Description: port to D language version 2
  With this patch the code is accepted by gdc-4.6 0.29.1-4.6.4-3 without
  triggering deprecated feature warnings/errors.
Author: Peter De Wachter <pdewacht@gmail.com>

--- a/src/abagames/p47/BarrageManager.d
+++ b/src/abagames/p47/BarrageManager.d
@@ -7,8 +7,9 @@
 
 private:
 import std.string;
+import std.conv;
 import std.path;
-import dirent;
+import std.file;
 import bulletml;
 import abagames.p47.MorphBullet;
 import abagames.util.Logger;
@@ -24,12 +25,12 @@
     LARGE, LARGEMOVE,
     MORPH_LOCK, SMALL_LOCK, MIDDLESUB_LOCK,
   }
-  const int BARRAGE_TYPE = 13;
-  const int BARRAGE_MAX = 64;
+  static const int BARRAGE_TYPE = 13;
+  static const int BARRAGE_MAX = 64;
   BulletMLParserTinyXML* parser[BARRAGE_TYPE][BARRAGE_MAX];
   int parserNum[BARRAGE_TYPE];
  private:
-  const char[][BARRAGE_TYPE] dirName = 
+  static const string[BARRAGE_TYPE] dirName = 
     ["/usr/share/games/parsec47/morph",
      "/usr/share/games/parsec47/small",
      "/usr/share/games/parsec47/smallmove",
@@ -47,22 +48,17 @@
 
   public void loadBulletMLs() {
     for (int i = 0; i< BARRAGE_TYPE; i++) {
-      DIR* d = opendir(dirName[i]);
-      int j;
-      for (j = 0;;) {
-	char* fn = readdir_filename(d);
-	if (!fn) 
-	  break;
-	char[] fileName = std.string.toString(fn);
-	if (getExt(fileName) != "xml")
+      int j = 0;
+      auto files = dirEntries(dirName[i], SpanMode.shallow);
+      foreach (string fileName; files) {
+	if (extension(fileName) != ".xml")
 	  continue;
-	Logger.info("Load BulletML: " ~ dirName[i] ~ "/" ~ fileName);
+	Logger.info("Load BulletML: " ~ fileName);
 	parser[i][j] = 
-	  BulletMLParserTinyXML_new(std.string.toStringz(dirName[i] ~ "/" ~ fileName));
+	  BulletMLParserTinyXML_new(std.string.toStringz(fileName));
 	BulletMLParserTinyXML_parse(parser[i][j]);
 	j++;
       }
-      closedir(d);
       parserNum[i] = j;
     }
   }
--- a/src/abagames/p47/BulletActor.d
+++ b/src/abagames/p47/BulletActor.d
@@ -254,7 +254,7 @@
     if (!isVisible)
       return;
     float d;
-    switch (bullet.shape) {
+    switch (bullet.shape) { default: break;
     case 0:
     case 2:
     case 5:
@@ -311,7 +311,7 @@
       for (int j = 0; j < BULLET_SHAPE_NUM + 1; j++) {
 	glNewList(displayListIdx + idx, GL_COMPILE);
 	Screen3D.setColor(r, g, b, 1);
-	switch (j) {
+	switch (j) { default: break;
 	case 0:
 	  glBegin(GL_TRIANGLE_FAN);
 	  glVertex3f(-SHAPE_POINT_SIZE, -SHAPE_POINT_SIZE,  0);
--- a/src/abagames/p47/BulletActorPool.d
+++ b/src/abagames/p47/BulletActorPool.d
@@ -24,7 +24,7 @@
   int cnt;
 
   public this(int n, ActorInitializer ini) {
-    auto BulletActor bulletActorClass = new BulletActor;
+    scope BulletActor bulletActorClass = new BulletActor;
     super(n, bulletActorClass, ini);
     Bullet.setBulletsManager(this);
     BulletActor.init();
@@ -109,7 +109,7 @@
     return ba;
   }
 
-  public void move() {
+  public override void move() {
     super.move();
     cnt++;
   }
--- a/src/abagames/p47/EnemyType.d
+++ b/src/abagames/p47/EnemyType.d
@@ -217,7 +217,7 @@
   }
 
   private void createEnemyColor() {
-    switch (ect) {
+    switch (ect) { default: break;
     case 0:
       er = 1;
       eg = rand.nextFloat(0.7) + 0.3;
@@ -267,7 +267,7 @@
     bodyShapePos[3].x = -x2;
     bodyShapePos[3].y = -y2;
     retroSize = enemySize[size][4];
-    switch (size) {
+    switch (size) { default: break;
     case SMALL:
     case MIDDLE:
     case MIDDLEBOSS:
@@ -309,7 +309,7 @@
 	  md = rand.nextFloat(std.math.PI / 2) + std.math.PI / 4 * 3;
 	mpx = px / 2 + sin(md) * (enemySize[size][8] / 2 + rand.nextFloat(enemySize[size][8]/2));
 	mpy = py / 2 + cos(md) * (enemySize[size][8] / 2 + rand.nextFloat(enemySize[size][8]/2));
-	switch (size) {
+	switch (size) { default: break;
 	case SMALL:
 	case MIDDLE:
 	case LARGE:
@@ -335,7 +335,7 @@
 	    collisionSize.y = cpy;
 	}
       }
-      switch (wrl) {
+      switch (wrl) { default: break;
       case 1:
 	bt.wingShapePos[0].x = px / 4 * wrl;
 	bt.wingShapePos[0].y = py / 4;
@@ -441,7 +441,7 @@
     setBarrageType(br, BarrageManager.MIDDLE, mode);
     float cr, sr;
     if (mode == ROLL) {
-      switch (rand.nextInt(6)) {
+      switch (rand.nextInt(6)) { default: break;
       case 0:
       case 1:
 	cr = rank / 3 * 2;
@@ -459,7 +459,7 @@
 	break;
       }
     } else {
-      switch (rand.nextInt(6)) {
+      switch (rand.nextInt(6)) { default: break;
       case 0:
       case 1:
 	cr = rank / 5;
@@ -502,7 +502,7 @@
     setBarrageType(br, BarrageManager.LARGE, mode);
     float cr, sr1, sr2;
     if (mode == ROLL) {
-      switch (rand.nextInt(9)) {
+      switch (rand.nextInt(9)) { default: break;
       case 0:
       case 1:
       case 2:
@@ -529,7 +529,7 @@
 	break;
       }
     } else {
-      switch (rand.nextInt(9)) {
+      switch (rand.nextInt(9)) { default: break;
       case 0:
 	cr = rank / 4 * 3;
 	sr1 = sr2 = 0;
@@ -587,7 +587,7 @@
       Barrage br = barrage[i];
       setBarrageType(br, BarrageManager.LARGE, mode);
       float cr, sr;
-      switch (rand.nextInt(3)) {
+      switch (rand.nextInt(3)) { default: break;
       case 0:
 	cr = rank;
 	sr = 0;
@@ -625,7 +625,7 @@
       Barrage br = barrage[i];
       setBarrageType(br, BarrageManager.LARGE, mode);
       float cr, sr1, sr2;
-      switch (rand.nextInt(3)) {
+      switch (rand.nextInt(3)) { default: break;
       case 0:
 	cr = rank;
 	sr1 = sr2 = 0;
--- a/src/abagames/p47/Field.d
+++ b/src/abagames/p47/Field.d
@@ -46,7 +46,7 @@
   }
 
