1# $OpenBSD: freenull.awk,v 1.1 2018/07/10 20:53:30 tb Exp $
2# Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
3#
4# Permission to use, copy, modify, and distribute this software for any
5# purpose with or without fee is hereby granted, provided that the above
6# copyright notice and this permission notice appear in all copies.
7#
8# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15
16# usage: awk -f freenull.awk < Symbols.list > freenull.c.body
17
18# Skip this function because it calls abort(3).
19/^CRYPTO_dbg_free/ {
20	next
21}
22
23# Skip *_free functions that take more than one or no argument.
24/^ASN1_item_ex_free$/				||
25/^ASN1_item_free$/				||
26/^ASN1_primitive_free$/				||
27/^ASN1_template_free$/				||
28/^CONF_modules_free$/				||
29/^EVP_PKEY_asn1_set_free$/			||
30/^OBJ_sigid_free$/				||
31/^X509V3_section_free$/				||
32/^X509V3_string_free$/				||
33/^asn1_enc_free$/				||
34/^sk_pop_free$/ {
35	next
36}
37
38# Skip functions that are prototyped in a .c file.
39/^BIO_CONNECT_free$/				||
40/^CRYPTO_free$/					||
41/^EC_PRIVATEKEY_free$/				||
42/^ECPARAMETERS_free$/				||
43/^ECPKPARAMETERS_free$/				||
44/^NETSCAPE_ENCRYPTED_PKEY_free$/		||
45/^NETSCAPE_PKEY_free$/				||
46/^X9_62_CHARACTERISTIC_TWO_free$/		||
47/^X9_62_PENTANOMIAL_free$/ {
48	next
49}
50
51/^ENGINE_free$/ {
52	printf("#ifndef OPENSSL_NO_ENGINE\n")
53	printf("\tENGINE_free(NULL);\n")
54	printf("#endif\n")
55	next
56}
57
58/_free$/ {
59	printf("\t%s(NULL);\n", $0)
60}
61