Mistake on this page?
Report an issue in GitHub or email us
ns_cmdline.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2016 ARM Limited. All rights reserved.
3  * SPDX-License-Identifier: Apache-2.0
4  * Licensed under the Apache License, Version 2.0 (the License); you may
5  * not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an AS IS BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 /**
18  * \file ns_cmdline.h
19  *
20  * Command line library - mbedOS shell
21  *
22  * Usage example:
23  *
24  * \code
25  * //simple print function
26  * void myprint(const char* fmt, va_list ap){ vprintf(fmt, ap); }
27  * // simple ready cb, which call next command to be execute
28  * void cmd_ready_cb(int retcode) { cmd_next( retcode ); }
29  *
30  * // dummy command with some option
31  * int cmd_dummy(int argc, char *argv[]){
32  * if( cmd_has_option(argc, argv, "o") ) {
33  * cmd_printf("This is o option");
34  * } else {
35  * return CMDLINE_RETCODE_INVALID_PARAMETERS;
36  * }
37  * return CMDLINE_RETCODE_SUCCESS;
38  *}
39  * // timer cb ( pseudo-timer-code )
40  * void timer_ready_cb(void) {
41  * cmd_ready(CMDLINE_RETCODE_SUCCESS);
42  * }
43  * // long command, which need e.g. some events to finalize command execution
44  * int cmd_long(int argc, char *argv[] ) {
45  timer_start( 5000, timer_ready_cb );
46  * return CMDLINE_RETCODE_EXCUTING_CONTINUE;
47  * }
48  * void main(void) {
49  * cmd_init( &myprint ); // initialize cmdline with print function
50  * cmd_set_ready_cb( cmd_ready_cb ); // configure ready cb
51  * cmd_add("dummy", cmd_dummy, 0, 0); // add one dummy command
52  * cmd_add("long", cmd_long, 0, 0); // add one dummy command
53  * //execute dummy and long commands
54  * cmd_exe( "dymmy;long" );
55  * }
56  * \endcode
57  */
58 #ifndef _CMDLINE_H_
59 #define _CMDLINE_H_
60 
61 #ifdef __cplusplus
62 extern "C" {
63 #endif
64 
65 #include <stdarg.h>
66 #include <stdint.h>
67 #include <stddef.h>
68 #include <stdbool.h>
69 
70 #define CMDLINE_RETCODE_COMMAND_BUSY 2 //!< Command Busy
71 #define CMDLINE_RETCODE_EXCUTING_CONTINUE 1 //!< Execution continue in background
72 #define CMDLINE_RETCODE_SUCCESS 0 //!< Execution Success
73 #define CMDLINE_RETCODE_FAIL -1 //!< Execution Fail
74 #define CMDLINE_RETCODE_INVALID_PARAMETERS -2 //!< Command parameters was incorrect
75 #define CMDLINE_RETCODE_COMMAND_NOT_IMPLEMENTED -3 //!< Command not implemented
76 #define CMDLINE_RETCODE_COMMAND_CB_MISSING -4 //!< Command callback function missing
77 #define CMDLINE_RETCODE_COMMAND_NOT_FOUND -5 //!< Command not found
78 
79 /**
80  * typedef for print functions
81  */
82 typedef void (cmd_print_t)(const char *, va_list);
83 /**
84  * Initialize cmdline class.
85  * This is command line editor without any commands. Application
86  * needs to add commands that should be enabled.
87  * usage e.g.
88  * \code
89  cmd_init( &default_cmd_response_out );
90  * \endcode
91  * \param outf console printing function (like vprintf)
92  */
93 void cmd_init(cmd_print_t *outf);
94 /** Command ready function for __special__ cases.
95  * This need to be call if command implementation return CMDLINE_RETCODE_EXECUTING_CONTINUE
96  * because there is some background stuff ongoing before command is finally completed.
97  * Normally there is some event, which call cmd_ready().
