X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=util%2Fmkdef.pl;h=3ae0a9070313522068075b5bb8aa1144629a05d9;hp=b6fc9791599917f1e1efba96bc12d7a665b0cb06;hb=a283d2a80adfaa88573bcd9acd3d8d7ab55c1af4;hpb=f3dea9a5958b576345bae710c0acd2e52ecde0c8

diff --git a/util/mkdef.pl b/util/mkdef.pl
index b6fc979159..3ae0a90703 100755
--- a/util/mkdef.pl
+++ b/util/mkdef.pl
@@ -69,23 +69,25 @@ my $do_ctestall = 0;
 my $do_checkexist = 0;
 
 my $VMSVAX=0;
-my $VMSAlpha=0;
+my $VMSNonVAX=0;
 my $VMS=0;
 my $W32=0;
-my $W16=0;
 my $NT=0;
 my $OS2=0;
 # Set this to make typesafe STACK definitions appear in DEF
 my $safe_stack_def = 0;
 
-my @known_platforms = ( "__FreeBSD__", "PERL5", "NeXT",
-			"EXPORT_VAR_AS_FUNCTION" );
-my @known_ossl_platforms = ( "VMS", "WIN16", "WIN32", "WINNT", "OS2" );
+my @known_platforms = ( "__FreeBSD__", "PERL5",
+			"EXPORT_VAR_AS_FUNCTION", "ZLIB",
+			"OPENSSL_FIPS", "OPENSSL_FIPSCAPABLE" );
+my @known_ossl_platforms = ( "VMS", "WIN32", "WINNT", "OS2" );
 my @known_algorithms = ( "RC2", "RC4", "RC5", "IDEA", "DES", "BF",
 			 "CAST", "MD2", "MD4", "MD5", "SHA", "SHA0", "SHA1",
-			 "SHA256", "SHA512", "RIPEMD",
-			 "MDC2", "RSA", "DSA", "DH", "EC", "ECDH", "ECDSA",
-			 "HMAC", "AES", "WHIRLPOOL", "CAMELLIA",
+			 "SHA256", "SHA512", "RMD160",
+			 "MDC2", "WHIRLPOOL", "RSA", "DSA", "DH", "EC", "ECDH", "ECDSA", "EC2M",
+			 "HMAC", "AES", "CAMELLIA", "SEED", "GOST",
+			 # EC_NISTP_64_GCC_128
+			 "EC_NISTP_64_GCC_128",
 			 # Envelope "algorithms"
 			 "EVP", "X509", "ASN1_TYPEDEFS",
 			 # Helper "algorithms"
@@ -96,9 +98,29 @@ my @known_algorithms = ( "RC2", "RC4", "RC5", "IDEA", "DES", "BF",
 			 # Engines
 			 "STATIC_ENGINE", "ENGINE", "HW", "GMP",
 			 # TLS
-			 "TLSEXT", "PSK",
+			 "TLSEXT", "PSK", "SRP", "HEARTBEATS",
+			 # CMS
+			 "CMS",
+			 # CryptoAPI Engine
+			 "CAPIENG",
+			 # SSL v3 method
+			 "SSL3_METHOD",
+			 # JPAKE
+			 "JPAKE",
+			 # NEXTPROTONEG
+			 "NEXTPROTONEG",
 			 # Deprecated functions
-			 "DEPRECATED" );
+			 "DEPRECATED",
+			 # SCTP
+		 	 "SCTP",
+			 # SRTP
+			 "SRTP",
+			 # SSL TRACE
+		 	 "SSL_TRACE",
+			 # Unit testing
+		 	 "UNIT_TEST",
+			 # OCB mode
+			 "OCB");
 
