Commit | Line | Data |
---|---|---|
f02902f7 | 1 | /* Work-alike for termcap, plus extra features. |
d250dcfc GM |
2 | Copyright (C) 1985, 86, 93, 94, 95, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
f02902f7 RM |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2, or (at your option) | |
8 | any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; see the file COPYING. If not, write to | |
ba4a8e51 KH |
17 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
18 | Boston, MA 02111-1307, USA. */ | |
f02902f7 RM |
19 | |
20 | /* Emacs config.h may rename various library functions such as malloc. */ | |
21 | #ifdef HAVE_CONFIG_H | |
22 | #include <config.h> | |
c70c2705 DM |
23 | #endif |
24 | ||
25 | #ifdef emacs | |
8fde62c1 | 26 | |
e608805f | 27 | #include <lisp.h> /* xmalloc is here */ |
8fde62c1 RS |
28 | /* Get the O_* definitions for open et al. */ |
29 | #include <sys/file.h> | |
e608805f | 30 | #ifdef HAVE_FCNTL_H |
8fde62c1 RS |
31 | #include <fcntl.h> |
32 | #endif | |
e608805f DL |
33 | #ifdef HAVE_UNISTD_H |
34 | #include <unistd.h> | |
35 | #endif | |
8fde62c1 | 36 | |
c70c2705 | 37 | #else /* not emacs */ |
f02902f7 | 38 | |
f02902f7 RM |
39 | #ifdef STDC_HEADERS |
40 | #include <stdlib.h> | |
41 | #include <string.h> | |
42 | #else | |
43 | char *getenv (); | |
44 | char *malloc (); | |
45 | char *realloc (); | |
46 | #endif | |
47 | ||
aa42ddbe DM |
48 | /* Do this after the include, in case string.h prototypes bcopy. */ |
49 | #if (defined(HAVE_STRING_H) || defined(STDC_HEADERS)) && !defined(bcopy) | |
50 | #define bcopy(s, d, n) memcpy ((d), (s), (n)) | |
51 | #endif | |
52 | ||
f02902f7 RM |
53 | #ifdef HAVE_UNISTD_H |
54 | #include <unistd.h> | |
55 | #endif | |
56 | #ifdef _POSIX_VERSION | |
57 | #include <fcntl.h> | |
58 | #endif | |
59 | ||
c70c2705 | 60 | #endif /* not emacs */ |
f02902f7 RM |
61 | |
62 | #ifndef NULL | |
63 | #define NULL (char *) 0 | |
64 | #endif | |
65 | ||
983d99b5 RM |
66 | #ifndef O_RDONLY |
67 | #define O_RDONLY 0 | |
68 | #endif | |
69 | ||
f02902f7 RM |
70 | /* BUFSIZE is the initial size allocated for the buffer |
71 | for reading the termcap file. | |
72 | It is not a limit. | |
73 | Make it large normally for speed. | |
74 | Make it variable when debugging, so can exercise | |
75 | increasing the space dynamically. */ | |
76 | ||
77 | #ifndef BUFSIZE | |
78 | #ifdef DEBUG | |
79 | #define BUFSIZE bufsize | |
80 | ||
81 | int bufsize = 128; | |
82 | #else | |
83 | #define BUFSIZE 2048 | |
84 | #endif | |
85 | #endif | |
86 | ||
aa63d440 DM |
87 | #ifndef TERMCAP_FILE |
88 | #define TERMCAP_FILE "/etc/termcap" | |
f02902f7 RM |
89 | #endif |
90 | ||
91 | #ifndef emacs | |
92 | static void | |
93 | memory_out () | |
94 | { | |
95 | write (2, "virtual memory exhausted\n", 25); | |
96 | exit (1); | |
97 | } | |
98 | ||
99 | static char * | |
100 | xmalloc (size) | |
101 | unsigned size; | |
102 | { | |
103 | register char *tem = malloc (size); | |
104 | ||
105 | if (!tem) | |
106 | memory_out (); | |
107 | return tem; | |
108 | } | |
109 | ||
110 | static char * | |
111 | xrealloc (ptr, size) | |
