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1 | #include <string.h> | |
2 | #include <assert.h> | |
3 | #include <stdio.h> | |
4 | #include <ctype.h> | |
5 | ||
6 | #include "../localuser/localuserchannel.h" | |
7 | ||
8 | #include "hed.h" | |
9 | #include "huser.h" | |
10 | #include "hchannel.h" | |
11 | #include "helpmod.h" | |
12 | #include "hgen.h" | |
13 | ||
14 | int hed_is_valid_filename(const char *fname) | |
15 | { | |
16 | int i; | |
17 | if (strlen(fname) < 1 || strlen(fname) > (64 - 1)) | |
18 | return 0; | |
19 | ||
20 | for (i=0;i < 64 && fname[i] != '\0';i++) | |
21 | if (!isalnum(fname[i])) | |
22 | return 0; | |
23 | ||
24 | return 1; | |
25 | } | |
26 | ||
27 | helpmod_editor *hed_open(huser *husr, const char *fname) | |
28 | { | |
29 | helpmod_editor *editor; | |
30 | hed_line *ptr; | |
31 | char fname_buffer[128]; | |
32 | FILE *file; | |
33 | int i; | |
34 | ||
35 | if (hed_get(fname) != NULL) | |
36 | return hed_get(fname); | |
37 | ||
38 | if (!hed_is_valid_filename(fname)) | |
39 | return NULL; | |
40 | ||
41 | sprintf(fname_buffer, HELPMOD_TEXT_DIR"/%s" ,fname); | |
42 | file = fopen(fname_buffer, "rwt"); | |
43 | if (file == NULL) | |
44 | return NULL; | |
45 | ||
46 | editor = (helpmod_editor*)malloc(sizeof (helpmod_editor)); | |
47 | ||
48 | editor->user = husr; | |
49 | strcpy(editor->filename, fname); | |
50 | editor->line = 0; | |
51 | editor->flags = 0; | |
52 | ||
53 | editor->state = HED_COMMAND; | |
54 | editor->last_error = HED_ERR_NO_ERROR; | |
55 | ||
56 | editor->start = NULL; | |
57 | editor->free_lines = &editor->buffers[0]; | |
58 | editor->clipboard = NULL; | |
59 | ||
60 | for (ptr = editor->free_lines,i = 1;i < HED_BUFFER_LINES;i++,ptr = ptr->next) | |
61 | { | |
62 | ptr->next = &editor->buffers[i]; | |
63 | ptr->line[0] = '\0'; | |
64 | } | |
65 | ptr->next = NULL; | |
66 | ||
67 | for(i = 0;!feof(file) && i < HED_BUFFER_LINES;i++) | |
68 | { | |
69 | char *str = hed_add_line(editor, i); | |
70 | if (!fgets(str, 384, file)) | |
71 | { /* If the input ran out, the last line added has to be removed */ | |
72 | hed_del_line(editor, i); | |
73 | hed_clear_clipboard(editor); | |
74 | break; | |
75 | } | |
76 | strchr(str, '\n')[0] = '\0'; | |
77 | } | |
78 | ||
79 | fclose(file); | |
80 | ||
81 | /* Clear flags */ | |
82 | editor->flags = HED_FLAGS_DEFAULT; | |
83 | ||
84 | editor->next = helpmod_editors; | |
85 | helpmod_editors = editor; | |
86 | ||
87 | return editor; | |
88 | } | |
89 | ||
90 | helpmod_editor *hed_write(helpmod_editor *editor) | |
91 | { | |
92 | FILE *file; | |
93 | char fname_buffer[128]; | |
94 | hed_line *ptr; | |
95 | ||
96 | sprintf(fname_buffer, HELPMOD_TEXT_DIR"/%s" ,editor->filename); | |
97 | if ((file = fopen(fname_buffer, "wt")) == NULL) | |
98 | { | |
99 | Error("helpmod", ERR_ERROR, "hed: could not open file: %s", fname_buffer); | |
100 | return editor; | |
101 | } | |
102 | ||
103 | for (ptr = editor->start;ptr != NULL;ptr = ptr->next) | |
