#

# Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.

#

# This code 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

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#  

#

# This file defines variables and macros which are used in the makefiles to 

# allow distributions to augment or replace common hotspot code with 

# Requires: GAMMADIR

# Provides:

#   variables: HS_COMMON_SRC, HS_ALT_SRC, HS_COMMON_SRC_REL, and HS_ALT_SRC_REL

#   functions: altsrc-equiv, if-has-altsrc, altsrc, altsrc-replace

HS_COMMON_SRC_REL=src

HS_COMMON_SRC=$(GAMMADIR)/$(HS_COMMON_SRC_REL)

HS_ALT_SRC=$(GAMMADIR)/$(HS_ALT_SRC_REL)

## altsrc-equiv 

# 

# Convert a common source path to an alternative source path

#

# Parameter: An absolute path into the common sources

# Result: The matching path to the alternate-source location

#

altsrc-equiv=$(subst $(HS_COMMON_SRC)/,$(HS_ALT_SRC)/,$(1))

## if-has-altsrc

#

# Conditional macro to test for the existence of an alternate source path

#

# Parameter: An absolute path into the common sources

# Parameter: Result if the alternative-source location exists

# Parameter: Result if the alternative-source location does not exist

# Result: expands to parameter 2 or 3 depending on existence of alternate source

#

if-has-altsrc=$(if $(wildcard $(call altsrc-equiv,$(1))),$(2),$(3))

## altsrc

#

# Converts common source path to alternate source path if the alternate 

# path exists, otherwise evaluates to nul (empty string)

# 

# Parameter: An absolute path into the common sources

# Result: The equivalent path to the alternate-source location, if such a 

#         location exists on the filesystem.  Otherwise it expands to empty.

# 

altsrc=$(call if-has-altsrc,$(1),$(call altsrc-equiv,$(1)))

## commonsrc

# 

# Returns parameter.

#

commonsrc=$(1)

## altsrc-replace

#

# Converts a common source path to an alternate source path if the alternate

# source path exists.  Otherwise it evaluates to the input common source path.

#

# Parameter: An absolute path into the common sources

# Result: A path to either the common or alternate sources

#

altsrc-replace=$(call if-has-altsrc,$(1),$(call altsrc-equiv,$(1)),$(1))