C++ STAmount::isPositive方法代码示例

//.........这里部分代码省略.........

            uLowQualityOut  = !bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfLowQualityOut);
            uHighQualityOut =  bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfHighQualityOut);
        }
        else
        {
            // Clearing.

            sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityOut : sfHighQualityOut);

            uLowQualityOut  = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityOut);
            uHighQualityOut =  bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityOut);
        }

        const uint32    uFlagsIn        = sleRippleState->getFieldU32 (sfFlags);
        uint32          uFlagsOut       = uFlagsIn;

        if (bSetNoRipple && !bClearNoRipple && (bHigh ? saHighBalance : saLowBalance).isGEZero())
        {
            uFlagsOut           |= (bHigh ? lsfHighNoRipple : lsfLowNoRipple);
        }
        else if (bClearNoRipple && !bSetNoRipple)
        {
            uFlagsOut           &= ~(bHigh ? lsfHighNoRipple : lsfLowNoRipple);
        }

        if (QUALITY_ONE == uLowQualityOut)  uLowQualityOut  = 0;

        if (QUALITY_ONE == uHighQualityOut) uHighQualityOut = 0;


        const bool  bLowReserveSet      = uLowQualityIn || uLowQualityOut ||
                                          isSetBit (uFlagsOut, lsfLowNoRipple) ||
                                          !!saLowLimit || saLowBalance.isPositive ();
        const bool  bLowReserveClear    = !bLowReserveSet;

        const bool  bHighReserveSet     = uHighQualityIn || uHighQualityOut ||
                                          isSetBit (uFlagsOut, lsfHighNoRipple) ||
                                          !!saHighLimit || saHighBalance.isPositive ();
        const bool  bHighReserveClear   = !bHighReserveSet;

        const bool  bDefault            = bLowReserveClear && bHighReserveClear;

        const bool  bLowReserved        = isSetBit (uFlagsIn, lsfLowReserve);
        const bool  bHighReserved       = isSetBit (uFlagsIn, lsfHighReserve);

        bool        bReserveIncrease    = false;

        if (bSetAuth)
        {
            uFlagsOut           |= (bHigh ? lsfHighAuth : lsfLowAuth);
        }

        if (bLowReserveSet && !bLowReserved)
        {
            // Set reserve for low account.

            mEngine->getNodes ().ownerCountAdjust (uLowAccountID, 1, sleLowAccount);
            uFlagsOut           |= lsfLowReserve;

            if (!bHigh)
                bReserveIncrease    = true;
        }

        if (bLowReserveClear && bLowReserved)
        {

//.........这里部分代码省略.........
                    WriteLog (lsTRACE, RippleCalc) << "pushNode: Credit line found between "
                                                   << RippleAddress::createHumanAccountID (pnBck.uAccountID)
                                                   << " and "
                                                   << RippleAddress::createHumanAccountID (pnCur.uAccountID)
                                                   << " for "
                                                   << STAmount::createHumanCurrency (pnCur.uCurrencyID)
                                                   << "." ;

                    SLE::pointer        sleBck  = lesEntries.entryCache (ltACCOUNT_ROOT, Ledger::getAccountRootIndex (pnBck.uAccountID));
                    bool                bHigh   = pnBck.uAccountID > pnCur.uAccountID;

                    if (!sleBck)
                    {
                        WriteLog (lsWARNING, RippleCalc) << "pushNode: delay: can't receive IOUs from non-existent issuer: " << RippleAddress::createHumanAccountID (pnBck.uAccountID);

                        terResult   = terNO_ACCOUNT;
                    }
                    else if ((isSetBit (sleBck->getFieldU32 (sfFlags), lsfRequireAuth)
                             && !isSetBit (sleRippleState->getFieldU32 (sfFlags), (bHigh ? lsfHighAuth : lsfLowAuth)))
                             && sleRippleState->getFieldAmount(sfBalance).isZero()) // CHECKME
                    {
                        WriteLog (lsWARNING, RippleCalc) << "pushNode: delay: can't receive IOUs from issuer without auth.";

