/* -*- 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 .
 */

/*
 * This file is part of LibreOffice published API.
 */
#ifndef INCLUDED_COM_SUN_STAR_UNO_ANY_H
#define INCLUDED_COM_SUN_STAR_UNO_ANY_H

#include "sal/config.h"

#include <cstddef>

#include "rtl/ustring.hxx"
#include "uno/any2.h"
#include "typelib/typedescription.h"
#include "cppu/unotype.hxx"
#include "com/sun/star/uno/TypeClass.hdl"
#include "rtl/alloc.h"

namespace com
{
namespace sun
{
namespace star
{
namespace uno
{

class Type;
template<class interface_type> class Reference;

/** C++ class representing an IDL any.
    This class is used to transport any type defined in IDL. The class inherits from the
    binary C representation of uno_Any.
    You can insert a value by using the <<= operators.
    No any can hold an any. You can extract values from an any by using the >>= operators which
    return true if the any contains an assignable value (no data loss), e.g. the any contains a
    short and you >>= it into a long variable.
*/
class SAL_WARN_UNUSED SAL_DLLPUBLIC_RTTI Any : public uno_Any
{
public:
    /// @cond INTERNAL
    // these are here to force memory de/allocation to sal lib.
    static void * SAL_CALL operator new ( size_t nSize )
        { return ::rtl_allocateMemory( nSize ); }
    static void SAL_CALL operator delete ( void * pMem )
        { ::rtl_freeMemory( pMem ); }
    static void * SAL_CALL operator new ( size_t, void * pMem )
        { return pMem; }
    static void SAL_CALL operator delete ( void *, void * )
        {}
    /// @endcond

    /** Default constructor: Any holds no value; its type is void.
    */
    inline Any();

    /** Templated ctor.  Sets a copy of the given value.

        @param value value of the Any
    */
    template <typename T>
    explicit inline Any( T const & value );
    /// Ctor support for C++ bool.
    explicit inline Any( bool value );

#if defined LIBO_INTERNAL_ONLY
    template<typename T1, typename T2>
    explicit inline Any(rtl::OUStringConcat<T1, T2> && value);
    template<typename T1, typename T2>
    explicit Any(rtl::OUStringConcat<T1, T2> const &) = delete;
    template<std::size_t nBufSize> explicit inline Any(rtl::StringNumber<sal_Unicode, nBufSize> && value);
    template<std::size_t nBufSize> explicit Any(rtl::StringNumber<sal_Unicode, nBufSize> const &) = delete;
    template <std::size_t N> explicit inline Any(const rtl::OUStringLiteral<N>& value);
#endif

    /** Copy constructor: Sets value of the given any.

        @param rAny another any
    */
    inline Any( const Any & rAny );

    /** Constructor: Sets a copy of the given data.

        @param pData_ value
        @param rType type of value
    */
    inline Any( const void * pData_, const Type & rType );

    /** Constructor: Sets a copy of the given data.

        @param pData_ value
        @param pTypeDescr type of value
    */
    inline Any( const void * pData_, typelib_TypeDescription * pTypeDescr );

    /** Constructor: Sets a copy of the given data.

        @param pData_ value
        @param pType_ type of value
    */
    inline Any( const void * pData_, typelib_TypeDescriptionReference * pType_ );

#if defined LIBO_INTERNAL_ONLY
    Any(bool const *, Type const &) = delete;
    Any(bool const *, typelib_TypeDescription *) = delete;
    Any(bool const *, typelib_TypeDescriptionReference *) = delete;
    Any(sal_Bool const *, Type const &) = delete;
    Any(sal_Bool const *, typelib_TypeDescription *) = delete;
    Any(sal_Bool const *, typelib_TypeDescriptionReference *) = delete;
    Any(std::nullptr_t, Type const & type):
        Any(static_cast<void *>(nullptr), type) {}
    Any(std::nullptr_t, typelib_TypeDescription * type):
        Any(static_cast<void *>(nullptr), type) {}
    Any(std::nullptr_t, typelib_TypeDescriptionReference * type):
        Any(static_cast<void *>(nullptr), type) {}
#endif

    /** Destructor: Destructs any content and frees memory.
    */
    inline ~Any();

    /** Assignment operator: Sets the value of the given any.

