minix/usr.bin/genassym/genassym.sh

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#!/bin/sh -
# $NetBSD: genassym.sh,v 1.6 2009/11/28 20:30:01 dsl 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