Commit | Line | Data |
---|---|---|
9a067bbc 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 | ||
22 | pastwh(); | |
23 | if (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 | intag = 0; | |
106 | if (vcatch) { | |
107 | if (splitw == 0) | |
108 | fixech(); | |
109 | if (!SO || !SE) | |
110 | dingdong(); | |
111 | return; | |
112 | } | |
113 | if (input) { | |
114 | input = strend(input) - 1; | |
115 | if (*input == '\n') | |
116 | setlastchar('\n'); | |
117 | input = 0; | |
118 | } | |
119 | setoutt(); | |
120 | flush(); | |
121 | resetflav(); | |
122 | if (laste) { | |
123 | laste = 0; | |
124 | sync(); | |
125 | } | |
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); | |
136 | putpad(VE); | |
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 | ||
155 | if (io > 0) { | |
156 | close(io); | |
157 | io = -1; | |
158 | } | |
159 | if (vcatch && !die) { | |
160 | inglobal = 0; | |
161 | inopen = 1; | |
162 | vcatch = 0; | |
163 | fixol(); | |
164 | longjmp(vreslab); | |
165 | } | |
166 | if (str) | |
167 | putNFL(); | |
168 | if (die) | |
169 | exit(1); | |
170 | lseek(0, 0L, 2); | |
171 | if (inglobal) | |
172 | setlastchar('\n'); | |
173 | inglobal = 0; | |
174 | globp = 0; | |
175 | while (lastchar() != '\n' && lastchar() != EOF) | |
176 | ignchar(); | |
177 | ungetchar(0); | |
178 | endline = 1; | |
179 | reset(); | |
180 | } | |
181 | ||
182 | fixol() | |
183 | { | |
184 | if (Outchar != vputchar) { | |
185 | flush(); | |
186 | if (state == ONEOPEN || state == HARDOPEN) | |
187 | outline = destline = 0; | |
188 | Outchar = vputchar; | |
189 | vcontin(1); | |
190 | } else { | |
191 | if (destcol) | |
192 | vclreol(); | |
193 | vclean(); | |
194 | } | |
195 | } | |
196 | ||
197 | /* | |
198 | * Does an ! character follow in the command stream? | |
199 | */ | |
200 | exclam() | |
201 | { | |
202 | ||
203 | if (peekchar() == '!') { | |
204 | ignchar(); | |
205 | return (1); | |
206 | } | |
207 | return (0); | |
208 | } | |
209 | ||
210 | /* | |
211 | * Make an argument list for e.g. next. | |
212 | */ | |
213 | makargs() | |
214 | { | |
215 | ||
216 | glob(&frob); | |
217 | argc0 = frob.argc0; | |
218 | argv0 = frob.argv; | |
219 | args0 = argv0[0]; | |
220 | erewind(); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Advance to next file in argument list. | |
225 | */ | |
226 | next() | |
227 | { | |
228 | ||
229 | if (argc == 0) | |
230 | error("No more files@to edit"); | |
231 | morargc = argc; | |
232 | if (savedfile[0]) | |
233 | CP(altfile, savedfile); | |
234 | CP(savedfile, args); | |
235 | argc--; | |
236 | args = argv ? *++argv : strend(args) + 1; | |
237 | } | |
238 | ||
239 | /* | |
240 | * Eat trailing flags and offsets after a command, | |
241 | * saving for possible later post-command prints. | |
242 | */ | |
243 | newline() | |
244 | { | |
245 | register int c; | |
246 | ||
247 | resetflav(); | |
248 | for (;;) { | |
249 | c = getchar(); | |
250 | switch (c) { | |
251 | ||
252 | case '^': | |
253 | case '-': | |
254 | poffset--; | |
255 | break; | |
256 | ||
257 | case '+': | |
258 | poffset++; | |
259 | break; | |
260 | ||
261 | case 'l': | |
262 | listf++; | |
263 | break; | |
264 | ||
265 | case '#': | |
266 | nflag++; | |
267 | break; | |
268 | ||
269 | case 'p': | |
270 | listf = 0; | |
271 | break; | |
272 | ||
273 | case ' ': | |
274 | case '\t': | |
275 | continue; | |
276 | ||
277 | default: | |
278 | if (!endcmd(c)) | |
279 | serror("Extra chars|Extra characters at end of \"%s\" command", Command); | |
280 | if (c == EOF) | |
281 | ungetchar(c); | |
282 | setflav(); | |
283 | return; | |
284 | } | |
285 | pflag++; | |
286 | } | |
287 | } | |
288 | ||
289 | /* | |
290 | * Before quit or respec of arg list, check that there are | |
291 | * no more files in the arg list. | |
292 | */ | |
293 | nomore() | |
294 | { | |
295 | ||
296 | if (argc == 0 || morargc == argc) | |
297 | return; | |
298 | morargc = argc; | |
299 | merror("%d more file", argc); | |
300 | serror("%s@to edit", plural((long) argc)); | |
301 | } | |
302 | ||
303 | /* | |
304 | * Before edit of new file check that either an ! follows | |
305 | * or the file has not been changed. | |
306 | */ | |
307 | quickly() | |
308 | { | |
309 | ||
310 | if (exclam()) | |
311 | return (1); | |
312 | if (chng) { | |
313 | /* | |
314 | chng = 0; | |
