Commit | Line | Data |
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f02902f7 | 1 | /* Work-alike for termcap, plus extra features. |
aa42ddbe | 2 | Copyright (C) 1985, 86, 93, 94, 95 Free Software Foundation, Inc. |
f02902f7 RM |
3 | |
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 2, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; see the file COPYING. If not, write to | |
ba4a8e51 KH |
16 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
17 | Boston, MA 02111-1307, USA. */ | |
f02902f7 RM |
18 | |
19 | /* Emacs config.h may rename various library functions such as malloc. */ | |
20 | #ifdef HAVE_CONFIG_H | |
21 | #include <config.h> | |
c70c2705 DM |
22 | #endif |
23 | ||
24 | #ifdef emacs | |
8fde62c1 RS |
25 | |
26 | /* Get the O_* definitions for open et al. */ | |
27 | #include <sys/file.h> | |
28 | #ifdef USG5 | |
29 | #include <fcntl.h> | |
30 | #endif | |
31 | ||
c70c2705 | 32 | #else /* not emacs */ |
f02902f7 | 33 | |
f02902f7 RM |
34 | #ifdef STDC_HEADERS |
35 | #include <stdlib.h> | |
36 | #include <string.h> | |
37 | #else | |
38 | char *getenv (); | |
39 | char *malloc (); | |
40 | char *realloc (); | |
41 | #endif | |
42 | ||
aa42ddbe DM |
43 | /* Do this after the include, in case string.h prototypes bcopy. */ |
44 | #if (defined(HAVE_STRING_H) || defined(STDC_HEADERS)) && !defined(bcopy) | |
45 | #define bcopy(s, d, n) memcpy ((d), (s), (n)) | |
46 | #endif | |
47 | ||
f02902f7 RM |
48 | #ifdef HAVE_UNISTD_H |
49 | #include <unistd.h> | |
50 | #endif | |
51 | #ifdef _POSIX_VERSION | |
52 | #include <fcntl.h> | |
53 | #endif | |
54 | ||
c70c2705 | 55 | #endif /* not emacs */ |
f02902f7 RM |
56 | |
57 | #ifndef NULL | |
58 | #define NULL (char *) 0 | |
59 | #endif | |
60 | ||
983d99b5 RM |
61 | #ifndef O_RDONLY |
62 | #define O_RDONLY 0 | |
63 | #endif | |
64 | ||
f02902f7 RM |
65 | /* BUFSIZE is the initial size allocated for the buffer |
66 | for reading the termcap file. | |
67 | It is not a limit. | |
68 | Make it large normally for speed. | |
69 | Make it variable when debugging, so can exercise | |
70 | increasing the space dynamically. */ | |
71 | ||
72 | #ifndef BUFSIZE | |
73 | #ifdef DEBUG | |
74 | #define BUFSIZE bufsize | |
75 | ||
76 | int bufsize = 128; | |
77 | #else | |
78 | #define BUFSIZE 2048 | |
79 | #endif | |
80 | #endif | |
81 | ||
aa63d440 DM |
82 | #ifndef TERMCAP_FILE |
83 | #define TERMCAP_FILE "/etc/termcap" | |
f02902f7 RM |
84 | #endif |
85 | ||
86 | #ifndef emacs | |
87 | static void | |
88 | memory_out () | |
89 | { | |
90 | write (2, "virtual memory exhausted\n", 25); | |
91 | exit (1); | |
92 | } | |
93 | ||
94 | static char * | |
95 | xmalloc (size) | |
96 | unsigned size; | |
97 | { | |
98 | register char *tem = malloc (size); | |
99 | ||
100 | if (!tem) | |
101 | memory_out (); | |
102 | return tem; | |
103 | } | |
104 | ||
105 | static char * | |
106 | xrealloc (ptr, size) | |
107 | char *ptr; | |
108 | unsigned size; | |
109 | { | |
110 | register char *tem = realloc (ptr, size); | |
111 | ||
112 | if (!tem) | |
113 | memory_out (); | |
114 | return tem; | |
115 | } | |
116 | #endif /* not emacs */ | |
117 | \f | |
118 | /* Looking up capabilities in the entry already found. */ | |
119 | ||
120 | /* The pointer to the data made by tgetent is left here | |
