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/*
This file is part of GNUnet.
(C) 2010 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file src/fs/gnunet-fs-gtk_common.c
* @brief Common functions used in various places
* @author Christian Grothoff
*/
#include "gnunet-fs-gtk-common.h"
/**
* Converts metadata specified by @data of size @data_len
* and saved in format @format to UTF-8 encoded string.
* Works only for C-string and UTF8 metadata formats
* (returns NULL for everything else).
* Verifies UTF-8 strings.
*
* @param format format of the @data
* @param data data to convert
* @param data_len length of the data buffer (in bytes)
* @return NULL if can't be converted, allocated string otherwise,
* freeable with GNUNET_free* ().
*/
char *
GNUNET_FS_GTK_dubious_meta_to_utf8 (enum EXTRACTOR_MetaFormat format,
const char *data, size_t data_len)
{
switch (format)
{
case EXTRACTOR_METAFORMAT_UTF8:
/* data must not contain NULLs (hence the -1) */
if (g_utf8_validate (data, data_len - 1, NULL))
return GNUNET_strdup (data);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Failed to validate supposedly utf-8 string `%s' of length %u, assuming it to be a C string\n"),
data,
(unsigned int) data_len);
format = EXTRACTOR_METAFORMAT_C_STRING;
/* fall-through */
case EXTRACTOR_METAFORMAT_C_STRING:
if (data_len > 0)
{
/* There are no guarantees that data is NULL-terminated, AFAIU,
* so let's play it safe, shall we?
*/
char data_copy[data_len + 1];
memcpy (data_copy, data, data_len);
data_copy[data_len] = '\0';
return GNUNET_GTK_from_loc_to_utf8 (data_copy);
}
break;
default:
break;
}
return NULL;
}
/**
* Add meta data to list store.
*
* @param cls closure (the GtkListStore)
* @param plugin_name name of the plugin that produced this value;
* special values can be used (i.e. '<zlib>' for zlib being
* used in the main libextractor library and yielding
* meta data).
* @param type libextractor-type describing the meta data
* @param format basic format information about data
* @param data_mime_type mime-type of data (not of the original file);
* can be NULL (if mime-type is not known)
* @param data actual meta-data found
* @param data_len number of bytes in data
* @return 0 to continue (always)
*/
int
GNUNET_FS_GTK_add_meta_data_to_list_store (void *cls, const char *plugin_name,
enum EXTRACTOR_MetaType type,
enum EXTRACTOR_MetaFormat format,
const char *data_mime_type,
const char *data, size_t data_len)
{
GtkListStore *ls = GTK_LIST_STORE (cls);
char *data_to_insert;
data_to_insert = GNUNET_FS_GTK_dubious_meta_to_utf8 (format, data, data_len);
if (NULL == data_to_insert)
return 0;
gtk_list_store_insert_with_values (ls, NULL, G_MAXINT, 0, type, 1, format,
2, EXTRACTOR_metatype_to_string (type),
3, data_to_insert, -1);
GNUNET_free (data_to_insert);
return 0;
}
/**
* Convert the year from the spin button to an expiration
* time (on midnight, January 1st of that year).
*
* @param spin button with an expiration year
* @return expiration time in the usual GNUnet format
*/
struct GNUNET_TIME_Absolute
GNUNET_FS_GTK_get_expiration_time (GtkSpinButton * spin)
{
struct GNUNET_TIME_Absolute ret;
int year;
year = gtk_spin_button_get_value_as_int (spin);
GNUNET_assert (year >= 0);
ret = GNUNET_FS_year_to_time ((unsigned int) year);
GNUNET_break (GNUNET_TIME_absolute_get ().abs_value < ret.abs_value);
return ret;
}
/**
* Initialize the 'expiration_year_adjustment' of the given
* builder to have a lower range of current-year+1 and a
* default of current-year+2.
*
* @param builder builder object for which we should manipulate
* the adjustment
*/
void
GNUNET_FS_GTK_setup_expiration_year_adjustment (GtkBuilder * builder)
{
GtkAdjustment *aj;
unsigned int year;
year = GNUNET_FS_get_current_year ();
aj = GTK_ADJUSTMENT (gtk_builder_get_object
(builder, "expiration_year_adjustment"));
gtk_adjustment_set_value (aj, year + 2);
gtk_adjustment_set_lower (aj, year + 1);
}
/**
* Obtain pixbuf from thumbnail data in meta data.
*
* @param meta input meta data
* @return NULL on error, otherwise the embedded thumbnail
*/
GdkPixbuf *
GNUNET_FS_GTK_get_thumbnail_from_meta_data (const struct
GNUNET_CONTAINER_MetaData *meta)
{
GdkPixbuf *pixbuf;
GdkPixbufLoader *loader;
size_t ts;
unsigned char *thumb;
thumb = NULL;
ts = GNUNET_CONTAINER_meta_data_get_thumbnail (meta, &thumb);
if (0 == ts)
return NULL;
loader = gdk_pixbuf_loader_new ();
gdk_pixbuf_loader_write (loader, (const guchar *) thumb, ts, NULL);
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
gdk_pixbuf_loader_close (loader, NULL);
if (NULL != pixbuf)
g_object_ref (pixbuf);
g_object_unref (loader);
GNUNET_free (thumb);
return pixbuf;
}
/**
* mmap the given file and run the GNUNET_FS_directory_list_contents
* function on it.
*
* @param filename name with the directory
* @param dep function to call on each entry
* @param dep_cls closure for 'dep'
*/
void
GNUNET_FS_GTK_mmap_and_scan (const char *filename,
GNUNET_FS_DirectoryEntryProcessor dep,
void *dep_cls)
{
struct GNUNET_DISK_FileHandle *fh;
struct GNUNET_DISK_MapHandle *mh;
uint64_t fsize;
void *ddata;
if (GNUNET_OK != GNUNET_DISK_file_size (filename, &fsize, GNUNET_YES))
{
GNUNET_break (0);
return;
}
if (NULL == (fh = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_READ,
GNUNET_DISK_PERM_NONE)))
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", filename);
return;
}
if (NULL == (ddata = GNUNET_DISK_file_map (fh, &mh, GNUNET_DISK_MAP_TYPE_READ, (size_t) fsize)))
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "mmap", filename);
GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
return;
}
if (GNUNET_SYSERR ==
GNUNET_FS_directory_list_contents ((size_t) fsize, ddata, 0, dep,
dep_cls))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Selected file `%s' is not a GNUnet directory!\n"), filename);
}
GNUNET_break (GNUNET_OK == GNUNET_DISK_file_unmap (mh));
GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
}
/* end of gnunet-fs-gtk-common.c */
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