CMake utilities

CMakeUtils.cmake

# Get the whole directory content size (in bytes). Recursively adds all the files sizes.
function(get_directory_content_size DIR OUTPUT)
	message("Getting size of: ${DIR}")

	file(GLOB_RECURSE DIR_FILES "${DIR}/*.*")
	set(TOTAL_SIZE 0)
	set(TOTAL_COUNT 0)
	foreach(DIR_FILE ${DIR_FILES})
		file(SIZE ${DIR_FILE} DIR_FILE_SIZE)
		math(EXPR TOTAL_COUNT "${TOTAL_COUNT}+1")
		math(EXPR TOTAL_SIZE "${TOTAL_SIZE}+${DIR_FILE_SIZE}")
	endforeach()

	message("Found ${TOTAL_COUNT} file(s) of total size ${TOTAL_SIZE}B")

	set(${OUTPUT} ${TOTAL_SIZE} PARENT_SCOPE)
endfunction()

# Transforms a decimal number to hex form (0x00000000).
function(decimal_to_hex DEC OUTPUT)
		while(DEC GREATER 0)
				math(EXPR REMAINDER "${DEC} % 16")
				math(EXPR DEC "${DEC} / 16")
				if(REMAINDER EQUAL 10)
						set(REMAINDER "a")
				elseif(REMAINDER EQUAL 11)
						set(REMAINDER "b")
				elseif(REMAINDER EQUAL 12)
						set(REMAINDER "c")
				elseif(REMAINDER EQUAL 13)
						set(REMAINDER "d")
				elseif(REMAINDER EQUAL 14)
						set(REMAINDER "e")
				elseif(REMAINDER EQUAL 15)
						set(REMAINDER "f")
				endif()
				set(HEX "${REMAINDER}${HEX}")
		endwhile()
		set(${OUTPUT} "0x${HEX}" PARENT_SCOPE)
endfunction()