xref: /netbsd/usr.bin/genassym/genassym.sh (revision 6550d01e) 
1#!/bin/sh -
2#	$NetBSD: genassym.sh,v 1.6 2009/11/28 20:30:01 dsl Exp $
3#
4# Copyright (c) 1997 Matthias Pfaller.
5# All rights reserved.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27
28progname=${0}
29: ${AWK:=awk}
30
31ccode=0		# generate temporary C file, compile it, execute result
32fcode=0		# generate Forth code
33
34usage()
35{
36
37	echo "usage: ${progname} [-c | -f] -- compiler command" >&2
38}
39
40while getopts cf i
41do
42	case "$i" in
43	c)
44		ccode=1
45		;;
46	f)
47		fcode=1
48		;;
49	esac
50done
51shift $(($OPTIND - 1))
52if [ $# -eq 0 ]; then
53	usage
54	exit 1
55fi
56
57# Deal with any leading environment settings..
58
59while [ "$1" ]
60do
61	case "$1" in
62	*=*)
63		eval export "$1"
64		shift
65		;;
66	*)
67		break
68		;;
69	esac
70done
71
72genassym_temp=/tmp/genassym.$$
73
74if ! mkdir $genassym_temp; then
75	echo "${progname}: unable to create temporary directory" >&2
76	exit 1
77fi
78trap "rm -rf $genassym_temp" 0 1 2 3 15
79
80$AWK '
81BEGIN {
82	printf("#define	offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
83	defining = 0;
84	type = "long";
85	asmtype = "n";
86	asmprint = "";
87}
88
89{
90	doing_member = 0;
91}
92
93$0 ~ /^[ \t]*#.*/ || $0 ~ /^[ \t]*$/ {
94	# Just ignore comments and empty lines
95	next;
96}
97
98$0 ~ /^config[ \t]/ {
99	type = $2;
100	asmtype = $3;
101	asmprint = $4;
102	next;
103}
104
105/^include[ \t]/ {
106	if (defining != 0) {
107		defining = 0;
108		printf("}\n");
109	}
110	printf("#%s\n", $0);
111	next;
112}
113
114$0 ~ /^if[ \t]/ ||
115$0 ~ /^ifdef[ \t]/ ||
116$0 ~ /^ifndef[ \t]/ ||
117$0 ~ /^else/ ||
118$0 ~ /^elif[ \t]/ ||
119$0 ~ /^endif/ {
120	printf("#%s\n", $0);
121	next;
122}
123
124/^struct[ \t]/ {
125	structname = $2;
126	$0 = "define " structname "_SIZEOF sizeof(struct " structname ")";
127	# fall through
128}
129
130/^member[ \t]/ {
131	if (NF > 2)
132		$0 = "define " $2 " offsetof(struct " structname ", " $3 ")";
133	else
134		$0 = "define " $2 " offsetof(struct " structname ", " $2 ")";
135	doing_member = 1;
136	# fall through
137}
138
139/^export[ \t]/ {
140	$0 = "define " $2 " " $2;
141	# fall through
142}
143
144/^define[ \t]/ {
145	if (defining == 0) {
146		defining = 1;
147		printf("void f" FNR "(void);\n");
148		printf("void f" FNR "(void) {\n");
149		if (ccode)
150			call[FNR] = "f" FNR;
151		defining = 1;
152	}
153	value = $0
154	gsub("^define[ \t]+[A-Za-z_][A-Za-z_0-9]*[ \t]+", "", value)
155	if (ccode)
156		printf("printf(\"#define " $2 " %%ld\\n\", (%s)" value ");\n", type);
157	else if (fcode) {
158		if (doing_member)
159			printf("__asm(\"XYZZY : %s d# %%%s0 + ;\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
160		else
161			printf("__asm(\"XYZZY d# %%%s0 constant %s\" : : \"%s\" (%s));\n", asmprint, $2, asmtype, value);
162	} else
163		printf("__asm(\"XYZZY %s %%%s0\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
164	next;
165}
166
167/^quote[ \t]/ {
168	gsub("^quote[ \t]+", "");
169	print;
170	next;
171}
172
173{
174	printf("syntax error in line %d\n", FNR) >"/dev/stderr";
175	exit(1);
176}
177
178END {
179	if (defining != 0) {
180		defining = 0;
181		printf("}\n");
182	}
183	if (ccode) {
184		printf("int main(int argc, char **argv) {");
185		for (i in call)
186			printf(call[i] "();");
187		printf("return(0); }\n");
188	}
189}
190' ccode=$ccode fcode=$fcode > ${genassym_temp}/assym.c || exit 1
191
192if [ $ccode = 1 ] ; then
193	"$@" ${genassym_temp}/assym.c -o ${genassym_temp}/genassym && \
194	    ${genassym_temp}/genassym
195elif [ $fcode = 1 ]; then
196	# Kill all of the "#" and "$" modifiers; locore.s already
197	# prepends the correct "constant" modifier.
198	"$@" -S ${genassym_temp}/assym.c -o - | sed -e 's/\$//g' | \
199	    sed -n 's/.*XYZZY//gp'
200else
201	# Kill all of the "#" and "$" modifiers; locore.s already
202	# prepends the correct "constant" modifier.
203	"$@" -S ${genassym_temp}/assym.c -o - > \
204	    ${genassym_temp}/genassym.out && \
205	    sed -e 's/#//g' -e 's/\$//g' < ${genassym_temp}/genassym.out | \
206	    sed -n 's/.*XYZZY/#define/gp'
207fi
208