]>
Commit | Line | Data |
---|---|---|
d684c216 L |
1 | /* |
2 | * (C) Copyright 2000 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * Add to readline cmdline-editing by | |
6 | * (C) Copyright 2005 | |
7 | * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com> | |
8 | * | |
9 | * SPDX-License-Identifier: GPL-2.0+ | |
10 | */ | |
11 | ||
12 | #include "common.h" | |
13 | ||
14 | #include <avr/pgmspace.h> | |
15 | #include <string.h> | |
16 | #include <stdio.h> | |
17 | ||
18 | #include "config.h" | |
19 | #include "con-utils.h" | |
20 | #include "command.h" | |
21 | #include "cli_readline.h" | |
22 | ||
23 | char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ | |
24 | ||
25 | static const FLASH char erase_seq[] = "\b \b"; /* erase sequence */ | |
26 | static const FLASH char tab_seq[] = " "; /* used to expand TABs */ | |
27 | ||
28 | #ifndef CONFIG_CMDLINE_EDITING | |
29 | static char *delete_char (char *buffer, char *p, int *colp, int *np, int plen) | |
30 | { | |
31 | char *s; | |
32 | ||
33 | if (*np == 0) | |
34 | return p; | |
35 | ||
36 | if (*(--p) == '\t') { /* will retype the whole line */ | |
37 | while (*colp > plen) { | |
38 | my_puts_P(erase_seq); | |
39 | (*colp)--; | |
40 | } | |
41 | for (s = buffer; s < p; ++s) { | |
42 | if (*s == '\t') { | |
43 | my_puts_P(tab_seq + ((*colp) & 07)); | |
44 | *colp += 8 - ((*colp) & 07); | |
45 | } else { | |
46 | ++(*colp); | |
47 | putchar(*s); | |
48 | } | |
49 | } | |
50 | } else { | |
51 | my_puts_P(erase_seq); | |
52 | (*colp)--; | |
53 | } | |
54 | (*np)--; | |
55 | ||
56 | return p; | |
57 | } | |
58 | #endif /* CONFIG_CMDLINE_EDITING */ | |
59 | ||
60 | ||
61 | #ifdef CONFIG_CMDLINE_EDITING | |
62 | ||
63 | /* | |
64 | * cmdline-editing related codes from vivi. | |
65 | * Author: Janghoon Lyu <nandy@mizi.com> | |
66 | */ | |
67 | ||
68 | #define putnstr(str, n) printf_P(PSTR("%.*s"), (int)n, str) | |
69 | ||
70 | #define CTL_CH(c) ((c) - 'a' + 1) | |
71 | #define CTL_BACKSPACE ('\b') | |
72 | #define DEL ((char)255) | |
73 | #define DEL7 ((char)127) | |
74 | #define CREAD_HIST_CHAR ('!') | |
75 | ||
76 | #define getcmd_putch(ch) putchar(ch) | |
77 | #define getcmd_getch() my_getchar() | |
78 | #define getcmd_cbeep() getcmd_putch('\a') | |
79 | ||
80 | #define HIST_MAX 5 | |
81 | #define HIST_SIZE CONFIG_SYS_CBSIZE | |
82 | ||
83 | static int hist_max; | |
84 | static int hist_add_idx; | |
85 | static int hist_cur = -1; | |
86 | static unsigned hist_num; | |
87 | ||
88 | static char *hist_list[HIST_MAX]; | |
89 | static char hist_lines[HIST_MAX][HIST_SIZE + 1]; /* Save room for NULL */ | |
90 | ||
91 | #define add_idx_minus_one() ((hist_add_idx == 0) ? hist_max : hist_add_idx-1) | |
92 | ||
93 | static void hist_init(void) | |
94 | { | |
95 | int i; | |
96 | ||
97 | hist_max = 0; | |
98 | hist_add_idx = 0; | |
99 | hist_cur = -1; | |
100 | hist_num = 0; | |
101 | ||
102 | for (i = 0; i < HIST_MAX; i++) { | |
103 | hist_list[i] = hist_lines[i]; | |
104 | hist_list[i][0] = '\0'; | |
105 | } | |
106 | } | |
107 | ||
108 | static void cread_add_to_hist(char *line) | |
109 | { | |
110 | strcpy(hist_list[hist_add_idx], line); | |
