genSocketOptionRegistry.c

/*
 * Copyright 2007-2008 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

#include <stdio.h>
#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#endif

/**
 * Generates sun.nio.ch.SocketOptionRegistry, a class that maps Java-level
 * socket options to the platform specific level and option.
 */

static void out(char* s) {
    printf("%s\n", s);
}

static void emit(const char *name, char * family, int level, int optname) {
    printf("            map.put(new RegistryKey(%s, %s),", name, family);
    printf(" new OptionKey(%d, %d));\n", level, optname);
}

static void emit_unspec(const char *name, int level, int optname) {
    emit(name, "Net.UNSPEC", level, optname);
}

static  void emit_inet(const char *name, int level, int optname) {
    emit(name, "StandardProtocolFamily.INET", level, optname);
}

static void emit_inet6(const char *name, int level, int optname) {
    emit(name, "StandardProtocolFamily.INET6", level, optname);
}

int main(int argc, const char* argv[]) {
    out("// AUTOMATICALLY GENERATED FILE - DO NOT EDIT                                  ");
    out("package sun.nio.ch;                                                            ");
    out("import java.net.SocketOption;                                                  ");
    out("import java.net.StandardSocketOption;                                          ");
    out("import java.net.ProtocolFamily;                                                ");
    out("import java.net.StandardProtocolFamily;                                        ");
    out("import java.util.Map;                                                          ");
    out("import java.util.HashMap;                                                      ");
    out("class SocketOptionRegistry {                                                   ");
    out("    private SocketOptionRegistry() { }                                         ");
    out("    private static class RegistryKey {                                         ");
    out("        private final SocketOption name;                                       ");
    out("        private final ProtocolFamily family;                                   ");
    out("        RegistryKey(SocketOption name, ProtocolFamily family) {                ");
    out("            this.name = name;                                                  ");
    out("            this.family = family;                                              ");
    out("        }                                                                      ");
    out("        public int hashCode() {                                                ");
    out("            return name.hashCode() + family.hashCode();                        ");
    out("        }                                                                      ");
    out("        public boolean equals(Object ob) {                                     ");
    out("            if (ob == null) return false;                                      ");
    out("            if (!(ob instanceof RegistryKey)) return false;                    ");
    out("            RegistryKey other = (RegistryKey)ob;                               ");
    out("            if (this.name != other.name) return false;                         ");
    out("            if (this.family != other.family) return false;                     ");
    out("            return true;                                                       ");
    out("        }                                                                      ");
    out("    }                                                                          ");
    out("    private static class LazyInitialization {                                  ");
    out("        static final Map<RegistryKey,OptionKey> options = options();           ");
    out("        private static Map<RegistryKey,OptionKey> options() {                  ");
    out("            Map<RegistryKey,OptionKey> map =                                   ");
    out("                new HashMap<RegistryKey,OptionKey>();                          ");

    emit_unspec("StandardSocketOption.SO_BROADCAST", SOL_SOCKET, SO_BROADCAST);
    emit_unspec("StandardSocketOption.SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE);
    emit_unspec("StandardSocketOption.SO_LINGER",    SOL_SOCKET, SO_LINGER);
    emit_unspec("StandardSocketOption.SO_SNDBUF",    SOL_SOCKET, SO_SNDBUF);
    emit_unspec("StandardSocketOption.SO_RCVBUF",    SOL_SOCKET, SO_RCVBUF);
    emit_unspec("StandardSocketOption.SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR);
    emit_unspec("StandardSocketOption.TCP_NODELAY",  IPPROTO_TCP, TCP_NODELAY);

    emit_inet("StandardSocketOption.IP_TOS",            IPPROTO_IP,     IP_TOS);
    emit_inet("StandardSocketOption.IP_MULTICAST_IF",   IPPROTO_IP,     IP_MULTICAST_IF);
    emit_inet("StandardSocketOption.IP_MULTICAST_TTL",  IPPROTO_IP,     IP_MULTICAST_TTL);
    emit_inet("StandardSocketOption.IP_MULTICAST_LOOP", IPPROTO_IP,     IP_MULTICAST_LOOP);

#ifdef AF_INET6
    emit_inet6("StandardSocketOption.IP_MULTICAST_IF",   IPPROTO_IPV6,  IPV6_MULTICAST_IF);
    emit_inet6("StandardSocketOption.IP_MULTICAST_TTL",  IPPROTO_IPV6,  IPV6_MULTICAST_HOPS);
    emit_inet6("StandardSocketOption.IP_MULTICAST_LOOP", IPPROTO_IPV6,  IPV6_MULTICAST_LOOP);
#endif

    emit_unspec("ExtendedSocketOption.SO_OOBINLINE", SOL_SOCKET, SO_OOBINLINE);

    out("            return map;                                                        ");
    out("        }                                                                      ");
    out("    }                                                                          ");
    out("    public static OptionKey findOption(SocketOption name, ProtocolFamily family) { ");
    out("        RegistryKey key = new RegistryKey(name, family);                       ");
    out("        return LazyInitialization.options.get(key);                            ");
    out("    }                                                                          ");
    out("}                                                                              ");

    return 0;
}