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amiro-os / core / src / aos_shell.c @ 9ff01927

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1 e545e620 Thomas Schöpping
/*
2
AMiRo-OS is an operating system designed for the Autonomous Mini Robot (AMiRo) platform.
3
Copyright (C) 2016..2018  Thomas Schöpping et al.
4

5
This program is free software: you can redistribute it and/or modify
6
it under the terms of the GNU General Public License as published by
7
the Free Software Foundation, either version 3 of the License, or
8
(at your option) any later version.
9

10
This program is distributed in the hope that it will be useful,
11
but WITHOUT ANY WARRANTY; without even the implied warranty of
12
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
GNU General Public License for more details.
14

15
You should have received a copy of the GNU General Public License
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along with this program.  If not, see <http://www.gnu.org/licenses/>.
17
*/
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19 53710ca3 Marc Rothmann
/**
20
 * @file    aos_shell.c
21
 * @brief   Shell code.
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 * @details Shell code as well as shell related channels and streams.
23
 *
24
 * @addtogroup aos_shell
25
 * @{
26
 */
27
28 e545e620 Thomas Schöpping
#include <aos_shell.h>
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30 ba516b61 Thomas Schöpping
#if (AMIROOS_CFG_SHELL_ENABLE == true)
31 e545e620 Thomas Schöpping
#include <aos_debug.h>
32
#include <aos_time.h>
33
#include <aos_system.h>
34
#include <string.h>
35 ba516b61 Thomas Schöpping
36
/**
37
 * @brief   Event mask to be set on OS related events.
38
 */
39
#define AOS_SHELL_EVENTMASK_OS                  EVENT_MASK(0)
40
41
/**
42
 * @brief   Event mask to be set on a input event.
43
 */
44
#define AOS_SHELL_EVENTMASK_INPUT               EVENT_MASK(1)
45
46
/**
47
 * @brief   Implementation of the BaseAsynchronous write() method (inherited from BaseSequentialStream).
48
 */
49
static size_t _channelwrite(void *instance, const uint8_t *bp, size_t n)
50
{
51
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_OUTPUT_ENABLED) {
52 dd8738ea Thomas Schöpping
    return streamWrite(((AosShellChannel*)instance)->asyncchannel, bp, n);
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  } else {
54
    return 0;
55
  }
56
}
57
58
/**
59
 * @brief   Implementation of the BaseAsynchronous read() method (inherited from BaseSequentialStream).
60
 */
61
static size_t _channelread(void *instance, uint8_t *bp, size_t n)
62
{
63 dd8738ea Thomas Schöpping
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_INPUT_ENABLED) {
64
    return streamRead(((AosShellChannel*)instance)->asyncchannel, bp, n);
65
  } else {
66
    return 0;
67
  }
68 ba516b61 Thomas Schöpping
}
69
70
/**
71
 * @brief   Implementation of the BaseAsynchronous put() method (inherited from BaseSequentialStream).
72
 */
73
static msg_t _channelput(void *instance, uint8_t b)
74
{
75
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_OUTPUT_ENABLED) {
76 dd8738ea Thomas Schöpping
    return streamPut(((AosShellChannel*)instance)->asyncchannel, b);
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  } else {
78
    return MSG_RESET;
79
  }
80
}
81
82
/**
83
 * @brief   Implementation of the BaseAsynchronous get() method (inherited from BaseSequentialStream).
84
 */
85
static msg_t _channelget(void *instance)
86
{
87 dd8738ea Thomas Schöpping
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_INPUT_ENABLED) {
88
    return streamGet(((AosShellChannel*)instance)->asyncchannel);
89
  } else {
90
    return MSG_RESET;
91
  }
92 ba516b61 Thomas Schöpping
}
93
94
/**
95
 * @brief   Implementation of the BaseAsynchronous putt() method.
96
 */
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static msg_t _channelputt(void *instance, uint8_t b, sysinterval_t time)
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{
99
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_OUTPUT_ENABLED) {
100 dd8738ea Thomas Schöpping
    return chnPutTimeout(((AosShellChannel*)instance)->asyncchannel, b, time);
101 ba516b61 Thomas Schöpping
  } else {
102
    return MSG_RESET;
103
  }
104
}
105
106
/**
107
 * @brief   Implementation of the BaseAsynchronous gett() method.
108
 */
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static msg_t _channelgett(void *instance, sysinterval_t time)
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{
111 dd8738ea Thomas Schöpping
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_INPUT_ENABLED) {
112
    return chnGetTimeout(((AosShellChannel*)instance)->asyncchannel, time);
113
  } else {
114
    return MSG_RESET;
115
  }
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}
117
118
/**
119
 * @brief   Implementation of the BaseAsynchronous writet() method.
120
 */
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static size_t _channelwritet(void *instance, const uint8_t *bp, size_t n, sysinterval_t time)
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{
123
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_OUTPUT_ENABLED) {
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    return chnWriteTimeout(((AosShellChannel*)instance)->asyncchannel, bp, n, time);
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  } else {
126
    return 0;
127
  }
128
}
129
130
/**
131
 * @brief   Implementation of the BaseAsynchronous readt() method.
132
 */
133 2c99037f Marc Rothmann
static size_t _channelreadt(void *instance, uint8_t *bp, size_t n, sysinterval_t time)
134 ba516b61 Thomas Schöpping
{
135 dd8738ea Thomas Schöpping
  if (((AosShellChannel*)instance)->flags & AOS_SHELLCHANNEL_INPUT_ENABLED) {
136
    return chnReadTimeout(((AosShellChannel*)instance)->asyncchannel, bp, n, time);
137
  } else {
138
    return 0;
139
  }
140 ba516b61 Thomas Schöpping
}
141
142 2c99037f Marc Rothmann
/**
143
 * @brief   Implementation of the BaseAsynchronousChannel ctl() method.
144
 */
145
static msg_t _channelctl(void *instance, unsigned int operation, void *arg) {
146
  (void) instance;
147
148
  switch (operation) {
149
  case CHN_CTL_NOP:
150
    osalDbgCheck(arg == NULL);
151
    break;
152
  case CHN_CTL_INVALID:
153
    osalDbgAssert(false, "invalid CTL operation");
154
    break;
155
  default:
156
    break;
157
  }
158
  return MSG_OK;
159
}
160
161 ba516b61 Thomas Schöpping
static const struct AosShellChannelVMT _channelvmt = {
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  (size_t) 0,
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  _channelwrite,
164
  _channelread,
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  _channelput,
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  _channelget,
167
  _channelputt,
168
  _channelgett,
169
  _channelwritet,
170
  _channelreadt,
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  _channelctl,
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};
173
174
static size_t _streamwrite(void *instance, const uint8_t *bp, size_t n)
175
{
176
  aosDbgCheck(instance != NULL);
177
178
  // local variables
179
  AosShellChannel* channel = ((AosShellStream*)instance)->channel;
180
  size_t bytes;
181
  size_t maxbytes = 0;
182
183
  // iterate through the list of channels
184
  while (channel != NULL) {
185
    bytes = streamWrite(channel, bp, n);
186
    maxbytes = (bytes > maxbytes) ? bytes : maxbytes;
187
    channel = channel->next;
188
  }
189
190
  return maxbytes;
191
}
192
193
static size_t _stremread(void *instance, uint8_t *bp, size_t n)
194
{
195
  (void)instance;
196
  (void)bp;
197
  (void)n;
198
199
  return 0;
200
}
201
202
static msg_t _streamput(void *instance, uint8_t b)
203
{
204
  aosDbgCheck(instance != NULL);
205
206
  // local variables
207
  AosShellChannel* channel = ((AosShellStream*)instance)->channel;
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  msg_t ret = MSG_OK;
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210
  // iterate through the list of channels
211
  while (channel != NULL) {
212 dd8738ea Thomas Schöpping
    msg_t ret_ = streamPut(channel, b);
213
    ret = (ret_ < ret) ? ret_ : ret;
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    channel = channel->next;
215
  }
216
217 dd8738ea Thomas Schöpping
  return ret;
218 ba516b61 Thomas Schöpping
}
219
220
static msg_t _streamget(void *instance)
221
{
222
  (void)instance;
223
224
  return 0;
225
}
226
227
static const struct AosShellStreamVMT _streamvmt = {
228 0128be0f Marc Rothmann
  (size_t) 0,
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  _streamwrite,
230
  _stremread,
231
  _streamput,
232
  _streamget,
233
};
234
235 e545e620 Thomas Schöpping
/**
236
 * @brief   Enumerator of special keyboard keys.