104 | fprintf(file, "%s\n", ptr->line); | |
105 | ||
106 | fclose(file); | |
107 | return editor; | |
108 | } | |
109 | ||
110 | helpmod_editor *hed_close(helpmod_editor *editor) | |
111 | { | |
112 | helpmod_editor **ptr = &helpmod_editors; | |
113 | ||
114 | if (editor == NULL) | |
115 | return NULL; | |
116 | ||
117 | for (;*ptr;ptr = &(*ptr)->next) | |
118 | if (*ptr == editor) | |
119 | { | |
120 | helpmod_editor *tmp = editor->next; | |
121 | editor->user->editor = NULL; | |
122 | ||
123 | free (editor); | |
124 | *ptr = tmp; | |
125 | break; | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | int hed_byte_count(helpmod_editor *editor) | |
131 | { | |
132 | hed_line *ptr = editor->start; | |
133 | int count = 0; | |
134 | ||
135 | for (;ptr && ptr->line[0] != '\0';ptr = ptr->next) | |
136 | count += strlen(ptr->line); | |
137 | ||
138 | return count; | |
139 | } | |
140 | ||
141 | int hed_line_count(helpmod_editor *editor) | |
142 | { | |
143 | hed_line *ptr = editor->start; | |
144 | int count = 0; | |
145 | ||
146 | for (;ptr && ptr != NULL;ptr = ptr->next) | |
147 | count++; | |
148 | ||
149 | return count; | |
150 | } | |
151 | ||
152 | /* Get by filename */ | |
153 | helpmod_editor *hed_get(const char *fname) | |
154 | { | |
155 | helpmod_editor *tmp = helpmod_editors; | |
156 | for (;tmp != NULL;tmp = tmp->next) | |
157 | if (!strcmp(tmp->filename, fname)) | |
158 | return tmp; | |
159 | return NULL; | |
160 | } | |
161 | ||
162 | void hed_command (huser *sender, channel* returntype, char* ostr, int argc, char *argv[]) | |
163 | { | |
164 | helpmod_editor *editor = sender->editor; | |
165 | assert (editor != NULL); | |
166 | ||
167 | if (editor->state == HED_COMMAND) | |
168 | { | |
169 | int i, start = editor->line + 1, stop = editor->line + 1, target = editor->line + 1, nread; | |
170 | char command; | |
171 | char buffer[128]; | |
172 | ||
173 | if (argc == 0) | |
174 | { | |
175 | editor->last_error = HED_ERR_NO_COMMAND; | |
176 | goto ERROR; | |
177 | } | |
178 | ||
179 | if (strlen(argv[0]) > 64) | |
180 | { | |
181 | editor->last_error = HED_ERR_SYNTAX_ERROR; | |
182 | goto ERROR; | |
183 | } | |
184 | ||
185 | if (!strcmp(argv[0], "wq")) | |
186 | { | |
187 | hed_write(editor); | |
188 | helpmod_reply(sender, returntype, "Ged: %d", hed_byte_count(editor)); | |
189 | hed_close(editor); | |
190 | return; | |
191 | } | |
192 | ||
193 | { /* Handle replacements */ | |
194 | int replaces = 3, j; | |
195 | for (i=0,j=0;argv[0][i] != '\0' && replaces;i++) | |
196 | { | |
197 | replaces--; | |
198 | switch (argv[0][i]) | |
199 | { | |
200 | case '.': | |
201 | j+=sprintf(&buffer[j], "%d", editor->line + 1); | |
202 | break; | |
203 | case '$': | |
204 | j+=sprintf(&buffer[j], "%d", hed_line_count(editor) + 0); | |
205 | break; | |
206 | case '-': | |
207 | case '^': | |
208 | j+=sprintf(&buffer[j], "%d", editor->line + 0); | |
209 | break; | |
210 | case '+': | |
211 | j+=sprintf(&buffer[j], "%d", editor->line + 2); | |
212 | break; | |