121 | for tgetnum, tgetflag and tgetstr to find. */ | |
122 | static char *term_entry; | |
123 | ||
124 | static char *tgetst1 (); | |
125 | ||
126 | /* Search entry BP for capability CAP. | |
127 | Return a pointer to the capability (in BP) if found, | |
128 | 0 if not found. */ | |
129 | ||
130 | static char * | |
131 | find_capability (bp, cap) | |
132 | register char *bp, *cap; | |
133 | { | |
134 | for (; *bp; bp++) | |
135 | if (bp[0] == ':' | |
136 | && bp[1] == cap[0] | |
137 | && bp[2] == cap[1]) | |
138 | return &bp[4]; | |
139 | return NULL; | |
140 | } | |
141 | ||
142 | int | |
143 | tgetnum (cap) | |
144 | char *cap; | |
145 | { | |
146 | register char *ptr = find_capability (term_entry, cap); | |
147 | if (!ptr || ptr[-1] != '#') | |
148 | return -1; | |
149 | return atoi (ptr); | |
150 | } | |
151 | ||
152 | int | |
153 | tgetflag (cap) | |
154 | char *cap; | |
155 | { | |
156 | register char *ptr = find_capability (term_entry, cap); | |
157 | return ptr && ptr[-1] == ':'; | |
158 | } | |
159 | ||
160 | /* Look up a string-valued capability CAP. | |
161 | If AREA is non-null, it points to a pointer to a block in which | |
162 | to store the string. That pointer is advanced over the space used. | |
163 | If AREA is null, space is allocated with `malloc'. */ | |
164 | ||
165 | char * | |
166 | tgetstr (cap, area) | |
167 | char *cap; | |
168 | char **area; | |
169 | { | |
170 | register char *ptr = find_capability (term_entry, cap); | |
171 | if (!ptr || (ptr[-1] != '=' && ptr[-1] != '~')) | |
172 | return NULL; | |
173 | return tgetst1 (ptr, area); | |
174 | } | |
175 | ||
176 | /* Table, indexed by a character in range 0100 to 0140 with 0100 subtracted, | |
177 | gives meaning of character following \, or a space if no special meaning. | |
178 | Eight characters per line within the string. */ | |
179 | ||
180 | static char esctab[] | |
181 | = " \007\010 \033\014 \ | |
182 | \012 \ | |
183 | \015 \011 \013 \ | |
184 | "; | |
185 | ||
186 | /* PTR points to a string value inside a termcap entry. | |
187 | Copy that value, processing \ and ^ abbreviations, | |
188 | into the block that *AREA points to, | |
189 | or to newly allocated storage if AREA is NULL. | |
190 | Return the address to which we copied the value, | |
191 | or NULL if PTR is NULL. */ | |
192 | ||
193 | static char * | |
194 | tgetst1 (ptr, area) | |
195 | char *ptr; | |
196 | char **area; | |
197 | { | |
198 | register char *p, *r; | |
199 | register int c; | |
200 | register int size; | |
201 | char *ret; | |
202 | register int c1; | |
203 | ||
204 | if (!ptr) | |
205 | return NULL; | |
206 | ||
207 | /* `ret' gets address of where to store the string. */ | |
208 | if (!area) | |
209 | { | |
210 | /* Compute size of block needed (may overestimate). */ | |
211 | p = ptr; | |
212 | while ((c = *p++) && c != ':' && c != '\n') | |
213 | ; | |
214 | ret = (char *) xmalloc (p - ptr + 1); | |
215 | } | |
216 | else | |
217 | ret = *area; | |
218 | ||
219 | /* Copy the string value, stopping at null or colon. | |
220 | Also process ^ and \ abbreviations. */ | |
221 | p = ptr; | |
222 | r = ret; | |
223 | while ((c = *p++) && c != ':' && c != '\n') | |
224 | { | |
225 | if (c == '^') | |
d80bd4a0 RS |
