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d684c216 | 1 | /* |
35edb766 L |
2 | * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de> |
3 | * | |
d684c216 L |
4 | * (C) Copyright 2000 |
5 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
6 | * | |
7 | * Add to readline cmdline-editing by | |
8 | * (C) Copyright 2005 | |
9 | * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com> | |
10 | * | |
f32690e8 | 11 | * SPDX-License-Identifier: GPL-2.0 |
d684c216 L |
12 | */ |
13 | ||
14 | #include "common.h" | |
d684c216 L |
15 | #include <string.h> |
16 | #include <stdio.h> | |
a8b4c964 L |
17 | #include <stdlib.h> |
18 | #include <stdbool.h> | |
8506d791 | 19 | #include <ctype.h> |
d684c216 L |
20 | |
21 | #include "config.h" | |
22 | #include "con-utils.h" | |
8591c65b | 23 | #include "print-utils.h" |
d684c216 L |
24 | #include "command.h" |
25 | #include "cli_readline.h" | |
26 | ||
8506d791 L |
27 | |
28 | ||
29 | /************************************************************************************************/ | |
30 | /* TODO: | |
31 | * | |
32 | */ | |
33 | ||
34 | #define ESC 0x1b | |
35 | ||
36 | #define KEY_TAB '\t' // TAB key | |
37 | #define KEY_CR '\r' // RETURN key | |
38 | #define KEY_BACKSPACE '\b' // Backspace key | |
39 | #define KEY_ESCAPE 0x1B // ESCAPE (pressed twice) | |
40 | ||
41 | #define KEY_DOWN 0x80 // Down arrow key | |
42 | #define KEY_UP 0x81 // Up arrow key | |
43 | #define KEY_LEFT 0x82 // Left arrow key | |
44 | #define KEY_RIGHT 0x83 // Right arrow key | |
45 | #define KEY_HOME 0x84 // Home key | |
46 | #define KEY_DC 0x85 // Delete character key | |
47 | #define KEY_IC 0x86 // Ins char/toggle ins mode key | |
48 | #define KEY_NPAGE 0x87 // Next-page key | |
49 | #define KEY_PPAGE 0x88 // Previous-page key | |
50 | #define KEY_END 0x89 // End key | |
51 | #define KEY_BTAB 0x8A // Back tab key | |
52 | #define KEY_F1 0x8B // Function key F1 | |
53 | #define KEY_F(n) (KEY_F1+(n)-1) // Space for additional 12 function keys | |
54 | ||
55 | ||
56 | struct fkey_tbl_s { | |
57 | const FLASH char *sequence; /* ESC Sequence */ | |
58 | int code; /* Keycode */ | |
59 | }; | |
60 | ||
61 | //typedef const FLASH struct fkey_tbl_s fkey_tbl_t; | |
62 | ||
63 | #define FKEY_TBL_ITEM(_seq, _code) { FSTR(#_seq), _code } | |
64 | ||
65 | ||
66 | ||
67 | static const FLASH struct fkey_tbl_s fkey_table[] = { | |
68 | ||
69 | FKEY_TBL_ITEM(B, KEY_DOWN), // Down arrow key | |
70 | FKEY_TBL_ITEM(A, KEY_UP), // Up arrow key | |
71 | FKEY_TBL_ITEM(D, KEY_LEFT), // Left arrow key | |
72 | FKEY_TBL_ITEM(C, KEY_RIGHT), // Right arrow key | |
73 | FKEY_TBL_ITEM(1~, KEY_HOME), // Home key | |
74 | FKEY_TBL_ITEM(3~, KEY_DC), // Delete character key | |
75 | FKEY_TBL_ITEM(2~, KEY_IC), // Ins char/toggle ins mode key | |
76 | FKEY_TBL_ITEM(6~, KEY_NPAGE), // Next-page key | |
77 | FKEY_TBL_ITEM(5~, KEY_PPAGE), // Previous-page key | |
