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* improve command prohibition error reportZachary T Welch2009-11-301-2/+10
| | | | | | Ensures that the correct information gets displayed, depending on the mode of the command being denied. Fixes misreporting all commands as needing to run "before 'init'".
* remove interp global variable!Zachary T Welch2009-11-302-19/+21
| | | | | | | Finish removing references to the 'interp' global variable from the command module, encapsulating all reference via command_context. Eliminates use of the global entirely, so it can be removed. Hurrah!
* command output capture: do not use interp globalZachary T Welch2009-11-301-15/+34
| | | | | | Adds a log_capture_state structure to pass to the log capture callback used by the command module. Ensures that the capture occurs in the proper context.
* do not extern 'interp' from command.cZachary T Welch2009-11-302-3/+2
| | | | | Adds 'interp' field to command_context, chasing the few remaining references to the global variable outside of the command module.
* make syntax errors respond with 'usage'Zachary T Welch2009-11-302-4/+4
| | | | | | The 'help' text will become more verbose, so its entire text will be far more than desired when you only borked your syntax. The usage still allows the commands to be looked up for more help.
* move improperly located documentationZachary T Welch2009-11-301-15/+17
| | | | | Somehow, the comment block for command handlers ended up associated with the output_handler. Move it to the command_handler_t declaration.
* improve command_done() API and docsZachary T Welch2009-11-302-6/+19
| | | | | | | | | | | | | | | | | | command_done() does not need to return an error, but it needed Doxygen comment. Provide some for copy_command_context as well. Note: this audit revealed some potential bugs with the command context implementation. There was a reason that commands were added at the end of the list. Shallow copying of command_context means that the list is shared between them. And commands added at the top-level before the pre-existing commands will not be available in the shared context as they were before. Yikes! Fortunately, this does not seem to occur in general use, as 'add_help_text' gets registered in startup.tcl and claims the first slot in my own test cases. Thus, it seems that we have been masking the issue for now, but it shows the need for further architectural improvement in the core command module.
* only display usable commands in helpZachary T Welch2009-11-301-0/+3
| | | | | | | With the ability to defer 'init', users can access the help system while still in CONFIG mode. This patch omits commands from the help and usage list when they cannot be run in the current command mode, making it much easier to see what can be done at a given time.
* remove redundant 'rm' command handlerZachary T Welch2009-11-281-27/+0
| | | | | | Two 'rm' commands were implemented and registered. This removes the version that would have never been called prior to refactoring the command registration.
* add error checking in command_newZachary T Welch2009-11-281-20/+30
| | | | | | Adds checks for memory allocation failures. Started to use calloc() instead of malloc()/memset(), but I got carried away. This kind of work should be done throughout the tree, but it's almost hopeless at present.
* include mode information in help text.Zachary T Welch2009-11-281-3/+27
| | | | | Extends the help output to list the valid modes for each commands. Fixes a memory leak of the returned command_name() string.
* refactor command mode detectionZachary T Welch2009-11-281-2/+7
| | | | | | | | | | | Splits the check for a command's ability to run into a helper. This also fixes a bug whereby commands that specified COMMAND_EXEC were allowed to run during the configuration stage. This allowed problematic commands to be called before 'init', defeating the intention of specifying that command mode. With this change, the run_command() helper denies access to handlers that should run only after 'init' during the configuration stage.
* add command private data setter/accessorZachary T Welch2009-11-282-0/+31
| | | | | | | | | | Presently, commands registration taks a static handler data pointer. This patch adds support for commands that require a dynamic pointer, such as those registered in a dynamic context (e.g. subcommands for a user-created 'foo.cpu' command). The command_set_handler_data will update a command (group) to use a new context pointer, while the CMD_DATA macro allows command handlers to access the value. Jim handlers should find this value in interp->cmdPrivData.
* add 'command mode' introspective handlerZachary T Welch2009-11-281-0/+39
| | | | | Allows scripts to behave different depending on the current mode. Also allows introspection of the mode required for commands.
* remove unknown handlerZachary T Welch2009-11-282-36/+38
| | | | | | | | | | | | | | Updates command registration to provide top-level handlers for all commands, rather than falling back onto the 'unknown' command. Instead, that same handler is registered for placeholders, providing the same functionality under the root verb command name instead. This permits users to implement their own 'unknown' function, and it resolves some mind-bending breakage related to function object lookup while recursing. Changes 'ocd_bounce' to call 'ocd_command' and 'ocd_help' from the wrapper directly, rather than bouncing through their wrappers. This prevents endless recursion caused by the above changes, whereby the 'command' wrapper's type check would blow the stack to hell and gone.
