* src/main.c (main): call init_window_stuff(). Remove call to init_numbers().

(clean_up): call free_window_stuff(). Remove call to free_numbers().

* src/list.h (free_window_stuff): new prototype
(init_window_stuff): likewise

* src/list.c (rp_window_numset): new global
(init_window_stuff): new function
(free_window_stuff): new function

* src/data.h (rp_window_numset): new extern

* src/number.c (numset_init): new function
(number_is_taken): rename to numset_num_is_taken, callers updated.
(find_empty_cell): rename to numset_find_empty_cell, callers updated.
(add_window_number): rename to numset_add_num, callers updated.
(return_window_number): rename to numset_release, callers updated.
(init_numbers): remove function
(free_numbers): rename to numset_free, callers updated.
(numset_num_is_taken): take struct numset* as an argument.
(numset_find_empty_cell): likewise
(numset_add_num): likewise
(numset_request): likewise
(numset_release): likewise
(numset_free): likewise
(numset_new): new function

8 files changed, 88 insertions, 51 deletions

diff --git a/src/actions.c b/src/actions.c
index 28a583e..e655341 100644
--- a/src/actions.c
+++ b/src/actions.c
@@ -1175,11 +1175,11 @@ cmd_number (int interactive, void *data)
 	}
       else
 	{
-	  return_window_number (win->number);
+	  numset_release (rp_window_numset, win->number);
 	}
 
       win->number = new_number;
-      add_window_number (new_number);
+      numset_add_num (rp_window_numset, new_number);
 
       /* resort the the window in the list */
       list_del (&win->node);
@@ -2788,7 +2788,7 @@ cmd_tmpwm (int interactive, void *data)
       if (frame == win->scr->rp_current_frame) set_active_frame (frame);
 
       /* put the window in the unmapped list. */
-      return_window_number (win->number);
+      numset_release (rp_window_numset, win->number);
       list_move_tail(&win->node, &rp_unmapped_window);
     }
 
diff --git a/src/data.h b/src/data.h
index 235517b..2164b5a 100644
--- a/src/data.h
+++ b/src/data.h
@@ -276,4 +276,7 @@ extern int rp_honour_normal_map;
 /* Keep track of X11 error messages. */
 extern char *rp_error_msg;
 
+/* Number sets for windows. */
+extern struct numset *rp_window_numset;
+
 #endif /* _RATPOISON_DATA_H */
diff --git a/src/list.c b/src/list.c
index 12d51c8..87ad967 100644
--- a/src/list.c
+++ b/src/list.c
@@ -29,6 +29,8 @@
 LIST_HEAD(rp_unmapped_window);
 LIST_HEAD(rp_mapped_window);
 
+struct numset *rp_window_numset;
+
 /* Get the mouse position relative to the root of the specified window */
 static void
 get_mouse_root_position (rp_window *win, int *mouse_x, int *mouse_y)
@@ -669,3 +671,15 @@ get_window_list (char *fmt, char *delim, struct sbuf *buffer,
       sbuf_copy (buffer, MESSAGE_NO_MANAGED_WINDOWS);
     }
 }
+
+void
+init_window_stuff ()
+{
+  rp_window_numset = numset_new ();
+}
+
+void
+free_window_stuff ()
+{
+  numset_free (rp_window_numset);
+}
diff --git a/src/list.h b/src/list.h
index bc3314f..f15c26b 100644
--- a/src/list.h
+++ b/src/list.h
@@ -60,5 +60,7 @@ void insert_into_list (rp_window *win, struct list_head *list);
 void print_window_information (rp_window *win);
 void get_window_list (char *fmt, char *delim, struct sbuf *buffer, 
 		      int *mark_start, int *mark_end);
+void init_window_stuff ();
+void free_window_stuff ();
 
 #endif /* ! _RATPOISON_LIST_H */
diff --git a/src/main.c b/src/main.c
index 4c31511..817b231 100644
--- a/src/main.c
+++ b/src/main.c
@@ -573,8 +573,8 @@ main (int argc, char *argv[])
   set_sig_handler (SIGCHLD, chld_handler);
 
   /* Setup ratpoison's internal structures */
-  init_defaults();
-  init_numbers ();
+  init_defaults ();
+  init_window_stuff ();
 
   /* Initialize the screens */
   num_screens = ScreenCount (dpy);
@@ -730,8 +730,9 @@ clean_up ()
   free_keybindings ();
   free_aliases ();
   free_bar ();
-  free_numbers ();
   free_history ();
+
+  free_window_stuff ();
   
   for (i=0; i<num_screens; i++)
     {
diff --git a/src/manage.c b/src/manage.c
index 1cdb66a..7a19934 100644
--- a/src/manage.c
+++ b/src/manage.c
@@ -267,7 +267,7 @@ update_window_information (rp_window *win)
 void
 unmanage (rp_window *w)
 {
-  return_window_number (w->number);
+  numset_release (rp_window_numset, w->number);
   list_del (&w->node);
   free_window (w);  
 
@@ -635,7 +635,7 @@ map_window (rp_window *win)
 
   /* Fill in the necessary data about the window */
   update_window_information (win);
-  win->number = get_unique_window_number ();
+  win->number = numset_request (rp_window_numset);
   grab_prefix_key (win->w);
 
   /* Put win in the mapped window list */
@@ -719,7 +719,7 @@ withdraw_window (rp_window *win)
 
