Differenze tra le versioni di "Conoscere il tipo di file mediante le funzioni esterne del API di libgio"
Da Gambas-it.org - Wikipedia.
(Creata pagina con '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 lib...') |
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* @G_FILE_TYPE_MOUNTABLE: File is a mountable location. | * @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'' " | |
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Mostriamo di seguito un semplice esempio pratico: | Mostriamo di seguito un semplice esempio pratico: | ||
| − | Library "libgio-2.0:0. | + | Library "libgio-2.0:0.7200.4" |
Private Enum G_FILE_QUERY_INFO_NONE = 0, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS | Private Enum G_FILE_QUERY_INFO_NONE = 0, G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS | ||
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<FONT Color=gray>' ''GFile * g_file_new_for_path (const char *path)'' | <FONT Color=gray>' ''GFile * g_file_new_for_path (const char *path)'' | ||
' ''Constructs a GFile for a given path. This operation never fails.''</font> | ' ''Constructs a GFile for a given path. This operation never fails.''</font> | ||
| Riga 31: | Riga 27: | ||
' ''Inspects the GFileType of a file.''</font> | ' ''Inspects the GFileType of a file.''</font> | ||
Private Extern g_file_query_file_type(gfile As Pointer, flags As Integer, cancellable As Pointer) As Integer | Private Extern g_file_query_file_type(gfile As Pointer, flags As Integer, cancellable As Pointer) As Integer | ||
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| + | <FONT Color=gray>' ''void g_object_unref (gpointer object)'' | ||
| + | ' ''Decreases the reference count of object.''</font> | ||
| + | Private Extern g_object_unref(gobject As Pointer) | ||
| Riga 36: | Riga 36: | ||
Dim gf As Pointer | Dim gf As Pointer | ||
| − | Dim | + | 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("<FONT Color=gray>''/percorso/del/file''</font>") | |
| − | + | If gf == 0 Then Error.Raise("Impossibile creare un oggetto GFile con il percorso del file impostato !") | |
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| + | tp = g_file_query_file_type(gf, G_FILE_QUERY_INFO_NONE, 0) | ||
| − | + | Print tipo[tp] | |
| − | + | g_object_unref(gf) | |
'''End''' | '''End''' | ||
Versione attuale delle 08:00, 30 apr 2023
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
