summaryrefslogtreecommitdiffstats
path: root/src/dbus/qdbuserror.cpp
blob: 09e3450ecc9550cd762df5ea2802a7ed63f456f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdbuserror.h"

#include <qdebug.h>
#include <qvarlengtharray.h>

#include "qdbus_symbols_p.h"
#include "qdbusmessage.h"
#include "qdbusmessage_p.h"

#ifndef QT_NO_DBUS

QT_BEGIN_NAMESPACE

/*
 * Use the following Perl script to generate the error string index list:
===== PERL SCRIPT ====
print "static const char errorMessages_string[] =\n";
$counter = 0;
$i = 0;
while (<STDIN>) {
    chomp;
    print "    \"$_\\0\"\n";
    $sizes[$i++] = $counter;
    $counter += 1 + length $_;
}
print "    \"\\0\";\n\nstatic const int errorMessages_indices[] = {\n    ";
for ($j = 0; $j < $i; ++$j) {
    printf "$sizes[$j], ";
}
print "0\n};\n";
===== PERL SCRIPT ====
 
 * The input data is as follows:
other
org.freedesktop.DBus.Error.Failed
org.freedesktop.DBus.Error.NoMemory
org.freedesktop.DBus.Error.ServiceUnknown
org.freedesktop.DBus.Error.NoReply
org.freedesktop.DBus.Error.BadAddress
org.freedesktop.DBus.Error.NotSupported
org.freedesktop.DBus.Error.LimitsExceeded
org.freedesktop.DBus.Error.AccessDenied
org.freedesktop.DBus.Error.NoServer
org.freedesktop.DBus.Error.Timeout
org.freedesktop.DBus.Error.NoNetwork
org.freedesktop.DBus.Error.AddressInUse
org.freedesktop.DBus.Error.Disconnected
org.freedesktop.DBus.Error.InvalidArgs
org.freedesktop.DBus.Error.UnknownMethod
org.freedesktop.DBus.Error.TimedOut
org.freedesktop.DBus.Error.InvalidSignature
org.freedesktop.DBus.Error.UnknownInterface
com.trolltech.QtDBus.Error.InternalError
org.freedesktop.DBus.Error.UnknownObject
com.trolltech.QtDBus.Error.InvalidService
com.trolltech.QtDBus.Error.InvalidObjectPath
com.trolltech.QtDBus.Error.InvalidInterface
com.trolltech.QtDBus.Error.InvalidMember
*/

// in the same order as KnownErrors!
static const char errorMessages_string[] =
    "other\0"
    "org.freedesktop.DBus.Error.Failed\0"
    "org.freedesktop.DBus.Error.NoMemory\0"
    "org.freedesktop.DBus.Error.ServiceUnknown\0"
    "org.freedesktop.DBus.Error.NoReply\0"
    "org.freedesktop.DBus.Error.BadAddress\0"
    "org.freedesktop.DBus.Error.NotSupported\0"
    "org.freedesktop.DBus.Error.LimitsExceeded\0"
    "org.freedesktop.DBus.Error.AccessDenied\0"
    "org.freedesktop.DBus.Error.NoServer\0"
    "org.freedesktop.DBus.Error.Timeout\0"
    "org.freedesktop.DBus.Error.NoNetwork\0"
    "org.freedesktop.DBus.Error.AddressInUse\0"
    "org.freedesktop.DBus.Error.Disconnected\0"
    "org.freedesktop.DBus.Error.InvalidArgs\0"
    "org.freedesktop.DBus.Error.UnknownMethod\0"
    "org.freedesktop.DBus.Error.TimedOut\0"
    "org.freedesktop.DBus.Error.InvalidSignature\0"
    "org.freedesktop.DBus.Error.UnknownInterface\0"
    "com.trolltech.QtDBus.Error.InternalError\0"
    "org.freedesktop.DBus.Error.UnknownObject\0"
    "com.trolltech.QtDBus.Error.InvalidService\0"
    "com.trolltech.QtDBus.Error.InvalidObjectPath\0"
    "com.trolltech.QtDBus.Error.InvalidInterface\0"
    "com.trolltech.QtDBus.Error.InvalidMember\0"
    "\0";

