634 lines
20 KiB
C++
634 lines
20 KiB
C++
/*
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* This file is part of the DXX-Rebirth project <http://www.dxx-rebirth.com/>.
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* It is copyright by its individual contributors, as recorded in the
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* project's Git history. See COPYING.txt at the top level for license
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* terms and a link to the Git history.
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*/
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#pragma once
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#include <cstddef>
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#include <stdexcept>
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#include "dxxsconf.h"
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#include "compiler-type_traits.h"
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#include "pack.h"
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#ifdef DXX_HAVE_BUILTIN_CONSTANT_P
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#define DXX_VALPTRIDX_STATIC_CHECK(E,F,S) \
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((void)(dxx_builtin_constant_p((E)) && !(E) && \
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(DXX_ALWAYS_ERROR_FUNCTION(F,S), 0)))
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#define DXX_VALPTRIDX_INLINE_STATIC_CHECK inline
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#else
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#define DXX_VALPTRIDX_STATIC_CHECK(E,F,S) \
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((void)0)
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#define DXX_VALPTRIDX_INLINE_STATIC_CHECK
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#endif
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#ifdef DXX_HAVE_CXX11_REF_QUALIFIER
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#define DXX_VALPTRIDX_REF_QUALIFIER_LVALUE &
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#else
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#define DXX_VALPTRIDX_REF_QUALIFIER_LVALUE
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#endif
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#define DXX_VALPTRIDX_CHECK(E,S,success,failure) \
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( \
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DXX_VALPTRIDX_STATIC_CHECK(E,dxx_trap_##failure,S), \
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(E) ? success : throw failure(S) \
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)
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/* Never used with an actual void, but needed for proper two-stage
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* lookup.
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*/
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template <typename T>
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typename tt::enable_if<tt::is_void<T>::value, void>::type get_global_array(T *);
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template <typename P, typename I>
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class valbaseptridxutil_t
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{
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protected:
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struct null_pointer_exception : std::logic_error {
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null_pointer_exception(const char *s) : std::logic_error(s) {}
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};
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struct index_mismatch_exception : std::logic_error {
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index_mismatch_exception(const char *s) : std::logic_error(s) {}
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};
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struct index_range_exception : std::out_of_range {
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index_range_exception(const char *s) : std::out_of_range(s) {}
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};
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typedef P *pointer_type;
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typedef I index_type;
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typedef typename tt::remove_const<P>::type Prc;
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static constexpr decltype(get_global_array(pointer_type())) get_array()
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{
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return get_global_array(pointer_type());
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}
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static const P *check_null_pointer(const P *p) __attribute_warn_unused_result
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{
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return DXX_VALPTRIDX_CHECK(p, "NULL pointer used", p, null_pointer_exception);
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}
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static Prc *check_null_pointer(Prc *p) __attribute_warn_unused_result
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{
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return DXX_VALPTRIDX_CHECK(p, "NULL pointer used", p, null_pointer_exception);
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}
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template <typename A>
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static DXX_VALPTRIDX_INLINE_STATIC_CHECK __attribute_warn_unused_result index_type check_index_match(const A &a, pointer_type p, index_type s)
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{
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return DXX_VALPTRIDX_CHECK(&a[s] == p, "pointer/index mismatch", s, index_mismatch_exception);
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}
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template <typename A>
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static DXX_VALPTRIDX_INLINE_STATIC_CHECK __attribute_warn_unused_result index_type check_index_range(const A &a, index_type s)
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{
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return DXX_VALPTRIDX_CHECK(static_cast<std::size_t>(s) < a.size(), "invalid index used in array subscript", s, index_range_exception);
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}
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};
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template <typename P, typename I>
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class vvalptr_t;
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template <typename P, typename I, template <I> class magic_constant>
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class vvalidx_t;
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template <typename P, typename I, template <I> class magic_constant>
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class validx_t;
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template <
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bool require_valid,
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typename P, typename I, template <I> class magic_constant,
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typename Prc = typename tt::remove_const<P>::type>
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struct valptridx_template_t;
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template <typename P, typename I>
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class valptr_t : protected valbaseptridxutil_t<P, I>
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{
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typedef valbaseptridxutil_t<P, I> valutil;
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protected:
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typedef typename valutil::Prc Prc;
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typedef valptr_t valptr_type;
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using valutil::check_null_pointer;
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using valutil::check_index_range;
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public:
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const P *unchecked_const_pointer() const { return p; }
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/* Indirect through the extra version to get a good compiler
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* backtrace when misuse happens.
