office-gobmx/ucb/source/inc/regexpmap.hxx
Stephan Bergmann 29bc12777c Let loplugin:nullptr look into template instantiations
It missed some occurrences of 0 when only looking into uninstantiated template
code, as Clang doesn't model them with an ImplicitCastExpr, even if the target
is known to be a (dependent) pointer type.

Looking into all template instantiations of course carries the risk that a given
use of 0 is meant to be interpreted as a pointer in some and as an integer in
other instantiations.  But the only case where that happened in the current code
base is RegistryValueList::getElement (include/registry/registry.hxx), where {}
is arguably a better choice anyway.  (And which would presumably also hold for
any future such cases.)

Change-Id: I708bcfc8bedc0a49c9282d7814eb325afa29905c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128462
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
2022-01-15 15:58:07 +01:00

434 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <sal/config.h>
#include <vector>
#include <memory>
#include <rtl/ustring.hxx>
#include <sal/types.h>
#include "regexp.hxx"
namespace ucb_impl {
template< typename Val > class RegexpMap;
template< typename Val > class RegexpMapIter;
template< typename Val >
class RegexpMapEntry
{
public:
RegexpMapEntry(OUString const & rTheRegexp,
Val * pTheValue):
m_aRegexp(rTheRegexp), m_pValue(pTheValue) {}
const OUString& getRegexp() const { return m_aRegexp; }
Val const & getValue() const { return *m_pValue; }
Val & getValue() { return *m_pValue; }
private:
OUString m_aRegexp;
Val * m_pValue;
};
template< typename Val >
struct Entry
{
Regexp m_aRegexp;
Val m_aValue;
Entry(Regexp const & rTheRegexp, Val const & rTheValue):
m_aRegexp(rTheRegexp), m_aValue(rTheValue) {}
};
template< typename Val >
class RegexpMapConstIter
{
friend class RegexpMap< Val >; // to access m_pImpl, ctor
friend class RegexpMapIter< Val >; // to access m_pImpl, ctor
public:
typedef typename std::vector< Entry< Val > >::iterator ListIterator;
RegexpMapConstIter();
RegexpMapConstIter(RegexpMap< Val > * pTheMap, bool bBegin);
RegexpMapConstIter(RegexpMap< Val > * pTheMap, int nTheList,
ListIterator aTheIndex);
RegexpMapConstIter(RegexpMapConstIter const & rOther);
RegexpMapConstIter & operator =(RegexpMapConstIter const & rOther);
RegexpMapConstIter & operator ++();
RegexpMapEntry< Val > const * operator ->() const;
bool equals(RegexpMapConstIter const & rOther) const;
// for free operator ==(), operator !=()
protected:
RegexpMapEntry< Val > & get() const;
private:
mutable RegexpMapEntry< Val > m_aEntry;
typename std::vector< Entry< Val > >::iterator m_aIndex;
RegexpMap< Val > * m_pMap;
int m_nList;
mutable bool m_bEntrySet;
};
template< typename Val >
RegexpMapConstIter< Val >::RegexpMapConstIter():
m_aEntry(OUString(), nullptr),
m_pMap(nullptr),
m_nList(-1),
m_bEntrySet(false)
{}
template< typename Val >
RegexpMapConstIter< Val >::RegexpMapConstIter(RegexpMap< Val > * pTheMap,
bool bBegin):
m_aEntry(OUString(), nullptr),
m_pMap(pTheMap),
m_bEntrySet(false)
{
if (bBegin)
{
m_nList = -1;
if (!m_pMap->m_pDefault)
operator++();
}
else
{
m_nList = Regexp::KIND_DOMAIN;
m_aIndex = m_pMap->m_aList[Regexp::KIND_DOMAIN].end();
}
}
template< typename Val >
