prevent forking a huge number of player processes by limiting them to

[micropolis] / src / sim / w_util.c

/* w_util.c
 *
 * 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
 * SATISFACTORY QUALITY AND PERFORMANCE RESIDES WITH YOU.  ELECTRONIC ARTS
 * DISCLAIMS ANY AND ALL EXPRESS, IMPLIED OR STATUTORY WARRANTIES,
 * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
 * FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT OF THIRD PARTY
 * RIGHTS, AND WARRANTIES (IF ANY) ARISING FROM A COURSE OF DEALING,
 * USAGE, OR TRADE PRACTICE.  ELECTRONIC ARTS DOES NOT WARRANT AGAINST
 * INTERFERENCE WITH YOUR ENJOYMENT OF THE PROGRAM; THAT THE PROGRAM WILL
 * MEET YOUR REQUIREMENTS; THAT OPERATION OF THE PROGRAM WILL BE
 * UNINTERRUPTED OR ERROR-FREE, OR THAT THE PROGRAM WILL BE COMPATIBLE
 * WITH THIRD PARTY SOFTWARE OR THAT ANY ERRORS IN THE PROGRAM WILL BE
 * CORRECTED.  NO ORAL OR WRITTEN ADVICE PROVIDED BY ELECTRONIC ARTS OR
 * ANY AUTHORIZED REPRESENTATIVE SHALL CREATE A WARRANTY.  SOME
 * 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 "sim.h"


/* comefrom: drawTaxesCollected incBoxValue decBoxValue drawCurrentFunds 
	     drawActualBox UpdateFunds updateCurrentCost */
makeDollarDecimalStr(char *numStr, char *dollarStr)
{
  register short leftMostSet;
  short numOfDigits;
  short numOfChars;
  register short numOfCommas;
  register short dollarIndex = 0;
  register short numIndex = 0;
  register short x;

  numOfDigits = strlen(numStr);

  if (numOfDigits == 1) {
    dollarStr[0] = '$';
    dollarStr[1] = numStr[ 0 ];
    dollarStr[2] = 0;
    return;
  } else if (numOfDigits == 2) {
    dollarStr[0] = '$';
    dollarStr[1] = numStr[0];
    dollarStr[2] = numStr[1];
    dollarStr[3] = 0;
    return;
  } else if (numOfDigits == 3) {
    dollarStr[0] = '$';
    dollarStr[1] = numStr[0];
    dollarStr[2] = numStr[1];
    dollarStr[3] = numStr[2];
    dollarStr[4] = 0;
  } else {
    leftMostSet = numOfDigits % 3;
    if (leftMostSet == 0)
      leftMostSet = 3;
    
    numOfCommas = (numOfDigits - 1) / 3;
    
    /* add 1 for the dollar sign */
    numOfChars = numOfDigits + numOfCommas + 1;
    
    dollarStr[numOfChars] = 0;
    
    dollarStr[dollarIndex++] = '$';
    
    for (x = 1; x <= leftMostSet; x++) {
      dollarStr[dollarIndex++] = numStr[numIndex++];
    }		

    for (x = 1; x <= numOfCommas; x++) {
      dollarStr[dollarIndex++] = ',';
      dollarStr[dollarIndex++] = numStr[numIndex++];
      dollarStr[dollarIndex++] = numStr[numIndex++];
      dollarStr[dollarIndex++] = numStr[numIndex++];
    }
  }
}


Pause()
{
  if (!sim_paused) {
    sim_paused_speed = SimMetaSpeed;
    setSpeed(0);
    sim_paused = 1;
  }
}


Resume()
{
  if (sim_paused) {
    sim_paused = 0;
    setSpeed(sim_paused_speed);
  }
}


setSpeed(short speed)
{
  if (speed < 0) speed = 0;
  else if (speed > 3) speed = 3;

  SimMetaSpeed = speed;

  if (sim_paused) {
    sim_paused_speed = SimMetaSpeed;
    speed = 0;
  }

  SimSpeed = speed;

  if (speed == 0) {
    StopMicropolisTimer();
  } else {
    StartMicropolisTimer();
  }

  { char buf[256];
    sprintf(buf, "UISetSpeed %d", sim_paused ? 0 : SimMetaSpeed);
    Eval(buf);
  }
}


setSkips(int skips)
{
  sim_skips = skips;
  sim_skip = 0;
}


SetGameLevelFunds(short level)
{
  switch (level) {
  default:
  case 0:
    SetFunds(20000);
    SetGameLevel(0);
    break;
  case 1:
    SetFunds(10000);
    SetGameLevel(1);
    break;
  case 2:
    SetFunds(5000);
    SetGameLevel(2);
    break;
  }
}


SetGameLevel(short level)
{
  GameLevel = level;
  UpdateGameLevel();
}


UpdateGameLevel()
{
  char buf[256];

  sprintf(buf, "UISetGameLevel %d", GameLevel);
  Eval(buf);
}


setCityName(char *name)
{
  char *cp = name;

  while (*cp) {
    if (!isalnum(*cp))
      *cp = '_';
    cp++;
  }
  setAnyCityName(name);
}


setAnyCityName(char *name)
{
  char buf[1024];

  CityName = name;
  sprintf(buf, "UISetCityName {%s}", CityName);
  Eval(buf);
}


SetYear(int year)
{
  // Must prevent year from going negative, since it screws up the non-floored modulo arithmetic.
  if (year < StartingYear) {
    year = StartingYear;
  }

  year = (year - StartingYear) - (CityTime / 48);
  CityTime += year * 48;
  doTimeStuff();
}


int
CurrentYear()
{
  return (CityTime/48 + StartingYear);
}


DoSetMapState(SimView *view, short state)
{
  char buf[256];

  view->map_state = state;
  view->invalid = 1;
  EventuallyRedrawView(view);

  sprintf(buf, "UISetMapState %s %d", Tk_PathName(view->tkwin), state);
  Eval(buf);
}


DoNewGame()
{
  Eval("UINewGame");
}


DoGeneratedCityImage(char *name, int time, int pop, char *class, int score)
{
  /* XXX: TODO: print city */
}


DoStartElmd()
{
  /* XXX: TODO: start elm daemon */
}


DoPopUpMessage(char *msg)
{
  char buf[1024];

  sprintf(buf, "UIPopUpMessage {%s}", msg);
  Eval(buf);
}