112 | char *ptr; | |
113 | unsigned size; | |
114 | { | |
115 | register char *tem = realloc (ptr, size); | |
116 | ||
117 | if (!tem) | |
118 | memory_out (); | |
119 | return tem; | |
120 | } | |
121 | #endif /* not emacs */ | |
122 | \f | |
123 | /* Looking up capabilities in the entry already found. */ | |
124 | ||
125 | /* The pointer to the data made by tgetent is left here | |
126 | for tgetnum, tgetflag and tgetstr to find. */ | |
127 | static char *term_entry; | |
128 | ||
129 | static char *tgetst1 (); | |
130 | ||
131 | /* Search entry BP for capability CAP. | |
132 | Return a pointer to the capability (in BP) if found, | |
133 | 0 if not found. */ | |
134 | ||
135 | static char * | |
136 | find_capability (bp, cap) | |
137 | register char *bp, *cap; | |
138 | { | |
139 | for (; *bp; bp++) | |
140 | if (bp[0] == ':' | |
141 | && bp[1] == cap[0] | |
142 | && bp[2] == cap[1]) | |
143 | return &bp[4]; | |
144 | return NULL; | |
145 | } | |
146 | ||
e0f712ba AC |
147 | /* These are already defined in the System framework in Mac OS X and |
148 | cause prebinding to fail. */ | |
149 | #ifndef MAC_OSX | |
f02902f7 RM |
150 | int |
151 | tgetnum (cap) | |
152 | char *cap; | |
153 | { | |
154 | register char *ptr = find_capability (term_entry, cap); | |
155 | if (!ptr || ptr[-1] != '#') | |
156 | return -1; | |
157 | return atoi (ptr); | |
158 | } | |
159 | ||
160 | int | |
161 | tgetflag (cap) | |
162 | char *cap; | |
163 | { | |
164 | register char *ptr = find_capability (term_entry, cap); | |
165 | return ptr && ptr[-1] == ':'; | |
166 | } | |
167 | ||
168 | /* Look up a string-valued capability CAP. | |
169 | If AREA is non-null, it points to a pointer to a block in which | |
170 | to store the string. That pointer is advanced over the space used. | |
171 | If AREA is null, space is allocated with `malloc'. */ | |
172 | ||
173 | char * | |
174 | tgetstr (cap, area) | |
175 | char *cap; | |
176 | char **area; | |
177 | { | |
178 | register char *ptr = find_capability (term_entry, cap); | |
179 | if (!ptr || (ptr[-1] != '=' && ptr[-1] != '~')) | |
180 | return NULL; | |
181 | return tgetst1 (ptr, area); | |
182 | } | |
e0f712ba | 183 | #endif /* MAC_OSX */ |
f02902f7 | 184 | |
1ddd1e34 RS |
185 | #ifdef IS_EBCDIC_HOST |
186 | /* Table, indexed by a character in range 0200 to 0300 with 0200 subtracted, | |
187 | gives meaning of character following \, or a space if no special meaning. | |
188 | Sixteen characters per line within the string. */ | |
189 | ||
190 | static char esctab[] | |
191 | = " \057\026 \047\014 \ | |
192 | \025 \015 \ | |
193 | \005 \013 \ | |
194 | "; | |
195 | #else | |
f02902f7 RM |
196 | /* Table, indexed by a character in range 0100 to 0140 with 0100 subtracted, |
197 | gives meaning of character following \, or a space if no special meaning. | |
198 | Eight characters per line within the string. */ | |
199 | ||
200 | static char esctab[] | |
201 | = " \007\010 \033\014 \ | |
202 | \012 \ | |
203 | \015 \011 \013 \ | |
204 | "; | |
1ddd1e34 | 205 | #endif |
f02902f7 RM |
206 | |
207 | /* PTR points to a string value inside a termcap entry. | |