237
 */
238
typedef enum special_key {
239
  KEY_UNKNOWN,      /**< any/unknow key */
240
  KEY_AMBIGUOUS,    /**< key is ambiguous */
241
  KEY_TAB,          /**< tabulator key */
242
  KEY_ESCAPE,       /**< escape key */
243
  KEY_BACKSPACE,    /**< backspace key */
244
  KEY_INSERT,       /**< insert key */
245
  KEY_DELETE,       /**< delete key */
246
  KEY_HOME,         /**< home key */
247
  KEY_END,          /**< end key */
248
  KEY_PAGE_UP,      /**< page up key */
249
  KEY_PAGE_DOWN,    /**< page down key */
250
  KEY_ARROW_UP,     /**< arrow up key */
251
  KEY_ARROW_DOWN,   /**< arrow down key */
252
  KEY_ARROW_LEFT,   /**< arrow left key */
253
  KEY_ARROW_RIGHT,  /**< arrow right key */
254
} special_key_t;
255
256
/**
257
 * @brief   Enumerator for case (in)sensitive character matching.
258
 */
259
typedef enum charmatch {
260
  CHAR_MATCH_NOT    = 0,  /**< Characters do not match at all. */
261
  CHAR_MATCH_NCASE  = 1,  /**< Characters would match case insensitive. */
262
  CHAR_MATCH_CASE   = 2,  /**< Characters do match with case. */
263
} charmatch_t;
264
265
/**
266
 * @brief   Print the shell prompt
267
 * @details Depending on the configuration flags, the system uptime is printed before the prompt string.
268
 *
269
 * @param[in] shell   Pointer to the shell object.
270
 */
271
static void _printPrompt(aos_shell_t* shell)
272
{
273
  aosDbgCheck(shell != NULL);
274
275 8399aeae Thomas Schöpping
  // print some time informattion before prompt if configured
276
  if (shell->config & (AOS_SHELL_CONFIG_PROMPT_UPTIME | AOS_SHELL_CONFIG_PROMPT_DATETIME)) {
277
    // printf the system uptime
278
    if ((shell->config & (AOS_SHELL_CONFIG_PROMPT_UPTIME | AOS_SHELL_CONFIG_PROMPT_DATETIME)) == AOS_SHELL_CONFIG_PROMPT_UPTIME) {
279
      // get current system uptime
280
      aos_timestamp_t uptime;
281
      aosSysGetUptime(&uptime);
282
283
      chprintf((BaseSequentialStream*)&shell->stream, "[%01u:%02u:%02u:%02u:%03u:%03u] ",
284
               (uint32_t)(uptime / MICROSECONDS_PER_DAY),
285
               (uint8_t)(uptime % MICROSECONDS_PER_DAY / MICROSECONDS_PER_HOUR),
286
               (uint8_t)(uptime % MICROSECONDS_PER_HOUR / MICROSECONDS_PER_MINUTE),
287
               (uint8_t)(uptime % MICROSECONDS_PER_MINUTE / MICROSECONDS_PER_SECOND),
288
               (uint16_t)(uptime % MICROSECONDS_PER_SECOND / MICROSECONDS_PER_MILLISECOND),
289
               (uint16_t)(uptime % MICROSECONDS_PER_MILLISECOND / MICROSECONDS_PER_MICROSECOND));
290
    }
291
    else if ((shell->config & (AOS_SHELL_CONFIG_PROMPT_UPTIME | AOS_SHELL_CONFIG_PROMPT_DATETIME)) == AOS_SHELL_CONFIG_PROMPT_DATETIME) {
292
      // get current RTC time
293
      struct tm dt;
294
      aosSysGetDateTime(&dt);
295
      chprintf((BaseSequentialStream*)&shell->stream, "[%02u-%02u-%04u|%02u:%02u:%02u] ",
296
               dt.tm_mday,
297
               dt.tm_mon + 1,
298
               dt.tm_year + 1900,
299
               dt.tm_hour,
300
               dt.tm_min,
301
               dt.tm_sec);
302
    }
303
    else {
304
      aosDbgAssert(false);
305
    }
306 e545e620 Thomas Schöpping
  }
307
308
  // print the actual prompt string
309
  if (shell->prompt && !(shell->config & AOS_SHELL_CONFIG_PROMPT_MINIMAL)) {
310 ba516b61 Thomas Schöpping
    chprintf((BaseSequentialStream*)&shell->stream, "%s$ ", shell->prompt);
311 e545e620 Thomas Schöpping
  } else {
312 ba516b61 Thomas Schöpping
    chprintf((BaseSequentialStream*)&shell->stream, "%>$ ");
313 e545e620 Thomas Schöpping
  }
314
315
  return;
316
}
317
318
/**
319
 * @brief   Interprete a escape sequence
320
 *
321
 * @param[in] seq   Character sequence to interprete.
322
 *                  Must be terminated by NUL byte.
323
 *
324
 * @return          A @p special_key value.
325
 */
326
static special_key_t _interpreteEscapeSequence(const char seq[])
327
{
328
  // local variables
329
  bool ambiguous = false;
330
  int cmp = 0;
331
332
  // TAB
333
  /* not supported yet; use "\x09" instead */
334
335
  // BACKSPACE
336
  /* not supported yet; use "\x08" instead */
337
338
  // ESCAPE
339
  cmp = strcmp(seq, "\x1B");
340
  if (cmp == 0) {
341
    return KEY_ESCAPE;
342
  } else {
343
    ambiguous |= (cmp < 0);
344
  }
345
346
  // INSERT
347
  cmp = strcmp(seq, "\x1B\x5B\x32\x7E");
348
  if (cmp == 0) {
349
    return KEY_INSERT;
350
  } else {
351
    ambiguous |= (cmp < 0);
352
  }
353
354
  // DELETE
355
  cmp = strcmp(seq, "\x1B\x5B\x33\x7E");
356
  if (cmp == 0) {
357
    return KEY_DELETE;
358
  } else {
359
    ambiguous |= (cmp < 0);
360
  }
361
362
  // HOME
363
  cmp = strcmp(seq, "\x1B\x4F\x48");
364
  if (cmp == 0) {
365
    return KEY_HOME;
366
  } else {
367
    ambiguous |= (cmp < 0);
368
  }
369
370
  // END
371
  cmp = strcmp(seq, "\x1B\x4F\x46");
372
  if (cmp == 0) {
373
    return KEY_END;
374
  } else {
375
    ambiguous |= (cmp < 0);
376
  }
377
378
  // PAGE UP
379
  cmp = strcmp(seq, "\x1B\x5B\x35\x7E");
380
  if (cmp == 0) {
381
    return KEY_PAGE_UP;
382
  } else {
383
    ambiguous |= (cmp < 0);
384
  }
385
386
  // PAGE DOWN
387
  cmp = strcmp(seq, "\x1B\x5B\x36\x7E");
388
  if (cmp == 0) {
389
    return KEY_PAGE_DOWN;
390
  } else {
391
    ambiguous |= (cmp < 0);
392
  }
393
394
  // ARROW UP
395
  cmp = strcmp(seq, "\x1B\x5B\x41");
396
  if (cmp == 0) {
397
    return KEY_ARROW_UP;
398
  } else {
399
    ambiguous |= (cmp < 0);
400
  }
401
402
  // ARROW DOWN
403
  cmp = strcmp(seq, "\x1B\x5B\x42");
404
  if (cmp == 0) {
405
    return KEY_ARROW_DOWN;
406
  } else {
407
    ambiguous |= (cmp < 0);
408
  }
409
410
  // ARROW LEFT
411
  cmp = strcmp(seq, "\x1B\x5B\x44");
412
  if (cmp == 0) {
413
    return KEY_ARROW_LEFT;
414
  } else {
415
    ambiguous |= (cmp < 0);
416
  }
417
418
  // ARROW RIGHT
419
  cmp = strcmp(seq, "\x1B\x5B\x43");
420
  if (cmp == 0) {
421
    return KEY_ARROW_RIGHT;
422
  } else {
423
    ambiguous |= (cmp < 0);
424
  }
425
426
  return ambiguous ? KEY_AMBIGUOUS : KEY_UNKNOWN;
427
}
428
429
/**
430
 * @brief   Move the cursor in the terminal
431
 *
432
 * @param[in] shell   Pointer to the shell object.
433
 * @param[in] from    Starting position of the cursor.
434
 * @param[in] to      Target position to move the cursor to.
435
 *
436
 * @return            The number of positions moved.
437
 */
438
static int _moveCursor(aos_shell_t* shell, const size_t from, const size_t to)
439
{
440
  aosDbgCheck(shell != NULL);
441
442
  // local variables
443
  size_t pos = from;
444
445
  // move cursor left by printing backspaces
446
  while (pos > to) {
447 ba516b61 Thomas Schöpping
    streamPut(&shell->stream, '\b');
448 e545e620 Thomas Schöpping
    --pos;
449
  }
450
451
  // move cursor right by printing line content
452
  while (pos < to) {
453 ba516b61 Thomas Schöpping
    streamPut(&shell->stream, shell->line[pos]);
454 e545e620 Thomas Schöpping
    ++pos;
455
  }
456
457
  return (int)pos - (int)from;
458
}
459
460
/**
461
 * @brief   Print content of the shell line
462
 *
463
 * @param[in] shell   Pointer to the shell object.