213 | default: | |
214 | buffer[j++] = argv[0][i]; | |
215 | replaces++; | |
216 | } | |
217 | } | |
218 | buffer[j] = '\0'; | |
219 | } | |
220 | ||
221 | /* parse the command */ | |
222 | if (strchr(buffer, ',') != NULL) | |
223 | { | |
224 | if (sscanf(buffer, "%d,%d%c%d%n", &start, &stop, &command, &target, &nread) == 4 && (nread == strlen(argv[0]))); | |
225 | else if (sscanf(buffer, "%d,%d%c%n", &start, &stop, &command, &nread) == 3 && (nread == strlen(argv[0]))); | |
226 | else | |
227 | { | |
228 | editor->last_error = HED_ERR_SYNTAX_ERROR; | |
229 | goto ERROR; | |
230 | } | |
231 | } | |
232 | else if (strnumcount(buffer) > 0) | |
233 | { | |
234 | if (sscanf(buffer, "%d%n", &start, &nread) == 1 && nread == strlen(argv[0])) | |
235 | command = 'p'; | |
236 | else if (sscanf(buffer, "%d%c%n", &start, &command, &nread) == 2 && nread == strlen(argv[0])); | |
237 | else if (sscanf(buffer, "%d%c%d%n", &start, &command, &target, &nread) == 3 && nread == strlen(argv[0])); | |
238 | else | |
239 | { | |
240 | editor->last_error = HED_ERR_SYNTAX_ERROR; | |
241 | goto ERROR; | |
242 | } | |
243 | stop = start; | |
244 | } | |
245 | else | |
246 | { | |
247 | if (sscanf(buffer, "%c%n", &command, &nread) == 1 && nread == strlen(argv[0])); | |
248 | else | |
249 | { | |
250 | editor->last_error = HED_ERR_SYNTAX_ERROR; | |
251 | goto ERROR; | |
252 | } | |
253 | } | |
254 | ||
255 | /* Change to internal presentation */ | |
256 | start--; | |
257 | stop--; | |
258 | target--; | |
259 | ||
260 | /* Handle the command */ | |
261 | switch (command) | |
262 | { | |
263 | case 'a': /* Append */ | |
264 | if (hed_line_count(editor) == HED_BUFFER_LINES) | |
265 | { | |
266 | editor->last_error = HED_ERR_BUFFER_FULL; | |
267 | goto ERROR; | |
268 | } | |
269 | if (start < 0 || stop > hed_line_count(editor) || start > stop) | |
270 | { | |
271 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
272 | goto ERROR; | |
273 | } | |
274 | editor->state = HED_INPUT_APPEND; | |
275 | break; | |
276 | case 'i': /* Insert */ | |
277 | if (hed_line_count(editor) == HED_BUFFER_LINES) | |
278 | { | |
279 | editor->last_error = HED_ERR_BUFFER_FULL; | |
280 | goto ERROR; | |
281 | } | |
282 | if (start < 0 || stop >= hed_line_count(editor) || start > stop) | |
283 | { | |
284 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
285 | goto ERROR; | |
286 | } | |
287 | editor->state = HED_INPUT_INSERT; | |
288 | break; | |
289 | case 'c': /* Replace */ | |
290 | if (start < 0 || stop >= hed_line_count(editor) || start > stop) | |
291 | { | |
292 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
293 | goto ERROR; | |
294 | } | |
295 | ||
296 | hed_del_line(editor, start); | |
297 | editor->state = HED_INPUT_INSERT; | |
298 | ||
299 | break; | |
300 | case 'd': /* Delete */ | |
301 | if (start < 0 || stop >= hed_line_count(editor) || start > stop) | |
302 | { | |
303 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
304 | goto ERROR; | |
305 | } | |
306 | ||