   public void setColor(int mode) {
-    switch (mode){
+    switch (mode){ default: break;
     case P47GameManager.ROLL:
       r = 0.2;
       g = 0.2;
@@ -72,7 +72,7 @@
   }
 
   public void setType(int type) {
-    switch (type) {
+    switch (type) { default: break;
     case 0:
       aimYawYBase = 30;
       aimYawZBase = 0;
--- a/src/abagames/p47/LetterRender.d
+++ b/src/abagames/p47/LetterRender.d
@@ -23,7 +23,7 @@
     WHITE, RED
   }
 
-  private static void changeColor(int c) {
+  public static void changeColor(int c) {
     colorIdx = c * LETTER_NUM;
   }
 
@@ -40,12 +40,12 @@
     TO_RIGHT, TO_DOWN, TO_LEFT, TO_UP,
   }
 
-  public static void drawString(char[] str, float lx, float y, float s, int d) {
+  public static void drawString(string str, float lx, float y, float s, int d) {
     float x = lx;
     int c;
     int idx;
     float ld;
-    switch (d) {
+    switch (d) { default: break;
     case TO_RIGHT:
       ld = 0;
       break;
@@ -79,7 +79,7 @@
 	}
 	drawLetter(idx, x, y, s, ld);
       }
-      switch(d) {
+      switch(d) { default: break;
       case TO_RIGHT:
 	x += s * 1.7f;
 	break;
@@ -100,7 +100,7 @@
     int n = num;
     float x = lx;
     float ld;
-    switch (d) {
+    switch (d) { default: break;
     case TO_RIGHT:
       ld = 0;
       break;
@@ -116,7 +116,7 @@
     }
     for (;;) {
       drawLetter(n % 10, x, y, s, ld);
-      switch(d) {
+      switch(d) { default: break;
       case TO_RIGHT:
 	x -= s * 1.7f;
 	break;
@@ -147,7 +147,7 @@
 	n /= 6;
       }
       if ((i & 1) == 1 || i == 0) {
-	switch (i) {
+	switch (i) { default: break;
 	case 3:
 	  drawLetter(41, x + s * 1.16f, y, s);
 	  break;
--- a/src/abagames/p47/Lock.d
+++ b/src/abagames/p47/Lock.d
@@ -106,7 +106,7 @@
 	lockedPos.y = lockedEnemy.pos.y + lockedEnemy.type.batteryType[lockedPart].collisionPos.y;
       }
     }
-    switch (state) {
+    switch (state) { default: break;
     case LOCKING:
       if (cnt >= LOCK_CNT) {
 	state = LOCKED;
@@ -175,7 +175,7 @@
   }
 
   public override void draw() {
-    switch (state) {
+    switch (state) { default: break;
     case LOCKING:
       float y = lockedPos.y - (LOCK_CNT - cnt) * 0.5;
       float d = (LOCK_CNT - cnt) * 0.1;
--- a/src/abagames/p47/P47Boot.d
+++ b/src/abagames/p47/P47Boot.d
@@ -7,7 +7,8 @@
 
 private:
 import std.string;
-import std.c.stdlib;
+private import std.conv;
+import core.stdc.stdlib;
 import abagames.util.Logger;
 import abagames.util.sdl.Pad;
 import abagames.util.sdl.MainLoop;
@@ -28,12 +29,12 @@
 P47PrefManager prefManager;
 MainLoop mainLoop;
 
-private void usage(char[] args0) {
+private void usage(string args0) {
   Logger.error
     ("Usage: " ~ args0 ~ " [-brightness [0-100]] [-luminous [0-100]] [-nosound] [-window] [-fullscreen] [-reverse] [-lowres] [-slowship] [-nowait]");
 }
 
-private void parseArgs(char[][] args) {
+private void parseArgs(string[] args) {
   for (int i = 1; i < args.length; i++) {
     switch (args[i]) {
     case "-brightness":
@@ -42,7 +43,7 @@
 	throw new Exception("Invalid options");
       }
       i++;
-      float b = cast(float) atoi(args[i]) / 100;
+      float b = cast(float) to!int(args[i]) / 100;
       if (b < 0 || b > 1) {
 	usage(args[0]);
 	throw new Exception("Invalid options");
@@ -55,7 +56,7 @@
 	throw new Exception("Invalid options");
       }
       i++;
-      float l = cast(float) atoi(args[i]) / 100;
+      float l = cast(float) to!int(args[i]) / 100;
       if (l < 0 || l > 1) {
 	usage(args[0]);
 	throw new Exception("Invalid options");
@@ -93,7 +94,7 @@
   }
 }
 
