125 lines
2.7 KiB
C++
125 lines
2.7 KiB
C++
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/**
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@file GUniqueID.cpp
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@author Morgan McGuire, http://graphics.cs.williams.edu
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*/
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#include "G3D/GUniqueID.h"
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#include "G3D/BinaryInput.h"
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#include "G3D/TextInput.h"
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#include "G3D/BinaryOutput.h"
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#include "G3D/TextOutput.h"
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#include "G3D/NetworkDevice.h"
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#include "G3D/Any.h"
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namespace G3D {
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GUniqueID& GUniqueID::operator=(const Any& a) {
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a.verifyName("GUniqueID");
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a.verifyType(Any::ARRAY);
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a.verifySize(1);
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std::string s = a[0];
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a.verify(s.length() == 16);
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id = GUniqueID::fromString16(s);
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return *this;
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}
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Any GUniqueID::toAny() const {
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Any a(Any::ARRAY, "GUniqueID");
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a.append(toString16());
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return a;
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}
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void GUniqueID::serialize(BinaryOutput& b) const {
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b.writeUInt64(id);
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}
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void GUniqueID::deserialize(BinaryInput& b) {
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id = b.readUInt64();
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}
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void GUniqueID::serialize(TextOutput& t) const {
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t.writeSymbol("(");
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t.writeNumber((double)(id >> 32));
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t.writeNumber((double)(id & 0xFFFFFFFF));
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t.writeSymbol(")");
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}
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void GUniqueID::deserialize(TextInput& t) {
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t.readSymbol("(");
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id = (((uint64)t.readNumber()) << 32) + (uint64)t.readNumber();
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t.readSymbol(")");
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}
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GUniqueID GUniqueID::NONE(uint16 tag) {
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GUniqueID i;
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uint64 t = tag;
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i.id = (t << 54);
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return i;
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}
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std::string GUniqueID::toString16() const {
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return format("%08x%08x", uint32(id >> 32), uint32(id & 0xFFFFFFFF));
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}
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GUniqueID GUniqueID::fromString16(const std::string& s) {
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if (s.length() != 16) {
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debugAssertM(false, "Corrupt 16-character string");
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return GUniqueID();
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}
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uint32 high = 0, low = 0;
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sscanf(s.c_str(), "%08x%08x", &high, &low);
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GUniqueID i;
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i.id = (uint64(high) << 32) | low;
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return i;
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}
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GUniqueID GUniqueID::create(uint16 tag) {
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static uint64 counter = 0;
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static uint64 systemID = 0;
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if (systemID == 0) {
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// Create a unique ID for this machine/program instance
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// TODO: see ioctl(skfd, SIOCGIFHWADDR, &if_hwaddr)
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Array<NetAddress> addr;
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NetworkDevice::instance()->localHostAddresses(addr);
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if (addr.size() > 0) {
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systemID |= addr[0].ip();
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}
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union {
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float64 ft;
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uint64 ut;
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};
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ft = System::time();
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systemID = ut << 22;
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systemID ^= ((uint64)iRandom(0, 32768)) << 8;
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systemID &= ~((uint64)1023 << 54);
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// Ensure that the systemID is non-zero (vanishingly small probability)
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if (systemID == 0) {
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systemID = 1;
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}
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}
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// No need for modulo; we'll all be dead before this counter
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// overflows 54 bits
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++counter;
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GUniqueID i;
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i.id = (((uint64)(tag & 1023)) << 54) | (counter ^ systemID);
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return i;
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}
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} // G3D
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