464
 * @param[in] from    First position to start printing from.
465
 * @param[in] to      Position after the last character to print.
466
 *
467
 * @return            Number of characters printed.
468
 */
469
static inline size_t _printLine(aos_shell_t* shell, const size_t from, const size_t to)
470
{
471
  aosDbgCheck(shell != NULL);
472
473
  // local variables
474
  size_t cnt;
475
476
  for (cnt = 0; from + cnt < to; ++cnt) {
477 ba516b61 Thomas Schöpping
    streamPut(&shell->stream, shell->line[from + cnt]);
478 e545e620 Thomas Schöpping
  }
479
480
  return cnt;
481
}
482
483
/**
484
 * @brief   Compare two characters.
485
 *
486
 * @param[in] lhs       First character to compare.
487
 * @param[in] rhs       Second character to compare.
488
 *
489
 * @return              How well the characters match.
490
 */
491
static inline charmatch_t _charcmp(char lhs, char rhs)
492
{
493
  // if lhs is a upper case letter and rhs is a lower case letter
494
  if (lhs >= 'A' && lhs <= 'Z' && rhs >= 'a' && rhs <= 'z') {
495
    return (lhs == (rhs - 'a' + 'A')) ? CHAR_MATCH_NCASE : CHAR_MATCH_NOT;
496
  }
497
  // if lhs is a lower case letter and rhs is a upper case letter
498
  else if (lhs >= 'a' && lhs <= 'z' && rhs >= 'A' && rhs <= 'Z') {
499
    return ((lhs - 'a' + 'A') == rhs) ? CHAR_MATCH_NCASE : CHAR_MATCH_NOT;
500
  }
501
  // default
502
  else {
503
    return (lhs == rhs) ? CHAR_MATCH_CASE : CHAR_MATCH_NOT;
504
  }
505
}
506
507
/**
508
 * @brief   Maps an character from ASCII to a modified custom encoding.
509
 * @details The custom character encoding is very similar to ASCII and has the following structure:
510
 *          0x00=NULL ... 0x40='@' (identically to ASCII)
511
 *          0x4A='a'; 0x4B='A'; 0x4C='b'; 0x4D='B' ... 0x73='z'; 0x74='Z' (custom letter order)
512
 *          0x75='[' ... 0x7A='`' (0x5B..0x60 is ASCII)
513
 *          0x7B='{' ... 0x7F=DEL (identically to ASCII)
514
 *
515
 * @param[in] c   Character to map to the custom encoding.
516
 *
517
 * @return    The customly encoded character.
518
 */
519
static inline char _mapAscii2Custom(const char c)
520
{
521
  if (c >= 'A' && c <= 'Z') {
522
    return ((c - 'A') * 2) + 'A' + 1;
523
  } else if (c > 'Z' && c < 'a') {
524
    return c + ('z' - 'a') + 1;
525
  } else if (c >= 'a' && c <= 'z') {
526
    return ((c - 'a') * 2) + 'A';
527
  } else {
528
    return c;
529
  }
530
}
531
532
/**
533
 * @brief   Compares two strings wrt letter case.
534
 * @details Comparisson uses a custom character encoding or mapping.
535
 *          See @p _mapAscii2Custom for details.
536
 *
537
 * @param[in] str1    First string to compare.
538
 * @param[in] str2    Second string to compare.
539
 * @param[in] cs      Flag indicating whether comparison shall be case sensitive.
540
 * @param[in,out] n   Maximum number of character to compare (in) and number of matching characters (out).
541
 *                    If a null pointer is specified, this parameter is ignored.
542
 *                    If the value pointed to is zero, comarison will not be limited.
543
 * @param[out] m      Optional indicator whether there was at least one case mismatch.
544
 *
545
 * @return      Integer value indicating the relationship between the strings.
546
 * @retval <0   The first character that does not match has a lower value in str1 than in str2.
547
 * @retval  0   The contents of both strings are equal.
548
 * @retval >0   The first character that does not match has a greater value in str1 than in str2.
549
 */
550
static int _strccmp(const char *str1, const char *str2, bool cs, size_t* n, charmatch_t* m)
551
{
552
  aosDbgCheck(str1 != NULL);
553
  aosDbgCheck(str2 != NULL);
554
555
  // initialize variables
556
  if (m) {
557
    *m = CHAR_MATCH_NOT;
558
  }
559
  size_t i = 0;
560
561
  // iterate through the strings
562
  while ((n == NULL) || (*n == 0) || (*n > 0 && i < *n)) {
563
    // break on NUL
564
    if (str1[i] == '\0' || str2[i] == '\0') {
565
      if (n) {
566
        *n = i;
567
      }
568
      break;
569
    }
570
    // compare character
571
    const charmatch_t match = _charcmp(str1[i], str2[i]);
572
    if ((match == CHAR_MATCH_CASE) || (!cs && match == CHAR_MATCH_NCASE)) {
573
      if (m != NULL && *m != CHAR_MATCH_NCASE) {
574
        *m = match;
575
      }
576
      ++i;
577
    } else {
578
      if (n) {
579
        *n = i;
580
      }
581
      break;
582
    }
583
  }
584
585
  return _mapAscii2Custom(str1[i]) - _mapAscii2Custom(str2[i]);
586
}
587
588 ba516b61 Thomas Schöpping
static aos_status_t _readChannel(aos_shell_t* shell, AosShellChannel* channel, size_t* n)
589 e545e620 Thomas Schöpping
{
590
  aosDbgCheck(shell != NULL);
591 ba516b61 Thomas Schöpping
  aosDbgCheck(channel != NULL);
592
  aosDbgCheck(n != NULL);
593 e545e620 Thomas Schöpping
594
  // local variables
595 ba516b61 Thomas Schöpping
  aos_shellaction_t action = AOS_SHELL_ACTION_NONE;
596 e545e620 Thomas Schöpping
  char c;
597 dd8738ea Thomas Schöpping
  special_key_t key;
598 e545e620 Thomas Schöpping
599 ba516b61 Thomas Schöpping
  // initialize output variables
600
  *n = 0;
601
602
  // read character by character from the channel
603
  while (chnReadTimeout(channel, (uint8_t*)&c, 1, TIME_IMMEDIATE)) {
604 dd8738ea Thomas Schöpping
    key = KEY_UNKNOWN;
605 e545e620 Thomas Schöpping
606
    // parse escape sequence
607 ba516b61 Thomas Schöpping
    if (shell->inputdata.escp > 0) {
608
      shell->inputdata.escseq[shell->inputdata.escp] = c;
609
      ++shell->inputdata.escp;
610
      key = _interpreteEscapeSequence(shell->inputdata.escseq);
611 e545e620 Thomas Schöpping
      if (key == KEY_AMBIGUOUS) {
612
        // read next byte to resolve ambiguity
613
        continue;
614
      } else {
615 ba516b61 Thomas Schöpping
        /*
616
         * If the escape sequence could either be parsed sucessfully
617
         * or there is no match (KEY_UNKNOWN),
618
         * reset the sequence variable and interprete key/character
619
         */
620
        shell->inputdata.escp = 0;
621
        memset(shell->inputdata.escseq, '\0', sizeof(shell->inputdata.escseq)*sizeof(shell->inputdata.escseq[0]));
622 e545e620 Thomas Schöpping
      }
623
    }
624
625 ba516b61 Thomas Schöpping
    /* interprete keys or character */
626 e545e620 Thomas Schöpping
    {
627 ba516b61 Thomas Schöpping
      // default
628
      action = AOS_SHELL_ACTION_NONE;
629
630
      // printable character
631
      if (key == KEY_UNKNOWN && c >= '\x20' && c <= '\x7E') {
632
        action = AOS_SHELL_ACTION_READCHAR;
633
      }
634
635
      // tab key or character
636
      else if (key == KEY_TAB || c == '\x09') {
637
        /*
638
         * pressing tab once applies auto fill
639
         * pressing tab a second time prints suggestions
640
         */
641
        if (shell->inputdata.lastaction == AOS_SHELL_ACTION_AUTOFILL || shell->inputdata.lastaction == AOS_SHELL_ACTION_SUGGEST) {
