//%2006////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; Symantec Corporation; The Open Group.
//
// 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
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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//==============================================================================
//
//%/////////////////////////////////////////////////////////////////////////////

#include <Pegasus/Common/AcceptLanguageList.h>
#include <Pegasus/Common/LanguageParser.h>
#include <Pegasus/Common/InternalException.h>
#include <Pegasus/Common/AutoPtr.h>
#include <Pegasus/Common/ArrayInternal.h>
#include <Pegasus/Common/Pair.h>

PEGASUS_NAMESPACE_BEGIN

typedef Pair<LanguageTag, Real32> AcceptLanguagePair;
typedef Array<AcceptLanguagePair> AcceptLanguageArray;

#define PEGASUS_ARRAY_T AcceptLanguagePair
# include <Pegasus/Common/ArrayInter.h>
# include "ArrayImpl.h"
#undef PEGASUS_ARRAY_T

//
// Implementation Notes:
// =====================
//
// The internal representation member (_rep) is a pointer to an
// AcceptLanguageListRep object. We could define a class with this name
// as follows:
//
//     class AcceptLanguageListRep
//     {
//         AcceptLanguageArray array;
//     };
//
// But this requires separate heap object to hold the array. Instead we use 
// the following fact to eliminate the extra heap object:
//
//     sizeof(AcceptLanguageArray) == sizeof(AcceptLanguageListRep*)
//
// We know this since all arrays contain a single pointer to a representation
// object. Take for example the following structure:
//
//     class MyClass
//     {
//         void* rep;
//     };
//
// Clearly, sizeof(MyClass) == sizeof(void*). We eliminate the extra heap object
// by overlaying the AcceptLanguageList::_rep pointer with the array base. So
// AcceptLanguageList::_rep in fact refers to the Array<T>::_rep.
//

static inline AcceptLanguageArray& GetAcceptLanguageArray(
    AcceptLanguageList* list)
{
    return *reinterpret_cast<AcceptLanguageArray*>(list);
}

static inline const AcceptLanguageArray& GetAcceptLanguageArray(
    const AcceptLanguageList* list)
{
    return *reinterpret_cast<const AcceptLanguageArray*>(list);
}

AcceptLanguageList::AcceptLanguageList()
{
    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    new (&self) AcceptLanguageArray;
}

AcceptLanguageList::AcceptLanguageList(const AcceptLanguageList& x)
{
    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    const AcceptLanguageArray& other = GetAcceptLanguageArray(&x);
    new (&self) AcceptLanguageArray(other);
}

AcceptLanguageList::~AcceptLanguageList()
{
    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    self.~AcceptLanguageArray();
}

AcceptLanguageList& AcceptLanguageList::operator=(const AcceptLanguageList& x)
{
    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    const AcceptLanguageArray& other = GetAcceptLanguageArray(&x);

    if (&self != &other)
        self = other;
    return *this;
}

Uint32 AcceptLanguageList::size() const
{
    const AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    return self.size();
}

LanguageTag AcceptLanguageList::getLanguageTag(Uint32 index) const
{
    const AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    return self[index].first;
}

Real32 AcceptLanguageList::getQualityValue(Uint32 i) const
{
    const AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    return self[i].second;
}

void AcceptLanguageList::insert(
    const LanguageTag& languageTag,
    Real32 qualityValue)
{
    LanguageParser::validateQualityValue(qualityValue);

    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    Uint32 i;
    Uint32 n = self.size();

    for (i = 0; i < n; i++)
    {
        if (self[i].second < qualityValue)
        {
            // Insert the new element before the element at this index
            break;
        }
    }

    self.insert(i, AcceptLanguagePair(languageTag, qualityValue));
}

void AcceptLanguageList::remove(Uint32 i)
{
    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    self.remove(i);
}

Uint32 AcceptLanguageList::find(const LanguageTag& languageTag) const
{
    const AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    Uint32 n = self.size();

    for (Uint32 i = 0; i < n; i++)
    {
        if (languageTag == self[i].first)
            return i;
    }

    return PEG_NOT_FOUND;
}

void AcceptLanguageList::clear()
{
    AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    self.clear();
}

Boolean AcceptLanguageList::operator==(const AcceptLanguageList& x) const
{
    const AcceptLanguageArray& self = GetAcceptLanguageArray(this);
    const AcceptLanguageArray& other = GetAcceptLanguageArray(&x);

    Uint32 n = self.size();

    if (n != other.size())
        return false;

    for (Uint32 i = 0; i < n; i++)
    {
        if (self[i].first != other[i].first ||
            self[i].second != other[i].second)
        {
            return false;
        }
    }

    return true;
}

Boolean AcceptLanguageList::operator!=(const AcceptLanguageList& x) const
{
    return !operator==(x);
}

PEGASUS_NAMESPACE_END