glib/gio/tests/readwrite.c

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#include <glib/glib.h>
#include <glib/gstdio.h>
#include <gio/gio.h>
#include <unistd.h>
#include <string.h>
static const char *original_data = "This is some test data that we can put in a file...";
static const char *new_data = "new data..";
static void
verify_pos (GIOStream *iostream, goffset expected_pos)
{
goffset pos;
pos = g_seekable_tell (G_SEEKABLE (iostream));
g_assert_cmpint (pos, ==, expected_pos);
pos = g_seekable_tell (G_SEEKABLE (g_io_stream_get_input_stream (iostream)));
g_assert_cmpint (pos, ==, expected_pos);
pos = g_seekable_tell (G_SEEKABLE (g_io_stream_get_output_stream (iostream)));
g_assert_cmpint (pos, ==, expected_pos);
}
static void
verify_iostream (GFileIOStream *file_iostream)
{
gboolean res;
GIOStream *iostream;
GError *error;
GInputStream *in;
GOutputStream *out;
char buffer[1024];
gsize n_bytes;
char *modified_data;
iostream = G_IO_STREAM (file_iostream);
verify_pos (iostream, 0);
in = g_io_stream_get_input_stream (iostream);
out = g_io_stream_get_output_stream (iostream);
res = g_input_stream_read_all (in, buffer, 20, &n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint ((int)n_bytes, ==, 20);
g_assert (memcmp (buffer, original_data, 20) == 0);
verify_pos (iostream, 20);
res = g_seekable_seek (G_SEEKABLE (iostream),
-10, G_SEEK_END,
NULL, NULL);
g_assert (res);
verify_pos (iostream, strlen (original_data) - 10);
res = g_input_stream_read_all (in, buffer, 20, &n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint ((int)n_bytes, ==, 10);
g_assert (memcmp (buffer, original_data + strlen (original_data) - 10, 10) == 0);
verify_pos (iostream, strlen (original_data));
res = g_seekable_seek (G_SEEKABLE (iostream),
10, G_SEEK_SET,
NULL, NULL);
verify_pos (iostream, 10);
res = g_output_stream_write_all (out, new_data, strlen (new_data),
&n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint (n_bytes, ==, strlen (new_data));
verify_pos (iostream, 10 + strlen (new_data));
res = g_seekable_seek (G_SEEKABLE (iostream),
0, G_SEEK_SET,
NULL, NULL);
g_assert (res);
verify_pos (iostream, 0);
res = g_input_stream_read_all (in, buffer, strlen (original_data), &n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint ((int)n_bytes, ==, strlen (original_data));
buffer[n_bytes] = 0;
modified_data = g_strdup (original_data);
memcpy (modified_data + 10, new_data, strlen (new_data));
g_assert_cmpstr (buffer, ==, modified_data);
verify_pos (iostream, strlen (original_data));
res = g_seekable_seek (G_SEEKABLE (iostream),
0, G_SEEK_SET,
NULL, NULL);
g_assert (res);
verify_pos (iostream, 0);
res = g_output_stream_close (out, NULL, NULL);
g_assert (res);
res = g_input_stream_read_all (in, buffer, 15, &n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint ((int)n_bytes, ==, 15);
g_assert (memcmp (buffer, modified_data, 15) == 0);
error = NULL;
res = g_output_stream_write_all (out, new_data, strlen (new_data),
&n_bytes, NULL, &error);
g_assert (!res);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_CLOSED);
g_error_free (error);
error = NULL;
res = g_io_stream_close (iostream, NULL, &error);
g_assert (res);
g_assert_no_error (error);
g_free (modified_data);
}
static void
test_g_file_open_readwrite (void)
{
char *tmp_file;
int fd;
gboolean res;
GFileIOStream *file_iostream;
char *path;
GFile *file;
GError *error;
fd = g_file_open_tmp ("readwrite_XXXXXX",
&tmp_file, NULL);
g_assert (fd != -1);
close (fd);
res = g_file_set_contents (tmp_file,
original_data, -1, NULL);
g_assert (res);