                        terResult   = terNO_AUTH;
                    }
                    else if (isSetBit (sleRippleState->getFieldU32 (sfFlags), bHigh ? lsfHighNoRipple : lsfLowNoRipple) &&
                            (vpnNodes.size() > 1))
                    { // If the link leaves the side that set no ripple, it must be the first link
                        WriteLog (lsWARNING, RippleCalc) << "pushNode: illegal use of noRipple link";

                        terResult   = terNO_AUTH;
                    }

                    if (tesSUCCESS == terResult)
                    {
                        STAmount    saOwed  = lesEntries.rippleOwed (pnCur.uAccountID, pnBck.uAccountID, pnCur.uCurrencyID);
                        STAmount    saLimit;

                        if (!saOwed.isPositive ()
                                && -saOwed >= (saLimit = lesEntries.rippleLimit (pnCur.uAccountID, pnBck.uAccountID, pnCur.uCurrencyID)))
                        {
                            WriteLog (lsWARNING, RippleCalc) << boost::str (boost::format ("pushNode: dry: saOwed=%s saLimit=%s")
                                                             % saOwed
                                                             % saLimit);

                            terResult   = tecPATH_DRY;
                        }
                    }
                }
            }
        }

        if (tesSUCCESS == terResult)
        {
            vpnNodes.push_back (pnCur);
        }
    }
    else
    {
        // Offer link
        // Offers bridge a change in currency & issuer or just a change in issuer.
        pnCur.uIssuerID     = bIssuer
                              ? uIssuerID
                              : !!pnCur.uCurrencyID
                              ? !!pnPrv.uIssuerID
                              ? pnPrv.uIssuerID   // Default to previous issuer
                              : pnPrv.uAccountID  // Or previous account if no previous issuer.
                      : ACCOUNT_XRP;
        pnCur.saRateMax     = saZero;
        pnCur.saRevDeliver  = STAmount (pnCur.uCurrencyID, pnCur.uIssuerID);
        pnCur.saFwdDeliver  = pnCur.saRevDeliver;

        if (!!pnCur.uCurrencyID != !!pnCur.uIssuerID)
        {
            WriteLog (lsDEBUG, RippleCalc) << "pushNode: currency is inconsistent with issuer.";

            terResult   = temBAD_PATH;
        }
        else if (!!pnPrv.uAccountID)
        {
            // Previous is an account.
            WriteLog (lsTRACE, RippleCalc) << "pushNode: imply for offer.";

            // Insert intermediary issuer account if needed.
            terResult   = pushImply (
                              ACCOUNT_XRP,                // Rippling, but offers don't have an account.
                              pnPrv.uCurrencyID,
                              pnPrv.uIssuerID);
        }

        if (tesSUCCESS == terResult)
        {
            vpnNodes.push_back (pnCur);
        }
    }

    WriteLog (lsTRACE, RippleCalc) << boost::str (boost::format ("pushNode< : %s") % transToken (terResult));

    return terResult;
}

// Make sure an offer is still valid. If not, mark it unfunded.
bool OfferCreateTransactor::bValidOffer (
    SLE::ref            sleOfferDir,
    uint256 const&      uOfferIndex,
    const uint160&      uOfferOwnerID,
    const STAmount&     saOfferPays,
    const STAmount&     saOfferGets,
    const uint160&      uTakerAccountID,
    boost::unordered_set<uint256>&  usOfferUnfundedFound,
    boost::unordered_set<uint256>&  usOfferUnfundedBecame,
    boost::unordered_set<uint160>&  usAccountTouched,
    STAmount&           saOfferFunds)                       // <--
{
    bool    bValid;

