gpattern: Implement copy function

Add copy ability for pattern spec, so that it can be used as a boxed
type.

docs/reference/glib/glib-sections.txt

@@ -1425,6 +1425,7 @@ GPatternSpec
 g_pattern_spec_new
 g_pattern_spec_free
 g_pattern_spec_equal
+g_pattern_spec_copy
 g_pattern_match
 g_pattern_match_string
 g_pattern_match_simple

glib/gpattern.c

@@ -24,6 +24,7 @@
 #include "gmacros.h"
 #include "gmessages.h"
 #include "gmem.h"
+#include "gstrfuncs.h"
 #include "gunicode.h"
 #include "gutils.h" 
 
@@ -353,6 +354,30 @@ g_pattern_spec_new (const gchar *pattern)
   return pspec;
 }
 
+/**
+ * g_pattern_spec_copy:
+ * @pspec: a #GPatternSpec
+ *
+ * Copies @pspec in a new #GPatternSpec.
+ *
+ * Returns: (transfer full): a copy of @pspec.
+ *
+ * Since: 2.70
+ **/
+GPatternSpec *
+g_pattern_spec_copy (GPatternSpec *pspec)
+{
+  GPatternSpec *pspec_copy;
+
+  g_return_val_if_fail (pspec != NULL, NULL);
+
+  pspec_copy = g_new (GPatternSpec, 1);
+  *pspec_copy = *pspec;
+  pspec_copy->pattern = g_strndup (pspec->pattern, pspec->pattern_length);
+
+  return pspec_copy;
+}
+
 /**
  * g_pattern_spec_free:
  * @pspec: a #GPatternSpec

glib/gpattern.h

@@ -33,6 +33,8 @@ GLIB_AVAILABLE_IN_ALL
 GPatternSpec* g_pattern_spec_new       (const gchar  *pattern);
 GLIB_AVAILABLE_IN_ALL
 void          g_pattern_spec_free      (GPatternSpec *pspec);
+GLIB_AVAILABLE_IN_2_70
+GPatternSpec *g_pattern_spec_copy (GPatternSpec *pspec);
 GLIB_AVAILABLE_IN_ALL
 gboolean      g_pattern_spec_equal     (GPatternSpec *pspec1,
 					GPatternSpec *pspec2);

glib/tests/pattern.c

@@ -84,6 +84,24 @@ test_compilation (gconstpointer d)
   g_pattern_spec_free (spec);
 }
 
+static void
+test_copy (gconstpointer d)
+{
+  const CompileTest *test = d;
+  GPatternSpec *p1, *p2;
+
+  p1 = g_pattern_spec_new (test->src);
+  p2 = g_pattern_spec_copy (p1);
+
+  g_assert_cmpint (p2->match_type, ==, test->match_type);
+  g_assert_cmpstr (p2->pattern, ==, test->pattern);
+  g_assert_cmpint (p2->pattern_length, ==, strlen (p1->pattern));
+  g_assert_cmpint (p2->min_length, ==, test->min);
+
+  g_pattern_spec_free (p1);
+  g_pattern_spec_free (p2);
+}
+
 typedef struct _MatchTest MatchTest;
 
 struct _MatchTest
@@ -222,6 +240,13 @@ main (int argc, char** argv)
       g_free (path);
     }
 
+  for (i = 0; i < G_N_ELEMENTS (compile_tests); i++)
+    {
+      path = g_strdup_printf ("/pattern/copy/%" G_GSIZE_FORMAT, i);
+      g_test_add_data_func (path, &compile_tests[i], test_copy);
+      g_free (path);
+    }
+
   for (i = 0; i < G_N_ELEMENTS (match_tests); i++)
     {
       path = g_strdup_printf ("/pattern/match/%" G_GSIZE_FORMAT, i);