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glib/gio/gfileattribute.c
Ryan Lortie fe7069749f file-info: Add a G_FILE_ATTRIBUTE_THUMBNAIL_IS_VALID attribute 
This indicates whether the thumbnail (given by G_FILE_ATTRIBUTE_THUMBNAIL_PATH)
is valid — i.e. to represent the file in its current state. If
G_FILE_ATTRIBUTE_THUMBNAIL_IS_VALID is FALSE (for a normal _or_ failed
thumbnail) it means the file has changed since the thumbnail was generated, and
the thumbnail is out of date.

Part of checking thumbnail validity (by the spec) involves parsing
headers out of the thumbnail .png so we include some (small) code to do
that in a separate file.  We will likely want to copy this code to gvfs
to do the same for GVfsFile.

Heavily based on a patch from Philip Withnall <philip.withnall@collabora.co.uk>
who suggested the feature and designed the API.

https://bugzilla.gnome.org/show_bug.cgi?id=709898
2013-10-23 11:56:28 -04:00

1060 lines
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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include <string.h>
#include "gfileattribute.h"
#include "gfileattribute-priv.h"
#include <glib-object.h>
#include "glibintl.h"
/**
* SECTION:gfileattribute
* @short_description: Key-Value Paired File Attributes
* @include: gio/gio.h
* @see_also: #GFile, #GFileInfo
*
* File attributes in GIO consist of a list of key-value pairs.
*
* Keys are strings that contain a key namespace and a key name, separated
* by a colon, e.g. "namespace::keyname". Namespaces are included to sort
* key-value pairs by namespaces for relevance. Keys can be retrived
* using wildcards, e.g. "standard::*" will return all of the keys in the
* "standard" namespace.
*
* The list of possible attributes for a filesystem (pointed to by a #GFile) is
* available as a #GFileAttributeInfoList. This list is queryable by key names
* as indicated earlier.
*
* Information is stored within the list in #GFileAttributeInfo structures.
* The info structure can store different types, listed in the enum
* #GFileAttributeType. Upon creation of a #GFileAttributeInfo, the type will
* be set to %G_FILE_ATTRIBUTE_TYPE_INVALID.
*
* Classes that implement #GFileIface will create a #GFileAttributeInfoList and
* install default keys and values for their given file system, architecture,
* and other possible implementation details (e.g., on a UNIX system, a file
* attribute key will be registered for the user id for a given file).
*
* <para>
* <table>
* <title>GFileAttributes Default Namespaces</title>
* <tgroup cols='2' align='left'><thead>
* <row><entry>Namspace</entry><entry>Description</entry></row>
* </thead>
* <tbody>
* <row><entry>"standard"</entry><entry>The "Standard" namespace. General file
* information that any application may need should be put in this namespace.
* Examples include the file's name, type, and size.</entry></row>
* <row><entry>"etag"</entry><entry>The <link linkend="gfile-etag">"Entity Tag"</link>
* namespace. Currently, the only key in this namespace is "value", which contains
* the value of the current entity tag.</entry></row>
* <row><entry>"id"</entry><entry>The "Identification" namespace. This
* namespace is used by file managers and applications that list directories
* to check for loops and to uniquely identify files.</entry></row>
* <row><entry>"access"</entry><entry>The "Access" namespace. Used to check
* if a user has the proper privilidges to access files and perform
* file operations. Keys in this namespace are made to be generic
* and easily understood, e.g. the "can_read" key is %TRUE if
* the current user has permission to read the file. UNIX permissions and
* NTFS ACLs in Windows should be mapped to these values.</entry></row>
* <row><entry>"mountable"</entry><entry>The "Mountable" namespace. Includes
* simple boolean keys for checking if a file or path supports mount operations, e.g.
