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

config LIBC_LZF
	bool "LZF compression"
	default n
	---help---
		Enable the LZF compression library from Marc Alexander Lehmann

if LIBC_LZF

choice
	prompt "Compression options"
	default LIBC_LZF_SMALL
	---help---
		Trade-offs between faster and smaller compression.  These sections
		have no effect on decompression.

config LIBC_LZF_SMALL
	bool "Better compression"

config LIBC_LZF_FAST
	bool "Faster compression"

config LIBC_LZF_FASTEST
	bool "Fastest compression"

endchoice # Compression options

config LIBC_LZF_HLOG
	int "Log2 Hash table size"
	default 13
	range 1 22
	---help---
		Size of hashtable is (1 << HLOG) * sizeof (char *).  Decompression is
		independent of the hash table size the difference between 15 and 14 is
		very small for small blocks (and 14 is usually a bit faster).  For a
		low-memory/faster configuration, use HLOG == 13;  For best compression,
		use 15 or 16 (or more, up to 22).

		Memory usage for the hash table will be approximately:

			4 * (1 << CONFIG_LIBC_LZF_HLOG)

		For the default setting of 13, this is 32Kb.  A setting of 12 would
		be half that or about 16Kb.

		The application calling lzf_compress() must provide the hash table to
		the compresser and may allocate that memory in the most efficient way
		for the application.

#ifndef HLOG
#  define HLOG 13
#endif


config LIBC_LZF_ALIGN
	bool "Strict alignment"
	default y
	---help---
		Unconditionally aligning does not cost very much, so do it if unsure.

endif # LIBC_LZF