Move canonicalPath() to the new qfilesystemengine_unix

Reviewed-by: João Abecasis

6 files changed, 144 insertions, 71 deletions

diff --git a/src/corelib/io/io.pri b/src/corelib/io/io.pri
index 3bde2de..7a34275 100644
--- a/src/corelib/io/io.pri
+++ b/src/corelib/io/io.pri
@@ -56,7 +56,8 @@ SOURCES += \
         io/qfsfileengine.cpp \
         io/qfsfileengine_iterator.cpp \
         io/qfilesystemwatcher.cpp \
-        io/qfilesystementry.cpp
+        io/qfilesystementry.cpp \
+        io/qfilesystemengine.cpp
 
 win32 {
         SOURCES += io/qsettings_win.cpp
diff --git a/src/corelib/io/qfilesystemengine.cpp b/src/corelib/io/qfilesystemengine.cpp
new file mode 100644
index 0000000..04e53ce
--- /dev/null
+++ b/src/corelib/io/qfilesystemengine.cpp
@@ -0,0 +1,113 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfilesystemengine_p.h"
+#include <QtCore/qdir.h>
+#include <QtCore/qset.h>
+
+/*!
+    \internal
+
+    Returns the canonicalized form of \a path (i.e., with all symlinks
+    resolved, and all redundant path elements removed.
+*/
+QString QFileSystemEngine::slowCanonicalized(const QString &path)
+{
+    if (path.isEmpty())
+        return path;
+
+    QFileInfo fi;
+    const QChar slash(QLatin1Char('/'));
+    QString tmpPath = path;
+    int separatorPos = 0;
+    QSet<QString> nonSymlinks;
+    QSet<QString> known;
+
+    known.insert(path);
+    do {
+#ifdef Q_OS_WIN
+        if (separatorPos == 0) {
+            if (tmpPath.size() >= 2 && tmpPath.at(0) == slash && tmpPath.at(1) == slash) {
+                // UNC, skip past the first two elements
+                separatorPos = tmpPath.indexOf(slash, 2);
+            } else if (tmpPath.size() >= 3 && tmpPath.at(1) == QLatin1Char(':') && tmpPath.at(2) == slash) {
+                // volume root, skip since it can not be a symlink
+                separatorPos = 2;
+            }
+        }
+        if (separatorPos != -1)
+#endif
+        separatorPos = tmpPath.indexOf(slash, separatorPos + 1);
+        QString prefix = separatorPos == -1 ? tmpPath : tmpPath.left(separatorPos);
+        if (
+#ifdef Q_OS_SYMBIAN
+            // Symbian doesn't support directory symlinks, so do not check for link unless we
+            // are handling the last path element. This not only slightly improves performance,
+            // but also saves us from lot of unnecessary platform security check failures
+            // when dealing with files under *:/private directories.
+            separatorPos == -1 &&
+#endif
+            !nonSymlinks.contains(prefix)) {
+            fi.setFile(prefix);
+            if (fi.isSymLink()) {
+                QString target = fi.symLinkTarget();
+                if(QFileInfo(target).isRelative())
+                    target = fi.absolutePath() + slash + target;
+                if (separatorPos != -1) {
+                    if (fi.isDir() && !target.endsWith(slash))
+                        target.append(slash);
+                    target.append(tmpPath.mid(separatorPos));
+                }
+                tmpPath = QDir::cleanPath(target);
+                separatorPos = 0;
+
+                if (known.contains(tmpPath))
+                    return QString();
+                known.insert(tmpPath);
+            } else {
+                nonSymlinks.insert(prefix);
+            }
+        }
+    } while (separatorPos != -1);
+
+    return QDir::cleanPath(tmpPath);
+}
+
diff --git a/src/corelib/io/qfilesystemengine_p.h b/src/corelib/io/qfilesystemengine_p.h
index c1bb3b4..61ca085 100644
--- a/src/corelib/io/qfilesystemengine_p.h
+++ b/src/corelib/io/qfilesystemengine_p.h
@@ -84,6 +84,8 @@ public:
 
     static bool setPermissions(const QFileSystemEntry &entry, QFile::Permissions permissions,
             QFileSystemMetaData *data = 0);
+
+    static QString slowCanonicalized(const QString &path);
 };
 
 QT_END_NAMESPACE
diff --git a/src/corelib/io/qfilesystemengine_unix.cpp b/src/corelib/io/qfilesystemengine_unix.cpp
index 68cc154..283c787 100644
--- a/src/corelib/io/qfilesystemengine_unix.cpp
+++ b/src/corelib/io/qfilesystemengine_unix.cpp
@@ -42,6 +42,9 @@
 #include "qfilesystemengine_p.h"
 #include "qfsfileengine.h"
 
+#include <stdlib.h> // for realpath()
+#include <errno.h>
+
 QT_BEGIN_NAMESPACE
 
 bool QFileSystemEngine::isCaseSensitive()
@@ -62,7 +65,23 @@ QFileSystemEntry QFileSystemEngine::getLinkTarget(const QFileSystemEntry &link)
 //static
 QFileSystemEntry QFileSystemEngine::canonicalName(const QFileSystemEntry &entry)
 {
-    return entry; // TODO implement;
+    if (entry.isEmpty() || entry.isRoot())
+        return entry;
+
+#ifdef __UCLIBC__
+    return QFileSystemEntry::slowCanonicalName(entry);
+#else
+
+    char *ret = realpath(entry.nativeFilePath().constData(), (char*)0);
+    if (ret) {
+        QString canonicalPath = QDir::cleanPath(QString::fromLocal8Bit(ret));
+        free(ret);
+        return QFileSystemEntry(canonicalPath);
+    } else if (errno == ENOENT) { // file doesn't exist
+        return QFileSystemEntry();
+    }
+    return entry;
+#endif
 }
 