path = g_build_filename (g_get_tmp_dir (), "g-a-nonexisting-file", NULL);
file = g_file_new_for_path (path);
g_free (path);
error = NULL;
file_iostream = g_file_open_readwrite (file, NULL, &error);
g_assert (file_iostream == NULL);
g_assert (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND));
g_error_free (error);
g_object_unref (file);
file = g_file_new_for_path (tmp_file);
error = NULL;
file_iostream = g_file_open_readwrite (file, NULL, &error);
g_assert (file_iostream != NULL);
g_object_unref (file);
verify_iostream (file_iostream);
g_object_unref (file_iostream);
g_unlink (tmp_file);
g_free (tmp_file);
}
static void
test_g_file_create_readwrite (void)
{
char *tmp_file;
int fd;
gboolean res;
GFileIOStream *file_iostream;
GOutputStream *out;
GFile *file;
GError *error;
gsize n_bytes;
fd = g_file_open_tmp ("readwrite_XXXXXX",
&tmp_file, NULL);
g_assert (fd != -1);
close (fd);
file = g_file_new_for_path (tmp_file);
error = NULL;
file_iostream = g_file_create_readwrite (file, 0, NULL, &error);
g_assert (file_iostream == NULL);
g_assert_error (error, G_IO_ERROR, G_IO_ERROR_EXISTS);
g_error_free (error);
g_unlink (tmp_file);
file_iostream = g_file_create_readwrite (file, 0, NULL, &error);
g_assert (file_iostream != NULL);
out = g_io_stream_get_output_stream (G_IO_STREAM (file_iostream));
res = g_output_stream_write_all (out, original_data, strlen (original_data),
&n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint (n_bytes, ==, strlen (original_data));
res = g_seekable_seek (G_SEEKABLE (file_iostream),
0, G_SEEK_SET,
NULL, NULL);
g_assert (res);
verify_iostream (file_iostream);
g_object_unref (file_iostream);
g_object_unref (file);
g_unlink (tmp_file);
g_free (tmp_file);
}
static void
test_g_file_replace_readwrite (void)
{
char *tmp_file, *backup, *data;
int fd;
gboolean res;
GFileIOStream *file_iostream;
GInputStream *in;
GOutputStream *out;
GFile *file;
GError *error;
char buffer[1024];
gsize n_bytes;
fd = g_file_open_tmp ("readwrite_XXXXXX",
&tmp_file, NULL);
g_assert (fd != -1);
close (fd);
res = g_file_set_contents (tmp_file,
new_data, -1, NULL);
g_assert (res);
file = g_file_new_for_path (tmp_file);
error = NULL;
file_iostream = g_file_replace_readwrite (file, NULL,
TRUE, 0, NULL, &error);
g_assert (file_iostream != NULL);
in = g_io_stream_get_input_stream (G_IO_STREAM (file_iostream));
/* Ensure its empty */
res = g_input_stream_read_all (in, buffer, sizeof buffer, &n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint ((int)n_bytes, ==, 0);
out = g_io_stream_get_output_stream (G_IO_STREAM (file_iostream));
res = g_output_stream_write_all (out, original_data, strlen (original_data),
&n_bytes, NULL, NULL);
g_assert (res);
g_assert_cmpint (n_bytes, ==, strlen (original_data));
res = g_seekable_seek (G_SEEKABLE (file_iostream),
0, G_SEEK_SET,
NULL, NULL);
g_assert (res);
verify_iostream (file_iostream);
g_object_unref (file_iostream);
g_object_unref (file);
backup = g_strconcat (tmp_file, "~", NULL);
res = g_file_get_contents (backup,
&data,
NULL, NULL);
g_assert (res);
g_assert_cmpstr (data, ==, new_data);
g_free (data);
g_unlink (backup);
g_free (backup);
g_unlink (tmp_file);
g_free (tmp_file);
}
int
main (int argc,
char *argv[])
{
g_type_init ();
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/readwrite/test_g_file_open_readwrite",
test_g_file_open_readwrite);
g_test_add_func ("/readwrite/test_g_file_create_readwrite",
test_g_file_create_readwrite);
g_test_add_func ("/readwrite/test_g_file_replace_readwrite",
test_g_file_replace_readwrite);
return g_test_run();
}