-public int boot(char[][] args) {
+public int boot(string[] args) {
   screen = new P47Screen;
   pad = new Pad;
   try {
@@ -135,10 +136,10 @@
     _moduleCtor();
     char exe[4096];
     GetModuleFileNameA(null, exe, 4096);
-    char[][1] prog;
-    prog[0] = std.string.toString(exe);
-    result = boot(prog ~ std.string.split(std.string.toString(lpCmdLine)));
-  } catch (Object o) {
+    string[1] prog;
+    prog[0] = to!string(exe);
+    result = boot(prog ~ std.string.split(to!string(lpCmdLine)));
+  } catch (Throwable o) {
     //Logger.error("Exception: " ~ o.toString());
     Logger.info("Exception: " ~ o.toString());
     result = EXIT_FAILURE;
@@ -150,7 +151,7 @@
 } else {
 
 // Boot as the general executable.
-public int main(char[][] args) {
+public int main(string[] args) {
   return boot(args);
 }
 
--- a/src/abagames/p47/P47GameManager.d
+++ b/src/abagames/p47/P47GameManager.d
@@ -98,33 +98,33 @@
     Ship.createDisplayLists();
     ship = new Ship;
     ship.init(pad, field, this);
-    auto Particle particleClass = new Particle;
-    auto ParticleInitializer pi = new ParticleInitializer;
+    scope Particle particleClass = new Particle;
+    scope ParticleInitializer pi = new ParticleInitializer;
     particles = new LuminousActorPool(128, particleClass, pi);
-    auto Fragment fragmentClass = new Fragment;
-    auto FragmentInitializer fi = new FragmentInitializer;
+    scope Fragment fragmentClass = new Fragment;
+    scope FragmentInitializer fi = new FragmentInitializer;
     fragments = new LuminousActorPool(128, fragmentClass, fi);
     BulletActor.createDisplayLists();
-    auto BulletActorInitializer bi = new BulletActorInitializer(field, ship);
+    scope BulletActorInitializer bi = new BulletActorInitializer(field, ship);
     bullets = new BulletActorPool(512, bi);
     LetterRender.createDisplayLists();
-    auto Shot shotClass = new Shot;
-    auto ShotInitializer shi = new ShotInitializer(field);
+    scope Shot shotClass = new Shot;
+    scope ShotInitializer shi = new ShotInitializer(field);
     shots = new ActorPool(32, shotClass, shi);
-    auto Roll rollClass = new Roll;
-    auto RollInitializer ri = new RollInitializer(ship, field, this);
+    scope Roll rollClass = new Roll;
+    scope RollInitializer ri = new RollInitializer(ship, field, this);
     rolls = new ActorPool(4, rollClass, ri);
     Lock.init();
-    auto Lock lockClass = new Lock;
-    auto LockInitializer li = new LockInitializer(ship, field, this);
+    scope Lock lockClass = new Lock;
+    scope LockInitializer li = new LockInitializer(ship, field, this);
     locks = new ActorPool(4, lockClass, li);
-    auto Enemy enemyClass = new Enemy;
-    auto EnemyInitializer ei = new EnemyInitializer
+    scope Enemy enemyClass = new Enemy;
+    scope EnemyInitializer ei = new EnemyInitializer
       (field, bullets, shots, rolls, locks, ship, this);
     enemies = new ActorPool(ENEMY_MAX, enemyClass, ei);
     Bonus.init();
-    auto Bonus bonusClass = new Bonus;
-    auto BonusInitializer bni = new BonusInitializer(field, ship, this);
+    scope Bonus bonusClass = new Bonus;
+    scope BonusInitializer bni = new BonusInitializer(field, ship, this);
     bonuses = new ActorPool(128, bonusClass, bni);
     barrageManager = new BarrageManager;
     barrageManager.loadBulletMLs();
@@ -281,7 +281,7 @@
     this.parsecSlot = parsecSlot;
     this.mode = mode;
     int stageType = rand.nextInt(99999);
-    switch (difficulty) {
+    switch (difficulty) { default: break;
     case PRACTICE:
       stageManager.setRank(1, 4, startParsec, stageType);
       ship.setSpeedRate(0.7);
@@ -610,7 +610,7 @@
     drawBox(165, 6, bossShield, 6);
     int y = 24;
     for (int i = 0; i < BOSS_WING_NUM; i++) {
-      switch (i % 2) {
+      switch (i % 2) { default: break;
       case 0:
 	drawBox(165, y, bossWingShield[i], 6);
 	break;
--- a/src/abagames/p47/P47PrefManager.d
+++ b/src/abagames/p47/P47PrefManager.d
@@ -8,7 +8,8 @@
 private:
 import std.stream;
 import std.string;
-import std.c.stdlib;
+private import std.conv;
+import core.stdc.stdlib;
 import abagames.util.PrefManager;
 
 /**
@@ -18,7 +19,7 @@
  public:
   static const int PREV_VERSION_NUM = 10;
   static const int VERSION_NUM = 20;
-  static const char[] PREF_FILE = ".p47.prf";
+  static const string PREF_FILE = ".p47.prf";
   static const int MODE_NUM = 2;
   static const int DIFFICULTY_NUM = 4;
   static const int REACHED_PARSEC_SLOT_NUM = 10;
@@ -26,11 +27,11 @@
   int reachedParsec[MODE_NUM][DIFFICULTY_NUM];
   int selectedDifficulty, selectedParsecSlot, selectedMode;
 
