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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// IWYU pragma: private, include "nsString.h"
/**
* 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 nsTSubstring_CharT base_string_type;
typedef uint32_t size_type;
public:
nsTSubstringTuple_CharT(const base_string_type* aStrA,
const base_string_type* aStrB)
: mHead(nullptr)
, mFragA(aStrA)
, mFragB(aStrB)
{
}
nsTSubstringTuple_CharT(const self_type& aHead,
const base_string_type* aStrB)
: mHead(&aHead)
, mFragA(nullptr) // this fragment is ignored when aHead != nullptr
, mFragB(aStrB)
{
}
/**
* computes the aggregate string length
*/
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.
*/
void WriteTo(char_type* aBuf, uint32_t aBufLen) const;
/**
* returns true if this tuple is dependent on (i.e., overlapping with)
* the given char sequence.
*/
bool IsDependentOn(const char_type* aStart, const char_type* aEnd) const;
private:
const self_type* mHead;
const base_string_type* mFragA;
const base_string_type* mFragB;
};
inline const nsTSubstringTuple_CharT
operator+(const nsTSubstringTuple_CharT::base_string_type& aStrA,
const nsTSubstringTuple_CharT::base_string_type& aStrB)
{
return nsTSubstringTuple_CharT(&aStrA, &aStrB);
}
inline const nsTSubstringTuple_CharT
operator+(const nsTSubstringTuple_CharT& aHead,
const nsTSubstringTuple_CharT::base_string_type& aStrB)
{
return nsTSubstringTuple_CharT(aHead, &aStrB);
}
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