Conoscere il tipo di file mediante le funzioni esterne del API di libgio
Da Gambas-it.org - Wikipedia.
Versione del 30 apr 2023 alle 08:00 di Vuott (Discussione | contributi)
La libreria Libgio fornisce un'astrazione del file system che permette alle applicazioni di accedere ai file locali e remoti.
E' possibile con alcune funzioni della libreria Libgio sapere a quale tipo un file appartiene. La tipologia è indicata nel file /usr/include/glib-2.0/gio/gioenums.h, ed è così specificata:
* GFileType: * @G_FILE_TYPE_UNKNOWN: File's type is unknown. * @G_FILE_TYPE_REGULAR: File handle represents a regular file. * @G_FILE_TYPE_DIRECTORY: File handle represents a directory. * @G_FILE_TYPE_SYMBOLIC_LINK: File handle represents a symbolic link * (Unix systems). * @G_FILE_TYPE_SPECIAL: File is a "special" file, such as a socket, fifo, * block device, or character device. * @G_FILE_TYPE_SHORTCUT: File is a shortcut (Windows systems). * @G_FILE_TYPE_MOUNTABLE: File is a mountable location.
E' necessario avere installata nel sistema e richiamare in Gambas la libreria condivisa: "libgio-2.0.so.0.7200.4 "
Mostriamo di seguito un semplice esempio pratico:
Library "libgio-2.0:0.7200.4" Private Enum G_FILE_QUERY_INFO_NONE = 0, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS ' GFile * g_file_new_for_path (const char *path) ' Constructs a GFile for a given path. This operation never fails. Private Extern g_file_new_for_path(path As String) As Pointer ' GFileType g_file_query_file_type (GFile *file, GFileQueryInfoFlags flags, GCancellable *cancellable) ' Inspects the GFileType of a file. Private Extern g_file_query_file_type(gfile As Pointer, flags As Integer, cancellable As Pointer) As Integer ' void g_object_unref (gpointer object) ' Decreases the reference count of object. Private Extern g_object_unref(gobject As Pointer) Public Sub Main() Dim gf As Pointer Dim tp As Integer Dim tipo as String[] = ["G_FILE_TYPE_UNKNOWN", "G_FILE_TYPE_REGULAR", "G_FILE_TYPE_DIRECTORY", "G_FILE_TYPE_SYMBOLIC_LINK", "G_FILE_TYPE_SPECIAL", "G_FILE_TYPE_SHORTCUT", "G_FILE_TYPE_MOUNTABLE"] gf = g_file_new_for_path("/percorso/del/file") If gf == 0 Then Error.Raise("Impossibile creare un oggetto GFile con il percorso del file impostato !") tp = g_file_query_file_type(gf, G_FILE_QUERY_INFO_NONE, 0) Print tipo[tp] g_object_unref(gf) End