* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
- * Copyright (C) 2007,2008 Øyvind Harboe *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* This program is free software; you can redistribute it and/or modify *
#ifndef COMMAND_H
#define COMMAND_H
+#include "types.h"
+
+/* Integrate the JIM TCL interpretor into the command processing. */
+#if BUILD_ECOSBOARD
#include <stdio.h>
+#include <stdarg.h>
+/* Jim is provied by eCos */
+#include <cyg/jimtcl/jim.h>
+#else
+#include "jim.h"
+#endif
+
+/* 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
+#endif
enum command_mode
{
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
{
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;
+};
+
+
+/**
+ * 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_context *cmd_ctx, \
+ const char *args[], unsigned argc, ##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_ctx, args, argc, ##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)
-typedef struct command_s
+/**
+ * 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)
+
+/**
+ * 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 args[-1]
+
+
+/// The type signature for commands' handler functions.
+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);
+ struct command *parent;
+ struct command *children;
+ command_handler_t handler;
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();
-extern int command_done(command_context_t *context);
-extern void command_print(command_context_t *context, char *format, ...);
-extern void command_print_sameline(command_context_t *context, char *format, ...);
-extern int command_run_line(command_context_t *context, char *line);
-extern int command_run_linef(command_context_t *context, char *format, ...);
-extern void command_output_text(command_context_t *context, const char *data);
+ 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);
+
+struct command* register_command(struct command_context *context,
+ struct command *parent, char *name, command_handler_t handler,
+ enum command_mode mode, char *help);
+
+int unregister_command(struct command_context *context, char *name);
+int unregister_all_commands(struct command_context *context);
+
+void command_set_output_handler(struct command_context* context,
+ command_output_handler_t output_handler, void *priv);
+
+struct command_context* copy_command_context(struct command_context* context);
+
+int command_context_mode(struct command_context *context, enum command_mode mode);
+
+struct command_context* command_init(void);
+int command_done(struct command_context *context);
+
+void command_print(struct command_context *context, const char *format, ...)
+ __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
+void command_print_sameline(struct command_context *context, const char *format, ...)
+ __attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 2, 3)));
+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)));
+void command_output_text(struct command_context *context, const char *data);
+
+void process_jim_events(void);
#define ERROR_COMMAND_CLOSE_CONNECTION (-600)
#define ERROR_COMMAND_SYNTAX_ERROR (-601)
#define ERROR_COMMAND_NOTFOUND (-602)
+#define ERROR_COMMAND_ARGUMENT_INVALID (-603)
+#define ERROR_COMMAND_ARGUMENT_OVERFLOW (-604)
+#define ERROR_COMMAND_ARGUMENT_UNDERFLOW (-605)
extern int fast_and_dangerous;
-/* Integrate the JIM TCL interpretor into the command processing. */
-#include <stdarg.h>
-#if BUILD_ECOSBOARD
-/* Jim is provied by eCos */
-#include <cyg/jimtcl/jim.h>
-#else
-#define JIM_EMBEDDED
-#include "jim.h"
-#endif
-
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);
+void register_jim(struct command_context *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);
+
+int parse_long(const char *str, long *ul);
+int parse_llong(const char *str, long long *ul);
+
+#define DECLARE_PARSE_WRAPPER(name, type) \
+ int parse##name(const char *str, type *ul)
+
+DECLARE_PARSE_WRAPPER(_uint, unsigned);
+DECLARE_PARSE_WRAPPER(_u32, uint32_t);
+DECLARE_PARSE_WRAPPER(_u16, uint16_t);
+DECLARE_PARSE_WRAPPER(_u8, uint8_t);
+
+DECLARE_PARSE_WRAPPER(_int, int);
+DECLARE_PARSE_WRAPPER(_s32, int32_t);
+DECLARE_PARSE_WRAPPER(_s16, int16_t);
+DECLARE_PARSE_WRAPPER(_s8, int8_t);
+
+/**
+ * @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)
+
+void script_debug(Jim_Interp *interp, const char *cmd,
+ unsigned argc, Jim_Obj *const *argv);
#endif /* COMMAND_H */
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