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*/
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Prc *unchecked_mutable_pointer(const P *) const = delete;
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Prc *unchecked_mutable_pointer(Prc *) const { return p; }
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Prc *unchecked_mutable_pointer() const { return unchecked_mutable_pointer(static_cast<P *>(nullptr)); }
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typedef typename valutil::pointer_type pointer_type;
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typedef P &reference;
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valptr_t() = delete;
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valptr_t(I) = delete;
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valptr_t(vvalptr_t<const P, I> &&) = delete;
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valptr_t(vvalptr_t<Prc, I> &&) = delete;
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valptr_t(std::nullptr_t) : p(nullptr) {}
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template <template <I> class magic_constant>
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valptr_t(valptridx_template_t<true, const P, I, magic_constant> v) :
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p(v)
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{
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}
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template <template <I> class magic_constant>
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valptr_t(valptridx_template_t<true, Prc, I, magic_constant> v) :
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p(v)
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{
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}
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template <template <I> class magic_constant>
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valptr_t(valptridx_template_t<false, const P, I, magic_constant> v) :
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p(v)
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{
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}
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template <template <I> class magic_constant>
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valptr_t(valptridx_template_t<false, Prc, I, magic_constant> v) :
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p(v)
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{
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}
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valptr_t(const valptr_t<const P, I> &t) :
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p(t.unchecked_const_pointer())
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{
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}
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valptr_t(const valptr_t<Prc, I> &t) :
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p(t.unchecked_mutable_pointer())
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{
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}
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valptr_t(const vvalptr_t<const P, I> &t);
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valptr_t(const vvalptr_t<Prc, I> &t);
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template <typename A>
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valptr_t(A &, pointer_type p) :
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p(p)
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{
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}
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valptr_t(pointer_type p) :
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p(p)
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{
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}
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pointer_type operator->() const DXX_VALPTRIDX_REF_QUALIFIER_LVALUE { return *this; }
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operator const P *() const DXX_VALPTRIDX_REF_QUALIFIER_LVALUE { return check_null_pointer(unchecked_const_pointer()); }
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operator Prc *() const DXX_VALPTRIDX_REF_QUALIFIER_LVALUE { return check_null_pointer(unchecked_mutable_pointer()); }
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#ifdef DXX_HAVE_CXX11_REF_QUALIFIER
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pointer_type operator->() const && = delete;
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operator const P *() const && = delete;
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operator Prc *() const && = delete;
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#endif
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reference operator*() const { return *check_null_pointer(p); }
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/* Only vvalptr_t can implicitly convert to reference */
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operator reference() const = delete;
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explicit operator bool() const { return *this != nullptr; }
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template <typename R>
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bool operator!=(const R &rhs) const
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{
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return !(*this == rhs);
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}
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bool operator==(const valptr_t<Prc, I> &rhs) const { return p == rhs.p; }
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bool operator==(const valptr_t<P const, I> &rhs) const { return p == rhs.p; }
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bool operator==(Prc *rhs) const { return p == rhs; }
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bool operator==(P const *rhs) const { return p == rhs; }
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bool operator==(std::nullptr_t) const { return p == nullptr; }
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template <typename U>
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typename tt::enable_if<!tt::is_base_of<valptr_t, U>::value, bool>::type operator==(U) const = delete;
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template <typename U>
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long operator-(U) const = delete;
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template <typename R>
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bool operator<(R) const = delete;
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template <typename R>
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bool operator>(R) const = delete;
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template <typename R>
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bool operator<=(R) const = delete;
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template <typename R>
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bool operator>=(R) const = delete;
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protected:
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template <typename A>
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valptr_t(A &a, I i) :
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p(&a[check_index_range(a, i)])
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{
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}
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pointer_type p;
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};
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template <typename P, typename I, template <I> class magic_constant>
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class validx_t : protected valbaseptridxutil_t<P, I>
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{
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typedef valbaseptridxutil_t<P, I> valutil;
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protected:
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using valutil::check_index_match;
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using valutil::check_index_range;
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typedef validx_t validx_type;
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public:
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typedef typename valutil::pointer_type pointer_type;
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typedef typename valutil::index_type index_type;
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typedef I integral_type;
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validx_t() = delete;
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validx_t(P) = delete;
