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#!/bin/sh
################################################################################
# shld
################################################################################
__last_tu=''
static()
{
local arg=
local var=
local val=
local exp=
for arg in "${@}"; do
case "${arg}" in
*=*)
var="${arg%%=*}"
val="$(printf "${arg#*=}" | \
sed "s|'|'\\\\''|g")"
;;
*)
var="${arg}"
val=''
;;
esac
# Sanitize variable name.
case "${var}" in
[!A-Za-z_]* | *[!0-9A-Za-z_]*)
printf 'Syntax error: %s %s\n' \
'illegal static variable name:' \
"${var}" >&2
;;
esac
# Set up static variable assignments to be evaluated on scope
# change.
exp="__${__tu}_static_var_vals="
exp="${exp}\"\${__${__tu}_static_var_vals} ${var}='${val}'\""
eval "${exp}"
# Set up list of static variables to be cleaned up on scope
# change.
exp="__${__tu}_static_vars=\"\${__${__tu}_static_vars} ${var}\""
eval "${exp}"
# Set up static variables for current scope.
eval "${var}='${val}'"
done
# Clean up static variables from previous scope.
if ! [ "x${__last_tu}" = 'x' ]; then
eval "unset \${__${__last_tu}_static_vars}"
fi
__last_tu="${__tu}"
}
__set_up_static_vars()
{
local tu="${1}"
# Clean up static variables from previous scope.
if ! [ "x${__last_tu}" = 'x' ]; then
eval "unset \${__${__last_tu}_static_vars}"
fi
__last_tu="${tu}"
# Set up static variables for specified scope.
eval "$(eval printf '%s' "\"$(eval printf '%s' \
"'\${__${tu}_static_var_vals}'")\"")"
}
################################################################################
# TU 0
################################################################################
__tu='tu0'
__tu0_locals=''
static static_var0='tu0 static_var0'
tu0_fn0()
{ __set_up_static_vars 'tu0'
echo "tu0"
echo "\tstatic_var0: $static_var0"
echo "\tstatic_var1: $static_var1"
}
################################################################################
# TU 1
################################################################################
__tu='tu1'
__tu1_locals=''
static static_var0='tu1 static_var0'
static static_var1='tu1 static_var1'
tu1_fn0()
{ __set_up_static_vars 'tu1'
echo "tu1"
echo "\tstatic_var0: $static_var0"
echo "\tstatic_var1: $static_var1"
}
################################################################################
# TU 2
################################################################################
main()
{
tu0_fn0
tu1_fn0
tu0_fn0
}
main "${@}"
|