    if (sleOfferDir->isFieldPresent (sfExpiration) && sleOfferDir->getFieldU32 (sfExpiration) <= mEngine->getLedger ()->getParentCloseTimeNC ())
    {
        // Offer is expired. Expired offers are considered unfunded. Delete it.
        WriteLog (lsINFO, OfferCreateTransactor) << "bValidOffer: encountered expired offer";

        usOfferUnfundedFound.insert (uOfferIndex);

        bValid  = false;
    }
    else if (uOfferOwnerID == uTakerAccountID)
    {
        // Would take own offer. Consider old offer expired. Delete it.
        WriteLog (lsINFO, OfferCreateTransactor) << "bValidOffer: encountered taker's own old offer";

        usOfferUnfundedFound.insert (uOfferIndex);

        bValid  = false;
    }
    else if (!saOfferGets.isPositive () || !saOfferPays.isPositive ())
    {
        // Offer has bad amounts. Consider offer expired. Delete it.
        WriteLog (lsWARNING, OfferCreateTransactor) << boost::str (boost::format ("bValidOffer: BAD OFFER: saOfferPays=%s saOfferGets=%s")
                % saOfferPays % saOfferGets);

        usOfferUnfundedFound.insert (uOfferIndex);
    }
    else
    {
        WriteLog (lsTRACE, OfferCreateTransactor) << "bValidOffer: saOfferPays=" << saOfferPays.getFullText ();

        saOfferFunds    = mEngine->getNodes ().accountFunds (uOfferOwnerID, saOfferPays);

        if (!saOfferFunds.isPositive ())
        {
            // Offer is unfunded, possibly due to previous balance action.
            WriteLog (lsDEBUG, OfferCreateTransactor) << "bValidOffer: offer unfunded: delete";

            boost::unordered_set<uint160>::iterator account = usAccountTouched.find (uOfferOwnerID);

            if (account != usAccountTouched.end ())
            {
                // Previously touched account.
                usOfferUnfundedBecame.insert (uOfferIndex); // Delete unfunded offer on success.
            }
            else
            {
                // Never touched source account.
                usOfferUnfundedFound.insert (uOfferIndex);  // Delete found unfunded offer when possible.
            }

            bValid  = false;
        }
        else
        {
            bValid  = true;
        }
    }

    return bValid;
}

// Take as much as possible. Adjusts account balances. Charges fees on top to taker.
// -->    uBookBase: The order book to take against.
// -->  saTakerPays: What the taker offers (w/ issuer)
// -->  saTakerGets: What the taker wanted (w/ issuer)
// <--  saTakerPaid: What taker could have paid including saved not including fees. To reduce an offer.
// <--   saTakerGot: What taker got not including fees. To reduce an offer.
// <--    terResult: tesSUCCESS, terNO_ACCOUNT, telFAILED_PROCESSING, or tecFAILED_PROCESSING
// <--    bUnfunded: if tesSUCCESS, consider offer unfunded after taking.
TER OfferCreateTransactor::takeOffers (
    const bool          bOpenLedger,
    const bool          bPassive,
    const bool          bSell,
    uint256 const&      uBookBase,
    const uint160&      uTakerAccountID,
    SLE::ref            sleTakerAccount,
    const STAmount&     saTakerPays,
    const STAmount&     saTakerGets,
    STAmount&           saTakerPaid,
    STAmount&           saTakerGot,
    bool&               bUnfunded)
{
    // The book has the most elements. Take the perspective of the book.
    // Book is ordered for taker: taker pays / taker gets (smaller is better)

    // The order is for the other books currencys for get and pays are opposites.
    // We want the same ratio for the respective currencies.
    // So we swap paid and gets for determing take quality.

    assert (saTakerPays && saTakerGets);

    WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: bSell: " << bSell << ": against book: " << uBookBase.ToString ();