* mount, unmount, eject. These are used for files of type %G_FILE_TYPE_MOUNTABLE.</entry></row>
* <row><entry>"time"</entry><entry>The "Time" namespace. Includes file
* access, changed, created times. </entry></row>
* <row><entry>"unix"</entry><entry>The "Unix" namespace. Includes UNIX-specific
* information and may not be available for all files. Examples include
* the UNIX "UID", "GID", etc.</entry></row>
* <row><entry>"dos"</entry><entry>The "DOS" namespace. Includes DOS-specific
* information and may not be available for all files. Examples include
* "is_system" for checking if a file is marked as a system file, and "is_archive"
* for checking if a file is marked as an archive file.</entry></row>
* <row><entry>"owner"</entry><entry>The "Owner" namespace. Includes information
* about who owns a file. May not be available for all file systems. Examples include
* "user" for getting the user name of the file owner. This information is often mapped from
* some backend specific data such as a unix UID.</entry></row>
* <row><entry>"thumbnail"</entry><entry>The "Thumbnail" namespace. Includes
* information about file thumbnails and their location within the file system. Examples of
* keys in this namespace include "path" to get the location of a thumbnail, "failed"
* to check if thumbnailing of the file failed, and "is-valid" to check if the thumbnail is
* outdated.</entry></row>
* <row><entry>"filesystem"</entry><entry>The "Filesystem" namespace. Gets information
* about the file system where a file is located, such as its type, how much
* space is left available, and the overall size of the file system.</entry></row>
* <row><entry>"gvfs"</entry><entry>The "GVFS" namespace. Keys in this namespace
* contain information about the current GVFS backend in use. </entry></row>
* <row><entry>"xattr"</entry><entry>The "xattr" namespace. Gets information
* about extended user attributes. See attr(5). The "user." prefix of the
* extended user attribute name is stripped away when constructing keys in
* this namespace, e.g. "xattr::mime_type" for the extended attribute with
* the name "user.mime_type". Note that this information is only available
* if GLib has been built with extended attribute support.</entry></row>
* <row><entry>"xattr-sys"</entry><entry>The "xattr-sys" namespace.
* Gets information about extended attributes which are not user-specific.
* See attr(5). Note that this information is only available if GLib
* has been built with extended attribute support.</entry></row>
* <row><entry>"selinux"</entry><entry>The "SELinux" namespace. Includes
* information about the SELinux context of files. Note that this information
* is only available if GLib has been built with SELinux support.</entry></row>
* </tbody>
* </tgroup>
* </table>
* </para>
*
* Please note that these are not all of the possible namespaces.
* More namespaces can be added from GIO modules or by individual applications.
* For more information about writing GIO modules, see #GIOModule.
*
* <!-- TODO: Implementation note about using extended attributes on supported
* file systems -->
*
* <para><table>
* <title>GFileAttributes Built-in Keys and Value Types</title>
* <tgroup cols='3' align='left'><thead>
* <row><entry>Enum Value</entry><entry>Namespace::Key</entry><entry>Value Type</entry></row>
* </thead><tbody>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_TYPE</entry><entry>standard::type</entry><entry>uint32 (#GFileType)</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN</entry><entry>standard::is-hidden</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_BACKUP</entry><entry>standard::is-backup</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_SYMLINK</entry><entry>standard::is-symlink</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_IS_VIRTUAL</entry><entry>standard::is-virtual</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_NAME</entry><entry>standard::name</entry><entry>byte string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME</entry><entry>standard::display-name</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_EDIT_NAME</entry><entry>standard::edit-name</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_ICON</entry><entry>standard::icon</entry><entry>object (#GIcon)</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE</entry><entry>standard::content-type</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_FAST_CONTENT_TYPE</entry><entry>standard::fast-content-type</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_SIZE</entry><entry>standard::size</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_ALLOCATED_SIZE</entry><entry>standard::allocated-size</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_SYMLINK_TARGET</entry><entry>standard::symlink-target</entry><entry>byte