Commit | Line | Data |
---|---|---|
7df0b7cf MH |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | #include "ex.h" | |
3 | #include "ex_argv.h" | |
4 | #include "ex_temp.h" | |
5 | #include "ex_tty.h" | |
6 | #include "ex_vis.h" | |
7 | ||
8 | bool pflag, nflag; | |
9 | int poffset; | |
10 | ||
11 | /* | |
12 | * Subroutines for major command loop. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * Is there a single letter indicating a named buffer next? | |
17 | */ | |
18 | cmdreg() | |
19 | { | |
20 | register int c = 0; | |
21 | register int wh = skipwh(); | |
22 | ||
23 | if (wh && isalpha(peekchar())) | |
24 | c = getchar(); | |
25 | return (c); | |
26 | } | |
27 | ||
28 | /* | |
29 | * Tell whether the character ends a command | |
30 | */ | |
31 | endcmd(ch) | |
32 | int ch; | |
33 | { | |
34 | switch (ch) { | |
35 | ||
36 | case '\n': | |
37 | case EOF: | |
38 | endline = 1; | |
39 | return (1); | |
40 | ||
41 | case '|': | |
d266c416 | 42 | case '"': |
7df0b7cf MH |
43 | endline = 0; |
44 | return (1); | |
45 | } | |
46 | return (0); | |
47 | } | |
48 | ||
49 | /* | |
50 | * Insist on the end of the command. | |
51 | */ | |
52 | eol() | |
53 | { | |
54 | ||
55 | if (!skipend()) | |
56 | error("Extra chars|Extra characters at end of command"); | |
57 | ignnEOF(); | |
58 | } | |
59 | ||
60 | /* | |
61 | * Print out the message in the error message file at str, | |
62 | * with i an integer argument to printf. | |
63 | */ | |
64 | /*VARARGS2*/ | |
65 | error(str, i) | |
66 | #ifdef lint | |
67 | register char *str; | |
68 | #else | |
69 | register int str; | |
70 | #endif | |
71 | int i; | |
72 | { | |
73 | ||
74 | error0(); | |
75 | merror(str, i); | |
76 | error1(str); | |
77 | } | |
78 | ||
79 | /* | |
80 | * Rewind the argument list. | |
81 | */ | |
82 | erewind() | |
83 | { | |
84 | ||
85 | argc = argc0; | |
86 | argv = argv0; | |
87 | args = args0; | |
88 | if (argc > 1 && !hush) { | |
89 | printf(mesg("%d files@to edit"), argc); | |
90 | if (inopen) | |
91 | putchar(' '); | |
92 | else | |
93 | putNFL(); | |
94 | } | |
95 | } | |
96 | ||
97 | /* | |
98 | * Guts of the pre-printing error processing. | |
99 | * If in visual and catching errors, then we dont mung up the internals, | |
100 | * just fixing up the echo area for the print. | |
101 | * Otherwise we reset a number of externals, and discard unused input. | |
102 | */ | |
103 | error0() | |
104 | { | |
105 | ||
d266c416 MH |
106 | if (laste) { |
107 | laste = 0; | |
108 | sync(); | |
109 | } | |
7df0b7cf MH |
110 | if (vcatch) { |
111 | if (splitw == 0) | |
112 | fixech(); | |
113 | if (!SO || !SE) | |
114 | dingdong(); | |
115 | return; | |
116 | } | |
117 | if (input) { | |
118 | input = strend(input) - 1; | |
119 | if (*input == '\n') | |
120 | setlastchar('\n'); | |
121 | input = 0; | |
122 | } | |
123 | setoutt(); | |
124 | flush(); | |
125 | resetflav(); | |
7df0b7cf MH |
126 | if (!SO || !SE) |
127 | dingdong(); | |
128 | if (inopen) { | |
129 | /* | |
130 | * We are coming out of open/visual ungracefully. | |
131 | * Restore COLUMNS, undo, and fix tty mode. | |
132 | */ | |
133 | COLUMNS = OCOLUMNS; | |
134 | undvis(); | |
135 | ostop(normf); | |
d266c416 | 136 | /* ostop should be doing this |
7df0b7cf MH |
137 | putpad(VE); |
138 | putpad(KE); | |
d266c416 | 139 | */ |
7df0b7cf MH |
140 | putnl(); |
141 | } | |
142 | inopen = 0; | |
143 | holdcm = 0; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Post error printing processing. | |