   /* Give back the window number. the window will get another one,
      if it is remapped. */
-  return_window_number (win->number);
+  numset_release (rp_window_numset, win->number);
   win->number = -1;
 
   list_move_tail(&win->node, &rp_unmapped_window);
diff --git a/src/number.c b/src/number.c
index 0dfd2cf..33dccab 100644
--- a/src/number.c
+++ b/src/number.c
@@ -24,71 +24,71 @@
 
 #include "ratpoison.h"
 
+/* Initialize a numset structure. */
+static void
+numset_init (struct numset *ns)
+{
+  ns->max_taken = 10;
+  ns->num_taken = 0;
 
-/* A list of the numbers taken. */
-static int *numbers_taken;
-
-/* the number of numbers currently stored in the numbers_taken
-   array. */
-static int num_taken;
-
-/* the size of the numbers_taken array. */
-static int max_taken;
+  ns->numbers_taken = xmalloc (ns->max_taken * sizeof (int));
+}
 
 static int
-number_is_taken (int n)
+numset_num_is_taken (struct numset *ns, int n)
 {
   int i;
 
-  for (i=0; i<num_taken; i++)
+  for (i=0; i<ns->num_taken; i++)
     {
-      if (numbers_taken[i] == n) return 1;
+      if (ns->numbers_taken[i] == n) return 1;
     }
   return 0;
 }
 
 /* returns index into numbers_taken that can be used. */
 static int
-find_empty_cell ()
+numset_find_empty_cell (struct numset *ns)
 {
   int i;
 
-  for (i=0; i<num_taken; i++)
+  for (i=0; i<ns->num_taken; i++)
     {
-      if (numbers_taken[i] == -1) return i;
+      if (ns->numbers_taken[i] == -1) return i;
     }
 
   /* no vacant ones, so grow the array. */
-  if (num_taken >= max_taken)
+  if (ns->num_taken >= ns->max_taken)
     {
-      max_taken *= 2;
-      numbers_taken = xrealloc (numbers_taken, sizeof (int) * max_taken);
+      ns->max_taken *= 2;
+      ns->numbers_taken = xrealloc (ns->numbers_taken, sizeof (int) * ns->max_taken);
     }
-  num_taken++;
+  ns->num_taken++;
 
-  return num_taken-1;
+  return ns->num_taken-1;
 }
 
 int
-add_window_number (int n)
+numset_add_num (struct numset *ns, int n)
 {
-  if (number_is_taken (n)) return 0; /* failed. */
+  if (numset_num_is_taken (ns, n)) 
+    return 0; /* failed. */
   
-  numbers_taken[find_empty_cell()] = n;
+  ns->numbers_taken[numset_find_empty_cell(ns)] = n;
   return 1; /* success! */
 }
 
 /* returns a unique number that can be used as the window number in
    the program bar. */
 int
-get_unique_window_number ()
+numset_request (struct numset *ns)
 {
   int i;
   
   /* look for a unique number, and add it to the list of taken
      numbers. */
   i = 0;
-  while (!add_window_number (i)) i++;
+  while (!numset_add_num (ns, i)) i++;
 
   return i;
 }
@@ -96,32 +96,35 @@ get_unique_window_number ()
 /* When a window is destroyed, it gives back its window number with
    this function. */
 void
-return_window_number (int n)
+numset_release (struct numset *ns, int n)
 {
   int i;
 
-  for (i=0; i<num_taken; i++)
+  for (i=0; i<ns->num_taken; i++)
     {
-      if (numbers_taken[i] == n) 
+      if (ns->numbers_taken[i] == n) 
 	{
-	  numbers_taken[i] = -1;
+	  ns->numbers_taken[i] = -1;
 	  return;
 	}
     }
 }
 
-
-void
-init_numbers ()
+/* Create a new numset and return a pointer to it. */
+struct numset *
+numset_new ()
 {
-  max_taken = 10;
-  num_taken = 0;
+  struct numset *ns;
 
-  numbers_taken = xmalloc (max_taken * sizeof (int));
+  ns = (struct numset *)xmalloc (sizeof (struct numset));
+  numset_init (ns);
+  return ns;
 }
 
+/* Free a numset structure and it's internal data. */
 void
-free_numbers ()
+numset_free (struct numset *ns)
 {
-  free (numbers_taken);
+  free (ns->numbers_taken);
+  free (ns);
 }
diff --git a/src/number.h b/src/number.h
index caecff5..1fc6a09 100644
--- a/src/number.h
+++ b/src/number.h
@@ -22,10 +22,24 @@
 #ifndef _RATPOISON_NUMBER_H
 #define _RATPOISON_NUMBER_H 1
 
-int get_unique_window_number ();
-void return_window_number (int n);
-int add_window_number (int n);
-void init_numbers ();
-void free_numbers ();
+/* Keep track of a set of numbers. For frames and windows. */
+struct numset
+{
+  /* A list of the numbers taken. */
+  int *numbers_taken;
+
+/* the number of numbers currently stored in the numbers_taken
+   array. */
+  int num_taken;
+
+/* the size of the numbers_taken array. */
+  int max_taken;
+};
+
+struct numset *numset_new ();
+void numset_free (struct numset *ns);
+void numset_release (struct numset *ns, int n);
+int numset_request (struct numset *ns);
+int numset_add_num (struct numset *ns, int n);
 
 #endif /* ! _RATPOISON_NUMBER_H */