# Finds the International Components for Unicode (ICU) Library

#

#  ICU_FOUND          - True if ICU found.

#  ICU_I18N_FOUND     - True if ICU's internationalization library found.

#  ICU_INCLUDE_DIRS   - Directory to include to get ICU headers

#                       Note: always include ICU headers as, e.g.,

#                       unicode/utypes.h

#  ICU_LIBRARIES      - Libraries to link against for the common ICU

#  ICU_I18N_LIBRARIES - Libraries to link against for ICU internationaliation

#                       (note: in addition to ICU_LIBRARIES)

# Look for the header file.

FIND_PATH(

    ICU_INCLUDE_DIR

    NAMES unicode/utypes.h

    DOC "Include directory for the ICU library")

MARK_AS_ADVANCED(ICU_INCLUDE_DIR)

# Look for the library.

FIND_LIBRARY(

    ICU_LIBRARY

    NAMES icuuc cygicuuc cygicuuc32

    DOC "Libraries to link against for the common parts of ICU")

MARK_AS_ADVANCED(ICU_LIBRARY)

# Copy the results to the output variables.

IF (ICU_INCLUDE_DIR AND ICU_LIBRARY)

    SET(ICU_FOUND 1)

    SET(ICU_LIBRARIES ${ICU_LIBRARY})

    SET(ICU_INCLUDE_DIRS ${ICU_INCLUDE_DIR})

    SET(ICU_VERSION 0)

    SET(ICU_MAJOR_VERSION 0)

    SET(ICU_MINOR_VERSION 0)

    FILE(READ "${ICU_INCLUDE_DIR}/unicode/uversion.h" _ICU_VERSION_CONENTS)

    STRING(REGEX REPLACE ".*#define U_ICU_VERSION_MAJOR_NUM ([0-9]+).*" "\\1" ICU_MAJOR_VERSION "${_ICU_VERSION_CONENTS}")

    STRING(REGEX REPLACE ".*#define U_ICU_VERSION_MINOR_NUM ([0-9]+).*" "\\1" ICU_MINOR_VERSION "${_ICU_VERSION_CONENTS}")

    SET(ICU_VERSION "${ICU_MAJOR_VERSION}.${ICU_MINOR_VERSION}")

    # Look for the ICU internationalization libraries

    FIND_LIBRARY(

        ICU_I18N_LIBRARY

        NAMES icuin icui18n cygicuin cygicuin32

        DOC "Libraries to link against for ICU internationalization")

    MARK_AS_ADVANCED(ICU_I18N_LIBRARY)

    IF (ICU_I18N_LIBRARY)

        SET(ICU_I18N_FOUND 1)

        SET(ICU_I18N_LIBRARIES ${ICU_I18N_LIBRARY})

    ELSE ()

        SET(ICU_I18N_FOUND 0)

        SET(ICU_I18N_LIBRARIES)

    ENDIF ()

ELSE ()

    SET(ICU_FOUND 0)

    SET(ICU_I18N_FOUND 0)

    SET(ICU_LIBRARIES)

    SET(ICU_I18N_LIBRARIES)

    SET(ICU_INCLUDE_DIRS)

    SET(ICU_VERSION)

    SET(ICU_MAJOR_VERSION)

    SET(ICU_MINOR_VERSION)

ENDIF ()

IF (ICU_FOUND)

    IF (NOT ICU_FIND_QUIETLY)

        MESSAGE(STATUS "Found ICU header files in ${ICU_INCLUDE_DIRS}")

        MESSAGE(STATUS "Found ICU libraries: ${ICU_LIBRARIES}")

    ENDIF ()

ELSE ()

    IF (ICU_FIND_REQUIRED)

        MESSAGE(FATAL_ERROR "Could not find ICU")

    ELSE ()

        MESSAGE(STATUS "Optional package ICU was not found")

    ENDIF ()

ENDIF ()