        @param rAny another any (right side)
        @return this any
    */
    inline Any & SAL_CALL operator = ( const Any & rAny );

#if defined LIBO_INTERNAL_ONLY
    inline Any(Any && other) noexcept;
    inline Any & operator =(Any && other) noexcept;
#endif

    /** Gets the type of the set value.

        @return a Type object of the set value
     */
    const Type & SAL_CALL getValueType() const
        { return * reinterpret_cast< const Type * >( &pType ); }
    /** Gets the type of the set value.

        @return the unacquired type description reference of the set value
     */
    typelib_TypeDescriptionReference * SAL_CALL getValueTypeRef() const
        { return pType; }

    /** Gets the type description of the set value. Provides ownership of the type description!
        Call an explicit typelib_typedescription_release() to release afterwards.

        @param ppTypeDescr a pointer to type description pointer
    */
    void SAL_CALL getValueTypeDescription( typelib_TypeDescription ** ppTypeDescr ) const
        { ::typelib_typedescriptionreference_getDescription( ppTypeDescr, pType ); }

    /** Gets the type class of the set value.

        @return the type class of the set value
     */
    TypeClass SAL_CALL getValueTypeClass() const
        { return static_cast<TypeClass>(pType->eTypeClass); }

    /** Gets the type name of the set value.

        @return the type name of the set value
    */
    inline ::rtl::OUString SAL_CALL getValueTypeName() const;

    /** Tests if any contains a value.

        @return true if any has a value, false otherwise
    */
    bool SAL_CALL hasValue() const
        { return (typelib_TypeClass_VOID != pType->eTypeClass); }

    /** Gets a pointer to the set value.

        @return a pointer to the set value
    */
    const void * SAL_CALL getValue() const
        { return pData; }

    /** Provides a value of specified type, so you can easily write e.g.
        <pre>
        sal_Int32 myVal = myAny.get<sal_Int32>();
        </pre>
        Widening conversion without data loss is taken into account.
        Throws a com::sun::star::uno::RuntimeException if the specified type
        cannot be provided.

        @return value of specified type
        @exception com::sun::star::uno::RuntimeException
                   in case the specified type cannot be provided
    */
    template <typename T>
    inline T get() const;

    /** Sets a value. If the any already contains a value, that value will be destructed
        and its memory freed.

        @param pData_ pointer to value
        @param rType type of value
    */
    inline void SAL_CALL setValue( const void * pData_, const Type & rType );
    /** Sets a value. If the any already contains a value, that value will be destructed
        and its memory freed.

        @param pData_ pointer to value
        @param pType_ type of value
    */
    inline void SAL_CALL setValue( const void * pData_, typelib_TypeDescriptionReference * pType_ );
    /** Sets a value. If the any already contains a value, that value will be destructed
        and its memory freed.

        @param pData_ pointer to value
        @param pTypeDescr type description of value
    */
    inline void SAL_CALL setValue( const void * pData_, typelib_TypeDescription * pTypeDescr );

#if defined LIBO_INTERNAL_ONLY
    void setValue(bool const *, Type const &) = delete;
    void setValue(bool const *, typelib_TypeDescriptionReference *) = delete;
    void setValue(bool const *, typelib_TypeDescription *) = delete;
    void setValue(sal_Bool const *, Type const &) = delete;
    void setValue(sal_Bool const *, typelib_TypeDescriptionReference *)
        = delete;
    void setValue(sal_Bool const *, typelib_TypeDescription *) = delete;
    void setValue(std::nullptr_t, Type const & type)
    { setValue(static_cast<void *>(nullptr), type); }
    void setValue(std::nullptr_t, typelib_TypeDescriptionReference * type)
    { setValue(static_cast<void *>(nullptr), type); }
    void setValue(std::nullptr_t, typelib_TypeDescription * type)
    { setValue(static_cast<void *>(nullptr), type); }
#endif

    /** Clears this any. If the any already contains a value, that value will be destructed
        and its memory freed. After this has been called, the any does not contain a value.
    */
    inline void SAL_CALL clear();

    /** Tests whether this any is extractable to a value of given type.
        Widening conversion without data loss is taken into account.