208 | Copy that value, processing \ and ^ abbreviations, | |
209 | into the block that *AREA points to, | |
210 | or to newly allocated storage if AREA is NULL. | |
211 | Return the address to which we copied the value, | |
212 | or NULL if PTR is NULL. */ | |
213 | ||
214 | static char * | |
215 | tgetst1 (ptr, area) | |
216 | char *ptr; | |
217 | char **area; | |
218 | { | |
219 | register char *p, *r; | |
220 | register int c; | |
221 | register int size; | |
222 | char *ret; | |
223 | register int c1; | |
224 | ||
225 | if (!ptr) | |
226 | return NULL; | |
227 | ||
228 | /* `ret' gets address of where to store the string. */ | |
229 | if (!area) | |
230 | { | |
231 | /* Compute size of block needed (may overestimate). */ | |
232 | p = ptr; | |
233 | while ((c = *p++) && c != ':' && c != '\n') | |
234 | ; | |
235 | ret = (char *) xmalloc (p - ptr + 1); | |
236 | } | |
237 | else | |
238 | ret = *area; | |
239 | ||
240 | /* Copy the string value, stopping at null or colon. | |
241 | Also process ^ and \ abbreviations. */ | |
242 | p = ptr; | |
243 | r = ret; | |
244 | while ((c = *p++) && c != ':' && c != '\n') | |
245 | { | |
246 | if (c == '^') | |
d80bd4a0 RS |
247 | { |
248 | c = *p++; | |
249 | if (c == '?') | |
250 | c = 0177; | |
251 | else | |
252 | c &= 037; | |
253 | } | |
f02902f7 RM |
254 | else if (c == '\\') |
255 | { | |
256 | c = *p++; | |
257 | if (c >= '0' && c <= '7') | |
258 | { | |
259 | c -= '0'; | |
260 | size = 0; | |
261 | ||
262 | while (++size < 3 && (c1 = *p) >= '0' && c1 <= '7') | |
263 | { | |
264 | c *= 8; | |
265 | c += c1 - '0'; | |
266 | p++; | |
267 | } | |
268 | } | |
1ddd1e34 RS |
269 | #ifdef IS_EBCDIC_HOST |
270 | else if (c >= 0200 && c < 0360) | |
271 | { | |
272 | c1 = esctab[(c & ~0100) - 0200]; | |
273 | if (c1 != ' ') | |
274 | c = c1; | |
275 | } | |
276 | #else | |
f02902f7 RM |
277 | else if (c >= 0100 && c < 0200) |
278 | { | |
279 | c1 = esctab[(c & ~040) - 0100]; | |
280 | if (c1 != ' ') | |
281 | c = c1; | |
282 | } | |
1ddd1e34 | 283 | #endif |
f02902f7 RM |
284 | } |
285 | *r++ = c; | |
286 | } | |
287 | *r = '\0'; | |
288 | /* Update *AREA. */ | |
289 | if (area) | |
290 | *area = r + 1; | |
291 | return ret; | |
292 | } | |
293 | \f | |
294 | /* Outputting a string with padding. */ | |
295 | ||
d8eb23bd RS |
296 | #ifndef emacs |
297 | short ospeed; | |
f02902f7 RM |
298 | /* If OSPEED is 0, we use this as the actual baud rate. */ |
299 | int tputs_baud_rate; | |
d8eb23bd | 300 | #endif |
e0f712ba AC |
301 | |
302 | /* Already defined in the System framework in Mac OS X and causes | |
303 | prebinding to fail. */ | |
304 | #ifndef MAC_OSX | |
f02902f7 | 305 | char PC; |
e0f712ba | 306 | #endif /* MAC_OSX */ |
f02902f7 | 307 | |
d8eb23bd | 308 | #ifndef emacs |
f02902f7 RM |
309 | /* Actual baud rate if positive; |
310 | - baud rate / 100 if negative. */ | |
311 | ||
0c0b6c79 | 312 | static int speeds[] = |
f02902f7 RM |
313 | { |
314 | #ifdef VMS | |
315 | 0, 50, 75, 110, 134, 150, -3, -6, -12, -18, | |
316 | -20, -24, -36, -48, -72, -96, -192 | |
317 | #else /* not VMS */ | |
318 | 0, 50, 75, 110, 135, 150, -2, -3, -6, -12, | |
