mirror of
https://github.com/jart/cosmopolitan.git
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Upgrade to 2022-era LLVM LIBCXX
This commit is contained in:
Justine Tunney
parent
2f4ca71f26
commit
8e68384e15
2078 changed files with 165657 additions and 65010 deletions
586
third_party/libcxx/charconv
vendored
586
third_party/libcxx/charconv
vendored
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@ -1,5 +1,5 @@
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// -*- C++ -*-
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//===------------------------------ charconv ------------------------------===//
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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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@ -10,24 +10,6 @@
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#ifndef _LIBCPP_CHARCONV
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#define _LIBCPP_CHARCONV
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#include "third_party/libcxx/__errc"
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#include "third_party/libcxx/type_traits"
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#include "third_party/libcxx/limits"
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#include "third_party/libcxx/string.h"
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#include "libc/literal.h"
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#include "third_party/libcxx/math.h"
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#include "third_party/libcxx/__debug"
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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_PUSH_MACROS
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#include "third_party/libcxx/__undef_macros"
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_LIBCPP_BEGIN_NAMESPACE_STD
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/*
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charconv synopsis
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@ -45,10 +27,13 @@ namespace std {
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struct to_chars_result {
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char* ptr;
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errc ec;
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friend bool operator==(const to_chars_result&, const to_chars_result&) = default; // since C++20
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};
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to_chars_result to_chars(char* first, char* last, see below value,
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int base = 10);
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constexpr to_chars_result to_chars(char* first, char* last, see below value,
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int base = 10); // constexpr since C++23
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to_chars_result to_chars(char* first, char* last, bool value,
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int base = 10) = delete;
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to_chars_result to_chars(char* first, char* last, float value);
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to_chars_result to_chars(char* first, char* last, double value);
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@ -72,545 +57,48 @@ namespace std {
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struct from_chars_result {
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const char* ptr;
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errc ec;
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friend bool operator==(const from_chars_result&, const from_chars_result&) = default; // since C++20
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};
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from_chars_result from_chars(const char* first, const char* last,
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see below& value, int base = 10);
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from_chars_result from_chars(const char* first, const char* last,
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float& value,
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chars_format fmt = chars_format::general);
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from_chars_result from_chars(const char* first, const char* last,
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double& value,
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chars_format fmt = chars_format::general);
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from_chars_result from_chars(const char* first, const char* last,
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long double& value,
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chars_format fmt = chars_format::general);
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constexpr from_chars_result from_chars(const char* first, const char* last,
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see below& value, int base = 10); // constexpr since C++23
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} // namespace std
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*/
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namespace __itoa {
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_LIBCPP_FUNC_VIS char* __u64toa(uint64_t __value, char* __buffer);
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_LIBCPP_FUNC_VIS char* __u32toa(uint32_t __value, char* __buffer);
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}
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#include <__assert> // all public C++ headers provide the assertion handler
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#include <__charconv/chars_format.h>
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#include <__charconv/from_chars_integral.h>
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#include <__charconv/from_chars_result.h>
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#include <__charconv/tables.h>
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#include <__charconv/to_chars.h>
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#include <__charconv/to_chars_base_10.h>
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#include <__charconv/to_chars_floating_point.h>
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#include <__charconv/to_chars_integral.h>
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#include <__charconv/to_chars_result.h>
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#include <__charconv/traits.h>
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#include <__config>
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#include <__debug>
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#include <__system_error/errc.h>
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#include <cmath> // for log2f
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#include <cstdint>
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#include <limits>
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#ifndef _LIBCPP_CXX03_LANG
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enum class _LIBCPP_ENUM_VIS chars_format
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{
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scientific = 0x1,
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fixed = 0x2,
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hex = 0x4,
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general = fixed | scientific
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};
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struct _LIBCPP_TYPE_VIS to_chars_result
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{
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char* ptr;
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errc ec;
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};
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struct _LIBCPP_TYPE_VIS from_chars_result
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{
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const char* ptr;
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errc ec;
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};
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void to_chars(char*, char*, bool, int = 10) = delete;
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void from_chars(const char*, const char*, bool, int = 10) = delete;
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namespace __itoa
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{
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static _LIBCPP_CONSTEXPR uint64_t __pow10_64[] = {
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UINT64_C(0),
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UINT64_C(10),
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UINT64_C(100),
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UINT64_C(1000),
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UINT64_C(10000),
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UINT64_C(100000),
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UINT64_C(1000000),
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UINT64_C(10000000),
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UINT64_C(100000000),
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UINT64_C(1000000000),
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UINT64_C(10000000000),
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UINT64_C(100000000000),
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UINT64_C(1000000000000),
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UINT64_C(10000000000000),
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UINT64_C(100000000000000),
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UINT64_C(1000000000000000),
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UINT64_C(10000000000000000),
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UINT64_C(100000000000000000),
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UINT64_C(1000000000000000000),
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UINT64_C(10000000000000000000),
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};
