forked from OSchip/llvm-project
92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
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// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___FORMAT_FORMATTER_POINTER_H
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#define _LIBCPP___FORMAT_FORMATTER_POINTER_H
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#include <__algorithm/copy.h>
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#include <__availability>
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#include <__config>
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#include <__debug>
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#include <__format/format_error.h>
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#include <__format/format_fwd.h>
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#include <__format/formatter.h>
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#include <__format/formatter_integral.h>
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#include <__format/parser_std_format_spec.h>
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#include <__iterator/access.h>
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#include <__nullptr>
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#include <cstdint>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER > 17
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// TODO FMT Remove this once we require compilers with proper C++20 support.
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// If the compiler has no concepts support, the format header will be disabled.
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// Without concepts support enable_if needs to be used and that too much effort
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// to support compilers with partial C++20 support.
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# if !defined(_LIBCPP_HAS_NO_CONCEPTS)
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namespace __format_spec {
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template <__formatter::__char_type _CharT>
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class _LIBCPP_TEMPLATE_VIS __formatter_pointer : public __parser_pointer<_CharT> {
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public:
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_LIBCPP_HIDE_FROM_ABI auto format(const void* __ptr, auto& __ctx) -> decltype(__ctx.out()) {
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_LIBCPP_ASSERT(this->__alignment != _Flags::_Alignment::__default,
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"The call to parse should have updated the alignment");
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if (this->__width_needs_substitution())
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this->__substitute_width_arg_id(__ctx.arg(this->__width));
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// This code looks a lot like the code to format a hexadecimal integral,
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// but that code isn't public. Making that code public requires some
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// refactoring.
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// TODO FMT Remove code duplication.
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char __buffer[2 + 2 * sizeof(uintptr_t)];
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__buffer[0] = '0';
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__buffer[1] = 'x';
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char* __last = __to_buffer(__buffer + 2, _VSTD::end(__buffer), reinterpret_cast<uintptr_t>(__ptr), 16);
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unsigned __size = __last - __buffer;
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if (__size >= this->__width)
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return _VSTD::copy(__buffer, __last, __ctx.out());
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return __formatter::__write(__ctx.out(), __buffer, __last, __size, this->__width, this->__fill, this->__alignment);
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}
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};
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} // namespace __format_spec
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// [format.formatter.spec]/2.4
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// For each charT, the pointer type specializations template<>
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// - struct formatter<nullptr_t, charT>;
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// - template<> struct formatter<void*, charT>;
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// - template<> struct formatter<const void*, charT>;
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<nullptr_t, _CharT>
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: public __format_spec::__formatter_pointer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<void*, _CharT>
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: public __format_spec::__formatter_pointer<_CharT> {};
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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<const void*, _CharT>
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: public __format_spec::__formatter_pointer<_CharT> {};
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# endif // !defined(_LIBCPP_HAS_NO_CONCEPTS)
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#endif //_LIBCPP_STD_VER > 17
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___FORMAT_FORMATTER_POINTER_H
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