mirror of
https://github.com/bulletphysics/bullet3
synced 2024-12-17 06:51:05 +00:00
59 lines
2.0 KiB
Plaintext
59 lines
2.0 KiB
Plaintext
#==============================================================================
|
|
# Generic property-bag mechanism.
|
|
# Copyright (C) 2004 by Eric Sunshine <sunshine@sunshineco.com>
|
|
#
|
|
# This library is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU Library General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or (at your
|
|
# option) any later version.
|
|
#
|
|
# This library 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 Library General Public
|
|
# License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Library General Public License
|
|
# along with this library; if not, write to the Free Software Foundation,
|
|
# Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
#
|
|
#==============================================================================
|
|
|
|
# Property bag : name
|
|
# Returns the value of property 'name' in container 'bag' if present, else
|
|
# returns a null value. 'bag' and 'name' should be simple identifiers
|
|
# composed of alphanumeric characters and underscore, and with an alphabetic
|
|
# or an underscore as the first character.
|
|
rule Property
|
|
{
|
|
local p = [ _PropertyName $(<) : $(>) ] ;
|
|
return $($(p)) ;
|
|
}
|
|
|
|
# SetProperty bag : name [ : value ]
|
|
# Add property 'name' to container 'bag'. If 'value' is not provided, sets
|
|
# the property to "true".
|
|
rule SetProperty
|
|
{
|
|
local p = [ _PropertyName $(<) : $(>) ] ;
|
|
local v = $(3) ;
|
|
if ! $(v) { v = "true" ; }
|
|
$(p) = $(v) ;
|
|
}
|
|
|
|
# ClearProperty bag : name
|
|
# Remove property 'name' from container 'bag'.
|
|
rule ClearProperty
|
|
{
|
|
local p = [ _PropertyName $(<) : $(>) ] ;
|
|
$(p) = "" ;
|
|
}
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# Private utilitiy rules.
|
|
#------------------------------------------------------------------------------
|
|
rule _PropertyName
|
|
{
|
|
return "__property_$(<)_$(>)" ;
|
|
}
|