inline RegexpMapConstIter< Val >::RegexpMapConstIter(RegexpMap< Val > * pTheMap,
int nTheList,
ListIterator aTheIndex):
m_aEntry(OUString(), nullptr),
m_aIndex(aTheIndex),
m_pMap(pTheMap),
m_nList(nTheList),
m_bEntrySet(false)
{}
template< typename Val >
RegexpMapConstIter< Val >::RegexpMapConstIter(RegexpMapConstIter const &
rOther):
m_aEntry(rOther.m_aEntry), m_pMap(rOther.m_pMap), m_nList(rOther.m_nList),
m_bEntrySet(rOther.m_bEntrySet)
{
if (m_nList != -1)
m_aIndex = rOther.m_aIndex;
}
template< typename Val >
RegexpMapConstIter< Val > &
RegexpMapConstIter< Val >::operator =(RegexpMapConstIter const & rOther)
{
if (this != &rOther)
{
m_aEntry = rOther.m_aEntry;
m_pMap = rOther.m_pMap;
m_nList = rOther.m_nList;
m_bEntrySet = rOther.m_bEntrySet;
if (m_nList == -1)
m_aIndex = typename std::vector< Entry<Val> >::iterator();
else
m_aIndex = rOther.m_aIndex;
}
return *this;
}
template< typename Val >
RegexpMapConstIter< Val > & RegexpMapConstIter< Val >::operator ++()
{
switch (m_nList)
{
case Regexp::KIND_DOMAIN:
if (m_aIndex == m_pMap->m_aList[m_nList].end())
return *this;
[[fallthrough]];
default:
++m_aIndex;
if (m_nList == Regexp::KIND_DOMAIN
|| m_aIndex != m_pMap->m_aList[m_nList].end())
break;
[[fallthrough]];
case -1:
do
{
++m_nList;
m_aIndex = m_pMap->m_aList[m_nList].begin();
}
while (m_nList < Regexp::KIND_DOMAIN
&& m_aIndex == m_pMap->m_aList[m_nList].end());
break;
}
m_bEntrySet = false;
return *this;
}
template< typename Val >
RegexpMapEntry< Val > & RegexpMapConstIter< Val >::get() const
{
if (!m_bEntrySet)
{
Entry< Val > const & rTheEntry
= m_nList == -1 ? *m_pMap->m_pDefault : *m_aIndex;
m_aEntry
= RegexpMapEntry< Val >(rTheEntry.m_aRegexp.getRegexp(),
const_cast< Val * >(&rTheEntry.m_aValue));
m_bEntrySet = true;
}
return m_aEntry;
}
template< typename Val >
RegexpMapEntry< Val > const * RegexpMapConstIter< Val >::operator ->() const
{
return &get();
}
template< typename Val >
bool RegexpMapConstIter< Val >::equals(RegexpMapConstIter const & rOther)
const
{
return m_pMap == rOther.m_pMap
&& m_nList == rOther.m_nList
&& (m_nList == -1 || m_aIndex == rOther.m_aIndex);
}
template< typename Val >
class RegexpMapIter: public RegexpMapConstIter< Val >
{
friend class RegexpMap< Val >; // to access ctor
public:
RegexpMapIter() {}
RegexpMapIter(RegexpMap< Val > * pTheMap, bool bBegin):
RegexpMapConstIter<Val>(pTheMap, bBegin)
{}
RegexpMapIter(RegexpMap< Val > * pTheMap, int nTheList, typename RegexpMapConstIter< Val >::ListIterator aTheIndex):
RegexpMapConstIter<Val>(pTheMap, nTheList, aTheIndex)
{}
RegexpMapEntry< Val > * operator ->();
RegexpMapEntry< Val > const * operator ->() const;
};
template< typename Val >
RegexpMapEntry< Val > * RegexpMapIter< Val >::operator ->()
{
return &RegexpMapConstIter<Val>::get();
}
template< typename Val >
RegexpMapEntry< Val > const * RegexpMapIter< Val >::operator ->() const
{
return &RegexpMapConstIter<Val>::get();
}
template< typename Val >
class RegexpMap
{
friend class RegexpMapConstIter<Val>;
public:
typedef sal_uInt32 size_type;
typedef RegexpMapIter< Val > iterator;
typedef RegexpMapConstIter< Val > const_iterator;
void add(OUString const & rKey, Val const & rValue);
iterator find(OUString const & rKey);
void erase(iterator const & rPos);