78 | FKEY_TBL_ITEM(4~, KEY_END), // End key | |
79 | FKEY_TBL_ITEM(Z, KEY_BTAB), // Back tab key | |
80 | /* VT400: */ | |
81 | FKEY_TBL_ITEM(11~, KEY_F(1)), // Function key F1 | |
82 | FKEY_TBL_ITEM(12~, KEY_F(2)), // Function key F2 | |
83 | FKEY_TBL_ITEM(13~, KEY_F(3)), // Function key F3 | |
84 | FKEY_TBL_ITEM(14~, KEY_F(4)), // Function key F4 | |
85 | FKEY_TBL_ITEM(15~, KEY_F(5)), // Function key F5 | |
86 | /* Linux consoe */ | |
87 | FKEY_TBL_ITEM([A, KEY_F(1)), // Function key F1 | |
88 | FKEY_TBL_ITEM([B, KEY_F(2)), // Function key F2 | |
89 | FKEY_TBL_ITEM([C, KEY_F(3)), // Function key F3 | |
90 | FKEY_TBL_ITEM([D, KEY_F(4)), // Function key F4 | |
91 | FKEY_TBL_ITEM([E, KEY_F(5)), // Function key F5 | |
92 | ||
93 | FKEY_TBL_ITEM(17~, KEY_F(6)), // Function key F6 | |
94 | FKEY_TBL_ITEM(18~, KEY_F(7)), // Function key F7 | |
95 | FKEY_TBL_ITEM(19~, KEY_F(8)), // Function key F8 | |
96 | FKEY_TBL_ITEM(20~, KEY_F(9)), // Function key F9 | |
97 | FKEY_TBL_ITEM(21~, KEY_F(10)), // Function key F10 | |
98 | FKEY_TBL_ITEM(23~, KEY_F(11)), // Function key F11 | |
99 | FKEY_TBL_ITEM(24~, KEY_F(12)), // Function key F12 | |
100 | { NULL } /* Mark end of table */ | |
101 | }; | |
102 | ||
103 | ||
104 | ||
105 | typedef enum { | |
106 | STATE_GROUND, | |
107 | STATE_ESCAPE, | |
108 | STATE_CSI_ENTRY | |
109 | } vtparse_state_t; | |
110 | ||
111 | #define CHB_SIZE 15 | |
112 | ||
113 | static | |
114 | int vt_parse (void) | |
115 | { | |
116 | static vtparse_state_t state = STATE_GROUND; | |
117 | char buf[CHB_SIZE+1]; | |
118 | uint8_t param[2]; | |
119 | uint8_t i_buf; | |
120 | uint8_t i_param; | |
121 | int ch; | |
122 | ||
123 | ||
124 | while (1) { | |
125 | ch = my_getchar(1); | |
126 | // debug_getch(state, ch); | |
127 | ||
128 | switch (state) { | |
129 | case STATE_GROUND: | |
130 | if (ch == ESC) { | |
131 | state = STATE_ESCAPE; | |
132 | continue; | |
133 | } | |
134 | if (ch == 0x7F) // BACKSPACE on VT200 sends DEL char | |
135 | ch = KEY_BACKSPACE; // map it to '\b' | |
136 | break; | |
137 | case STATE_ESCAPE: | |
138 | if (ch < 0) | |
139 | continue; | |
140 | ||
141 | if (ch == '[') { | |
142 | state = STATE_CSI_ENTRY; | |
143 | param[0] = param[1] = 0; | |
144 | i_buf = 0; | |
145 | i_param = 0; | |
146 | continue; | |
147 | } | |
148 | state = STATE_GROUND; | |
149 | break; | |
150 | case STATE_CSI_ENTRY: | |
151 | if (ch < 0) | |
152 | continue; | |
153 | ||
154 | buf[i_buf] = ch; | |
155 | if (i_buf < CHB_SIZE) | |
156 | i_buf++; | |
157 | if (ch == ';') { | |
158 | i_param++; | |
159 | continue; | |
160 | } | |
161 | if (isdigit(ch)) { | |
162 | if (i_param < 2) | |
163 | param[i_param] = param[i_param] * 10 + ch - '0'; | |
164 | continue; | |
165 | } | |
166 | if (ch >= '@' && ch <= '~' && ch != '[') { | |
167 | buf[i_buf] = '\0'; | |
168 | int_fast8_t i = 0; | |
169 | while (fkey_table[i].sequence) { | |