98  * \param retcode return code for command
99  */
100 void cmd_ready(int retcode);
101 /** typedef for ready cb function */
102 typedef void (cmd_ready_cb_f)(int);
103 /**
104  * Configure cb which will be called after commands are executed
105  * or cmd_ready is called
106  * \param cb callback function for command ready
107  */
109 /**
110  * execute next command if any
111  * \param retcode last command return value
112  */
113 void cmd_next(int retcode);
114 /** Free cmd class */
115 void cmd_free(void);
116 /** Reset cmdline to default values
117  * detach external commands, delete all variables and aliases
118  */
119 void cmd_reset(void);
120 /** Configure command history size (default 32)
121  * \param max maximum history size
122  * max > 0 -> configure new value
123  * max = 0 -> just return current value
124  * \return current history max-size
125  */
126 uint8_t cmd_history_size(uint8_t max);
127 /** command line print function
128  * This function should be used when user want to print something to the console
129  * \param fmt console print function (like printf)
130  */
131 #if defined(__GNUC__) || defined(__CC_ARM)
132 void cmd_printf(const char *fmt, ...) __attribute__((__format__(__printf__, 1, 2)));
133 #else
134 void cmd_printf(const char *fmt, ...);
135 #endif
136 /** command line print function
137  * This function should be used when user want to print something to the console with vprintf functionality
138  * \param fmt The format string is a character string, beginning and ending in its initial shift state, if any. The format string is composed of zero or more directives.
139  * \param ap list of parameters needed by format string. This must correspond properly with the conversion specifier.
140  */
141 #if defined(__GNUC__) || defined(__CC_ARM)
142 void cmd_vprintf(const char *fmt, va_list ap) __attribute__((__format__(__printf__, 1, 0)));
143 #else
144 void cmd_vprintf(const char *fmt, va_list ap);
145 #endif
146 /** Reconfigure default cmdline out function (cmd_printf)
147  * \param outf select console print function
148  */
149 void cmd_out_func(cmd_print_t *outf);
150 /** Configure function, which will be called when Ctrl+A is pressed
151  * \param sohf control function which called every time when user input control keys
152  */
153 void cmd_ctrl_func(void (*sohf)(uint8_t c));
154 /**
155  * Configure mutex wait function
156  * By default, cmd_printf calls may not be thread safe, depending on the implementation of the used output.
157  * This can be used to set a callback function that will be called before each cmd_printf call.
158  * The specific implementation is up to the application developer, but simple mutex locking is assumed.
159  */
160 void cmd_mutex_wait_func(void (*mutex_wait_f)(void));
161 /**
162  * Configure mutex wait function
163  * By default, cmd_printf calls may not be thread safe, depending on the implementation of the used output.
164  * This can be used to set a callback function that will be called after each cmd_printf call.
165  * The specific implementation is up to the application developer, but simple mutex locking is assumed.
166  */
167 void cmd_mutex_release_func(void (*mutex_release_f)(void));
168 /**
169  * Retrieve output mutex lock
170  * This can be used to retrieve the output mutex when multiple cmd_printf/cmd_vprintf calls must be
171  * guaranteed to be grouped together in a thread safe manner. Must be released by a following call to
172  * cmd_mutex_unlock()
173  * For example:
174  * * \code
175  * cmd_mutex_lock();
176  for (i = 0; i < 10; i++) {
177  cmd_printf("%02x ", i);
178  }
179  // without locking a print from another thread could happen here
180  cmd_printf("\r\n);
181  cmd_mutex_unlock();
182  * \endcode
183  * Exact behaviour depends on the implementation of the configured mutex,
184  * but counting mutexes are required.
185  */
186 void cmd_mutex_lock(void);
187 /**
188  * Release output mutex lock
189  * This can be used to release the output mutex once it has been retrieved with cmd_mutex_lock()
190  * Exact behaviour depends on the implementation of the configured mutex,
191  * but counting mutexes are required.
192  */
193 void cmd_mutex_unlock(void);
194 /** Refresh output */
195 void cmd_output(void);
196 /** default cmd response function, use stdout
197  * \param fmt The format string is a character string, beginning and ending in its initial shift state, if any. The format string is composed of zero or more directives.
198  * \param ap list of parameters needed by format string. This must correspond properly with the conversion specifier.
199  */
200 void default_cmd_response_out(const char *fmt, va_list ap);
201 /** Initialize screen */
202 void cmd_init_screen(void);
203 /** Get echo state
204  * \return true if echo is on otherwise false
205  */
206 bool cmd_echo_state(void);
207 /** Echo off */
208 void cmd_echo_off(void);
209 /** Echo on */
210 void cmd_echo_on(void);
211 /** Enter character to console.