642
          action = AOS_SHELL_ACTION_SUGGEST;
643 e545e620 Thomas Schöpping
        } else {
644 ba516b61 Thomas Schöpping
          action = AOS_SHELL_ACTION_AUTOFILL;
645 e545e620 Thomas Schöpping
        }
646 ba516b61 Thomas Schöpping
      }
647
648
      // INS key
649
      else if (key == KEY_INSERT) {
650
        action = AOS_SHELL_ACTION_INSERTTOGGLE;
651
      }
652
653
      // DEL key or character
654
      else if (key == KEY_DELETE || c == '\x7F') {
655
        // ignore if cursor is at very right
656
        if (shell->inputdata.cursorpos < shell->inputdata.lineend) {
657
          action = AOS_SHELL_ACTION_DELETEFORWARD;
658 e545e620 Thomas Schöpping
        }
659 ba516b61 Thomas Schöpping
      }
660
661
      // backspace key or character
662
      else if (key == KEY_BACKSPACE || c == '\x08') {
663
        // ignore if cursor is at very left
664
        if (shell->inputdata.cursorpos > 0) {
665
          action = AOS_SHELL_ACTION_DELETEBACKWARD;
666 e545e620 Thomas Schöpping
        }
667 ba516b61 Thomas Schöpping
      }
668
669
      // 'page up' of 'arrow up' key
670
      else if (key == KEY_PAGE_UP || key == KEY_ARROW_UP) {
671 e545e620 Thomas Schöpping
        // ignore if there was some input
672 ba516b61 Thomas Schöpping
        if (shell->inputdata.noinput) {
673
          action = AOS_SHELL_ACTION_RECALLLAST;
674 e545e620 Thomas Schöpping
        }
675 ba516b61 Thomas Schöpping
      }
676
677
      // 'page down' key, 'arrow done' key, 'end of test' character or 'end of transmission' character
678
      else if (key == KEY_PAGE_DOWN || key == KEY_ARROW_DOWN || c == '\x03' || c == '\x03') {
679 e545e620 Thomas Schöpping
        // ignore if line is empty
680 ba516b61 Thomas Schöpping
        if (shell->inputdata.lineend > 0) {
681
          action = AOS_SHELL_ACTION_CLEAR;
682 e545e620 Thomas Schöpping
        }
683 ba516b61 Thomas Schöpping
      }
684
685
      // 'home' key
686
      else if (key == KEY_HOME) {
687 e545e620 Thomas Schöpping
        // ignore if cursor is very left
688 ba516b61 Thomas Schöpping
        if (shell->inputdata.cursorpos > 0) {
689
          action = AOS_SHELL_ACTION_CURSOR2START;
690 e545e620 Thomas Schöpping
        }
691 ba516b61 Thomas Schöpping
      }
692
693
      // 'end' key
694
      else if (key == KEY_END) {
695
        // ignore if cursos is very right
696
        if (shell->inputdata.cursorpos < shell->inputdata.lineend) {
697
          action = AOS_SHELL_ACTION_CURSOR2END;
698 e545e620 Thomas Schöpping
        }
699 ba516b61 Thomas Schöpping
      }
700
701
      // 'arrow left' key
702
      else if (key == KEY_ARROW_LEFT) {
703 e545e620 Thomas Schöpping
        // ignore if cursor is very left
704 ba516b61 Thomas Schöpping
        if (shell->inputdata.cursorpos > 0) {
705
          action = AOS_SHELL_ACTION_CURSORLEFT;
706 e545e620 Thomas Schöpping
        }
707 ba516b61 Thomas Schöpping
      }
708
709
      // 'arrow right' key
710
      else if (key == KEY_ARROW_RIGHT) {
711
        // irgnore if cursor is very right
712
        if (shell->inputdata.cursorpos < shell->inputdata.lineend) {
713
          action = AOS_SHELL_ACTION_CURSORRIGHT;
714 e545e620 Thomas Schöpping
        }
715 ba516b61 Thomas Schöpping
      }
716
717
      // carriage return ('\r') or line feed ('\n') character
718
      else if (c == '\x0D' || c == '\x0A') {
719
        action = AOS_SHELL_ACTION_EXECUTE;
720
      }
721
722
      // ESC key or [ESCAPE] character
723
      else if (key == KEY_ESCAPE || c == '\x1B') {
724
        action = AOS_SHELL_ACTION_ESCSTART;
725 e545e620 Thomas Schöpping
      }
726
    }
727
728
    /* handle function */
729 ba516b61 Thomas Schöpping
    switch (action) {
730
      case AOS_SHELL_ACTION_READCHAR:
731
      {
732 e545e620 Thomas Schöpping
        // line is full
733 ba516b61 Thomas Schöpping
        if (shell->inputdata.lineend + 1 >= shell->linesize) {
734
          _moveCursor(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
735
          chprintf((BaseSequentialStream*)&shell->stream, "\n\tmaximum line width reached\n");
736 e545e620 Thomas Schöpping
          _printPrompt(shell);
737 ba516b61 Thomas Schöpping
          _printLine(shell, 0, shell->inputdata.lineend);
738
          _moveCursor(shell, shell->inputdata.lineend, shell->inputdata.cursorpos);
739 e545e620 Thomas Schöpping
        }
740
        // read character
741
        else {
742
          // clear old line content on first input
743 ba516b61 Thomas Schöpping
          if (shell->inputdata.noinput) {
744 e545e620 Thomas Schöpping
            memset(shell->line, '\0', shell->linesize);
745 ba516b61 Thomas Schöpping
            shell->inputdata.noinput = false;
746 e545e620 Thomas Schöpping
          }
747
          // overwrite content
748
          if (shell->config & AOS_SHELL_CONFIG_INPUT_OVERWRITE) {
749 ba516b61 Thomas Schöpping
            shell->line[shell->inputdata.cursorpos] = c;
750
            ++shell->inputdata.cursorpos;
751
            shell->inputdata.lineend = (shell->inputdata.cursorpos > shell->inputdata.lineend) ? shell->inputdata.cursorpos : shell->inputdata.lineend;
752
            streamPut(&shell->stream, (uint8_t)c);
753 e545e620 Thomas Schöpping
          }
754
          // insert character
755
          else {
756 ba516b61 Thomas Schöpping
            memmove(&(shell->line[shell->inputdata.cursorpos+1]), &(shell->line[shell->inputdata.cursorpos]), shell->inputdata.lineend - shell->inputdata.cursorpos);
757
            shell->line[shell->inputdata.cursorpos] = c;
758
            ++shell->inputdata.lineend;
759
            _printLine(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
760
            ++shell->inputdata.cursorpos;
761
            _moveCursor(shell, shell->inputdata.lineend, shell->inputdata.cursorpos);
762 e545e620 Thomas Schöpping
          }
763
        }
764
        break;
765 ba516b61 Thomas Schöpping
      }
766 e545e620 Thomas Schöpping
767 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_AUTOFILL:
768 e545e620 Thomas Schöpping
      {
769
        const char* fill = shell->line;
770 ba516b61 Thomas Schöpping
        size_t cmatch = shell->inputdata.cursorpos;
771 e545e620 Thomas Schöpping
        charmatch_t matchlevel = CHAR_MATCH_NOT;
772
        size_t n;
773
        // iterate through command list
774
        for (aos_shellcommand_t* cmd = shell->commands; cmd != NULL; cmd = cmd->next) {
775
          // compare current match with command
776
          n = cmatch;
777
          charmatch_t mlvl = CHAR_MATCH_NOT;
778
          _strccmp(fill, cmd->name, shell->config & AOS_SHELL_CONFIG_MATCH_CASE, (n == 0) ? NULL : &n, &mlvl);
779
          const int cmp = (n < cmatch) ?
780
                            (n - cmatch) :
781
                            (cmd->name[n] != '\0') ?