0c0b6c79 | 319 | -18, -24, -48, -96, -192, -288, -384, -576, -1152 |
f02902f7 RM |
320 | #endif /* not VMS */ |
321 | }; | |
322 | ||
d8eb23bd | 323 | #endif /* not emacs */ |
d250dcfc | 324 | |
e0f712ba AC |
325 | /* Already defined in the System framework in Mac OS X and causes |
326 | prebinding to fail. */ | |
327 | #ifndef MAC_OSX | |
f02902f7 RM |
328 | void |
329 | tputs (str, nlines, outfun) | |
330 | register char *str; | |
331 | int nlines; | |
332 | register int (*outfun) (); | |
333 | { | |
334 | register int padcount = 0; | |
335 | register int speed; | |
336 | ||
d8eb23bd | 337 | #ifdef emacs |
31ade731 | 338 | extern EMACS_INT baud_rate; |
f02902f7 | 339 | speed = baud_rate; |
0c0b6c79 RS |
340 | /* For quite high speeds, convert to the smaller |
341 | units to avoid overflow. */ | |
342 | if (speed > 10000) | |
343 | speed = - speed / 100; | |
d8eb23bd RS |
344 | #else |
345 | if (ospeed == 0) | |
346 | speed = tputs_baud_rate; | |
347 | else | |
348 | speed = speeds[ospeed]; | |
349 | #endif | |
f02902f7 RM |
350 | |
351 | if (!str) | |
352 | return; | |
353 | ||
354 | while (*str >= '0' && *str <= '9') | |
355 | { | |
356 | padcount += *str++ - '0'; | |
357 | padcount *= 10; | |
358 | } | |
359 | if (*str == '.') | |
360 | { | |
361 | str++; | |
362 | padcount += *str++ - '0'; | |
363 | } | |
364 | if (*str == '*') | |
365 | { | |
366 | str++; | |
367 | padcount *= nlines; | |
368 | } | |
369 | while (*str) | |
370 | (*outfun) (*str++); | |
371 | ||
0c0b6c79 | 372 | /* PADCOUNT is now in units of tenths of msec. |
95c74a10 | 373 | SPEED is measured in characters per 10 seconds |
0c0b6c79 RS |
374 | or in characters per .1 seconds (if negative). |
375 | We use the smaller units for larger speeds to avoid overflow. */ | |
376 | padcount *= speed; | |
f02902f7 RM |
377 | padcount += 500; |
378 | padcount /= 1000; | |
0c0b6c79 | 379 | if (speed < 0) |
f02902f7 RM |
380 | padcount = -padcount; |
381 | else | |
382 | { | |
383 | padcount += 50; | |
384 | padcount /= 100; | |
385 | } | |
386 | ||
387 | while (padcount-- > 0) | |
388 | (*outfun) (PC); | |
389 | } | |
e0f712ba | 390 | #endif /* MAC_OSX */ |
f02902f7 RM |
391 | \f |
392 | /* Finding the termcap entry in the termcap data base. */ | |
393 | ||
df4cb2b7 | 394 | struct termcap_buffer |
f02902f7 RM |
395 | { |
396 | char *beg; | |
397 | int size; | |
398 | char *ptr; | |
399 | int ateof; | |
400 | int full; | |
401 | }; | |
402 | ||
403 | /* Forward declarations of static functions. */ | |
404 | ||
405 | static int scan_file (); | |
406 | static char *gobble_line (); | |
407 | static int compare_contin (); | |
408 | static int name_match (); | |
409 | ||
410 | #ifdef VMS | |
411 | ||
412 | #include <rmsdef.h> | |
413 | #include <fab.h> | |
414 | #include <nam.h> | |
415 | ||
416 | static int | |
417 | valid_filename_p (fn) | |
418 | char *fn; | |
419 | { | |
420 | struct FAB fab = cc$rms_fab; | |
421 | struct NAM nam = cc$rms_nam; | |
422 | char esa[NAM$C_MAXRSS]; | |
423 | ||
424 | fab.fab$l_fna = fn; | |
425 | fab.fab$b_fns = strlen(fn); | |
426 | fab.fab$l_nam = &nam; | |