string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_TARGET_URI</entry><entry>standard::target-uri</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_STANDARD_SORT_ORDER</entry><entry>standard::sort-order</entry><entry>int32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ETAG_VALUE</entry><entry>etag::value</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ID_FILE</entry><entry>id::file</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ID_FILESYSTEM</entry><entry>id::filesystem</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_READ</entry><entry>access::can-read</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE</entry><entry>access::can-write</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE</entry><entry>access::can-execute</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_DELETE</entry><entry>access::can-delete</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH</entry><entry>access::can-trash</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_ACCESS_CAN_RENAME</entry><entry>access::can-rename</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_CAN_MOUNT</entry><entry>mountable::can-mount</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_CAN_UNMOUNT</entry><entry>mountable::can-unmount</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_CAN_EJECT</entry><entry>mountable::can-eject</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_UNIX_DEVICE</entry><entry>mountable::unix-device</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_UNIX_DEVICE_FILE</entry><entry>mountable::unix-device-file</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_MOUNTABLE_HAL_UDI</entry><entry>mountable::hal-udi</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_MODIFIED</entry><entry>time::modified</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_MODIFIED_USEC</entry><entry>time::modified-usec</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_ACCESS</entry><entry>time::access</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_ACCESS_USEC</entry><entry>time::access-usec</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_CHANGED</entry><entry>time::changed</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_CHANGED_USEC</entry><entry>time::changed-usec</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_CREATED</entry><entry>time::created</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_TIME_CREATED_USEC</entry><entry>time::created-usec</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_DEVICE</entry><entry>unix::device</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_INODE</entry><entry>unix::inode</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_MODE</entry><entry>unix::mode</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_NLINK</entry><entry>unix::nlink</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_UID</entry><entry>unix::uid</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_GID</entry><entry>unix::gid</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_RDEV</entry><entry>unix::rdev</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_BLOCK_SIZE</entry><entry>unix::block-size</entry><entry>uint32</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_BLOCKS</entry><entry>unix::blocks</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_UNIX_IS_MOUNTPOINT</entry><entry>unix::is-mountpoint</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_DOS_IS_ARCHIVE</entry><entry>dos::is-archive</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_DOS_IS_SYSTEM</entry><entry>dos::is-system</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_OWNER_USER</entry><entry>owner::user</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_OWNER_USER_REAL</entry><entry>owner::user-real</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_OWNER_GROUP</entry><entry>owner::group</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_THUMBNAIL_PATH</entry><entry>thumbnail::path</entry><entry>bytestring</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_THUMBNAILING_FAILED</entry><entry>thumbnail::failed</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_THUMBNAIL_IS_VALID</entry><entry>thumbnail::is-valid</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_PREVIEW_ICON</entry><entry>preview::icon</entry><entry>object (#GIcon)</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_SIZE</entry><entry>filesystem::size</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_FREE</entry><entry>filesystem::free</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_USED</entry><entry>filesystem::used</entry><entry>uint64</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_TYPE</entry><entry>filesystem::type</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_FILESYSTEM_READONLY</entry><entry>filesystem::readonly</entry><entry>boolean</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_GVFS_BACKEND</entry><entry>gvfs::backend</entry><entry>string</entry></row>
* <row><entry>%G_FILE_ATTRIBUTE_SELINUX_CONTEXT</entry><entry>selinux::context</entry><entry>string</entry></row>
* </tbody></tgroup></table></para>
*
* Note that there are no predefined keys in the "xattr" and "xattr-sys"
* namespaces. Keys for the "xattr" namespace are constructed by stripping
* away the "user." prefix from the extended user attribute, and prepending
* "xattr::". Keys for the "xattr-sys" namespace are constructed by
* concatenating "xattr-sys::" with the extended attribute name. All extended
* attribute values are returned as hex-encoded strings in which bytes outside
* the ASCII range are encoded as hexadecimal escape sequences of the form
* \x<replaceable>nn</replaceable>.
**/
/*
* _g_file_attribute_value_free:
* @attr: a #GFileAttributeValue.
*
* Frees the memory used by @attr.
*
**/
void
_g_file_attribute_value_free (GFileAttributeValue *attr)
{
g_return_if_fail (attr != NULL);
_g_file_attribute_value_clear (attr);
g_free (attr);
}
/*
* _g_file_attribute_value_clear:
* @attr: a #GFileAttributeValue.
*
* Clears the value of @attr and sets its type to
* %G_FILE_ATTRIBUTE_TYPE_INVALID.