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template <integral_type v>
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validx_t(const magic_constant<v> &) :
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i(v)
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{
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}
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validx_t(vvalidx_t<P, I, magic_constant> &&) = delete;
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template <typename A>
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validx_t(A &a, pointer_type p, index_type s) :
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i(s != ~static_cast<integral_type>(0) ? check_index_match(a, p, check_index_range(a, s)) : s)
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{
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}
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template <typename A>
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validx_t(A &a, index_type s) :
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i(s != ~static_cast<integral_type>(0) ? check_index_range(a, s) : s)
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{
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}
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operator const index_type&() const { return i; }
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template <integral_type v>
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bool operator==(const magic_constant<v> &) const
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{
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return i == v;
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}
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bool operator==(const index_type &rhs) const { return i == rhs; }
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// Compatibility hack since some object numbers are in int, not
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// short
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bool operator==(const int &rhs) const { return i == rhs; }
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template <typename R>
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bool operator!=(const R &rhs) const
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{
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return !(*this == rhs);
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}
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bool operator==(const validx_t &rhs) const
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{
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return i == rhs.i;
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}
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template <typename U>
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typename tt::enable_if<!tt::is_base_of<validx_t, U>::value && !tt::is_base_of<U, validx_t>::value, bool>::type operator==(U) const = delete;
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template <typename R>
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bool operator<(R) const = delete;
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template <typename R>
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bool operator>(R) const = delete;
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template <typename R>
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bool operator<=(R) const = delete;
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template <typename R>
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bool operator>=(R) const = delete;
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protected:
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validx_t(index_type s) :
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i(s)
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{
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}
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index_type i;
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};
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template <bool, typename P, typename I, template <I> class magic_constant>
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struct valptridx_dispatch_require_valid
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{
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typedef valptr_t<P, I> vptr_type;
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typedef validx_t<P, I, magic_constant> vidx_type;
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};
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template <typename P, typename I, template <I> class magic_constant>
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struct valptridx_dispatch_require_valid<true, P, I, magic_constant>
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{
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typedef vvalptr_t<P, I> vptr_type;
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typedef vvalidx_t<P, I, magic_constant> vidx_type;
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};
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/*
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* A data type for passing both a pointer and its offset in an
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* agreed-upon array. Useful for Segments, Objects.
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*/
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template <
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bool require_valid,
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typename P, typename I, template <I> class magic_constant,
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typename Prc>
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struct valptridx_template_t :
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valptridx_dispatch_require_valid<require_valid, P, I, magic_constant>::vptr_type,
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valptridx_dispatch_require_valid<require_valid, P, I, magic_constant>::vidx_type
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{
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typedef typename valptridx_dispatch_require_valid<require_valid, P, I, magic_constant>::vptr_type vptr_type;
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typedef typename valptridx_dispatch_require_valid<require_valid, P, I, magic_constant>::vidx_type vidx_type;
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typedef valptridx_template_t valptridx_type;
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protected:
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using vidx_type::get_array;
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public:
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typedef typename vptr_type::pointer_type pointer_type;
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typedef typename vptr_type::reference reference;
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typedef typename vidx_type::index_type index_type;
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typedef typename vidx_type::integral_type integral_type;
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operator const vptr_type &() const { return *this; }
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operator const vidx_type &() const { return *this; }
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using vptr_type::operator==;
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using vidx_type::operator==;
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using vidx_type::operator<;
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using vidx_type::operator<=;
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using vidx_type::operator>;
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using vidx_type::operator>=;
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using vidx_type::operator const index_type&;
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valptridx_template_t() = delete;
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valptridx_template_t(std::nullptr_t) = delete;
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/* Swapped V0/V1 matches rvalue construction to/from always-valid type */
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valptridx_template_t(valptridx_template_t<!require_valid, const P, I, magic_constant> &&) = delete;
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valptridx_template_t(valptridx_template_t<!require_valid, Prc, I, magic_constant> &&) = delete;
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/* Convenience conversion to/from always-valid. Throws on attempt
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* to make an always-valid from an invalid maybe-valid.