315 | */ | |
316 | xchng = 0; | |
317 | error("No write@since last change (%s! overrides)", Command); | |
318 | } | |
319 | return (0); | |
320 | } | |
321 | ||
322 | /* | |
323 | * Reset the flavor of the output to print mode with no numbering. | |
324 | */ | |
325 | resetflav() | |
326 | { | |
327 | ||
328 | if (inopen) | |
329 | return; | |
330 | listf = 0; | |
331 | nflag = 0; | |
332 | pflag = 0; | |
333 | poffset = 0; | |
334 | setflav(); | |
335 | } | |
336 | ||
337 | /* | |
338 | * Print an error message with a %s type argument to printf. | |
339 | * Message text comes from error message file. | |
340 | */ | |
341 | serror(str, cp) | |
342 | #ifdef lint | |
343 | register char *str; | |
344 | #else | |
345 | register int str; | |
346 | #endif | |
347 | char *cp; | |
348 | { | |
349 | ||
350 | error0(); | |
351 | smerror(str, cp); | |
352 | error1(str); | |
353 | } | |
354 | ||
355 | /* | |
356 | * Set the flavor of the output based on the flags given | |
357 | * and the number and list options to either number or not number lines | |
358 | * and either use normally decoded (ARPAnet standard) characters or list mode, | |
359 | * where end of lines are marked and tabs print as ^I. | |
360 | */ | |
361 | setflav() | |
362 | { | |
363 | ||
364 | if (inopen) | |
365 | return; | |
366 | setnumb(nflag || value(NUMBER)); | |
367 | setlist(listf || value(LIST)); | |
368 | setoutt(); | |
369 | } | |
370 | ||
371 | /* | |
372 | * Skip white space and tell whether command ends then. | |
373 | */ | |
374 | skipend() | |
375 | { | |
376 | ||
377 | pastwh(); | |
378 | return (endcmd(peekchar())); | |
379 | } | |
380 | ||
381 | /* | |
382 | * Set the command name for non-word commands. | |
383 | */ | |
384 | tailspec(c) | |
385 | int c; | |
386 | { | |
387 | static char foocmd[2]; | |
388 | ||
389 | foocmd[0] = c; | |
390 | Command = foocmd; | |
391 | } | |
392 | ||
393 | /* | |
394 | * Try to read off the rest of the command word. | |
395 | * If alphabetics follow, then this is not the command we seek. | |
396 | */ | |
397 | tail(comm) | |
398 | char *comm; | |
399 | { | |
400 | ||
401 | tailprim(comm, 1, 0); | |
402 | } | |
403 | ||
404 | tail2of(comm) | |
405 | char *comm; | |
406 | { | |
407 | ||
408 | tailprim(comm, 2, 0); | |
409 | } | |
410 | ||
411 | char tcommand[20]; | |
412 | ||
413 | tailprim(comm, i, notinvis) | |
414 | register char *comm; | |
415 | int i; | |
416 | bool notinvis; | |
417 | { | |
418 | register char *cp; | |
419 | register int c; | |
420 | ||
421 | Command = comm; | |
422 | for (cp = tcommand; i > 0; i--) | |
423 | *cp++ = *comm++; | |
424 | while (*comm && peekchar() == *comm) | |
425 | *cp++ = getchar(), comm++; | |
426 | c = peekchar(); | |
427 | if (notinvis || isalpha(c)) { | |
428 | /* | |
429 | * Of the trailing lp funny buisness, only dl and dp | |
430 | * survive the move from ed to ex. | |
431 | */ | |
432 | if (tcommand[0] == 'd' && any(c, "lp")) | |
433 | goto ret; | |
434 | while (cp < &tcommand[19] && isalpha(peekchar())) | |
435 | *cp++ = getchar(); | |
436 | *cp = 0; | |
437 | if (notinvis) | |
438 | serror("What?|%s: No such command from open/visual", tcommand); | |
439 | else | |
440 | serror("What?|%s: Not an editor command", tcommand); | |
441 | } | |
442 | ret: | |
443 | *cp = 0; | |
444 | } | |
445 | ||
446 | /* | |
447 | * Continue after a shell escape from open/visual. | |
448 | */ | |
449 | vcontin(ask) | |
450 | bool ask; | |
451 | { | |
452 | ||
453 | if (vcnt > 0) | |
454 | vcnt = -vcnt; | |
455 | if (inopen) { | |
456 | if (state != VISUAL) { | |
457 | /* | |
458 | vtube[WECHO][0] = '*'; | |
459 | vnfl(); | |
460 | */ | |
461 | return; | |
462 | } | |
463 | if (ask) { | |
464 | merror("[Hit return to continue] "); | |
465 | flush(); | |
466 | } | |
467 | #ifdef V6 | |
468 | vraw(); | |
469 | #endif | |
470 | if (ask && getkey() == ':') | |
471 | ungetkey(':'); | |
472 | } | |
473 | } | |
474 | ||
475 | /* | |
476 | * Put out a newline (before a shell escape) | |
477 | * if in open/visual. | |
478 | */ | |
479 | vnfl() | |
480 | { | |
481 | ||
482 | if (inopen) { | |
483 | if (state != VISUAL && state != CRTOPEN && destline <= WECHO) | |
484 | vclean(); | |
485 | else | |
486 | vmoveitup(1); | |
487 | vgoto(WECHO, 0); | |
488 | vclrbyte(vtube[WECHO], WCOLS); | |
489 | flush(); | |
490 | } | |
491 | } |