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