iterator begin();
const_iterator begin() const;
iterator end();
const_iterator end() const;
size_type size() const;
Val const * map(OUString const & rString) const;
private:
std::vector< Entry<Val> > m_aList[Regexp::KIND_DOMAIN + 1];
std::unique_ptr<Entry< Val >> m_pDefault;
};
template< typename Val >
void RegexpMap< Val >::add(OUString const & rKey, Val const & rValue)
{
Regexp aRegexp(Regexp::parse(rKey));
if (aRegexp.isDefault())
{
if (m_pDefault)
{
return;
}
m_pDefault.reset( new Entry< Val >(aRegexp, rValue) );
}
else
{
std::vector< Entry<Val> > & rTheList = m_aList[aRegexp.getKind()];
for (auto const& elem : rTheList)
{
if (elem.m_aRegexp == aRegexp)
{
return;
}
}
rTheList.push_back(Entry< Val >(aRegexp, rValue));
}
}
template< typename Val >
typename RegexpMap< Val >::iterator RegexpMap< Val >::find(OUString const & rKey)
{
Regexp aRegexp(Regexp::parse(rKey));
if (aRegexp.isDefault())
{
if (m_pDefault)
return RegexpMapIter< Val >(this, true);
}
else
{
std::vector< Entry<Val> > & rTheList = m_aList[aRegexp.getKind()];
typename std::vector< Entry<Val> >::iterator aEnd(rTheList.end());
for (typename std::vector< Entry<Val> >::iterator aIt(rTheList.begin()); aIt != aEnd; ++aIt)
if (aIt->m_aRegexp == aRegexp)
return RegexpMapIter< Val >(this, aRegexp.getKind(), aIt);
}
return RegexpMapIter< Val >(this, false);
}
template< typename Val >
void RegexpMap< Val >::erase(iterator const & rPos)
{
assert(rPos.m_pMap == this);
if (rPos.m_pMap == this)
{
if (rPos.m_nList == -1)
{
m_pDefault.reset();
}
else
m_aList[rPos.m_nList].erase(rPos.m_aIndex);
}
}
template< typename Val >
typename RegexpMap< Val >::iterator RegexpMap< Val >::begin()
{
return RegexpMapIter< Val >(this, true);
}
template< typename Val >
typename RegexpMap< Val >::const_iterator RegexpMap< Val >::begin() const
{
return RegexpMapConstIter< Val >(this, true);
}
template< typename Val >
typename RegexpMap< Val >::iterator RegexpMap< Val >::end()
{
return RegexpMapIter< Val >(this, false);
}
template< typename Val >
typename RegexpMap< Val >::const_iterator RegexpMap< Val >::end() const
{
return RegexpMapConstIter< Val >(this, false);
}
template< typename Val >
typename RegexpMap< Val >::size_type RegexpMap< Val >::size() const
{
return (m_pDefault ? 1 : 0)
+ m_aList[Regexp::KIND_PREFIX].size()
+ m_aList[Regexp::KIND_AUTHORITY].size()
+ m_aList[Regexp::KIND_DOMAIN].size();
}
template< typename Val >
Val const * RegexpMap< Val >::map(OUString const & rString) const
{
for (int n = Regexp::KIND_DOMAIN; n >= Regexp::KIND_PREFIX; --n)
{
std::vector< Entry<Val> > const & rTheList = m_aList[n];
for (auto const & rItem : rTheList)
if (rItem.m_aRegexp.matches(rString))
return &rItem.m_aValue;
}
if (m_pDefault
&& m_pDefault->m_aRegexp.matches(rString))
return &m_pDefault->m_aValue;
return nullptr;
}
}
template< typename Val >
inline bool operator ==(ucb_impl::RegexpMapConstIter< Val > const & rIter1,
ucb_impl::RegexpMapConstIter< Val > const & rIter2)
{
return rIter1.equals(rIter2);
}
template< typename Val >
inline bool operator !=(ucb_impl::RegexpMapConstIter< Val > const & rIter1,
ucb_impl::RegexpMapConstIter< Val > const & rIter2)
{
return !rIter1.equals(rIter2);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */