[glib: 1/2] GOption: Allow NULL arguments to parse_strv

[Nirbheek Chauhan <nirbheekc src gnome org>]

commit 9d513beeca70252c7430d2f06f957d8dfab7f8ad
Author: Christian Persch <chpe gnome org>
Date:   Tue Aug 27 10:42:40 2019 +0200

    GOption: Allow NULL arguments to parse_strv
    
    Close issue #873

 glib/goption.c              | 8 +++++---
 glib/tests/option-context.c | 5 +++++
 2 files changed, 10 insertions(+), 3 deletions(-)
---
diff --git a/glib/goption.c b/glib/goption.c
index 183e9d9d3..38b12af3e 100644
--- a/glib/goption.c
+++ b/glib/goption.c
@@ -2708,8 +2708,10 @@ g_option_context_get_description (GOptionContext *context)
 /**
  * g_option_context_parse_strv:
  * @context: a #GOptionContext
- * @arguments: (inout) (array zero-terminated=1): a pointer to the
- *    command line arguments (which must be in UTF-8 on Windows)
+ * @arguments: (inout) (array null-terminated=1) (optional): a pointer
+ *    to the command line arguments (which must be in UTF-8 on Windows).
+ *    Starting with GLib 2.62, @arguments can be %NULL, which matches
+ *    g_option_context_parse().
  * @error: a return location for errors
  *
  * Parses the command line arguments.
@@ -2743,7 +2745,7 @@ g_option_context_parse_strv (GOptionContext   *context,
   gint argc;
 
   context->strv_mode = TRUE;
-  argc = g_strv_length (*arguments);
+  argc = arguments && *arguments ? g_strv_length (*arguments) : 0;
   success = g_option_context_parse (context, &argc, arguments, error);
   context->strv_mode = FALSE;
 
diff --git a/glib/tests/option-context.c b/glib/tests/option-context.c
index 34ebfaaf6..f4ff746d3 100644
--- a/glib/tests/option-context.c
+++ b/glib/tests/option-context.c
@@ -1912,6 +1912,11 @@ missing_arg_test (void)
   g_strfreev (argv_copy);
   g_free (argv);
   g_option_context_free (context);
+
+  /* Checking g_option_context_parse_strv on NULL args */
+  context = g_option_context_new (NULL);
+  g_assert_true (g_option_context_parse_strv (context, NULL, NULL));
+  g_option_context_free (context);
 }
 
 static gchar *test_arg;