oid.h

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// oid.h

/*    Copyright 2009 10gen Inc.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

#pragma once

#include "../util/hex.h"

namespace mongo {

#pragma pack(1)

    class OID {
    public:
        OID() : a(0), b(0) { }

        explicit OID(const string &s) { init(s); }

        void clear() { a = 0; b = 0; }

        const unsigned char *getData() const { return data; }

        bool operator==(const OID& r) const { return a==r.a && b==r.b; }
        bool operator!=(const OID& r) const { return a!=r.a || b!=r.b; }
        int compare( const OID& other ) const { return memcmp( data , other.data , 12 ); }
        bool operator<( const OID& other ) const { return compare( other ) < 0; }
        bool operator<=( const OID& other ) const { return compare( other ) <= 0; }

        string str() const { return toHexLower(data, 12); }
        string toString() const { return str(); }

        static OID gen() { OID o; o.init(); return o; }

        void init();

        void init( string s );

        void init( Date_t date, bool max=false );

        time_t asTimeT();
        Date_t asDateT() { return asTimeT() * (long long)1000; }

        bool isSet() const { return a || b; }

        static void justForked();

        static unsigned getMachineId(); // features command uses
        static void regenMachineId(); // used by unit tests

    private:
        struct MachineAndPid {
            unsigned char _machineNumber[3];
            unsigned short _pid;
            bool operator!=(const OID::MachineAndPid& rhs) const;
        };
        static MachineAndPid ourMachine, ourMachineAndPid;
        union {
            struct {
                // 12 bytes total
                unsigned char _time[4];
                MachineAndPid _machineAndPid;
                unsigned char _inc[3];
            };
            struct {
                long long a;
                unsigned b;
            };
            unsigned char data[12];
        };

        static unsigned ourPid();
        static void foldInPid(MachineAndPid& x);
        static MachineAndPid genMachineAndPid();
    };
#pragma pack()

    ostream& operator<<( ostream &s, const OID &o );
    inline StringBuilder& operator<< (StringBuilder& s, const OID& o) { return (s << o.str()); }

    enum JsonStringFormat {
        Strict,
        TenGen,
        JS
    };

    inline ostream& operator<<( ostream &s, const OID &o ) {
        s << o.str();
        return s;
    }

}

---

mongodb
Author(s): Nate Koenig
autogenerated on Fri Jan 11 12:15:18 2013