#!/bin/bash
# tools/define.sh
#
#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
#   Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with the
#    distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
#    used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#

#
# Handle command line options
#

progname=$0
wintool=n
usage="USAGE: $progname [-w] [-d] [-l] [-h] <compiler-path> <def1>[=val1] [<def2>[=val2] [<def3>[=val3] ...]]"
advice="Try '$progname -h' for more information"

while [ ! -z "$1" ]; do 
	case $1 in
	-d )
		set -x
		;;
	-w )
		wintool=y
		;;
	-h )
		echo "$progname is a tool for flexible generation of command line pre-processor"
		echo "definitions arguments for a variety of diffent compilers in a variety of"
		echo "compilation environments"
		echo ""
		echo $usage
		echo ""
		echo "Where:"
		echo "	<compiler-path>"
		echo "		The full path to your compiler"
		echo "	<def1> <def2> [<def3> ..."
		echo "		A list of pre-preprocesser variable names to be defind."
		echo "	[=val1] [=val2] [=val3]"
		echo "		optional values to be assigned to each pre-processor variable."
		echo "		If not supplied, the variable will be defined with no explicit value."
		echo "	-w"
		echo "		The compiler is a Windows native tool and requires Windows"
		echo "		style pathnames like C:\\Program Files"
		echo "	-d"
		echo "		Enable script debug"
		;;
	* )
		break;
		;;
	esac
	shift
done

ccpath=$1
shift
varlist=$@

if [ -z "$ccpath" ]; then
	echo "Missing compiler path"
	echo $usage
	echo $advice
	exit 1
fi

if [ -z "$varlist" ]; then
	echo "Missing definition list"
	echo $usage
	echo $advice
	exit 1
fi

#
# Most compilers support CFLAG options like '-D<defn>' to add pre-processor
# variable defintions.  Some (like the Zilog tools), do not.  This script
# makes the selection of pre-processor definitions compiler independent.
#
# Below are all known compiler names (as found in the config/*/*/Make.defs
# files).  If a new compiler is used that has some unusual syntax, then
# additional logic needs to be added to this file.
#
#   NAME                        Syntax
#   $(CROSSDEV)gcc              -D<def1> -D<def2> -D<def3> ...
#   sdcc                        -D<def2> -D<def2> -D<def3> ...
#   $(ZDSBINDIR)/ez8cc.exe      -define:<def1> -define:<def2> -define:<def3> ...
#   $(ZDSBINDIR)/zneocc.exe     -define:<def1> -define:<def2> -define:<def3> ...
#   $(ZDSBINDIR)/ez80cc.exe     -define:<def1> -define:<def2> -define:<def3> ...
#
os=`uname -o 2>/dev/null || echo "Other"`

#
# Let's assume that all GCC compiler paths contain the string gcc and
# no non-GCC compiler pathes include this substring
#
gcc=`echo $ccpath | grep gcc`
sdcc=`echo $ccpath | grep sdcc`

if [ "X$os" = "XCygwin" ]; then
	#
	# We can treat Cygwin native toolchains just like Linux native
	# toolchains in the Linux.  Let's assume:
	# 1. GCC or SDCC are the only possible Cygwin native compilers
	# 2. If this is a Window native GCC version, then -w provided
	#    on the command line (wintool=y)

	if [ -z "$gcc" -a -z "$sdcc" ]; then
		#
		# Not GCC or SDCC, must be Windows native
		#
		compiler=`cygpath -u "$ccpath"`
	else
		if [ "X$wintool" == "Xy" ]; then
			#
			# It is a native GCC or SDCC compiler
			#
			compiler=`cygpath -u "$ccpath"`
		else
			#
			# GCC or SDCC and not for Windows
			#
			compiler="$ccpath"
		fi
	fi
else
	#
	# Otherwise, we must be in a Linux environment where there are
	# only Linux native toolchains
	#
	compiler="$ccpath"
fi
exefile=`basename "$compiler"`

# Check for some well known, non-GCC Windows native tools that require
# a special output format as well as special paths

if [ "X$exefile" = "Xez8cc.exe" -o "X$exefile" = "Xzneocc.exe" -o "X$exefile" = "Xez80cc.exe" ]; then
	fmt=define
else
	fmt=std
fi

# Now process each directory in the directory list

unset response
for vardef in $varlist; do

	varname=`echo $vardef | cut -d'=' -f1`
	varvalue=`echo $vardef | cut -d'=' -f2`

    # Handle the output depending on if there is a value for the variable or not

	if [ -z "$varvalue" ]; then

		# Handle the output using the selected format

		if [ "X$fmt" = "Xdefine" ]; then
			# Treat the first definition differently

			if [ -z "$response" ]; then
				response="-define:"$varname
			else
				response=$response" -define:$varname"
			fi
		else
			# Treat the first definition differently

			if [ -z "$response" ]; then
				response=-D$varname
			else
				response=$response" -D$varname"
			fi
		fi
	else

		# Handle the output using the selected format

		if [ "X$fmt" = "Xdefine" ]; then
			# Treat the first definition differently

			if [ -z "$response" ]; then
				response="-define:"$varname=$varvalue
			else
				response=$response" -define:$varname=$varvalue"
			fi
		else
			# Treat the first definition differently

			if [ -z "$response" ]; then
				response=-D$varname=$varvalue
			else
				response=$response" -D$varname=$varvalue"
			fi
		fi
	fi
done

echo $response