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glib/gio/gfileattribute.c
Daniel Mustieles 078dbda148 Updated FSF's address
2014-01-31 14:31:55 +01:00

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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, see <http://www.gnu.org/licenses/>.
*
* 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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