 my $options="";
 open(IN,"<Makefile") || die "unable to open Makefile!\n";
@@ -111,19 +133,26 @@ close(IN);
 # defined with ifndef(NO_XXX) are not included in the .def file, and everything
 # in directory xxx is ignored.
 my $no_rc2; my $no_rc4; my $no_rc5; my $no_idea; my $no_des; my $no_bf;
-my $no_cast; my $no_whirlpool; my $no_camellia;
+my $no_cast; my $no_whirlpool; my $no_camellia; my $no_seed;
 my $no_md2; my $no_md4; my $no_md5; my $no_sha; my $no_ripemd; my $no_mdc2;
-my $no_rsa; my $no_dsa; my $no_dh; my $no_hmac=0; my $no_aes; my $no_krb5;
+my $no_rsa; my $no_dsa; my $no_dh; my $no_aes; my $no_krb5;
 my $no_ec; my $no_ecdsa; my $no_ecdh; my $no_engine; my $no_hw;
 my $no_fp_api; my $no_static_engine=1; my $no_gmp; my $no_deprecated;
-my $no_psk; my $no_tlsext;
+my $no_psk; my $no_tlsext; my $no_cms; my $no_capieng;
+my $no_jpake; my $no_srp; my $no_ec2m; my $no_nistp_gcc; 
+my $no_nextprotoneg; my $no_sctp; my $no_srtp; my $no_ssl_trace;
+my $no_unit_test; my $no_ssl3_method; my $no_ocb;
+
+my $fips;
+
+my $zlib;
 
 
 foreach (@ARGV, split(/ /, $options))
 	{
 	$debug=1 if $_ eq "debug";
 	$W32=1 if $_ eq "32";
-	$W16=1 if $_ eq "16";
+	die "win16 not supported" if $_ eq "16";
 	if($_ eq "NT") {
 		$W32 = 1;
 		$NT = 1;
@@ -132,12 +161,17 @@ foreach (@ARGV, split(/ /, $options))
 		$VMS=1;
 		$VMSVAX=1;
 	}
-	if ($_ eq "VMS-Alpha") {
+	if ($_ eq "VMS-NonVAX") {
 		$VMS=1;
-		$VMSAlpha=1;
+		$VMSNonVAX=1;
 	}
 	$VMS=1 if $_ eq "VMS";
 	$OS2=1 if $_ eq "OS2";
+	$fips=1 if /^fips/;
+	if ($_ eq "zlib" || $_ eq "enable-zlib" || $_ eq "zlib-dynamic"
+			 || $_ eq "enable-zlib-dynamic") {
+		$zlib = 1;
+	}
 
 	$do_ssl=1 if $_ eq "ssleay";
 	if ($_ eq "ssl") {
@@ -178,9 +212,9 @@ foreach (@ARGV, split(/ /, $options))
 	elsif (/^no-ec$/)       { $no_ec=1; }
 	elsif (/^no-ecdsa$/)	{ $no_ecdsa=1; }
 	elsif (/^no-ecdh$/) 	{ $no_ecdh=1; }
-	elsif (/^no-hmac$/)	{ $no_hmac=1; }
 	elsif (/^no-aes$/)	{ $no_aes=1; }
 	elsif (/^no-camellia$/)	{ $no_camellia=1; }
+	elsif (/^no-seed$/)     { $no_seed=1; }
 	elsif (/^no-evp$/)	{ $no_evp=1; }
 	elsif (/^no-lhash$/)	{ $no_lhash=1; }
 	elsif (/^no-stack$/)	{ $no_stack=1; }
@@ -194,6 +228,21 @@ foreach (@ARGV, split(/ /, $options))
 	elsif (/^no-engine$/)	{ $no_engine=1; }
 	elsif (/^no-hw$/)	{ $no_hw=1; }
 	elsif (/^no-gmp$/)	{ $no_gmp=1; }
+	elsif (/^no-tlsext$/)	{ $no_tlsext=1; }
+	elsif (/^no-cms$/)	{ $no_cms=1; }
+	elsif (/^no-ec2m$/)	{ $no_ec2m=1; }
+ 	elsif (/^no-ec-nistp224-64-gcc-128$/)	{ $no_nistp_gcc=1; }
+	elsif (/^no-nextprotoneg$/)	{ $no_nextprotoneg=1; }
+	elsif (/^no-ssl3-method$/) { $no_ssl3_method=1; }
+	elsif (/^no-ssl-trace$/) { $no_ssl_trace=1; }
+	elsif (/^no-capieng$/)	{ $no_capieng=1; }
+	elsif (/^no-jpake$/)	{ $no_jpake=1; }
+	elsif (/^no-srp$/)	{ $no_srp=1; }
+	elsif (/^no-sctp$/)	{ $no_sctp=1; }
+	elsif (/^no-srtp$/)	{ $no_srtp=1; }
+	elsif (/^no-unit-test$/){ $no_unit_test=1; }
+	elsif (/^no-deprecated$/) { $no_deprecated=1; }
+	elsif (/^no-ocb/){ $no_ocb=1; }
 	}
 