111 | ||
112 | if (++hist_add_idx >= HIST_MAX) | |
113 | hist_add_idx = 0; | |
114 | ||
115 | if (hist_add_idx > hist_max) | |
116 | hist_max = hist_add_idx; | |
117 | ||
118 | hist_num++; | |
119 | } | |
120 | ||
121 | static char *hist_prev(void) | |
122 | { | |
123 | char *ret; | |
124 | int old_cur; | |
125 | ||
126 | if (hist_cur < 0) | |
127 | return NULL; | |
128 | ||
129 | old_cur = hist_cur; | |
130 | if (--hist_cur < 0) | |
131 | hist_cur = hist_max; | |
132 | ||
133 | if (hist_cur == hist_add_idx) { | |
134 | hist_cur = old_cur; | |
135 | ret = NULL; | |
136 | } else { | |
137 | ret = hist_list[hist_cur]; | |
138 | } | |
139 | ||
140 | return ret; | |
141 | } | |
142 | ||
143 | static char *hist_next(void) | |
144 | { | |
145 | char *ret; | |
146 | ||
147 | if (hist_cur < 0) | |
148 | return NULL; | |
149 | ||
150 | if (hist_cur == hist_add_idx) | |
151 | return NULL; | |
152 | ||
153 | if (++hist_cur > hist_max) | |
154 | hist_cur = 0; | |
155 | ||
156 | if (hist_cur == hist_add_idx) | |
157 | ret = ""; | |
158 | else | |
159 | ret = hist_list[hist_cur]; | |
160 | ||
161 | return ret; | |
162 | } | |
163 | ||
164 | #ifndef CONFIG_CMDLINE_EDITING | |
165 | static void cread_print_hist_list(void) | |
166 | { | |
167 | int i; | |
168 | unsigned n; | |
169 | ||
170 | n = hist_num - hist_max; | |
171 | ||
172 | i = hist_add_idx + 1; | |
173 | while (1) { | |
174 | if (i > hist_max) | |
175 | i = 0; | |
176 | if (i == hist_add_idx) | |
177 | break; | |
178 | printf_P(PSTR("%s\n"), hist_list[i]); | |
179 | n++; | |
180 | i++; | |
181 | } | |
182 | } | |
183 | #endif /* CONFIG_CMDLINE_EDITING */ | |
184 | ||
185 | #define BEGINNING_OF_LINE() { \ | |
186 | while (num) { \ | |
187 | getcmd_putch(CTL_BACKSPACE); \ | |
188 | num--; \ | |
189 | } \ | |
190 | } | |
191 | ||
192 | #define ERASE_TO_EOL() { \ | |
193 | if (num < eol_num) { \ | |
194 | printf_P(PSTR("%*S"), (int)(eol_num - num), PSTR("")); \ | |
195 | do { \ | |
196 | getcmd_putch(CTL_BACKSPACE); \ | |
197 | } while (--eol_num > num); \ | |
198 | } \ | |
199 | } | |
200 | ||
201 | #define REFRESH_TO_EOL() { \ | |
202 | if (num < eol_num) { \ | |
203 | wlen = eol_num - num; \ | |
204 | putnstr(buf + num, wlen); \ | |
205 | num = eol_num; \ | |
206 | } \ | |
207 | } | |
208 | ||
209 | static void cread_add_char(char ichar, int insert, unsigned long *num, | |
210 | unsigned long *eol_num, char *buf, unsigned long len) | |
211 | { | |
212 | unsigned long wlen; | |
213 | ||
214 | /* room ??? */ | |
215 | if (insert || *num == *eol_num) { | |
216 | if (*eol_num > len - 1) { | |
217 | getcmd_cbeep(); | |
218 | return; | |
219 | } | |
220 | (*eol_num)++; | |
221 | } | |
222 | ||
223 | if (insert) { | |
224 | wlen = *eol_num - *num; | |
225 | if (wlen > 1) | |
226 | memmove(&buf[*num+1], &buf[*num], wlen-1); | |
227 | ||
228 | buf[*num] = ichar; | |
229 | putnstr(buf + *num, wlen); | |
230 | (*num)++; | |
231 | while (--wlen) | |
232 | getcmd_putch(CTL_BACKSPACE); | |
233 | } else { | |
234 | /* echo the character */ | |
235 | wlen = 1; | |
236 | buf[*num] = ichar; | |
237 | putnstr(buf + *num, wlen); | |
238 | (*num)++; | |