212  * insert key pressess to cmdline called from main loop of application
213  * \param u_data char to be added to console
214  */
215 void cmd_char_input(int16_t u_data);
216 /*
217  * Set the passthrough mode callback function. In passthrough mode normal command input handling is skipped and any
218  * received characters are passed to the passthrough callback function. Setting this to null will disable passthrough mode.
219  * \param passthrough_fnc The passthrough callback function
220  */
221 typedef void (*input_passthrough_func_t)(uint8_t c);
222 void cmd_input_passthrough_func(input_passthrough_func_t passthrough_fnc);
223 
224 /* Methods used for adding and handling of commands and aliases
225  */
226 
227 /** Callback called when your command is run.
228  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
229  * \param argv argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
230  */
231 typedef int (cmd_run_cb)(int argc, char *argv[]);
232 /** Add command to intepreter
233  * \param name command string
234  * \param callback This function is called when command line start executing
235  * \param info Command short description which is visible in help command, or null if not in use
236  * \param man Help page for this command. This is shown when executing command with invalid parameters or command with --help parameter. Can be null if not in use.
237  */
238 void cmd_add(const char *name, cmd_run_cb *callback, const char *info, const char *man);
239 
240 /** delete command from intepreter
241  * \param name command to be delete
242  */
243 void cmd_delete(const char *name);
244 /** Command executer.
245  * Command executer, which split&push command(s) to the buffer and
246  * start executing commands in cmd tasklet.
247  * if not, execute command directly.
248  * If command implementation returns CMDLINE_RETCODE_EXCUTING_CONTINUE,
249  * executor will wait for cmd_ready() before continue to next command.
250  * \param str command string, e.g. "help"
251  */
252 void cmd_exe(char *str);
253 /** Add alias to interpreter.
254  * Aliases are replaced with values before executing a command. All aliases must be started from beginning of line.
255  * null or empty value deletes alias.
256  * \code
257  cmd_alias_add("print", "echo");
258  cmd_exe("print \"hello world!\""); // this is now same as "echo \"hello world!\"" .
259  * \endcode
260  * \param alias alias name
261  * \param value value for alias. Values can be any visible ASCII -characters.
262  */
263 void cmd_alias_add(const char *alias, const char *value);
264 /** Add Variable to interpreter.
265  * Variables are replaced with values before executing a command.
266  * To use variables from cli, use dollar ($) -character so that interpreter knows user want to use variable in that place.
267  * null or empty value deletes variable.
268  * \code
269  cmd_variable_add("world", "hello world!");
270  cmd_exe("echo $world"); // this is now same as echo "hello world!" .
271  * \endcode
272  * \param variable Variable name, which will be replaced in interpreter.
273  * \param value Value for variable. Values can contains white spaces and '"' or '"' characters.
274  */
275 void cmd_variable_add(char *variable, char *value);
276 /**
277  * Add integer variable to interpreter.
278  * Variables are replaced with values before executing a command.
279  * \code
280  cmd_variable_add_int("world", 2);
281  cmd_exe("echo $world"); // this is now same as 'echo 2' .
282  * \endcode
283  * \param variable Variable name, which will be replaced in interpreter.
284  * \param value Value for variable
285 
286  */
287 void cmd_variable_add_int(char *variable, int value);
288 /**
289  * Request screen size from host
290  * Response are stored to variables:
291  * COLUMNS and LINES - as integer values.
292  * Note: Require terminal that handle request codes, like screen.
293  */
294 void cmd_request_screen_size(void);
295 
296 
297 /** find command parameter index by key.
298  * e.g.
299  * \code
300  int main(void){
301  //..init cmd..
302  //..
303  cmd_exe("mycmd enable")
304  }
305  int mycmd_command(int argc, char *argv[]) {
306  bool found = cmd_parameter_index( argc, argv, "enable" ) > 0;
307  }
308  * \endcode
309  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
310  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
311  * \param key option key, which index you want to find out.
312  * \return index where parameter was or -1 when not found
313  */
314 int cmd_parameter_index(int argc, char *argv[], const char *key);
315 /** check if command option is present.
316  * e.g. cmd: "mycmd -c"
317  * \code
318  * bool on = cmd_has_option( argc, argv, "p" );
319  * \endcode
320  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
321  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
322  * \param key option key to be find
323  * \return true if option found otherwise false
324  */
325 bool cmd_has_option(int argc, char *argv[], const char *key);
326 /** find command parameter by key.