-  public static char[] home_dir() {
-    char * home = getenv("HOME");
+  public static string home_dir() {
+    const(char)* home = getenv("HOME");
     if (home is null)
       throw new Error("HOME environment variable is not defined");
-    return std.string.toString(home);
+    return to!string(home);
   }
 
   private void init() {
@@ -58,8 +59,8 @@
     fd.read(selectedParsecSlot);
   }
 
-  public void load() {
-    auto File fd = new File;
+  public override void load() {
+    scope File fd = new File;
     try {
       int ver;
       fd.open(home_dir() ~ "/" ~ PREF_FILE);
@@ -90,8 +91,8 @@
     }
   }
 
-  public void save() {
-    auto File fd = new File;
+  public override void save() {
+    scope File fd = new File;
     fd.create(home_dir ~ "/" ~ PREF_FILE);
     fd.write(VERSION_NUM);
     for (int k = 0; k < MODE_NUM; k++) {
--- a/src/abagames/p47/P47Screen.d
+++ b/src/abagames/p47/P47Screen.d
@@ -17,7 +17,7 @@
  */
 public class P47Screen: Screen3D {
  public:
-  static const char[] CAPTION = "PARSEC47";
+  static const string CAPTION = "PARSEC47";
   static float luminous = 0;
  private:
   static Rand rand;
@@ -63,7 +63,7 @@
       luminousScreen.draw();
   }
 
-  public void resized(int width, int height) {
+  public override void resized(int width, int height) {
     if (luminousScreen)
       luminousScreen.resized(width, height);
     super.resized(width, height);
--- a/src/abagames/p47/Ship.d
+++ b/src/abagames/p47/Ship.d
@@ -27,10 +27,10 @@
   static bool isSlow = false;
   static int displayListIdx;
   Vector pos;
-  const float SIZE = 0.3;
+  static const float SIZE = 0.3;
   bool restart;
-  const int RESTART_CNT = 300;
-  const int INVINCIBLE_CNT = 228;
+  static const int RESTART_CNT = 300;
+  static const int INVINCIBLE_CNT = 228;
   int cnt;
  private:
   static Rand rand;
@@ -58,11 +58,8 @@
   int rollLockCnt;
   bool rollCharged;
 
-  public static this() {
-    rand = new Rand;
-  }
-
   public void init(Pad pad, Field field, P47GameManager manager) {
+    if (rand is null) rand = new Rand;
     this.pad = pad;
     this.field = field;
     this.manager = manager;
@@ -177,7 +174,7 @@
       pos.y = fieldLimitY;
     if (btn & Pad.PAD_BUTTON1) {
       float td;
-      switch (fireCnt % 4) {
+      switch (fireCnt % 4) { default: break;
       case 0:
 	firePos.x = pos.x + TURRET_INTERVAL_LENGTH;
 	firePos.y = pos.y;
--- a/src/abagames/p47/SoundManager.d
+++ b/src/abagames/p47/SoundManager.d
@@ -26,9 +26,9 @@
   Sound bgm[BGM_NUM];
   Sound se[SE_NUM];
 
-  const char[][] bgmFileName = 
+  const string[] bgmFileName = 
     ["ptn0.ogg", "ptn1.ogg", "ptn2.ogg", "ptn3.ogg"];
-  const char[][] seFileName = 
+  const string[] seFileName = 
     ["shot.wav", "rollchg.wav", "rollrls.wav", "shipdst.wav", "getbonus.wav", "extend.wav",
     "enemydst.wav", "largedst.wav", "bossdst.wav", "lock.wav", "laser.wav"];
   const int[] seChannel = 
--- a/src/abagames/p47/StageManager.d
+++ b/src/abagames/p47/StageManager.d
@@ -104,7 +104,7 @@
   }
 
   private void setAppearancePattern(EnemyAppearance* ap) {
-    switch (rand.nextInt(5)) {
+    switch (rand.nextInt(5)) { default: break;
     case 0:
       ap.pattern = ONE_SIDE;
       break;
@@ -117,7 +117,7 @@
       ap.pattern = BOTH_SIDES;
       break;
     }
-    switch (rand.nextInt(3)) {
+    switch (rand.nextInt(3)) { default: break;
     case 0:
       ap.sequence = RANDOM;
       break;
@@ -142,7 +142,7 @@
     setAppearancePattern(ap);
     if (ap.pattern == ONE_SIDE)
       ap.pattern = ALTERNATE;
-    switch (rand.nextInt(4)) {
+    switch (rand.nextInt(4)) { default: break;
     case 0:
       ap.num = 7 + rand.nextInt(5);
       ap.groupInterval = 72 + rand.nextInt(15);
@@ -177,7 +177,7 @@
     mt = BarrageManager.MIDDLEMOVE;
     ap.moveParser = barrageManager.parser[mt][rand.nextInt(barrageManager.parserNum[mt])];
     setAppearancePattern(ap);
-    switch (rand.nextInt(3)) {
+    switch (rand.nextInt(3)) { default: break;
     case 0:
       ap.num = 4;
       ap.groupInterval = 240 + rand.nextInt(150);
@@ -203,7 +203,7 @@
     mt = BarrageManager.LARGEMOVE;
     ap.moveParser = barrageManager.parser[mt][rand.nextInt(barrageManager.parserNum[mt])];
     setAppearancePattern(ap);
-    switch (rand.nextInt(3)) {
+    switch (rand.nextInt(3)) { default: break;
     case 0:
       ap.num = 3;
       ap.groupInterval = 400 + rand.nextInt(100);
@@ -223,7 +223,7 @@
   }
 
