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path: root/src/helper/command.c
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* 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 Welch2009-11-281-0/+8
| | | | | | | | | | 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 Welch2009-11-281-34/+36
| | | | | | | | | | | | | | 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 Welch2009-11-281-3/+2
| | | | | | | | | | 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.
* 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 Welch2009-11-241-10/+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 Welch2009-11-241-4/+32
| | | | | | 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 Welch2009-11-241-20/+22
| | | | | | 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.
* rewrite 'unknown' command dispatching in CZachary T Welch2009-11-241-0/+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 Welch2009-11-241-0/+10
| | | | | 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 Welch2009-11-241-6/+24
| | | | | | | | | 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 Welch2009-11-241-14/+49
| | | | | | 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 Welch2009-11-241-0/+17
| | | | | | 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 Welch2009-11-241-7/+10
| | | | | | | | | 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 Welch2009-11-241-3/+3
| | | | | Replaces direct calls to register_command() with a macro, to allow its parameters to be changed and callers updated in phases.
* 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 Welch2009-11-201-29/+66
| | | | | | | | | | 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 Welch2009-11-201-2/+54
| | | | | | | | | | | 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).
* refactor command registrationZachary T Welch2009-11-201-77/+71
| | | | | | | | | Refactors the command registration to use helpers to simplify the code. The unregistration routines were made more flexible by allowing them to operate on a single command, such that one can remove all of a commands children in one step (perhaps before adding back a 'config' subcommand that allows getting the others back). Eliminates a bit of duplicated code and adds full API documentation for these routines.
* change command_find helper interfaceZachary T Welch2009-11-201-4/+3
| | | | Avoid requiring double pointers where a single would suffice.
* factor script_command argv allocationZachary T Welch2009-11-201-27/+38
| | | | Splits argument allocation out from script command, reusing free() code.
* remove fast command and jim_global_longZachary T Welch2009-11-181-29/+0
| | | | | | | | Removing the fast command eliminates the fast_and_dangerous global, which was used only by arm7_9_common as an initializer. The command is not called in the tree; instead, more explicit commands are used. The jim_global_long function was not used anywhere in the tree.
* change all bool parsers to accept any valueZachary T Welch2009-11-181-3/+3
| | | | | | | | | This patch changes the behavior of all boolean parsing callers to accept any one of "true/enable/on/yes/1" or "false/disable/off/no/0". Since one particular pair will be most appropriate in any given situation, the specific macros should continue to be used in order to display the most informative error messages possible.
* add handle_command_parse_bool command helperZachary T Welch2009-11-181-0/+50
| | | | | | | | | Rewrite arm11_handle_bool to provide a generic on/off command helper. Refactors COMMAND_PARSE_BOOL to use new command_parse_bool helper, which gets reused by the new command_parse_bool_any helper. This later helper is called by the new command helper function to accepts any on/off, enable/disable, true/false, yes/no, or 0/1 parameter.
* pass startup_tcl to command_initZachary T Welch2009-11-181-2/+1
| | | | | Removes external linkage from helper module, making the startup code a parameter to a new command context's initialization routine.
* remove unused variable from run_commandZachary T Welch2009-11-171-3/+2
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* add CMD_NAME variable in command_invocationZachary T Welch2009-11-171-7/+7
| | | | | Update CMD_NAME from its migratory home in CMD_ARGV[-1] to cmd->name. Allows CMD_ARGV++ idiom to be used safely in command handlers.
* add struct command_invocation for COMMAND_HANDLERZachary T Welch2009-11-171-3/+6
| | | | | | | | | | Adds the command_invocation structure to encapsulate parameters for all COMMAND_HANDLER routines. Rather than passing several arguments to each successive subroutine, a single pointer may be passed around. Changes the CMD_* macros to reference the new fields. Updates run_command to create an instance and pass it to the handler.
* command_handler: change 'args' to CMD_ARGVZachary T Welch2009-11-171-4/+4
| | | | | This patch converts all instances of 'args' in COMMAND_HANDLER routines to use CMD_ARGV macro.
* command_handler: change to 'argc' to CMD_ARGCZachary T Welch2009-11-171-3/+3
| | | | | This patch converts all instances of 'argc' in COMMAND_HANDLER routines to use CMD_ARGC.
* use Jim_CmdProc in jim_registerZachary T Welch2009-11-161-1/+2
| | | | The jim_register command just needed to use the type defined by jim.h.
* command_t -> struct commandZachary T Welch2009-11-131-17/+17
| | | | Remove misleading typedef and redundant suffix from struct command.
* command_context_t -> struct command_contextZachary T Welch2009-11-131-20/+20
| | | | Remove misleading typedef and redundant suffix from struct command_context.
* command_handler_t: make cmd an indirect parameterZachary T Welch2009-11-131-7/+9
| | | | | This patch removes 'cmd' from the list of direct parameters, moving that pointer to args[-1] (by way of the new CMD_NAME macro).
* command_handler_t: make args parameter constZachary T Welch2009-11-131-4/+6
| | | | | This patch prevents command handlers from modifying the strings passed in the 'args' array.
* use COMMAND_HANDLER macro to define all commandsZachary T Welch2009-11-131-3/+2
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* add command_handler_t typeZachary T Welch2009-11-131-3/+1
| | | | | | This patch adds new typedefs for command handler callback functions. Users of this type signature were updated to use these new types. It uses the new __COMMAND_HANDLER macro to prevent duplication.
* add command_output_handler_tZachary T Welch2009-11-131-1/+2
| | | | | Add a typedef for command output handler function type, simplifying the appearance of functions that use it and eliminating duplicate code.
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