782
                              strlen(cmd->name) - n :
783
                              0;
784
          // if an exact match was found
785 ba516b61 Thomas Schöpping
          if (cmatch + cmp == shell->inputdata.cursorpos) {
786
            cmatch = shell->inputdata.cursorpos;
787 e545e620 Thomas Schöpping
            fill = cmd->name;
788
            // break the loop only if there are no case mismatches with the input
789 ba516b61 Thomas Schöpping
            n = shell->inputdata.cursorpos;
790 e545e620 Thomas Schöpping
            _strccmp(fill, shell->line, false, &n, &mlvl);
791
            if (mlvl == CHAR_MATCH_CASE) {
792
              break;
793
            }
794
          }
795
          // if a not exact match was found
796 ba516b61 Thomas Schöpping
          else if (cmatch + cmp > shell->inputdata.cursorpos) {
797 e545e620 Thomas Schöpping
            // if this is the first one
798
            if (fill == shell->line) {
799
              cmatch += cmp;
800
              fill = cmd->name;
801
            }
802
            // if this is a worse one
803
            else if ((cmp < 0) || (cmp == 0 && mlvl == CHAR_MATCH_CASE)) {
804
              cmatch += cmp;
805
            }
806
          }
807
          // non matching commands are ignored
808
          else {}
809
        }
810
        // evaluate if there are case mismatches
811
        n = cmatch;
812
        _strccmp(shell->line, fill, shell->config & AOS_SHELL_CONFIG_MATCH_CASE, &n, &matchlevel);
813
        // print the auto fill if any
814 ba516b61 Thomas Schöpping
        if (cmatch > shell->inputdata.cursorpos || (cmatch == shell->inputdata.cursorpos && matchlevel == CHAR_MATCH_NCASE)) {
815
          shell->inputdata.noinput = false;
816 e545e620 Thomas Schöpping
          // limit auto fill so it will not overflow the line width
817 ba516b61 Thomas Schöpping
          if (shell->inputdata.lineend + (cmatch - shell->inputdata.cursorpos) > shell->linesize) {
818
            cmatch = shell->linesize - shell->inputdata.lineend + shell->inputdata.cursorpos;
819 e545e620 Thomas Schöpping
          }
820
          // move trailing memory further in the line
821 ba516b61 Thomas Schöpping
          memmove(&(shell->line[cmatch]), &(shell->line[shell->inputdata.cursorpos]), shell->inputdata.lineend - shell->inputdata.cursorpos);
822
          shell->inputdata.lineend += cmatch - shell->inputdata.cursorpos;
823 e545e620 Thomas Schöpping
          // if there was no incorrect case when matching
824
          if (matchlevel == CHAR_MATCH_CASE) {
825
            // insert fill command name to line
826 ba516b61 Thomas Schöpping
            memcpy(&(shell->line[shell->inputdata.cursorpos]), &(fill[shell->inputdata.cursorpos]), cmatch - shell->inputdata.cursorpos);
827 e545e620 Thomas Schöpping
            // print the output
828 ba516b61 Thomas Schöpping
            _printLine(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
829 e545e620 Thomas Schöpping
          } else {
830
            // overwrite line with fill command name
831
            memcpy(shell->line, fill, cmatch);
832
            // reprint the whole line
833 ba516b61 Thomas Schöpping
            _moveCursor(shell, shell->inputdata.cursorpos, 0);
834
            _printLine(shell, 0, shell->inputdata.lineend);
835 e545e620 Thomas Schöpping
          }
836
          // move cursor to the end of the matching sequence
837 ba516b61 Thomas Schöpping
          shell->inputdata.cursorpos = cmatch;
838
          _moveCursor(shell, shell->inputdata.lineend, shell->inputdata.cursorpos);
839 e545e620 Thomas Schöpping
        }
840
        break;
841
      }
842
843 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_SUGGEST:
844 e545e620 Thomas Schöpping
      {
845
        unsigned int matches = 0;
846
        // iterate through command list
847
        for (aos_shellcommand_t* cmd = shell->commands; cmd != NULL; cmd = cmd->next) {
848
          // compare line content with command, excpet if cursorpos=0
849 ba516b61 Thomas Schöpping
          size_t i = shell->inputdata.cursorpos;
850
          if (shell->inputdata.cursorpos > 0) {
851 e545e620 Thomas Schöpping
            _strccmp(shell->line, cmd->name, true, &i, NULL);
852
          }
853 ba516b61 Thomas Schöpping
          const int cmp = (i < shell->inputdata.cursorpos) ?
854
                            (i - shell->inputdata.cursorpos) :
855 e545e620 Thomas Schöpping
                            (cmd->name[i] != '\0') ?
856
                              strlen(cmd->name) - i :
857
                              0;
858
          // if a match was found
859
          if (cmp > 0) {
860
            // if this is the first one
861
            if (matches == 0) {
862 ba516b61 Thomas Schöpping
              _moveCursor(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
863
              streamPut(&shell->stream, '\n');
864 e545e620 Thomas Schöpping
            }
865
            // print the command
866 ba516b61 Thomas Schöpping
            chprintf((BaseSequentialStream*)&shell->stream, "\t%s\n", cmd->name);
867 e545e620 Thomas Schöpping
            ++matches;
868
          }
869
        }
870
        // reprint the prompt and line if any matches have been found
871
        if (matches > 0) {
872
          _printPrompt(shell);
873 ba516b61 Thomas Schöpping
          _printLine(shell, 0, shell->inputdata.lineend);
874
          _moveCursor(shell, shell->inputdata.lineend, shell->inputdata.cursorpos);
875
          shell->inputdata.noinput = false;
876 e545e620 Thomas Schöpping
        }
877
        break;
878
      }
879
880 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_INSERTTOGGLE:
881
      {
882 e545e620 Thomas Schöpping
        if (shell->config & AOS_SHELL_CONFIG_INPUT_OVERWRITE) {
883
          shell->config &= ~AOS_SHELL_CONFIG_INPUT_OVERWRITE;
884
        } else {
885
          shell->config |= AOS_SHELL_CONFIG_INPUT_OVERWRITE;
886
        }
887
        break;
888 ba516b61 Thomas Schöpping
      }
889 e545e620 Thomas Schöpping
890 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_DELETEFORWARD:
891
      {
892
        --shell->inputdata.lineend;
893
        memmove(&(shell->line[shell->inputdata.cursorpos]), &(shell->line[shell->inputdata.cursorpos+1]), shell->inputdata.lineend - shell->inputdata.cursorpos);
894
        _printLine(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
895
        streamPut(&shell->stream, ' ');
896
        _moveCursor(shell, shell->inputdata.lineend + 1, shell->inputdata.cursorpos);
897 e545e620 Thomas Schöpping
        break;
898 ba516b61 Thomas Schöpping
      }
899 e545e620 Thomas Schöpping
900 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_DELETEBACKWARD:
901
      {
902
        --shell->inputdata.cursorpos;
903
        memmove(&(shell->line[shell->inputdata.cursorpos]), &(shell->line[shell->inputdata.cursorpos+1]), shell->inputdata.lineend - shell->inputdata.cursorpos);
904
        --shell->inputdata.lineend;
905
        shell->line[shell->inputdata.lineend] = '\0';
906
        _moveCursor(shell, shell->inputdata.cursorpos + 1, shell->inputdata.cursorpos);
907
        _printLine(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
908
        streamPut(&shell->stream, ' ');
909
        _moveCursor(shell, shell->inputdata.lineend+1, shell->inputdata.cursorpos);
910 e545e620 Thomas Schöpping
        break;
911 ba516b61 Thomas Schöpping
      }
912 e545e620 Thomas Schöpping
913 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_RECALLLAST:
914 e545e620 Thomas Schöpping
      {
915
        // replace any intermediate NUL bytes with spaces
916 ba516b61 Thomas Schöpping
        shell->inputdata.lineend = 0;
917 e545e620 Thomas Schöpping
        size_t nul_start = 0;
918
        size_t nul_end = 0;
919
        // search line for a NUL byte
920
        while (nul_start < shell->linesize) {
921
          if (shell->line[nul_start] == '\0') {
922
            nul_end = nul_start + 1;
923
            // keep searcjing for a byte that is not NUL
924
            while (nul_end < shell->linesize) {
925
              if (shell->line[nul_end] != '\0') {
926
                // an intermediate NUL sequence was found
927
                memset(&(shell->line[nul_start]), ' ', nul_end - nul_start);
928 ba516b61 Thomas Schöpping
                shell->inputdata.lineend = nul_end + 1;
929 e545e620 Thomas Schöpping
                break;
930
              } else {
931
                ++nul_end;
932
              }
933
            }
934
            nul_start = nul_end + 1;
935
          } else {
936 ba516b61 Thomas Schöpping
            ++shell->inputdata.lineend;
937 e545e620 Thomas Schöpping
            ++nul_start;
938
          }
939
        }
940 ba516b61 Thomas Schöpping
        shell->inputdata.cursorpos = shell->inputdata.lineend;
941 e545e620 Thomas Schöpping
        // print the line
942 ba516b61 Thomas Schöpping
        shell->inputdata.noinput = _printLine(shell, 0, shell->inputdata.lineend) == 0;
