FYI: add user_breakpoint_p

[Tom Tromey <tromey@redhat.com>]

I am planning to check this in.

I needed a `user_breakpoint_p' function for async breakpoint
notifications in MI.  While writing this, I noticed similar code in
breakpoint.c, so this patch introduces the function and changes
everyplace to use it.

There was some inconsistency about whether the test should be ">= 0"
or "> 0".  The latter seems more correct to me, since I think user
breakpoints always begin with 1.

Built and regtested on x86-64 (compile farm).

Tom

2011-01-27  Tom Tromey  <tromey@redhat.com>

	* breakpoint.h (user_breakpoint_p): Declare.
	* breakpoint.c (user_breakpoint_p): New function.
	(breakpoint_1): Use it.
	(save_breakpoints): Likewise.

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 8d0692b..c7a6484 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -5064,6 +5064,15 @@ user_settable_breakpoint (const struct breakpoint *b)
 	  || is_watchpoint (b));
 }
 
+/* Return true if this breakpoint was set by the user, false if it is
+   internal or momentary.  */
+
+int
+user_breakpoint_p (struct breakpoint *b)
+{
+  return user_settable_breakpoint (b) && b->number > 0;
+}
+
 /* Print information on user settable breakpoint (watchpoint, etc)
    number BNUM.  If BNUM is -1 print all user-settable breakpoints.
    If ALLFLAG is non-zero, include non-user-settable breakpoints.  If
@@ -5096,8 +5105,7 @@ breakpoint_1 (int bnum, int allflag,
 	if (filter && !filter (b))
 	  continue;
 	
-	if (allflag || (user_settable_breakpoint (b)
-			&& b->number > 0))
+	if (allflag || user_breakpoint_p (b))
 	  {
 	    int addr_bit, type_len;
 
@@ -5169,8 +5177,7 @@ breakpoint_1 (int bnum, int allflag,
 	
 	/* We only print out user settable breakpoints unless the
 	   allflag is set.  */
-	if (allflag || (user_settable_breakpoint (b)
-			&& b->number > 0))
+	if (allflag || user_breakpoint_p (b))
 	  print_one_breakpoint (b, &last_loc, print_address_bits, allflag);
       }
   }
@@ -11727,7 +11734,7 @@ save_breakpoints (char *filename, int from_tty,
   ALL_BREAKPOINTS (tp)
   {
     /* Skip internal and momentary breakpoints.  */
-    if (!user_settable_breakpoint (tp) || tp->number < 0)
+    if (! user_breakpoint_p (tp))
       continue;
 
     /* If we have a filter, only save the breakpoints it accepts.  */
@@ -11765,7 +11772,7 @@ save_breakpoints (char *filename, int from_tty,
   ALL_BREAKPOINTS (tp)
   {
     /* Skip internal and momentary breakpoints.  */
-    if (!user_settable_breakpoint (tp) || tp->number < 0)
+    if (! user_breakpoint_p (tp))
       continue;
 
     /* If we have a filter, only save the breakpoints it accepts.  */
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index 69598a7..6eed2cd 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -1184,4 +1184,6 @@ extern void end_rbreak_breakpoints (void);
 extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *,
 							     void *), void *);
 
+extern int user_breakpoint_p (struct breakpoint *);
+
 #endif /* !defined (BREAKPOINT_H) */