227 lines
6.1 KiB
C++
227 lines
6.1 KiB
C++
/*
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* Copyright 2010-2011 PathScale, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stddef.h>
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#include "abi_namespace.h"
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#include "typeinfo"
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namespace ABI_NAMESPACE
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{
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/**
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* Primitive type info, for intrinsic types.
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*/
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struct __fundamental_type_info : public std::type_info
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{
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virtual ~__fundamental_type_info();
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};
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/**
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* Type info for arrays.
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*/
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struct __array_type_info : public std::type_info
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{
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virtual ~__array_type_info();
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};
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/**
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* Type info for functions.
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*/
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struct __function_type_info : public std::type_info
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{
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virtual ~__function_type_info();
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};
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/**
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* Type info for enums.
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*/
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struct __enum_type_info : public std::type_info
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{
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virtual ~__enum_type_info();
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};
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/**
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* Base class for class type info. Used only for tentative definitions.
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*/
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struct __class_type_info : public std::type_info
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{
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virtual ~__class_type_info();
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/**
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* Function implementing dynamic casts.
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*/
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virtual void *cast_to(void *obj,
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const struct __class_type_info *other) const;
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/**
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* Function returning whether a cast from this type to another type is
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* possible.
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*/
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virtual bool can_cast_to(const struct __class_type_info *other) const;
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};
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/**
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* Single-inheritance class type info. This is used for classes containing
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* a single non-virtual base class at offset 0.
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*/
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struct __si_class_type_info : public __class_type_info
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{
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virtual ~__si_class_type_info();
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const __class_type_info *__base_type;
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virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
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virtual bool can_cast_to(const struct __class_type_info *other) const;
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};
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/**
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* Type info for base classes. Classes with multiple bases store an array
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* of these, one for each superclass.
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*/
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struct __base_class_type_info
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{
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const __class_type_info *__base_type;
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private:
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/**
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* The high __offset_shift bits of this store the (signed) offset
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* of the base class. The low bits store flags from
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* __offset_flags_masks.
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*/
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long __offset_flags;
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/**
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* Flags used in the low bits of __offset_flags.
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*/
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enum __offset_flags_masks
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{
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/** This base class is virtual. */
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__virtual_mask = 0x1,
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/** This base class is public. */
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__public_mask = 0x2,
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/** The number of bits reserved for flags. */
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__offset_shift = 8
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};
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public:
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/**
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* Returns the offset of the base class.
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*/
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long offset() const
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{
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return __offset_flags >> __offset_shift;
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}
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/**
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* Returns the flags.
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*/
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long flags() const
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{
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return __offset_flags & ((1 << __offset_shift) - 1);
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}
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/**
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* Returns whether this is a public base class.
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*/
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bool isPublic() const { return flags() & __public_mask; }
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/**
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* Returns whether this is a virtual base class.
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*/
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bool isVirtual() const { return flags() & __virtual_mask; }
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};
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/**
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* Type info for classes with virtual bases or multiple superclasses.
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*/
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struct __vmi_class_type_info : public __class_type_info
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{
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virtual ~__vmi_class_type_info();
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/** Flags describing this class. Contains values from __flags_masks. */
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unsigned int __flags;
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/** The number of base classes. */
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unsigned int __base_count;
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/**
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* Array of base classes - this actually has __base_count elements, not
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* 1.
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*/
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__base_class_type_info __base_info[1];
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/**
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* Flags used in the __flags field.
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*/
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enum __flags_masks
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{
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/** The class has non-diamond repeated inheritance. */
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__non_diamond_repeat_mask = 0x1,
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/** The class is diamond shaped. */
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__diamond_shaped_mask = 0x2
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};
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virtual void *cast_to(void *obj, const struct __class_type_info *other) const;
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virtual bool can_cast_to(const struct __class_type_info *other) const;
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};
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/**
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* Base class used for both pointer and pointer-to-member type info.
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*/
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struct __pbase_type_info : public std::type_info
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{
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virtual ~__pbase_type_info();
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/**
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* Flags. Values from __masks.
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*/
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unsigned int __flags;
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/**
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* The type info for the pointee.
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*/
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const std::type_info *__pointee;
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/**
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* Masks used for qualifiers on the pointer.
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*/
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enum __masks
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{
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/** Pointer has const qualifier. */
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__const_mask = 0x1,
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/** Pointer has volatile qualifier. */
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__volatile_mask = 0x2,
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/** Pointer has restrict qualifier. */
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__restrict_mask = 0x4,
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/** Pointer points to an incomplete type. */
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__incomplete_mask = 0x8,
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/** Pointer is a pointer to a member of an incomplete class. */
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__incomplete_class_mask = 0x10
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};
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};
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/**
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* Pointer type info.
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*/
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struct __pointer_type_info : public __pbase_type_info
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{
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virtual ~__pointer_type_info();
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};
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/**
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* Pointer to member type info.
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*/
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struct __pointer_to_member_type_info : public __pbase_type_info
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{
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virtual ~__pointer_to_member_type_info();
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/**
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* Pointer to the class containing this member.
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*/
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const __class_type_info *__context;
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};
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}
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