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+/*******************************************************************************
+**
+** Filename   : util
+** Created on : 03 April, 2005
+** Copyright  : (c) 2005 Till Adam
+** Email      : <[email protected]>
+**
+*******************************************************************************/
+
+/*******************************************************************************
+**
+**   This program is free software; you can redistribute it and/or modify
+**   it under the terms of the GNU General Public License as published by
+**   the Free Software Foundation; either version 2 of the License, or
+**   (at your option) any later version.
+**
+**   It is distributed in the hope that it will be useful, but
+**   WITHOUT ANY WARRANTY; without even the implied warranty of
+**   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+**   General Public License for more details.
+**
+**   You should have received a copy of the GNU General Public License
+**   along with this program; if not, write to the Free Software
+**   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+**
+**   In addition, as a special exception, the copyright holders give
+**   permission to link the code of this program with any edition of
+**   the Qt library by Trolltech AS, Norway (or with modified versions
+**   of Qt that use the same license as Qt), and distribute linked
+**   combinations including the two.  You must obey the GNU General
+**   Public License in all respects for all of the code used other than
+**   Qt.  If you modify this file, you may extend this exception to
+**   your version of the file, but you are not obligated to do so.  If
+**   you do not wish to do so, delete this exception statement from
+**   your version.
+**
+*******************************************************************************/
+#ifndef KMAILUTIL_H
+#define KMAILUTIL_H
+
+#include <stdlib.h>
+
+#include <qobject.h>
+#include <qcstring.h>
+
+#include <kio/netaccess.h>
+#include <kmessagebox.h>
+#include <klocale.h>
+
+class DwString;
+class KURL;
+class QWidget;
+
+namespace KMail
+{
+    /**
+     * The Util namespace contains a collection of helper functions use in
+     * various places.
+     */
+namespace Util {
+    /**
+     * Convert all sequences of "\r\n" (carriage return followed by a line
+     * feed) to a single "\n" (line feed). The conversion happens in place.
+     * Returns the length of the resulting string.
+     * @param str The string to convert.
+     * @param strLen The length of the string to convert.
+     * @return The new length of the converted string.
+     */
+    size_t crlf2lf( char* str, const size_t strLen );
+
+
+    /**
+     * Convert "\n" line endings to "\r\n".
+     * @param src The source string to convert.
+     * @return The result string.
+     */
+    QCString lf2crlf( const QCString & src );
+    /**
+     * Convert "\n" line endings to "\r\n".
+     * @param src The source string to convert. NOT null-terminated.
+     * @return The result string. NOT null-terminated.
+     */
+    QByteArray lf2crlf( const QByteArray & src );
+
+    /**
+     * Construct a QCString from a DwString
+     */
+    QCString CString( const DwString& str );
+
+    /**
+     * Construct a QByteArray from a DwString
+     */
+    QByteArray ByteArray( const DwString& str );
+
+    /**
+     * Construct a DwString from a QCString
+     */
+    DwString dwString( const QCString& str );
+
+    /**
+     * Construct a DwString from a QByteArray
+     */
+    DwString dwString( const QByteArray& str );
+
+    /**
+     * Fills a QByteArray from a QCString - removing the trailing null.
+     */
+    void setFromQCString( QByteArray& arr, const QCString& cstr );
+
+    inline void setFromQCString( QByteArray& arr, const QCString& cstr )
+    {
+      if ( cstr.size() )
+        arr.duplicate( cstr.data(), cstr.size()-1 );
+      else
+        arr.resize(0);
+    }
+
+    /**
+     * Creates a QByteArray from a QCString without detaching (duplicating the data).
+     * Fast, but be careful, the QCString gets modified by this; this is only good for
+     * the case where the QCString is going to be thrown away afterwards anyway.
+     */
+    QByteArray byteArrayFromQCStringNoDetach( QCString& cstr );
+    inline QByteArray byteArrayFromQCStringNoDetach( QCString& cstr )
+    {
+      QByteArray arr = cstr;
+      if ( arr.size() )
+        arr.resize( arr.size() - 1 );
+      return arr;
+    }
+
+    /**
+     * Restore the QCString after byteArrayFromQCStringNoDetach modified it
+     */
+    void restoreQCString( QCString& str );
+    inline void restoreQCString( QCString& str )
+    {
+      if ( str.data() )
+        str.resize( str.size() + 1 );
+    }
+
+    /**
+     * Fills a QCString from a QByteArray - adding the trailing null.
+     */
+    void setFromByteArray( QCString& cstr, const QByteArray& arr );
+
+    inline void setFromByteArray( QCString& result, const QByteArray& arr )
+    {
+      const int len = arr.size();
+      result.resize( len + 1 /* trailing NUL */ );
+      memcpy(result.data(), arr.data(), len);
+      result[len] = 0;
+    }
+
+    /**
+     * Append a bytearray to a bytearray. No trailing nuls anywhere.
+     */
+    void append( QByteArray& that, const QByteArray& str );
+
+    /**
+     * Append a char* to a bytearray. Trailing nul not copied.
+     */
+    void append( QByteArray& that, const char* str );
+
+    /**
+     * Append a QCString to a bytearray. Trailing nul not copied.
+     */
+    void append( QByteArray& that, const QCString& str );
+
+    void insert( QByteArray& that, uint index, const char* s );
+
+   /**
+     * A LaterDeleter is intended to be used with the RAII ( Resource
+     * Acquisition is Initialization ) paradigm. When an instance of it
+     * goes out of scope it deletes the associated object  It can be
+     * disabled, in case the deletion needs to be avoided for some
+     * reason, since going out-of-scope cannot be avoided.
+     */
+    class LaterDeleter
+    {
+      public:
+      LaterDeleter( QObject *o)
+        :m_object( o ), m_disabled( false )
+      {
+      }
+      virtual ~LaterDeleter()
+      {
+        if ( !m_disabled ) {
+          m_object->deleteLater();
+        }
+      }
+      void setDisabled( bool v )
+      {
+        m_disabled = v;
+      }
+      protected:
+      QObject *m_object;
+      bool m_disabled;
+    };
+
+    // return true if we should proceed, false if we should abort
+    inline bool checkOverwrite( const KURL& url, QWidget* w )
+    {
+        if ( KIO::NetAccess::exists( url, false /*dest*/, w ) ) {
+            if ( KMessageBox::Cancel ==
+                    KMessageBox::warningContinueCancel(
+                        w,
+                        i18n( "A file named \"%1\" already exists. "
+                            "Are you sure you want to overwrite it?" ).arg( url.prettyURL() ),
+                        i18n( "Overwrite File?" ),
+                        i18n( "&Overwrite" ) ) )
+                return false;
+        }
+        return true;
+    }
+
+
+
+}
+}
+
+#endif