427 | fab.fab$l_fop = FAB$M_NAM; | |
428 | ||
429 | nam.nam$l_esa = esa; | |
430 | nam.nam$b_ess = sizeof esa; | |
431 | ||
432 | return SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL; | |
433 | } | |
434 | ||
435 | #else /* !VMS */ | |
436 | ||
437 | #ifdef MSDOS /* MW, May 1993 */ | |
438 | static int | |
439 | valid_filename_p (fn) | |
440 | char *fn; | |
441 | { | |
442 | return *fn == '/' || fn[1] == ':'; | |
443 | } | |
444 | #else | |
445 | #define valid_filename_p(fn) (*(fn) == '/') | |
446 | #endif | |
447 | ||
448 | #endif /* !VMS */ | |
449 | ||
450 | /* Find the termcap entry data for terminal type NAME | |
451 | and store it in the block that BP points to. | |
452 | Record its address for future use. | |
453 | ||
454 | If BP is null, space is dynamically allocated. | |
455 | ||
456 | Return -1 if there is some difficulty accessing the data base | |
457 | of terminal types, | |
458 | 0 if the data base is accessible but the type NAME is not defined | |
459 | in it, and some other value otherwise. */ | |
460 | ||
e0f712ba AC |
461 | /* Already defined in the System framework in Mac OS X and causes |
462 | prebinding to fail. */ | |
463 | #ifndef MAC_OSX | |
f02902f7 RM |
464 | int |
465 | tgetent (bp, name) | |
466 | char *bp, *name; | |
467 | { | |
468 | register char *termcap_name; | |
469 | register int fd; | |
df4cb2b7 | 470 | struct termcap_buffer buf; |
f02902f7 | 471 | register char *bp1; |
f21b7e24 | 472 | char *tc_search_point; |
f02902f7 RM |
473 | char *term; |
474 | int malloc_size = 0; | |
475 | register int c; | |
20ee9f08 | 476 | char *tcenv = NULL; /* TERMCAP value, if it contains :tc=. */ |
f02902f7 RM |
477 | char *indirect = NULL; /* Terminal type in :tc= in TERMCAP value. */ |
478 | int filep; | |
479 | ||
480 | #ifdef INTERNAL_TERMINAL | |
481 | /* For the internal terminal we don't want to read any termcap file, | |
482 | so fake it. */ | |
483 | if (!strcmp (name, "internal")) | |
484 | { | |
485 | term = INTERNAL_TERMINAL; | |
486 | if (!bp) | |
487 | { | |
488 | malloc_size = 1 + strlen (term); | |
489 | bp = (char *) xmalloc (malloc_size); | |
490 | } | |
491 | strcpy (bp, term); | |
492 | goto ret; | |
493 | } | |
494 | #endif /* INTERNAL_TERMINAL */ | |
495 | ||
3e19e687 DM |
496 | /* For compatibility with programs like `less' that want to |
497 | put data in the termcap buffer themselves as a fallback. */ | |
498 | if (bp) | |
499 | term_entry = bp; | |
500 | ||
f02902f7 RM |
501 | termcap_name = getenv ("TERMCAP"); |
502 | if (termcap_name && *termcap_name == '\0') | |
503 | termcap_name = NULL; | |
504 | #if defined (MSDOS) && !defined (TEST) | |
505 | if (termcap_name && (*termcap_name == '\\' | |
506 | || *termcap_name == '/' | |
507 | || termcap_name[1] == ':')) | |
508 | dostounix_filename(termcap_name); | |
509 | #endif | |
510 | ||
511 | filep = termcap_name && valid_filename_p (termcap_name); | |
512 | ||
513 | /* If termcap_name is non-null and starts with / (in the un*x case, that is), | |
514 | it is a file name to use instead of /etc/termcap. | |
515 | If it is non-null and does not start with /, | |