 
@@ -207,15 +256,10 @@ if (!$libname) {
 }
 
 # If no platform is given, assume WIN32
-if ($W32 + $W16 + $VMS + $OS2 == 0) {
+if ($W32 + $VMS + $OS2 == 0) {
 	$W32 = 1;
 }
 
-# Add extra knowledge
-if ($W16) {
-	$no_fp_api=1;
-}
-
 if (!$do_ssl && !$do_crypto)
 	{
 	print STDERR "usage: $0 ( ssl | crypto ) [ 16 | 32 | NT | OS2 ]\n";
@@ -230,10 +274,13 @@ $max_crypto = $max_num;
 my $ssl="ssl/ssl.h";
 $ssl.=" ssl/kssl.h";
 $ssl.=" ssl/tls1.h";
+$ssl.=" ssl/srtp.h";
 
 my $crypto ="crypto/crypto.h";
+$crypto.=" crypto/cryptlib.h";
 $crypto.=" crypto/o_dir.h";
-$crypto.=" crypto/des/des.h crypto/des/des_old.h" ; # unless $no_des;
+$crypto.=" crypto/o_str.h";
+$crypto.=" crypto/des/des.h" ; # unless $no_des;
 $crypto.=" crypto/idea/idea.h" ; # unless $no_idea;
 $crypto.=" crypto/rc4/rc4.h" ; # unless $no_rc4;
 $crypto.=" crypto/rc5/rc5.h" ; # unless $no_rc5;
@@ -249,6 +296,7 @@ $crypto.=" crypto/sha/sha.h" ; # unless $no_sha;
 $crypto.=" crypto/ripemd/ripemd.h" ; # unless $no_ripemd;
 $crypto.=" crypto/aes/aes.h" ; # unless $no_aes;
 $crypto.=" crypto/camellia/camellia.h" ; # unless $no_camellia;
+$crypto.=" crypto/seed/seed.h"; # unless $no_seed;
 
 $crypto.=" crypto/bn/bn.h";
 $crypto.=" crypto/rsa/rsa.h" ; # unless $no_rsa;
@@ -258,6 +306,7 @@ $crypto.=" crypto/ec/ec.h" ; # unless $no_ec;
 $crypto.=" crypto/ecdsa/ecdsa.h" ; # unless $no_ecdsa;
 $crypto.=" crypto/ecdh/ecdh.h" ; # unless $no_ecdh;
 $crypto.=" crypto/hmac/hmac.h" ; # unless $no_hmac;
+$crypto.=" crypto/cmac/cmac.h" ;
 
 $crypto.=" crypto/engine/engine.h"; # unless $no_engine;
 $crypto.=" crypto/stack/stack.h" ; # unless $no_stack;
@@ -287,8 +336,12 @@ $crypto.=" crypto/comp/comp.h" ; # unless $no_comp;
 $crypto.=" crypto/ocsp/ocsp.h";
 $crypto.=" crypto/ui/ui.h crypto/ui/ui_compat.h";
 $crypto.=" crypto/krb5/krb5_asn.h";
-$crypto.=" crypto/store/store.h";
+#$crypto.=" crypto/store/store.h";
 $crypto.=" crypto/pqueue/pqueue.h";
+$crypto.=" crypto/cms/cms.h";
+$crypto.=" crypto/jpake/jpake.h";
+$crypto.=" crypto/srp/srp.h";
+$crypto.=" crypto/modes/modes.h";
 
 my $symhacks="crypto/symhacks.h";
 
@@ -372,6 +425,7 @@ sub do_defs
 				# is the same name as the original.
 	my $cpp;
 	my %unknown_algorithms = ();
+	my $parens = 0;
 
 	foreach $file (split(/\s+/,$symhacksfile." ".$files))
 		{
@@ -382,6 +436,7 @@ sub do_defs
 			(map { $_ => 0 } @known_platforms),
 			(map { "OPENSSL_SYS_".$_ => 0 } @known_ossl_platforms),
 			(map { "OPENSSL_NO_".$_ => 0 } @known_algorithms),
+			(map { "OPENSSL_USE_".$_ => 0 } @known_algorithms),
 			NOPROTO		=> 0,
 			PERL5		=> 0,
 			_WINDLL		=> 0,
@@ -444,6 +499,11 @@ sub do_defs
 
