Add QT_NO_FILESYSTEMITERATOR.

This makes it possible to use the file-related classes
on platforms that does not have a native QFileSystemIterator
implementation.

One use case is that we want to use the Qt
resource system even if the platform file system
support is limited.

Reviewed-by: joao

5 files changed, 30 insertions, 0 deletions

diff --git a/src/corelib/global/qfeatures.h b/src/corelib/global/qfeatures.h
index d1a73a6..604d08a 100644
--- a/src/corelib/global/qfeatures.h
+++ b/src/corelib/global/qfeatures.h
@@ -79,6 +79,9 @@
 // Effects
 //#define QT_NO_EFFECTS
 
+// QFileSystemIterator
+//#define QT_NO_FILESYSTEMITERATOR
+
 // QFileSystemWatcher
 //#define QT_NO_FILESYSTEMWATCHER
 
diff --git a/src/corelib/global/qfeatures.txt b/src/corelib/global/qfeatures.txt
index 4d938a9..6b861d4 100644
--- a/src/corelib/global/qfeatures.txt
+++ b/src/corelib/global/qfeatures.txt
@@ -242,6 +242,14 @@ Requires:
 Name: QFileSystemWatcher
 SeeAlso: ???
 
+Feature: FILESYSTEMITERATOR
+Description: Provides fast file-system iteration.
+for modications.
+Section: File I/O
+Requires:
+Name: QFileSystemIterator
+SeeAlso: ???
+
 # Widgets
 
 Feature: TREEWIDGET
diff --git a/src/corelib/io/qdiriterator.cpp b/src/corelib/io/qdiriterator.cpp
index d293791..c7e56bd 100644
--- a/src/corelib/io/qdiriterator.cpp
+++ b/src/corelib/io/qdiriterator.cpp
@@ -142,7 +142,9 @@ public:
 #endif
 
     QDirIteratorPrivateIteratorStack<QAbstractFileEngineIterator> fileEngineIterators;
+#ifndef QT_NO_FILESYSTEMITERATOR
     QDirIteratorPrivateIteratorStack<QFileSystemIterator> nativeIterators;
+#endif
 
     QFileInfo currentFileInfo;
     QFileInfo nextFileInfo;
@@ -204,9 +206,11 @@ void QDirIteratorPrivate::pushDirectory(const QFileInfo &fileInfo)
             // No iterator; no entry list.
         }
     } else {
+#ifndef QT_NO_FILESYSTEMITERATOR
         QFileSystemIterator *it = new QFileSystemIterator(fileInfo.d_ptr->fileEntry,
             filters, nameFilters, iteratorFlags);
         nativeIterators << it;
+#endif
     }
 }
 
@@ -244,6 +248,7 @@ void QDirIteratorPrivate::advance()
             delete it;
         }
     } else {
+#ifndef QT_NO_FILESYSTEMITERATOR
         QFileSystemEntry nextEntry;
         QFileSystemMetaData nextMetaData;
 
@@ -260,6 +265,7 @@ void QDirIteratorPrivate::advance()
             nativeIterators.pop();
             delete it;
         }
+#endif
     }
 
     currentFileInfo = nextFileInfo;
@@ -500,7 +506,11 @@ bool QDirIterator::hasNext() const
     if (d->engine)
         return !d->fileEngineIterators.isEmpty();
     else
+#ifndef QT_NO_FILESYSTEMITERATOR
         return !d->nativeIterators.isEmpty();
+#else
+        return false;
+#endif
 }
 
 /*!
diff --git a/src/corelib/io/qfilesystemiterator_p.h b/src/corelib/io/qfilesystemiterator_p.h
index 66f4b1e..3477242 100644
--- a/src/corelib/io/qfilesystemiterator_p.h
+++ b/src/corelib/io/qfilesystemiterator_p.h
@@ -54,6 +54,9 @@
 //
 
 #include <QtCore/qglobal.h>
+
+#ifndef QT_NO_FILESYSTEMITERATOR
+
 #include <QtCore/qdir.h>
 #include <QtCore/qdiriterator.h>
 #include <QtCore/qstringlist.h>
@@ -112,4 +115,6 @@ private:
 
 QT_END_NAMESPACE
 
+#endif // QT_NO_FILESYSTEMITERATOR
+
 #endif // include guard
diff --git a/src/corelib/io/qfilesystemiterator_unix.cpp b/src/corelib/io/qfilesystemiterator_unix.cpp
index 00ccd41..7c5fc29 100644
--- a/src/corelib/io/qfilesystemiterator_unix.cpp
+++ b/src/corelib/io/qfilesystemiterator_unix.cpp
@@ -42,6 +42,8 @@
 #include "qplatformdefs.h"
 #include "qfilesystemiterator_p.h"
 
+#ifndef QT_NO_FILESYSTEMITERATOR
+
 #include <stdlib.h>
 #include <errno.h>
 
@@ -111,3 +113,5 @@ bool QFileSystemIterator::advance(QFileSystemEntry &fileEntry, QFileSystemMetaDa
 }
 
 QT_END_NAMESPACE
+
+#endif // QT_NO_FILESYSTEMITERATOR