226 | { |
227 | c = *p++; | |
228 | if (c == '?') | |
229 | c = 0177; | |
230 | else | |
231 | c &= 037; | |
232 | } | |
f02902f7 RM |
233 | else if (c == '\\') |
234 | { | |
235 | c = *p++; | |
236 | if (c >= '0' && c <= '7') | |
237 | { | |
238 | c -= '0'; | |
239 | size = 0; | |
240 | ||
241 | while (++size < 3 && (c1 = *p) >= '0' && c1 <= '7') | |
242 | { | |
243 | c *= 8; | |
244 | c += c1 - '0'; | |
245 | p++; | |
246 | } | |
247 | } | |
248 | else if (c >= 0100 && c < 0200) | |
249 | { | |
250 | c1 = esctab[(c & ~040) - 0100]; | |
251 | if (c1 != ' ') | |
252 | c = c1; | |
253 | } | |
254 | } | |
255 | *r++ = c; | |
256 | } | |
257 | *r = '\0'; | |
258 | /* Update *AREA. */ | |
259 | if (area) | |
260 | *area = r + 1; | |
261 | return ret; | |
262 | } | |
263 | \f | |
264 | /* Outputting a string with padding. */ | |
265 | ||
266 | short ospeed; | |
267 | /* If OSPEED is 0, we use this as the actual baud rate. */ | |
268 | int tputs_baud_rate; | |
269 | char PC; | |
270 | ||
271 | /* Actual baud rate if positive; | |
272 | - baud rate / 100 if negative. */ | |
273 | ||
0c0b6c79 | 274 | static int speeds[] = |
f02902f7 RM |
275 | { |
276 | #ifdef VMS | |
277 | 0, 50, 75, 110, 134, 150, -3, -6, -12, -18, | |
278 | -20, -24, -36, -48, -72, -96, -192 | |
279 | #else /* not VMS */ | |
280 | 0, 50, 75, 110, 135, 150, -2, -3, -6, -12, | |
0c0b6c79 | 281 | -18, -24, -48, -96, -192, -288, -384, -576, -1152 |
f02902f7 RM |
282 | #endif /* not VMS */ |
283 | }; | |
284 | ||
285 | void | |
286 | tputs (str, nlines, outfun) | |
287 | register char *str; | |
288 | int nlines; | |
289 | register int (*outfun) (); | |
290 | { | |
291 | register int padcount = 0; | |
292 | register int speed; | |
293 | ||
294 | #ifdef emacs | |
295 | extern baud_rate; | |
296 | speed = baud_rate; | |
0c0b6c79 RS |
297 | /* For quite high speeds, convert to the smaller |
298 | units to avoid overflow. */ | |
299 | if (speed > 10000) | |
300 | speed = - speed / 100; | |
f02902f7 RM |
301 | #else |
302 | if (ospeed == 0) | |
303 | speed = tputs_baud_rate; | |
c7c5360f | 304 | else if (ospeed > 0 && ospeed < (sizeof speeds / sizeof speeds[0])) |
f02902f7 | 305 | speed = speeds[ospeed]; |
c7c5360f DM |
306 | else |
307 | speed = 0; | |
f02902f7 RM |
308 | #endif |
309 | ||
310 | if (!str) | |
311 | return; | |
312 | ||
313 | while (*str >= '0' && *str <= '9') | |
314 | { | |
315 | padcount += *str++ - '0'; | |
316 | padcount *= 10; | |
317 | } | |
318 | if (*str == '.') | |
319 | { | |
320 | str++; | |
321 | padcount += *str++ - '0'; | |
322 | } | |
323 | if (*str == '*') | |
324 | { | |
325 | str++; | |
326 | padcount *= nlines; | |
327 | } | |
328 | while (*str) | |
329 | (*outfun) (*str++); | |
330 | ||
0c0b6c79 | 331 | /* PADCOUNT is now in units of tenths of msec. |
95c74a10 | 332 | SPEED is measured in characters per 10 seconds |
0c0b6c79 RS |
333 | or in characters per .1 seconds (if negative). |
334 | We use the smaller units for larger speeds to avoid overflow. */ | |
335 | padcount *= speed; | |
f02902f7 RM |
336 | padcount += 500; |
337 | padcount /= 1000; | |
0c0b6c79 | 338 | if (speed < 0) |
f02902f7 RM |
339 | padcount = -padcount; |
340 | else | |
341 | { | |
342 | padcount += 50; | |
343 | padcount /= 100; | |
344 | } | |