 //static
diff --git a/src/corelib/io/qfsfileengine.cpp b/src/corelib/io/qfsfileengine.cpp
index 75f82a6..665d23e 100644
--- a/src/corelib/io/qfsfileengine.cpp
+++ b/src/corelib/io/qfsfileengine.cpp
@@ -41,6 +41,7 @@
 
 #include "qfsfileengine_p.h"
 #include "qfsfileengine_iterator_p.h"
+#include "qfilesystemengine_p.h"
 #include "qdatetime.h"
 #include "qdiriterator.h"
 #include "qset.h"
@@ -179,61 +180,7 @@ QString QFSFileEnginePrivate::canonicalized(const QString &path)
 #endif
 #endif
 
-    QFileInfo fi;
-    const QChar slash(QLatin1Char('/'));
-    QString tmpPath = path;
-    int separatorPos = 0;
-    QSet<QString> nonSymlinks;
-    QSet<QString> known;
-
-    known.insert(path);
-    do {
-#ifdef Q_OS_WIN
-        if (separatorPos == 0) {
-            if (tmpPath.size() >= 2 && tmpPath.at(0) == slash && tmpPath.at(1) == slash) {
-                // UNC, skip past the first two elements
-                separatorPos = tmpPath.indexOf(slash, 2);
-            } else if (tmpPath.size() >= 3 && tmpPath.at(1) == QLatin1Char(':') && tmpPath.at(2) == slash) {
-                // volume root, skip since it can not be a symlink
-                separatorPos = 2;
-            }
-        }
-        if (separatorPos != -1)
-#endif
-        separatorPos = tmpPath.indexOf(slash, separatorPos + 1);
-        QString prefix = separatorPos == -1 ? tmpPath : tmpPath.left(separatorPos);
-        if (
-#ifdef Q_OS_SYMBIAN
-            // Symbian doesn't support directory symlinks, so do not check for link unless we
-            // are handling the last path element. This not only slightly improves performance,
-            // but also saves us from lot of unnecessary platform security check failures
-            // when dealing with files under *:/private directories.
-            separatorPos == -1 &&
-#endif
-            !nonSymlinks.contains(prefix)) {
-            fi.setFile(prefix);
-            if (fi.isSymLink()) {
-                QString target = fi.symLinkTarget();
-                if(QFileInfo(target).isRelative())
-                    target = fi.absolutePath() + slash + target;
-                if (separatorPos != -1) {
-                    if (fi.isDir() && !target.endsWith(slash))
-                        target.append(slash);
-                    target.append(tmpPath.mid(separatorPos));
-                }
-                tmpPath = QDir::cleanPath(target);
-                separatorPos = 0;
-
-                if (known.contains(tmpPath))
-                    return QString();
-                known.insert(tmpPath);
-            } else {
-                nonSymlinks.insert(prefix);
-            }
-        }
-    } while (separatorPos != -1);
-
-    return QDir::cleanPath(tmpPath);
+    return QFileSystemEngine::slowCanonicalized(path);
 }
 
 /*!
diff --git a/src/corelib/io/qfsfileengine_unix.cpp b/src/corelib/io/qfsfileengine_unix.cpp
index 3daf7f6..29491f5 100644
--- a/src/corelib/io/qfsfileengine_unix.cpp
+++ b/src/corelib/io/qfsfileengine_unix.cpp
@@ -1027,25 +1027,16 @@ QString QFSFileEngine::fileName(FileName file) const
     } else if (file == PathName) {
         return d->fileEntry.path();
     } else if (file == AbsoluteName || file == AbsolutePathName) {
-        QFileSystemEntry entry = QFileSystemEngine::absoluteName(d->fileEntry);
+        QFileSystemEntry entry(QFileSystemEngine::absoluteName(d->fileEntry));
         if (file == AbsolutePathName) {
             return entry.path();
         }
         return entry.filePath();
     } else if (file == CanonicalName || file == CanonicalPathName) {
-        if (!(fileFlags(ExistsFlag) & ExistsFlag))
-            return QString();
-
-        QString ret = QFSFileEnginePrivate::canonicalized(fileName(AbsoluteName));
-        if (file == CanonicalPathName && !ret.isEmpty()) {
-            int slash = ret.lastIndexOf(QLatin1Char('/'));
-            if (slash == -1)
-                ret = QDir::currentPath();
-            else if (slash == 0)
-                ret = QLatin1String("/");
-            ret = ret.left(slash);
-        }
-        return ret;
+        QFileSystemEntry entry(QFileSystemEngine::canonicalName(d->fileEntry));
+        if (file == CanonicalPathName)
+            return entry.path();
+        return entry.filePath();
     } else if (file == LinkName) {
         if (d->isSymlink()) {
 #if defined(__GLIBC__) && !defined(PATH_MAX)