*
**/
void
_g_file_attribute_value_clear (GFileAttributeValue *attr)
{
g_return_if_fail (attr != NULL);
if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRING ||
attr->type == G_FILE_ATTRIBUTE_TYPE_BYTE_STRING)
g_free (attr->u.string);
if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRINGV)
g_strfreev (attr->u.stringv);
if (attr->type == G_FILE_ATTRIBUTE_TYPE_OBJECT &&
attr->u.obj != NULL)
g_object_unref (attr->u.obj);
attr->type = G_FILE_ATTRIBUTE_TYPE_INVALID;
}
/*
* g_file_attribute_value_set:
* @attr: a #GFileAttributeValue to set the value in.
* @new_value: a #GFileAttributeValue to get the value from.
*
* Sets an attribute's value from another attribute.
**/
void
_g_file_attribute_value_set (GFileAttributeValue *attr,
const GFileAttributeValue *new_value)
{
g_return_if_fail (attr != NULL);
g_return_if_fail (new_value != NULL);
_g_file_attribute_value_clear (attr);
*attr = *new_value;
if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRING ||
attr->type == G_FILE_ATTRIBUTE_TYPE_BYTE_STRING)
attr->u.string = g_strdup (attr->u.string);
if (attr->type == G_FILE_ATTRIBUTE_TYPE_STRINGV)
attr->u.stringv = g_strdupv (attr->u.stringv);
if (attr->type == G_FILE_ATTRIBUTE_TYPE_OBJECT &&
attr->u.obj != NULL)
g_object_ref (attr->u.obj);
}
/*
* _g_file_attribute_value_new:
*
* Creates a new file attribute.
*
* Returns: a #GFileAttributeValue.
**/
GFileAttributeValue *
_g_file_attribute_value_new (void)
{
GFileAttributeValue *attr;
attr = g_new (GFileAttributeValue, 1);
attr->type = G_FILE_ATTRIBUTE_TYPE_INVALID;
return attr;
}
gpointer
_g_file_attribute_value_peek_as_pointer (GFileAttributeValue *attr)
{
switch (attr->type) {
case G_FILE_ATTRIBUTE_TYPE_STRING:
case G_FILE_ATTRIBUTE_TYPE_BYTE_STRING:
return attr->u.string;
case G_FILE_ATTRIBUTE_TYPE_STRINGV:
return attr->u.stringv;
case G_FILE_ATTRIBUTE_TYPE_OBJECT:
return attr->u.obj;
default:
return (gpointer) &attr->u;
}
}
/*
* g_file_attribute_value_dup:
* @other: a #GFileAttributeValue to duplicate.
*
* Duplicates a file attribute.
*
* Returns: a duplicate of the @other.
**/
GFileAttributeValue *
_g_file_attribute_value_dup (const GFileAttributeValue *other)
{
GFileAttributeValue *attr;
g_return_val_if_fail (other != NULL, NULL);
attr = g_new (GFileAttributeValue, 1);
attr->type = G_FILE_ATTRIBUTE_TYPE_INVALID;
_g_file_attribute_value_set (attr, other);
return attr;
}
G_DEFINE_BOXED_TYPE (GFileAttributeInfoList, g_file_attribute_info_list,
g_file_attribute_info_list_dup,
g_file_attribute_info_list_unref)
static gboolean
valid_char (char c)
{
return c >= 32 && c <= 126 && c != '\\';
}
static char *
escape_byte_string (const char *str)
{
size_t len;
int num_invalid, i;
char *escaped_val, *p;
unsigned char c;
const char hex_digits[] = "0123456789abcdef";
len = strlen (str);
num_invalid = 0;
for (i = 0; i < len; i++)
{
if (!valid_char (str[i]))
num_invalid++;
}
if (num_invalid == 0)
return g_strdup (str);
else
{
escaped_val = g_malloc (len + num_invalid*3 + 1);
p = escaped_val;
for (i = 0; i < len; i++)
{
c = str[i];
if (valid_char (c))
*p++ = c;
else
{
*p++ = '\\';
*p++ = 'x';
*p++ = hex_digits[(c >> 4) & 0xf];
*p++ = hex_digits[c & 0xf];
}
}
*p++ = 0;
return escaped_val;
}
}
/*
* _g_file_attribute_value_as_string:
* @attr: a #GFileAttributeValue.
*
* Converts a #GFileAttributeValue to a string for display.
* The returned string should be freed when no longer needed.