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*/
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valptridx_template_t(const valptridx_template_t<!require_valid, const P, I, magic_constant> &t) :
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vptr_type(t.operator const typename valptridx_dispatch_require_valid<!require_valid, const P, I, magic_constant>::vptr_type &()),
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vidx_type(t.operator const typename valptridx_dispatch_require_valid<!require_valid, const P, I, magic_constant>::vidx_type &())
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{
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}
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valptridx_template_t(const valptridx_template_t<!require_valid, Prc, I, magic_constant> &t) :
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vptr_type(t.operator const typename valptridx_dispatch_require_valid<!require_valid, Prc, I, magic_constant>::vptr_type &()),
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vidx_type(t.operator const typename valptridx_dispatch_require_valid<!require_valid, Prc, I, magic_constant>::vidx_type &())
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{
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}
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/* Copy construction from like type, possibly const-qualified */
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valptridx_template_t(const valptridx_template_t<require_valid, const P, I, magic_constant> &t) :
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vptr_type(t.operator const typename valptridx_dispatch_require_valid<require_valid, const P, I, magic_constant>::vptr_type &()),
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vidx_type(t.operator const typename valptridx_dispatch_require_valid<require_valid, const P, I, magic_constant>::vidx_type &())
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{
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}
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valptridx_template_t(const valptridx_template_t<require_valid, Prc, I, magic_constant> &t) :
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vptr_type(t.operator const typename valptridx_dispatch_require_valid<require_valid, Prc, I, magic_constant>::vptr_type &()),
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vidx_type(t.operator const typename valptridx_dispatch_require_valid<require_valid, Prc, I, magic_constant>::vidx_type &())
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{
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}
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template <integral_type v>
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valptridx_template_t(const magic_constant<v> &m) :
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vptr_type(static_cast<std::size_t>(v) < get_array().size() ? &get_array()[v] : NULL),
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vidx_type(m)
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{
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}
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template <typename A>
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valptridx_template_t(A &a, pointer_type p, index_type s) :
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vptr_type(a, p),
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vidx_type(a, p, s)
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{
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}
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template <typename A>
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valptridx_template_t(A &a, pointer_type p) :
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vptr_type(a, p),
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vidx_type(a, p, p-a)
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{
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}
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valptridx_template_t(pointer_type p) :
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vptr_type(p),
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vidx_type(get_array(), p, p-get_array())
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{
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}
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template <typename A>
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valptridx_template_t(A &a, index_type s) :
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vptr_type(a, s),
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vidx_type(a, s)
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{
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}
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valptridx_template_t(index_type s) :
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vptr_type(get_array(), static_cast<std::size_t>(s) < get_array().size() ? &get_array()[s] : NULL),
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vidx_type(get_array(), s)
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{
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}
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template <