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static _LIBCPP_CONSTEXPR uint32_t __pow10_32[] = {
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UINT32_C(0), UINT32_C(10), UINT32_C(100),
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UINT32_C(1000), UINT32_C(10000), UINT32_C(100000),
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UINT32_C(1000000), UINT32_C(10000000), UINT32_C(100000000),
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UINT32_C(1000000000),
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};
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template <typename _Tp, typename = void>
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struct _LIBCPP_HIDDEN __traits_base
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{
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using type = uint64_t;
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#if !defined(_LIBCPP_COMPILER_MSVC)
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static _LIBCPP_INLINE_VISIBILITY int __width(_Tp __v)
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{
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auto __t = (64 - __builtin_clzll(__v | 1)) * 1233 >> 12;
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return __t - (__v < __pow10_64[__t]) + 1;
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}
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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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static _LIBCPP_INLINE_VISIBILITY char* __convert(_Tp __v, char* __p)
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{
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return __u64toa(__v, __p);
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}
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static _LIBCPP_INLINE_VISIBILITY decltype(__pow10_64)& __pow() { return __pow10_64; }
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};
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template <typename _Tp>
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struct _LIBCPP_HIDDEN
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__traits_base<_Tp, decltype(void(uint32_t{declval<_Tp>()}))>
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{
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using type = uint32_t;
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#if !defined(_LIBCPP_COMPILER_MSVC)
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static _LIBCPP_INLINE_VISIBILITY int __width(_Tp __v)
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{
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auto __t = (32 - __builtin_clz(__v | 1)) * 1233 >> 12;
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return __t - (__v < __pow10_32[__t]) + 1;
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}
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#endif
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static _LIBCPP_INLINE_VISIBILITY char* __convert(_Tp __v, char* __p)
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{
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return __u32toa(__v, __p);
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}
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static _LIBCPP_INLINE_VISIBILITY decltype(__pow10_32)& __pow() { return __pow10_32; }
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};
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY bool
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__mul_overflowed(unsigned char __a, _Tp __b, unsigned char& __r)
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{
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auto __c = __a * __b;
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__r = __c;
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return __c > (numeric_limits<unsigned char>::max)();
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY bool
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__mul_overflowed(unsigned short __a, _Tp __b, unsigned short& __r)
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{
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auto __c = __a * __b;
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__r = __c;
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return __c > (numeric_limits<unsigned short>::max)();
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY bool
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__mul_overflowed(_Tp __a, _Tp __b, _Tp& __r)
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{
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static_assert(is_unsigned<_Tp>::value, "");
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#if !defined(_LIBCPP_COMPILER_MSVC)
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return __builtin_mul_overflow(__a, __b, &__r);
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#else
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bool __did = __b && ((numeric_limits<_Tp>::max)() / __b) < __a;
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__r = __a * __b;
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return __did;
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#endif
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}
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template <typename _Tp, typename _Up>
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inline _LIBCPP_INLINE_VISIBILITY bool
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__mul_overflowed(_Tp __a, _Up __b, _Tp& __r)
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{
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return __mul_overflowed(__a, static_cast<_Tp>(__b), __r);
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}
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template <typename _Tp>
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struct _LIBCPP_HIDDEN __traits : __traits_base<_Tp>
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{
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static _LIBCPP_CONSTEXPR int digits = numeric_limits<_Tp>::digits10 + 1;
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using __traits_base<_Tp>::__pow;
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using typename __traits_base<_Tp>::type;
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// precondition: at least one non-zero character available
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static _LIBCPP_INLINE_VISIBILITY char const*
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__read(char const* __p, char const* __ep, type& __a, type& __b)
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{
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type __cprod[digits];
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int __j = digits - 1;
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int __i = digits;
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do
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{
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if (!('0' <= *__p && *__p <= '9'))
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break;
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__cprod[--__i] = *__p++ - '0';
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} while (__p != __ep && __i != 0);
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__a = __inner_product(__cprod + __i + 1, __cprod + __j, __pow() + 1,
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__cprod[__i]);
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if (__mul_overflowed(__cprod[__j], __pow()[__j - __i], __b))
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--__p;
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return __p;
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}
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template <typename _It1, typename _It2, class _Up>
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static _LIBCPP_INLINE_VISIBILITY _Up
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__inner_product(_It1 __first1, _It1 __last1, _It2 __first2, _Up __init)
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{
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for (; __first1 < __last1; ++__first1, ++__first2)
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__init = __init + *__first1 * *__first2;
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return __init;
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}
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};
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} // namespace __itoa
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY _Tp
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__complement(_Tp __x)
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{
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static_assert(is_unsigned<_Tp>::value, "cast to unsigned first");
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return _Tp(~__x + 1);
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY typename make_unsigned<_Tp>::type
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__to_unsigned(_Tp __x)
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{
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return static_cast<typename make_unsigned<_Tp>::type>(__x);
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY to_chars_result
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__to_chars_itoa(char* __first, char* __last, _Tp __value, true_type)
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{
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auto __x = __to_unsigned(__value);
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if (__value < 0 && __first != __last)
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{
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*__first++ = '-';
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__x = __complement(__x);
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}
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return __to_chars_itoa(__first, __last, __x, false_type());
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY to_chars_result
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__to_chars_itoa(char* __first, char* __last, _Tp __value, false_type)
