Commit | Line | Data |
---|---|---|
27704fe4 BJ |
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 '|': | |
42 | endline = 0; | |
43 | return (1); | |
44 | } | |
45 | return (0); | |
46 | } | |
47 | ||
48 | /* | |
49 | * Insist on the end of the command. | |
50 | */ | |
51 | eol() | |
52 | { | |
53 | ||
54 | if (!skipend()) | |
55 | error("Extra chars|Extra characters at end of command"); | |
56 | ignnEOF(); | |
57 | } | |
58 | ||
59 | /* | |
60 | * Print out the message in the error message file at str, | |
61 | * with i an integer argument to printf. | |
62 | */ | |
63 | /*VARARGS2*/ | |
64 | error(str, i) | |
65 | #ifdef lint | |
66 | register char *str; | |
67 | #else | |
68 | register int str; | |
69 | #endif | |
70 | int i; | |
71 | { | |
72 | ||
73 | error0(); | |
74 | merror(str, i); | |
75 | error1(str); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Rewind the argument list. | |
80 | */ | |
81 | erewind() | |
82 | { | |
83 | ||
84 | argc = argc0; | |
85 | argv = argv0; | |
86 | args = args0; | |
87 | if (argc > 1 && !hush) { | |
88 | printf(mesg("%d files@to edit"), argc); | |
89 | if (inopen) | |
90 | putchar(' '); | |
91 | else | |
92 | putNFL(); | |
93 | } | |
94 | } | |
95 | ||
96 | /* | |
97 | * Guts of the pre-printing error processing. | |
98 | * If in visual and catching errors, then we dont mung up the internals, | |
99 | * just fixing up the echo area for the print. | |
100 | * Otherwise we reset a number of externals, and discard unused input. | |
101 | */ | |
102 | error0() | |
103 | { | |
104 | ||
105 | if (vcatch) { | |
106 | if (splitw == 0) | |
107 | fixech(); | |
108 | if (!SO || !SE) | |
109 | dingdong(); | |
110 | return; | |
111 | } | |
112 | if (input) { | |
113 | input = strend(input) - 1; | |
114 | if (*input == '\n') | |
115 | setlastchar('\n'); | |
116 | input = 0; | |
117 | } | |
118 | setoutt(); | |
119 | flush(); | |
120 | resetflav(); | |
121 | if (laste) { | |
122 | laste = 0; | |
123 | sync(); | |
124 | } | |
125 | if (!SO || !SE) | |
126 | dingdong(); | |
127 | if (inopen) { | |
128 | /* | |
129 | * We are coming out of open/visual ungracefully. | |
130 | * Restore COLUMNS, undo, and fix tty mode. | |
131 | */ | |
132 | COLUMNS = OCOLUMNS; | |
133 | undvis(); | |
134 | ostop(normf); | |
135 | putpad(VE); | |
136 | putpad(KE); | |
137 | putnl(); | |
138 | } | |
139 | inopen = 0; | |
140 | holdcm = 0; | |
141 | } | |
142 | ||
143 | /* | |
144 | * Post error printing processing. | |
145 | * Close the i/o file if left open. | |
146 | * If catching in visual then throw to the visual catch, | |
147 | * else if a child after a fork, then exit. | |
148 | * Otherwise, in the normal command mode error case, | |
149 | * finish state reset, and throw to top. | |
150 | */ | |
151 | error1(str) | |
152 | char *str; | |
153 | { | |
154 | bool die; | |
155 | ||
156 | if (io > 0) { | |
157 | close(io); | |
158 | io = -1; | |
159 | } | |
160 | die = (getpid() != ppid); /* Only children die */ | |
161 | if (vcatch && !die) { | |
162 | inglobal = 0; | |
163 | vglobp = vmacp = 0; | |
164 | inopen = 1; | |
165 | vcatch = 0; | |
166 | fixol(); | |
167 | longjmp(vreslab,1); | |
168 | } | |
169 | if (str && !vcatch) | |
170 | putNFL(); | |
171 | if (die) | |
172 | exit(1); | |
173 | lseek(0, 0L, 2); | |
174 | if (inglobal) | |
175 | setlastchar('\n'); | |
176 | inglobal = 0; | |
177 | globp = 0; | |
178 | while (lastchar() != '\n' && lastchar() != EOF) | |
179 | ignchar(); | |
180 | ungetchar(0); | |
181 | endline = 1; | |
182 | reset(); | |
183 | } | |
184 | ||
185 | fixol() | |
186 | { | |
187 | if (Outchar != vputchar) { | |
188 | flush(); | |
189 | if (state == ONEOPEN || state == HARDOPEN) | |
190 | outline = destline = 0; | |
191 | Outchar = vputchar; | |