516 | it is the entry itself, but only if | |
517 | the name the caller requested matches the TERM variable. */ | |
518 | ||
519 | if (termcap_name && !filep && !strcmp (name, getenv ("TERM"))) | |
520 | { | |
521 | indirect = tgetst1 (find_capability (termcap_name, "tc"), (char **) 0); | |
522 | if (!indirect) | |
523 | { | |
524 | if (!bp) | |
525 | bp = termcap_name; | |
526 | else | |
527 | strcpy (bp, termcap_name); | |
528 | goto ret; | |
529 | } | |
530 | else | |
531 | { /* It has tc=. Need to read /etc/termcap. */ | |
532 | tcenv = termcap_name; | |
533 | termcap_name = NULL; | |
534 | } | |
535 | } | |
536 | ||
537 | if (!termcap_name || !filep) | |
aa63d440 | 538 | termcap_name = TERMCAP_FILE; |
f02902f7 RM |
539 | |
540 | /* Here we know we must search a file and termcap_name has its name. */ | |
541 | ||
542 | #ifdef MSDOS | |
983d99b5 | 543 | fd = open (termcap_name, O_RDONLY|O_TEXT, 0); |
f02902f7 | 544 | #else |
983d99b5 | 545 | fd = open (termcap_name, O_RDONLY, 0); |
f02902f7 RM |
546 | #endif |
547 | if (fd < 0) | |
548 | return -1; | |
549 | ||
550 | buf.size = BUFSIZE; | |
551 | /* Add 1 to size to ensure room for terminating null. */ | |
552 | buf.beg = (char *) xmalloc (buf.size + 1); | |
553 | term = indirect ? indirect : name; | |
554 | ||
555 | if (!bp) | |
556 | { | |
557 | malloc_size = indirect ? strlen (tcenv) + 1 : buf.size; | |
558 | bp = (char *) xmalloc (malloc_size); | |
559 | } | |
f21b7e24 | 560 | tc_search_point = bp1 = bp; |
f02902f7 RM |
561 | |
562 | if (indirect) | |
563 | /* Copy the data from the environment variable. */ | |
564 | { | |
565 | strcpy (bp, tcenv); | |
566 | bp1 += strlen (tcenv); | |
567 | } | |
568 | ||
569 | while (term) | |
570 | { | |
571 | /* Scan the file, reading it via buf, till find start of main entry. */ | |
572 | if (scan_file (term, fd, &buf) == 0) | |
573 | { | |
574 | close (fd); | |
575 | free (buf.beg); | |
576 | if (malloc_size) | |
577 | free (bp); | |
578 | return 0; | |
579 | } | |
580 | ||
581 | /* Free old `term' if appropriate. */ | |
582 | if (term != name) | |
583 | free (term); | |
584 | ||
585 | /* If BP is malloc'd by us, make sure it is big enough. */ | |
586 | if (malloc_size) | |
587 | { | |
49484b28 GM |
588 | int offset1 = bp1 - bp, offset2 = tc_search_point - bp; |
589 | malloc_size = offset1 + buf.size; | |
590 | bp = termcap_name = (char *) xrealloc (bp, malloc_size); | |
591 | bp1 = termcap_name + offset1; | |
592 | tc_search_point = termcap_name + offset2; | |
f02902f7 RM |
593 | } |
594 | ||
f02902f7 RM |
595 | /* Copy the line of the entry from buf into bp. */ |
596 | termcap_name = buf.ptr; | |
597 | while ((*bp1++ = c = *termcap_name++) && c != '\n') | |
598 | /* Drop out any \ newline sequence. */ | |
599 | if (c == '\\' && *termcap_name == '\n') | |
600 | { | |
601 | bp1--; | |
602 | termcap_name++; | |
603 | } | |
604 | *bp1 = '\0'; | |
605 | ||
606 | /* Does this entry refer to another terminal type's entry? | |
607 | If something is found, copy it into heap and null-terminate it. */ | |
f21b7e24 KH |
608 | tc_search_point = find_capability (tc_search_point, "tc"); |