   private void setAppearance(EnemyAppearance* ap, int type) {
-    switch (type) {
+    switch (type) { default: break;
     case SMALL:
       setSmallAppearance(ap);
       break;
@@ -255,7 +255,7 @@
     field.aimSpeed = 0.1 + section * 0.02;
     if (section == 4) {
       // Set the middle boss.
-      auto Vector pos = new Vector;
+      scope Vector pos = new Vector;
       pos.x = 0; pos.y = field.size.y / 4 * 3;
       gameManager.addBoss(pos, std.math.PI, middleBossType);
       bossSection = true;
@@ -264,7 +264,7 @@
       return;
     } else if (section == 9) {
       // Set the large boss.
-      auto Vector pos = new Vector;
+      scope Vector pos = new Vector;
       pos.x = 0; pos.y = field.size.y / 4 * 3;
       gameManager.addBoss(pos, std.math.PI, largeBossType);
       bossSection = true;
@@ -295,16 +295,16 @@
     else if (middleRushSection)
       ap = MIDDLE_RUSH_SECTION_PATTERN;
     for (int i = 0; i < apparancePattern[gameManager.mode][ap][0]; i++, apNum++) {
-      EnemyAppearance* ap = &(appearance[apNum]);
-      setAppearance(ap, SMALL);
+      EnemyAppearance* eap = &(appearance[apNum]);
+      setAppearance(eap, SMALL);
     }
     for (int i = 0; i < apparancePattern[gameManager.mode][ap][1]; i++, apNum++) {
-      EnemyAppearance* ap = &(appearance[apNum]);
-      setAppearance(ap, MIDDLE);
+      EnemyAppearance* eap = &(appearance[apNum]);
+      setAppearance(eap, MIDDLE);
     }
     for (int i = 0; i < apparancePattern[gameManager.mode][ap][2]; i++, apNum++) {
-      EnemyAppearance* ap = &(appearance[apNum]);
-      setAppearance(ap, LARGE);
+      EnemyAppearance* eap = &(appearance[apNum]);
+      setAppearance(eap, LARGE);
     }
   }
 
@@ -364,7 +364,7 @@
 	continue;
       }
       float p;
-      switch (ap.sequence) {
+      switch (ap.sequence) { default: break;
       case RANDOM:
 	p = rand.nextFloat(1);
 	break;
@@ -373,7 +373,7 @@
 	break;
       }
       float d;
-      switch (ap.point) {
+      switch (ap.point) { default: break;
       case TOP:
 	switch (ap.pattern) {
 	case BOTH_SIDES:
--- a/src/abagames/p47/Title.d
+++ b/src/abagames/p47/Title.d
@@ -153,9 +153,9 @@
   }
 
   private const int BOX_SMALL_SIZE = 24;
-  private const char[][] DIFFICULTY_SHORT_STR = ["P", "N", "H", "E", "Q"];
-  private const char[][] DIFFICULTY_STR = ["PRACTICE", "NORMAL", "HARD", "EXTREME", "QUIT"];
-  private const char[][] MODE_STR = ["ROLL", "LOCK"];
+  private const string[] DIFFICULTY_SHORT_STR = ["P", "N", "H", "E", "Q"];
+  private const string[] DIFFICULTY_STR = ["PRACTICE", "NORMAL", "HARD", "EXTREME", "QUIT"];
+  private const string[] MODE_STR = ["ROLL", "LOCK"];
 
   private void drawTitleBoard() {
     glEnable(GL_TEXTURE_2D);
--- a/src/abagames/util/ActorPool.d
+++ b/src/abagames/util/ActorPool.d
@@ -16,7 +16,7 @@
  public:
   Actor[] actor;
  protected:
-  int actorIdx;
+  ptrdiff_t actorIdx;
 
   public this(int n, Actor act, ActorInitializer ini) {
     actor = new Actor[n];
--- a/src/abagames/util/Logger.d
+++ b/src/abagames/util/Logger.d
@@ -6,7 +6,8 @@
 module abagames.util.Logger;
 
 private:
-import std.stream;
+import std.stdio;
+import std.conv;
 
 /**
  * Logger(error/info).
@@ -14,35 +15,32 @@
 version(Win32_release) {
 
 import std.string;
+private import std.conv;
 import std.c.windows.windows;
 
 public class Logger {
 
-  public static void info(char[] msg) {
+  public static void info(string msg) {
     // Win32 exe file crashes if it writes something to stderr.
-    //stderr.writeLine("Info: " ~ msg);
+    //stderr.writeln("Info: " ~ msg);
   }
 
   public static void info(int n) {
     /*if (n >= 0)
-      stderr.writeLine("Info: " ~ std.string.toString(n));
+      stderr.writeln("Info: " ~ to!string(n));
     else
-    stderr.writeLine("Info: -" ~ std.string.toString(-n));*/
+    stderr.writeln("Info: -" ~ to!string(-n));*/
   }
 
-  private static void putMessage(char[] msg) {
+  private static void putMessage(string msg) {
     MessageBoxA(null, std.string.toStringz(msg), "Error", MB_OK | MB_ICONEXCLAMATION);
   }
 
-  public static void error(char[] msg) {
+  public static void error(string msg) {
     putMessage("Error: " ~ msg);
   }
 
-  public static void error(Exception e) {
-    putMessage("Error: " ~ e.toString());
-  }
-
-  public static void error(Error e) {
+  public static void error(Throwable e) {
     putMessage("Error: " ~ e.toString());
   }
 }
@@ -51,27 +49,23 @@
 
 public class Logger {
 
-  public static void info(char[] msg) {
-    stderr.writeLine("Info: " ~ msg);
+  public static void info(string msg) {
+    stderr.writeln("Info: " ~ msg);
   }
 
   public static void info(int n) {
     if (n >= 0)
-      stderr.writeLine("Info: " ~ std.string.toString(n));
+      stderr.writeln("Info: " ~ to!string(n));
     else
-      stderr.writeLine("Info: -" ~ std.string.toString(-n));
-  }
-
-  public static void error(char[] msg) {
-    stderr.writeLine("Error: " ~ msg);
+      stderr.writeln("Info: -" ~ to!string(-n));
   }
 