170 | if (! strcmp_P (buf, fkey_table[i].sequence)) { | |
171 | ch = fkey_table[i].code; | |
172 | break; | |
173 | } | |
174 | i++; | |
175 | } | |
176 | if (fkey_table[i].sequence == NULL) { | |
177 | ch = '$'; /* KEY_ESCAPE; */ | |
178 | } | |
179 | } | |
180 | state = STATE_GROUND; | |
181 | break; | |
182 | } | |
183 | break; /* while */ | |
184 | } | |
185 | ||
186 | return ch; | |
187 | } | |
188 | ||
189 | /************************************************************************************************/ | |
190 | ||
191 | ||
d684c216 L |
192 | char console_buffer[CONFIG_SYS_CBSIZE + 1]; /* console I/O buffer */ |
193 | ||
8506d791 | 194 | #ifndef CONFIG_CMDLINE_EDITING |
d684c216 L |
195 | static const FLASH char erase_seq[] = "\b \b"; /* erase sequence */ |
196 | static const FLASH char tab_seq[] = " "; /* used to expand TABs */ | |
197 | ||
d684c216 L |
198 | static char *delete_char (char *buffer, char *p, int *colp, int *np, int plen) |
199 | { | |
200 | char *s; | |
201 | ||
202 | if (*np == 0) | |
203 | return p; | |
204 | ||
205 | if (*(--p) == '\t') { /* will retype the whole line */ | |
206 | while (*colp > plen) { | |
207 | my_puts_P(erase_seq); | |
208 | (*colp)--; | |
209 | } | |
210 | for (s = buffer; s < p; ++s) { | |
211 | if (*s == '\t') { | |
212 | my_puts_P(tab_seq + ((*colp) & 07)); | |
213 | *colp += 8 - ((*colp) & 07); | |
214 | } else { | |
215 | ++(*colp); | |
216 | putchar(*s); | |
217 | } | |
218 | } | |
219 | } else { | |
220 | my_puts_P(erase_seq); | |
221 | (*colp)--; | |
222 | } | |
223 | (*np)--; | |
224 | ||
225 | return p; | |
226 | } | |
227 | #endif /* CONFIG_CMDLINE_EDITING */ | |
228 | ||
229 | ||
230 | #ifdef CONFIG_CMDLINE_EDITING | |
231 | ||
232 | /* | |
233 | * cmdline-editing related codes from vivi. | |
234 | * Author: Janghoon Lyu <nandy@mizi.com> | |
235 | */ | |
236 | ||
e1a50c19 L |
237 | static void putnstr(char *str, int n) |
238 | { | |
239 | /* printf_P(PSTR("%.*s"), (int)n, str) */ | |
8591c65b | 240 | while (n-- && *str) |
e1a50c19 L |
241 | putchar(*str++); |
242 | } | |
d684c216 | 243 | |
e1a50c19 L |
244 | |
245 | #define CTL_CH(c) ((c) - 'a' + 1) | |
d684c216 | 246 | #define CTL_BACKSPACE ('\b') |
e1a50c19 L |
247 | #define DEL ((char)255) |
248 | #define DEL7 ((char)127) | |
d684c216 L |
249 | |
250 | #define getcmd_putch(ch) putchar(ch) | |
8506d791 | 251 | #define getcmd_getch() vt_parse() |
d684c216 L |
252 | #define getcmd_cbeep() getcmd_putch('\a') |
253 | ||
a8b4c964 | 254 | #define HIST_MAX 20 |
d684c216 | 255 | |
a8b4c964 L |
256 | static int_fast8_t hist_max; |
257 | static int_fast8_t hist_add_idx; | |
258 | static int_fast8_t hist_cur = -1; | |
d684c216 L |
259 | |
260 | static char *hist_list[HIST_MAX]; | |
d684c216 | 261 | |
d684c216 L |
262 | static void cread_add_to_hist(char *line) |
263 | { | |
a8b4c964 L |
264 | if (hist_max) { |