* improve command handler wrapper scriptZachary T Welch2009-11-282-3/+26
| | | | | | | | | | Adds 'ocd_bouncer' in startup.tcl that is called as a helper for all command handlers, shrinking the embedded C wrapper to a mere stub. Jim handlers are called directly, simple handlers get called with the wrapper to capture and discard their output on error, and placeholders call help directly (though the unknown handler still does this too). It attempts to improve the quality of the error messages as well.
* add 'command type' introspective handlerZachary T Welch2009-11-281-0/+43
| | | | | | | | Adds the 'command' group handler, with the 'type' command producing a string that tells whether the given command is 'native' (for Jim-based command handlers), 'simple' (for simple built-in commands), 'group' for command group placeholders, and 'unknown' if not found in the command registration tables (e.g. core built-ins functions).
* fix regression causing duplicated outputZachary T Welch2009-11-271-13/+28
| | | | | | | | | | | | | | | | | | | | | | | | The command refactoring caused subcommand handlers to produce duplicate output when run. The problem was introduced by failing to ensure all such invocations went through a top-level "catcher" script, prefixing the command name with the 'ocd_' prefix and consuming its results. The fix is to ensure such a top-level "catcher" script gets created for each top-level command, regardless of whether it has a handler. Indeed, this patch removes all command registrations for sub-commands, which would not have worked in the new registration scheme anyway. For now, dispatch of subcommands continues to be handled by the new 'unknown' command handler, which gets fixed here to strip the 'ocd_' prefix if searching for the top-level command name fails initially. Some Jim commands may be registered with this prefix, and that situation seems to require the current fallback approach. Otherwise, that prefix could be stripped unconditionally and the logic made a little simpler. The same problem must be handled by the 'help' command handler too, so its lookup process works as intended. Overall, the command dispatching remains more complicated than desired, but this patch fixes the immediate regressions.
* support OPENOCD_DEBUG_LEVEL environment settingZachary T Welch2009-11-251-0/+13
| | | | | Detect the OPENOCD_DEBUG_LEVEL setting in log_init(), allowing the very early startup phases to be debugged.
* log: improve initializationZachary T Welch2009-11-252-9/+7
| | | | | | Removes redundant assignment of start_ms from log_register_commands(). Eliminates command_context parameter and return value. Adds Doxygen comment block for this API call.
* add script_command_run helperZachary T Welch2009-11-251-26/+19
| | | | | Eliminates duplicated code in script_command and handle_unknown_command. Fixes bug with duplicated help output generated by placeholder commands.
* encapsulate and re-use log capture, retval setupZachary T Welch2009-11-251-49/+43
| | | | | | | | | Factors log capture while running script commands, eliminating duplicated code between script_command and jim_capture. Factors setting a command's Jim "retval" into a new helper as well. Using these new helpers in the new unknown command handler's fixes possible regressions caused by these bits being missing.
* combine help and usage command handlersZachary T Welch2009-11-251-20/+8
| | | | Remove duplicated handler code by checking the running command name.
* improve usage and help command outputZachary T Welch2009-11-242-44/+38
| | | | | Rewrite formatting code in C, removing last remenants of TCL help code. Sinificantly improves the readability by using smarter indent and wrap.
* allow scripts to update usage informationZachary T Welch2009-11-242-7/+36
| | | | | | The add_usage_text command uses the same C handler, which was updated to support its new polymorphic role. This patch updates the two script commands that needed this support: 'find' and 'script'.
* add jim_handler to command_registrationZachary T Welch2009-11-243-41/+68
| | | | | | Adding jim_handler field to command_registration allows removing the register_jim helper. All command registrations now go through the register_command{,s}() functions.
* refactor command_new to use command_registrationZachary T Welch2009-11-241-12/+10
| | | | Save stack space: use a struct. Makes it easier to add new parameters.
* log: use register_commands()Zachary T Welch2009-11-241-5/+19
| | | | | Use register_commands() for logging callbacks. Improve help and add proper usage.
* ioutil: use register_commands()Zachary T Welch2009-11-241-17/+45
| | | | Use table instead of individual calls. Add proper usage information.
* rewrite 'unknown' command dispatching in CZachary T Welch2009-11-242-17/+65
| | | | | Rewrite the magical 'unknown' command in C as a Jim handler, allowing it to dispatch commands to any level in the tree.
* add public API for locating commandsZachary T Welch2009-11-242-0/+15
| | | | | Allow other modules to find a command, primarily for the purpose of registering and unregistering subcommands.
* refactor script_command context grabbingZachary T Welch2009-11-241-12/+16
| | | | Move command context acquisition to current_command_context() for re-use.
* add command registration chainingZachary T Welch2009-11-242-8/+37
| | | | | | | | | Adds the ability to chain registration structures. Modules can define a command with the 'chain' and 'num_chain' fields defined in their registration table, and the register_commands() function will initialize these commands. If the registration record creates a new command, then the chained commands are created under it; otherwise, they are created in the same context as the other commands (i.e. the parent argument).