-  public static void error(Exception e) {
-    stderr.writeLine("Error: " ~ e.toString());
+  public static void error(string msg) {
+    stderr.writeln("Error: " ~ msg);
   }
 
-  public static void error(Error e) {
-    stderr.writeLine("Error: " ~ e.toString());
+  public static void error(Throwable e) {
+    stderr.writeln("Error: " ~ e.toString());
     if (e.next)
       error(e.next);
   }
--- a/src/abagames/util/Rand.d
+++ b/src/abagames/util/Rand.d
@@ -6,7 +6,7 @@
 module abagames.util.Rand;
 
 private:
-import std.date;
+import std.datetime;
 import mt;
 
 /**
@@ -15,12 +15,12 @@
 public class Rand {
   
   public this() {
-    d_time timer = getUTCtime();
-    init_genrand(timer);
+    long timer = Clock.currStdTime();
+    init_genrand(cast(uint)timer);
   }
 
   public void setSeed(long n) {
-    init_genrand(n);
+    init_genrand(cast(uint)n);
   }
 
   public int nextInt(int n) {
--- a/src/abagames/util/sdl/MainLoop.d
+++ b/src/abagames/util/sdl/MainLoop.d
@@ -91,7 +91,7 @@
       frame = cast(int) (nowTick-prvTickCount) / interval;
       if (frame <= 0) {
 	frame = 1;
-	SDL_Delay(prvTickCount+interval-nowTick);
+	SDL_Delay(cast(uint)(prvTickCount+interval-nowTick));
 	if (accframe) {
 	  prvTickCount = SDL_GetTicks();
 	} else {
--- a/src/abagames/util/sdl/Pad.d
+++ b/src/abagames/util/sdl/Pad.d
@@ -7,6 +7,7 @@
 
 private:
 import std.string;
+private import std.conv;
 import SDL;
 import abagames.util.sdl.Input;
 import abagames.util.sdl.SDLInitFailedException;
@@ -32,12 +33,12 @@
   public void openJoystick() {
     if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) < 0) {
       throw new SDLInitFailedException(
-	"Unable to init SDL joystick: " ~ std.string.toString(SDL_GetError()));
+	"Unable to init SDL joystick: " ~ to!string(SDL_GetError()));
     }
     stick = SDL_JoystickOpen(0);
   }
 
-  public void handleEvent(SDL_Event *event) {
+  public override void handleEvent(SDL_Event *event) {
     keys = SDL_GetKeyState(null);
   }
   
--- a/src/abagames/util/sdl/SDLInitFailedException.d
+++ b/src/abagames/util/sdl/SDLInitFailedException.d
@@ -9,7 +9,7 @@
  * SDL initialize failed.
  */
 public class SDLInitFailedException: Exception {
-  public this(char[] msg) {
+  public this(string msg) {
     super(msg);
   }
 }
--- a/src/abagames/util/sdl/Screen3D.d
+++ b/src/abagames/util/sdl/Screen3D.d
@@ -7,6 +7,7 @@
 
 private:
 import std.string;
+private import std.conv;
 import SDL;
 import opengl;
 import abagames.util.Logger;
@@ -41,7 +42,7 @@
     // Initialize SDL.
     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
       throw new SDLInitFailedException(
-	"Unable to initialize SDL: " ~ std.string.toString(SDL_GetError()));
+	"Unable to initialize SDL: " ~ to!string(SDL_GetError()));
     }
     // Create an OpenGL screen.
     if (windowMode) {
@@ -51,7 +52,7 @@
     } 
     if (SDL_SetVideoMode(width, height, 0, videoFlags) == null) {
       throw new SDLInitFailedException
-	("Unable to create SDL screen: " ~ std.string.toString(SDL_GetError()));
+	("Unable to create SDL screen: " ~ to!string(SDL_GetError()));
     }
     glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
     resized(width, height);
@@ -64,7 +65,7 @@
   private void screenResized() {
     if (SDL_SetVideoMode(width, height, 0, videoFlags) == null) {
       throw new Exception
-        ("Unable to resize SDL screen: " ~ std.string.toString(SDL_GetError()));
+        ("Unable to resize SDL screen: " ~ to!string(SDL_GetError()));
     }
 
     glViewport(0, 0, width, height);
@@ -105,7 +106,7 @@
     throw new Exception("OpenGL error");
   }
 
-  protected void setCaption(char[] name) {
+  protected void setCaption(string name) {
     SDL_WM_SetCaption(std.string.toStringz(name), null);
   }
 
--- a/src/abagames/util/sdl/Sound.d
+++ b/src/abagames/util/sdl/Sound.d
@@ -7,6 +7,7 @@
 
 private:
 import std.string;
+private import std.conv;
 import SDL;
 import SDL_mixer;
 import abagames.util.sdl.SDLInitFailedException;
@@ -18,8 +19,8 @@
  public:
   static bool noSound = false;
   static int fadeOutSpeed = 1280;
-  static char[] soundsDir = "/usr/share/games/parsec47/sounds/";
-  static char[] chunksDir = "/usr/share/games/parsec47/sounds/";
+  static string soundsDir = "/usr/share/games/parsec47/sounds/";
+  static string chunksDir = "/usr/share/games/parsec47/sounds/";
 
   public static void init() {
     if (noSound) return;
@@ -32,7 +33,7 @@
     if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
       noSound = 1;
       throw new SDLInitFailedException
-	("Unable to initialize SDL_AUDIO: " ~ std.string.toString(SDL_GetError()));
+	("Unable to initialize SDL_AUDIO: " ~ to!string(SDL_GetError()));
     }
 
     audio_rate = 44100;
@@ -42,7 +43,7 @@
     if (Mix_OpenAudio(audio_rate, audio_format, audio_channels, audio_buffers) < 0) {
       noSound = 1;
       throw new SDLInitFailedException
-	("Couldn't open audio: " ~ std.string.toString(SDL_GetError()));
+	("Couldn't open audio: " ~ to!string(SDL_GetError()));
     }
     Mix_QuerySpec(&audio_rate, &audio_format, &audio_channels);
   }
@@ -64,25 +65,25 @@
 
   // Load a sound or a chunk.
 