239 | } | |
240 | } | |
241 | ||
242 | static void cread_add_str(char *str, int strsize, int insert, | |
243 | unsigned long *num, unsigned long *eol_num, | |
244 | char *buf, unsigned long len) | |
245 | { | |
246 | while (strsize--) { | |
247 | cread_add_char(*str, insert, num, eol_num, buf, len); | |
248 | str++; | |
249 | } | |
250 | } | |
251 | ||
252 | static int cread_line(const FLASH char *const prompt, char *buf, unsigned int *len) | |
253 | { | |
254 | unsigned long num = 0; | |
255 | unsigned long eol_num = 0; | |
256 | unsigned long wlen; | |
257 | char ichar; | |
258 | int insert = 1; | |
259 | int esc_len = 0; | |
260 | char esc_save[8]; | |
261 | int init_len = strlen(buf); | |
262 | ||
263 | (void) prompt; | |
264 | ||
265 | if (init_len) | |
266 | cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); | |
267 | ||
268 | while (1) { | |
269 | ichar = getcmd_getch(); | |
270 | ||
271 | if ((ichar == '\n') || (ichar == '\r')) { | |
272 | putchar('\n'); | |
273 | break; | |
274 | } | |
275 | ||
276 | /* | |
277 | * handle standard linux xterm esc sequences for arrow key, etc. | |
278 | */ | |
279 | if (esc_len != 0) { | |
280 | if (esc_len == 1) { | |
281 | if (ichar == '[') { | |
282 | esc_save[esc_len] = ichar; | |
283 | esc_len = 2; | |
284 | } else { | |
285 | cread_add_str(esc_save, esc_len, | |
286 | insert, &num, &eol_num, | |
287 | buf, *len); | |
288 | esc_len = 0; | |
289 | } | |
290 | continue; | |
291 | } | |
292 | ||
293 | switch (ichar) { | |
294 | case 'D': /* <- key */ | |
295 | ichar = CTL_CH('b'); | |
296 | esc_len = 0; | |
297 | break; | |
298 | case 'C': /* -> key */ | |
299 | ichar = CTL_CH('f'); | |
300 | esc_len = 0; | |
301 | break; /* pass off to ^F handler */ | |
302 | case 'H': /* Home key */ | |
303 | ichar = CTL_CH('a'); | |
304 | esc_len = 0; | |
305 | break; /* pass off to ^A handler */ | |
306 | case 'A': /* up arrow */ | |
307 | ichar = CTL_CH('p'); | |
308 | esc_len = 0; | |
309 | break; /* pass off to ^P handler */ | |
310 | case 'B': /* down arrow */ | |
311 | ichar = CTL_CH('n'); | |
312 | esc_len = 0; | |
313 | break; /* pass off to ^N handler */ | |
314 | default: | |
315 | esc_save[esc_len++] = ichar; | |
316 | cread_add_str(esc_save, esc_len, insert, | |
317 | &num, &eol_num, buf, *len); | |
318 | esc_len = 0; | |
319 | continue; | |
320 | } | |
321 | } | |
322 | ||
323 | switch (ichar) { | |
324 | case 0x1b: | |
325 | if (esc_len == 0) { | |
326 | esc_save[esc_len] = ichar; | |
327 | esc_len = 1; | |
328 | } else { | |
329 | my_puts_P(PSTR("impossible condition #876\n")); | |
330 | esc_len = 0; | |
331 | } | |
332 | break; | |
333 | ||
334 | case CTL_CH('a'): | |
335 | BEGINNING_OF_LINE(); | |
336 | break; | |
337 | case CTL_CH('c'): /* ^C - break */ | |
338 | *buf = '\0'; /* discard input */ | |
339 | return -1; | |
340 | case CTL_CH('f'): | |
341 | if (num < eol_num) { | |
342 | getcmd_putch(buf[num]); | |
343 | num++; | |
344 | } | |
345 | break; | |
346 | case CTL_CH('b'): | |
347 | if (num) { | |
348 | getcmd_putch(CTL_BACKSPACE); | |
349 | num--; | |
350 | } | |
351 | break; | |
352 | case CTL_CH('d'): | |