327  * if exists, return true, otherwise false.
328  * e.g. cmd: "mycmd enable 1"
329  * \code
330  int mycmd_command(int argc, char *argv[]) {
331  bool value;
332  bool found = cmd_parameter_bool( argc, argv, "mykey", &value );
333  if( found ) return CMDLINE_RETCODE_SUCCESS;
334  else return CMDLINE_RETCODE_FAIL;
335  }
336  * \endcode
337  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
338  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
339  * \param key parameter key to be find
340  * \param value parameter value to be fetch, if key not found value are untouched. "1" and "on" and "true" and "enable" and "allow" are True -value, all others false.
341  * \return true if parameter key and value found otherwise false
342  */
343 bool cmd_parameter_bool(int argc, char *argv[], const char *key, bool *value);
344 /** find command parameter by key and return value (next parameter).
345  * if exists, return parameter pointer, otherwise null.
346  * e.g. cmd: "mycmd mykey myvalue"
347  * \code
348  int mycmd_command(int argc, char *argv[]) {
349  char *value;
350  bool found = cmd_parameter_val( argc, argv, "mykey", &value );
351  if( found ) return CMDLINE_RETCODE_SUCCESS;
352  else return CMDLINE_RETCODE_FAIL;
353  }
354  * \endcode
355  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
356  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
357  * \param key parameter key to be find
358  * \param value pointer to pointer, which will point to cli input data when key and value found. if key or value not found this parameter are untouched.
359  * \return true if parameter key and value found otherwise false
360  */
361 bool cmd_parameter_val(int argc, char *argv[], const char *key, char **value);
362 /** find command parameter by key and return value (next parameter) in integer. Only whitespaces are allowed in addition to the float to be read.
363  * e.g. cmd: "mycmd mykey myvalue"
364  * \code
365  int32_t value;
366  cmd_parameter_int( argc, argv, "key", &value );
367  * \endcode
368  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the item 0 in the list argv is a string to name of command.
369  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
370  * \param key parameter key to be found
371  * \param value A pointer to a variable where to write the converted number. If value cannot be converted, it is not touched.
372  * \return true if parameter key and an integer is found, otherwise return false
373  */
374 bool cmd_parameter_int(int argc, char *argv[], const char *key, int32_t *value);
375 /** find command parameter by key and return value (next parameter) in float. Only whitespaces are allowed in addition to the float to be read.
376  * e.g. cmd: "mycmd mykey myvalue"
377  * \code
378  float value;
379  cmd_parameter_float( argc, argv, "key", &value );
380  * \endcode
381  * \param argc argc is the count of arguments given in argv pointer list. values begin from 1 and this means that the item 0 in the list argv is a string to name of command.
382  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
383  * \param key parameter key to be found
384  * \param value A pointer to a variable where to write the converted number. If value cannot be converted, it is not touched.
385  * \return true if parameter key and a float found, otherwise return false
386  */
387 bool cmd_parameter_float(int argc, char *argv[], const char *key, float *value);
388 /** Get last command line parameter as string.
389  * e.g.
390  * cmd: "mycmd hello world"
391  * cmd_parameter_last -> "world"
392  * cmd: "mycmd"
393  * cmd_parameter_last() -> NULL
394  * \code
395  cmd_parameter_last(argc, argv)
396  * \endcode
397  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
398  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
399  * \return pointer to last parameter or NULL when there is no any parameters.
400  */
401 char *cmd_parameter_last(int argc, char *argv[]);
402 
403 /** find command parameter by key and return value (next parameter) in int64.
404  * e.g. cmd: "mycmd mykey myvalue"
405  * \code
406  uint32_t i;
407  cmd_parameter_timestamp( argc, argv, "mykey", &i );
408  * \endcode
409  *
410  * Supports following formats:
411  * number -> direct conversion
412  * 11:22:33:44:55:66:77:88 -> converts to number
413  * seconds,tics -> converts thread type timestamp to int64
414  *
415  * \param argc argc is the count of arguments given in argv pointer list. value begins from 1 and this means that the 0 item in list argv is a string to name of command.
416  * \param argv is list of arguments. List size is given in argc parameter. Value in argv[0] is string to name of command.
417  * \param key parameter key to be find
418  * \param value parameter value to be fetch, if key not found value are untouched.