 		print STDERR "DEBUG: parsing ----------\n" if $debug;
 		while(<IN>) {
+			if($parens > 0) {
+				#Inside a DECLARE_DEPRECATED
+				$parens += count_parens($_);
+				next;
+			}
 			if (/\/\* Error codes for the \w+ functions\. \*\//)
 				{
 				undef @tag;
@@ -547,6 +607,8 @@ sub do_defs
 					pop(@tag);
 					if ($t =~ /^OPENSSL_NO_([A-Z0-9_]+)$/) {
 						$t=$1;
+					} elsif($t =~ /^OPENSSL_USE_([A-Z0-9_]+)$/) {
+						$t=$1;
 					} else {
 						$t="";
 					}
@@ -596,10 +658,15 @@ sub do_defs
 					   map { $tag{"OPENSSL_SYS_".$_} == 1 ? $_ :
 						     $tag{"OPENSSL_SYS_".$_} == -1 ? "!".$_  : "" }
 					   @known_ossl_platforms);
+				@current_algorithms = ();
 				@current_algorithms =
 				    grep(!/^$/,
 					 map { $tag{"OPENSSL_NO_".$_} == -1 ? $_ : "" }
 					 @known_algorithms);
+				push @current_algorithms
+				    , grep(!/^$/,
+					 map { $tag{"OPENSSL_USE_".$_} == 1 ? $_ : "" }
+					 @known_algorithms);
 				$def .=
 				    "#INFO:"
 					.join(',',@current_platforms).":"
@@ -765,10 +832,9 @@ sub do_defs
 				} elsif (/^DECLARE_PEM_rw\s*\(\s*(\w*)\s*,/ ||
 					 /^DECLARE_PEM_rw_cb\s*\(\s*(\w*)\s*,/ ||
 					 /^DECLARE_PEM_rw_const\s*\(\s*(\w*)\s*,/ ) {
-					# Things not in Win16
 					$def .=
 					    "#INFO:"
-						.join(',',"!WIN16",@current_platforms).":"
+						.join(',',@current_platforms).":"
 						    .join(',',@current_algorithms).";";
 					$def .= "int PEM_read_$1(void);";
 					$def .= "int PEM_write_$1(void);";
@@ -781,11 +847,11 @@ sub do_defs
 					$def .= "int PEM_write_bio_$1(void);";
 					next;
 				} elsif (/^DECLARE_PEM_write\s*\(\s*(\w*)\s*,/ ||
+					/^DECLARE_PEM_write_const\s*\(\s*(\w*)\s*,/ ||
 					 /^DECLARE_PEM_write_cb\s*\(\s*(\w*)\s*,/ ) {
-					# Things not in Win16
 					$def .=
 					    "#INFO:"
-						.join(',',"!WIN16",@current_platforms).":"
+						.join(',',@current_platforms).":"
 						    .join(',',@current_algorithms).";";
 					$def .= "int PEM_write_$1(void);";
 					$def .=
@@ -797,10 +863,9 @@ sub do_defs
 					next;
 				} elsif (/^DECLARE_PEM_read\s*\(\s*(\w*)\s*,/ ||
 					 /^DECLARE_PEM_read_cb\s*\(\s*(\w*)\s*,/ ) {
-					# Things not in Win16
 					$def .=
 					    "#INFO:"
-						.join(',',"!WIN16",@current_platforms).":"
+						.join(',',@current_platforms).":"
 						    .join(',',@current_algorithms).";";
 					$def .= "int PEM_read_$1(void);";
 					$def .=
@@ -829,6 +894,10 @@ sub do_defs
 					&$make_variant("_shadow_$2","_shadow_$2",
 						      "EXPORT_VAR_AS_FUNCTION",
 						      "FUNCTION");
+				} elsif (/^\s*DECLARE_DEPRECATED\s*\(\s*(\w*(\s|\*|\w)*)/) {
+					$def .= "$1(void);";
+					$parens = count_parens($_);
+					next;
 				} elsif ($tag{'CONST_STRICT'} != 1) {
 					if (/\{|\/\*|\([^\)]*$/) {
 						$line = $_;
@@ -862,6 +931,7 @@ sub do_defs
 			s/\{\}/\(\)/gs;
 
 			s/STACK_OF\(\)/void/gs;
+			s/LHASH_OF\(\)/void/gs;
 
