Make some bpstat functions use bool

Change return type to bool and adjust function comments.

gdb/ChangeLog:

	* breakpoint.h (bpstat_explains_signal, bpstat_causes_stop,
	bpstat_should_step): Return bool, adjust comments.
	* breakpoint.c (bpstat_explains_signal, bpstat_causes_stop,
	bpstat_should_step): Likewise.

3 files changed, 27 insertions, 20 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0c2dca7..598d092 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2019-07-10  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* breakpoint.h (bpstat_explains_signal, bpstat_causes_stop,
+	bpstat_should_step): Return bool, adjust comments.
+	* breakpoint.c (bpstat_explains_signal, bpstat_causes_stop,
+	bpstat_should_step): Likewise.
+
 2019-07-10  Alan Hayward  <alan.hayward@arm.com>
 
 	* features/Makefile: Use feature target descriptions for Arm.
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index f780bed..fc0d72e 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -4231,7 +4231,7 @@ bpstat_find_breakpoint (bpstat bsp, struct breakpoint *breakpoint)
 
 /* See breakpoint.h.  */
 
-int
+bool
 bpstat_explains_signal (bpstat bsp, enum gdb_signal sig)
 {
   for (; bsp != NULL; bsp = bsp->next)
@@ -4241,17 +4241,17 @@ bpstat_explains_signal (bpstat bsp, enum gdb_signal sig)
 	  /* A moribund location can never explain a signal other than
 	     GDB_SIGNAL_TRAP.  */
 	  if (sig == GDB_SIGNAL_TRAP)
-	    return 1;
+	    return true;
 	}
       else
 	{
 	  if (bsp->breakpoint_at->ops->explains_signal (bsp->breakpoint_at,
 							sig))
-	    return 1;
+	    return true;
 	}
     }
 
-  return 0;
+  return false;
 }
 
 /* Put in *NUM the breakpoint number of the first breakpoint we are
@@ -5687,29 +5687,29 @@ bpstat_run_callbacks (bpstat bs_head)
     }
 }
 
-/* Nonzero if we should step constantly (e.g. watchpoints on machines
-   without hardware support).  This isn't related to a specific bpstat,
-   just to things like whether watchpoints are set.  */
+/* See breakpoint.h.  */
 
-int
-bpstat_should_step (void)
+bool
+bpstat_should_step ()
 {
   struct breakpoint *b;
 
   ALL_BREAKPOINTS (b)
     if (breakpoint_enabled (b) && b->type == bp_watchpoint && b->loc != NULL)
-      return 1;
-  return 0;
+      return true;
+  return false;
 }
 
-int
+/* See breakpoint.h.  */
+
+bool
 bpstat_causes_stop (bpstat bs)
 {
   for (; bs != NULL; bs = bs->next)
     if (bs->stop)
-      return 1;
+      return true;
 
-  return 0;
+  return false;
 }
 
 
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index 40834ef..dfe7d15 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -1061,18 +1061,18 @@ extern void bpstat_run_callbacks (bpstat bs_head);
 /* Find the bpstat associated with a breakpoint.  NULL otherwise.  */
 bpstat bpstat_find_breakpoint (bpstat, struct breakpoint *);
 
-/* Nonzero if a signal that we got in target_wait() was due to
+/* True if a signal that we got in target_wait() was due to
    circumstances explained by the bpstat; the signal is therefore not
    random.  */
-extern int bpstat_explains_signal (bpstat, enum gdb_signal);
+extern bool bpstat_explains_signal (bpstat, enum gdb_signal);
 
-/* Nonzero is this bpstat causes a stop.  */
-extern int bpstat_causes_stop (bpstat);
+/* True if this bpstat causes a stop.  */
+extern bool bpstat_causes_stop (bpstat);
 
-/* Nonzero if we should step constantly (e.g. watchpoints on machines
+/* True if we should step constantly (e.g. watchpoints on machines
    without hardware support).  This isn't related to a specific bpstat,
    just to things like whether watchpoints are set.  */
-extern int bpstat_should_step (void);
+extern bool bpstat_should_step ();
 
 /* Print a message indicating what happened.  Returns nonzero to
    say that only the source line should be printed after this (zero