353 | if (num < eol_num) { | |
354 | wlen = eol_num - num - 1; | |
355 | if (wlen) { | |
356 | memmove(&buf[num], &buf[num+1], wlen); | |
357 | putnstr(buf + num, wlen); | |
358 | } | |
359 | ||
360 | getcmd_putch(' '); | |
361 | do { | |
362 | getcmd_putch(CTL_BACKSPACE); | |
363 | } while (wlen--); | |
364 | eol_num--; | |
365 | } | |
366 | break; | |
367 | case CTL_CH('k'): | |
368 | ERASE_TO_EOL(); | |
369 | break; | |
370 | case CTL_CH('e'): | |
371 | REFRESH_TO_EOL(); | |
372 | break; | |
373 | case CTL_CH('o'): | |
374 | insert = !insert; | |
375 | break; | |
376 | case CTL_CH('x'): | |
377 | case CTL_CH('u'): | |
378 | BEGINNING_OF_LINE(); | |
379 | ERASE_TO_EOL(); | |
380 | break; | |
381 | case DEL: | |
382 | case DEL7: | |
383 | case 8: | |
384 | if (num) { | |
385 | wlen = eol_num - num; | |
386 | num--; | |
387 | memmove(&buf[num], &buf[num+1], wlen); | |
388 | getcmd_putch(CTL_BACKSPACE); | |
389 | putnstr(buf + num, wlen); | |
390 | getcmd_putch(' '); | |
391 | do { | |
392 | getcmd_putch(CTL_BACKSPACE); | |
393 | } while (wlen--); | |
394 | eol_num--; | |
395 | } | |
396 | break; | |
397 | case CTL_CH('p'): | |
398 | case CTL_CH('n'): | |
399 | { | |
400 | char *hline; | |
401 | ||
402 | esc_len = 0; | |
403 | ||
404 | if (ichar == CTL_CH('p')) | |
405 | hline = hist_prev(); | |
406 | else | |
407 | hline = hist_next(); | |
408 | ||
409 | if (!hline) { | |
410 | getcmd_cbeep(); | |
411 | continue; | |
412 | } | |
413 | ||
414 | /* nuke the current line */ | |
415 | /* first, go home */ | |
416 | BEGINNING_OF_LINE(); | |
417 | ||
418 | /* erase to end of line */ | |
419 | ERASE_TO_EOL(); | |
420 | ||
421 | /* copy new line into place and display */ | |
422 | strcpy(buf, hline); | |
423 | eol_num = strlen(buf); | |
424 | REFRESH_TO_EOL(); | |
425 | continue; | |
426 | } | |
427 | #ifdef CONFIG_AUTO_COMPLETE | |
428 | case '\t': { | |
429 | int num2, col; | |
430 | ||
431 | /* do not autocomplete when in the middle */ | |
432 | if (num < eol_num) { | |
433 | getcmd_cbeep(); | |
434 | break; | |
435 | } | |
436 | ||
437 | buf[num] = '\0'; | |
438 | col = strlen_P(prompt) + eol_num; | |
439 | num2 = num; | |
440 | if (cmd_auto_complete(prompt, buf, &num2, &col)) { | |
441 | col = num2 - num; | |
442 | num += col; | |
443 | eol_num += col; | |
444 | } | |
445 | break; | |
446 | } | |
447 | #endif | |
448 | default: | |
449 | cread_add_char(ichar, insert, &num, &eol_num, buf, | |
450 | *len); | |
451 | break; | |
452 | } | |
453 | } | |
454 | *len = eol_num; | |
455 | buf[eol_num] = '\0'; /* lose the newline */ | |
456 | ||
457 | if (buf[0] && buf[0] != CREAD_HIST_CHAR) | |
458 | cread_add_to_hist(buf); | |
459 | hist_cur = hist_add_idx; | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
464 | #endif /* CONFIG_CMDLINE_EDITING */ | |
465 | ||
466 | /****************************************************************************/ | |
467 | ||
468 | static int cli_readline_into_buffer(const FLASH char *const prompt, char *buffer) | |
469 | { | |
470 | char *p = buffer; | |
471 | #ifdef CONFIG_CMDLINE_EDITING | |
472 | unsigned int len = CONFIG_SYS_CBSIZE; | |
473 | int rc; | |