345 | ||
346 | while (padcount-- > 0) | |
347 | (*outfun) (PC); | |
348 | } | |
349 | \f | |
350 | /* Finding the termcap entry in the termcap data base. */ | |
351 | ||
352 | struct buffer | |
353 | { | |
354 | char *beg; | |
355 | int size; | |
356 | char *ptr; | |
357 | int ateof; | |
358 | int full; | |
359 | }; | |
360 | ||
361 | /* Forward declarations of static functions. */ | |
362 | ||
363 | static int scan_file (); | |
364 | static char *gobble_line (); | |
365 | static int compare_contin (); | |
366 | static int name_match (); | |
367 | ||
368 | #ifdef VMS | |
369 | ||
370 | #include <rmsdef.h> | |
371 | #include <fab.h> | |
372 | #include <nam.h> | |
373 | ||
374 | static int | |
375 | valid_filename_p (fn) | |
376 | char *fn; | |
377 | { | |
378 | struct FAB fab = cc$rms_fab; | |
379 | struct NAM nam = cc$rms_nam; | |
380 | char esa[NAM$C_MAXRSS]; | |
381 | ||
382 | fab.fab$l_fna = fn; | |
383 | fab.fab$b_fns = strlen(fn); | |
384 | fab.fab$l_nam = &nam; | |
385 | fab.fab$l_fop = FAB$M_NAM; | |
386 | ||
387 | nam.nam$l_esa = esa; | |
388 | nam.nam$b_ess = sizeof esa; | |
389 | ||
390 | return SYS$PARSE(&fab, 0, 0) == RMS$_NORMAL; | |
391 | } | |
392 | ||
393 | #else /* !VMS */ | |
394 | ||
395 | #ifdef MSDOS /* MW, May 1993 */ | |
396 | static int | |
397 | valid_filename_p (fn) | |
398 | char *fn; | |
399 | { | |
400 | return *fn == '/' || fn[1] == ':'; | |
401 | } | |
402 | #else | |
403 | #define valid_filename_p(fn) (*(fn) == '/') | |
404 | #endif | |
405 | ||
406 | #endif /* !VMS */ | |
407 | ||
408 | /* Find the termcap entry data for terminal type NAME | |
409 | and store it in the block that BP points to. | |
410 | Record its address for future use. | |
411 | ||
412 | If BP is null, space is dynamically allocated. | |
413 | ||
414 | Return -1 if there is some difficulty accessing the data base | |
415 | of terminal types, | |
416 | 0 if the data base is accessible but the type NAME is not defined | |
417 | in it, and some other value otherwise. */ | |
418 | ||
419 | int | |
420 | tgetent (bp, name) | |
421 | char *bp, *name; | |
422 | { | |
423 | register char *termcap_name; | |
424 | register int fd; | |
425 | struct buffer buf; | |
426 | register char *bp1; | |
f21b7e24 | 427 | char *tc_search_point; |
f02902f7 RM |
428 | char *term; |
429 | int malloc_size = 0; | |
430 | register int c; | |
431 | char *tcenv; /* TERMCAP value, if it contains :tc=. */ | |
432 | char *indirect = NULL; /* Terminal type in :tc= in TERMCAP value. */ | |
433 | int filep; | |
434 | ||
435 | #ifdef INTERNAL_TERMINAL | |
436 | /* For the internal terminal we don't want to read any termcap file, | |
437 | so fake it. */ | |
438 | if (!strcmp (name, "internal")) | |
439 | { | |
440 | term = INTERNAL_TERMINAL; | |
441 | if (!bp) | |
442 | { | |
443 | malloc_size = 1 + strlen (term); | |
444 | bp = (char *) xmalloc (malloc_size); | |
445 | } | |
446 | strcpy (bp, term); | |
447 | goto ret; | |
448 | } | |
449 | #endif /* INTERNAL_TERMINAL */ | |
450 | ||
3e19e687 DM |
451 | /* For compatibility with programs like `less' that want to |
452 | put data in the termcap buffer themselves as a fallback. */ | |
453 | if (bp) | |
454 | term_entry = bp; | |
455 | ||
f02902f7 RM |
456 | termcap_name = getenv ("TERMCAP"); |