307 | for (i = 0;i <= stop - start;i++) | |
308 | hed_del_line(editor, start); | |
309 | ||
310 | break; | |
311 | case 'e': /* Open file for editing */ | |
312 | case 'E': /* Uncondititional e */ | |
313 | editor->last_error = HED_ERR_COMMAND_NOT_SUPPORTED; | |
314 | goto ERROR; | |
315 | break; | |
316 | case 'f': /* View (or set) the filename */ | |
317 | helpmod_reply(sender, returntype, "Ged: %s", editor->filename); | |
318 | break; | |
319 | case 'h': /* Last error */ | |
320 | helpmod_reply(sender, returntype, "Ged: %s", hed_error_text(editor->last_error)); | |
321 | break; | |
322 | case 'H': | |
323 | editor->flags ^= HED_FLAG_VERBOSE_ERRORS; | |
324 | break; | |
325 | case 'j': /* Join lines */ | |
326 | if ((start < 0 || start >= hed_line_count(editor)) || | |
327 | (stop < 0 || stop >= hed_line_count(editor)) || | |
328 | start == stop) | |
329 | { | |
330 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
331 | goto ERROR; | |
332 | } | |
333 | ||
334 | if (strlen(hed_get_line(editor, start)) + strlen(hed_get_line(editor, stop)) > 384 - 2) | |
335 | { | |
336 | editor->last_error = HED_ERR_LINE_TOO_LONG; | |
337 | goto ERROR; | |
338 | } | |
339 | ||
340 | strcat(hed_get_line(editor, start), hed_get_line(editor, stop)); | |
341 | hed_del_line(editor, stop); | |
342 | ||
343 | break; | |
344 | case 'l': /* Print */ | |
345 | case 'p': | |
346 | case 'n': /* Print with line numbers */ | |
347 | if (start < 0 || stop >= hed_line_count(editor)) | |
348 | { | |
349 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
350 | goto ERROR; | |
351 | } | |
352 | ||
353 | for (i=start;i <= stop;i++) | |
354 | if (command == 'n') | |
355 | helpmod_reply(sender, returntype, "Ged: %-8d %s", i+1, hed_get_line(editor, i)); | |
356 | else | |
357 | helpmod_reply(sender, returntype, "Ged: %s", hed_get_line(editor, i)); | |
358 | break; | |
359 | case 'm': /* Move */ | |
360 | if (start < 0 || stop >= hed_line_count(editor) || start > stop) | |
361 | { | |
362 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
363 | goto ERROR; | |
364 | } | |
365 | if (target < 0 || target >= hed_line_count(editor) - (stop - start) || | |
366 | (target >= start && target <= stop)) | |
367 | { | |
368 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
369 | goto ERROR; | |
370 | } | |
371 | if (target > start) | |
372 | target-= (stop - start); | |
373 | ||
374 | for (i = 0;i <= stop - start;i++) | |
375 | hed_del_line(editor, start); | |
376 | ||
377 | hed_paste(editor, target); | |
378 | break; | |
379 | case 'q': /* Quit */ | |
380 | if (editor->flags & HED_FLAG_UNSAVED) | |
381 | { | |
382 | editor->flags &=~HED_FLAG_UNSAVED; | |
383 | editor->last_error = HED_ERR_UNSAVED; | |
384 | goto ERROR; | |
385 | } | |
386 | else | |
387 | { | |
388 | hed_close(editor); | |
389 | return; | |
390 | } | |
391 | return; | |
392 | case 'Q': /* Unconditional quit */ | |
393 | hed_close(editor); | |
394 | return; | |
395 | case 'r': /* Read from file */ | |
