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# Copyright Contributors to the OpenVDB Project
# SPDX-License-Identifier: MPL-2.0
#
#[=======================================================================[.rst:
OpenVDBUtils.cmake
------------------
A utility CMake file which provides helper functions for configuring an
OpenVDB installation.
Use this module by invoking include with the form::
include ( OpenVDBUtils )
The following functions are provided:
``OPENVDB_GET_VERSION_DEFINE``
OPENVDB_GET_VERSION_DEFINE ( <header_path> <key> <value> )
Parse the provided version file to retrieve the a given OpenVDB define
specified by <key> and store the result in <value>. If the define has a
value, the value is stored. If the define has no value but exists, ON is
stored. Else, OFF is stored.
If the file does not exist, <value> is unmodified.
``OPENVDB_VERSION_FROM_HEADER``
OPENVDB_VERSION_FROM_HEADER ( <header_path>
VERSION [<version>]
MAJOR [<version>]
MINOR [<version>]
PATCH [<version>] )
Parse the provided version file to retrieve the current OpenVDB
version information. The file is expected to be a version.h file
as found in the following path of an OpenVDB repository:
openvdb/version.h
If the file does not exist, variables are unmodified.
``OPENVDB_ABI_VERSION_FROM_PRINT``
OPENVDB_ABI_VERSION_FROM_PRINT ( <vdb_print>
[QUIET]
ABI [<version>] )
Retrieve the ABI version that an installation of OpenVDB was compiled
for using the provided vdb_print binary. Parses the result of:
vdb_print --version
If the binary does not exist or fails to launch, variables are
unmodified.
#]=======================================================================]
cmake_minimum_required(VERSION 3.18)
function(OPENVDB_GET_VERSION_DEFINE HEADER KEY VALUE)
if(NOT EXISTS ${HEADER})
return()
endif()
file(STRINGS "${HEADER}" details REGEX "^#define[\t ]+${KEY}[\t ]+.*")
if(details)
# define has a value, extract it and return
string(REGEX REPLACE "^.*${KEY}[\t ]+([0-9]*).*$" "\\1" details "${details}")
set(${VALUE} ${details} PARENT_SCOPE)
return()
endif()
# try re-searching for single defines
file(STRINGS "${HEADER}" details REGEX "^#define[\t ]+${KEY}.*")
if(details)
set(${VALUE} ON PARENT_SCOPE)
else()
set(${VALUE} OFF PARENT_SCOPE)
endif()
endfunction()
########################################################################
########################################################################
function(OPENVDB_VERSION_FROM_HEADER OPENVDB_VERSION_FILE)
cmake_parse_arguments(_VDB "" "VERSION;MAJOR;MINOR;PATCH;ABI" "" ${ARGN})
if(NOT EXISTS ${OPENVDB_VERSION_FILE})
return()
endif()
OPENVDB_GET_VERSION_DEFINE(${OPENVDB_VERSION_FILE} "OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER" _OpenVDB_MAJOR_VERSION)
OPENVDB_GET_VERSION_DEFINE(${OPENVDB_VERSION_FILE} "OPENVDB_LIBRARY_MINOR_VERSION_NUMBER" _OpenVDB_MINOR_VERSION)
OPENVDB_GET_VERSION_DEFINE(${OPENVDB_VERSION_FILE} "OPENVDB_LIBRARY_PATCH_VERSION_NUMBER" _OpenVDB_PATCH_VERSION)
OPENVDB_GET_VERSION_DEFINE(${OPENVDB_VERSION_FILE} "OPENVDB_ABI_VERSION_NUMBER" _OpenVDB_ABI_VERSION)
if(_VDB_VERSION)
set(${_VDB_VERSION}
${_OpenVDB_MAJOR_VERSION}.${_OpenVDB_MINOR_VERSION}.${_OpenVDB_PATCH_VERSION}
PARENT_SCOPE
)
endif()
if(_VDB_MAJOR)
set(${_VDB_MAJOR} ${_OpenVDB_MAJOR_VERSION} PARENT_SCOPE)
endif()
if(_VDB_MINOR)
set(${_VDB_MINOR} ${_OpenVDB_MINOR_VERSION} PARENT_SCOPE)
endif()
if(_VDB_PATCH)
set(${_VDB_PATCH} ${_OpenVDB_PATCH_VERSION} PARENT_SCOPE)
endif()
if(_VDB_ABI)
set(${_VDB_ABI} ${_OpenVDB_ABI_VERSION} PARENT_SCOPE)
endif()
endfunction()
########################################################################
########################################################################
function(OPENVDB_ABI_VERSION_FROM_PRINT OPENVDB_PRINT)
cmake_parse_arguments(_VDB "QUIET" "ABI" "" ${ARGN})
if(NOT EXISTS ${OPENVDB_PRINT})
return()
endif()
set(_VDB_PRINT_VERSION_STRING "")
set(_VDB_PRINT_RETURN_STATUS "")
if(${_VDB_QUIET})
execute_process(COMMAND ${OPENVDB_PRINT} "--version"
RESULT_VARIABLE _VDB_PRINT_RETURN_STATUS
OUTPUT_VARIABLE _VDB_PRINT_VERSION_STRING
ERROR_QUIET
OUTPUT_STRIP_TRAILING_WHITESPACE
)
else()
execute_process(COMMAND ${OPENVDB_PRINT} "--version"
RESULT_VARIABLE _VDB_PRINT_RETURN_STATUS
OUTPUT_VARIABLE _VDB_PRINT_VERSION_STRING
OUTPUT_STRIP_TRAILING_WHITESPACE
)
endif()
if(${_VDB_PRINT_RETURN_STATUS})
return()
endif()
set(_OpenVDB_ABI)
string(REGEX REPLACE ".*abi([0-9]*).*" "\\1" _OpenVDB_ABI ${_VDB_PRINT_VERSION_STRING})
unset(_VDB_PRINT_RETURN_STATUS)
unset(_VDB_PRINT_VERSION_STRING)
if(_VDB_ABI)
set(${_VDB_ABI} ${_OpenVDB_ABI} PARENT_SCOPE)
endif()
endfunction()
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