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#.rst:
# ExtractVersion
# --------------
#
# Extracts version numbers from a version string::
#
# extract_version (<name> [REVERSE_NAME])
#
#
# Tries to extract the following variables (the second version is used
# if REVERSE_NAME is set as argument)::
#
# <name>_MAJOR_VERSION or <name>_VERSION_MAJOR - <name> major version
# <name>_MINOR_VERSION or <name>_VERSION_MINOR - <name> minor version
# <name>_PATCH_VERSION or <name>_VERSION_PATCH - <name> patch version
# <name>_TWEAK_VERSION or <name>_VERSION_TWEAK - <name> tweak version
# <name>_VERSION_COUNT - number of version components, 0 to 4
#=============================================================================
# Copyright 2013 Istituto Italiano di Tecnologia (IIT)
# Authors: Daniele E. Domenichelli <daniele.domenichelli@iit.it>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
if(DEFINED __EXTRACT_VERSION_INCLUDED)
return()
endif()
set(__EXTRACT_VERSION_INCLUDED TRUE)
macro(EXTRACT_VERSION _name)
if("x${ARGV2}" STREQUAL "xREVERSE_NAME")
set(_reverse 1)
endif()
if(${_name}_VERSION)
string(REPLACE "." ";" _version_list ${${_name}_VERSION})
list(LENGTH _version_list _version_size)
if (_version_size GREATER 0)
if(NOT _reverse)
list(GET _version_list 0 ${_name}_MAJOR_VERSION)
else()
list(GET _version_list 0 ${_name}_VERSION_MAJOR)
endif()
endif()
if (_version_size GREATER 1)
if(NOT _reverse)
list(GET _version_list 1 ${_name}_MINOR_VERSION)
else()
list(GET _version_list 1 ${_name}_VERSION_MINOR)
endif()
endif()
if (_version_size GREATER 2)
if(NOT _reverse)
list(GET _version_list 2 ${_name}_PATCH_VERSION)
else()
list(GET _version_list 2 ${_name}_VERSION_PATCH)
endif()
endif()
if (_version_size GREATER 3)
if(NOT _reverse)
list(GET _version_list 3 ${_name}_TWEAK_VERSION)
else()
list(GET _version_list 3 ${_name}_VERSION_TWEAK)
endif()
endif()
if(${_version_size} GREATER 4)
set(${_name}_VERSION_COUNT 4)
else()
set(${_name}_VERSION_COUNT ${_version_size})
endif()
else()
set(${_name}_VERSION_COUNT 0)
endif()
unset(_version_list)
unset(_version_size)
endmacro()
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