        @param rType destination type
        @return true if this any is extractable to value of given type (e.g. using >>= operator)
    */
    inline bool SAL_CALL isExtractableTo( const Type & rType ) const;

    /** Tests whether this any can provide a value of specified type.
        Widening conversion without data loss is taken into account.

        @return true if this any can provide a value of specified type
        (e.g. using >>= operator)
    */
    template <typename T>
    inline bool has() const;

    /** Equality operator: compares two anys.
        The values need not be of equal type, e.g. a short integer is compared to a long integer.

        @param rAny another any (right side)
        @return true if both any contains equal values
    */
    inline bool SAL_CALL operator == ( const Any & rAny ) const;
    /** Inequality operator: compares two anys.
        The values need not be of equal type, e.g. a short integer is compared to a long integer.

        @param rAny another any (right side)
        @return true if both any contains unequal values
    */
    inline bool SAL_CALL operator != ( const Any & rAny ) const;

#if defined LIBO_INTERNAL_ONLY
    // Similar to Reference::query/queryThrow, these allow to simplify calling constructors of
    // Reference taking Any. queryThrow is functionally similar to get(), but doesn't require
    // to specify the full Reference type explicitly, only the interface type.
    template<class interface_type> inline Reference<interface_type> query() const;
    template<class interface_type> inline Reference<interface_type> queryThrow() const;
#endif

private:
#if !defined LIBO_INTERNAL_ONLY
    /// @cond INTERNAL
    // Forbid use with ambiguous type (sal_Unicode, sal_uInt16):
    explicit Any(sal_uInt16) SAL_DELETED_FUNCTION;
    /// @endcond
#endif
};

#if !defined LIBO_INTERNAL_ONLY
/// @cond INTERNAL
// Forbid use with ambiguous type (sal_Unicode, sal_uInt16):
template<> sal_uInt16 Any::get<sal_uInt16>() const SAL_DELETED_FUNCTION;
template<> bool Any::has<sal_uInt16>() const SAL_DELETED_FUNCTION;
/// @endcond
#endif

#if !defined LIBO_INTERNAL_ONLY
/** Template function to generically construct an any from a C++ value.

    @deprecated Just use an Any constructor with an appropriately typed argument.  (When the
    (UNO) type recorded in the Any instance shall be different from what would
    be deduced from the (C++) type of the argument, cast the argument to the appropriate type
    first.)

    @tparam C value type
    @param value a value
    @return an any
*/
template< class C >
inline Any SAL_CALL makeAny( const C & value );

template<> inline Any SAL_CALL makeAny(sal_uInt16 const & value);

template<> Any SAL_CALL makeAny(Any const &) SAL_DELETED_FUNCTION;
#endif

/** Wrap a value in an Any, if necessary.

    (A difference to the deprecated makeAny is that makeAny cannot be called on an Any, while
    toAny just returns the given Any.)

    @since LibreOffice 5.0
*/
template<typename T> inline Any toAny(T const & value);

template<> inline Any toAny(Any const & value);

#if defined LIBO_INTERNAL_ONLY

/** Extract a value from an Any, if necessary.

    The difference to operator >>= is that operator >>= cannot be called with an
    Any as right-hand side (in LIBO_INTERNAL_ONLY), while fromAny just passes on
    the given Any (and always succeeds) in the specialization for T = Any.

