# Copyright (c) 2020 Linumiz
# SPDX-License-Identifier: Apache-2.0

config ZEPHYR_LZ4_MODULE
	bool

menuconfig LZ4
	bool "Lz4 data compression and decompression"
	help
	  This option enables lz4 compression & decompression library
	  support.
if LZ4

config LZ4_MEMORY_USAGE
	int "Lz4 memory usage"
	range 10 20
	default 14
	help
	  Increasing memory usage improves compression ratio, but usually at the
	  cost of speed, due to cache locality. Memory usage 2^value (10 -> 1KB,
	  12 -> 4KB, 20 -> 1MB).

config LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION
	bool "Disable dynamic memory allocation"
	help
	  Disable lz4 functions that use dynamic memory allocation functions.

choice LZ4_HEAPMODE
	prompt "How stateless compression functions allocate memory for their hash table"
	default LZ4_HEAPMODE_HEAP

config LZ4_HEAPMODE_STACK
	bool "in memory stack"
	help
	  Allocate memory from stack (fastest).

config LZ4_HEAPMODE_HEAP
	bool "in memory heap"
	depends on !LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION
	help
	  Allocate memory from heap (requires malloc()).
endchoice

config LZ4_HIGH_COMPRESSION_VARIANT
	bool "Lz4 high compression variant"
	help
	  For more compression ratio at the cost of compression speed,
	  the High Compression variant called lz4hc is available. This variant
	  also compresses data using the lz4 block format.

if LZ4_HIGH_COMPRESSION_VARIANT
choice LZ4HC_HEAPMODE
	prompt "How stateless HC compression functions allocate memory for their workspace"
	default LZ4HC_HEAPMODE_HEAP

config LZ4HC_HEAPMODE_STACK
	bool "in memory stack"
	help
	  Allocate memory from stack (fastest).

config LZ4HC_HEAPMODE_HEAP
	bool "in memory heap"
	depends on !LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION
	help
	  Allocate memory from heap (requires malloc()).
endchoice
endif

config LZ4_XX_HASH
	bool "xxHash hashing algorithm"
	help
	  Build xxHash library included in lz4 sources.

config LZ4_FRAME_SUPPORT
	bool "LZ4 frame support"
	select LZ4_XX_HASH
	select LZ4_HIGH_COMPRESSION_VARIANT
	help
	  In order to produce compressed data compatible with lz4 command line
	  utility, it's necessary to use the official interoperable frame format.
	  This format is generated and decoded automatically by the lz4frame library.
	  Its public API is described in lib/lz4frame.h.

if LZ4_FRAME_SUPPORT
choice LZ4F_HEAPMODE
	prompt "Control how LZ4F_compressFrame() allocates the Compression State"
	default LZ4F_HEAPMODE_STACK

config LZ4F_HEAPMODE_STACK
	bool "in memory stack"
	help
	  Allocate memory from stack (fastest).

config LZ4F_HEAPMODE_HEAP
	bool "in memory heap"
	depends on !LZ4_DISABLE_DYNAMIC_MEMORY_ALLOCATION
	help
	  Allocate memory from heap (requires malloc()).
endchoice
endif

endif