943 e545e620 Thomas Schöpping
        break;
944
      }
945
946 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_CLEAR:
947
      {
948 e545e620 Thomas Schöpping
        // clear output
949 ba516b61 Thomas Schöpping
        _moveCursor(shell, shell->inputdata.cursorpos, 0);
950
        for (shell->inputdata.cursorpos = 0; shell->inputdata.cursorpos < shell->inputdata.lineend; ++shell->inputdata.cursorpos) {
951
          streamPut(&shell->stream, ' ');
952 e545e620 Thomas Schöpping
        }
953 ba516b61 Thomas Schöpping
        _moveCursor(shell, shell->inputdata.lineend, 0);
954
        shell->inputdata.cursorpos = 0;
955
        shell->inputdata.lineend = 0;
956
        shell->inputdata.noinput = true;
957 e545e620 Thomas Schöpping
        break;
958 ba516b61 Thomas Schöpping
      }
959 e545e620 Thomas Schöpping
960 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_CURSOR2START:
961
      {
962
        _moveCursor(shell, shell->inputdata.cursorpos, 0);
963
        shell->inputdata.cursorpos = 0;
964 e545e620 Thomas Schöpping
        break;
965 ba516b61 Thomas Schöpping
      }
966 e545e620 Thomas Schöpping
967 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_CURSOR2END:
968
      {
969
        _moveCursor(shell, shell->inputdata.cursorpos, shell->inputdata.lineend);
970
        shell->inputdata.cursorpos = shell->inputdata.lineend;
971 e545e620 Thomas Schöpping
        break;
972 ba516b61 Thomas Schöpping
      }
973 e545e620 Thomas Schöpping
974 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_CURSORLEFT:
975
      {
976
        _moveCursor(shell, shell->inputdata.cursorpos, shell->inputdata.cursorpos-1);
977
        --shell->inputdata.cursorpos;
978 e545e620 Thomas Schöpping
        break;
979 ba516b61 Thomas Schöpping
      }
980 e545e620 Thomas Schöpping
981 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_CURSORRIGHT:
982
      {
983
        _moveCursor(shell, shell->inputdata.cursorpos, shell->inputdata.cursorpos+1);
984
        ++shell->inputdata.cursorpos;
985 e545e620 Thomas Schöpping
        break;
986 ba516b61 Thomas Schöpping
      }
987 e545e620 Thomas Schöpping
988 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_EXECUTE:
989
      {
990
        streamPut(&shell->stream, '\n');
991
        // set the number of read bytes and return
992
        if (!shell->inputdata.noinput) {
993
          *n = shell->linesize - shell->inputdata.lineend;
994 e545e620 Thomas Schöpping
          // fill the remainder of the line with NUL bytes
995 ba516b61 Thomas Schöpping
          memset(&(shell->line[shell->inputdata.lineend]), '\0', *n);
996
          // reset static variables
997
          shell->inputdata.noinput = true;
998 e545e620 Thomas Schöpping
        }
999 ba516b61 Thomas Schöpping
        return AOS_SUCCESS;
1000 e545e620 Thomas Schöpping
        break;
1001 ba516b61 Thomas Schöpping
      }
1002 e545e620 Thomas Schöpping
1003 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_ESCSTART:
1004
      {
1005
        shell->inputdata.escseq[0] = c;
1006
        ++shell->inputdata.escp;
1007 e545e620 Thomas Schöpping
        break;
1008 ba516b61 Thomas Schöpping
      }
1009 e545e620 Thomas Schöpping
1010 ba516b61 Thomas Schöpping
      case AOS_SHELL_ACTION_NONE:
1011 e545e620 Thomas Schöpping
      default:
1012 ba516b61 Thomas Schöpping
      {
1013 e545e620 Thomas Schöpping
        // do nothing (ignore input) and read next byte
1014
        continue;
1015
        break;
1016 ba516b61 Thomas Schöpping
      }
1017
    } /* end of switch */
1018 e545e620 Thomas Schöpping
1019 ba516b61 Thomas Schöpping
    shell->inputdata.lastaction = action;
1020 e545e620 Thomas Schöpping
  } /* end of while */
1021
1022 ba516b61 Thomas Schöpping
  // no more data could be read from the channel
1023
  return AOS_WARNING;
1024 e545e620 Thomas Schöpping
}
1025
1026
/**
1027
 * @brief   Parses the content of the input buffer (line) to separate arguments.
1028
 *
1029
 * @param[in] shell   Pointer to the shell object.
1030
 *
1031
 * @return            Number of arguments found.
1032
 */
1033
static size_t _parseArguments(aos_shell_t* shell)
1034
{
1035
  aosDbgCheck(shell != NULL);
1036
1037
  /*
1038
   * States for a very small FSM.
1039
   */
1040
  typedef enum {
1041
    START,
1042
    SPACE,
1043
    TEXT,
1044
    END,
1045
  } state_t;
1046
1047
  // local variables
1048
  state_t state = START;
1049
  size_t arg = 0;
1050
1051
  // iterate through the line
1052
  for (char* c = shell->line; c < shell->line + shell->linesize; ++c) {
1053
    // terminate at first NUL byte
1054
    if (*c == '\0') {
1055
      state = END;
1056
      break;
1057
    }
1058
    // spaces become NUL bytes
1059
    else if (*c == ' ') {
1060
      *c = '\0';
1061
      state = SPACE;
1062
    }
1063
    // handle non-NUL bytes
1064
    else {
1065
      switch (state) {
1066
        case START:
1067
        case SPACE:
1068
          // ignore too many arguments
1069
          if (arg < shell->arglistsize) {
1070
            shell->arglist[arg] = c;
1071
          }
1072
          ++arg;
1073
          break;
1074
        case TEXT:
1075
        case END:
1076
        default:
1077
          break;
1078
      }
1079
      state = TEXT;
1080
    }
1081
  }
1082
1083
  // set all remaining argument pointers to NULL
1084
  for (size_t a = arg; a < shell->arglistsize; ++a) {
1085
    shell->arglist[a] = NULL;
1086
  }
1087
1088
  return arg;
1089
}
1090
1091
/**
1092
 * @brief   Initializes a shell object with the specified parameters.
1093
 *
1094
 * @param[in] shell         Pointer to the shell object.
1095
 * @param[in] stream        I/O stream to use.
1096
 * @param[in] prompt        Prompt line to print (NULL = use default prompt).
1097
 * @param[in] line          Pointer to the input buffer.
1098
 * @param[in] linesize      Size of the input buffer.
1099
 * @param[in] arglist       Pointer to the argument buffer.
1100
 * @param[in] arglistsize   Size of te argument buffer.
1101
 */
1102 ba516b61 Thomas Schöpping
void aosShellInit(aos_shell_t* shell, event_source_t* oseventsource,  const char* prompt, char* line, size_t linesize, char** arglist, size_t arglistsize)
1103 e545e620 Thomas Schöpping
{
1104
  aosDbgCheck(shell != NULL);
1105 ba516b61 Thomas Schöpping
  aosDbgCheck(oseventsource != NULL);
1106 e545e620 Thomas Schöpping
  aosDbgCheck(line != NULL);
1107
  aosDbgCheck(arglist != NULL);
1108
1109
  // set parameters
1110
  shell->thread = NULL;
1111
  chEvtObjectInit(&shell->eventSource);
1112 ba516b61 Thomas Schöpping
  shell->os.eventSource = oseventsource;
1113
  aosShellStreamInit(&shell->stream);
1114 e545e620 Thomas Schöpping
  shell->prompt = prompt;
1115
  shell->commands = NULL;
1116
  shell->execstatus.command = NULL;
1117
  shell->execstatus.retval = 0;
1118
  shell->line = line;
1119
  shell->linesize = linesize;
1120 ba516b61 Thomas Schöpping
  shell->inputdata.lastaction = AOS_SHELL_ACTION_NONE;
1121
  shell->inputdata.escp = 0;
1122
  memset(shell->inputdata.escseq, '\0', sizeof(shell->inputdata.escseq)*sizeof(shell->inputdata.escseq[0]));
1123
  shell->inputdata.cursorpos = 0;
1124
  shell->inputdata.lineend = 0;
1125
  shell->inputdata.noinput = true;
1126 e545e620 Thomas Schöpping
  shell->arglist = arglist;
1127
  shell->arglistsize = arglistsize;
1128
  shell->config = 0x00;
1129
1130
  // initialize arrays
1131
  memset(shell->line, '\0', shell->linesize);
1132
  for (size_t a = 0; a < shell->arglistsize; ++a) {
1133
    shell->arglist[a] = NULL;
1134
  }
1135
1136
  return;
1137
}
1138
1139
/**
1140 ba516b61 Thomas Schöpping
 * @brief   Initialize an AosShellStream object.
1141
 *
1142
 * @param[in] stream  The AosShellStrem to initialize.
1143
 */
1144
void aosShellStreamInit(AosShellStream* stream)
1145
{
1146
  aosDbgCheck(stream != NULL);
1147
1148
  stream->vmt = &_streamvmt;
1149
  stream->channel = NULL;
1150
1151
  return;
1152
}
1153
1154
/**
1155
 * @brief   Initialize an AosShellChannel object with the specified parameters.
1156
 *
1157 dd8738ea Thomas Schöpping
 * @param[in] channel       The AosShellChannel to initialize.
1158
 * @param[in] asyncchannel  An BaseAsynchronousChannel this AosShellChannel is associated with.
1159 ba516b61 Thomas Schöpping
 */
1160 dd8738ea Thomas Schöpping
void aosShellChannelInit(AosShellChannel* channel, BaseAsynchronousChannel* asyncchannel)
1161 ba516b61 Thomas Schöpping
{
1162
  aosDbgCheck(channel != NULL);
1163 dd8738ea Thomas Schöpping
  aosDbgCheck(asyncchannel != NULL);
1164 ba516b61 Thomas Schöpping
1165
  channel->vmt = &_channelvmt;
1166 dd8738ea Thomas Schöpping
  channel->asyncchannel = asyncchannel;
1167
  channel->listener.wflags = 0;
1168 ba516b61 Thomas Schöpping
  channel->next = NULL;
1169
  channel->flags = 0;
1170
1171
  return;
1172
}
1173
1174
/**
1175 e545e620 Thomas Schöpping
 * @brief   Inserts a command to the shells list of commands.