419  * \return true if parameter key and value found otherwise false
420  */
421 bool cmd_parameter_timestamp(int argc, char *argv[], const char *key, int64_t *value);
422 
423 #ifdef __cplusplus
424 }
425 #endif
426 #endif /*_CMDLINE_H_*/
bool cmd_parameter_float(int argc, char *argv[], const char *key, float *value)
find command parameter by key and return value (next parameter) in float.
uint8_t cmd_history_size(uint8_t max)
Configure command history size (default 32)
bool cmd_parameter_val(int argc, char *argv[], const char *key, char **value)
find command parameter by key and return value (next parameter).
void cmd_mutex_lock(void)
Retrieve output mutex lock This can be used to retrieve the output mutex when multiple cmd_printf/cmd...
void cmd_ready(int retcode)
Command ready function for special cases.
void cmd_output(void)
Refresh output.
void cmd_init_screen(void)
Initialize screen.
The key size.
void cmd_ctrl_func(void(*sohf)(uint8_t c))
Configure function, which will be called when Ctrl+A is pressed.
void cmd_alias_add(const char *alias, const char *value)
Add alias to interpreter.
char * cmd_parameter_last(int argc, char *argv[])
Get last command line parameter as string.
void cmd_vprintf(const char *fmt, va_list ap)
command line print function This function should be used when user want to print something to the con...
void cmd_add(const char *name, cmd_run_cb *callback, const char *info, const char *man)
Add command to intepreter.
int( cmd_run_cb)(int argc, char *argv[])
Callback called when your command is run.
Definition: ns_cmdline.h:231
void( cmd_ready_cb_f)(int)
typedef for ready cb function
Definition: ns_cmdline.h:102
int cmd_parameter_index(int argc, char *argv[], const char *key)
find command parameter index by key.
void cmd_set_ready_cb(cmd_ready_cb_f *cb)
Configure cb which will be called after commands are executed or cmd_ready is called.
void( cmd_print_t)(const char *, va_list)
typedef for print functions
Definition: ns_cmdline.h:82
Callback< R()> callback(R(*func)()=0)
Create a callback class with type inferred from the arguments.
Definition: Callback.h:3848
bool cmd_echo_state(void)
Get echo state.
void cmd_exe(char *str)
Command executer.
void cmd_printf(const char *fmt,...)
command line print function This function should be used when user want to print something to the con...
void cmd_mutex_unlock(void)
Release output mutex lock This can be used to release the output mutex once it has been retrieved wit...
void cmd_variable_add(char *variable, char *value)
Add Variable to interpreter.
void cmd_echo_on(void)
Echo on.
bool cmd_parameter_timestamp(int argc, char *argv[], const char *key, int64_t *value)
find command parameter by key and return value (next parameter) in int64.
void cmd_next(int retcode)
execute next command if any
void cmd_char_input(int16_t u_data)
Enter character to console.
void default_cmd_response_out(const char *fmt, va_list ap)
default cmd response function, use stdout
void cmd_request_screen_size(void)
Request screen size from host Response are stored to variables: COLUMNS and LINES - as integer values...
void cmd_reset(void)
Reset cmdline to default values detach external commands, delete all variables and aliases...
bool cmd_parameter_bool(int argc, char *argv[], const char *key, bool *value)
find command parameter by key.
void cmd_mutex_release_func(void(*mutex_release_f)(void))
Configure mutex wait function By default, cmd_printf calls may not be thread safe, depending on the implementation of the used output.
void cmd_delete(const char *name)
delete command from intepreter
void cmd_out_func(cmd_print_t *outf)
Reconfigure default cmdline out function (cmd_printf)
bool cmd_parameter_int(int argc, char *argv[], const char *key, int32_t *value)
find command parameter by key and return value (next parameter) in integer.
void cmd_free(void)
Free cmd class.
void cmd_variable_add_int(char *variable, int value)
Add integer variable to interpreter.
void cmd_init(cmd_print_t *outf)
Initialize cmdline class.
void cmd_mutex_wait_func(void(*mutex_wait_f)(void))
Configure mutex wait function By default, cmd_printf calls may not be thread safe, depending on the implementation of the used output.
void cmd_echo_off(void)
Echo off.
bool cmd_has_option(int argc, char *argv[], const char *key)
check if command option is present.
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.