[PATCH 3/4] Handle parse number error in goto_bookmark_command

[Yao Qi <yao@codesourcery.com>]

In GDB mainline, the error message for goto-bookmark
isn't perfect.

 (gdb) goto-bookmark 1.1
 goto-bookmark: no bookmark found for ''.

This patch tweaks the error message by checking the return value of
get_number.  With patch applied, it becomes:

 (gdb) goto-bookmark 1.1
 goto-bookmark: no bookmark found for '1.1'.

gdb:

2014-03-05  Yao Qi  <yao@codesourcery.com>

	* reverse.c (goto_bookmark_command): Add local 'p'.  Emit error
	early if get_number returns zero.  Use 'p' instead of 'args'.
---
 gdb/reverse.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/gdb/reverse.c b/gdb/reverse.c
index 582252c..0ceecf9 100644
--- a/gdb/reverse.c
+++ b/gdb/reverse.c
@@ -250,6 +250,7 @@ goto_bookmark_command (char *args, int from_tty)
 {
   struct bookmark *b;
   unsigned long num;
+  char *p = args;
 
   if (args == NULL || args[0] == '\0')
     error (_("Command requires an argument."));
@@ -274,6 +275,10 @@ goto_bookmark_command (char *args, int from_tty)
 
   /* General case.  Bookmark identified by bookmark number.  */
   num = get_number (&args);
+
+  if (num == 0)
+    error (_("goto-bookmark: no bookmark found for '%s'."), p);
+
   ALL_BOOKMARKS (b)
     if (b->number == num)
       break;
@@ -285,7 +290,7 @@ goto_bookmark_command (char *args, int from_tty)
       return;
     }
   /* Not found.  */
-  error (_("goto-bookmark: no bookmark found for '%s'."), args);
+  error (_("goto-bookmark: no bookmark found for '%s'."), p);
 }
 
 static int
-- 
1.7.7.6