*
* Returns: a string from the @attr, %NULL on error, or "&lt;invalid&gt;"
* if @attr is of type %G_FILE_ATTRIBUTE_TYPE_INVALID.
*/
char *
_g_file_attribute_value_as_string (const GFileAttributeValue *attr)
{
GString *s;
int i;
char *str;
g_return_val_if_fail (attr != NULL, NULL);
switch (attr->type)
{
case G_FILE_ATTRIBUTE_TYPE_STRING:
str = g_strdup (attr->u.string);
break;
case G_FILE_ATTRIBUTE_TYPE_STRINGV:
s = g_string_new ("[");
for (i = 0; attr->u.stringv[i] != NULL; i++)
{
g_string_append (s, attr->u.stringv[i]);
if (attr->u.stringv[i+1] != NULL)
g_string_append (s, ", ");
}
g_string_append (s, "]");
str = g_string_free (s, FALSE);
break;
case G_FILE_ATTRIBUTE_TYPE_BYTE_STRING:
str = escape_byte_string (attr->u.string);
break;
case G_FILE_ATTRIBUTE_TYPE_BOOLEAN:
str = g_strdup_printf ("%s", attr->u.boolean?"TRUE":"FALSE");
break;
case G_FILE_ATTRIBUTE_TYPE_UINT32:
str = g_strdup_printf ("%u", (unsigned int)attr->u.uint32);
break;
case G_FILE_ATTRIBUTE_TYPE_INT32:
str = g_strdup_printf ("%i", (int)attr->u.int32);
break;
case G_FILE_ATTRIBUTE_TYPE_UINT64:
str = g_strdup_printf ("%"G_GUINT64_FORMAT, attr->u.uint64);
break;
case G_FILE_ATTRIBUTE_TYPE_INT64:
str = g_strdup_printf ("%"G_GINT64_FORMAT, attr->u.int64);
break;
case G_FILE_ATTRIBUTE_TYPE_OBJECT:
str = g_strdup_printf ("%s:%p", g_type_name_from_instance
((GTypeInstance *) attr->u.obj),
attr->u.obj);
break;
case G_FILE_ATTRIBUTE_TYPE_INVALID:
str = g_strdup ("<unset>");
break;
default:
g_warning ("Invalid type in GFileInfo attribute");
str = g_strdup ("<invalid>");
break;
}
return str;
}
/*
* _g_file_attribute_value_get_string:
* @attr: a #GFileAttributeValue.
*
* Gets the string from a file attribute value. If the value is not the
* right type then %NULL will be returned.
*
* Returns: the UTF-8 string value contained within the attribute, or %NULL.
*/
const char *
_g_file_attribute_value_get_string (const GFileAttributeValue *attr)
{
if (attr == NULL)
return NULL;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_STRING, NULL);
return attr->u.string;
}
/*
* _g_file_attribute_value_get_byte_string:
* @attr: a #GFileAttributeValue.
*
* Gets the byte string from a file attribute value. If the value is not the
* right type then %NULL will be returned.
*
* Returns: the byte string contained within the attribute or %NULL.
*/
const char *
_g_file_attribute_value_get_byte_string (const GFileAttributeValue *attr)
{
if (attr == NULL)
return NULL;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_BYTE_STRING, NULL);
return attr->u.string;
}
char **
_g_file_attribute_value_get_stringv (const GFileAttributeValue *attr)
{
if (attr == NULL)
return NULL;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_STRINGV, NULL);
return attr->u.stringv;
}
/*
* _g_file_attribute_value_get_boolean:
* @attr: a #GFileAttributeValue.
*
* Gets the boolean value from a file attribute value. If the value is not the
* right type then %FALSE will be returned.
*
* Returns: the boolean value contained within the attribute, or %FALSE.
*/
gboolean
_g_file_attribute_value_get_boolean (const GFileAttributeValue *attr)
{
if (attr == NULL)
return FALSE;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_BOOLEAN, FALSE);
return attr->u.boolean;
}
/*
* _g_file_attribute_value_get_uint32:
* @attr: a #GFileAttributeValue.
*
* Gets the unsigned 32-bit integer from a file attribute value. If the value
* is not the right type then 0 will be returned.
*
* Returns: the unsigned 32-bit integer from the attribute, or 0.