1176
 *
1177
 * @param[in] shell   Pointer to the shell object.
1178
 * @param[in] cmd     Pointer to the command to add.
1179
 *
1180
 * @return            A status value.
1181
 * @retval AOS_SUCCESS  The command was added successfully.
1182
 * @retval AOS_ERROR    Another command with identical name already exists.
1183
 */
1184
aos_status_t aosShellAddCommand(aos_shell_t *shell, aos_shellcommand_t *cmd)
1185
{
1186
  aosDbgCheck(shell != NULL);
1187
  aosDbgCheck(cmd != NULL);
1188
  aosDbgCheck(cmd->name != NULL && strlen(cmd->name) > 0 && strchr(cmd->name, ' ') == NULL && strchr(cmd->name, '\t') == NULL);
1189
  aosDbgCheck(cmd->callback != NULL);
1190
  aosDbgCheck(cmd->next == NULL);
1191
1192
  aos_shellcommand_t* prev = NULL;
1193
  aos_shellcommand_t** curr = &(shell->commands);
1194
1195
  // insert the command to the list wrt lexographical order (exception: lower case characters preceed upper their uppercase counterparts)
1196 ba516b61 Thomas Schöpping
  while (*curr != NULL) {
1197
    // iterate through the list as long as the command names are 'smaller'
1198
    const int cmp = _strccmp((*curr)->name, cmd->name, true, NULL, NULL);
1199
    if (cmp < 0) {
1200
      prev = *curr;
1201
      curr = &((*curr)->next);
1202
      continue;
1203
    }
1204
    // error if the command already exists
1205
    else if (cmp == 0) {
1206
      return AOS_ERROR;
1207
    }
1208
    // insert the command as soon as a 'larger' name was found
1209
    else /* if (cmpval > 0) */ {
1210
      cmd->next = *curr;
1211
      // special case: the first command is larger
1212
      if (prev == NULL) {
1213
        shell->commands = cmd;
1214
      } else {
1215
        prev->next = cmd;
1216 e545e620 Thomas Schöpping
      }
1217 ba516b61 Thomas Schöpping
      return AOS_SUCCESS;
1218 e545e620 Thomas Schöpping
    }
1219
  }
1220 ba516b61 Thomas Schöpping
  // the end of the list has been reached
1221
1222
  // append the command
1223
  *curr = cmd;
1224
  return AOS_SUCCESS;
1225 e545e620 Thomas Schöpping
}
1226
1227
/**
1228
 * @brief   Removes a command from the shells list of commands.
1229
 *
1230
 * @param[in] shell     Pointer to the shell object.
1231
 * @param[in] cmd       Name of the command to removde.
1232
 * @param[out] removed  Optional pointer to the command that was removed.
1233
 *
1234
 * @return              A status value.
1235
 * @retval AOS_SUCCESS  The command was removed successfully.
1236
 * @retval AOS_ERROR    The command name was not found.
1237
 */
1238
aos_status_t aosShellRemoveCommand(aos_shell_t *shell, char *cmd, aos_shellcommand_t **removed)
1239
{
1240
  aosDbgCheck(shell != NULL);
1241
  aosDbgCheck(cmd != NULL && strlen(cmd) > 0);
1242
1243
  aos_shellcommand_t* prev = NULL;
1244
  aos_shellcommand_t** curr = &(shell->commands);
1245
1246
  // iterate through the list and seach for the specified command name
1247
  while (curr != NULL) {
1248
    const int cmpval = strcmp((*curr)->name, cmd);
1249
    // iterate through the list as long as the command names are 'smaller'
1250
    if (cmpval < 0) {
1251
      prev = *curr;
1252
      curr = &((*curr)->next);
1253
      continue;
1254
    }
1255
    // remove the command when found
1256
    else if (cmpval == 0) {
1257
      // special case: the first command matches
1258
      if (prev == NULL) {
1259
        shell->commands = (*curr)->next;
1260
      } else {
1261
        prev->next = (*curr)->next;
1262
      }
1263
      (*curr)->next = NULL;
1264
      // set the optional output argument
1265
      if (removed != NULL) {
1266
        *removed = *curr;
1267
      }
1268
      return AOS_SUCCESS;
1269
    }
1270
    // break the loop if the command names are 'larger'
1271
    else /* if (cmpval > 0) */ {
1272
      break;
1273
    }
1274
  }
1275
1276
  // if the command was not found, return an error
1277
  return AOS_ERROR;
1278
}
1279
1280
/**
1281 ba516b61 Thomas Schöpping
 * @brief   Add a channel to a AosShellStream.
1282
 *
1283
 * @param[in] stream    The AosShellStream to extend.
1284
 * @param[in] channel   The channel to be added to the stream.
1285
 */
1286
void aosShellStreamAddChannel(AosShellStream* stream, AosShellChannel* channel)
1287
{
1288
  aosDbgCheck(stream != NULL);
1289 dd8738ea Thomas Schöpping
  aosDbgCheck(channel != NULL && channel->asyncchannel != NULL && channel->next == NULL && (channel->flags & AOS_SHELLCHANNEL_ATTACHED) == 0);
1290 ba516b61 Thomas Schöpping
1291
  // prepend the new channel
1292
  chSysLock();
1293
  channel->flags |= AOS_SHELLCHANNEL_ATTACHED;
1294
  channel->next = stream->channel;
1295
  stream->channel = channel;
1296
  chSysUnlock();
1297
1298
  return;
1299
}
1300
1301
/**
1302
 * @brief   Remove a channel from an AosShellStream.
1303
 *
1304
 * @param[in] stream    The AosShellStream to modify.
1305
 * @param[in] channel   The channel to remove.
1306
 * @return
1307
 */
1308
aos_status_t aosShellStreamRemoveChannel(AosShellStream* stream, AosShellChannel* channel)
1309
{
1310
  aosDbgCheck(stream != NULL);
1311 dd8738ea Thomas Schöpping
  aosDbgCheck(channel != NULL && channel->asyncchannel != NULL && channel->flags & AOS_SHELLCHANNEL_ATTACHED);
1312 ba516b61 Thomas Schöpping
1313
  // local varibales
1314
  AosShellChannel* prev = NULL;
1315
  AosShellChannel* curr = stream->channel;
1316
1317
  // iterate through the list and search for the specified channel
1318
  while (curr != NULL) {
1319
    // if the channel was found
1320
    if (curr == channel) {
1321
      chSysLock();
1322
      // special case: the first channel matches (prev is NULL)
1323
      if (prev == NULL) {
1324
        stream->channel = curr->next;
1325
      } else {
1326
        prev->next = channel->next;
1327
      }
1328
      curr->next = NULL;
1329
      curr->flags &= ~AOS_SHELLCHANNEL_ATTACHED;
1330
      chSysUnlock();
1331
      return AOS_SUCCESS;
1332
    }
1333
  }
1334
1335
  // if the channel was not found, return an error
1336
  return AOS_ERROR;
1337
}
1338
1339
/**
1340
 * @brief   Enable a AosSheööChannel as input.
1341
 *
1342
 * @param[in] channel   The channel to enable as input.
1343
 */
1344
void aosShellChannelInputEnable(AosShellChannel* channel)
1345
{
1346 dd8738ea Thomas Schöpping
  aosDbgCheck(channel != NULL && channel->asyncchannel != NULL);
1347 ba516b61 Thomas Schöpping
1348
  chSysLock();
1349
  channel->listener.wflags |= CHN_INPUT_AVAILABLE;
1350
  channel->flags |= AOS_SHELLCHANNEL_INPUT_ENABLED;
1351
  chSysUnlock();
1352
1353
  return;
1354
}
1355
1356
/**
1357
 * @brief   Disable a AosSheööChannel as input.
1358
 *
1359
 * @param[in] channel   The channel to disable as input.
1360
 */
1361
void aosShellChannelInputDisable( AosShellChannel* channel)
1362
{
1363 dd8738ea Thomas Schöpping
  aosDbgCheck(channel != NULL && channel->asyncchannel != NULL);
1364 ba516b61 Thomas Schöpping
1365
  chSysLock();
1366
  channel->listener.wflags &= ~CHN_INPUT_AVAILABLE;
1367
  channel->flags &= ~AOS_SHELLCHANNEL_INPUT_ENABLED;
1368
  chSysUnlock();
1369
1370
  return;
1371
}
1372
1373
/**
1374
 * @brief   Enable a AosSheööChannel as output.
1375
 *
1376
 * @param[in] channel   The channel to enable as output.