609 | term = tgetst1 (tc_search_point, (char **) 0); | |
f02902f7 RM |
610 | } |
611 | ||
612 | close (fd); | |
613 | free (buf.beg); | |
614 | ||
615 | if (malloc_size) | |
616 | bp = (char *) xrealloc (bp, bp1 - bp + 1); | |
617 | ||
618 | ret: | |
619 | term_entry = bp; | |
f02902f7 RM |
620 | return 1; |
621 | } | |
e0f712ba | 622 | #endif /* MAC_OSX */ |
f02902f7 RM |
623 | |
624 | /* Given file open on FD and buffer BUFP, | |
625 | scan the file from the beginning until a line is found | |
626 | that starts the entry for terminal type STR. | |
627 | Return 1 if successful, with that line in BUFP, | |
628 | or 0 if no entry is found in the file. */ | |
629 | ||
630 | static int | |
631 | scan_file (str, fd, bufp) | |
632 | char *str; | |
633 | int fd; | |
df4cb2b7 | 634 | register struct termcap_buffer *bufp; |
f02902f7 RM |
635 | { |
636 | register char *end; | |
637 | ||
638 | bufp->ptr = bufp->beg; | |
639 | bufp->full = 0; | |
640 | bufp->ateof = 0; | |
641 | *bufp->ptr = '\0'; | |
642 | ||
643 | lseek (fd, 0L, 0); | |
644 | ||
645 | while (!bufp->ateof) | |
646 | { | |
647 | /* Read a line into the buffer. */ | |
648 | end = NULL; | |
649 | do | |
650 | { | |
651 | /* if it is continued, append another line to it, | |
652 | until a non-continued line ends. */ | |
653 | end = gobble_line (fd, bufp, end); | |
654 | } | |
655 | while (!bufp->ateof && end[-2] == '\\'); | |
656 | ||
657 | if (*bufp->ptr != '#' | |
658 | && name_match (bufp->ptr, str)) | |
659 | return 1; | |
660 | ||
661 | /* Discard the line just processed. */ | |
662 | bufp->ptr = end; | |
663 | } | |
664 | return 0; | |
665 | } | |
666 | ||
667 | /* Return nonzero if NAME is one of the names specified | |
668 | by termcap entry LINE. */ | |
669 | ||
670 | static int | |
671 | name_match (line, name) | |
672 | char *line, *name; | |
673 | { | |
674 | register char *tem; | |
675 | ||
676 | if (!compare_contin (line, name)) | |
677 | return 1; | |
678 | /* This line starts an entry. Is it the right one? */ | |
679 | for (tem = line; *tem && *tem != '\n' && *tem != ':'; tem++) | |
680 | if (*tem == '|' && !compare_contin (tem + 1, name)) | |
681 | return 1; | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | static int | |
687 | compare_contin (str1, str2) | |
688 | register char *str1, *str2; | |
689 | { | |
690 | register int c1, c2; | |
691 | while (1) | |
692 | { | |
693 | c1 = *str1++; | |
694 | c2 = *str2++; | |
695 | while (c1 == '\\' && *str1 == '\n') | |
696 | { | |
697 | str1++; | |
698 | while ((c1 = *str1++) == ' ' || c1 == '\t'); | |
699 | } | |
700 | if (c2 == '\0') | |
701 | { | |
702 | /* End of type being looked up. */ | |
703 | if (c1 == '|' || c1 == ':') | |
704 | /* If end of name in data base, we win. */ | |
705 | return 0; | |
706 | else | |
707 | return 1; | |
708 | } | |
709 | else if (c1 != c2) | |
710 | return 1; | |
711 | } | |
712 | } | |
713 | ||
714 | /* Make sure that the buffer <- BUFP contains a full line | |
715 | of the file open on FD, starting at the place BUFP->ptr | |
716 | points to. Can read more of the file, discard stuff before | |