*/
guint32
_g_file_attribute_value_get_uint32 (const GFileAttributeValue *attr)
{
if (attr == NULL)
return 0;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_UINT32, 0);
return attr->u.uint32;
}
/*
* _g_file_attribute_value_get_int32:
* @attr: a #GFileAttributeValue.
*
* Gets the signed 32-bit integer from a file attribute value. If the value
* is not the right type then 0 will be returned.
*
* Returns: the signed 32-bit integer from the attribute, or 0.
*/
gint32
_g_file_attribute_value_get_int32 (const GFileAttributeValue *attr)
{
if (attr == NULL)
return 0;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_INT32, 0);
return attr->u.int32;
}
/*
* _g_file_attribute_value_get_uint64:
* @attr: a #GFileAttributeValue.
*
* Gets the unsigned 64-bit integer from a file attribute value. If the value
* is not the right type then 0 will be returned.
*
* Returns: the unsigned 64-bit integer from the attribute, or 0.
*/
guint64
_g_file_attribute_value_get_uint64 (const GFileAttributeValue *attr)
{
if (attr == NULL)
return 0;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_UINT64, 0);
return attr->u.uint64;
}
/*
* _g_file_attribute_value_get_int64:
* @attr: a #GFileAttributeValue.
*
* Gets the signed 64-bit integer from a file attribute value. If the value
* is not the right type then 0 will be returned.
*
* Returns: the signed 64-bit integer from the attribute, or 0.
*/
gint64
_g_file_attribute_value_get_int64 (const GFileAttributeValue *attr)
{
if (attr == NULL)
return 0;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_INT64, 0);
return attr->u.int64;
}
/*
* _g_file_attribute_value_get_object:
* @attr: a #GFileAttributeValue.
*
* Gets the GObject from a file attribute value. If the value
* is not the right type then %NULL will be returned.
*
* Returns: the GObject from the attribute, or %NULL.
**/
GObject *
_g_file_attribute_value_get_object (const GFileAttributeValue *attr)
{
if (attr == NULL)
return NULL;
g_return_val_if_fail (attr->type == G_FILE_ATTRIBUTE_TYPE_OBJECT, NULL);
return attr->u.obj;
}
void
_g_file_attribute_value_set_from_pointer (GFileAttributeValue *value,
GFileAttributeType type,
gpointer value_p,
gboolean dup)
{
_g_file_attribute_value_clear (value);
value->type = type;
switch (type)
{
case G_FILE_ATTRIBUTE_TYPE_STRING:
case G_FILE_ATTRIBUTE_TYPE_BYTE_STRING:
if (dup)
value->u.string = g_strdup (value_p);
else
value->u.string = value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_STRINGV:
if (dup)
value->u.stringv = g_strdupv (value_p);
else
value->u.stringv = value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_OBJECT:
if (dup)
value->u.obj = g_object_ref (value_p);
else
value->u.obj = value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_BOOLEAN:
value->u.boolean = *(gboolean *)value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_UINT32:
value->u.uint32 = *(guint32 *)value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_INT32:
value->u.int32 = *(gint32 *)value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_UINT64:
value->u.uint64 = *(guint64 *)value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_INT64:
value->u.int64 = *(gint64 *)value_p;
break;
case G_FILE_ATTRIBUTE_TYPE_INVALID:
break;
default:
g_warning ("Unknown type specified in g_file_info_set_attribute\n");
break;
}
}
/*
* _g_file_attribute_value_set_string:
* @attr: a #GFileAttributeValue.
* @string: a UTF-8 string to set within the type.
*
* Sets the attribute value to a given UTF-8 string.
*/
void
_g_file_attribute_value_set_string (GFileAttributeValue *attr,
const char *string)
{
g_return_if_fail (attr != NULL);
g_return_if_fail (string != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_STRING;
attr->u.string = g_strdup (string);
}
/*
* _g_file_attribute_value_set_byte_string:
* @attr: a #GFileAttributeValue.
* @string: a byte string to set within the type.
*
* Sets the attribute value to a given byte string.