 			print STDERR "DEBUG: \$_ = \"$_\"\n" if $debug;
 			if (/^\#INFO:([^:]*):(.*)$/) {
@@ -901,8 +971,7 @@ sub do_defs
 			$a .= ",RC2" if($s =~ /EVP_rc2/);
 			$a .= ",RC4" if($s =~ /EVP_rc4/);
 			$a .= ",RC5" if($s =~ /EVP_rc5/);
-			$a .= ",RIPEMD" if($s =~ /EVP_ripemd/);
-			$a .= ",SHA" if($s =~ /EVP_sha/);
+			$a .= ",RMD160" if($s =~ /EVP_ripemd/);
 			$a .= ",RSA" if($s =~ /EVP_(Open|Seal)(Final|Init)/);
 			$a .= ",RSA" if($s =~ /PEM_Seal(Final|Init|Update)/);
 			$a .= ",RSA" if($s =~ /RSAPrivateKey/);
@@ -932,12 +1001,25 @@ sub do_defs
 	# Prune the returned symbols
 
         delete $syms{"bn_dump1"};
-	$platform{"BIO_s_log"} .= ",!WIN32,!WIN16,!macintosh";
+	$platform{"BIO_s_log"} .= ",!WIN32,!macintosh";
 
 	$platform{"PEM_read_NS_CERT_SEQ"} = "VMS";
 	$platform{"PEM_write_NS_CERT_SEQ"} = "VMS";
 	$platform{"PEM_read_P8_PRIV_KEY_INFO"} = "VMS";
 	$platform{"PEM_write_P8_PRIV_KEY_INFO"} = "VMS";
+	$platform{"EVP_sha384"} = "!VMSVAX";
+	$platform{"EVP_sha512"} = "!VMSVAX";
+	$platform{"SHA384_Init"} = "!VMSVAX";
+	$platform{"SHA384_Transform"} = "!VMSVAX";
+	$platform{"SHA384_Update"} = "!VMSVAX";
+	$platform{"SHA384_Final"} = "!VMSVAX";
+	$platform{"SHA384"} = "!VMSVAX";
+	$platform{"SHA512_Init"} = "!VMSVAX";
+	$platform{"SHA512_Transform"} = "!VMSVAX";
+	$platform{"SHA512_Update"} = "!VMSVAX";
+	$platform{"SHA512_Final"} = "!VMSVAX";
+	$platform{"SHA512"} = "!VMSVAX";
+
 
