system/readline/Kconfig

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

config READLINE_HAVE_EXTMATCH
	bool
	default n

menuconfig SYSTEM_READLINE
	bool "readline() Support"
	default n
	---help---
		Enable support for the readline() function.

if SYSTEM_READLINE

config READLINE_ECHO
	bool "Echo character input"
	default y
	---help---
		Echo received character input back via stdout.  This is normal
		behavior and should be selected unless the source of stdin input
		already has local echo support or you need to suppress the back-channel
		responses for any other reason.

if READLINE_ECHO

config READLINE_TABCOMPLETION
	bool "Tab completion"
	default n
	depends on (BUILD_FLAT && BUILTIN) || READLINE_HAVE_EXTMATCH
	---help---
		Build in support for Unix-style tab completion.  This feature was
		originally provided by Nghia Ho.

if READLINE_TABCOMPLETION

config READLINE_MAX_BUILTINS
	int "Maximum built-in matches"
	default 64
	depends on BUILTIN
	---help---
		This the maximum number of matching names of builtin commands that
		will be displayed.

config READLINE_MAX_EXTCMDS
	int "Maximum external command matches"
	default 64
	depends on READLINE_HAVE_EXTMATCH
	---help---
		This the maximum number of matching names of external commands that
		will be displayed.

endif # READLINE_TABCOMPLETION

config READLINE_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 readline().  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.

if READLINE_CMD_HISTORY

config READLINE_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
		READLINE_CMD_HISTORY_LINELEN x READLINE_CMD_HISTORY_LEN. Default: 64/80

config READLINE_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 READLINE_CMD_HISTORY_LINELEN x READLINE_CMD_HISTORY_LEN.
		Default: 16

endif # READLINE_CMD_HISTORY
endif # READLINE_ECHO
endif # SYSTEM_READLINE