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@korzo89
Created March 5, 2017 13:11
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CMake dec<->hex conversion functions
function(from_hex HEX DEC)
string(SUBSTRING "${HEX}" 2 -1 HEX)
string(TOUPPER "${HEX}" HEX)
set(_res 0)
string(LENGTH "${HEX}" _strlen)
while(_strlen GREATER 0)
math(EXPR _res "${_res} * 16")
string(SUBSTRING "${HEX}" 0 1 NIBBLE)
string(SUBSTRING "${HEX}" 1 -1 HEX)
if(NIBBLE STREQUAL "A")
math(EXPR _res "${_res} + 10")
elseif(NIBBLE STREQUAL "B")
math(EXPR _res "${_res} + 11")
elseif(NIBBLE STREQUAL "C")
math(EXPR _res "${_res} + 12")
elseif(NIBBLE STREQUAL "D")
math(EXPR _res "${_res} + 13")
elseif(NIBBLE STREQUAL "E")
math(EXPR _res "${_res} + 14")
elseif(NIBBLE STREQUAL "F")
math(EXPR _res "${_res} + 15")
else()
math(EXPR _res "${_res} + ${NIBBLE}")
endif()
string(LENGTH "${HEX}" _strlen)
endwhile()
set(${DEC} ${_res} PARENT_SCOPE)
endfunction()
function(to_hex DEC HEX)
while(DEC GREATER 0)
math(EXPR _val "${DEC} % 16")
math(EXPR DEC "${DEC} / 16")
if(_val EQUAL 10)
set(_val "A")
elseif(_val EQUAL 11)
set(_val "B")
elseif(_val EQUAL 12)
set(_val "C")
elseif(_val EQUAL 13)
set(_val "D")
elseif(_val EQUAL 14)
set(_val "E")
elseif(_val EQUAL 15)
set(_val "F")
endif()
set(_res "${_val}${_res}")
endwhile()
set(${HEX} "0x${_res}" PARENT_SCOPE)
endfunction()
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