gecko/xpcom/tests/StringFactoringTests/nsStdStringWrapper.h

235 lines
7.0 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Scott Collins <scc@mozilla.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsStdStringWrapper_h___
#define nsStdStringWrapper_h___
#include <string>
#ifndef nsAString_h___
#include "nsAString.h"
#endif
template <class T>
class nsStringAllocator
: public std::allocator<T> // temporarily
{
// ...
};
template < class CharT, class TraitsT = nsCharTraits<CharT>, class AllocatorT = nsStringAllocator<CharT> >
class basic_nsStdStringWrapper
: public basic_nsAString<CharT>
/*
...
*/
{
protected:
std::basic_string<CharT, TraitsT, AllocatorT> mRawString;
typedef std::basic_string<CharT, TraitsT, AllocatorT> basic_string_t;
using typename basic_string_t::traits_type;
using typename basic_string_t::value_type;
using typename basic_string_t::allocator_type;
using typename basic_string_t::size_type;
using typename basic_string_t::difference_type;
using typename basic_string_t::reference;
using typename basic_string_t::const_reference;
using typename basic_string_t::pointer;
using typename basic_string_t::const_pointer;
using typename basic_string_t::iterator;
using typename basic_string_t::const_iterator;
using typename basic_string_t::reverse_iterator;
using typename basic_string_t::const_reverse_iterator;
static const size_type npos = size_type(-1);
protected:
virtual const void* Implementation() const;
virtual const CharT* GetReadableFragment( nsReadableFragment<CharT>&, nsFragmentRequest, PRUint32 ) const;
virtual CharT* GetWritableFragment( nsWritableFragment<CharT>&, nsFragmentRequest, PRUint32 );
public:
basic_nsStdStringWrapper() { }
#if 0
explicit
basic_nsStdStringWrapper( const AllocatorT& a = AllocatorT() )
: mRawString(a)
{
}
#endif
explicit
basic_nsStdStringWrapper( const basic_nsAString<CharT>& str )
{
Assign(str);
}
#if 0
explicit
basic_nsStdStringWrapper( const basic_string_t& str, size_type pos = 0, size_type n = npos )
: mRawString(str, pos, n)
{
}
basic_nsStdStringWrapper( const basic_string_t& str, size_type pos, size_type n, const AllocatorT& a )
: mRawString(str, pos, n, a)
{
}
#endif
basic_nsStdStringWrapper( const CharT* s, size_type n, const AllocatorT& a = AllocatorT() )
: mRawString(s, n, a)
{
}
explicit
basic_nsStdStringWrapper( const CharT* s, const AllocatorT& a = AllocatorT() )
: mRawString(s, a)
{
}
#if 0
basic_nsStdStringWrapper( size_type n, CharT c, const AllocatorT& a = AllocatorT() )
: mRawString(n, c, a)
{
}
#endif
virtual
PRUint32
Length() const
{
return mRawString.length();
}
virtual
void
SetCapacity( PRUint32 aNewCapacity )
{
mRawString.reserve(aNewCapacity);
}
virtual
void
SetLength( PRUint32 aNewLength )
{
mRawString.resize(aNewLength);
}
protected:
virtual void do_AssignFromReadable( const basic_nsAString<CharT>& );
// ...
};
NS_DEF_TEMPLATE_STRING_COMPARISON_OPERATORS(basic_nsStdStringWrapper<CharT>, CharT)
template <class CharT, class TraitsT, class AllocatorT>
const void*
basic_nsStdStringWrapper<CharT, TraitsT, AllocatorT>::Implementation() const
{
static const char* implementation = "nsStdStringWrapper";
return implementation;
}
template <class CharT, class TraitsT, class AllocatorT>
const CharT*
basic_nsStdStringWrapper<CharT, TraitsT, AllocatorT>::GetReadableFragment( nsReadableFragment<CharT>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
{
switch ( aRequest )
{
case kFirstFragment:
case kLastFragment:
case kFragmentAt:
aFragment.mEnd = (aFragment.mStart = mRawString.data()) + mRawString.length();
return aFragment.mStart + aOffset;
case kPrevFragment:
case kNextFragment:
default:
return 0;
}
}
template <class CharT, class TraitsT, class AllocatorT>
CharT*
basic_nsStdStringWrapper<CharT, TraitsT, AllocatorT>::GetWritableFragment( nsWritableFragment<CharT>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset )
{
switch ( aRequest )
{
case kFirstFragment:
case kLastFragment:
case kFragmentAt:
aFragment.mEnd = (aFragment.mStart = const_cast<CharT*>(mRawString.data())) + mRawString.length();
return aFragment.mStart + aOffset;
case kPrevFragment:
case kNextFragment:
default:
return 0;
}
}
template <class CharT, class TraitsT, class AllocatorT>
void
basic_nsStdStringWrapper<CharT, TraitsT, AllocatorT>::do_AssignFromReadable( const basic_nsAString<CharT>& rhs )
{
typedef basic_nsStdStringWrapper<CharT, TraitsT, AllocatorT> this_t;
if ( SameImplementation(*this, rhs) )
mRawString = static_cast<this_t>(rhs).mRawString;
else
basic_nsAString<CharT>::do_AssignFromReadable(rhs);
}
typedef basic_nsStdStringWrapper<PRUnichar> nsStdString;
typedef basic_nsStdStringWrapper<char> nsStdCString;
#endif // !defined(nsStdStringWrapper_h___)