macro(inttohex INTVALUE OUTPUT_VARIABLE)
    list(APPEND HEXLIST 0 1 2 3 4 5 6 7 8 9 a b c d e f)
    list(GET HEXLIST ${INTVALUE} ${OUTPUT_VARIABLE})
endmacro()

macro(converttohex INTVALUE OUTPUT_VARIABLE)
    set(${OUTPUT_VARIABLE} "")
    set(REMAINING ${INTVALUE})
    while(REMAINING)
        math(EXPR REMAINDER "${REMAINING}%16")
        inttohex(${REMAINDER} HEXCHAR)
        math(EXPR REMAINING "${REMAINING}/16")
        set(${OUTPUT_VARIABLE} "${HEXCHAR}${${OUTPUT_VARIABLE}}")
    endwhile()
endmacro()

string(TIMESTAMP KERNEL_VERSION_BUILD %Y%m%d UTC)

set(KERNEL_VERSION_MAJOR "0")
set(KERNEL_VERSION_MINOR "5")
set(KERNEL_VERSION_PATCH_LEVEL "0")
set(COPYRIGHT_YEAR "2016")

# KERNEL_VERSION_BUILD_TYPE is "SVN" or "" (for the release)
set(KERNEL_VERSION_BUILD_TYPE "SVN")

# KERNEL_VERSION_RELEASE_TYPE is "RC1", "RC2" or "" (for the final one)
set(KERNEL_VERSION_RELEASE_TYPE "")

set(KERNEL_VERSION "${KERNEL_VERSION_MAJOR}.${KERNEL_VERSION_MINOR}")
if(KERNEL_VERSION_PATCH_LEVEL)
    set(KERNEL_VERSION "${KERNEL_VERSION}.${KERNEL_VERSION_PATCH_LEVEL}")
endif()
if(KERNEL_VERSION_BUILD_TYPE STREQUAL "SVN")
    set(KERNEL_VERSION "${KERNEL_VERSION}-${KERNEL_VERSION_BUILD_TYPE}")
elseif(NOT KERNEL_VERSION_RELEASE_TYPE STREQUAL "")
    set(KERNEL_VERSION "${KERNEL_VERSION}-${KERNEL_VERSION_RELEASE_TYPE}")
endif()

math(EXPR REACTOS_DLL_VERSION_MAJOR "${KERNEL_VERSION_MAJOR}+42")
set(DLL_VERSION_STR "${REACTOS_DLL_VERSION_MAJOR}.${KERNEL_VERSION_MINOR}")
if(KERNEL_VERSION_PATCH_LEVEL)
    set(DLL_VERSION_STR "${DLL_VERSION_STR}.${KERNEL_VERSION_PATCH_LEVEL}")
endif()
if(KERNEL_VERSION_BUILD_TYPE STREQUAL "SVN")
    set(DLL_VERSION_STR "${DLL_VERSION_STR}-${KERNEL_VERSION_BUILD_TYPE}")
elseif(NOT KERNEL_VERSION_RELEASE_TYPE STREQUAL "")
    set(DLL_VERSION_STR "${DLL_VERSION_STR}-${KERNEL_VERSION_RELEASE_TYPE}")
endif()

# get svn revision number
set(REVISION "rUNKNOWN")
set(KERNEL_VERSION_BUILD_HEX "0")
if(EXISTS "${REACTOS_SOURCE_DIR}/.svn" OR EXISTS "${REACTOS_SOURCE_DIR}/../.svn")
    find_package(Subversion)
    if(Subversion_FOUND)
        subversion_wc_info(${REACTOS_SOURCE_DIR} SVNINFO)
        if(SVNINFO_WC_REVISION)
            set(REVISION "r${SVNINFO_WC_REVISION}")
            converttohex(${SVNINFO_WC_REVISION} KERNEL_VERSION_BUILD_HEX)
        endif()
    endif()
endif()

configure_file(include/reactos/version.h.cmake ${REACTOS_BINARY_DIR}/include/reactos/version.h)
configure_file(include/reactos/buildno.h.cmake ${REACTOS_BINARY_DIR}/include/reactos/buildno.h)
configure_file(include/reactos/builddir.h.cmake ${REACTOS_BINARY_DIR}/include/reactos/builddir.h)