    LedgerEntrySet&         lesActive           = mEngine->getNodes ();
    uint256                 uTipIndex           = uBookBase;
    const uint256           uBookEnd            = Ledger::getQualityNext (uBookBase);
    const uint64            uTakeQuality        = STAmount::getRate (saTakerGets, saTakerPays);
    STAmount                saTakerRate         = STAmount::setRate (uTakeQuality);
    const uint160           uTakerPaysAccountID = saTakerPays.getIssuer ();
    const uint160           uTakerGetsAccountID = saTakerGets.getIssuer ();
    TER                     terResult           = temUNCERTAIN;

    boost::unordered_set<uint256>   usOfferUnfundedBecame;  // Offers that became unfunded.
    boost::unordered_set<uint160>   usAccountTouched;       // Accounts touched.

    saTakerPaid     = STAmount (saTakerPays.getCurrency (), saTakerPays.getIssuer ());
    saTakerGot      = STAmount (saTakerGets.getCurrency (), saTakerGets.getIssuer ());
    bUnfunded       = false;

    while (temUNCERTAIN == terResult)
    {
        SLE::pointer    sleOfferDir;
        uint64          uTipQuality     = 0;
        STAmount        saTakerFunds    = lesActive.accountFunds (uTakerAccountID, saTakerPays);
        STAmount        saSubTakerPays  = saTakerPays - saTakerPaid; // How much more to spend.
        STAmount        saSubTakerGets  = saTakerGets - saTakerGot; // How much more is wanted.

        // Figure out next offer to take, if needed.
        if (saTakerFunds.isPositive ()          // Taker has funds available.
                && saSubTakerPays.isPositive ()
                && saSubTakerGets.isPositive ())
        {
            sleOfferDir     = mEngine->entryCache (ltDIR_NODE, lesActive.getNextLedgerIndex (uTipIndex, uBookEnd));

            if (sleOfferDir)
            {
                uTipIndex       = sleOfferDir->getIndex ();
                uTipQuality     = Ledger::getQuality (uTipIndex);

                WriteLog (lsDEBUG, OfferCreateTransactor) << boost::str (boost::format ("takeOffers: possible counter offer found: uTipQuality=%d uTipIndex=%s")
                        % uTipQuality
                        % uTipIndex.ToString ());

            }
            else
            {
                WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: counter offer book is empty: "
                        << uTipIndex.ToString ()
                        << " ... "
                        << uBookEnd.ToString ();
            }
        }

        if (!saTakerFunds.isPositive ())                    // Taker has no funds.
        {
            // Done. Ran out of funds on previous round. As fees aren't calculated directly in this routine, funds are checked here.
            WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: done: taker unfunded.";

            bUnfunded   = true;                             // Don't create an order.
            terResult   = tesSUCCESS;
        }
        else if (!sleOfferDir                               // No offer directory to take.
                 || uTakeQuality < uTipQuality                   // No offers of sufficient quality available.
                 || (bPassive && uTakeQuality == uTipQuality))
        {
            // Done.
            STAmount    saTipRate           = sleOfferDir ? STAmount::setRate (uTipQuality) : saTakerRate;

            WriteLog (lsDEBUG, OfferCreateTransactor) << boost::str (boost::format ("takeOffers: done: dir=%d uTakeQuality=%d %c uTipQuality=%d saTakerRate=%s %c saTipRate=%s bPassive=%d")
                    % !!sleOfferDir
                    % uTakeQuality
//.........这里部分代码省略.........

// Take as much as possible. Adjusts account balances. Charges fees on top to taker.
// -->    uBookBase: The order book to take against.
// -->  saTakerPays: What the taker offers (w/ issuer)
// -->  saTakerGets: What the taker wanted (w/ issuer)
// <--  saTakerPaid: What taker could have paid including saved not including fees. To reduce an offer.
// <--   saTakerGot: What taker got not including fees. To reduce an offer.
// <--    terResult: tesSUCCESS, terNO_ACCOUNT, telFAILED_PROCESSING, or tecFAILED_PROCESSING
// <--    bUnfunded: if tesSUCCESS, consider offer unfunded after taking.
TER OfferCreateTransactor::takeOffers (
    const bool          bOpenLedger,
    const bool          bPassive,
    const bool          bSell,
    uint256 const&      uBookBase,
    const uint160&      uTakerAccountID,
    SLE::ref            sleTakerAccount,
    const STAmount&     saTakerPays,
    const STAmount&     saTakerGets,
    STAmount&           saTakerPaid,
    STAmount&           saTakerGot,
    bool&               bUnfunded)
{
    // The book has the most elements. Take the perspective of the book.
    // Book is ordered for taker: taker pays / taker gets (smaller is better)

