1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
28 /* Integrate the JIM TCL interpretor into the command processing. */
32 /* Jim is provied by eCos */
33 #include <cyg/jimtcl/jim.h>
38 /* To achieve C99 printf compatibility in MinGW, gnu_printf should be
39 * used for __attribute__((format( ... ))), with GCC v4.4 or later
41 #if (defined(IS_MINGW) && (((__GNUC__ << 16) + __GNUC_MINOR__) >= 0x00040004))
42 #define PRINTF_ATTRIBUTE_FORMAT gnu_printf
44 #define PRINTF_ATTRIBUTE_FORMAT printf
54 struct command_context;
56 /// The type signature for command context's output handler.
57 typedef int (*command_output_handler_t)(struct command_context *context,
60 struct command_context
62 enum command_mode mode;
63 struct command *commands;
67 * If the command fails, it *MUST* return a value != ERROR_OK
68 * (many commands break this rule, patches welcome!)
70 * This is *especially* important for commands such as writing
71 * to flash or verifying memory. The reason is that those commands
72 * can be used by programs to determine if the operation succeded
73 * or not. If the operation failed, then a program can try
74 * an alternative approach.
76 * Returning ERROR_COMMAND_SYNTAX_ERROR will have the effect of
77 * printing out the syntax of the command.
79 command_output_handler_t output_handler;
80 void *output_handler_priv;
84 * When run_command is called, a new instance will be created on the
85 * stack, filled with the proper values, and passed by reference to the
86 * required COMMAND_HANDLER routine.
88 struct command_invocation {
89 struct command_context *ctx;
96 * Command handlers may be defined with more parameters than the base
97 * set provided by command.c. This macro uses C99 magic to allow
98 * defining all such derivative types using this macro.
100 #define __COMMAND_HANDLER(name, extra...) \
101 int name(struct command_invocation *cmd, ##extra)
104 * Use this to macro to call a command helper (or a nested handler).
105 * It provides command handler authors protection against reordering or
106 * removal of unused parameters.
108 * @b Note: This macro uses lexical capture to provide some arguments.
109 * As a result, this macro should be used @b only within functions
110 * defined by the COMMAND_HANDLER or COMMAND_HELPER macros. Those
111 * macros provide the expected lexical context captured by this macro.
112 * Furthermore, it should be used only from the top-level of handler or
113 * helper function, or care must be taken to avoid redefining the same
114 * variables in intervening scope(s) by accident.
116 #define CALL_COMMAND_HANDLER(name, extra...) \
120 * Always use this macro to define new command handler functions.
121 * It ensures the parameters are ordered, typed, and named properly, so
122 * they be can be used by other macros (e.g. COMMAND_PARSE_NUMBER).
123 * All command handler functions must be defined as static in scope.
125 #define COMMAND_HANDLER(name) static __COMMAND_HANDLER(name)
128 * Similar to COMMAND_HANDLER, except some parameters are expected.
129 * A helper is globally-scoped because it may be shared between several
130 * source files (e.g. the s3c24xx device command helper).
132 #define COMMAND_HELPER(name, extra...) __COMMAND_HANDLER(name, extra)
135 * Use this macro to access the context of the command being handled,
136 * rather than accessing the variable directly. It may be moved.
138 #define CMD_CTX cmd->ctx
140 * Use this macro to access the number of arguments for the command being
141 * handled, rather than accessing the variable directly. It may be moved.
143 #define CMD_ARGC cmd->argc
145 * Use this macro to access the arguments for the command being handled,
146 * rather than accessing the variable directly. It may be moved.
148 #define CMD_ARGV cmd->argv
150 * Use this macro to access the name of the command being handled,
151 * rather than accessing the variable directly. It may be moved.
153 #define CMD_NAME cmd->name
156 /// The type signature for commands' handler functions.
157 typedef __COMMAND_HANDLER((*command_handler_t));
163 struct command *parent;
164 struct command *children;
165 command_handler_t handler;
166 enum command_mode mode;
167 struct command *next;
171 * @param c The command to be named.
172 * @param delim The character to place between command names.
173 * @returns A malloc'd string containing the full command name,
174 * which may include one or more ancestor components. Multiple names
175 * are separated by single spaces. The caller must free() the string
178 char *command_name(struct command *c, char delim);
181 * Commands should be registered by filling in one or more of these
182 * structures and passing them to register_command().
184 * A conventioal format should be used for help strings, to provide both
185 * usage and basic information:
187 * "@<options@> ... - some explanation text"
190 * @param name The name of the command to register, which must not have
191 * been registered previously in the intended context.
192 * @param handler The callback function that will be called. If NULL,
193 * then the command serves as a placeholder for its children or a script.
194 * @param mode The command mode(s) in which this command may be run.
195 * @param help The help text that will be displayed to the user.
197 struct command_registration {
199 command_handler_t handler;
200 enum command_mode mode;
205 * Register a command @c handler that can be called from scripts during
206 * the execution @c mode specified.
208 * If @c parent is non-NULL, the new command will be registered as a
209 * sub-command under it; otherwise, it will be available as a top-level
212 * @param cmd_ctx The command_context in which to register the command.
213 * @param parent Register this command as a child of this, or NULL to
214 * register a top-level command.
215 * @param rec A command_registration record that contains the desired
216 * command parameters.
217 * @returns The new command, if successful; otherwise, NULL.
