mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
316 lines
6.5 KiB
C++
316 lines
6.5 KiB
C++
/* -*- 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/. */
|
|
|
|
#ifndef nsStringIterator_h___
|
|
#define nsStringIterator_h___
|
|
|
|
#include "nsCharTraits.h"
|
|
#include "nsAlgorithm.h"
|
|
#include "nsDebug.h"
|
|
|
|
/**
|
|
* @see nsTAString
|
|
*/
|
|
|
|
template <class CharT>
|
|
class nsReadingIterator
|
|
{
|
|
public:
|
|
typedef nsReadingIterator<CharT> self_type;
|
|
typedef ptrdiff_t difference_type;
|
|
typedef CharT value_type;
|
|
typedef const CharT* pointer;
|
|
typedef const CharT& reference;
|
|
|
|
private:
|
|
friend class nsAString;
|
|
friend class nsACString;
|
|
|
|
// unfortunately, the API for nsReadingIterator requires that the
|
|
// iterator know its start and end positions. this was needed when
|
|
// we supported multi-fragment strings, but now it is really just
|
|
// extra baggage. we should remove mStart and mEnd at some point.
|
|
|
|
const CharT* mStart;
|
|
const CharT* mEnd;
|
|
const CharT* mPosition;
|
|
|
|
public:
|
|
nsReadingIterator()
|
|
{
|
|
}
|
|
// nsReadingIterator( const nsReadingIterator<CharT>& ); // auto-generated copy-constructor OK
|
|
// nsReadingIterator<CharT>& operator=( const nsReadingIterator<CharT>& ); // auto-generated copy-assignment operator OK
|
|
|
|
inline void normalize_forward()
|
|
{
|
|
}
|
|
inline void normalize_backward()
|
|
{
|
|
}
|
|
|
|
pointer start() const
|
|
{
|
|
return mStart;
|
|
}
|
|
|
|
pointer end() const
|
|
{
|
|
return mEnd;
|
|
}
|
|
|
|
pointer get() const
|
|
{
|
|
return mPosition;
|
|
}
|
|
|
|
CharT operator*() const
|
|
{
|
|
return *get();
|
|
}
|
|
|
|
#if 0
|
|
// An iterator really deserves this, but some compilers (notably IBM VisualAge for OS/2)
|
|
// don't like this when |CharT| is a type without members.
|
|
pointer operator->() const
|
|
{
|
|
return get();
|
|
}
|
|
#endif
|
|
|
|
self_type& operator++()
|
|
{
|
|
++mPosition;
|
|
return *this;
|
|
}
|
|
|
|
self_type operator++(int)
|
|
{
|
|
self_type result(*this);
|
|
++mPosition;
|
|
return result;
|
|
}
|
|
|
|
self_type& operator--()
|
|
{
|
|
--mPosition;
|
|
return *this;
|
|
}
|
|
|
|
self_type operator--(int)
|
|
{
|
|
self_type result(*this);
|
|
--mPosition;
|
|
return result;
|
|
}
|
|
|
|
difference_type size_forward() const
|
|
{
|
|
return mEnd - mPosition;
|
|
}
|
|
|
|
difference_type size_backward() const
|
|
{
|
|
return mPosition - mStart;
|
|
}
|
|
|
|
self_type& advance(difference_type aN)
|
|
{
|
|
if (aN > 0) {
|
|
difference_type step = XPCOM_MIN(aN, size_forward());
|
|
|
|
NS_ASSERTION(step > 0,
|
|
"can't advance a reading iterator beyond the end of a string");
|
|
|
|
mPosition += step;
|
|
} else if (aN < 0) {
|
|
difference_type step = XPCOM_MAX(aN, -size_backward());
|
|
|
|
NS_ASSERTION(step < 0,
|
|
"can't advance (backward) a reading iterator beyond the end of a string");
|
|
|
|
mPosition += step;
|
|
}
|
|
return *this;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @see nsTAString
|
|
*/
|
|
|
|
template <class CharT>
|
|
class nsWritingIterator
|
|
{
|
|
public:
|
|
typedef nsWritingIterator<CharT> self_type;
|
|
typedef ptrdiff_t difference_type;
|
|
typedef CharT value_type;
|
|
typedef CharT* pointer;
|
|
typedef CharT& reference;
|
|
|
|
private:
|
|
friend class nsAString;
|
|
friend class nsACString;
|
|
|
|
// unfortunately, the API for nsWritingIterator requires that the
|
|
// iterator know its start and end positions. this was needed when
|
|
// we supported multi-fragment strings, but now it is really just
|
|
// extra baggage. we should remove mStart and mEnd at some point.
