#ifndef COMMAND_H
#define COMMAND_H
-#include "types.h"
+#include <helper/types.h>
/* Integrate the JIM TCL interpretor into the command processing. */
#if BUILD_ECOSBOARD
/* Jim is provied by eCos */
#include <cyg/jimtcl/jim.h>
#else
-#include "jim.h"
+#include <helper/jim.h>
#endif
-/* To achieve C99 printf compatibility in MinGW, gnu_printf should */
-/* be used for __attribute__((format( ... ))) */
-#ifdef IS_MINGW
+/* To achieve C99 printf compatibility in MinGW, gnu_printf should be
+ * used for __attribute__((format( ... ))), with GCC v4.4 or later
+ */
+#if (defined(IS_MINGW) && (((__GNUC__ << 16) + __GNUC_MINOR__) >= 0x00040004))
#define PRINTF_ATTRIBUTE_FORMAT gnu_printf
#else
#define PRINTF_ATTRIBUTE_FORMAT printf
COMMAND_ANY,
};
-typedef struct command_context_s
+struct command_context;
+
+/// The type signature for command context's output handler.
+typedef int (*command_output_handler_t)(struct command_context *context,
+ const char* line);
+
+struct command_context
{
+ Jim_Interp *interp;
enum command_mode mode;
- struct command_s *commands;
+ struct command *commands;
int current_target;
- /* Execute a command.
- *
- * If the command fails, it *MUST* return a value != ERROR_OK
- * (many commands break this rule, patches welcome!)
- *
- * This is *especially* important for commands such as writing
- * to flash or verifying memory. The reason is that those commands
- * can be used by programs to determine if the operation succeded
- * or not. If the operation failed, then a program can try
- * an alternative approach.
- *
- * Returning ERROR_COMMAND_SYNTAX_ERROR will have the effect of
- * printing out the syntax of the command.
- */
- int (*output_handler)(struct command_context_s *context, const char* line);
+ command_output_handler_t output_handler;
void *output_handler_priv;
-} command_context_t;
+};
+
+struct command;
+
+/**
+ * When run_command is called, a new instance will be created on the
+ * stack, filled with the proper values, and passed by reference to the
+ * required COMMAND_HANDLER routine.
+ */
+struct command_invocation {
+ struct command_context *ctx;
+ struct command *current;
+ const char *name;
+ unsigned argc;
+ const char **argv;
+};
+
+/**
+ * Command handlers may be defined with more parameters than the base
+ * set provided by command.c. This macro uses C99 magic to allow
+ * defining all such derivative types using this macro.
+ */
+#define __COMMAND_HANDLER(name, extra...) \
+ int name(struct command_invocation *cmd, ##extra)
+
+/**
+ * Use this to macro to call a command helper (or a nested handler).
+ * It provides command handler authors protection against reordering or
+ * removal of unused parameters.
+ *
+ * @b Note: This macro uses lexical capture to provide some arguments.
+ * As a result, this macro should be used @b only within functions
+ * defined by the COMMAND_HANDLER or COMMAND_HELPER macros. Those
+ * macros provide the expected lexical context captured by this macro.
+ * Furthermore, it should be used only from the top-level of handler or
+ * helper function, or care must be taken to avoid redefining the same
+ * variables in intervening scope(s) by accident.
+ */
+#define CALL_COMMAND_HANDLER(name, extra...) \
+ name(cmd, ##extra)
+
+/**
+ * Always use this macro to define new command handler functions.
+ * It ensures the parameters are ordered, typed, and named properly, so
+ * they be can be used by other macros (e.g. COMMAND_PARSE_NUMBER).
+ * All command handler functions must be defined as static in scope.
+ */
+#define COMMAND_HANDLER(name) static __COMMAND_HANDLER(name)
+
+/**
+ * Similar to COMMAND_HANDLER, except some parameters are expected.
+ * A helper is globally-scoped because it may be shared between several
+ * source files (e.g. the s3c24xx device command helper).
+ */
+#define COMMAND_HELPER(name, extra...) __COMMAND_HANDLER(name, extra)
-typedef struct command_s
+/**
+ * Use this macro to access the context of the command being handled,
+ * rather than accessing the variable directly. It may be moved.
