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/* -*- 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):
* 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 ***** */
/**
* nsTSubstringTuple_CharT
*
* Represents a tuple of string fragments. Built as a recursive binary tree.
* It is used to implement the concatenation of two or more string objects.
*
* NOTE: This class is a private implementation detail and should never be
* referenced outside the string code.
*/
class nsTSubstringTuple_CharT
{
public:
typedef CharT char_type;
typedef nsCharTraits<char_type> char_traits;
typedef nsTSubstringTuple_CharT self_type;
typedef nsTSubstring_CharT substring_type;
typedef nsTString_CharT string_type;
typedef nsTAString_CharT abstract_string_type;
typedef nsTObsoleteAString_CharT obsolete_string_type;
typedef PRUint32 size_type;
public:
nsTSubstringTuple_CharT(const abstract_string_type* a, const abstract_string_type* b)
: mHead(nsnull)
, mFragA(a)
, mFragB(b) {}
nsTSubstringTuple_CharT(const self_type& head, const abstract_string_type* b)
: mHead(&head)
, mFragA(nsnull) // this fragment is ignored when head != nsnull
, mFragB(b) {}
/**
* computes the aggregate string length
*/
NS_COM size_type Length() const;
/**
* writes the aggregate string to the given buffer. bufLen is assumed
* to be equal to or greater than the value returned by the Length()
* method. the string written to |buf| is not null-terminated.
*/
NS_COM void WriteTo(char_type *buf, PRUint32 bufLen) const;
/**
* returns true if this tuple is dependent on (i.e., overlapping with)
* the given char sequence.
*/
NS_COM PRBool IsDependentOn(const char_type *start, const char_type *end) const;
private:
const self_type* mHead;
const abstract_string_type* mFragA;
const abstract_string_type* mFragB;
};
inline
const nsTSubstringTuple_CharT
operator+(const nsTAString_CharT& a, const nsTAString_CharT& b)
{
return nsTSubstringTuple_CharT(&a, &b);
}
inline
const nsTSubstringTuple_CharT
operator+(const nsTSubstringTuple_CharT& head, const nsTAString_CharT& b)
{
return nsTSubstringTuple_CharT(head, &b);
}
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