717 | BUFP->ptr, or make the buffer bigger. | |
718 | ||
719 | Return the pointer to after the newline ending the line, | |
720 | or to the end of the file, if there is no newline to end it. | |
721 | ||
722 | Can also merge on continuation lines. If APPEND_END is | |
723 | non-null, it points past the newline of a line that is | |
724 | continued; we add another line onto it and regard the whole | |
725 | thing as one line. The caller decides when a line is continued. */ | |
726 | ||
727 | static char * | |
728 | gobble_line (fd, bufp, append_end) | |
729 | int fd; | |
df4cb2b7 | 730 | register struct termcap_buffer *bufp; |
f02902f7 RM |
731 | char *append_end; |
732 | { | |
733 | register char *end; | |
734 | register int nread; | |
735 | register char *buf = bufp->beg; | |
736 | register char *tem; | |
737 | ||
738 | if (!append_end) | |
739 | append_end = bufp->ptr; | |
740 | ||
741 | while (1) | |
742 | { | |
743 | end = append_end; | |
744 | while (*end && *end != '\n') end++; | |
745 | if (*end) | |
746 | break; | |
747 | if (bufp->ateof) | |
748 | return buf + bufp->full; | |
749 | if (bufp->ptr == buf) | |
750 | { | |
751 | if (bufp->full == bufp->size) | |
752 | { | |
753 | bufp->size *= 2; | |
754 | /* Add 1 to size to ensure room for terminating null. */ | |
755 | tem = (char *) xrealloc (buf, bufp->size + 1); | |
756 | bufp->ptr = (bufp->ptr - buf) + tem; | |
757 | append_end = (append_end - buf) + tem; | |
758 | bufp->beg = buf = tem; | |
759 | } | |
760 | } | |
761 | else | |
762 | { | |
763 | append_end -= bufp->ptr - buf; | |
764 | bcopy (bufp->ptr, buf, bufp->full -= bufp->ptr - buf); | |
765 | bufp->ptr = buf; | |
766 | } | |
767 | if (!(nread = read (fd, buf + bufp->full, bufp->size - bufp->full))) | |
768 | bufp->ateof = 1; | |
769 | bufp->full += nread; | |
770 | buf[bufp->full] = '\0'; | |
771 | } | |
772 | return end + 1; | |
773 | } | |
774 | \f | |
775 | #ifdef TEST | |
776 | ||
777 | #ifdef NULL | |
778 | #undef NULL | |
779 | #endif | |
780 | ||
781 | #include <stdio.h> | |
782 | ||
783 | main (argc, argv) | |
784 | int argc; | |
785 | char **argv; | |
786 | { | |
787 | char *term; | |
788 | char *buf; | |
789 | ||
790 | term = argv[1]; | |
791 | printf ("TERM: %s\n", term); | |
792 | ||
793 | buf = (char *) tgetent (0, term); | |
794 | if ((int) buf <= 0) | |
795 | { | |
796 | printf ("No entry.\n"); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | printf ("Entry: %s\n", buf); | |
801 | ||
802 | tprint ("cm"); | |
803 | tprint ("AL"); | |
804 | ||
805 | printf ("co: %d\n", tgetnum ("co")); | |
806 | printf ("am: %d\n", tgetflag ("am")); | |
807 | } | |
808 | ||
809 | tprint (cap) | |
810 | char *cap; | |
811 | { | |
812 | char *x = tgetstr (cap, 0); | |
813 | register char *y; | |
814 | ||
815 | printf ("%s: ", cap); | |
816 | if (x) | |
817 | { | |
818 | for (y = x; *y; y++) | |
819 | if (*y <= ' ' || *y == 0177) | |
820 | printf ("\\%0o", *y); | |
821 | else | |
822 | putchar (*y); | |
823 | free (x); | |
824 | } | |
825 | else | |
826 | printf ("none"); | |
827 | putchar ('\n'); | |
828 | } | |
829 | ||
830 | #endif /* TEST */ |