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116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
//* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla.
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*
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* The Initial Developer of the Original Code is IBM Corporation.
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* Portions created by IBM Corporation are Copyright (C) 2003
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* IBM Corporation. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@meer.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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* nsTSubstringTuple_CharT
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*
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* Represents a tuple of string fragments. Built as a recursive binary tree.
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* It is used to implement the concatenation of two or more string objects.
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*
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* NOTE: This class is a private implementation detail and should never be
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* referenced outside the string code.
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*/
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class nsTSubstringTuple_CharT
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{
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public:
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typedef CharT char_type;
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typedef nsCharTraits<char_type> char_traits;
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typedef nsTSubstringTuple_CharT self_type;
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typedef nsTSubstring_CharT substring_type;
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#ifdef MOZ_V1_STRING_ABI
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typedef nsTAString_CharT base_string_type;
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typedef nsTObsoleteAString_CharT obsolete_string_type;
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#else
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typedef nsTSubstring_CharT base_string_type;
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#endif
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typedef PRUint32 size_type;
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public:
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nsTSubstringTuple_CharT(const base_string_type* a, const base_string_type* b)
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: mHead(nsnull)
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, mFragA(a)
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, mFragB(b) {}
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nsTSubstringTuple_CharT(const self_type& head, const base_string_type* b)
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: mHead(&head)
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, mFragA(nsnull) // this fragment is ignored when head != nsnull
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, mFragB(b) {}
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/**
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* computes the aggregate string length
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*/
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NS_COM size_type Length() const;
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/**
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* writes the aggregate string to the given buffer. bufLen is assumed
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* to be equal to or greater than the value returned by the Length()
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* method. the string written to |buf| is not null-terminated.
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*/
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NS_COM void WriteTo(char_type *buf, PRUint32 bufLen) const;
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/**
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* returns true if this tuple is dependent on (i.e., overlapping with)
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* the given char sequence.
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*/
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NS_COM PRBool IsDependentOn(const char_type *start, const char_type *end) const;
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private:
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const self_type* mHead;
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const base_string_type* mFragA;
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const base_string_type* mFragB;
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};
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inline
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const nsTSubstringTuple_CharT
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operator+(const nsTSubstringTuple_CharT::base_string_type& a, const nsTSubstringTuple_CharT::base_string_type& b)
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{
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return nsTSubstringTuple_CharT(&a, &b);
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}
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inline
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const nsTSubstringTuple_CharT
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operator+(const nsTSubstringTuple_CharT& head, const nsTSubstringTuple_CharT::base_string_type& b)
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{
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return nsTSubstringTuple_CharT(head, &b);
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}
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