static const int errorMessages_indices[] = {
       0,    6,   40,   76,  118,  153,  191,  231,
     273,  313,  349,  384,  421,  461,  501,  540,
     581,  617,  661,  705,  746,  787,  829,  874,
     918,    0
};

static const int errorMessages_count = sizeof errorMessages_indices /
                                       sizeof errorMessages_indices[0];

static inline const char *get(QDBusError::ErrorType code)
{
    int intcode = qBound(0, int(code) - int(QDBusError::Other), errorMessages_count);
    return errorMessages_string + errorMessages_indices[intcode];
}

static inline QDBusError::ErrorType get(const char *name)
{
    if (!name || !*name)
        return QDBusError::NoError;
    for (int i = 0; i < errorMessages_count; ++i)
        if (strcmp(name, errorMessages_string + errorMessages_indices[i]) == 0)
            return QDBusError::ErrorType(i + int(QDBusError::Other));
    return QDBusError::Other;
}

/*!
    \class QDBusError
    \inmodule QtDBus
    \since 4.2

    \brief The QDBusError class represents an error received from the
    D-Bus bus or from remote applications found in the bus.

    When dealing with the D-Bus bus service or with remote
    applications over D-Bus, a number of error conditions can
    happen. This error conditions are sometimes signalled by a
    returned error value or by a QDBusError.

    C++ and Java exceptions are a valid analogy for D-Bus errors:
    instead of returning normally with a return value, remote
    applications and the bus may decide to throw an error
    condition. However, the QtDBus implementation does not use the C++
    exception-throwing mechanism, so you will receive QDBusErrors in
    the return reply (see QDBusReply::error()).

    QDBusError objects are used to inspect the error name and message
    as received from the bus and remote applications. You should not
    create such objects yourself to signal error conditions when
    called from D-Bus: instead, use QDBusMessage::createError() and
    QDBusConnection::send().

    \sa QDBusConnection::send(), QDBusMessage, QDBusReply
*/

/*!
    \enum QDBusError::ErrorType

    In order to facilitate verification of the most common D-Bus errors generated by the D-Bus
    implementation and by the bus daemon itself, QDBusError can be compared to a set of pre-defined
    values:

    \value NoError              QDBusError is invalid (i.e., the call succeeded)
    \value Other                QDBusError contains an error that is one of the well-known ones
    \value Failed               The call failed (\c org.freedesktop.DBus.Error.Failed)
    \value NoMemory             Out of memory (\c org.freedesktop.DBus.Error.NoMemory)
    \value ServiceUnknown       The called service is not known
                                (\c org.freedesktop.DBus.Error.ServiceUnknown)
    \value NoReply              The called method did not reply within the specified timeout
                                (\c org.freedesktop.DBus.Error.NoReply)
    \value BadAddress           The address given is not valid
                                (\c org.freedesktop.DBus.Error.BadAddress)
    \value NotSupported         The call/operation is not supported
                                (\c org.freedesktop.DBus.Error.NotSupported)
    \value LimitsExceeded       The limits allocated to this process/call/connection exceeded the
                                pre-defined values (\c org.freedesktop.DBus.Error.LimitsExceeded)
    \value AccessDenied         The call/operation tried to access a resource it isn't allowed to
                                (\c org.freedesktop.DBus.Error.AccessDenied)
    \value NoServer             \e {Documentation doesn't say what this is for}
                                (\c org.freedesktop.DBus.Error.NoServer)
    \value Timeout              \e {Documentation doesn't say what this is for or how it's used}
                                (\c org.freedesktop.DBus.Error.Timeout)
    \value NoNetwork            \e {Documentation doesn't say what this is for}
                                (\c org.freedesktop.DBus.Error.NoNetwork)
    \value AddressInUse         QDBusServer tried to bind to an address that is already in use
                                (\c org.freedesktop.DBus.Error.AddressInUse)
    \value Disconnected         The call/process/message was sent after QDBusConnection disconnected
                                (\c org.freedesktop.DBus.Error.Disconnected)
    \value InvalidArgs          The arguments passed to this call/operation are not valid
                                (\c org.freedesktop.DBus.Error.InvalidArgs)
    \value UnknownMethod        The method called was not found in this object/interface with the
                                given parameters (\c org.freedesktop.DBus.Error.UnknownMethod)
    \value TimedOut             \e {Documentation doesn't say...}
                                (\c org.freedesktop.DBus.Error.TimedOut)
    \value InvalidSignature     The type signature is not valid or compatible
                                (\c org.freedesktop.DBus.Error.InvalidSignature)
    \value UnknownInterface     The interface is not known
    \value InternalError        An internal error occurred
                                (\c com.trolltech.QtDBus.Error.InternalError)

