[subset] sketch out support for a call that lists all codepoints present in a font. Implement support for it in format 4 cmap sub table.
diff --git a/test/api/test-subset-codepoints.c b/test/api/test-subset-codepoints.c
new file mode 100644
index 0000000..c4f9c0e
--- /dev/null
+++ b/test/api/test-subset-codepoints.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright © 2018 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Garret Rieger
+ */
+
+#include "hb-test.h"
+#include "hb-subset-test.h"
+
+static void
+test_get_all_codepoints_format4 (void)
+{
+ hb_face_t *face = hb_subset_test_open_font("fonts/Roboto-Regular.abc.format4.ttf");
+ hb_set_t *codepoints = hb_set_create();
+
+ hb_subset_get_all_codepoints (face, codepoints);
+
+ hb_codepoint_t cp = HB_SET_VALUE_INVALID;
+ g_assert (hb_set_next (codepoints, &cp));
+ g_assert_cmpuint (0x61, ==, cp);
+ g_assert (hb_set_next (codepoints, &cp));
+ g_assert_cmpuint (0x62, ==, cp);
+ g_assert (hb_set_next (codepoints, &cp));
+ g_assert_cmpuint (0x63, ==, cp);
+ g_assert (!hb_set_next (codepoints, &cp));
+
+ hb_set_destroy (codepoints);
+ hb_face_destroy (face);
+}
+
+int
+main (int argc, char **argv)
+{
+ hb_test_init (&argc, &argv);
+
+ hb_test_add (test_get_all_codepoints_format4);
+
+ return hb_test_run();
+}
