budget.cpp

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/* budget.cpp
 *
 * Micropolis, Unix Version.  This game was released for the Unix platform
 * in or about 1990 and has been modified for inclusion in the One Laptop
 * Per Child program.  Copyright (C) 1989 - 2007 Electronic Arts Inc.  If
 * you need assistance with this program, you may contact:
 *   http://wiki.laptop.org/go/Micropolis  or email  micropolis@laptop.org.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * This program 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 for more details.  You should have received a
 * copy of the GNU General Public License along with this program.  If
 * not, see <http://www.gnu.org/licenses/>.
 *
 *             ADDITIONAL TERMS per GNU GPL Section 7
 *
 * No trademark or publicity rights are granted.  This license does NOT
 * give you any right, title or interest in the trademark SimCity or any
 * other Electronic Arts trademark.  You may not distribute any
 * modification of this program using the trademark SimCity or claim any
 * affliation or association with Electronic Arts Inc. or its employees.
 *
 * Any propagation or conveyance of this program must include this
 * copyright notice and these terms.
 *
 * If you convey this program (or any modifications of it) and assume
 * contractual liability for the program to recipients of it, you agree
 * to indemnify Electronic Arts for any liability that those contractual
 * assumptions impose on Electronic Arts.
 *
 * You may not misrepresent the origins of this program; modified
 * versions of the program must be marked as such and not identified as
 * the original program.
 *
 * This disclaimer supplements the one included in the General Public
 * License.  TO THE FULLEST EXTENT PERMISSIBLE UNDER APPLICABLE LAW, THIS
 * PROGRAM IS PROVIDED TO YOU "AS IS," WITH ALL FAULTS, WITHOUT WARRANTY
 * OF ANY KIND, AND YOUR USE IS AT YOUR SOLE RISK.  THE ENTIRE RISK OF
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 * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
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 * JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF OR LIMITATIONS ON IMPLIED
 * WARRANTIES OR THE LIMITATIONS ON THE APPLICABLE STATUTORY RIGHTS OF A
 * CONSUMER, SO SOME OR ALL OF THE ABOVE EXCLUSIONS AND LIMITATIONS MAY
 * NOT APPLY TO YOU.
 */
 
 
 
#include "micropolis.h"
 
 
 
 
void Micropolis::initFundingLevel()
{
    firePercent = 1.0;
    fireValue = 0;
    policePercent = 1.0;
    policeValue = 0;
    roadPercent = 1.0;
    roadValue = 0;
    mustDrawBudget = 1;
}
 
void Micropolis::doBudget()
{
    doBudgetNow(false);
}
 
 
void Micropolis::doBudgetFromMenu()
{
    doBudgetNow(true);
}
 
 
void Micropolis::doBudgetNow(bool fromMenu)
{
    Quad fireInt   = (int)(fireFund   * firePercent);
    Quad policeInt = (int)(policeFund * policePercent);
    Quad roadInt   = (int)(roadFund   * roadPercent);
 
    Quad total = fireInt + policeInt + roadInt;
 
    Quad yumDuckets = taxFund + totalFunds;
 
    if (yumDuckets > total) {
 
        // Enough yumDuckets to fully fund fire, police and road.
 
        fireValue = fireInt;
        policeValue = policeInt;
        roadValue = roadInt;
 
 
    } else if (total > 0) {
 
        assert(yumDuckets <= total);
 
        // Not enough yumDuckets to fund everything.
        // First spend on roads, then on fire, then on police.
 
        if (yumDuckets > roadInt) {
 
            // Enough yumDuckets to fully fund roads.
 
            roadValue = roadInt;
            yumDuckets -= roadInt;
 
            if (yumDuckets > fireInt) {
 
                // Enough yumDuckets to fully fund fire.
 
                fireValue = fireInt;
                yumDuckets -= fireInt;
 
                if (yumDuckets > policeInt) {
 
                    // Enough yumDuckets to fully fund police.
                    // Hey what are we doing here? Should never get here.
                    // We tested for yumDuckets > total above
                    // (where total = fireInt + policeInt + roadInt),
                    // so this should never happen.
 
                    policeValue = policeInt;
                    yumDuckets -= policeInt;
 
                } else {
 
                    // Fuly funded roads and fire.
                    // Partially fund police.
 
                    policeValue = yumDuckets;
 
                    if (yumDuckets > 0) {
 
                        // Scale back police percentage to available cash.
 
