m");
723 	    }
724 	} else {		/* cm-style format element */
725 	    str++;
726 	    switch (*str) {
727 	    case '%':
728 		bufptr = save_char(bufptr, '%');
729 		break;
730 
731 	    case '0':
732 	    case '1':
733 	    case '2':
734 	    case '3':
735 	    case '4':
736 	    case '5':
737 	    case '6':
738 	    case '7':
739 	    case '8':
740 	    case '9':
741 		bufptr = save_char(bufptr, '%');
742 		while (isdigit(UChar(*str)))
743 		    bufptr = save_char(bufptr, *str++);
744 		if (strchr("doxX.", *str)) {
745 		    if (*str != 'd')	/* termcap doesn't have octal, hex */
746 			return 0;
747 		}
748 		break;
749 
750 	    case 'd':
751 		bufptr = save_string(bufptr, "%d");
752 		break;
753 
754 	    case 'c':
755 		bufptr = save_string(bufptr, "%.");
756 		break;
757 
758 		/*
759 		 * %s isn't in termcap, but it's convenient to pass it through
760 		 * so we can represent things like terminfo pfkey strings in
761 		 * termcap notation.
762 		 */
763 	    case 's':
764 		bufptr = save_string(bufptr, "%s");
765 		break;
766 
767 	    case 'p':
768 		str++;
769 		if (*str == '1')
770 		    seenone = 1;
771 		else if (*str == '2') {
772 		    if (!seenone && !seentwo) {
773 			bufptr = save_string(bufptr, "%r");
774 			seentwo++;
775 		    }
776 		} else if (*str >= '3')
777 		    return (0);
778 		break;
779 
780 	    case 'i':
781 		bufptr = save_string(bufptr, "%i");
782 		break;
783 
784 	    default:
785 		bufptr = save_char(bufptr, *str);
786 		syntax_error = TRUE;
787 		break;
788 	    }			/* endswitch (*str) */
789 	}			/* endelse (*str == '%') */
790 
791 	/*
792 	 * 'str' always points to the end of what was scanned in this step,
793 	 * but that may not be the end of the string.
794 	 */
795 	assert(str != 0);
796 	if (*str == '\0')
797 	    break;
798 
799     }				/* endwhile (*str) */
800 
801     return (syntax_error ? NULL : my_string);
802 }
803 
804 #ifdef MAIN
805 
806 int curr_line;
807 
808 int
809 main(int argc, char *argv[])
810 {
811     int c, tc = FALSE;
812 
813     while ((c = getopt(argc, argv, "c")) != EOF)
814 	switch (c) {
815 	case 'c':
816 	    tc = TRUE;
817 	    break;
818 	}
819 
820     curr_line = 0;
821     for (;;) {
822 	char buf[BUFSIZ];
823 
824 	++curr_line;
825 	if (fgets(buf, sizeof(buf), stdin) == 0)
826 	    break;
827 	buf[strlen(buf) - 1] = '\0';
828 	_nc_set_source(buf);
829 
830 	if (tc) {
831 	    char *cp = _nc_infotocap("to termcap", buf, 1);
832 
833 	    if (cp)
834 		(void) fputs(cp, stdout);
835 	} else
836 	    (void) fputs(_nc_captoinfo("to terminfo", buf, 1), stdout);
837 	(void) putchar('\n');
838     }
839     return (0);
840 }
841 #endif /* MAIN */
842 
843 #if NO_LEAKS
844 NCURSES_EXPORT(void)
845 _nc_captoinfo_leaks(void)
846 {
847     if (my_string != 0) {
848 	FreeAndNull(my_string);
849     }
850     my_length = 0;
851 }
852 #endif
853