265 | int_fast8_t last = hist_add_idx; | |
266 | if (--last < 0) | |
267 | last = hist_max; | |
d684c216 | 268 | |
a8b4c964 L |
269 | if (!strcmp(line, hist_list[last])) |
270 | return; | |
271 | } | |
d684c216 | 272 | |
a8b4c964 L |
273 | char *p = strdup(line); |
274 | if (p) { | |
275 | free(hist_list[hist_add_idx]); | |
276 | hist_list[hist_add_idx] = p; | |
d684c216 | 277 | |
a8b4c964 L |
278 | if (++hist_add_idx >= HIST_MAX) |
279 | hist_add_idx = 0; | |
280 | ||
281 | if (hist_add_idx > hist_max) | |
282 | hist_max = hist_add_idx; | |
283 | } | |
d684c216 L |
284 | } |
285 | ||
286 | static char *hist_prev(void) | |
287 | { | |
288 | char *ret; | |
a8b4c964 | 289 | int_fast8_t old_cur; |
d684c216 L |
290 | |
291 | if (hist_cur < 0) | |
292 | return NULL; | |
293 | ||
294 | old_cur = hist_cur; | |
295 | if (--hist_cur < 0) | |
296 | hist_cur = hist_max; | |
297 | ||
298 | if (hist_cur == hist_add_idx) { | |
299 | hist_cur = old_cur; | |
300 | ret = NULL; | |
301 | } else { | |
302 | ret = hist_list[hist_cur]; | |
303 | } | |
304 | ||
305 | return ret; | |
306 | } | |
307 | ||
308 | static char *hist_next(void) | |
309 | { | |
310 | char *ret; | |
311 | ||
312 | if (hist_cur < 0) | |
313 | return NULL; | |
314 | ||
315 | if (hist_cur == hist_add_idx) | |
316 | return NULL; | |
317 | ||
318 | if (++hist_cur > hist_max) | |
319 | hist_cur = 0; | |
320 | ||
321 | if (hist_cur == hist_add_idx) | |
322 | ret = ""; | |
323 | else | |
324 | ret = hist_list[hist_cur]; | |
325 | ||
326 | return ret; | |
327 | } | |
328 | ||
d684c216 | 329 | |
e1a50c19 L |
330 | #define BEGINNING_OF_LINE() { \ |
331 | while (num) { \ | |
332 | getcmd_putch(CTL_BACKSPACE); \ | |
333 | num--; \ | |
334 | } \ | |
d684c216 L |
335 | } |
336 | ||
e1a50c19 L |
337 | #define ERASE_TO_EOL() { \ |
338 | if (num < eol_num) { \ | |
339 | /* printf_P(PSTR("%*S"), (int)(eol_num - num), PSTR("")); */ \ | |
340 | print_blanks(eol_num - num); \ | |
341 | do { \ | |
342 | getcmd_putch(CTL_BACKSPACE); \ | |
343 | } while (--eol_num > num); \ | |
344 | } \ | |
d684c216 L |
345 | } |
346 | ||
e1a50c19 L |
347 | #define REFRESH_TO_EOL() { \ |
348 | if (num < eol_num) { \ | |
349 | wlen = eol_num - num; \ | |
350 | putnstr(buf + num, wlen); \ | |
351 | num = eol_num; \ | |
352 | } \ | |
d684c216 L |
353 | } |
354 | ||
a8b4c964 L |
355 | static void cread_add_char(char ichar, bool insert, uint_fast8_t *num, |
356 | uint_fast8_t *eol_num, char *buf, uint_fast8_t len) | |
d684c216 | 357 | { |
a8b4c964 | 358 | uint_fast8_t wlen; |
d684c216 L |
359 | |
360 | /* room ??? */ | |
361 | if (insert || *num == *eol_num) { | |
362 | if (*eol_num > len - 1) { | |
363 | getcmd_cbeep(); | |
364 | return; | |
365 | } | |
366 | (*eol_num)++; | |
367 | } | |
368 | ||
369 | if (insert) { | |
370 | wlen = *eol_num - *num; | |
371 | if (wlen > 1) | |
372 | memmove(&buf[*num+1], &buf[*num], wlen-1); | |
373 | ||