+ */
+#define CMD_CTX cmd->ctx
+/**
+ * Use this macro to access the number of arguments for the command being
+ * handled, rather than accessing the variable directly. It may be moved.
+ */
+#define CMD_ARGC cmd->argc
+/**
+ * Use this macro to access the arguments for the command being handled,
+ * rather than accessing the variable directly. It may be moved.
+ */
+#define CMD_ARGV cmd->argv
+/**
+ * Use this macro to access the name of the command being handled,
+ * rather than accessing the variable directly. It may be moved.
+ */
+#define CMD_NAME cmd->name
+/**
+ * Use this macro to access the current command being handled,
+ * rather than accessing the variable directly. It may be moved.
+ */
+#define CMD_CURRENT cmd->current
+/**
+ * Use this macro to access the invoked command handler's data pointer,
+ * rather than accessing the variable directly. It may be moved.
+ */
+#define CMD_DATA CMD_CURRENT->jim_handler_data
+
+
+/**
+ * The type signature for command handling functions. They are
+ * usually registered as part of command_registration, providing
+ * a high-level means for executing a command.
+ *
+ * If the command fails, it *MUST* return a value != ERROR_OK
+ * (many commands break this rule, patches welcome!)
+ *
+ * This is *especially* important for commands such as writing
+ * to flash or verifying memory. The reason is that those commands
+ * can be used by programs to determine if the operation succeded
+ * or not. If the operation failed, then a program can try
+ * an alternative approach.
+ *
+ * Returning ERROR_COMMAND_SYNTAX_ERROR will have the effect of
+ * printing out the syntax of the command.
+ */
+typedef __COMMAND_HANDLER((*command_handler_t));
+
+struct command
{
char *name;
- struct command_s *parent;
- struct command_s *children;
- int (*handler)(struct command_context_s *context, char* name, char** args, int argc);
+ const char *help;
+ const char *usage;
+ struct command *parent;
+ struct command *children;
+ command_handler_t handler;
+ Jim_CmdProc jim_handler;
+ void *jim_handler_data;
+ enum command_mode mode;
+ struct command *next;
+};
+
+/**
+ * @param c The command to be named.
+ * @param delim The character to place between command names.
+ * @returns A malloc'd string containing the full command name,
+ * which may include one or more ancestor components. Multiple names
+ * are separated by single spaces. The caller must free() the string
+ * when done with it.
+ */
+char *command_name(struct command *c, char delim);
+
+/*
+ * Commands should be registered by filling in one or more of these
+ * structures and passing them to register_command().
+ *
+ * A conventioal format should be used for help strings, to provide both
+ * usage and basic information:
+ * @code
+ * "@<options@> ... - some explanation text"
+ * @endcode
+ *
+ * @param name The name of the command to register, which must not have
+ * been registered previously in the intended context.
+ * @param handler The callback function that will be called. If NULL,
+ * then the command serves as a placeholder for its children or a script.
+ * @param mode The command mode(s) in which this command may be run.
+ * @param help The help text that will be displayed to the user.
+ */
+struct command_registration {
+ const char *name;
+ command_handler_t handler;
+ Jim_CmdProc jim_handler;
+ void *jim_handler_data;
enum command_mode mode;
- struct command_s *next;
-} command_t;
-
-extern command_t* register_command(command_context_t *context, command_t *parent, char *name, int (*handler)(struct command_context_s *context, char* name, char** args, int argc), enum command_mode mode, char *help);
-extern int unregister_command(command_context_t *context, char *name);
-extern int unregister_all_commands(command_context_t *context);
-extern void command_set_output_handler(command_context_t* context, int (*output_handler)(struct command_context_s *context, const char* line), void *priv);
-extern command_context_t* copy_command_context(command_context_t* context);
-extern int command_context_mode(command_context_t *context, enum command_mode mode);
-extern command_context_t* command_init(void);
-extern int command_done(command_context_t *context);
-
-extern void command_print(command_context_t *context, const char *format, ...)
+ const char *help;
+ /// a string listing the options and arguments, required or optional
+ const char *usage;
+
+ /**
+ * If non-NULL, the commands in @c chain will be registered in
+ * the same context and scope of this registration record.
