ipset_node_id_t
ipset_node_cache_load(GInputStream *stream,
ipset_node_cache_t *cache,
GError **err)
{
g_return_val_if_fail(err == NULL || *err == NULL, FALSE);
ipset_node_id_t result;
gsize bytes_read;
/*
* Create a GDataInputStream to read in the binary data.
*/
GDataInputStream *dstream = g_data_input_stream_new(stream);
g_data_input_stream_set_byte_order
(dstream, G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
/*
* First, read in the magic number from the stream to ensure that
* this is an IP set.
*/
guint8 magic[MAGIC_NUMBER_LENGTH];
g_debug("Reading IP set magic number");
TRY_OR_RETURN(0,
g_input_stream_read_all,
G_INPUT_STREAM(dstream),
magic, MAGIC_NUMBER_LENGTH,
&bytes_read, NULL);
if (bytes_read != MAGIC_NUMBER_LENGTH)
{
/*
* We reached EOF before reading the entire magic number.
*/
g_set_error(err,
IPSET_ERROR,
IPSET_ERROR_PARSE_ERROR,
"Unexpected end of file");
return 0;
}
if (memcmp(magic, MAGIC_NUMBER, MAGIC_NUMBER_LENGTH) != 0)
{
/*
* The magic number doesn't match, so this isn't a BDD.
*/
g_set_error(err,
IPSET_ERROR,
IPSET_ERROR_PARSE_ERROR,
"Magic number doesn't match; "
"this isn't an IP set.");
return 0;
}
/*
* Read in the version number and dispatch to the right reading
* function.
*/
guint16 version;
g_debug("Reading IP set version");
TRY_OR_RETURN(0,
version = g_data_input_stream_read_uint16,
dstream, NULL);
switch (version)
{
case 0x0001:
TRY_OR_RETURN(0,
result = load_v1,
dstream, cache);
return result;
default:
/*
* We don't know how to read this version number.
*/
g_set_error(err,
IPSET_ERROR,
IPSET_ERROR_PARSE_ERROR,
"Unknown version number %" G_GUINT16_FORMAT,
version);
return 0;
}
error:
/*
* If there's an error, clean up the objects that we've created
* before returning.
*/
if (dstream != NULL)
g_object_unref(dstream);
return result;
}
static void
gth_metadata_provider_image_read (GthMetadataProvider *self,
GthFileData *file_data,
const char *attributes,
GCancellable *cancellable)
{
gboolean format_recognized;
GFileInputStream *stream;
char *description = NULL;
int width;
int height;
const char *mime_type = NULL;
format_recognized = FALSE;
stream = g_file_read (file_data->file, cancellable, NULL);
if (stream != NULL) {
int buffer_size;
guchar *buffer;
gssize size;
buffer_size = BUFFER_SIZE;
buffer = g_new (guchar, buffer_size);
size = g_input_stream_read (G_INPUT_STREAM (stream),
buffer,
buffer_size,
cancellable,
NULL);
if (size >= 0) {
if ((size >= 24)
/* PNG signature */
&& (buffer[0] == 0x89)
&& (buffer[1] == 0x50)
&& (buffer[2] == 0x4E)
&& (buffer[3] == 0x47)
&& (buffer[4] == 0x0D)
&& (buffer[5] == 0x0A)
&& (buffer[6] == 0x1A)
&& (buffer[7] == 0x0A)
/* IHDR Image header */
&& (buffer[12] == 0x49)
&& (buffer[13] == 0x48)
&& (buffer[14] == 0x44)
&& (buffer[15] == 0x52))
{
/* PNG */
width = (buffer[16] << 24) + (buffer[17] << 16) + (buffer[18] << 8) + buffer[19];
height = (buffer[20] << 24) + (buffer[21] << 16) + (buffer[22] << 8) + buffer[23];
description = _("PNG");
mime_type = "image/png";
format_recognized = TRUE;
}
#if HAVE_LIBJPEG
else if ((size >= 4)
&& (buffer[0] == 0xff)
&& (buffer[1] == 0xd8)
&& (buffer[2] == 0xff))
{
/* JPEG */