374 | buf[*num] = ichar; | |
375 | putnstr(buf + *num, wlen); | |
376 | (*num)++; | |
377 | while (--wlen) | |
378 | getcmd_putch(CTL_BACKSPACE); | |
379 | } else { | |
380 | /* echo the character */ | |
381 | wlen = 1; | |
382 | buf[*num] = ichar; | |
383 | putnstr(buf + *num, wlen); | |
384 | (*num)++; | |
385 | } | |
386 | } | |
387 | ||
a8b4c964 L |
388 | static void cread_add_str(char *str, int strsize, bool insert, |
389 | uint_fast8_t *num, uint_fast8_t *eol_num, | |
390 | char *buf, uint_fast8_t len) | |
d684c216 L |
391 | { |
392 | while (strsize--) { | |
393 | cread_add_char(*str, insert, num, eol_num, buf, len); | |
394 | str++; | |
395 | } | |
396 | } | |
397 | ||
a8b4c964 | 398 | static int cread_line(const FLASH char *const prompt, char *buf, uint_fast8_t *len) |
d684c216 | 399 | { |
a8b4c964 L |
400 | uint_fast8_t num = 0; |
401 | uint_fast8_t eol_num = 0; | |
402 | uint_fast8_t wlen; | |
8506d791 | 403 | int ichar; |
a8b4c964 | 404 | bool insert = 1; |
d684c216 L |
405 | int init_len = strlen(buf); |
406 | ||
407 | (void) prompt; | |
408 | ||
409 | if (init_len) | |
410 | cread_add_str(buf, init_len, 1, &num, &eol_num, buf, *len); | |
411 | ||
412 | while (1) { | |
413 | ichar = getcmd_getch(); | |
414 | ||
415 | if ((ichar == '\n') || (ichar == '\r')) { | |
416 | putchar('\n'); | |
417 | break; | |
418 | } | |
419 | ||
d684c216 L |
420 | |
421 | switch (ichar) { | |
d684c216 | 422 | |
8506d791 | 423 | case KEY_HOME: |
d684c216 L |
424 | case CTL_CH('a'): |
425 | BEGINNING_OF_LINE(); | |
426 | break; | |
a8b4c964 L |
427 | case CTL_CH('c'): /* ^C - break */ |
428 | *buf = '\0'; /* discard input */ | |
d684c216 | 429 | return -1; |
8506d791 | 430 | case KEY_RIGHT: |
a8b4c964 | 431 | case CTL_CH('f'): /* forward-char */ |
d684c216 L |
432 | if (num < eol_num) { |
433 | getcmd_putch(buf[num]); | |
434 | num++; | |
435 | } | |
436 | break; | |
8506d791 | 437 | case KEY_LEFT: |
a8b4c964 | 438 | case CTL_CH('b'): /* backward-char */ |
d684c216 L |
439 | if (num) { |
440 | getcmd_putch(CTL_BACKSPACE); | |
441 | num--; | |
442 | } | |
443 | break; | |
8506d791 | 444 | case KEY_DC: |
a8b4c964 | 445 | case CTL_CH('d'): /* delete-char */ |
d684c216 L |
446 | if (num < eol_num) { |
447 | wlen = eol_num - num - 1; | |
448 | if (wlen) { | |
449 | memmove(&buf[num], &buf[num+1], wlen); | |
450 | putnstr(buf + num, wlen); | |
451 | } | |
452 | ||
453 | getcmd_putch(' '); | |
454 | do { | |
455 | getcmd_putch(CTL_BACKSPACE); | |
456 | } while (wlen--); | |
457 | eol_num--; | |
458 | } | |
459 | break; | |
a8b4c964 | 460 | case CTL_CH('k'): /* kill-line */ |
d684c216 L |
461 | ERASE_TO_EOL(); |
462 | break; | |
ed7d7fd3 | 463 | case KEY_END: |
d684c216 L |
464 | case CTL_CH('e'): |
465 | REFRESH_TO_EOL(); | |
466 | break; | |
8506d791 | 467 | case KEY_IC: |
d684c216 L |
468 | case CTL_CH('o'): |
469 | insert = !insert; | |
470 | break; | |