 	# Info we know about
 
@@ -1062,18 +1144,26 @@ sub is_valid
 
 		if ($platforms) {
 			# platforms
+			if ($keyword eq "VMSVAX" && $VMSVAX) { return 1; }
+			if ($keyword eq "VMSNonVAX" && $VMSNonVAX) { return 1; }
 			if ($keyword eq "VMS" && $VMS) { return 1; }
 			if ($keyword eq "WIN32" && $W32) { return 1; }
-			if ($keyword eq "WIN16" && $W16) { return 1; }
 			if ($keyword eq "WINNT" && $NT) { return 1; }
 			if ($keyword eq "OS2" && $OS2) { return 1; }
 			# Special platforms:
 			# EXPORT_VAR_AS_FUNCTION means that global variables
 			# will be represented as functions.  This currently
 			# only happens on VMS-VAX.
-			if ($keyword eq "EXPORT_VAR_AS_FUNCTION" && ($VMSVAX || $W32 || $W16)) {
+			if ($keyword eq "EXPORT_VAR_AS_FUNCTION" && ($VMSVAX || $W32)) {
 				return 1;
 			}
+			if ($keyword eq "OPENSSL_FIPSCAPABLE") {
+				return 0;
+			}
+			if ($keyword eq "OPENSSL_FIPS" && $fips) {
+				return 1;
+			}
+			if ($keyword eq "ZLIB" && $zlib) { return 1; }
 			return 0;
 		} else {
 			# algorithms
@@ -1088,7 +1178,7 @@ sub is_valid
 			if ($keyword eq "MD4" && $no_md4) { return 0; }
 			if ($keyword eq "MD5" && $no_md5) { return 0; }
 			if ($keyword eq "SHA" && $no_sha) { return 0; }
-			if ($keyword eq "RIPEMD" && $no_ripemd) { return 0; }
+			if ($keyword eq "RMD160" && $no_ripemd) { return 0; }
 			if ($keyword eq "MDC2" && $no_mdc2) { return 0; }
 			if ($keyword eq "WHIRLPOOL" && $no_whirlpool) { return 0; }
 			if ($keyword eq "RSA" && $no_rsa) { return 0; }
@@ -1097,9 +1187,9 @@ sub is_valid
 			if ($keyword eq "EC" && $no_ec) { return 0; }
 			if ($keyword eq "ECDSA" && $no_ecdsa) { return 0; }
 			if ($keyword eq "ECDH" && $no_ecdh) { return 0; }
-			if ($keyword eq "HMAC" && $no_hmac) { return 0; }
 			if ($keyword eq "AES" && $no_aes) { return 0; }
 			if ($keyword eq "CAMELLIA" && $no_camellia) { return 0; }
+			if ($keyword eq "SEED" && $no_seed) { return 0; }
 			if ($keyword eq "EVP" && $no_evp) { return 0; }
 			if ($keyword eq "LHASH" && $no_lhash) { return 0; }
 			if ($keyword eq "STACK" && $no_stack) { return 0; }
@@ -1116,7 +1206,21 @@ sub is_valid
 			if ($keyword eq "GMP" && $no_gmp) { return 0; }
 			if ($keyword eq "TLSEXT" && $no_tlsext) { return 0; }
 			if ($keyword eq "PSK" && $no_psk) { return 0; }
+			if ($keyword eq "CMS" && $no_cms) { return 0; }
+			if ($keyword eq "EC_NISTP_64_GCC_128" && $no_nistp_gcc)
+					{ return 0; }
+			if ($keyword eq "EC2M" && $no_ec2m) { return 0; }
+			if ($keyword eq "NEXTPROTONEG" && $no_nextprotoneg) { return 0; }
+			if ($keyword eq "SSL3_METHOD" && $no_ssl3_method) { return 0; }
+			if ($keyword eq "SSL_TRACE" && $no_ssl_trace) { return 0; }
+			if ($keyword eq "CAPIENG" && $no_capieng) { return 0; }
+			if ($keyword eq "JPAKE" && $no_jpake) { return 0; }
+			if ($keyword eq "SRP" && $no_srp) { return 0; }
+			if ($keyword eq "SCTP" && $no_sctp) { return 0; }
+			if ($keyword eq "SRTP" && $no_srtp) { return 0; }
+			if ($keyword eq "UNIT_TEST" && $no_unit_test) { return 0; }
 			if ($keyword eq "DEPRECATED" && $no_deprecated) { return 0; }
+			if ($keyword eq "OCB" && $no_ocb) { return 0; }
 
 			# Nothing recognise as true
 			return 1;
@@ -1195,8 +1299,6 @@ sub print_def_file
 
 	if ($W32)
 		{ $libname.="32"; }
-	elsif ($W16)
-		{ $libname.="16"; }
 	elsif ($OS2)
 		{ # DLL names should not clash on the whole system.
 		  # However, they should not have any particular relationship
@@ -1219,23 +1321,8 @@ EOO
 
 LIBRARY         $libname	$liboptions
 
-DESCRIPTION     '$description'
-
 EOF
 
-	if ($W16) {
-		print <<"EOF";
-CODE            PRELOAD MOVEABLE
-DATA            PRELOAD MOVEABLE SINGLE
-
-EXETYPE		WINDOWS
-
-HEAPSIZE	4096
-STACKSIZE	8192
-
-EOF
-	}
-
 	print "EXPORTS\n";
 
 	(@e)=grep(/^SSLeay(\{[0-9]+\})?\\.*?:.*?:FUNCTION/,@symbols);
@@ -1409,6 +1496,7 @@ sub update_numbers
 		next if defined($rsyms{$sym});
 		die "ERROR: Symbol $sym had no info attached to it."
 		    if $i eq "";
+		next if $i =~ /OPENSSL_FIPSCAPABLE/;
 		if (!exists $nums{$s}) {
 			$new_syms++;
 			my $s2 = $s;
@@ -1450,3 +1538,13 @@ sub check_existing
 	}
 }
 
+sub count_parens
+{
+	my $line = shift(@_);
+
+	my $open = $line =~ tr/\(//;
+	my $close = $line =~ tr/\)//;
+
+	return $open - $close;
+}
+