/// See http://dartbug.com/22036 | |
library which.src.has_permission; | |
class FilePermission { | |
final int index; | |
final String _name; | |
const FilePermission._(this.index, this._name); | |
static const EXECUTE = const FilePermission._(0, 'EXECUTE'); | |
static const WRITE = const FilePermission._(1, 'WRITE'); | |
static const READ = const FilePermission._(2, 'READ'); | |
static const SET_UID = const FilePermission._(3, 'SET_UID'); | |
static const SET_GID = const FilePermission._(4, 'SET_GID'); | |
static const STICKY = const FilePermission._(5, 'STICKY'); | |
static const List<FilePermission> values = const [EXECUTE, WRITE, READ, SET_UID, SET_GID, STICKY]; | |
String toString() => 'FilePermission.$_name'; | |
} | |
class FilePermissionRole { | |
final int index; | |
final String _name; | |
const FilePermissionRole._(this.index, this._name); | |
static const WORLD = const FilePermissionRole._(0, 'WORLD'); | |
static const GROUP = const FilePermissionRole._(1, 'GROUP'); | |
static const OWNER = const FilePermissionRole._(2, 'OWNER'); | |
static const List<FilePermissionRole> values = const [WORLD, GROUP, OWNER]; | |
String toString() => 'FilePermissionRole.$_name'; | |
} | |
bool hasPermission(int fileStatMode, FilePermission permission, {FilePermissionRole role: FilePermissionRole.WORLD}) { | |
var bitIndex = _getPermissionBitIndex(permission, role); | |
return (fileStatMode & (1 << bitIndex)) != 0; | |
} | |
int _getPermissionBitIndex(FilePermission permission, FilePermissionRole role) { | |
switch (permission) { | |
case FilePermission.SET_UID: return 11; | |
case FilePermission.SET_GID: return 10; | |
case FilePermission.STICKY: return 9; | |
default: return (role.index * 3) + permission.index; | |
} | |
} |