457 | if (termcap_name && *termcap_name == '\0') | |
458 | termcap_name = NULL; | |
459 | #if defined (MSDOS) && !defined (TEST) | |
460 | if (termcap_name && (*termcap_name == '\\' | |
461 | || *termcap_name == '/' | |
462 | || termcap_name[1] == ':')) | |
463 | dostounix_filename(termcap_name); | |
464 | #endif | |
465 | ||
466 | filep = termcap_name && valid_filename_p (termcap_name); | |
467 | ||
468 | /* If termcap_name is non-null and starts with / (in the un*x case, that is), | |
469 | it is a file name to use instead of /etc/termcap. | |
470 | If it is non-null and does not start with /, | |
471 | it is the entry itself, but only if | |
472 | the name the caller requested matches the TERM variable. */ | |
473 | ||
474 | if (termcap_name && !filep && !strcmp (name, getenv ("TERM"))) | |
475 | { | |
476 | indirect = tgetst1 (find_capability (termcap_name, "tc"), (char **) 0); | |
477 | if (!indirect) | |
478 | { | |
479 | if (!bp) | |
480 | bp = termcap_name; | |
481 | else | |
482 | strcpy (bp, termcap_name); | |
483 | goto ret; | |
484 | } | |
485 | else | |
486 | { /* It has tc=. Need to read /etc/termcap. */ | |
487 | tcenv = termcap_name; | |
488 | termcap_name = NULL; | |
489 | } | |
490 | } | |
491 | ||
492 | if (!termcap_name || !filep) | |
aa63d440 | 493 | termcap_name = TERMCAP_FILE; |
f02902f7 RM |
494 | |
495 | /* Here we know we must search a file and termcap_name has its name. */ | |
496 | ||
497 | #ifdef MSDOS | |
983d99b5 | 498 | fd = open (termcap_name, O_RDONLY|O_TEXT, 0); |
f02902f7 | 499 | #else |
983d99b5 | 500 | fd = open (termcap_name, O_RDONLY, 0); |
f02902f7 RM |
501 | #endif |
502 | if (fd < 0) | |
503 | return -1; | |
504 | ||
505 | buf.size = BUFSIZE; | |
506 | /* Add 1 to size to ensure room for terminating null. */ | |
507 | buf.beg = (char *) xmalloc (buf.size + 1); | |
508 | term = indirect ? indirect : name; | |
509 | ||
510 | if (!bp) | |
511 | { | |
512 | malloc_size = indirect ? strlen (tcenv) + 1 : buf.size; | |
513 | bp = (char *) xmalloc (malloc_size); | |
514 | } | |
f21b7e24 | 515 | tc_search_point = bp1 = bp; |
f02902f7 RM |
516 | |
517 | if (indirect) | |
518 | /* Copy the data from the environment variable. */ | |
519 | { | |
520 | strcpy (bp, tcenv); | |
521 | bp1 += strlen (tcenv); | |
522 | } | |
523 | ||
524 | while (term) | |
525 | { | |
526 | /* Scan the file, reading it via buf, till find start of main entry. */ | |
527 | if (scan_file (term, fd, &buf) == 0) | |
528 | { | |
529 | close (fd); | |
530 | free (buf.beg); | |
531 | if (malloc_size) | |
532 | free (bp); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | /* Free old `term' if appropriate. */ | |
537 | if (term != name) | |
538 | free (term); | |
539 | ||
540 | /* If BP is malloc'd by us, make sure it is big enough. */ | |
541 | if (malloc_size) | |
542 | { | |
543 | malloc_size = bp1 - bp + buf.size; | |
544 | termcap_name = (char *) xrealloc (bp, malloc_size); | |
545 | bp1 += termcap_name - bp; | |
f21b7e24 | 546 | tc_search_point += termcap_name - bp; |
f02902f7 RM |
547 | bp = termcap_name; |
548 | } | |
549 | ||
f02902f7 RM |
550 | /* Copy the line of the entry from buf into bp. */ |
551 | termcap_name = buf.ptr; | |
552 | while ((*bp1++ = c = *termcap_name++) && c != '\n') | |