    \value InvalidObjectPath    The object path provided is invalid.

    \value InvalidService       The service requested is invalid.

    \value InvalidMember        The member is invalid.

    \value InvalidInterface     The interface is invalid.

    \value UnknownObject        The remote object could not be found.
*/

/*!
    \internal
    Constructs a QDBusError from a DBusError structure.
*/
QDBusError::QDBusError(const DBusError *error)
    : code(NoError)
{
    if (!error || !q_dbus_error_is_set(error))
        return;

    code = ::get(error->name);
    msg = QString::fromUtf8(error->message);
    nm = QString::fromUtf8(error->name);
}

/*!
    \internal
    Constructs a QDBusError from a QDBusMessage.
*/
QDBusError::QDBusError(const QDBusMessage &qdmsg)
    : code(NoError)
{
    if (qdmsg.type() != QDBusMessage::ErrorMessage)
        return;

    code = ::get(qdmsg.errorName().toUtf8().constData());
    nm = qdmsg.errorName();
    msg = qdmsg.errorMessage();
}

/*!
    \internal
    Constructs a QDBusError from a well-known error code
*/
QDBusError::QDBusError(ErrorType error, const QString &mess)
    : code(error)
{
    nm = QLatin1String(::get(error));
    msg = mess;
}

/*!
    \internal
    Constructs a QDBusError from another QDBusError object
*/
QDBusError::QDBusError(const QDBusError &other)
        : code(other.code), msg(other.msg), nm(other.nm)
{
}

/*!
  \internal
  Assignment operator
*/

QDBusError &QDBusError::operator=(const QDBusError &other)
{
    code = other.code;
    msg = other.msg;
    nm = other.nm;
    return *this;
}

/*!
    Returns this error's ErrorType.

    \sa ErrorType
*/

QDBusError::ErrorType QDBusError::type() const
{
    return code;
}

/*!
    Returns this error's name. Error names are similar to D-Bus Interface names, like
    \c org.freedesktop.DBus.InvalidArgs.

    \sa type()
*/

QString QDBusError::name() const
{
    return nm;
}

/*!
    Returns the message that the callee associated with this error. Error messages are
    implementation defined and usually contain a human-readable error code, though this does not
    mean it is suitable for your end-users.
*/

QString QDBusError::message() const
{
    return msg;
}

/*!
    Returns true if this is a valid error condition (i.e., if there was an error),
    otherwise false.
*/

bool QDBusError::isValid() const
{
    return (code != NoError);
}

/*!
    \since 4.3
    Returns the error name associated with error condition \a error.
*/
QString QDBusError::errorString(ErrorType error)
{
    return QLatin1String(::get(error));
}

#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QDBusError &msg)
{
    dbg.nospace() << "QDBusError(" << msg.name() << ", " << msg.message() << ')';
    return dbg.space();
}
#endif

QT_END_NAMESPACE

#endif // QT_NO_DBUS