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bool erv,
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typename EP>
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/* Reuse Prc to enforce is_same<remove_const<EP>::type,
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* remove_const<P>::type>.
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*/
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bool operator==(const valptridx_template_t<erv, EP, I, magic_constant, Prc> &rhs) const
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{
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typedef valptridx_template_t<erv, EP, I, magic_constant, Prc> rhs_t;
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return vptr_type::operator==(rhs.operator const typename rhs_t::vptr_type &()) &&
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vidx_type::operator==(rhs.operator const typename rhs_t::vidx_type &());
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}
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template <typename R>
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bool operator!=(const R &rhs) const
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{
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return !(*this == rhs);
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}
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};
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template <typename P, typename I>
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class vvalptr_t : public valptr_t<P, I>
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{
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typedef valptr_t<P, I> base_t;
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using base_t::check_null_pointer;
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typedef typename base_t::Prc Prc;
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protected:
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typedef vvalptr_t valptr_type;
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public:
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typedef typename base_t::pointer_type pointer_type;
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typedef typename base_t::reference reference;
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using base_t::operator==;
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pointer_type operator->() const DXX_VALPTRIDX_REF_QUALIFIER_LVALUE { return *this; }
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operator const P *() const DXX_VALPTRIDX_REF_QUALIFIER_LVALUE { return base_t::unchecked_const_pointer(); }
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operator Prc *() const DXX_VALPTRIDX_REF_QUALIFIER_LVALUE { return base_t::unchecked_mutable_pointer(); }
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reference operator*() const { return *this; }
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operator reference() const { return *static_cast<pointer_type>(*this); }
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vvalptr_t() = delete;
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vvalptr_t(I) = delete;
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vvalptr_t(std::nullptr_t) = delete;
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vvalptr_t(base_t &&) = delete;
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vvalptr_t(const valptr_t<const P, I> &t) :
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base_t(check_null_pointer(static_cast<const P *>(t)))
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{
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}
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vvalptr_t(const valptr_t<Prc, I> &t) :
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base_t(check_null_pointer(static_cast<Prc *>(t)))
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{
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}
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vvalptr_t(const vvalptr_t<const P, I> &t) :
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base_t(t)
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{
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}
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vvalptr_t(const vvalptr_t<Prc, I> &t) :
|
|
base_t(t)
|
|
{
|
|
}
|
|
template <typename A>
|
|
vvalptr_t(A &a, pointer_type p) :
|
|
base_t(a, check_null_pointer(p))
|
|
{
|
|
}
|
|
template <typename A>
|
|
vvalptr_t(A &a, I i) :
|
|
base_t(a, i)
|
|
{
|
|
}
|
|
vvalptr_t(pointer_type p) :
|
|
base_t(check_null_pointer(p))
|
|
{
|
|
}
|
|
template <template <I> class magic_constant>
|
|
vvalptr_t(valptridx_template_t<true, const P, I, magic_constant> v) :
|
|
base_t(v)
|
|
{
|
|
}
|
|
template <template <I> class magic_constant>
|
|
vvalptr_t(valptridx_template_t<true, Prc, I, magic_constant> v) :
|
|
base_t(v)
|
|
{
|
|
}
|
|
template <template <I> class magic_constant>
|
|
vvalptr_t(valptridx_template_t<false, const P, I, magic_constant> v) :
|
|
base_t(check_null_pointer(static_cast<const P *>(v)))
|
|
{
|
|
}
|
|
template <template <I> class magic_constant>
|
|
vvalptr_t(valptridx_template_t<false, Prc, I, magic_constant> v) :