192 | vcontin(1); | |
193 | } else { | |
194 | if (destcol) | |
195 | vclreol(); | |
196 | vclean(); | |
197 | } | |
198 | } | |
199 | ||
200 | /* | |
201 | * Does an ! character follow in the command stream? | |
202 | */ | |
203 | exclam() | |
204 | { | |
205 | ||
206 | if (peekchar() == '!') { | |
207 | ignchar(); | |
208 | return (1); | |
209 | } | |
210 | return (0); | |
211 | } | |
212 | ||
213 | /* | |
214 | * Make an argument list for e.g. next. | |
215 | */ | |
216 | makargs() | |
217 | { | |
218 | ||
219 | glob(&frob); | |
220 | argc0 = frob.argc0; | |
221 | argv0 = frob.argv; | |
222 | args0 = argv0[0]; | |
223 | erewind(); | |
224 | } | |
225 | ||
226 | /* | |
227 | * Advance to next file in argument list. | |
228 | */ | |
229 | next() | |
230 | { | |
231 | ||
232 | if (argc == 0) | |
233 | error("No more files@to edit"); | |
234 | morargc = argc; | |
235 | if (savedfile[0]) | |
236 | CP(altfile, savedfile); | |
237 | CP(savedfile, args); | |
238 | argc--; | |
239 | args = argv ? *++argv : strend(args) + 1; | |
240 | } | |
241 | ||
242 | /* | |
243 | * Eat trailing flags and offsets after a command, | |
244 | * saving for possible later post-command prints. | |
245 | */ | |
246 | newline() | |
247 | { | |
248 | register int c; | |
249 | ||
250 | resetflav(); | |
251 | for (;;) { | |
252 | c = getchar(); | |
253 | switch (c) { | |
254 | ||
255 | case '^': | |
256 | case '-': | |
257 | poffset--; | |
258 | break; | |
259 | ||
260 | case '+': | |
261 | poffset++; | |
262 | break; | |
263 | ||
264 | case 'l': | |
265 | listf++; | |
266 | break; | |
267 | ||
268 | case '#': | |
269 | nflag++; | |
270 | break; | |
271 | ||
272 | case 'p': | |
273 | listf = 0; | |
274 | break; | |
275 | ||
276 | case ' ': | |
277 | case '\t': | |
278 | continue; | |
279 | ||
280 | default: | |
281 | if (!endcmd(c)) | |
282 | serror("Extra chars|Extra characters at end of \"%s\" command", Command); | |
283 | if (c == EOF) | |
284 | ungetchar(c); | |
285 | setflav(); | |
286 | return; | |
287 | } | |
288 | pflag++; | |
289 | } | |
290 | } | |
291 | ||
292 | /* | |
293 | * Before quit or respec of arg list, check that there are | |
294 | * no more files in the arg list. | |
295 | */ | |
296 | nomore() | |
297 | { | |
298 | ||
299 | if (argc == 0 || morargc == argc) | |
300 | return; | |
301 | morargc = argc; | |
302 | merror("%d more file", argc); | |
303 | serror("%s@to edit", plural((long) argc)); | |
304 | } | |
305 | ||
306 | /* | |
307 | * Before edit of new file check that either an ! follows | |
308 | * or the file has not been changed. | |
309 | */ | |
310 | quickly() | |
311 | { | |
312 | ||
313 | if (exclam()) | |
314 | return (1); | |
315 | if (chng && dol > zero) { | |
316 | /* | |
317 | chng = 0; | |
318 | */ | |
319 | xchng = 0; | |
320 | error("No write@since last change (:%s! overrides)", Command); | |
321 | } | |
322 | return (0); | |
323 | } | |
324 | ||
325 | /* | |
326 | * Reset the flavor of the output to print mode with no numbering. | |
327 | */ | |
328 | resetflav() | |
329 | { | |
330 | ||
331 | if (inopen) | |
332 | return; | |
333 | listf = 0; | |
334 | nflag = 0; | |
335 | pflag = 0; | |
336 | poffset = 0; | |
337 | setflav(); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Print an error message with a %s type argument to printf. | |
342 | * Message text comes from error message file. | |
343 | */ | |
344 | serror(str, cp) | |
345 | #ifdef lint | |
346 | register char *str; | |
347 | #else | |
348 | register int str; | |
349 | #endif | |
350 | char *cp; | |
351 | { | |
352 | ||
353 | error0(); | |
354 | smerror(str, cp); | |
355 | error1(str); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Set the flavor of the output based on the flags given | |
