#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

menuconfig SYSTEM_CLE
	bool "EMACS-like Command Line Editor"
	default n
	---help---
		Enable support for NuttX tiny EMACS-like command line editor.

		Omitted features:
			- No keypad cursor control support
			- No word oriented operations.

		Assumptions and Limitations:
			- A VT100 host terminal is assumed.
			- A fixed width character set (like Courier) is assumed

		Memory Usage:  Looks like 1.5-2KB

if SYSTEM_CLE

config SYSTEM_CLE_CMD_HISTORY
	bool "Command line history"
	default n
	---help---
		Build in support for Unix-style command history using up and down
		arrow keys.  This feature was originally provided by Nghia Ho.

		NOTE: Command line history is kept in an in-memory array and is
		shared.  In the FLAT or PROTECTED builds, this history is shared by
		all threads; in the KERNEL build, the command line history is shared
		by all threads in the process.  This means that in a FLAT build, for
		example, a built-in application started from NSH will have the same
		history as does NSH if it also uses the CLE.  This also means
		that different NSH sessions on serial, USB, or Telnet will also
		share the same history array.

		In a KERNEL build, each process will have a separately allocated
		history array so the issue is lessened.  History would still be
		shared amount pthreads within the same process, however.

if SYSTEM_CLE_CMD_HISTORY

config SYSTEM_CLE_CMD_HISTORY_LINELEN
	int "Command line history length"
	default 64 if DEFAULT_SMALL
	default 80 if !DEFAULT_SMALL
	---help---
		The maximum length of one command line in the in-memory array.  The
		total memory usage for the command line array will be
		SYSTEM_CLE_CMD_HISTORY_LINELEN x SYSTEM_CLE_CMD_HISTORY_LEN. Default:
		64/80

config SYSTEM_CLE_CMD_HISTORY_LEN
	int "Command line history records"
	default 4 if DEFAULT_SMALL
	default 16 if !DEFAULT_SMALL
	---help---
		The number of lines of history that will be buffered in the in-
		memory array.  The total memory usage for the command line array
		will be SYSTEM_CLE_CMD_HISTORY_LINELEN x SYSTEM_CLE_CMD_HISTORY_LEN.
		Default: 16

endif # SYSTEM_CLE_CMD_HISTORY

config SYSTEM_CLE_DEBUGLEVEL
	int "Debug level"
	default 0
	range 0 2
	---help---
		0=Debug off; 1=Print errors on console; 2=Print debug information
		on the console.

		Debug output is generated with syslog.  The editor works on
		/dev/console.  In order to get both a usable display and also
		readable debug output, syslog'ing should sent to some device other
		than /dev/console (which is the default).

endif # SYSTEM_CLE