fish

1 files changed, 167 insertions, 0 deletions

diff --git a/map.c b/map.c
new file mode 100644
index 0000000..d3bd341
--- /dev/null
+++ b/map.c
@@ -0,0 +1,167 @@
+#include "project.h"
+
+#ifdef MAP_NULL
+
+void
+map_output (int *computer, int *x, int *y)
+{
+}
+
+#elif defined(MAP_HOME)
+
+void
+map_output (int *computer, int *x, int *y)
+{
+
+  switch (*computer)
+    {
+    case 1:
+      *computer = 5;
+      break;
+    case 2:
+      *computer = 4;
+      break;
+    case 3:
+      *computer = 0;
+      if (x)
+        *x = *x / 2;
+      break;
+    case 4:
+      *computer = 0;
+      if (x)
+        *x = (*x / 2) + 1024;
+      break;
+    case 5:
+    case 6:
+    case 7:
+      (*computer) -= 4;
+      break;
+    }
+}
+
+#endif
+
+int
+map_grace_left (int computer)
+{
+  int console = layout_computer_to_console (computer);
+  int cl = layout_console_to_computer (console - 1);
+
+  if ((cl < 1) || (cl > N_COMPUTER))
+    return 1;
+
+  map_output (&computer, NULL, NULL);
+  map_output (&cl, NULL, NULL);
+
+  return cl != computer;
+}
+
+int
+map_grace_right (int computer)
+{
+  int console = layout_computer_to_console (computer);
+  int cl = layout_console_to_computer (console + 1);
+  if ((cl < 1) || (cl > N_COMPUTER))
+    return 1;
+
+  map_output (&computer, NULL, NULL);
+  map_output (&cl, NULL, NULL);
+
+  return cl != computer;
+}
+
+int
+map_switch_left (int *cc)
+{
+  int computer;
+  int console;
+  int ok;
+
+  for (computer = *cc - 1; computer > 0; computer--)
+    {
+
+/* First see if this computer is being displayed  - if so easy*/
+
+      if (layout_computer_to_console (computer) > 0)
+        {
+          *cc = computer;
+          layout_status (*cc);
+          return 1;
+        }
+
+/* We're switching left so try console from the left to the right */
+      ok = 0;
+
+      for (console = 1; console <= N_CONSOLE; ++console)
+        {
+          if (layout_possible (console, computer))
+            {
+              layout_map (console, computer);
+              if (!ok)
+                *cc = computer;
+              computer++;
+              ok++;
+            }
+        }
+      if (ok)
+        {
+          layout_status (*cc);
+          return 1;
+        }
+    }
+
+
+  return 0;
+}
+
+int
+map_switch_right (int *cc)
+{
+  int computer;
+  int console;
+  int ok;
+
+
+  for (computer = *cc + 1; computer <= N_COMPUTER; computer++)
+    {
+
+/* First see if this computer is being displayed  - if so easy*/
+
+      if (layout_computer_to_console (computer) > 0)
+        {
+          *cc = computer;
+          layout_status (*cc);
+          return 1;
+        }
+
+/* We're switching right so try console from the left to the right */
+      ok = 0;
+
+      for (console = N_CONSOLE; console > 0; --console)
+        {
+          if (layout_possible (console, computer))
+            {
+              layout_map (console, computer);
+              if (!ok)
+                *cc = computer;
+
+              computer--;
+              ok++;
+            }
+        }
+      if (ok)
+        {
+          layout_status (*cc);
+          return 1;
+        }
+    }
+
+
+  return 0;
+}
+
+int
+map_init (void)
+{
+  return layout_init ();
+}