1377
 */
1378
void aosShellChannelOutputEnable(AosShellChannel* channel)
1379
{
1380 dd8738ea Thomas Schöpping
  aosDbgCheck(channel != NULL && channel->asyncchannel != NULL);
1381 ba516b61 Thomas Schöpping
1382
  channel->flags |= AOS_SHELLCHANNEL_OUTPUT_ENABLED;
1383
1384
  return;
1385
}
1386
1387
/**
1388
 * @brief   Disable a AosSheööChannel as output.
1389
 *
1390
 * @param[in] channel   The channel to disable as output.
1391
 */
1392
void aosShellChannelOutputDisable(AosShellChannel* channel)
1393
{
1394 dd8738ea Thomas Schöpping
  aosDbgCheck(channel != NULL && channel->asyncchannel != NULL);
1395 ba516b61 Thomas Schöpping
1396
  channel->flags &= ~AOS_SHELLCHANNEL_OUTPUT_ENABLED;
1397
1398
  return;
1399
}
1400
1401
/**
1402 e545e620 Thomas Schöpping
 * @brief   Thread main function.
1403
 *
1404
 * @param[in] aosShellThread    Name of the function;
1405
 * @param[in] shell             Pointer to the shell object.
1406
 */
1407 af4fd4a2 Thomas Schöpping
void aosShellThread(void* shell)
1408 e545e620 Thomas Schöpping
{
1409
  aosDbgCheck(shell != NULL);
1410
1411
  // local variables
1412 ba516b61 Thomas Schöpping
  eventmask_t eventmask;
1413
  eventflags_t eventflags;
1414
  AosShellChannel* channel;
1415
  aos_status_t readeval;
1416
  size_t nchars = 0;
1417 e545e620 Thomas Schöpping
  size_t nargs = 0;
1418 ba516b61 Thomas Schöpping
  aos_shellcommand_t* cmd;
1419
1420
1421
  // register OS related events
1422
  chEvtRegisterMask(((aos_shell_t*)shell)->os.eventSource, &(((aos_shell_t*)shell)->os.eventListener), AOS_SHELL_EVENTMASK_OS);
1423
  // register events to all input channels
1424
  for (channel = ((aos_shell_t*)shell)->stream.channel; channel != NULL; channel = channel->next) {
1425 dd8738ea Thomas Schöpping
    chEvtRegisterMaskWithFlags(&(channel->asyncchannel->event), &(channel->listener), AOS_SHELL_EVENTMASK_INPUT, channel->listener.wflags);
1426 ba516b61 Thomas Schöpping
  }
1427 e545e620 Thomas Schöpping
1428
  // fire start event
1429
  chEvtBroadcastFlags(&(((aos_shell_t*)shell)->eventSource), AOS_SHELL_EVTFLAG_START);
1430
1431 ba516b61 Thomas Schöpping
  // print the prompt for the first time
1432
  _printPrompt((aos_shell_t*)shell);
1433
1434 e545e620 Thomas Schöpping
  // enter thread loop
1435
  while (!chThdShouldTerminateX()) {
1436 ba516b61 Thomas Schöpping
    // wait for event and handle it accordingly
1437
    eventmask = chEvtWaitOne(ALL_EVENTS);
1438
1439
    // handle event
1440
    switch (eventmask) {
1441
1442
      // OS related events
1443
      case AOS_SHELL_EVENTMASK_OS:
1444
      {
1445
        eventflags = chEvtGetAndClearFlags(&((aos_shell_t*)shell)->os.eventListener);
1446
        // handle shutdown/restart events
1447
        if (eventflags & AOS_SYSTEM_EVENTFLAGS_SHUTDOWN) {
1448
          chThdTerminate(((aos_shell_t*)shell)->thread);
1449
        } else {
1450
          // print an error message
1451
          chprintf((BaseSequentialStream*)&((aos_shell_t*)shell)->stream, "\nERROR: unknown OS event received (0x%08X)\n", eventflags);
1452
        }
1453 e545e620 Thomas Schöpping
        break;
1454
      }
1455
1456 ba516b61 Thomas Schöpping
      // input events
1457
      case AOS_SHELL_EVENTMASK_INPUT:
1458
      {
1459
        // check and handle all channels
1460
        channel = ((aos_shell_t*)shell)->stream.channel;
1461
        while (channel != NULL) {
1462
          eventflags = chEvtGetAndClearFlags(&channel->listener);
1463
          // if there is new input
1464
          if (eventflags & CHN_INPUT_AVAILABLE) {
1465 dd8738ea Thomas Schöpping
            // read input from channel
1466
            readeval = _readChannel((aos_shell_t*)shell, channel, &nchars);
1467
            // parse input line to argument list only if the input shall be executed
1468
            nargs = (readeval == AOS_SUCCESS && nchars > 0) ? _parseArguments((aos_shell_t*)shell) : 0;
1469
            // check number of arguments
1470
            if (nargs > ((aos_shell_t*)shell)->arglistsize) {
1471
              // error too many arguments
1472
              chprintf((BaseSequentialStream*)&((aos_shell_t*)shell)->stream, "\ttoo many arguments\n");
1473
            } else if (nargs > 0) {
1474
              // search command list for arg[0] and execute callback
1475
              cmd = ((aos_shell_t*)shell)->commands;
1476
              while (cmd != NULL) {
1477
                if (strcmp(((aos_shell_t*)shell)->arglist[0], cmd->name) == 0) {
1478
                  ((aos_shell_t*)shell)->execstatus.command = cmd;
1479
                  chEvtBroadcastFlags(&(((aos_shell_t*)shell)->eventSource), AOS_SHELL_EVTFLAG_EXEC);
1480
                  ((aos_shell_t*)shell)->execstatus.retval = cmd->callback((BaseSequentialStream*)&((aos_shell_t*)shell)->stream, nargs, ((aos_shell_t*)shell)->arglist);
1481
                  chEvtBroadcastFlags(&(((aos_shell_t*)shell)->eventSource), AOS_SHELL_EVTFLAG_DONE);
1482
                  // notify if the command was not successful
1483
                  if (((aos_shell_t*)shell)->execstatus.retval != 0) {
1484
                    chprintf((BaseSequentialStream*)&((aos_shell_t*)shell)->stream, "command returned exit status %d\n", ((aos_shell_t*)shell)->execstatus.retval);
1485 ba516b61 Thomas Schöpping
                  }
1486 dd8738ea Thomas Schöpping
                  break;
1487 ba516b61 Thomas Schöpping
                }
1488 dd8738ea Thomas Schöpping
                cmd = cmd->next;
1489
              } /* end of while */
1490 e545e620 Thomas Schöpping
1491 dd8738ea Thomas Schöpping
              // if no matching command was found, print an error
1492
              if (cmd == NULL) {
1493
                chprintf((BaseSequentialStream*)&((aos_shell_t*)shell)->stream, "%s: command not found\n", ((aos_shell_t*)shell)->arglist[0]);
1494 ba516b61 Thomas Schöpping
              }
1495
            }
1496 dd8738ea Thomas Schöpping
1497
            // reset some internal variables and eprint a new prompt
1498
            if (readeval == AOS_SUCCESS && !chThdShouldTerminateX()) {
1499
              ((aos_shell_t*)shell)->inputdata.cursorpos = 0;
1500
              ((aos_shell_t*)shell)->inputdata.lineend = 0;
1501
              _printPrompt((aos_shell_t*)shell);
1502 ba516b61 Thomas Schöpping
            }
1503 e545e620 Thomas Schöpping
          }
1504 ba516b61 Thomas Schöpping
1505
          // iterate to next channel
1506
          channel = channel->next;
1507 e545e620 Thomas Schöpping
        }
1508 ba516b61 Thomas Schöpping
        break;
1509 e545e620 Thomas Schöpping
      }
1510 ba516b61 Thomas Schöpping
1511
      // other events
1512
      default:
1513
      {
1514
        // print an error message
1515 1e5f7648 Thomas Schöpping
        chprintf((BaseSequentialStream*)&((aos_shell_t*)shell)->stream, "\nSHELL: ERROR: unknown event received (0x%08X)\n", eventmask);
1516 ba516b61 Thomas Schöpping
        break;
1517 e545e620 Thomas Schöpping
      }
1518
1519 ba516b61 Thomas Schöpping
    } /* end of switch */
1520
1521
  } /* end of while */
1522 e545e620 Thomas Schöpping
1523
  // fire event and exit the thread
1524
  chSysLock();
1525
  chEvtBroadcastFlagsI(&(((aos_shell_t*)shell)->eventSource), AOS_SHELL_EVTFLAG_EXIT);
1526
  chThdExitS(MSG_OK);
1527
  // no chSysUnlock() required since the thread has been terminated an all waiting threads have been woken up
1528
}
1529 ba516b61 Thomas Schöpping
1530
#endif /* AMIROOS_CFG_SHELL_ENABLE == true */
1531 53710ca3 Marc Rothmann
1532
/** @} */