    @tparam T  any type representing a UNO type

    @param any  any Any value

    @param value  a non-null pointer, receiving the extracted value if
    extraction succeeded (and left unmodified otherwise)

    @return  true iff extraction succeeded

    @since LibreOffice 5.3
*/
template<typename T> inline bool fromAny(Any const & any, T * value);

template<> inline bool fromAny(Any const & any, Any * value);

#endif

class BaseReference;

/** Template binary <<= operator to set the value of an any.

    @tparam C value type
    @param rAny destination any (left side)
    @param value source value (right side)
*/
template< class C >
inline void SAL_CALL operator <<= ( Any & rAny, const C & value );

// additionally for C++ bool:
template<>
inline void SAL_CALL operator <<= ( Any & rAny, bool const & value );

/** Template binary >>= operator to assign a value from an any.
    If the any does not contain a value that can be assigned without data loss, then this
    operation will fail returning false.

    @tparam C value type
    @param rAny source any (left side)
    @param value destination value (right side)
    @return true if assignment was possible without data loss
*/
template< class C >
inline bool SAL_CALL operator >>= ( const Any & rAny, C & value );

/** Template equality operator: compares set value of left side any to right side value.
    The values need not be of equal type, e.g. a short integer is compared to a long integer.
    This operator can be implemented as template member function, if all supported compilers
    can cope with template member functions.

    @tparam C value type
    @param rAny another any (left side)
    @param value a value (right side)
    @return true if values are equal, false otherwise
*/
template< class C >
inline bool SAL_CALL operator == ( const Any & rAny, const C & value );
/** Template inequality operator: compares set value of left side any to right side value.
    The values need not be of equal type, e.g. a short integer is compared to a long integer.
    This operator can be implemented as template member function, if all supported compilers
    can cope with template member functions.

    @tparam C value type
    @param rAny another any (left side)
    @param value a value (right side)
    @return true if values are unequal, false otherwise
*/
template< class C >
inline bool SAL_CALL operator != ( const Any & rAny, const C & value );

// additional specialized >>= and == operators
// bool
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Bool & value );
template<>
inline bool SAL_CALL operator == ( const Any & rAny, const sal_Bool & value );
template<>
inline bool SAL_CALL operator >>= ( Any const & rAny, bool & value );
template<>
inline bool SAL_CALL operator == ( Any const & rAny, bool const & value );
// byte
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int8 & value );
// short
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int16 & value );
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt16 & value );
// long
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int32 & value );
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt32 & value );
// hyper
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_Int64 & value );
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, sal_uInt64 & value );
// float
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, float & value );
// double
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, double & value );
// string
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, ::rtl::OUString & value );
template<>
inline bool SAL_CALL operator == ( const Any & rAny, const ::rtl::OUString & value );
#if defined LIBO_INTERNAL_ONLY
template<std::size_t N>
inline bool SAL_CALL operator == (const Any& rAny, const rtl::OUStringLiteral<N>& value);
#endif
// type
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, Type & value );
template<>
inline bool SAL_CALL operator == ( const Any & rAny, const Type & value );
// any
#if !defined LIBO_INTERNAL_ONLY
template<>
inline bool SAL_CALL operator >>= ( const Any & rAny, Any & value );
#endif
// interface
template<>
inline bool SAL_CALL operator == ( const Any & rAny, const BaseReference & value );

}
}
}
}

/** Gets the meta type of IDL type any.

    There are cases (involving templates) where uses of getCppuType are known to
    not compile.  Use cppu::UnoType or cppu::getTypeFavourUnsigned instead.

    The dummy parameter is just a typed pointer for function signature.

    @return type of IDL type any

    @deprecated
    Use cppu::UnoType instead.
*/
SAL_DEPRECATED("use cppu::UnoType")
inline const ::com::sun::star::uno::Type & SAL_CALL getCppuType( SAL_UNUSED_PARAMETER const ::com::sun::star::uno::Any * )
{
    return ::cppu::UnoType< ::com::sun::star::uno::Any >::get();
}

#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */