#!/bin/sh

# $Header: /home/amb/cxref/RCS/cxref-cc 1.4 2002/01/19 14:35:28 amb Exp $
#
# C Cross Referencing & Documentation tool. Version 1.5d.
#
# C compiler replacement to compile program and cross reference it.
#
# Written by Andrew M. Bishop
#
# This file Copyright 1997,98,2002 Andrew M. Bishop
# It may be distributed under the GNU Public License, version 2, or
# any higher version.  See section COPYING of the GNU Public license
# for conditions under which this file may be redistributed.
#

# Print a usage statement.

if [ $# = 0 ]; then

    echo 'Usage: cxref-cc filename [CC-arguments]' 1>&2
    echo '' 1>&2
    echo 'filename        : The name of the file to compile and cross reference.' 1>&2
    echo 'CC-arguments    : Any number of arguments to the C compiler.' 1>&2
    echo '' 1>&2
    echo 'The C compiler is called first, and if this succeeds then cxref is called.' 1>&2
    echo 'You require a .cxref file to contain the cxref options.' 1>&2
    exit 1

fi

# Check for a .cxref file.

if [ ! -r .cxref ]; then

    echo 'cxref-cc: Error a .cxref file is required to use cxref-cc.' 1>&2
    echo '          If you do not need any arguments an empty file will work.' 1>&2
    exit 1

fi

# The variables that we are going to use.

if [ "x$CXREFCC" = x ]; then
    if [ "x$CC" = x ]; then
        CXREFCC=gcc
    else
        CXREFCC=`echo $CC | cut -d' ' -f1`
        if [ `basename $CXREFCC` = cxref-cc ]; then
            echo 'cxref-cc: Warning the CC variable points to cxref-cc, set CXREFCC instead.' 1>&2
            CXREFCC=gcc
        fi
    fi
fi

CXREF=cxref

FILE=
FILESTDIN=

CXREFFLAGS=

# Call the C compiler

$CXREFCC "$@"

if [ ! $? = 0 ]; then

    echo 'cxref-cc: The C compiler failed with an error status.' 1>&2
    exit 1

fi

# Loop over the arguments and sort them out.

# Note: Need to be careful because "-DFOO=BAR BAR" loses its quotes on parameter
#       expansion, but must be passed to cxref as a single word.  We need to use
#       a word separator since there are no arrays, so we use ^M.

while [ ! $# = 0 ]; do

    case $1 in

        # The arguments to keep

        -D)
            CXREFFLAGS="$CXREFFLAGS
$1
$2"; shift;;
        -D*)
            CXREFFLAGS="$CXREFFLAGS
$1";;

        -U)
            CXREFFLAGS="$CXREFFLAGS
$1
$2"; shift;;
        -U*)
            CXREFFLAGS="$CXREFFLAGS
$1";;

        -I)
            CXREFFLAGS="$CXREFFLAGS
$1
$2"; shift;;
        -I*)
            CXREFFLAGS="$CXREFFLAGS
$1";;

        # The filename (perhaps)

        *.c)
            if [ "x$FILE" = x -a -r $1 ]; then
                FILE="
$1";
            fi;;

        -)
            FILESTDIN=yes;;

        # The arguments to throw away

        *)
            ;;

    esac
    shift

done

# Check that a real file was specified

if [ "x$FILE" = x ]; then

    if [ "x$FILESTDIN" = xyes ]; then
        echo 'cxref-cc: Cannot use stdin "-" as a filename with cxref-cc' 1>&2
    else
        echo 'cxref-cc: Warning no file specified on the command line' 1>&2
    fi
    exit 0

fi

# Call cxref

# Note: We are using ^M as the word separator, as detailed above.

IFS=
export IFS

$CXREF$FILE$CXREFFLAGS

if [ ! $? = 0 ]; then

    echo 'cxref-cc: Cxref exited with error status' 1>&2
    exit 1

fi