360 | * and the number and list options to either number or not number lines | |
361 | * and either use normally decoded (ARPAnet standard) characters or list mode, | |
362 | * where end of lines are marked and tabs print as ^I. | |
363 | */ | |
364 | setflav() | |
365 | { | |
366 | ||
367 | if (inopen) | |
368 | return; | |
369 | setnumb(nflag || value(NUMBER)); | |
370 | setlist(listf || value(LIST)); | |
371 | setoutt(); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Skip white space and tell whether command ends then. | |
376 | */ | |
377 | skipend() | |
378 | { | |
379 | ||
380 | pastwh(); | |
381 | return (endcmd(peekchar())); | |
382 | } | |
383 | ||
384 | /* | |
385 | * Set the command name for non-word commands. | |
386 | */ | |
387 | tailspec(c) | |
388 | int c; | |
389 | { | |
390 | static char foocmd[2]; | |
391 | ||
392 | foocmd[0] = c; | |
393 | Command = foocmd; | |
394 | } | |
395 | ||
396 | /* | |
397 | * Try to read off the rest of the command word. | |
398 | * If alphabetics follow, then this is not the command we seek. | |
399 | */ | |
400 | tail(comm) | |
401 | char *comm; | |
402 | { | |
403 | ||
404 | tailprim(comm, 1, 0); | |
405 | } | |
406 | ||
407 | tail2of(comm) | |
408 | char *comm; | |
409 | { | |
410 | ||
411 | tailprim(comm, 2, 0); | |
412 | } | |
413 | ||
414 | char tcommand[20]; | |
415 | ||
416 | tailprim(comm, i, notinvis) | |
417 | register char *comm; | |
418 | int i; | |
419 | bool notinvis; | |
420 | { | |
421 | register char *cp; | |
422 | register int c; | |
423 | ||
424 | Command = comm; | |
425 | for (cp = tcommand; i > 0; i--) | |
426 | *cp++ = *comm++; | |
427 | while (*comm && peekchar() == *comm) | |
428 | *cp++ = getchar(), comm++; | |
429 | c = peekchar(); | |
430 | if (notinvis || isalpha(c)) { | |
431 | /* | |
432 | * Of the trailing lp funny business, only dl and dp | |
433 | * survive the move from ed to ex. | |
434 | */ | |
435 | if (tcommand[0] == 'd' && any(c, "lp")) | |
436 | goto ret; | |
437 | if (tcommand[0] == 's' && any(c, "gcr")) | |
438 | goto ret; | |
439 | while (cp < &tcommand[19] && isalpha(peekchar())) | |
440 | *cp++ = getchar(); | |
441 | *cp = 0; | |
442 | if (notinvis) | |
443 | serror("What?|%s: No such command from open/visual", tcommand); | |
444 | else | |
445 | serror("What?|%s: Not an editor command", tcommand); | |
446 | } | |
447 | ret: | |
448 | *cp = 0; | |
449 | } | |
450 | ||
451 | /* | |
452 | * Continue after a shell escape from open/visual. | |
453 | */ | |
454 | vcontin(ask) | |
455 | bool ask; | |
456 | { | |
457 | ||
458 | if (vcnt > 0) | |
459 | vcnt = -vcnt; | |
460 | if (inopen) { | |
461 | if (state != VISUAL) { | |
462 | /* | |
463 | vtube[WECHO][0] = '*'; | |
464 | vnfl(); | |
465 | */ | |
466 | return; | |
467 | } | |
468 | if (ask) { | |
469 | merror("[Hit return to continue] "); | |
470 | flush(); | |
471 | } | |
472 | #ifndef CBREAK | |
473 | vraw(); | |
474 | #endif | |
475 | if (ask) { | |
476 | /* | |
477 | * Gobble ^Q/^S since the tty driver should be eating | |
478 | * them (as far as the user can see) | |
479 | */ | |
480 | while (peekkey() == CTRL(Q) || peekkey() == CTRL(S)) | |
481 | ignore(getkey()); | |
482 | if(getkey() == ':') | |
483 | ungetkey(':'); | |
484 | } | |
485 | putpad(VS); | |
486 | putpad(KS); | |
487 | } | |
488 | } | |
489 | ||
490 | /* | |
491 | * Put out a newline (before a shell escape) | |
492 | * if in open/visual. | |
493 | */ | |
494 | vnfl() | |
495 | { | |
496 | ||
497 | if (inopen) { | |
498 | if (state != VISUAL && state != CRTOPEN && destline <= WECHO) | |
499 | vclean(); | |
500 | else | |
501 | vmoveitup(1, 0); | |
502 | vgoto(WECHO, 0); | |
503 | vclrbyte(vtube[WECHO], WCOLS); | |
504 | putpad(VE); | |
505 | putpad(KE); | |
506 | } | |
507 | flush(); | |
508 | } |