471 | case CTL_CH('x'): | |
a8b4c964 | 472 | case CTL_CH('u'): /* kill-whole-line */ |
d684c216 L |
473 | BEGINNING_OF_LINE(); |
474 | ERASE_TO_EOL(); | |
475 | break; | |
476 | case DEL: | |
477 | case DEL7: | |
a8b4c964 | 478 | case 8: /* backward-delete-char */ |
d684c216 L |
479 | if (num) { |
480 | wlen = eol_num - num; | |
481 | num--; | |
482 | memmove(&buf[num], &buf[num+1], wlen); | |
483 | getcmd_putch(CTL_BACKSPACE); | |
484 | putnstr(buf + num, wlen); | |
485 | getcmd_putch(' '); | |
486 | do { | |
487 | getcmd_putch(CTL_BACKSPACE); | |
488 | } while (wlen--); | |
489 | eol_num--; | |
490 | } | |
491 | break; | |
8506d791 | 492 | case KEY_UP: |
a8b4c964 | 493 | case CTL_CH('p'): /* previous-history */ |
8506d791 | 494 | case KEY_DOWN: |
a8b4c964 | 495 | case CTL_CH('n'): /* next-history */ |
d684c216 L |
496 | { |
497 | char *hline; | |
498 | ||
8506d791 | 499 | if (ichar == CTL_CH('p') || ichar == KEY_UP) |
d684c216 L |
500 | hline = hist_prev(); |
501 | else | |
502 | hline = hist_next(); | |
503 | ||
504 | if (!hline) { | |
505 | getcmd_cbeep(); | |
506 | continue; | |
507 | } | |
508 | ||
509 | /* nuke the current line */ | |
510 | /* first, go home */ | |
511 | BEGINNING_OF_LINE(); | |
512 | ||
513 | /* erase to end of line */ | |
514 | ERASE_TO_EOL(); | |
515 | ||
516 | /* copy new line into place and display */ | |
517 | strcpy(buf, hline); | |
518 | eol_num = strlen(buf); | |
519 | REFRESH_TO_EOL(); | |
520 | continue; | |
521 | } | |
522 | #ifdef CONFIG_AUTO_COMPLETE | |
523 | case '\t': { | |
524 | int num2, col; | |
525 | ||
526 | /* do not autocomplete when in the middle */ | |
527 | if (num < eol_num) { | |
528 | getcmd_cbeep(); | |
529 | break; | |
530 | } | |
531 | ||
532 | buf[num] = '\0'; | |
533 | col = strlen_P(prompt) + eol_num; | |
534 | num2 = num; | |
535 | if (cmd_auto_complete(prompt, buf, &num2, &col)) { | |
536 | col = num2 - num; | |
537 | num += col; | |
538 | eol_num += col; | |
539 | } | |
540 | break; | |
541 | } | |
542 | #endif | |
543 | default: | |
8506d791 L |
544 | if (isprint(ichar)) |
545 | cread_add_char(ichar, insert, &num, &eol_num, buf, | |
546 | *len); | |
d684c216 L |
547 | break; |
548 | } | |
549 | } | |
550 | *len = eol_num; | |
551 | buf[eol_num] = '\0'; /* lose the newline */ | |
552 | ||
8506d791 | 553 | if (buf[0] /* && buf[0] != CREAD_HIST_CHAR */) |
d684c216 L |
554 | cread_add_to_hist(buf); |
555 | hist_cur = hist_add_idx; | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | #endif /* CONFIG_CMDLINE_EDITING */ | |
561 | ||
562 | /****************************************************************************/ | |
563 | ||
564 | static int cli_readline_into_buffer(const FLASH char *const prompt, char *buffer) | |
565 | { | |
566 | char *p = buffer; | |
567 | #ifdef CONFIG_CMDLINE_EDITING | |
a8b4c964 | 568 | uint_fast8_t len = CONFIG_SYS_CBSIZE; |
d684c216 | 569 | int rc; |