148 | * Close the i/o file if left open. | |
149 | * If catching in visual then throw to the visual catch, | |
150 | * else if a child after a fork, then exit. | |
151 | * Otherwise, in the normal command mode error case, | |
152 | * finish state reset, and throw to top. | |
153 | */ | |
154 | error1(str) | |
155 | char *str; | |
156 | { | |
157 | bool die; | |
158 | ||
159 | if (io > 0) { | |
160 | close(io); | |
161 | io = -1; | |
162 | } | |
163 | die = (getpid() != ppid); /* Only children die */ | |
d266c416 | 164 | inappend = inglobal = 0; |
887e3e0d | 165 | globp = vglobp = vmacp = 0; |
7df0b7cf | 166 | if (vcatch && !die) { |
7df0b7cf MH |
167 | inopen = 1; |
168 | vcatch = 0; | |
887e3e0d MH |
169 | if (str) |
170 | noonl(); | |
7df0b7cf MH |
171 | fixol(); |
172 | longjmp(vreslab,1); | |
173 | } | |
174 | if (str && !vcatch) | |
175 | putNFL(); | |
176 | if (die) | |
177 | exit(1); | |
178 | lseek(0, 0L, 2); | |
179 | if (inglobal) | |
180 | setlastchar('\n'); | |
7df0b7cf MH |
181 | while (lastchar() != '\n' && lastchar() != EOF) |
182 | ignchar(); | |
183 | ungetchar(0); | |
184 | endline = 1; | |
185 | reset(); | |
186 | } | |
187 | ||
188 | fixol() | |
189 | { | |
190 | if (Outchar != vputchar) { | |
191 | flush(); | |
192 | if (state == ONEOPEN || state == HARDOPEN) | |
193 | outline = destline = 0; | |
194 | Outchar = vputchar; | |
195 | vcontin(1); | |
196 | } else { | |
197 | if (destcol) | |
198 | vclreol(); | |
199 | vclean(); | |
200 | } | |
201 | } | |
202 | ||
203 | /* | |
204 | * Does an ! character follow in the command stream? | |
205 | */ | |
206 | exclam() | |
207 | { | |
208 | ||
209 | if (peekchar() == '!') { | |
210 | ignchar(); | |
211 | return (1); | |
212 | } | |
213 | return (0); | |
214 | } | |
215 | ||
216 | /* | |
217 | * Make an argument list for e.g. next. | |
218 | */ | |
219 | makargs() | |
220 | { | |
221 | ||
222 | glob(&frob); | |
223 | argc0 = frob.argc0; | |
224 | argv0 = frob.argv; | |
225 | args0 = argv0[0]; | |
226 | erewind(); | |
227 | } | |
228 | ||
229 | /* | |
230 | * Advance to next file in argument list. | |
231 | */ | |
232 | next() | |
233 | { | |
d266c416 | 234 | extern short isalt; /* defined in ex_io.c */ |
7df0b7cf MH |
235 | |
236 | if (argc == 0) | |
237 | error("No more files@to edit"); | |
238 | morargc = argc; | |
d266c416 | 239 | isalt = (strcmp(altfile, args)==0) + 1; |
7df0b7cf MH |
240 | if (savedfile[0]) |
241 | CP(altfile, savedfile); | |
242 | CP(savedfile, args); | |
243 | argc--; | |
244 | args = argv ? *++argv : strend(args) + 1; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Eat trailing flags and offsets after a command, | |
249 | * saving for possible later post-command prints. | |
250 | */ | |
251 | newline() | |
252 | { | |
253 | register int c; | |
254 | ||
255 | resetflav(); | |
256 | for (;;) { | |
257 | c = getchar(); | |
258 | switch (c) { | |
259 | ||
260 | case '^': | |
261 | case '-': | |
262 | poffset--; | |
263 | break; | |
264 | ||
265 | case '+': | |
266 | poffset++; | |
267 | break; | |
268 | ||
269 | case 'l': | |
270 | listf++; | |
271 | break; | |
272 | ||
273 | case '#': | |
274 | nflag++; | |
275 | break; | |
276 | ||
277 | case 'p': | |
278 | listf = 0; | |
279 | break; | |
280 | ||
281 | case ' ': | |
282 | case '\t': | |
283 | continue; | |
284 | ||
d266c416 MH |
285 | case '"': |
286 | comment(); | |
287 | setflav(); | |
288 | return; | |
289 | ||
7df0b7cf MH |