474 | static int initted; | |
475 | ||
476 | if (!initted) { | |
477 | hist_init(); | |
478 | initted = 1; | |
479 | } | |
480 | ||
481 | if (prompt) | |
482 | my_puts_P(prompt); | |
483 | ||
484 | rc = cread_line(prompt, p, &len); | |
485 | return rc < 0 ? rc : (int) len; | |
486 | ||
487 | #else /* CONFIG_CMDLINE_EDITING */ | |
488 | char *p_buf = p; | |
489 | int n = 0; /* buffer index */ | |
490 | int plen = 0; /* prompt length */ | |
491 | int col; /* output column cnt */ | |
492 | char c; | |
493 | ||
494 | /* print prompt */ | |
495 | if (prompt) { | |
496 | plen = strlen_P(prompt); | |
497 | my_puts_P(prompt); | |
498 | } | |
499 | col = plen; | |
500 | ||
501 | for (;;) { | |
502 | ||
503 | c = my_getchar(); | |
504 | ||
505 | /* | |
506 | * Special character handling | |
507 | */ | |
508 | switch (c) { | |
509 | case '\r': /* Enter */ | |
510 | case '\n': | |
511 | *p = '\0'; | |
512 | my_puts_P(PSTR("\r\n")); | |
513 | return p - p_buf; | |
514 | ||
515 | case '\0': /* nul */ | |
516 | continue; | |
517 | ||
518 | case 0x03: /* ^C - break */ | |
519 | p_buf[0] = '\0'; /* discard input */ | |
520 | return -1; | |
521 | ||
522 | case 0x15: /* ^U - erase line */ | |
523 | while (col > plen) { | |
524 | my_puts_P(erase_seq); | |
525 | --col; | |
526 | } | |
527 | p = p_buf; | |
528 | n = 0; | |
529 | continue; | |
530 | ||
531 | case 0x17: /* ^W - erase word */ | |
532 | p = delete_char(p_buf, p, &col, &n, plen); | |
533 | while ((n > 0) && (*p != ' ')) | |
534 | p = delete_char(p_buf, p, &col, &n, plen); | |
535 | continue; | |
536 | ||
537 | case 0x08: /* ^H - backspace */ | |
538 | case 0x7F: /* DEL - backspace */ | |
539 | p = delete_char(p_buf, p, &col, &n, plen); | |
540 | continue; | |
541 | ||
542 | default: | |
543 | /* | |
544 | * Must be a normal character then | |
545 | */ | |
546 | if (n < CONFIG_SYS_CBSIZE-2) { | |
547 | if (c == '\t') { /* expand TABs */ | |
548 | #ifdef CONFIG_AUTO_COMPLETE | |
549 | /* | |
550 | * if auto completion triggered just | |
551 | * continue | |
552 | */ | |
553 | *p = '\0'; | |
554 | if (cmd_auto_complete(prompt, | |
555 | console_buffer, | |
556 | &n, &col)) { | |
557 | p = p_buf + n; /* reset */ | |
558 | continue; | |
559 | } | |
560 | #endif | |
561 | my_puts_P(tab_seq + (col & 07)); | |
562 | col += 8 - (col & 07); | |
563 | } else { | |
564 | char buf[2]; | |
565 | ||
566 | /* | |
567 | * Echo input using puts() to force an | |
568 | * LCD flush if we are using an LCD | |
569 | */ | |
570 | ++col; | |
571 | buf[0] = c; | |
572 | buf[1] = '\0'; | |
573 | my_puts(buf); | |
574 | } | |
575 | *p++ = c; | |
576 | ++n; | |
577 | } else { /* Buffer full */ | |
578 | putchar('\a'); | |
579 | } | |
580 | } | |
581 | } | |
582 | #endif /* CONFIG_CMDLINE_EDITING */ | |
583 | } | |
584 | ||
585 | int cli_readline(const FLASH char *const prompt) | |
586 | { | |
587 | /* | |
588 | * If console_buffer isn't 0-length the user will be prompted to modify | |
589 | * it instead of entering it from scratch as desired. | |
590 | */ | |
591 | console_buffer[0] = '\0'; | |
592 | ||
593 | return cli_readline_into_buffer(prompt, console_buffer); | |
594 | } | |
595 |