Beginnings of the server

src/server.c

@@ -0,0 +1,154 @@
+
+#define NONE 0 
+#define PHARAO 1
+#define DJHED  2
+#define PYRAMID 3
+#define OBELISK 4
+#define OBELISK2 5
+
+
+#define F_ROTATE 1
+#define F_SPLIT 2
+
+struct square {
+  int piece : 4;
+  int side : 1;
+  int dir : 2;
+} board[10][8];
+
+
+/*
+struct pieceinfo {
+  char ascii[];
+} pieceinfo[] = {
+  { //NONE
+    .ascii = { ' ' } }
+  { //PHARAO
+    .ascii = { '=' } }
+  { //DJHED
+    .ascii = { '/', '\\' } }
+  { //PYRAMID
+    .ascii = { 'd', 'b', 'p', 'q' } }
+  { //OBELISK
+    .ascii = { 'o' } }
+  { //OBELISK2
+    .ascii = { '@' } }
+};
+*/
+
+/*
+void
+print_board() {
+  for (int y=0; y<8; y++)
+    for (int x=0; x<10; x++)
+      ;
+}
+*/
+
+int
+laser(int side) {
+  int x, y, dir;
+  int ddir;
+  switch (side) {
+  case 0:
+    x=9; y=-1; dir=0;
+    break;
+  case 1:
+    x=0; y=8; dir=2; 
+    break;
+  default:
+    return 0;
+  }
+  
+  for (;;) {
+    switch (dir & 3) {
+    case 0: y++; if (y>7) return 0; break;
+    case 1: x++; if (x>9) return 0; break;
+    case 2: y--; if (y<0) return 0; break;
+    case 3: x--; if (x<0) return 0; break;
+    }
+    switch (board[x][y].piece) {
+    case NONE:
+      break;
+    case PHARAO:
+      return 2 + board[x][y].side; /* GAME OVER */
+    case OBELISK2:
+      board[x][y].piece = OBELISK;
+      return 1;
+    case OBELISK:
+      board[x][y].piece = NONE;
+      return 1;
+    case DJHED:
+      ddir = board[x][y].dir - dir;
+      dir=(dir + 1 - 2*(ddir & 1)) & 3;
+      break;
+    case PYRAMID:
+      ddir = board[x][y].dir - dir;
+      if (ddir & 2) {
+	board[x][y].piece = NONE;
+	return 1;
+      }
+      dir=(dir + 1 - 2*(ddir & 1)) & 3;
+      break;
+    }
+  }
+}
+
+int
+move(int side, int x, int y, int dir, int flags) {
+  if ((x<0) || (x>9) || (y<0) || (y>7))
+    return 0;
+  if (!board[x][y].piece)
+    return 0;
+  if ((board[x][y].side != side))
+    return 0;
+
+  if (flags & F_ROTATE) {
+    if ( !((dir==1) || (dir==-1)))
+      return 0;
+    board[x][y].dir = (board[x][y].dir + dir) & 3;
+    return 1;
+  }
+  
+  /* dir =
+    0 1 2
+    7 X 3
+    6 5 4
+  */
+
+  if ((dir<0) || (dir>7))
+    return 0;
+  int ny = y - (dir<3) + ((dir>3) && (dir<7));
+  int nx = x + ((dir>1) && (dir<5)) - ((dir<1) || (dir>5));
+  if ((nx<0) || (nx>9) || (ny<0) || (ny>7))
+    return 0;
+  
+
+  if (flags = F_SPLIT) {
+    if (board[nx][ny].piece || (board[x][y].piece != OBELISK2))
+      return 0;
+    board[x][y].piece = OBELISK;
+    board[nx][ny].piece = OBELISK;
+    board[nx][ny].side = board[x][y].side;
+    return 1;
+  }
+  
+  if (board[nx][ny].piece &&
+      !((board[x][y].piece == DJHED) &&
+	((board[nx][ny].piece != DJHED) &&
+	 (board[nx][ny].piece != PHARAO))))
+    return 0;
+
+  struct square tmp;
+  tmp = board[nx][ny];
+  board[nx][ny] = board[x][y];
+  board[x][y] = tmp;
+  
+  return 1;
+}
+
+
+int
+main() {
+  
+}