-  public void loadSound(char[] name) {
+  public void loadSound(string name) {
     if (noSound) return;
-    char[] fileName = soundsDir ~ name;
+    string fileName = soundsDir ~ name;
     music = Mix_LoadMUS(std.string.toStringz(fileName));
     if (!music) {
       noSound = true;
       throw new SDLInitFailedException("Couldn't load: " ~ fileName ~ 
-				       " (" ~ std.string.toString(Mix_GetError()) ~ ")");
+				       " (" ~ to!string(Mix_GetError()) ~ ")");
     }
   }
   
-  public void loadChunk(char[] name, int ch) {
+  public void loadChunk(string name, int ch) {
     if (noSound) return;
-    char[] fileName = chunksDir ~ name;
+    string fileName = chunksDir ~ name;
     chunk = Mix_LoadWAV(std.string.toStringz(fileName));
     if (!chunk) {
       noSound = true;
       throw new SDLInitFailedException("Couldn't load: " ~ fileName ~ 
-				       " (" ~ std.string.toString(Mix_GetError()) ~ ")");
+				       " (" ~ to!string(Mix_GetError()) ~ ")");
     }
     chunkChannel = ch;
   }
--- a/src/abagames/util/sdl/Texture.d
+++ b/src/abagames/util/sdl/Texture.d
@@ -16,13 +16,13 @@
  */
 public class Texture {
  public:
-  static char[] imagesDir = "/usr/share/games/parsec47/images/";
+  static string imagesDir = "/usr/share/games/parsec47/images/";
 
  private:
   GLuint num;
 
-  public this(char[] name) {
-    char[] fileName = imagesDir ~ name;
+  public this(string name) {
+    string fileName = imagesDir ~ name;
     SDL_Surface *surface;    
     surface = SDL_LoadBMP(std.string.toStringz(fileName));
     if (!surface) {
--- a/src/dirent.d
+++ b/src/dirent.d
@@ -3,8 +3,8 @@
 extern (C) {
 	alias void DIR;
 	alias void dirent;
-	DIR* opendir(char* name);
+	DIR* opendir(const(char)* name);
 	dirent* readdir(DIR* dir);
 	int closedir(DIR* dir);
-	char* readdir_filename(DIR* ent);
+	const(char)* readdir_filename(DIR* ent);
 }
--- a/src/mt.d
+++ b/src/mt.d
@@ -5,7 +5,7 @@
      Matthe Bellew, and Isaku Wada
    Andrew C. Edwards  v0.1  30 September 2003  edwardsac@ieee.org
 
-   Before using, initialize the state by using init_genrand(seed) 
+   Before using, initialize the state by using init_genrand(cast(uint)seed) 
    or init_by_array(init_key, key_length).
 
    Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
@@ -48,8 +48,7 @@
    Please CC: edwardsac@ieee.org on all correspondence
 */
 
-module MersenneTwister;
-import std.stream;
+module mt;
 
 /* Period parameters */  
 const int N = 624;
@@ -70,7 +69,7 @@
 {
     state[0]= s & 0xffffffffUL;
     for (int j=1; j<N; j++) {
-        state[j] = (1812433253UL * (state[j-1] ^ (state[j-1] >> 30)) + j); 
+        state[j] = (1812433253U * (state[j-1] ^ (state[j-1] >> 30)) + j); 
         /* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
         /* In the previous versions, MSBs of the seed affect   */
         /* only MSBs of the array state[].                        */
@@ -88,11 +87,11 @@
 void init_by_array(uint init_key[], uint key_length)
 {
     int i, j, k;
-    init_genrand(19650218UL);
+    init_genrand(cast(uint)19650218UL);
     i=1; j=0;
     k = (N>key_length ? N : key_length);
     for (; k; k--) {
-        state[i] = (state[i] ^ ((state[i-1] ^ (state[i-1] >> 30)) * 1664525UL))
+        state[i] = (state[i] ^ ((state[i-1] ^ (state[i-1] >> 30)) * 1664525U))
           + init_key[j] + j; /* non linear */
         state[i] &= 0xffffffffUL; /* for WORDSIZE > 32 machines */
         i++; j++;
@@ -100,7 +99,7 @@
         if (j>=key_length) j=0;
     }
     for (k=N-1; k; k--) {
-        state[i] = (state[i] ^ ((state[i-1] ^ (state[i-1] >> 30)) * 1566083941UL))
+        state[i] = (state[i] ^ ((state[i-1] ^ (state[i-1] >> 30)) * 1566083941U))
           - i; /* non linear */
         state[i] &= 0xffffffffUL; /* for WORDSIZE > 32 machines */
         i++;
@@ -113,14 +112,14 @@
 
 static void next_state()
 {
-    uint *p=state;
+    uint *p=state.ptr;
 
-    /* if init_genrand() has not been called, */
+    /* if init_genrand(cast(uint)) has not been called, */
     /* a default initial seed is used         */
-    if (initf==0) init_genrand(5489UL);
+    if (initf==0) init_genrand(cast(uint)5489UL);
 
     left = N;
-    next = state;
+    next = state.ptr;
     
     for (int j=N-M+1; --j; p++) 
         *p = p[M] ^ TWIST(p[0], p[1]);
@@ -233,7 +232,7 @@
     uint length=4;
     init_by_array(init, length);
     /* This is an example of initializing by an array.       */
-    /* You may use init_genrand(seed) with any 32bit integer */
+    /* You may use init_genrand(cast(uint)seed) with any 32bit integer */
     /* as a seed for a simpler initialization                */
     printf("1000 outputs of genrand_int32()\n");
     for (int i=0; i<1000; i++) {
--- a/src/abagames/p47/Enemy.d
+++ b/src/abagames/p47/Enemy.d
@@ -79,15 +79,12 @@
   bool damaged;
   int bossTimer;
   