396 | editor->last_error = HED_ERR_COMMAND_NOT_SUPPORTED; | |
397 | goto ERROR; | |
398 | break; | |
399 | case 'w': /* Write file */ | |
400 | hed_write(editor); | |
401 | editor->flags &=~HED_FLAG_UNSAVED; | |
402 | helpmod_reply(sender, returntype, "Ged: %d", hed_byte_count(editor)); | |
403 | break; | |
404 | case 'x': /* Paste */ | |
405 | if (start < 0 || start >= hed_line_count(editor)) | |
406 | { | |
407 | editor->last_error = HED_ERR_INVALID_ARGUMENT; | |
408 | goto ERROR; | |
409 | } | |
410 | if (editor->clipboard == NULL) | |
411 | { | |
412 | editor->last_error = HED_ERR_CLIPBOARD_EMPTY; | |
413 | goto ERROR; | |
414 | } | |
415 | hed_paste(editor, start); | |
416 | break; | |
417 | case '=': /* Current line */ | |
418 | helpmod_reply(sender, returntype, "Ged: %d", editor->line + 1); | |
419 | break; | |
420 | default: | |
421 | editor->last_error = HED_ERR_UNKNOWN_COMMAND; | |
422 | goto ERROR; | |
423 | } | |
424 | ||
425 | editor->line = start; | |
426 | } | |
427 | else | |
428 | { /* HED_INPUT */ | |
429 | char *str; | |
430 | ||
431 | if (argc == 0) | |
432 | ostr[0] = '\0'; | |
433 | ||
434 | /* return to command mode */ | |
435 | if (!strcmp(ostr, ".")) | |
436 | { | |
437 | editor->state = HED_COMMAND; | |
438 | return; | |
439 | } | |
440 | ||
441 | if (hed_line_count(editor) >= HED_BUFFER_LINES) | |
442 | { | |
443 | editor->last_error = HED_ERR_BUFFER_FULL; | |
444 | editor->state = HED_COMMAND; | |
445 | goto ERROR; | |
446 | } | |
447 | ||
448 | if (strlen(ostr) > 384 - 2) | |
449 | { | |
450 | editor->last_error = HED_ERR_LINE_TOO_LONG; | |
451 | goto ERROR; | |
452 | } | |
453 | ||
454 | switch (editor->state) | |
455 | { | |
456 | case HED_INPUT_INSERT: | |
457 | str = hed_add_line(editor, editor->line); | |
458 | strcpy(str, ostr); | |
459 | break; | |
460 | case HED_INPUT_APPEND: | |
461 | /* the last line is handled specially */ | |
462 | if (editor->line == HED_BUFFER_LINES - 1) | |
463 | editor->line--; | |
464 | str = hed_add_line(editor, editor->line + 1); | |
465 | strcpy(str, ostr); | |
466 | break; | |
467 | case HED_COMMAND: | |
468 | default: | |
469 | break; | |
470 | } | |
471 | ||
472 | editor->line++; | |
473 | } | |
474 | editor->last_error = HED_ERR_NO_ERROR; | |
475 | return; | |
476 | ERROR: | |
477 | if (editor->flags & HED_FLAG_VERBOSE_ERRORS) | |
478 | helpmod_reply(sender, returntype, "Ged: %s", hed_error_text(editor->last_error)); | |
479 | else | |
480 | helpmod_reply(sender, returntype, "Ged: ?"); | |
481 | } | |
482 | ||
483 | const char *hed_error_text(hed_error err) | |
484 | { | |
485 | switch (err) | |
486 | { | |
487 | case HED_ERR_NO_ERROR: | |
488 | return "No error"; | |
489 | case HED_ERR_NO_COMMAND: | |
490 | return "No command given"; | |
491 | case HED_ERR_SYNTAX_ERROR: | |
492 | return "Syntax error"; | |
493 | case HED_ERR_UNKNOWN_COMMAND: | |
494 | return "Unknown command"; | |
495 | case HED_ERR_COMMAND_NOT_SUPPORTED: | |
496 | return "Unsupported command"; | |