553 | /* Drop out any \ newline sequence. */ | |
554 | if (c == '\\' && *termcap_name == '\n') | |
555 | { | |
556 | bp1--; | |
557 | termcap_name++; | |
558 | } | |
559 | *bp1 = '\0'; | |
560 | ||
561 | /* Does this entry refer to another terminal type's entry? | |
562 | If something is found, copy it into heap and null-terminate it. */ | |
f21b7e24 KH |
563 | tc_search_point = find_capability (tc_search_point, "tc"); |
564 | term = tgetst1 (tc_search_point, (char **) 0); | |
f02902f7 RM |
565 | } |
566 | ||
567 | close (fd); | |
568 | free (buf.beg); | |
569 | ||
570 | if (malloc_size) | |
571 | bp = (char *) xrealloc (bp, bp1 - bp + 1); | |
572 | ||
573 | ret: | |
574 | term_entry = bp; | |
f02902f7 RM |
575 | return 1; |
576 | } | |
577 | ||
578 | /* Given file open on FD and buffer BUFP, | |
579 | scan the file from the beginning until a line is found | |
580 | that starts the entry for terminal type STR. | |
581 | Return 1 if successful, with that line in BUFP, | |
582 | or 0 if no entry is found in the file. */ | |
583 | ||
584 | static int | |
585 | scan_file (str, fd, bufp) | |
586 | char *str; | |
587 | int fd; | |
588 | register struct buffer *bufp; | |
589 | { | |
590 | register char *end; | |
591 | ||
592 | bufp->ptr = bufp->beg; | |
593 | bufp->full = 0; | |
594 | bufp->ateof = 0; | |
595 | *bufp->ptr = '\0'; | |
596 | ||
597 | lseek (fd, 0L, 0); | |
598 | ||
599 | while (!bufp->ateof) | |
600 | { | |
601 | /* Read a line into the buffer. */ | |
602 | end = NULL; | |
603 | do | |
604 | { | |
605 | /* if it is continued, append another line to it, | |
606 | until a non-continued line ends. */ | |
607 | end = gobble_line (fd, bufp, end); | |
608 | } | |
609 | while (!bufp->ateof && end[-2] == '\\'); | |
610 | ||
611 | if (*bufp->ptr != '#' | |
612 | && name_match (bufp->ptr, str)) | |
613 | return 1; | |
614 | ||
615 | /* Discard the line just processed. */ | |
616 | bufp->ptr = end; | |
617 | } | |
618 | return 0; | |
619 | } | |
620 | ||
621 | /* Return nonzero if NAME is one of the names specified | |
622 | by termcap entry LINE. */ | |
623 | ||
624 | static int | |
625 | name_match (line, name) | |
626 | char *line, *name; | |
627 | { | |
628 | register char *tem; | |
629 | ||
630 | if (!compare_contin (line, name)) | |
631 | return 1; | |
632 | /* This line starts an entry. Is it the right one? */ | |
633 | for (tem = line; *tem && *tem != '\n' && *tem != ':'; tem++) | |
634 | if (*tem == '|' && !compare_contin (tem + 1, name)) | |
635 | return 1; | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | static int | |
641 | compare_contin (str1, str2) | |
642 | register char *str1, *str2; | |
643 | { | |
644 | register int c1, c2; | |
645 | while (1) | |
646 | { | |
647 | c1 = *str1++; | |
648 | c2 = *str2++; | |
649 | while (c1 == '\\' && *str1 == '\n') | |
650 | { | |
651 | str1++; | |
652 | while ((c1 = *str1++) == ' ' || c1 == '\t'); | |
653 | } | |
654 | if (c2 == '\0') | |
655 | { | |
656 | /* End of type being looked up. */ | |
657 | if (c1 == '|' || c1 == ':') | |
658 | /* If end of name in data base, we win. */ | |
659 | return 0; | |
660 | else | |
661 | return 1; | |
662 | } | |
663 | else if (c1 != c2) | |
664 | return 1; | |
665 | } | |
666 | } | |
667 | ||
668 | /* Make sure that the buffer <- BUFP contains a full line | |
669 | of the file open on FD, starting at the place BUFP->ptr | |
670 | points to. Can read more of the file, discard stuff before | |
671 | BUFP->ptr, or make the buffer bigger. | |
672 | ||
673 | Return the pointer to after the newline ending the line, | |
674 | or to the end of the file, if there is no newline to end it. | |
675 | ||
676 | Can also merge on continuation lines. If APPEND_END is | |
677 | non-null, it points past the newline of a line that is | |
678 | continued; we add another line onto it and regard the whole | |
679 | thing as one line. The caller decides when a line is continued. */ | |
680 | ||
681 | static char * | |
682 | gobble_line (fd, bufp, append_end) | |
683 | int fd; | |
684 | register struct buffer *bufp; | |
685 | char *append_end; | |
686 | { | |
687 | register char *end; | |
688 | register int nread; | |
689 | register char *buf = bufp->beg; | |
690 | register char *tem; | |
691 | ||
692 | if (!append_end) | |
693 | append_end = bufp->ptr; | |
694 | ||
695 | while (1) | |
696 | { | |
697 | end = append_end; | |
698 | while (*end && *end != '\n') end++; | |
699 | if (*end) | |
700 | break; | |
701 | if (bufp->ateof) | |
702 | return buf + bufp->full; | |
703 | if (bufp->ptr == buf) | |
704 | { | |
705 | if (bufp->full == bufp->size) | |
706 | { | |
707 | bufp->size *= 2; | |
708 | /* Add 1 to size to ensure room for terminating null. */ | |
709 | tem = (char *) xrealloc (buf, bufp->size + 1); | |
710 | bufp->ptr = (bufp->ptr - buf) + tem; | |
711 | append_end = (append_end - buf) + tem; | |
712 | bufp->beg = buf = tem; | |
713 | } | |
714 | } | |
715 | else | |
716 | { | |
717 | append_end -= bufp->ptr - buf; | |
718 | bcopy (bufp->ptr, buf, bufp->full -= bufp->ptr - buf); | |
719 | bufp->ptr = buf; | |
720 | } | |
721 | if (!(nread = read (fd, buf + bufp->full, bufp->size - bufp->full))) | |
722 | bufp->ateof = 1; | |
723 | bufp->full += nread; | |
724 | buf[bufp->full] = '\0'; | |
725 | } | |
726 | return end + 1; | |
727 | } | |
728 | \f | |
729 | #ifdef TEST | |
730 | ||
731 | #ifdef NULL | |
732 | #undef NULL | |
733 | #endif | |
734 | ||
735 | #include <stdio.h> | |
736 | ||
737 | main (argc, argv) | |
738 | int argc; | |
739 | char **argv; | |
740 | { | |
741 | char *term; | |
742 | char *buf; | |
743 | ||
744 | term = argv[1]; | |
745 | printf ("TERM: %s\n", term); | |
746 | ||
747 | buf = (char *) tgetent (0, term); | |
748 | if ((int) buf <= 0) | |
749 | { | |
750 | printf ("No entry.\n"); | |
751 | return 0; | |
752 | } | |
753 | ||
754 | printf ("Entry: %s\n", buf); | |
755 | ||
756 | tprint ("cm"); | |
757 | tprint ("AL"); | |
758 | ||
759 | printf ("co: %d\n", tgetnum ("co")); | |
760 | printf ("am: %d\n", tgetflag ("am")); | |
761 | } | |
762 | ||
763 | tprint (cap) | |
764 | char *cap; | |
765 | { | |
766 | char *x = tgetstr (cap, 0); | |
767 | register char *y; | |
768 | ||
769 | printf ("%s: ", cap); | |
770 | if (x) | |
771 | { | |
772 | for (y = x; *y; y++) | |
773 | if (*y <= ' ' || *y == 0177) | |
774 | printf ("\\%0o", *y); | |
775 | else | |
776 | putchar (*y); | |
777 | free (x); | |
778 | } | |
779 | else | |
780 | printf ("none"); | |
781 | putchar ('\n'); | |
782 | } | |
783 | ||
784 | #endif /* TEST */ |