# Module for locating the Crypto++ encryption library.
#
# Customizable variables:
#   CryptoPP_ROOT_DIR
#     This variable points to the CryptoPP root directory. On Windows the
#     library location typically will have to be provided explicitly using the
#     -D command-line option. The directory should include the include/cryptopp,
#     lib and/or bin sub-directories.
#
# Read-only variables:
#   CryptoPP_FOUND
#     Indicates whether the library has been found.
#
#   CryptoPP_INCLUDE_DIRS
#     Points to the CryptoPP include directory.
#
#   CryptoPP_LIBRARIES
#     Points to the CryptoPP libraries that should be passed to
#     target_link_libararies.
#
#
# Copyright (c) 2012 Sergiu Dotenco
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

INCLUDE (FindPackageHandleStandardArgs)

FIND_PATH (
	CryptoPP_ROOT_DIR
	NAMES cryptopp/cryptlib.h include/cryptopp/cryptlib.h
	PATHS ENV CRYPTOPPROOT
	DOC "CryptoPP root directory"
)

# Re-use the previous path:
FIND_PATH (
	CRYPTOPP_INCLUDE_DIR
	NAMES cryptopp/cryptlib.h
	HINTS ${CryptoPP_ROOT_DIR}
	PATH_SUFFIXES include
	DOC "CryptoPP include directory"
)

FIND_LIBRARY (
	CRYPTOPP_LIBRARY_DEBUG
	NAMES cryptlibd cryptoppd
	HINTS ${CryptoPP_ROOT_DIR}
	PATH_SUFFIXES lib
	DOC "CryptoPP debug library"
)

FIND_LIBRARY (
	CRYPTOPP_LIBRARY_RELEASE
	NAMES cryptlib cryptopp
	HINTS ${CryptoPP_ROOT_DIR}
	PATH_SUFFIXES lib
	DOC "CryptoPP release library"
)

IF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
	SET (
		CRYPTOPP_LIBRARY
		optimized ${CRYPTOPP_LIBRARY_RELEASE}
		debug ${CRYPTOPP_LIBRARY_DEBUG} CACHE DOC "CryptoPP library"
	)
ELSEIF (CRYPTOPP_LIBRARY_RELEASE)
	SET (
		CRYPTOPP_LIBRARY ${CRYPTOPP_LIBRARY_RELEASE} CACHE DOC
		"CryptoPP library"
	)
ENDIF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)

IF (CRYPTOPP_INCLUDE_DIR)
	SET (_CRYPTOPP_VERSION_HEADER ${CRYPTOPP_INCLUDE_DIR}/cryptopp/config.h)

	IF (EXISTS ${_CRYPTOPP_VERSION_HEADER})
		FILE (
			STRINGS ${_CRYPTOPP_VERSION_HEADER} _CRYPTOPP_VERSION_TMP REGEX
			"^#define CRYPTOPP_VERSION[ \t]+[0-9]+$"
		)

		STRING (
			REGEX REPLACE
			"^#define CRYPTOPP_VERSION[ \t]+([0-9]+)" "\\1" _CRYPTOPP_VERSION_TMP
			${_CRYPTOPP_VERSION_TMP}
		)

		STRING (
			REGEX REPLACE "([0-9]+)[0-9][0-9]" "\\1" CRYPTOPP_VERSION_MAJOR
			${_CRYPTOPP_VERSION_TMP}
		)
		STRING (
			REGEX REPLACE "[0-9]([0-9])[0-9]" "\\1" CRYPTOPP_VERSION_MINOR
			${_CRYPTOPP_VERSION_TMP}
		)
		STRING (
			REGEX REPLACE "[0-9][0-9]([0-9])" "\\1" CRYPTOPP_VERSION_PATCH
			${_CRYPTOPP_VERSION_TMP}
		)

		SET (CRYPTOPP_VERSION_COUNT 3)
		SET (
			CRYPTOPP_VERSION
			${CRYPTOPP_VERSION_MAJOR}.${CRYPTOPP_VERSION_MINOR}.${CRYPTOPP_VERSION_PATCH}
		)
	ENDIF (EXISTS ${_CRYPTOPP_VERSION_HEADER})
ENDIF (CRYPTOPP_INCLUDE_DIR)

SET (CryptoPP_INCLUDE_DIRS ${CRYPTOPP_INCLUDE_DIR})
SET (CryptoPP_LIBRARIES ${CRYPTOPP_LIBRARY})

MARK_AS_ADVANCED (
	CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARY CRYPTOPP_LIBRARY_DEBUG
	CRYPTOPP_LIBRARY_RELEASE
)

FIND_PACKAGE_HANDLE_STANDARD_ARGS (
	CryptoPP REQUIRED_VARS CryptoPP_ROOT_DIR
	CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARY VERSION_VAR CRYPTOPP_VERSION
)