[PATCH v3 09/19] Implement completion limiting for interpreter_completer.

[Keith Seitz <keiths@redhat.com>]

Differences in this revision:

1. Remove partial copy code from interpreter_completer..

---

This is another simple patch which converts interpreter_completer
to use add_completion and adds some tests to make sure that everything
is working properly.

gdb/ChangeLog

	* interps.c (interpreter_completer): Use add_completion.

gdb/testsuite/ChangeLog

	* gdb.base/completion.exp: Test completion limiting on
	interpreter name with "interpreter-exec".
---
 gdb/interps.c                         |   21 +++------------------
 gdb/testsuite/gdb.base/completion.exp |   16 ++++++++++++++++
 2 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/gdb/interps.c b/gdb/interps.c
index 2cfe92b..9e993c8 100644
--- a/gdb/interps.c
+++ b/gdb/interps.c
@@ -448,24 +448,9 @@ interpreter_completer (struct completer_data *cdata,
     {
       if (strncmp (interp->name, text, textlen) == 0)
 	{
-	  char *match;
-
-	  match = (char *) xmalloc (strlen (word) + strlen (interp->name) + 1);
-	  if (word == text)
-	    strcpy (match, interp->name);
-	  else if (word > text)
-	    {
-	      /* Return some portion of interp->name.  */
-	      strcpy (match, interp->name + (word - text));
-	    }
-	  else
-	    {
-	      /* Return some of text plus interp->name.  */
-	      strncpy (match, word, text - word);
-	      match[text - word] = '\0';
-	      strcat (match, interp->name);
-	    }
-	  VEC_safe_push (char_ptr, matches, match);
+	  if (add_completion (cdata, &matches, interp->name, text, word)
+	      == ADD_COMPLETION_MAX_REACHED)
+	    break;
 	}
     }
 
diff --git a/gdb/testsuite/gdb.base/completion.exp b/gdb/testsuite/gdb.base/completion.exp
index 884b9f6..41323d2 100644
--- a/gdb/testsuite/gdb.base/completion.exp
+++ b/gdb/testsuite/gdb.base/completion.exp
@@ -1022,6 +1022,22 @@ if {$num_signals > $max_completions} {
     untested $msg
 }
 
+# Test interpreter_completer.  There are only four completions
+# available for this, so temporarily set max-completions to 3.
+with_test_prefix "interpreter_completer" {
+    set old_max $max_completions
+    set max_completions 3
+    gdb_test_no_output "set max-completions $max_completions"
+}
+
+test_completion_limit "interpreter-exec m" \
+    "interpreter-exec mi\[1-3\]?" $max_completions
+
+with_test_prefix "interpreter_completer reset" {
+    set max_completions $old_max
+    gdb_test_no_output "set max-completions $max_completions"
+}
+
 #
 # Test TUI completions
 #