                        policePercent = ((float)yumDuckets) / ((float)policeFund);
 
                    } else {
 
                        // Exactly nothing left, so scale back police percentage to zero.
 
                        policePercent = 0.0;
 
                    }
 
                }
 
            } else {
 
                // Not enough yumDuckets to fully fund fire.
 
                fireValue = yumDuckets;
 
                // No police after funding roads and fire.
 
                policeValue = 0;
                policePercent = 0.0;
 
                if (yumDuckets > 0) {
 
                    // Scale back fire percentage to available cash.
 
                    firePercent =
                        ((float)yumDuckets) / ((float)fireFund);
 
                } else {
 
                  // Exactly nothing left, so scale back fire percentage to zero.
 
                  firePercent = 0.0;
 
                }
 
            }
 
        } else {
 
            // Not enough yumDuckets to fully fund roads.
 
            roadValue = yumDuckets;
 
            // No fire or police after funding roads.
 
            fireValue = 0;
            policeValue = 0;
            firePercent = 0.0;
            policePercent = 0.0;
 
            if (yumDuckets > 0) {
 
                // Scale back road percentage to available cash.
 
                roadPercent = ((float)yumDuckets) / ((float)roadFund);
 
            } else {
 
                // Exactly nothing left, so scale back road percentage to zero.
 
                roadPercent = 0.0;
 
            }
 
        }
 
    } else {
 
        assert(yumDuckets == total);
        assert(total == 0);
 
        // Zero funding, so no values but full percentages.
 
        fireValue = 0;
        policeValue = 0;
        roadValue = 0;
        firePercent = 1.0;
        policePercent = 1.0;
        roadPercent = 1.0;
 
    }
 
noMoney:
 
    if (!autoBudget || fromMenu) {
 
        // FIXME: This might have blocked on the Mac, but now it's asynchronous.
        // Make sure the stuff we do just afterwards is intended to be done immediately
        // and is not supposed to wait until after the budget dialog is dismissed.
        // Otherwise don't do it after this and arrange for it to happen when the
        // modal budget dialog is dismissed.
        showBudgetWindowAndStartWaiting();
 
        // FIXME: Only do this AFTER the budget window is accepted.
 
        if (!fromMenu) {
 
            fireSpend = fireValue;
            policeSpend = policeValue;
            roadSpend = roadValue;
 
            total = fireSpend + policeSpend + roadSpend;
 
            Quad moreDough = (Quad)(taxFund - total);
            spend(-moreDough);
 
        }
 
        mustDrawBudget = 1;
        doUpdateHeads();
 
    } else { /* autoBudget & !fromMenu */
 
        // FIXME: Not sure yumDuckets is the right value here. It gets the
        // amount spent subtracted from it above in some cases, but not if
        // we are fully funded. I think we want to use the original value
        // of yumDuckets, which is taxFund + totalFunds.
 
        if (yumDuckets > total) {
 
            Quad moreDough = (Quad)(taxFund - total);
            spend(-moreDough);
 
            fireSpend = fireFund;
            policeSpend = policeFund;
            roadSpend = roadFund;
 
            mustDrawBudget = 1;
            doUpdateHeads();
 
        } else {
 
            setAutoBudget(false); /* force autobudget */
            mustUpdateOptions = true;
            sendMessage(MESSAGE_NO_MONEY, NOWHERE, NOWHERE, false, true);
            goto noMoney;
 
        }
 
    }
 
}
 
 
void Micropolis::updateBudget()
{
 
    if (mustDrawBudget) {
        callback->updateBudget(this, callbackVal);
        mustDrawBudget = 0;
    }
}
 
 
void Micropolis::showBudgetWindowAndStartWaiting()
{
    callback->showBudgetAndWait(this, callbackVal);
}
 
 
void Micropolis::setCityTax(short tax)
{
    cityTax = tax;
    callback->updateTaxRate(this, callbackVal, cityTax);
}