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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "Names.h"
#include "NameVisitor.h"
#include "Literals.h"
#include <cstring>
#include <cassert>
#include <algorithm>

using namespace CPlusPlus;

QualifiedNameId::~QualifiedNameId()
{ }

void QualifiedNameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

const Identifier *QualifiedNameId::identifier() const
{
    if (const Name *u = unqualifiedNameId())
        return u->identifier();

    return 0;
}

unsigned QualifiedNameId::nameCount() const
{ return _names.size(); }

const Name *QualifiedNameId::nameAt(unsigned index) const
{ return _names[index]; }

bool QualifiedNameId::isGlobal() const
{ return _isGlobal; }

const Name *QualifiedNameId::unqualifiedNameId() const
{
    if (_names.empty())
        return 0;

    return _names.back();
}

bool QualifiedNameId::isEqualTo(const Name *other) const
{
    const QualifiedNameId *q = other->asQualifiedNameId();
    if (! q)
        return false;
    else if (isGlobal() != q->isGlobal())
        return false;
    else {
        const unsigned count = nameCount();
        if (count != q->nameCount())
            return false;
        for (unsigned i = 0; i < count; ++i) {
            const Name *l = nameAt(i);
            const Name *r = q->nameAt(i);
            if (! l->isEqualTo(r))
                return false;
        }
    }
    return true;
}

NameId::NameId(const Identifier *identifier)
    : _identifier(identifier)
{ }

NameId::~NameId()
{ }

void NameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

const Identifier *NameId::identifier() const
{ return _identifier; }

bool NameId::isEqualTo(const Name *other) const
{
    const NameId *nameId = other->asNameId();
    if (! nameId)
        return false;
    const Identifier *l = identifier();
    const Identifier *r = nameId->identifier();
    return l->isEqualTo(r);
}

DestructorNameId::DestructorNameId(const Identifier *identifier)
    : _identifier(identifier)
{ }

DestructorNameId::~DestructorNameId()
{ }

void DestructorNameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

const Identifier *DestructorNameId::identifier() const
{ return _identifier; }

bool DestructorNameId::isEqualTo(const Name *other) const
{
    const DestructorNameId *d = other->asDestructorNameId();
    if (! d)
        return false;
    const Identifier *l = identifier();
    const Identifier *r = d->identifier();
    return l->isEqualTo(r);
}

TemplateNameId::~TemplateNameId()
{ }

void TemplateNameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

const Identifier *TemplateNameId::identifier() const
{ return _identifier; }

unsigned TemplateNameId::templateArgumentCount() const
{ return _templateArguments.size(); }

const FullySpecifiedType &TemplateNameId::templateArgumentAt(unsigned index) const
{ return _templateArguments[index]; }

bool TemplateNameId::isEqualTo(const Name *other) const
{
    const TemplateNameId *t = other->asTemplateNameId();
    if (! t)
        return false;
    const Identifier *l = identifier();
    const Identifier *r = t->identifier();
    if (! l->isEqualTo(r))
        return false;
    if (templateArgumentCount() != t->templateArgumentCount())
        return false;
    for (unsigned i = 0; i < templateArgumentCount(); ++i) {
        const FullySpecifiedType &l = _templateArguments[i];
        const FullySpecifiedType &r = t->_templateArguments[i];
        if (! l.isEqualTo(r))
            return false;
    }
    return true;
}

OperatorNameId::OperatorNameId(int kind)
    : _kind(kind)
{ }

OperatorNameId::~OperatorNameId()
{ }

void OperatorNameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

int OperatorNameId::kind() const
{ return _kind; }

const Identifier *OperatorNameId::identifier() const
{ return 0; }

bool OperatorNameId::isEqualTo(const Name *other) const
{
    const OperatorNameId *o = other->asOperatorNameId();
    if (! o)
        return false;
    return _kind == o->kind();
}

ConversionNameId::ConversionNameId(const FullySpecifiedType &type)
    : _type(type)
{ }

ConversionNameId::~ConversionNameId()
{ }

void ConversionNameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

FullySpecifiedType ConversionNameId::type() const
{ return _type; }

const Identifier *ConversionNameId::identifier() const
{ return 0; }

bool ConversionNameId::isEqualTo(const Name *other) const
{
    const ConversionNameId *c = other->asConversionNameId();
    if (! c)
        return false;
    return _type.isEqualTo(c->type());
}

SelectorNameId::~SelectorNameId()
{ }

void SelectorNameId::accept0(NameVisitor *visitor) const
{ visitor->visit(this); }

const Identifier *SelectorNameId::identifier() const
{
    if (_names.empty())
        return 0;

    return nameAt(0)->identifier();
}

unsigned SelectorNameId::nameCount() const
{ return _names.size(); }

const Name *SelectorNameId::nameAt(unsigned index) const
{ return _names[index]; }

bool SelectorNameId::hasArguments() const
{ return _hasArguments; }

bool SelectorNameId::isEqualTo(const Name *other) const
{
    const SelectorNameId *q = other->asSelectorNameId();
    if (! q)
        return false;
    else if (hasArguments() != q->hasArguments())
        return false;
    else {
        const unsigned count = nameCount();
        if (count != q->nameCount())
            return false;
        for (unsigned i = 0; i < count; ++i) {
            const Name *l = nameAt(i);
            const Name *r = q->nameAt(i);
            if (! l->isEqualTo(r))
                return false;
        }
    }
    return true;
}