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cmake_minimum_required(VERSION 3.10)
macro(GET_DATE)
#
# All macro arguments are optional.
# If there's an ARGV0, use it as GD_PREFIX. Default = 'GD_'
# If there's an ARGV1, use it as ${GD_PREFIX}VERBOSE. Default = '0'
#
# If the date can be retrieved and parsed successfully, this macro
# will set the following CMake variables:
#
# GD_PREFIX
# ${GD_PREFIX}PREFIX (if '${GD_PREFIX}' is not 'GD_'...!)
# ${GD_PREFIX}VERBOSE
#
# ${GD_PREFIX}OV
#
# ${GD_PREFIX}REGEX
# ${GD_PREFIX}YEAR
# ${GD_PREFIX}MONTH
# ${GD_PREFIX}DAY
# ${GD_PREFIX}HOUR
# ${GD_PREFIX}MINUTE
# ${GD_PREFIX}SECOND
#
# Caller can then use these variables to construct names based on
# date and time stamps...
#
# If there's an ARGV0, use it as GD_PREFIX:
#
set(GD_PREFIX "GD_")
if(NOT "${ARGV0}" STREQUAL "")
set(GD_PREFIX "${ARGV0}")
endif()
if(NOT "${GD_PREFIX}" STREQUAL "GD_")
set(${GD_PREFIX}PREFIX "${GD_PREFIX}")
endif()
# If there's an ARGV1, use it as ${GD_PREFIX}VERBOSE:
#
set(${GD_PREFIX}VERBOSE "0")
if(NOT "${ARGV1}" STREQUAL "")
set(${GD_PREFIX}VERBOSE "${ARGV1}")
endif()
# Retrieve the current date and time in the format:
#
# 01/12/2006 08:55:12
# mm/dd/YYYY HH:MM:SS
#
unset(ENV{SOURCE_DATE_EPOCH})
string(TIMESTAMP "${GD_PREFIX}OV" "%m/%d/%Y %H:%M:%S")
if(${GD_PREFIX}VERBOSE)
message(STATUS "")
message(STATUS "<GET_DATE>")
message(STATUS "")
message(STATUS "GD_PREFIX='${GD_PREFIX}'")
if(NOT "${GD_PREFIX}" STREQUAL "GD_")
message(STATUS "${GD_PREFIX}PREFIX='${${GD_PREFIX}PREFIX}'")
endif()
message(STATUS "${GD_PREFIX}VERBOSE='${${GD_PREFIX}VERBOSE}'")
message(STATUS "")
message(STATUS "${GD_PREFIX}OV='${${GD_PREFIX}OV}'")
message(STATUS "")
endif()
#
# Extract six individual components by matching a regex with paren groupings.
# Use the replace functionality and \\1 through \\6 to extract components.
#
set(${GD_PREFIX}REGEX "([^/]+)/([^/]+)/([^ ]+) +([^:]+):([^:]+):([^\\.]+)")
string(REGEX REPLACE "${${GD_PREFIX}REGEX}" "\\1" ${GD_PREFIX}MONTH "${${GD_PREFIX}OV}")
string(REGEX REPLACE "${${GD_PREFIX}REGEX}" "\\2" ${GD_PREFIX}DAY "${${GD_PREFIX}OV}")
string(REGEX REPLACE "${${GD_PREFIX}REGEX}" "\\3" ${GD_PREFIX}YEAR "${${GD_PREFIX}OV}")
string(REGEX REPLACE "${${GD_PREFIX}REGEX}" "\\4" ${GD_PREFIX}HOUR "${${GD_PREFIX}OV}")
string(REGEX REPLACE "${${GD_PREFIX}REGEX}" "\\5" ${GD_PREFIX}MINUTE "${${GD_PREFIX}OV}")
string(REGEX REPLACE "${${GD_PREFIX}REGEX}" "\\6" ${GD_PREFIX}SECOND "${${GD_PREFIX}OV}")
if(${GD_PREFIX}VERBOSE)
message(STATUS "${GD_PREFIX}REGEX='${${GD_PREFIX}REGEX}'")
message(STATUS "${GD_PREFIX}YEAR='${${GD_PREFIX}YEAR}'")
message(STATUS "${GD_PREFIX}MONTH='${${GD_PREFIX}MONTH}'")
message(STATUS "${GD_PREFIX}DAY='${${GD_PREFIX}DAY}'")
message(STATUS "${GD_PREFIX}HOUR='${${GD_PREFIX}HOUR}'")
message(STATUS "${GD_PREFIX}MINUTE='${${GD_PREFIX}MINUTE}'")
message(STATUS "${GD_PREFIX}SECOND='${${GD_PREFIX}SECOND}'")
message(STATUS "")
message(STATUS "Counters that change...")
message(STATUS "")
message(STATUS " every second : ${${GD_PREFIX}YEAR}${${GD_PREFIX}MONTH}${${GD_PREFIX}DAY}${${GD_PREFIX}HOUR}${${GD_PREFIX}MINUTE}${${GD_PREFIX}SECOND}")
message(STATUS " daily : ${${GD_PREFIX}YEAR}${${GD_PREFIX}MONTH}${${GD_PREFIX}DAY}")
message(STATUS " monthly : ${${GD_PREFIX}YEAR}${${GD_PREFIX}MONTH}")
message(STATUS " annually : ${${GD_PREFIX}YEAR}")
message(STATUS "")
endif()
if(${GD_PREFIX}VERBOSE)
message(STATUS "</GET_DATE>")
message(STATUS "")
endif()
endmacro()
macro(ADD_SECONDS sec)
set(new_min ${${GD_PREFIX}MINUTE})
set(new_hr ${${GD_PREFIX}HOUR})
math(EXPR new_sec "${sec} + ${${GD_PREFIX}SECOND}")
while(${new_sec} GREATER_EQUAL 60)
math(EXPR new_sec "${new_sec} - 60")
math(EXPR new_min "${${GD_PREFIX}MINUTE} + 1")
endwhile()
while(${new_min} GREATER_EQUAL 60)
math(EXPR new_min "${new_min} - 60")
math(EXPR new_hr "${${GD_PREFIX}HOUR} + 1")
endwhile()
math(EXPR new_hr "${new_hr} % 24")
# Pad the H, M, S if needed
string(LENGTH ${new_sec} sec_len)
string(LENGTH ${new_min} min_len)
string(LENGTH ${new_hr} hr_len)
if(${sec_len} EQUAL 1)
set(new_sec "0${new_sec}")
endif()
if(${min_len} EQUAL 1)
set(new_min "0${new_min}")
endif()
if(${hr_len} EQUAL 1)
set(new_hr "0${new_hr}")
endif()
endmacro()
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