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# opkbuild
# lib/common
# Functions for stack memory management.
#
# Copyright (C) 2012 Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
[ -n "${_OB_COMMON_SM}" ] && return 0
_OB_COMMON_SM='true'
_OB_STACK_VARS=
_OB_SAVED_IFS=
_ob_local()
{
# Push the variable list onto the stack.
_OB_STACK_VARS="${_OB_STACK_VARS}|${*}"
# Save the old IFS value, if any, and set it to its default.
_OB_SAVED_IFS="${IFS}"
IFS='
'
}
_ob_return()
{
# Unset the variables at the top of the stack.
IFS=' '
unset -v ${_OB_STACK_VARS##*|}
# Pop the variable list from the top of the stack.
_OB_STACK_VARS="${_OB_STACK_VARS%|*}"
# Restore the saved IFS.
IFS="${_OB_SAVED_IFS}"
return ${1}
}
_ob_validate_var_name()
{
case "${1}" in
[!a-zA-Z_]*|*[!a-zA-Z0-9_]*)
return 1
;;
esac
return 0
}
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