[test] Test blob API
diff --git a/test/test-blob.c b/test/test-blob.c
new file mode 100644
index 0000000..03962fb
--- /dev/null
+++ b/test/test-blob.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright © 2011 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): Behdad Esfahbod
+ */
+
+#include "hb-test.h"
+
+/* Unit tests for hb-blob.h */
+
+#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MPROTECT)
+
+# define TEST_MMAP 1
+
+#ifdef HAVE_SYS_MMAN_H
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <sys/mman.h>
+#endif /* HAVE_SYS_MMAN_H */
+
+#endif
+
+
+static void
+test_blob_empty (void)
+{
+ hb_blob_t *blob;
+ unsigned int len;
+ const char *data;
+ char *data_writable;
+
+ g_assert (hb_blob_is_immutable (hb_blob_get_empty ()));
+ g_assert (hb_blob_get_empty () != NULL);
+
+ blob = hb_blob_get_empty ();
+ g_assert (blob == hb_blob_get_empty ());
+
+ len = hb_blob_get_length (blob);
+ g_assert_cmpint (len, ==, 0);
+
+ data = hb_blob_get_data (blob, NULL);
+ g_assert (data == NULL);
+
+ data = hb_blob_get_data (blob, &len);
+ g_assert (data == NULL);
+ g_assert_cmpint (len, ==, 0);
+
+ data_writable = hb_blob_get_data_writable (blob, NULL);
+ g_assert (data == NULL);
+
+ data_writable = hb_blob_get_data_writable (blob, &len);
+ g_assert (data_writable == NULL);
+ g_assert_cmpint (len, ==, 0);
+}
+
+static const char test_data[] = "test\0data";
+
+static const char *blob_names[] = {
+ "duplicate",
+ "readonly",
+ "writable"
+#ifdef TEST_MMAP
+ , "readonly-may-make-writable"
+#endif
+};
+
+typedef struct
+{
+ hb_blob_t *blob;
+ int freed;
+ char *data;
+ unsigned int len;
+} fixture_t;
+
+static void
+free_up (fixture_t *fixture)
+{
+ g_assert_cmpint (fixture->freed, ==, 0);
+ fixture->freed++;
+}
+
+static void
+free_up_free (fixture_t *fixture)
+{
+ free_up (fixture);
+ free (fixture->data);
+}
+
+
+static uintptr_t
+get_pagesize (void)
+{
+ uintptr_t pagesize = -1;
+
+#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
+ pagesize = (uintptr_t) sysconf (_SC_PAGE_SIZE);
+#elif defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE)
+ pagesize = (uintptr_t) sysconf (_SC_PAGESIZE);
+#elif defined(HAVE_GETPAGESIZE)
+ pagesize = (uintptr_t) getpagesize ();
+#endif
+
+ g_assert (pagesize != (uintptr_t) -1);
+
+ return pagesize;
+}
+
+static void
+free_up_munmap (fixture_t *fixture)
+{
+ free_up (fixture);
+ munmap (fixture->data, get_pagesize ());
+}
+
+#include <errno.h>
+static void
+fixture_init (fixture_t *fixture, gconstpointer user_data)
+{
+ hb_memory_mode_t mm = (hb_memory_mode_t) GPOINTER_TO_INT (user_data);
+ unsigned int len;
+ const char *data;
+ hb_destroy_func_t free_func;
+
+ switch (GPOINTER_TO_INT (user_data))
+ {
+ case HB_MEMORY_MODE_DUPLICATE:
+ data = test_data;
+ len = sizeof (test_data);
+ free_func = (hb_destroy_func_t) free_up;
+ break;
+
+ case HB_MEMORY_MODE_READONLY:
+ data = test_data;
+ len = sizeof (test_data);
+ free_func = (hb_destroy_func_t) free_up;
+ break;
+
+ case HB_MEMORY_MODE_WRITABLE:
+ data = strndup (test_data, sizeof (test_data));
+ len = sizeof (test_data);
+ free_func = (hb_destroy_func_t) free_up_free;
+ break;
+
+#if TEST_MMAP
+ case HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE:
+ {
+ uintptr_t pagesize = get_pagesize ();
+
+ data = mmap (NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ g_assert (data != (char *) -1);
+ memcpy ((char *) data, test_data, sizeof (test_data));
+ mprotect ((char *) data, pagesize, PROT_READ);
+ len = sizeof (test_data);
+ free_func = (hb_destroy_func_t) free_up_munmap;
+ break;
+ }
+#endif
+
+ default:
+ g_assert_not_reached ();
+ }
+
+ fixture->freed = 0;
+ fixture->data = (char *) data;
+ fixture->len = len;
+ fixture->blob = hb_blob_create (data, len, mm, fixture, free_func);
+}
+
+static void
+fixture_finish (fixture_t *fixture, gconstpointer user_data)
+{
+ hb_blob_destroy (fixture->blob);
+ g_assert_cmpint (fixture->freed, ==, 1);
+}
+
+
+static void
+test_blob (fixture_t *fixture, gconstpointer user_data)
+{
+ hb_blob_t *b = fixture->blob;
+ hb_memory_mode_t mm = GPOINTER_TO_INT (user_data);
+ unsigned int len;
+ const char *data;
+ char *data_writable;
+ unsigned int i;
+
+ g_assert (b);
+
+ len = hb_blob_get_length (b);
+ g_assert_cmpint (len, ==, fixture->len);
+
+ data = hb_blob_get_data (b, &len);
+ g_assert_cmpint (len, ==, fixture->len);
+ if (mm == HB_MEMORY_MODE_DUPLICATE) {
+ g_assert (data != fixture->data);
+ g_assert_cmpint (fixture->freed, ==, 1);
+ mm = HB_MEMORY_MODE_WRITABLE;
+ } else {
+ g_assert (data == fixture->data);
+ g_assert_cmpint (fixture->freed, ==, 0);
+ }
+
+ data_writable = hb_blob_get_data_writable (b, &len);
+ g_assert_cmpint (len, ==, fixture->len);
+ g_assert (data_writable);
+ g_assert (0 == memcmp (data_writable, fixture->data, fixture->len));
+ if (mm == HB_MEMORY_MODE_READONLY) {
+ g_assert (data_writable != data);
+ g_assert_cmpint (fixture->freed, ==, 1);
+ } else {
+ g_assert (data_writable == data);
+ }
+
+ data = hb_blob_get_data (b, &len);
+ g_assert_cmpint (len, ==, fixture->len);
+ g_assert (data == data_writable);
+
+ memset (data_writable, 0, fixture->len);
+
+ /* Now, make it immutable and watch get_data_writable() fail */
+
+ g_assert (!hb_blob_is_immutable (b));
+ hb_blob_make_immutable (b);
+ g_assert (hb_blob_is_immutable (b));
+
+ data_writable = hb_blob_get_data_writable (b, &len);
+ g_assert (!data_writable);
+ g_assert_cmpint (len, ==, 0);
+
+ data = hb_blob_get_data (b, &len);
+ g_assert_cmpint (len, ==, fixture->len);
+ for (i = 0; i < len; i++)
+ g_assert ('\0' == data[i]);
+}
+
+
+int
+main (int argc, char **argv)
+{
+ unsigned int i;
+
+ hb_test_init (&argc, &argv);
+
+ hb_test_add (test_blob_empty);
+
+ for (i = 0; i < G_N_ELEMENTS (blob_names); i++)
+ {
+ const void *blob_type = GINT_TO_POINTER (i);
+ const char *blob_name = blob_names[i];
+
+ hb_test_add_fixture_flavor (fixture, blob_type, blob_name, test_blob);
+ }
+
+ /*
+ * create_sub_blob
+ */
+
+ return hb_test_run ();
+}