GthTransform orientation;
if (g_seekable_can_seek (G_SEEKABLE (stream))) {
g_seekable_seek (G_SEEKABLE (stream), 0, G_SEEK_SET, cancellable, NULL);
}
else {
g_object_unref (stream);
stream = g_file_read (file_data->file, cancellable, NULL);
}
if (_jpeg_get_image_info (G_INPUT_STREAM (stream),
&width,
&height,
&orientation,
cancellable,
NULL))
{
description = _("JPEG");
mime_type = "image/jpeg";
format_recognized = TRUE;
if ((orientation == GTH_TRANSFORM_ROTATE_90)
|| (orientation == GTH_TRANSFORM_ROTATE_270)
|| (orientation == GTH_TRANSFORM_TRANSPOSE)
|| (orientation == GTH_TRANSFORM_TRANSVERSE))
{
int tmp = width;
width = height;
height = tmp;
}
}
}
#endif /* HAVE_LIBJPEG */
#if HAVE_LIBWEBP
else if ((size > 15) && (memcmp (buffer + 8, "WEBPVP8", 7) == 0)) {
WebPDecoderConfig config;
if (WebPInitDecoderConfig (&config)) {
if (WebPGetFeatures (buffer, buffer_size, &config.input) == VP8_STATUS_OK) {
width = config.input.width;
height = config.input.height;
description = _("WebP");
mime_type = "image/webp";
format_recognized = TRUE;
}
WebPFreeDecBuffer (&config.output);
}
}
#endif /* HAVE_LIBWEBP */
else if ((size >= 26)
&& (strncmp ((char *) buffer, "gimp xcf ", 9) == 0))
{
/* XCF */
GInputStream *mem_stream;
GDataInputStream *data_stream;
mem_stream = g_memory_input_stream_new_from_data (buffer, BUFFER_SIZE, NULL);
data_stream = g_data_input_stream_new (mem_stream);
g_data_input_stream_set_byte_order (data_stream, G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN);
if (g_seekable_seek (G_SEEKABLE (data_stream), 14, G_SEEK_SET, NULL, NULL)) {
int base_type;
width = g_data_input_stream_read_uint32 (data_stream, NULL, NULL);
height = g_data_input_stream_read_uint32 (data_stream, NULL, NULL);
base_type = g_data_input_stream_read_uint32 (data_stream, NULL, NULL);
if (base_type == 0)
description = "XCF RGB";
else if (base_type == 1)
description = "XCF grayscale";
else if (base_type == 2)
description = "XCF indexed";
else
description = "XCF";
mime_type = "image/x-xcf";
format_recognized = TRUE;
}
g_object_unref (data_stream);
g_object_unref (mem_stream);
}
}
g_free (buffer);
g_object_unref (stream);
}
if (! format_recognized) { /* use gdk_pixbuf_get_file_info */
char *filename;
filename = g_file_get_path (file_data->file);
if (filename != NULL) {
GdkPixbufFormat *format;
format = gdk_pixbuf_get_file_info (filename, &width, &height);
if (format != NULL) {
format_recognized = TRUE;
description = gdk_pixbuf_format_get_description (format);
}
g_free (filename);
}
}
if (format_recognized) {
char *size;
g_file_info_set_attribute_string (file_data->info, "general::format", description);
g_file_info_set_attribute_int32 (file_data->info, "image::width", width);
g_file_info_set_attribute_int32 (file_data->info, "image::height", height);
g_file_info_set_attribute_int32 (file_data->info, "frame::width", width);
g_file_info_set_attribute_int32 (file_data->info, "frame::height", height);
if (mime_type != NULL)
gth_file_data_set_mime_type (file_data, mime_type);
size = g_strdup_printf (_("%d × %d"), width, height);
g_file_info_set_attribute_string (file_data->info, "general::dimensions", size);
g_free (size);
}
}