+ * This allows modules to inherit lists commands from other
+ * modules.
+ */
+ const struct command_registration *chain;
+};
+
+/// Use this as the last entry in an array of command_registration records.
+#define COMMAND_REGISTRATION_DONE { .name = NULL, .chain = NULL }
+
+/**
+ * Register a command @c handler that can be called from scripts during
+ * the execution @c mode specified.
+ *
+ * If @c parent is non-NULL, the new command will be registered as a
+ * sub-command under it; otherwise, it will be available as a top-level
+ * command.
+ *
+ * @param cmd_ctx The command_context in which to register the command.
+ * @param parent Register this command as a child of this, or NULL to
+ * register a top-level command.
+ * @param rec A command_registration record that contains the desired
+ * command parameters.
+ * @returns The new command, if successful; otherwise, NULL.
+ */
+struct command* register_command(struct command_context *cmd_ctx,
+ struct command *parent, const struct command_registration *rec);
+
+/**
+ * Register one or more commands in the specified context, as children
+ * of @c parent (or top-level commends, if NULL). In a registration's
+ * record contains a non-NULL @c chain member and name is NULL, the
+ * commands on the chain will be registered in the same context.
+ * Otherwise, the chained commands are added as children of the command.
+ *
+ * @param cmd_ctx The command_context in which to register the command.
+ * @param parent Register this command as a child of this, or NULL to
+ * register a top-level command.
+ * @param cmds Pointer to an array of command_registration records that
+ * contains the desired command parameters. The last record must have
+ * NULL for all fields.
+ * @returns ERROR_OK on success; ERROR_FAIL if any registration fails.
+ */
+int register_commands(struct command_context *cmd_ctx, struct command *parent,
+ const struct command_registration *cmds);
+
+
+/**
+ * Unregisters command @c name from the given context, @c cmd_ctx.
+ * @param cmd_ctx The context of the registered command.
+ * @param parent The parent of the given command, or NULL.
+ * @param name The name of the command to unregister.
+ * @returns ERROR_OK on success, or an error code.
+ */
+int unregister_command(struct command_context *cmd_ctx,
+ struct command *parent, const char *name);
+/**
+ * Unregisters all commands from the specfied context.
+ * @param cmd_ctx The context that will be cleared of registered commands.
+ * @param parent If given, only clear commands from under this one command.
+ * @returns ERROR_OK on success, or an error code.
+ */
+int unregister_all_commands(struct command_context *cmd_ctx,
+ struct command *parent);
+
+struct command *command_find_in_context(struct command_context *cmd_ctx,
+ const char *name);
+struct command *command_find_in_parent(struct command *parent,
+ const char *name);
+
+/**
+ * Update the private command data field for a command and all descendents.
+ * This is used when creating a new heirarchy of commands that depends
+ * on obtaining a dynamically created context. The value will be available
+ * in command handlers by using the CMD_DATA macro.
+ * @param c The command (group) whose data pointer(s) will be updated.
+ * @param p The new data pointer to use for the command or its descendents.
+ */
+void command_set_handler_data(struct command *c, void *p);
+
+void command_set_output_handler(struct command_context* context,
+ command_output_handler_t output_handler, void *priv);
+
+
+int command_context_mode(struct command_context *context, enum command_mode mode);
+
+/* Return the current command context associated with the Jim interpreter or
+ * alternatively the global default command interpreter
+ */
+struct command_context *current_command_context(Jim_Interp *interp);
+/**
+ * Creates a new command context using the startup TCL provided and
+ * the existing Jim interpreter, if any. If interp == NULL, then command_init
+ * creates a command interpreter.
+ */
+struct command_context* command_init(const char *startup_tcl, Jim_Interp *interp);
+/**
+ * Creates a copy of an existing command context. This does not create
+ * a deep copy of the command list, so modifications in one context will
+ * affect all shared contexts. The caller must track reference counting
+ * and ensure the commands are freed before destroying the last instance.
+ * @param cmd_ctx The command_context that will be copied.
+ * @returns A new command_context with the same state as the original.