-  public static this() {
-    rand = new Rand;
-  }
-
   public override Actor newActor() {
     return new Enemy;
   }
 
   public override void init(ActorInitializer ini) {
+    if (rand is null) rand = new Rand;
     EnemyInitializer ei = cast(EnemyInitializer) ini;
     field = ei.field;
     bullets = ei.bullets;
@@ -410,7 +407,7 @@
 	Roll rl = cast(Roll) rolls.actor[i];
 	ch = checkHit(rl.pos[0], 1.0, 1.0);
 	if (ch >= HIT) {
-	  for (int i = 0; i < 4; i++)
+	  for (int ii = 0; ii < 4; ii++)
 	    manager.addParticle(rl.pos[0], rand.nextFloat(std.math.PI * 2), 0, Shot.SPEED / 10);
 	  float rd = ROLL_DAMAGE;
 	  if (rl.released) {
@@ -442,7 +439,7 @@
 	} else if (lk.state == Lock.FIRED && lk.lockedEnemy == this) {
 	  ch = checkHit(lk.pos[0], 1.5, 1.5);
 	  if (ch >= HIT && ch == lk.lockedPart) {
-	    for (int i = 0; i < 4; i++)
+	    for (int ii = 0; ii < 4; ii++)
 	      manager.addParticle(lk.pos[0], rand.nextFloat(std.math.PI * 2), 0, Shot.SPEED / 10);
 	    if (ch == HIT)
 	      addDamage(LOCK_DAMAGE);
@@ -694,21 +691,21 @@
 	P47Screen.drawLineRetro(pos.x + bt.wingShapePos[0].x, pos.y + bt.wingShapePos[0].y,
 				pos.x + bt.wingShapePos[1].x, pos.y + bt.wingShapePos[1].y);
       } else {
-	for (int i = 0; i < BatteryType.WING_SHAPE_POINT_NUM; i++, ni++) {
+	for (int ii = 0; ii < BatteryType.WING_SHAPE_POINT_NUM; ii++, ni++) {
 	  if (ni >= BatteryType.WING_SHAPE_POINT_NUM)
 	    ni = 0;
-	  P47Screen.drawLineRetro(pos.x + bt.wingShapePos[i].x, pos.y + bt.wingShapePos[i].y,
+	  P47Screen.drawLineRetro(pos.x + bt.wingShapePos[ii].x, pos.y + bt.wingShapePos[ii].y,
 				  pos.x + bt.wingShapePos[ni].x, pos.y + bt.wingShapePos[ni].y);
 	}
 	if (type.type != EnemyType.SMALL) {
 	  glBegin(GL_TRIANGLE_FAN);
 	  Screen3D.setColor
 	    (P47Screen.retroR, P47Screen.retroG, P47Screen.retroB, P47Screen.retroA);
-	  for (int i = 0; i < BatteryType.WING_SHAPE_POINT_NUM; i++) {
-	    if (i == 2)
+	  for (int ii = 0; ii < BatteryType.WING_SHAPE_POINT_NUM; ii++) {
+	    if (ii == 2)
 	      Screen3D.setColor
 		(P47Screen.retroR, P47Screen.retroG, P47Screen.retroB, 0);
-	    glVertex3f(pos.x + bt.wingShapePos[i].x, pos.y + bt.wingShapePos[i].y, z);
+	    glVertex3f(pos.x + bt.wingShapePos[ii].x, pos.y + bt.wingShapePos[ii].y, z);
 	  }
 	  glEnd();
 	}
--- a/src/abagames/p47/Fragment.d
+++ b/src/abagames/p47/Fragment.d
@@ -34,15 +34,12 @@
   float retro;
   int cnt;
 
-  public static this() {
-    rand = new Rand;
-  }
-
   public override Actor newActor() {
     return new Fragment;
   }
 
   public override void init(ActorInitializer ini) {
+    if (rand is null) rand = new Rand;
     FragmentInitializer fi = cast(FragmentInitializer) ini;
     for (int i = 0; i < POINT_NUM; i++) {
       pos[i] = new Vector;
--- a/src/abagames/p47/LuminousScreen.d
+++ b/src/abagames/p47/LuminousScreen.d
@@ -25,9 +25,9 @@
   float luminous;
 
   private void makeLuminousTexture() {
-    uint *data = td;
+    uint *data = td.ptr;
     int i;
-    memset(data, 0, luminousTextureWidth * luminousTextureHeight * 4 * uint.sizeof);
+    td[] = 0;
     glGenTextures(1, &luminousTexture);
     glBindTexture(GL_TEXTURE_2D, luminousTexture);
     glTexImage2D(GL_TEXTURE_2D, 0, 4, luminousTextureWidth, luminousTextureHeight, 0,
--- a/src/abagames/p47/Particle.d
+++ b/src/abagames/p47/Particle.d
@@ -30,15 +30,12 @@
   float lumAlp;
   int cnt;
 
-  public static this() {
-    rand = new Rand;
-  }
-
   public override Actor newActor() {
     return new Particle;
   }
 
   public override void init(ActorInitializer ini) {
+    if (rand is null) rand = new Rand;
     pos = new Vector;
     ppos = new Vector;
     vel = new Vector;
--- a/src/abagames/p47/Shot.d
+++ b/src/abagames/p47/Shot.d
@@ -20,7 +20,7 @@
 public class Shot: Actor {
  public:
   Vector pos;
-  const float SPEED = 1;
+  static const float SPEED = 1;
  private:
   static const float FIELD_SPACE = 1;
   static int displayListIdx;