d684c216 L |
570 | |
571 | if (prompt) | |
572 | my_puts_P(prompt); | |
573 | ||
574 | rc = cread_line(prompt, p, &len); | |
575 | return rc < 0 ? rc : (int) len; | |
576 | ||
577 | #else /* CONFIG_CMDLINE_EDITING */ | |
578 | char *p_buf = p; | |
579 | int n = 0; /* buffer index */ | |
580 | int plen = 0; /* prompt length */ | |
581 | int col; /* output column cnt */ | |
582 | char c; | |
583 | ||
584 | /* print prompt */ | |
585 | if (prompt) { | |
586 | plen = strlen_P(prompt); | |
587 | my_puts_P(prompt); | |
588 | } | |
589 | col = plen; | |
590 | ||
591 | for (;;) { | |
592 | ||
424b184a | 593 | c = my_getchar(1); |
d684c216 L |
594 | |
595 | /* | |
596 | * Special character handling | |
597 | */ | |
598 | switch (c) { | |
599 | case '\r': /* Enter */ | |
600 | case '\n': | |
601 | *p = '\0'; | |
602 | my_puts_P(PSTR("\r\n")); | |
603 | return p - p_buf; | |
604 | ||
605 | case '\0': /* nul */ | |
606 | continue; | |
607 | ||
608 | case 0x03: /* ^C - break */ | |
609 | p_buf[0] = '\0'; /* discard input */ | |
610 | return -1; | |
611 | ||
612 | case 0x15: /* ^U - erase line */ | |
613 | while (col > plen) { | |
614 | my_puts_P(erase_seq); | |
615 | --col; | |
616 | } | |
617 | p = p_buf; | |
618 | n = 0; | |
619 | continue; | |
620 | ||
621 | case 0x17: /* ^W - erase word */ | |
622 | p = delete_char(p_buf, p, &col, &n, plen); | |
623 | while ((n > 0) && (*p != ' ')) | |
624 | p = delete_char(p_buf, p, &col, &n, plen); | |
625 | continue; | |
626 | ||
627 | case 0x08: /* ^H - backspace */ | |
628 | case 0x7F: /* DEL - backspace */ | |
629 | p = delete_char(p_buf, p, &col, &n, plen); | |
630 | continue; | |
631 | ||
632 | default: | |
633 | /* | |
634 | * Must be a normal character then | |
635 | */ | |
636 | if (n < CONFIG_SYS_CBSIZE-2) { | |
637 | if (c == '\t') { /* expand TABs */ | |
638 | #ifdef CONFIG_AUTO_COMPLETE | |
639 | /* | |
640 | * if auto completion triggered just | |
641 | * continue | |
642 | */ | |
643 | *p = '\0'; | |
644 | if (cmd_auto_complete(prompt, | |
645 | console_buffer, | |
646 | &n, &col)) { | |
647 | p = p_buf + n; /* reset */ | |
648 | continue; | |
649 | } | |
650 | #endif | |
651 | my_puts_P(tab_seq + (col & 07)); | |
652 | col += 8 - (col & 07); | |
653 | } else { | |
d684c216 | 654 | ++col; |
cb52e1e0 | 655 | putchar(c); |
d684c216 L |
656 | } |
657 | *p++ = c; | |
658 | ++n; | |
659 | } else { /* Buffer full */ | |
660 | putchar('\a'); | |
661 | } | |
662 | } | |
663 | } | |
664 | #endif /* CONFIG_CMDLINE_EDITING */ | |
665 | } | |
666 | ||
667 | int cli_readline(const FLASH char *const prompt) | |
668 | { | |
669 | /* | |
670 | * If console_buffer isn't 0-length the user will be prompted to modify | |
671 | * it instead of entering it from scratch as desired. | |
672 | */ | |
673 | console_buffer[0] = '\0'; | |
674 | ||
675 | return cli_readline_into_buffer(prompt, console_buffer); | |
676 | } |