harfbuzz/test/api/test-blob.c

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/*
* 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) && defined(HAVE_MMAP)
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# 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);
g_assert (hb_blob_get_empty () == hb_blob_create (NULL, 0, HB_MEMORY_MODE_READONLY, NULL, NULL));
g_assert (hb_blob_get_empty () == hb_blob_create ("asdf", 0, HB_MEMORY_MODE_READONLY, NULL, NULL));
g_assert (hb_blob_get_empty () == hb_blob_create (NULL, -1, HB_MEMORY_MODE_READONLY, NULL, NULL));
g_assert (hb_blob_get_empty () == hb_blob_create ("asdfg", -1, HB_MEMORY_MODE_READONLY, NULL, NULL));
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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_writable == NULL);
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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);
}
#ifdef TEST_MMAP
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static uintptr_t
get_pagesize (void)
{
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uintptr_t pagesize = (uintptr_t) -1;
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#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 ());
}
#endif
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#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:
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data = malloc (sizeof (test_data));
memcpy ((char *) data, test_data, sizeof (test_data));
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len = sizeof (test_data);
free_func = (hb_destroy_func_t) free_up_free;
break;
#ifdef TEST_MMAP
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case HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE:
{
uintptr_t pagesize = get_pagesize ();
data = mmap (NULL, pagesize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
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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]);
}
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static void
test_blob_subblob (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;
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if (mm == HB_MEMORY_MODE_DUPLICATE) {
g_assert_cmpint (fixture->freed, ==, 1);
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fixture->data = (char *) hb_blob_get_data (b, NULL);
} else {
g_assert_cmpint (fixture->freed, ==, 0);
}
fixture->blob = hb_blob_create_sub_blob (b, 1, fixture->len - 2);
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hb_blob_destroy (b);
b = fixture->blob;
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/* A sub-blob is always created READONLY. */
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g_assert (b);
len = hb_blob_get_length (b);
g_assert_cmpint (len, ==, fixture->len - 2);
data = hb_blob_get_data (b, &len);
g_assert_cmpint (len, ==, fixture->len - 2);
g_assert (data == fixture->data + 1);
data_writable = hb_blob_get_data_writable (b, &len);
g_assert_cmpint (len, ==, fixture->len - 2);
g_assert (data_writable);
if (mm == HB_MEMORY_MODE_READONLY)
g_assert (0 == memcmp (data_writable, fixture->data + 1, fixture->len - 2));
g_assert (data_writable != data);
g_assert_cmpint (fixture->freed, ==, 1);
data = hb_blob_get_data (b, &len);
g_assert_cmpint (len, ==, fixture->len - 2);
g_assert (data == data_writable);
memset (data_writable, 0, fixture->len - 2);
/* 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 - 2);
for (i = 0; i < len; i++)
g_assert ('\0' == data[i]);
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}
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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);
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hb_test_add_fixture_flavor (fixture, blob_type, blob_name, test_blob_subblob);
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}
/*
* create_sub_blob
*/
return hb_test_run ();
}