|
|
|
|
CharT* mStart;
|
|
CharT* mEnd;
|
|
CharT* mPosition;
|
|
|
|
public:
|
|
nsWritingIterator()
|
|
{
|
|
}
|
|
// nsWritingIterator( const nsWritingIterator<CharT>& ); // auto-generated copy-constructor OK
|
|
// nsWritingIterator<CharT>& operator=( const nsWritingIterator<CharT>& ); // auto-generated copy-assignment operator OK
|
|
|
|
inline void normalize_forward()
|
|
{
|
|
}
|
|
inline void normalize_backward()
|
|
{
|
|
}
|
|
|
|
pointer start() const
|
|
{
|
|
return mStart;
|
|
}
|
|
|
|
pointer end() const
|
|
{
|
|
return mEnd;
|
|
}
|
|
|
|
pointer get() const
|
|
{
|
|
return mPosition;
|
|
}
|
|
|
|
reference operator*() const
|
|
{
|
|
return *get();
|
|
}
|
|
|
|
#if 0
|
|
// An iterator really deserves this, but some compilers (notably IBM VisualAge for OS/2)
|
|
// don't like this when |CharT| is a type without members.
|
|
pointer
|
|
operator->() const
|
|
{
|
|
return get();
|
|
}
|
|
#endif
|
|
|
|
self_type& operator++()
|
|
{
|
|
++mPosition;
|
|
return *this;
|
|
}
|
|
|
|
self_type operator++(int)
|
|
{
|
|
self_type result(*this);
|
|
++mPosition;
|
|
return result;
|
|
}
|
|
|
|
self_type& operator--()
|
|
{
|
|
--mPosition;
|
|
return *this;
|
|
}
|
|
|
|
self_type operator--(int)
|
|
{
|
|
self_type result(*this);
|
|
--mPosition;
|
|
return result;
|
|
}
|
|
|
|
difference_type size_forward() const
|
|
{
|
|
return mEnd - mPosition;
|
|
}
|
|
|
|
difference_type size_backward() const
|
|
{
|
|
return mPosition - mStart;
|
|
}
|
|
|
|
self_type& advance(difference_type aN)
|
|
{
|
|
if (aN > 0) {
|
|
difference_type step = XPCOM_MIN(aN, size_forward());
|
|
|
|
NS_ASSERTION(step > 0,
|
|
"can't advance a writing iterator beyond the end of a string");
|
|
|
|
mPosition += step;
|
|
} else if (aN < 0) {
|
|
difference_type step = XPCOM_MAX(aN, -size_backward());
|
|
|
|
NS_ASSERTION(step < 0,
|
|
"can't advance (backward) a writing iterator beyond the end of a string");
|
|
|
|
mPosition += step;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
void write(const value_type* aS, uint32_t aN)
|
|
{
|
|
NS_ASSERTION(size_forward() > 0,
|
|
"You can't |write| into an |nsWritingIterator| with no space!");
|
|
|
|
nsCharTraits<value_type>::move(mPosition, aS, aN);
|
|
advance(difference_type(aN));
|
|
}
|
|
};
|
|
|
|
template <class CharT>
|
|
inline bool
|
|
operator==(const nsReadingIterator<CharT>& aLhs,
|
|
const nsReadingIterator<CharT>& aRhs)
|
|
{
|
|
return aLhs.get() == aRhs.get();
|
|
}
|
|
|
|
template <class CharT>
|
|
inline bool
|
|
operator!=(const nsReadingIterator<CharT>& aLhs,
|
|
const nsReadingIterator<CharT>& aRhs)
|
|
{
|
|
return aLhs.get() != aRhs.get();
|
|
}
|
|
|
|
|
|
//
|
|
// |nsWritingIterator|s
|
|
//
|
|
|
|
template <class CharT>
|
|
inline bool
|
|
operator==(const nsWritingIterator<CharT>& aLhs,
|
|
const nsWritingIterator<CharT>& aRhs)
|
|
{
|
|
return aLhs.get() == aRhs.get();
|
|
}
|
|
|
|
template <class CharT>
|
|
inline bool
|
|
operator!=(const nsWritingIterator<CharT>& aLhs,
|
|
const nsWritingIterator<CharT>& aRhs)
|
|
{
|
|
return aLhs.get() != aRhs.get();
|
|
}
|
|
|
|
#endif /* !defined(nsStringIterator_h___) */
|