Sync usage with man page.

[netbsd-mini2440.git] / usr.bin / genassym / genassym.sh

#!/bin/sh -
#       $NetBSD: genassym.sh,v 1.5 2009/10/18 18:14:00 snj Exp $
#
# Copyright (c) 1997 Matthias Pfaller.
# All rights reserved.
#
# 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.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
#

progname=${0}
: ${AWK:=awk}

ccode=0         # generate temporary C file, compile it, execute result
fcode=0         # generate Forth code

usage()
{

        echo "usage: ${progname} [-c | -f] -- compiler command" >&2
}

while getopts cf i
do
        case "$i" in
        c)
                ccode=1
                ;;
        f)
                fcode=1
                ;;
        esac
done
shift $(($OPTIND - 1))
if [ $# -eq 0 ]; then
        usage
        exit 1
fi

# Deal with any leading environment settings..

while [ "$1" ]
do
        case "$1" in
        *=*)
                eval export "$1"
                shift
                ;;
        *)
                break
                ;;
        esac
done

genassym_temp=/tmp/genassym.$$

if ! mkdir $genassym_temp; then
        echo "${progname}: unable to create temporary directory" >&2
        exit 1
fi
trap "rm -rf $genassym_temp" 0 1 2 3 15

$AWK '
BEGIN {
        printf("#define offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
        defining = 0;
        type = "long";
        asmtype = "n";
        asmprint = "";
}

{
        doing_member = 0;
}

$0 ~ /^[ \t]*#.*/ || $0 ~ /^[ \t]*$/ {
        # Just ignore comments and empty lines
        next;
}

$0 ~ /^config[ \t]/ {
        type = $2;
        asmtype = $3;
        asmprint = $4;
        next;
}

/^include[ \t]/ {
        if (defining != 0) {
                defining = 0;
                printf("}\n");
        }
        printf("#%s\n", $0);
        next;
}

$0 ~ /^if[ \t]/ ||
$0 ~ /^ifdef[ \t]/ ||
$0 ~ /^ifndef[ \t]/ ||
$0 ~ /^else/ ||
$0 ~ /^elif[ \t]/ ||
$0 ~ /^endif/ {
        printf("#%s\n", $0);
        next;
}

/^struct[ \t]/ {
        structname = $2;
        $0 = "define " structname "_SIZEOF sizeof(struct " structname ")";
        # fall through
}

/^member[ \t]/ {
        if (NF > 2)
                $0 = "define " $2 " offsetof(struct " structname ", " $3 ")";
        else
                $0 = "define " $2 " offsetof(struct " structname ", " $2 ")";
        doing_member = 1;
        # fall through
}

/^export[ \t]/ {
        $0 = "define " $2 " " $2;
        # fall through
}

/^define[ \t]/ {
        if (defining == 0) {
                defining = 1;
                printf("void f" FNR "(void);\n");
                printf("void f" FNR "(void) {\n");
                if (ccode)
                        call[FNR] = "f" FNR;
                defining = 1;
        }
        value = $0
        gsub("^define[ \t]+[A-Za-z_][A-Za-z_0-9]*[ \t]+", "", value)
        if (ccode)
                printf("printf(\"#define " $2 " %%ld\\n\", (%s)" value ");\n", type);
        else if (fcode) {
                if (doing_member)
                        printf("__asm(\"XYZZY : %s d# %%%s0 + ;\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
                else
                        printf("__asm(\"XYZZY d# %%%s0 constant %s\" : : \"%s\" (%s));\n", asmprint, $2, asmtype, value);
        } else
                printf("__asm(\"XYZZY %s %%%s0\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
        next;
}

/^quote[ \t]/ {
        gsub("^quote[ \t]+", "");
        print;
        next;
}

{
        printf("syntax error in line %d\n", FNR) >"/dev/stderr";
        exit(1);
}

END {
        if (defining != 0) {
                defining = 0;
                printf("}\n");
        }
        if (ccode) {
                printf("int main(int argc, char **argv) {");
                for (i in call)
                        printf(call[i] "();");
                printf("return(0); }\n");
        }
}
' ccode=$ccode fcode=$fcode > ${genassym_temp}/assym.c || exit 1

if [ $ccode = 1 ] ; then
        "$@" ${genassym_temp}/assym.c -o ${genassym_temp}/genassym && \
            ${genassym_temp}/genassym
elif [ $fcode = 1 ]; then
        # Kill all of the "#" and "$" modifiers; locore.s already
        # prepends the correct "constant" modifier.
        "$@" -S ${genassym_temp}/assym.c -o - | sed -e 's/\$//g' | \
            sed -n 's/.*XYZZY//gp'
else
        # Kill all of the "#" and "$" modifiers; locore.s already
        # prepends the correct "constant" modifier.
        "$@" -S ${genassym_temp}/assym.c -o - > \
            ${genassym_temp}/genassym.out && \
            sed -e 's/#//g' -e 's/\$//g' < ${genassym_temp}/genassym.out | \
            sed -n 's/.*XYZZY/#define/gp'
fi