219 struct command* register_command(struct command_context *cmd_ctx,
220 struct command *parent, const struct command_registration *rec);
222 #define COMMAND_REGISTER(_cmd_ctx, _parent, _name, _handler, _mode, _help) \
224 struct command_registration cr = { \
226 .handler = _handler, \
230 register_command(_cmd_ctx, _parent, &cr); \
234 * Unregisters command @c name from the given context, @c cmd_ctx.
235 * @param cmd_ctx The context of the registered command.
236 * @param parent The parent of the given command, or NULL.
237 * @param name The name of the command to unregister.
238 * @returns ERROR_OK on success, or an error code.
240 int unregister_command(struct command_context *cmd_ctx,
241 struct command *parent, const char *name);
243 * Unregisters all commands from the specfied context.
244 * @param cmd_ctx The context that will be cleared of registered commands.
245 * @param parent If given, only clear commands from under this one command.
246 * @returns ERROR_OK on success, or an error code.
248 int unregister_all_commands(struct command_context *cmd_ctx,
249 struct command *parent);
251 void command_set_output_handler(struct command_context* context,
252 command_output_handler_t output_handler, void *priv);
254 struct command_context* copy_command_context(struct command_context* context);
256 int command_context_mode(struct command_context *context, enum command_mode mode);
259 * Creates a new command context using the startup TCL provided.
261 struct command_context* command_init(const char *startup_tcl);
262 int command_done(struct command_context *context);
264 void command_print(struct command_context *context, const char *format, ...)
265 __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
266 void command_print_sameline(struct command_context *context, const char *format, ...)
267 __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
268 int command_run_line(struct command_context *context, char *line);
269 int command_run_linef(struct command_context *context, const char *format, ...)
270 __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
271 void command_output_text(struct command_context *context, const char *data);
273 void process_jim_events(void);
275 #define ERROR_COMMAND_CLOSE_CONNECTION (-600)
276 #define ERROR_COMMAND_SYNTAX_ERROR (-601)
277 #define ERROR_COMMAND_NOTFOUND (-602)
278 #define ERROR_COMMAND_ARGUMENT_INVALID (-603)
279 #define ERROR_COMMAND_ARGUMENT_OVERFLOW (-604)
280 #define ERROR_COMMAND_ARGUMENT_UNDERFLOW (-605)
282 extern Jim_Interp *interp;
284 void register_jim(struct command_context *context, const char *name,
285 Jim_CmdProc cmd, const char *help);
287 int parse_ulong(const char *str, unsigned long *ul);
288 int parse_ullong(const char *str, unsigned long long *ul);
290 int parse_long(const char *str, long *ul);
291 int parse_llong(const char *str, long long *ul);
293 #define DECLARE_PARSE_WRAPPER(name, type) \
294 int parse##name(const char *str, type *ul)
296 DECLARE_PARSE_WRAPPER(_uint, unsigned);
297 DECLARE_PARSE_WRAPPER(_u32, uint32_t);
298 DECLARE_PARSE_WRAPPER(_u16, uint16_t);
299 DECLARE_PARSE_WRAPPER(_u8, uint8_t);
301 DECLARE_PARSE_WRAPPER(_int, int);
302 DECLARE_PARSE_WRAPPER(_s32, int32_t);
303 DECLARE_PARSE_WRAPPER(_s16, int16_t);
304 DECLARE_PARSE_WRAPPER(_s8, int8_t);
307 * @brief parses the string @a in into @a out as a @a type, or prints
308 * a command error and passes the error code to the caller. If an error
309 * does occur, the calling function will return the error code produced
310 * by the parsing function (one of ERROR_COMMAND_ARGUMENT_*).
312 * This function may cause the calling function to return immediately,
313 * so it should be used carefully to avoid leaking resources. In most
314 * situations, parsing should be completed in full before proceding
315 * to allocate resources, and this strategy will most prevents leaks.
317 #define COMMAND_PARSE_NUMBER(type, in, out) \
319 int retval = parse_##type(in, &(out)); \
320 if (ERROR_OK != retval) { \
321 command_print(CMD_CTX, stringify(out) \
322 " option value ('%s') is not valid", in); \
328 * Parse the string @c as a binary parameter, storing the boolean value
329 * in @c out. The strings @c on and @c off are used to match different
330 * strings for true and false options (e.g. "on" and "off" or
331 * "enable" and "disable").
333 #define COMMAND_PARSE_BOOL(in, out, on, off) \
336 int retval = command_parse_bool_arg(in, &value); \
337 if (ERROR_OK != retval) { \
338 command_print(CMD_CTX, stringify(out) \
339 " option value ('%s') is not valid", in); \
340 command_print(CMD_CTX, " choices are '%s' or '%s'", \
347 int command_parse_bool_arg(const char *in, bool *out);
348 COMMAND_HELPER(handle_command_parse_bool, bool *out, const char *label);
350 /// parses an on/off command argument
351 #define COMMAND_PARSE_ON_OFF(in, out) \
352 COMMAND_PARSE_BOOL(in, out, "on", "off")
353 /// parses an enable/disable command argument
354 #define COMMAND_PARSE_ENABLE(in, out) \
355 COMMAND_PARSE_BOOL(in, out, "enable", "disable")
357 void script_debug(Jim_Interp *interp, const char *cmd,
358 unsigned argc, Jim_Obj *const *argv);
360 #endif /* COMMAND_H */