gecko/xpcom/string/public/nsTDependentSubstring.h

121 lines
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* ***** 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.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by IBM Corporation are Copyright (C) 2003
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Scott Collins <scc@mozilla.org> (original author)
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
/**
* nsTDependentSubstring_CharT
*
* A string class which wraps an external array of string characters. It
* is the client code's responsibility to ensure that the external buffer
* remains valid for a long as the string is alive.
*
* NAMES:
* nsDependentSubstring for wide characters
* nsDependentCSubstring for narrow characters
*/
class nsTDependentSubstring_CharT : public nsTSubstring_CharT
{
public:
typedef nsTDependentSubstring_CharT self_type;
public:
NS_COM void Rebind( const substring_type&, PRUint32 startPos, PRUint32 length = size_type(-1) );
NS_COM void Rebind( const char_type* start, const char_type* end );
nsTDependentSubstring_CharT( const substring_type& str, PRUint32 startPos, PRUint32 length = size_type(-1) )
: substring_type()
{
Rebind(str, startPos, length);
}
nsTDependentSubstring_CharT( const char_type* start, const char_type* end )
: substring_type(const_cast<char_type*>(start), PRUint32(end - start), F_NONE) {}
nsTDependentSubstring_CharT( const const_iterator& start, const const_iterator& end )
: substring_type(const_cast<char_type*>(start.get()), PRUint32(end.get() - start.get()), F_NONE) {}
// Create a nsTDependentSubstring to be bound later
nsTDependentSubstring_CharT()
: substring_type() {}
// auto-generated copy-constructor OK (XXX really?? what about base class copy-ctor?)
private:
// NOT USED
void operator=( const self_type& ); // we're immutable, you can't assign into a substring
};
inline
const nsTDependentSubstring_CharT
Substring( const nsTSubstring_CharT& str, PRUint32 startPos, PRUint32 length = PRUint32(-1) )
{
return nsTDependentSubstring_CharT(str, startPos, length);
}
inline
const nsTDependentSubstring_CharT
Substring( const nsReadingIterator<CharT>& start, const nsReadingIterator<CharT>& end )
{
return nsTDependentSubstring_CharT(start.get(), end.get());
}
inline
const nsTDependentSubstring_CharT
Substring( const CharT* start, const CharT* end )
{
return nsTDependentSubstring_CharT(start, end);
}
inline
const nsTDependentSubstring_CharT
StringHead( const nsTSubstring_CharT& str, PRUint32 count )
{
return nsTDependentSubstring_CharT(str, 0, count);
}
inline
const nsTDependentSubstring_CharT
StringTail( const nsTSubstring_CharT& str, PRUint32 count )
{
return nsTDependentSubstring_CharT(str, str.Length() - count, count);
}