xref: /minix/usr.bin/genassym/genassym.sh (revision 0a6a1f1d) 
1#!/bin/sh -
2#	$NetBSD: genassym.sh,v 1.8 2014/01/06 22:43:15 christos 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="$(basename "${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: ${progname} [-c | -f] -- compiler command" >&2
38}
39
40set -e
41
42while getopts cf i
43do
44	case "$i" in
45	c)
46		ccode=1
47		;;
48	f)
49		fcode=1
50		;;
51	esac
52done
53shift "$(($OPTIND - 1))"
54if [ $# -eq 0 ]; then
55	usage
56	exit 1
57fi
58
59# Deal with any leading environment settings..
60
61while [ -n "$1" ]
62do
63	case "$1" in
64	*=*)
65		eval export "$1"
66		shift
67		;;
68	*)
69		break
70		;;
71	esac
72done
73
74genassym_temp="$(mktemp -d "${TMPDIR-/tmp}/genassym.XXXXXX")"
75
76
77if [ ! -d $genassym_temp ]; then
78	echo "${progname}: unable to create temporary directory" >&2
79	exit 1
80fi
81trap "rm -rf $genassym_temp" 0 1 2 3 15
82
83$AWK '
84BEGIN {
85	printf("#if __GNUC__ >= 4\n");
86	printf("#define	offsetof(type, member) __builtin_offsetof(type, member)\n");
87	printf("#else\n");
88	printf("#define	offsetof(type, member) ((size_t)(&((type *)0)->member))\n");
89	printf("#endif\n");
90	defining = 0;
91	type = "long";
92	asmtype = "n";
93	asmprint = "";
94}
95
96{
97	doing_member = 0;
98}
99
100$0 ~ /^[ \t]*#.*/ || $0 ~ /^[ \t]*$/ {
101	# Just ignore comments and empty lines
102	next;
103}
104
105$0 ~ /^config[ \t]/ {
106	type = $2;
107	asmtype = $3;
108	asmprint = $4;
109	next;
110}
111
112/^include[ \t]/ {
113	if (defining != 0) {
114		defining = 0;
115		printf("}\n");
116	}
117	printf("#%s\n", $0);
118	next;
119}
120
121$0 ~ /^if[ \t]/ ||
122$0 ~ /^ifdef[ \t]/ ||
123$0 ~ /^ifndef[ \t]/ ||
124$0 ~ /^else/ ||
125$0 ~ /^elif[ \t]/ ||
126$0 ~ /^endif/ {
127	printf("#%s\n", $0);
128	next;
129}
130
131/^struct[ \t]/ {
132	structname = $2;
133	$0 = "define " structname "_SIZEOF sizeof(struct " structname ")";
134	# fall through
135}
136
137/^member[ \t]/ {
138	if (NF > 2)
139		$0 = "define " $2 " offsetof(struct " structname ", " $3 ")";
140	else
141		$0 = "define " $2 " offsetof(struct " structname ", " $2 ")";
142	doing_member = 1;
143	# fall through
144}
145
146/^export[ \t]/ {
147	$0 = "define " $2 " " $2;
148	# fall through
149}
150
151/^define[ \t]/ {
152	if (defining == 0) {
153		defining = 1;
154		printf("void f" FNR "(void);\n");
155		printf("void f" FNR "(void) {\n");
156		if (ccode)
157			call[FNR] = "f" FNR;
158		defining = 1;
159	}
160	value = $0
161	gsub("^define[ \t]+[A-Za-z_][A-Za-z_0-9]*[ \t]+", "", value)
162	if (ccode)
163		printf("printf(\"#define " $2 " %%ld\\n\", (%s)" value ");\n", type);
164	else if (fcode) {
165		if (doing_member)
166			printf("__asm(\"XYZZY : %s d# %%%s0 + ;\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
167		else
168			printf("__asm(\"XYZZY d# %%%s0 constant %s\" : : \"%s\" (%s));\n", asmprint, $2, asmtype, value);
169	} else
170		printf("__asm(\"XYZZY %s %%%s0\" : : \"%s\" (%s));\n", $2, asmprint, asmtype, value);
171	next;
172}
173
174/^quote[ \t]/ {
175	gsub("^quote[ \t]+", "");
176	print;
177	next;
178}
179
180{
181	printf("syntax error in line %d\n", FNR) >"/dev/stderr";
182	exit(1);
183}
184
185END {
186	if (defining != 0) {
187		defining = 0;
188		printf("}\n");
189	}
190	if (ccode) {
191		printf("int main(int argc, char **argv) {");
192		for (i in call)
193			printf(call[i] "();");
194		printf("return(0); }\n");
195	}
196}
197' ccode="$ccode" fcode="$fcode" > "${genassym_temp}/assym.c" || exit 1
198
199if [ "$ccode" = 1 ]; then
200	"$@" "${genassym_temp}/assym.c" -o "${genassym_temp}/genassym" && \
201	    "${genassym_temp}/genassym"
202elif [ "$fcode" = 1 ]; then
203	# Kill all of the "#" and "$" modifiers; locore.s already
204	# prepends the correct "constant" modifier.
205	"$@" -S "${genassym_temp}/assym.c" -o - | sed -e 's/\$//g' | \
206	    sed -n 's/.*XYZZY//gp'
207else
208	# Kill all of the "#" and "$" modifiers; locore.s already
209	# prepends the correct "constant" modifier.
210	"$@" -S "${genassym_temp}/assym.c" -o - > \
211	    "${genassym_temp}/genassym.out" && \
212	    sed -e 's/#//g' -e 's/\$//g' < "${genassym_temp}/genassym.out" | \
213	    sed -n 's/.*XYZZY/#define/gp'
214fi
215