    // The order is for the other books currencys for get and pays are opposites.
    // We want the same ratio for the respective currencies.
    // So we swap paid and gets for determing take quality.

    assert (saTakerPays && saTakerGets);

    WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: bSell: " << bSell << ": against book: " << uBookBase.ToString ();

    LedgerEntrySet&         lesActive           = mEngine->getNodes ();
    const uint64            uTakeQuality        = STAmount::getRate (saTakerGets, saTakerPays);
    STAmount                saTakerRate         = STAmount::setRate (uTakeQuality);
    const uint160           uTakerPaysAccountID = saTakerPays.getIssuer ();
    const uint160           uTakerGetsAccountID = saTakerGets.getIssuer ();
    TER                     terResult           = temUNCERTAIN;

    boost::unordered_set<uint256>   usOfferUnfundedBecame;  // Offers that became unfunded.
    boost::unordered_set<uint160>   usAccountTouched;       // Accounts touched.

    saTakerPaid     = STAmount (saTakerPays.getCurrency (), saTakerPays.getIssuer ());
    saTakerGot      = STAmount (saTakerGets.getCurrency (), saTakerGets.getIssuer ());
    bUnfunded       = false;

    OrderBookIterator bookIterator (lesActive,
        saTakerPays.getCurrency(), saTakerPays.getIssuer(),
        saTakerGets.getCurrency(), saTakerGets.getIssuer());

    while ((temUNCERTAIN == terResult) && bookIterator.nextOffer())
    {
        STAmount        saTakerFunds    = lesActive.accountFunds (uTakerAccountID, saTakerPays);
        STAmount        saSubTakerPays  = saTakerPays - saTakerPaid; // How much more to spend.
        STAmount        saSubTakerGets  = saTakerGets - saTakerGot; // How much more is wanted.
        uint64          uTipQuality     = bookIterator.getCurrentQuality();

        if (!saTakerFunds.isPositive ())
        {
            // Taker is out of funds. Don't create the offer.
            bUnfunded = true;
            terResult = tesSUCCESS;
        }
        else if (!saSubTakerPays.isPositive() || !saSubTakerGets.isPositive())
        {
            // Offer is completely consumed
            terResult = tesSUCCESS;
        }
        else if ((uTakeQuality < uTipQuality)
                 || (bPassive && uTakeQuality == uTipQuality))
        {
            // Offer does not cross this offer
            STAmount    saTipRate           = STAmount::setRate (uTipQuality);

            WriteLog (lsDEBUG, OfferCreateTransactor) << boost::str (boost::format ("takeOffers: done: uTakeQuality=%d %c uTipQuality=%d saTakerRate=%s %c saTipRate=%s bPassive=%d")
                    % uTakeQuality
                    % (uTakeQuality == uTipQuality
                       ? '='
                       : uTakeQuality < uTipQuality
                       ? '<'
                       : '>')
                    % uTipQuality
                    % saTakerRate
                    % (saTakerRate == saTipRate
                       ? '='
                       : saTakerRate < saTipRate
                       ? '<'
                       : '>')
                    % saTipRate
                    % bPassive);

            terResult   = tesSUCCESS;
        }
        else
        {
            // We have a crossing offer to consider.

            SLE::pointer    sleOffer        = bookIterator.getCurrentOffer ();

            if (!sleOffer)
//.........这里部分代码省略.........