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Make GDataOutputStream implement GSeekable

Browse Source 
https://bugzilla.gnome.org/show_bug.cgi?id=673034
This commit is contained in:
Maciej Piechotka
2012-03-29 02:08:41 +02:00
committed by Alexander Larsson
parent 43895e3089
commit a44e801983
2 changed files with 299 additions and 3 deletions
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194
gio/tests/data-output-stream.c
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@ -298,6 +298,198 @@ test_read_int (void)
g_free (buffer);
}
static void
test_seek (void)
{
GDataOutputStream *stream;
GMemoryOutputStream *base_stream;
GSeekable *seekable;
GError *error;
guchar *stream_data;
gsize len;
gboolean res;
len = 8;
/* create objects */
stream_data = g_malloc0 (len);
base_stream = G_MEMORY_OUTPUT_STREAM (g_memory_output_stream_new (stream_data, len, NULL, NULL));
stream = g_data_output_stream_new (G_OUTPUT_STREAM (base_stream));
g_data_output_stream_set_byte_order (stream, G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
seekable = G_SEEKABLE (stream);
g_assert (!g_seekable_can_truncate (seekable));
error = NULL;
/* Write */
g_assert_cmpint (g_seekable_tell (seekable), ==, 0);
res = g_data_output_stream_put_uint16 (stream, 0x0123, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_data_output_stream_put_uint16 (stream, 0x4567, NULL, NULL);
g_assert_cmpint (g_seekable_tell (seekable), ==, 4);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 4);
/* Forward relative seek */
res = g_seekable_seek (seekable, 2, G_SEEK_CUR, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 6);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 4);
res = g_data_output_stream_put_uint16 (stream, 0x89AB, NULL, &error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 8);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
g_assert_cmpint (stream_data[4], ==, 0x00);
g_assert_cmpint (stream_data[5], ==, 0x00);
g_assert_cmpint (stream_data[6], ==, 0x89);
g_assert_cmpint (stream_data[7], ==, 0xAB);
/* Backward relative seek */
res = g_seekable_seek (seekable, -3, G_SEEK_CUR, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 5);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
res = g_data_output_stream_put_uint16 (stream, 0xCDEF, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 7);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
g_assert_cmpint (stream_data[4], ==, 0x00);
g_assert_cmpint (stream_data[5], ==, 0xCD);
g_assert_cmpint (stream_data[6], ==, 0xEF);
g_assert_cmpint (stream_data[7], ==, 0xAB);
/* From start */
res = g_seekable_seek (seekable, 4, G_SEEK_SET, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 4);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
res = g_data_output_stream_put_uint16 (stream, 0xFEDC, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 6);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
g_assert_cmpint (stream_data[4], ==, 0xFE);
g_assert_cmpint (stream_data[5], ==, 0xDC);
g_assert_cmpint (stream_data[6], ==, 0xEF);
g_assert_cmpint (stream_data[7], ==, 0xAB);
/* From end */
res = g_seekable_seek (seekable, -4, G_SEEK_END, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 4);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
res = g_data_output_stream_put_uint16 (stream, 0xBA87, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_seekable_tell (seekable), ==, 6);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 8);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
g_assert_cmpint (stream_data[4], ==, 0xBA);
g_assert_cmpint (stream_data[5], ==, 0x87);
g_assert_cmpint (stream_data[6], ==, 0xEF);
g_assert_cmpint (stream_data[7], ==, 0xAB);
g_object_unref (stream);
g_object_unref (base_stream);
g_free (stream_data);
}
static void
test_truncate (void)
{
GDataOutputStream *stream;
GMemoryOutputStream *base_stream;
GSeekable *seekable;
GError *error;
guchar *stream_data;
gsize len;
gboolean res;
len = 8;
/* Create objects */
stream_data = g_malloc0 (len);
base_stream = G_MEMORY_OUTPUT_STREAM (g_memory_output_stream_new (stream_data, len, g_realloc, g_free));
stream = g_data_output_stream_new (G_OUTPUT_STREAM (base_stream));
g_data_output_stream_set_byte_order (stream, G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
seekable = G_SEEKABLE (stream);
error = NULL;
g_assert (g_seekable_can_truncate (seekable));
/* Write */
g_assert_cmpint (g_memory_output_stream_get_size (base_stream), ==, len);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 0);
res = g_data_output_stream_put_uint16 (stream, 0x0123, NULL, &error);
g_assert_no_error (error);
g_assert (res);
res = g_data_output_stream_put_uint16 (stream, 0x4567, NULL, NULL);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_memory_output_stream_get_size (base_stream), ==, len);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 4);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
/* Truncate at position */
res = g_seekable_truncate (seekable, 4, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_memory_output_stream_get_size (base_stream), ==, 4);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 4);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
/* Truncate beyond position */
res = g_seekable_truncate (seekable, 6, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_memory_output_stream_get_size (base_stream), ==, 6);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 4);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_assert_cmpint (stream_data[2], ==, 0x45);
g_assert_cmpint (stream_data[3], ==, 0x67);
/* Truncate before position */
res = g_seekable_truncate (seekable, 2, NULL, &error);
g_assert_no_error (error);
g_assert (res);
g_assert_cmpint (g_memory_output_stream_get_size (base_stream), ==, 2);
g_assert_cmpint (g_memory_output_stream_get_data_size (base_stream), ==, 2);
g_assert_cmpint (stream_data[0], ==, 0x01);
g_assert_cmpint (stream_data[1], ==, 0x23);
g_object_unref (stream);
g_object_unref (base_stream);
}
int
main (int argc,
char *argv[])
@ -310,6 +502,8 @@ main (int argc,
g_test_add_func ("/data-output-stream/write-lines-CR", test_read_lines_CR);
g_test_add_func ("/data-output-stream/write-lines-CR-LF", test_read_lines_CR_LF);
g_test_add_func ("/data-output-stream/write-int", test_read_int);
g_test_add_func ("/data-output-stream/seek", test_seek);
g_test_add_func ("/data-output-stream/truncate", test_truncate);
return g_test_run();
}