* more command registration refactoringZachary T Welch2009-11-241-16/+38
| | | | | Split out the handler registration into its own function, and add a few obviously missing NULL pointer error checking.
* command: use register_commands for handlersZachary T Welch2009-11-241-17/+34
| | | | | | Use register_commands() to register low-level command handlers, adding a builtin_command_handlers declaration that is easy to understand. Splits help and usage information into their appropriate fields.
* add command usage, separate from helpZachary T Welch2009-11-242-14/+52
| | | | | | Adds the usage command, to display usage information for commands. The output for this command will remain erronenously empty until commands are updated to use these new coventions.
* add register_commands for batch registrationZachary T Welch2009-11-242-0/+36
| | | | | | The register_commands API takes multiple commands in one call, allowing modules to declare and pass a much simpler (and more explicit) array of command_registration records.
* add struct command_registrationZachary T Welch2009-11-242-23/+45
| | | | | | | | | Add a structure to encapsulate command registration information, rather than passing them all as parameters. Enables further API changes that require additional required or optional parameters. Updates the register_command API and COMMAND_REGISTER macro to use it, along with their documentation.
* use COMMAND_REGISTER macroZachary T Welch2009-11-243-11/+11
| | | | | Replaces direct calls to register_command() with a macro, to allow its parameters to be changed and callers updated in phases.
* add COMMAND_REGISTER macroZachary T Welch2009-11-241-0/+4
| | | | | | | | Provides a migration path for the widely used register_command API, which needs to be updated to provide new functionality. This macro allows the API to change without having to update all of its callers at the same time.
* improve startup tcl scriptsZachary T Welch2009-11-241-4/+0
| | | | | Fix a couple of layering violations missed in the last round. Add missing comment headers.
* improve alloc_vprintfAndreas Fritiofson2009-11-241-27/+16
| | | | | | | | | | | | | | The previous implementation was unnecessarily complex. Get rid of the loops, let vsnprintf() tell us directly how much storage we need and allocate that. A second pass writes the actual string. Also add a va_end() that was missing. This should be much faster for large strings and less wasteful for small ones. A quirk that has been retained is that some callers patch in a newline at the end of the returned string and depend on alloc_vprintf to allocate at least one byte extra. Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com> Signed-off-by: Zachary T Welch <zw@superlucidity.net>
* support for scripts in $HOME/.openocdAndreas Fritiofson2009-11-241-1/+16
| | | | | | | | | | | | | Add $HOME/.openocd as the first default script search directory, allowing the user to override the standard scripts. Update the user guide with information on where OpenOCD expects to find configuration files and scripts. Also fixed some minor formatting issues. Add entry to NEWS as well. Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* embedded: reduce stack usageØyvind Harboe2009-11-221-4/+9
| | | | | | | Allocate working structures on stack to avoid issues with path lengths + reduce stack usage. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* show script search dirs in debug logAndreas Fritiofson2009-11-211-0/+2
| | | | | | | | | | Add this to ease debugging why the standard scripts aren't found on the default script search path in some build/install enviroments. Especially on Windows it's not straight forward where openocd actually looks for the scripts. Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* maintain command lists in sorted orderZachary T Welch2009-11-201-7/+17
| | | | | Use insertion sort to the command link lists. The only practical effect of this is to order the output of the new 'help' command.
* add add_help_text command handlerZachary T Welch2009-11-202-44/+67
| | | | | | | | | | Rewrite means for scripts to register help text for commands. These cause the new commands to be stored in the command heirarchy, with built-in commands; however, they will never be invoked there because they do not receive a command handler. The same trick is used for the Jim commands. Remove the old helpers that were used to register commands.
* provide command context during cmd_initZachary T Welch2009-11-201-0/+2
| | | | | | For the startup.tcl code to use built-in commands, the context must be associated with the interpreter temporarily. This will be required to add help text.
* improve 'help' commandZachary T Welch2009-11-203-20/+55
| | | | | | | | | | | Rewrites 'help' command in C, using new 'cmd_help' for display. Adds the built-in 'help' COMMAND_HANDLER to provide better output than the TCL-based script command (e.g. heirarchical listing of commands). The help string is stored in the command structure, though it conitnues to be pushed into the Jim environment. The current idiomatic usage suggests the addition of a usage field as well, to provide two levels of detail for users to consume (i.e. terse usage list, or verbose help).
* factor help script command into partsZachary T Welch2009-11-201-28/+34
| | | | | | | | Creates a helper function, cmd_help, which displays the help string for a single command. Presently, it is called from the loop in help. The routine has been extended to allow indentation of command groups, so an improved help command can improve the display of information.
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