+ */
+struct command_context* copy_command_context(struct command_context* cmd_ctx);
+/**
+ * Frees the resources associated with a command context. The commands
+ * are not removed, so unregister_all_commands() must be called first.
+ * @param context The command_context that will be destroyed.
+ */
+void command_done(struct command_context *context);
+
+void command_print(struct command_context *context, const char *format, ...)
__attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
-extern void command_print_sameline(command_context_t *context, const char *format, ...)
+void command_print_sameline(struct command_context *context, const char *format, ...)
__attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
-extern int command_run_line(command_context_t *context, char *line);
-extern int command_run_linef(command_context_t *context, const char *format, ...)
+int command_run_line(struct command_context *context, char *line);
+int command_run_linef(struct command_context *context, const char *format, ...)
__attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
-extern void command_output_text(command_context_t *context, const char *data);
+void command_output_text(struct command_context *context, const char *data);
-extern void process_jim_events(void);
+void process_jim_events(struct command_context *cmd_ctx);
#define ERROR_COMMAND_CLOSE_CONNECTION (-600)
#define ERROR_COMMAND_SYNTAX_ERROR (-601)
#define ERROR_COMMAND_ARGUMENT_OVERFLOW (-604)
#define ERROR_COMMAND_ARGUMENT_UNDERFLOW (-605)
-extern int fast_and_dangerous;
-
-extern Jim_Interp *interp;
-
-void register_jim(command_context_t *context, const char *name, int (*cmd)(Jim_Interp *interp, int argc, Jim_Obj *const *argv), const char *help);
-
-long jim_global_long(const char *variable);
-
int parse_ulong(const char *str, unsigned long *ul);
int parse_ullong(const char *str, unsigned long long *ul);
DECLARE_PARSE_WRAPPER(_s16, int16_t);
DECLARE_PARSE_WRAPPER(_s8, int8_t);
-void script_debug(Jim_Interp *interp, const char *cmd, int argc, Jim_Obj *const *argv);
+/**
+ * @brief parses the string @a in into @a out as a @a type, or prints
+ * a command error and passes the error code to the caller. If an error
+ * does occur, the calling function will return the error code produced
+ * by the parsing function (one of ERROR_COMMAND_ARGUMENT_*).
+ *
+ * This function may cause the calling function to return immediately,
+ * so it should be used carefully to avoid leaking resources. In most
+ * situations, parsing should be completed in full before proceding
+ * to allocate resources, and this strategy will most prevents leaks.
+ */
+#define COMMAND_PARSE_NUMBER(type, in, out) \
+ do { \
+ int retval = parse_##type(in, &(out)); \
+ if (ERROR_OK != retval) { \
+ command_print(CMD_CTX, stringify(out) \
+ " option value ('%s') is not valid", in); \
+ return retval; \
+ } \
+ } while (0)
+
+/**
+ * Parse the string @c as a binary parameter, storing the boolean value
+ * in @c out. The strings @c on and @c off are used to match different
+ * strings for true and false options (e.g. "on" and "off" or
+ * "enable" and "disable").
+ */
+#define COMMAND_PARSE_BOOL(in, out, on, off) \
+ do { \
+ bool value; \
+ int retval = command_parse_bool_arg(in, &value); \
+ if (ERROR_OK != retval) { \
+ command_print(CMD_CTX, stringify(out) \
+ " option value ('%s') is not valid", in); \
+ command_print(CMD_CTX, " choices are '%s' or '%s'", \
+ on, off); \
+ return retval; \
+ } \
+ out = value; \
+ } while (0)
+
+int command_parse_bool_arg(const char *in, bool *out);
+COMMAND_HELPER(handle_command_parse_bool, bool *out, const char *label);
+
+/// parses an on/off command argument
+#define COMMAND_PARSE_ON_OFF(in, out) \
+ COMMAND_PARSE_BOOL(in, out, "on", "off")
+/// parses an enable/disable command argument
+#define COMMAND_PARSE_ENABLE(in, out) \
+ COMMAND_PARSE_BOOL(in, out, "enable", "disable")
+
+void script_debug(Jim_Interp *interp, const char *cmd,
+ unsigned argc, Jim_Obj *const *argv);
#endif /* COMMAND_H */