497 | case HED_ERR_INVALID_ARGUMENT: | |
498 | return "Invalid argument"; | |
499 | case HED_ERR_LINE_TOO_LONG: | |
500 | return "Line exceeds 384 characters"; | |
501 | case HED_ERR_BUFFER_FULL: | |
502 | return "Buffer full"; | |
503 | case HED_ERR_CLIPBOARD_EMPTY: | |
504 | return "Nothing to paste"; | |
505 | case HED_ERR_UNSAVED: | |
506 | return "File unsaved, q again to quit"; | |
507 | default: | |
508 | return "Error, please contact strutsi"; | |
509 | } | |
510 | } | |
511 | ||
512 | char* hed_add_line(helpmod_editor *editor, int position) | |
513 | { | |
514 | hed_line **pos, *tmp; | |
515 | hed_clear_clipboard(editor); | |
516 | ||
517 | assert(position >= 0 && position < HED_BUFFER_LINES); | |
518 | assert(hed_line_count(editor) < HED_BUFFER_LINES); | |
519 | assert(editor->free_lines != NULL); | |
520 | ||
521 | editor->flags |= HED_FLAG_UNSAVED; | |
522 | ||
523 | for (pos = &editor->start;*pos != NULL && position;pos = &(*pos)->next, position--); | |
524 | ||
525 | tmp = editor->free_lines; | |
526 | editor->free_lines = editor->free_lines->next; | |
527 | ||
528 | tmp->next = *pos; | |
529 | tmp->line[0] = '\0'; | |
530 | ||
531 | *pos = tmp; | |
532 | ||
533 | return tmp->line; | |
534 | } | |
535 | ||
536 | void hed_del_line(helpmod_editor *editor, int position) | |
537 | { | |
538 | hed_line **ptr, **ptr_free, *tmp; | |
539 | assert(position >= 0 && position < hed_line_count(editor)); | |
540 | ||
541 | editor->flags |= HED_FLAG_UNSAVED; | |
542 | ||
543 | for (ptr = &editor->start;position;ptr = &(*ptr)->next, position--); | |
544 | ||
545 | tmp = *ptr; | |
546 | *ptr = (*ptr)->next; | |
547 | ||
548 | for (ptr_free = &editor->clipboard;*ptr_free;ptr_free = &(*ptr_free)->next); | |
549 | ||
550 | tmp->next = NULL; | |
551 | *ptr_free = tmp; | |
552 | } | |
553 | ||
554 | char* hed_get_line(helpmod_editor *editor, int position) | |
555 | { | |
556 | hed_line *ptr; | |
557 | assert(position >= 0 && position < hed_line_count(editor)); | |
558 | ||
559 | for (ptr = editor->start;position--;ptr = ptr->next); | |
560 | return ptr->line; | |
561 | } | |
562 | ||
563 | void hed_clear_clipboard(helpmod_editor *editor) | |
564 | { | |
565 | hed_line **ptr; | |
566 | for (ptr = &editor->clipboard;*ptr != NULL;ptr = &(*ptr)->next); | |
567 | (*ptr) = editor->free_lines; | |
568 | editor->free_lines = editor->clipboard; | |
569 | editor->clipboard = NULL; | |
570 | } | |
571 | ||
572 | void hed_paste(helpmod_editor *editor, int position) | |
573 | { | |
574 | hed_line **ptr, **ptr_clipboard; | |
575 | ||
576 | assert(position >= 0 && position <= hed_line_count(editor)); | |
577 | editor->flags |= HED_FLAG_UNSAVED; | |
578 | ||
579 | for (ptr = &editor->start;position;ptr = &(*ptr)->next, position--); | |
580 | for (ptr_clipboard = &editor->clipboard;*ptr_clipboard != NULL;ptr_clipboard = &(*ptr_clipboard)->next); | |
581 | ||
582 | *ptr_clipboard = *ptr; | |
583 | *ptr = editor->clipboard; | |
584 | ||
585 | editor->clipboard = NULL; | |
586 | } |