*/
void
_g_file_attribute_value_set_byte_string (GFileAttributeValue *attr,
const char *string)
{
g_return_if_fail (attr != NULL);
g_return_if_fail (string != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_BYTE_STRING;
attr->u.string = g_strdup (string);
}
void
_g_file_attribute_value_set_stringv (GFileAttributeValue *attr,
char **value)
{
g_return_if_fail (attr != NULL);
g_return_if_fail (value != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_STRINGV;
attr->u.stringv = g_strdupv (value);
}
/*
* _g_file_attribute_value_set_boolean:
* @attr: a #GFileAttributeValue.
* @value: a #gboolean to set within the type.
*
* Sets the attribute value to the given boolean value.
*/
void
_g_file_attribute_value_set_boolean (GFileAttributeValue *attr,
gboolean value)
{
g_return_if_fail (attr != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_BOOLEAN;
attr->u.boolean = !!value;
}
/*
* _g_file_attribute_value_set_uint32:
* @attr: a #GFileAttributeValue.
* @value: a #guint32 to set within the type.
*
* Sets the attribute value to the given unsigned 32-bit integer.
*/
void
_g_file_attribute_value_set_uint32 (GFileAttributeValue *attr,
guint32 value)
{
g_return_if_fail (attr != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_UINT32;
attr->u.uint32 = value;
}
/*
* _g_file_attribute_value_set_int32:
* @attr: a #GFileAttributeValue.
* @value: a #gint32 to set within the type.
*
* Sets the attribute value to the given signed 32-bit integer.
*/
void
_g_file_attribute_value_set_int32 (GFileAttributeValue *attr,
gint32 value)
{
g_return_if_fail (attr != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_INT32;
attr->u.int32 = value;
}
/*
* _g_file_attribute_value_set_uint64:
* @attr: a #GFileAttributeValue.
* @value: a #guint64 to set within the type.
*
* Sets the attribute value to a given unsigned 64-bit integer.
*/
void
_g_file_attribute_value_set_uint64 (GFileAttributeValue *attr,
guint64 value)
{
g_return_if_fail (attr != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_UINT64;
attr->u.uint64 = value;
}
/*
* _g_file_attribute_value_set_int64:
* @attr: a #GFileAttributeValue.
* @value: a #gint64 to set within the type.
*
* Sets the attribute value to a given signed 64-bit integer.
*/
void
_g_file_attribute_value_set_int64 (GFileAttributeValue *attr,
gint64 value)
{
g_return_if_fail (attr != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_INT64;
attr->u.int64 = value;
}
/*
* _g_file_attribute_value_set_object:
* @attr: a #GFileAttributeValue.
* @obj: a #GObject.
*
* Sets the attribute to contain the value @obj.
* The @attr references the GObject internally.
*/
void
_g_file_attribute_value_set_object (GFileAttributeValue *attr,
GObject *obj)
{
g_return_if_fail (attr != NULL);
g_return_if_fail (obj != NULL);
_g_file_attribute_value_clear (attr);
attr->type = G_FILE_ATTRIBUTE_TYPE_OBJECT;
attr->u.obj = g_object_ref (obj);
}
typedef struct {
GFileAttributeInfoList public;
GArray *array;
int ref_count;
} GFileAttributeInfoListPriv;
static void
list_update_public (GFileAttributeInfoListPriv *priv)
{
priv->public.infos = (GFileAttributeInfo *)priv->array->data;
priv->public.n_infos = priv->array->len;
}
/**
* g_file_attribute_info_list_new:
*
* Creates a new file attribute info list.
*
* Returns: a #GFileAttributeInfoList.
*/
GFileAttributeInfoList *
g_file_attribute_info_list_new (void)
{
GFileAttributeInfoListPriv *priv;
priv = g_new0 (GFileAttributeInfoListPriv, 1);
priv->ref_count = 1;
priv->array = g_array_new (TRUE, FALSE, sizeof (GFileAttributeInfo));
list_update_public (priv);
return (GFileAttributeInfoList *)priv;
}
/**
* g_file_attribute_info_list_dup:
* @list: a #GFileAttributeInfoList to duplicate.
*
* Makes a duplicate of a file attribute info list.
*
* Returns: a copy of the given @list.
