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################################################################################
# Macro definitions for some simple CMake utility functions.
################################################################################
################################################################################
# Functions for list operations.
################################################################################
macro(UNIQUE var_name list)
# Make the given list have only one instance of each unique element and
# store it in var_name.
set(${var_name} ${list})
list(REMOVE_DUPLICATES ${var_name})
endmacro()
macro(INTERSECTION var_name list1 list2)
# Store the intersection between the two given lists in var_name.
set(intersect_tmp "")
foreach(l ${list1})
if("${list2}" MATCHES "(^|;)${l}(;|$)")
list(APPEND intersect_tmp ${l})
endif()
endforeach()
set(${var_name} ${intersect_tmp})
endmacro()
macro(REMOVE var_name list1 list2)
# Remove elements in list2 from list1 and store the result in var_name.
set(${var_name} ${list1})
list(REMOVE_ITEM ${var_name} ${list2})
endmacro()
################################################################################
# Simple arithmetic.
################################################################################
macro(INCREMENT var_name input)
# Increment the input variable and store the result in var_name.
math(EXPR ${var_name} "${input} + 1")
endmacro()
macro(DECREMENT var_name input)
# Decrement the input variable and store the result in var_name.
math(EXPR ${var_name} "${input} - 1")
endmacro()
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