|
|
base_t(check_null_pointer(static_cast<Prc *>(v)))
|
|
{
|
|
}
|
|
bool operator==(std::nullptr_t) const = delete;
|
|
template <typename R>
|
|
bool operator!=(const R &rhs) const
|
|
{
|
|
return !(*this == rhs);
|
|
}
|
|
};
|
|
|
|
template <typename P, typename I>
|
|
valptr_t<P, I>::valptr_t(const vvalptr_t<const P, I> &t) :
|
|
p(t)
|
|
{
|
|
}
|
|
|
|
template <typename P, typename I>
|
|
valptr_t<P, I>::valptr_t(const vvalptr_t<Prc, I> &t) :
|
|
p(t)
|
|
{
|
|
}
|
|
|
|
template <typename P, typename I, template <I> class magic_constant>
|
|
class vvalidx_t : public validx_t<P, I, magic_constant>
|
|
{
|
|
typedef validx_t<P, I, magic_constant> base_t;
|
|
protected:
|
|
using base_t::get_array;
|
|
using base_t::check_index_match;
|
|
using base_t::check_index_range;
|
|
typedef vvalidx_t validx_type;
|
|
public:
|
|
typedef typename base_t::index_type index_type;
|
|
typedef typename base_t::integral_type integral_type;
|
|
typedef typename base_t::pointer_type pointer_type;
|
|
template <integral_type v>
|
|
vvalidx_t(const magic_constant<v> &m) :
|
|
base_t(check_constant_index(m))
|
|
{
|
|
}
|
|
vvalidx_t() = delete;
|
|
vvalidx_t(P) = delete;
|
|
vvalidx_t(base_t &&) = delete;
|
|
vvalidx_t(const base_t &t) :
|
|
base_t(check_index_range(get_array(), t))
|
|
{
|
|
}
|
|
template <typename A>
|
|
vvalidx_t(A &a, index_type s) :
|
|
base_t(check_index_range(a, s))
|
|
{
|
|
}
|
|
template <typename A>
|
|
vvalidx_t(A &a, pointer_type p, index_type s) :
|
|
base_t(check_index_match(a, p, check_index_range(a, s)))
|
|
{
|
|
}
|
|
vvalidx_t(index_type s) :
|
|
base_t(check_index_range(get_array(), s))
|
|
{
|
|
}
|
|
template <integral_type v>
|
|
static constexpr const magic_constant<v> &check_constant_index(const magic_constant<v> &m)
|
|
{
|
|
#ifndef constexpr
|
|
static_assert(static_cast<std::size_t>(v) < get_array().size(), "invalid index used");
|
|
#endif
|
|
return m;
|
|
}
|
|
using base_t::operator==;
|
|
template <integral_type v>
|
|
bool operator==(const magic_constant<v> &m) const
|
|
{
|
|
return base_t::operator==(check_constant_index(m));
|
|
}
|
|
template <typename R>
|
|
bool operator!=(const R &rhs) const
|
|
{
|
|
return !(*this == rhs);
|
|
}
|
|
};
|
|
|
|
template <typename A, A &a, typename vptr, typename vptridx>
|
|
struct vvalptr_functions
|
|
{
|
|
vptr operator()(typename vptr::pointer_type p) const
|
|
{
|
|
return {a, p};
|
|
}
|
|
vptr operator()(typename vptridx::integral_type i) const
|
|
{
|
|
return {a, i};
|
|
}
|
|
template <typename T>
|
|
vptr operator()(T) const = delete;
|
|
void *operator &() = delete;
|
|
};
|
|
|
|
template <typename A, A &a, typename ptridx>
|
|
struct valptridx_functions
|
|
{
|
|
ptridx operator()(typename ptridx::index_type i) const
|
|
{
|
|
return {a, i};
|
|
}
|
|
template <typename T>
|
|
typename tt::enable_if<!tt::is_convertible<T, typename ptridx::index_type>::value, ptridx>::type operator()(T) const = delete;
|
|
void *operator &() = delete;
|
|
};
|
|
|
|
template <typename A, A &a, typename vptridx>
|
|
struct vvalptridx_functions : valptridx_functions<A, a, vptridx>
|
|
{
|
|
typedef valptridx_functions<A, a, vptridx> base_t;
|
|
using base_t::operator();
|
|
vptridx operator()(typename vptridx::pointer_type p) const
|
|
{
|
|
return {a, p};
|
|
}
|
|
void *operator &() = delete;
|
|
};
|
|
|
|
#define _DEFINE_VALPTRIDX_SUBTYPE_USERTYPE(N,P,I,A,prefix,Pconst) \
|
|
struct prefix##ptr_t : \
|
|
prohibit_void_ptr<prefix##ptr_t>, \
|
|
valptr_t<P Pconst, I> \
|
|
{ \
|
|
DXX_INHERIT_CONSTRUCTORS(prefix##ptr_t, valptr_type); \
|
|
}; \
|
|
struct v##prefix##ptr_t : \
|
|
prohibit_void_ptr<v##prefix##ptr_t>, \
|
|
vvalptr_t<P Pconst, I> \
|
|
{ \
|
|
DXX_INHERIT_CONSTRUCTORS(v##prefix##ptr_t, valptr_type); \
|
|
}; \
|
|
\
|
|
struct prefix##ptridx_t : \
|
|
prohibit_void_ptr<prefix##ptridx_t>, \
|
|
valptridx_template_t<false, P Pconst, I, P##_magic_constant_t> \
|
|
{ \
|
|
DXX_INHERIT_CONSTRUCTORS(prefix##ptridx_t, valptridx_type); \
|
|
}; \
|
|
\
|
|
struct v##prefix##ptridx_t : \
|
|
prohibit_void_ptr<v##prefix##ptridx_t>, \
|
|
valptridx_template_t<true, P Pconst, I, P##_magic_constant_t> \
|
|
{ \
|
|
DXX_INHERIT_CONSTRUCTORS(v##prefix##ptridx_t, valptridx_type); \
|
|
}; \
|
|
\
|
|
const vvalptr_functions<Pconst decltype(A), A, v##prefix##ptr_t, v##prefix##ptridx_t> v##prefix##ptr{}; \
|
|
const valptridx_functions<Pconst decltype(A), A, prefix##ptridx_t> prefix##ptridx{}; \
|
|
const vvalptridx_functions<Pconst decltype(A), A, v##prefix##ptridx_t> v##prefix##ptridx{}; \
|
|
static inline v##prefix##ptridx_t operator-(P Pconst *o, decltype(A) Pconst &O) \
|
|
{ \
|
|
return {A, o, static_cast<v##prefix##ptridx_t::integral_type>(const_cast<const P *>(o) - &(const_cast<const decltype(A) &>(O).front()))}; \
|
|
} \
|
|
|
|
#define DEFINE_VALPTRIDX_SUBTYPE(N,P,I,A) \
|
|
static inline constexpr decltype(A) &get_global_array(P *) { return A; } \
|
|
/* "decltype(A) const &" parses correctly, but fails to match */ \
|
|
static inline constexpr typename tt::add_const<decltype(A)>::type &get_global_array(P const *) { return A; } \
|
|
\
|
|
_DEFINE_VALPTRIDX_SUBTYPE_USERTYPE(N,P,I,A,N,); \
|
|
_DEFINE_VALPTRIDX_SUBTYPE_USERTYPE(N,P,I,A,c##N,const) \
|
|
|