*/
GFileAttributeInfoList *
g_file_attribute_info_list_dup (GFileAttributeInfoList *list)
{
GFileAttributeInfoListPriv *new;
int i;
g_return_val_if_fail (list != NULL, NULL);
new = g_new0 (GFileAttributeInfoListPriv, 1);
new->ref_count = 1;
new->array = g_array_new (TRUE, FALSE, sizeof (GFileAttributeInfo));
g_array_set_size (new->array, list->n_infos);
list_update_public (new);
for (i = 0; i < list->n_infos; i++)
{
new->public.infos[i].name = g_strdup (list->infos[i].name);
new->public.infos[i].type = list->infos[i].type;
new->public.infos[i].flags = list->infos[i].flags;
}
return (GFileAttributeInfoList *)new;
}
/**
* g_file_attribute_info_list_ref:
* @list: a #GFileAttributeInfoList to reference.
*
* References a file attribute info list.
*
* Returns: #GFileAttributeInfoList or %NULL on error.
*/
GFileAttributeInfoList *
g_file_attribute_info_list_ref (GFileAttributeInfoList *list)
{
GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
g_return_val_if_fail (list != NULL, NULL);
g_return_val_if_fail (priv->ref_count > 0, NULL);
g_atomic_int_inc (&priv->ref_count);
return list;
}
/**
* g_file_attribute_info_list_unref:
* @list: The #GFileAttributeInfoList to unreference.
*
* Removes a reference from the given @list. If the reference count
* falls to zero, the @list is deleted.
*/
void
g_file_attribute_info_list_unref (GFileAttributeInfoList *list)
{
GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
int i;
g_return_if_fail (list != NULL);
g_return_if_fail (priv->ref_count > 0);
if (g_atomic_int_dec_and_test (&priv->ref_count))
{
for (i = 0; i < list->n_infos; i++)
g_free (list->infos[i].name);
g_array_free (priv->array, TRUE);
g_free (list);
}
}
static int
g_file_attribute_info_list_bsearch (GFileAttributeInfoList *list,
const char *name)
{
int start, end, mid;
start = 0;
end = list->n_infos;
while (start != end)
{
mid = start + (end - start) / 2;
if (strcmp (name, list->infos[mid].name) < 0)
end = mid;
else if (strcmp (name, list->infos[mid].name) > 0)
start = mid + 1;
else
return mid;
}
return start;
}
/**
* g_file_attribute_info_list_lookup:
* @list: a #GFileAttributeInfoList.
* @name: the name of the attribute to lookup.
*
* Gets the file attribute with the name @name from @list.
*
* Returns: a #GFileAttributeInfo for the @name, or %NULL if an
* attribute isn't found.
*/
const GFileAttributeInfo *
g_file_attribute_info_list_lookup (GFileAttributeInfoList *list,
const char *name)
{
int i;
g_return_val_if_fail (list != NULL, NULL);
g_return_val_if_fail (name != NULL, NULL);
i = g_file_attribute_info_list_bsearch (list, name);
if (i < list->n_infos && strcmp (list->infos[i].name, name) == 0)
return &list->infos[i];
return NULL;
}
/**
* g_file_attribute_info_list_add:
* @list: a #GFileAttributeInfoList.
* @name: the name of the attribute to add.
* @type: the #GFileAttributeType for the attribute.
* @flags: #GFileAttributeInfoFlags for the attribute.
*
* Adds a new attribute with @name to the @list, setting
* its @type and @flags.
*/
void
g_file_attribute_info_list_add (GFileAttributeInfoList *list,
const char *name,
GFileAttributeType type,
GFileAttributeInfoFlags flags)
{
GFileAttributeInfoListPriv *priv = (GFileAttributeInfoListPriv *)list;
GFileAttributeInfo info;
int i;
g_return_if_fail (list != NULL);
g_return_if_fail (name != NULL);
i = g_file_attribute_info_list_bsearch (list, name);
if (i < list->n_infos && strcmp (list->infos[i].name, name) == 0)
{
list->infos[i].type = type;
return;
}
info.name = g_strdup (name);
info.type = type;
info.flags = flags;
g_array_insert_vals (priv->array, i, &info, 1);
list_update_public (priv);
}
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