290 | default: |
291 | if (!endcmd(c)) | |
292 | serror("Extra chars|Extra characters at end of \"%s\" command", Command); | |
293 | if (c == EOF) | |
294 | ungetchar(c); | |
295 | setflav(); | |
296 | return; | |
297 | } | |
298 | pflag++; | |
299 | } | |
300 | } | |
301 | ||
302 | /* | |
303 | * Before quit or respec of arg list, check that there are | |
304 | * no more files in the arg list. | |
305 | */ | |
306 | nomore() | |
307 | { | |
308 | ||
309 | if (argc == 0 || morargc == argc) | |
310 | return; | |
311 | morargc = argc; | |
312 | merror("%d more file", argc); | |
313 | serror("%s@to edit", plural((long) argc)); | |
314 | } | |
315 | ||
316 | /* | |
317 | * Before edit of new file check that either an ! follows | |
318 | * or the file has not been changed. | |
319 | */ | |
320 | quickly() | |
321 | { | |
322 | ||
323 | if (exclam()) | |
324 | return (1); | |
325 | if (chng && dol > zero) { | |
326 | /* | |
327 | chng = 0; | |
328 | */ | |
329 | xchng = 0; | |
330 | error("No write@since last change (:%s! overrides)", Command); | |
331 | } | |
332 | return (0); | |
333 | } | |
334 | ||
335 | /* | |
336 | * Reset the flavor of the output to print mode with no numbering. | |
337 | */ | |
338 | resetflav() | |
339 | { | |
340 | ||
341 | if (inopen) | |
342 | return; | |
343 | listf = 0; | |
344 | nflag = 0; | |
345 | pflag = 0; | |
346 | poffset = 0; | |
347 | setflav(); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Print an error message with a %s type argument to printf. | |
352 | * Message text comes from error message file. | |
353 | */ | |
354 | serror(str, cp) | |
355 | #ifdef lint | |
356 | register char *str; | |
357 | #else | |
358 | register int str; | |
359 | #endif | |
360 | char *cp; | |
361 | { | |
362 | ||
363 | error0(); | |
364 | smerror(str, cp); | |
365 | error1(str); | |
366 | } | |
367 | ||
368 | /* | |
369 | * Set the flavor of the output based on the flags given | |
370 | * and the number and list options to either number or not number lines | |
371 | * and either use normally decoded (ARPAnet standard) characters or list mode, | |
372 | * where end of lines are marked and tabs print as ^I. | |
373 | */ | |
374 | setflav() | |
375 | { | |
376 | ||
377 | if (inopen) | |
378 | return; | |
379 | setnumb(nflag || value(NUMBER)); | |
380 | setlist(listf || value(LIST)); | |
381 | setoutt(); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Skip white space and tell whether command ends then. | |
386 | */ | |
387 | skipend() | |
388 | { | |
389 | ||
390 | pastwh(); | |
d266c416 | 391 | return (endcmd(peekchar()) && peekchar() != '"'); |
7df0b7cf MH |
392 | } |
393 | ||
394 | /* | |
395 | * Set the command name for non-word commands. | |
396 | */ | |
397 | tailspec(c) | |
398 | int c; | |
399 | { | |
400 | static char foocmd[2]; | |
401 | ||
402 | foocmd[0] = c; | |
403 | Command = foocmd; | |
404 | } | |
405 | ||
406 | /* | |
407 | * Try to read off the rest of the command word. | |
408 | * If alphabetics follow, then this is not the command we seek. | |
409 | */ | |
410 | tail(comm) | |
411 | char *comm; | |
412 | { | |
413 | ||
414 | tailprim(comm, 1, 0); | |
415 | } | |
416 | ||
417 | tail2of(comm) | |
418 | char *comm; | |
419 | { | |
420 | ||
421 | tailprim(comm, 2, 0); | |
422 | } | |
423 | ||
424 | char tcommand[20]; | |
425 | ||
426 | tailprim(comm, i, notinvis) | |
427 | register char *comm; | |
428 | int i; | |
429 | bool notinvis; | |
430 | { | |
431 | register char *cp; | |
432 | register int c; | |
433 | ||
434 | Command = comm; | |
435 | for (cp = tcommand; i > 0; i--) | |
436 | *cp++ = *comm++; | |
437 | while (*comm && peekchar() == *comm) | |
438 | *cp++ = getchar(), comm++; | |
439 | c = peekchar(); | |
440 | if (notinvis || isalpha(c)) { | |
441 | /* | |
442 | * Of the trailing lp funny business, only dl and dp | |
443 | * survive the move from ed to ex. | |
444 | */ | |
445 | if (tcommand[0] == 'd' && any(c, "lp")) | |
446 | goto ret; | |
447 | if (tcommand[0] == 's' && any(c, "gcr")) | |
448 | goto ret; | |
449 | while (cp < &tcommand[19] && isalpha(peekchar())) | |
450 | *cp++ = getchar(); | |
451 | *cp = 0; | |
452 | if (notinvis) | |
453 | serror("What?|%s: No such command from open/visual", tcommand); | |
454 | else | |
455 | serror("What?|%s: Not an editor command", tcommand); | |
456 | } | |
457 | ret: | |
458 | *cp = 0; | |
459 | } | |
460 | ||
461 | /* | |
887e3e0d | 462 | * Continue after a : command from open/visual. |
7df0b7cf MH |
463 | */ |
464 | vcontin(ask) | |
465 | bool ask; | |
466 | { | |
467 | ||
468 | if (vcnt > 0) | |
469 | vcnt = -vcnt; | |
470 | if (inopen) { | |
471 | if (state != VISUAL) { | |
887e3e0d MH |
472 | /* |
473 | * We don't know what a shell command may have left on | |
474 | * the screen, so we move the cursor to the right place | |
475 | * and then put out a newline. But this makes an extra | |
476 | * blank line most of the time so we only do it for :sh | |
477 | * since the prompt gets left on the screen. | |
478 | * | |
479 | * BUG: :!echo longer than current line \\c | |
480 | * will screw it up, but be reasonable! | |
481 | */ | |
482 | if (state == CRTOPEN) { | |
483 | termreset(); | |
484 | vgoto(WECHO, 0); | |
485 | } | |
486 | if (!ask) { | |
487 | putch('\r'); | |
488 | putch('\n'); | |
489 | } | |
7df0b7cf MH |
490 | return; |
491 | } | |
492 | if (ask) { | |
493 | merror("[Hit return to continue] "); | |
494 | flush(); | |
495 | } | |
496 | #ifndef CBREAK | |
497 | vraw(); | |
498 | #endif | |
499 | if (ask) { | |
887e3e0d | 500 | #ifdef EATQS |
7df0b7cf MH |
501 | /* |
502 | * Gobble ^Q/^S since the tty driver should be eating | |
503 | * them (as far as the user can see) | |
504 | */ | |
505 | while (peekkey() == CTRL(Q) || peekkey() == CTRL(S)) | |
506 | ignore(getkey()); | |
887e3e0d MH |
507 | #endif |
508 | if(getkey() == ':') { | |
509 | /* Ugh. Extra newlines, but no other way */ | |
510 | putch('\n'); | |
511 | outline = WECHO; | |
7df0b7cf | 512 | ungetkey(':'); |
887e3e0d MH |
513 | } |
514 | } | |
515 | vclrech(1); | |
d266c416 | 516 | if (Peekkey != ':') { |
887e3e0d | 517 | putpad(TI); |
d266c416 MH |
518 | tostart(); |
519 | /* replaced by ostart. | |
887e3e0d MH |
520 | putpad(VS); |
521 | putpad(KS); | |
d266c416 | 522 | */ |
7df0b7cf | 523 | } |
7df0b7cf MH |
524 | } |
525 | } | |
526 | ||
527 | /* | |
528 | * Put out a newline (before a shell escape) | |
529 | * if in open/visual. | |
530 | */ | |
531 | vnfl() | |
532 | { | |
533 | ||
534 | if (inopen) { | |
535 | if (state != VISUAL && state != CRTOPEN && destline <= WECHO) | |
536 | vclean(); | |
537 | else | |
538 | vmoveitup(1, 0); | |
539 | vgoto(WECHO, 0); | |
540 | vclrbyte(vtube[WECHO], WCOLS); | |
d266c416 MH |
541 | tostop(); |
542 | /* replaced by the ostop above | |
7df0b7cf MH |
543 | putpad(VE); |
544 | putpad(KE); | |
d266c416 | 545 | */ |
7df0b7cf MH |
546 | } |
547 | flush(); | |
548 | } |