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{
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using __tx = __itoa::__traits<_Tp>;
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auto __diff = __last - __first;
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#if !defined(_LIBCPP_COMPILER_MSVC)
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if (__tx::digits <= __diff || __tx::__width(__value) <= __diff)
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return {__tx::__convert(__value, __first), errc(0)};
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else
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return {__last, errc::value_too_large};
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#else
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if (__tx::digits <= __diff)
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return {__tx::__convert(__value, __first), {}};
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else
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{
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char __buf[__tx::digits];
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auto __p = __tx::__convert(__value, __buf);
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auto __len = __p - __buf;
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if (__len <= __diff)
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{
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memcpy(__first, __buf, __len);
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return {__first + __len, {}};
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}
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else
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return {__last, errc::value_too_large};
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}
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#endif
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY to_chars_result
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__to_chars_integral(char* __first, char* __last, _Tp __value, int __base,
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true_type)
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{
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auto __x = __to_unsigned(__value);
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if (__value < 0 && __first != __last)
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{
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*__first++ = '-';
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__x = __complement(__x);
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}
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return __to_chars_integral(__first, __last, __x, __base, false_type());
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY to_chars_result
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__to_chars_integral(char* __first, char* __last, _Tp __value, int __base,
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false_type)
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{
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if (__base == 10)
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return __to_chars_itoa(__first, __last, __value, false_type());
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auto __p = __last;
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while (__p != __first)
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{
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auto __c = __value % __base;
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__value /= __base;
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*--__p = "0123456789abcdefghijklmnopqrstuvwxyz"[__c];
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if (__value == 0)
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break;
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}
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auto __len = __last - __p;
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if (__value != 0 || !__len)
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return {__last, errc::value_too_large};
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else
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{
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memmove(__first, __p, __len);
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return {__first + __len, {}};
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}
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}
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template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
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inline _LIBCPP_INLINE_VISIBILITY to_chars_result
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to_chars(char* __first, char* __last, _Tp __value)
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{
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return __to_chars_itoa(__first, __last, __value, is_signed<_Tp>());
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}
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template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
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inline _LIBCPP_INLINE_VISIBILITY to_chars_result
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to_chars(char* __first, char* __last, _Tp __value, int __base)
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{
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_LIBCPP_ASSERT(2 <= __base && __base <= 36, "base not in [2, 36]");
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return __to_chars_integral(__first, __last, __value, __base,
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is_signed<_Tp>());
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}
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template <typename _It, typename _Tp, typename _Fn, typename... _Ts>
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inline _LIBCPP_INLINE_VISIBILITY from_chars_result
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__sign_combinator(_It __first, _It __last, _Tp& __value, _Fn __f, _Ts... __args)
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{
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using __tl = numeric_limits<_Tp>;
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decltype(__to_unsigned(__value)) __x;
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bool __neg = (__first != __last && *__first == '-');
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auto __r = __f(__neg ? __first + 1 : __first, __last, __x, __args...);
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switch (__r.ec)
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||||
{
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||||
case errc::invalid_argument:
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||||
return {__first, __r.ec};
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||||
case errc::result_out_of_range:
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return __r;
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default:
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break;
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}
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if (__neg)
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||||
{
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if (__x <= __complement(__to_unsigned(__tl::min())))
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{
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__x = __complement(__x);
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memcpy(&__value, &__x, sizeof(__x));
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return __r;
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||||
}
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||||
}
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else
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||||
{
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if (__x <= (__tl::max)())
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{
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__value = __x;
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return __r;
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}
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}
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return {__r.ptr, errc::result_out_of_range};
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}
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY bool
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__in_pattern(_Tp __c)
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{
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return '0' <= __c && __c <= '9';
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}
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||||
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struct _LIBCPP_HIDDEN __in_pattern_result
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||||
{
|
||||
bool __ok;
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||||
int __val;
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||||
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||||
explicit _LIBCPP_INLINE_VISIBILITY operator bool() const { return __ok; }
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};
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template <typename _Tp>
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inline _LIBCPP_INLINE_VISIBILITY __in_pattern_result
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__in_pattern(_Tp __c, int __base)
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||||
{
|
||||
if (__base <= 10)
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||||
return {'0' <= __c && __c < '0' + __base, __c - '0'};
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||||
else if (__in_pattern(__c))
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||||
return {true, __c - '0'};
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else if ('a' <= __c && __c < 'a' + __base - 10)
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||||
return {true, __c - 'a' + 10};
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||||
else
|
||||
return {'A' <= __c && __c < 'A' + __base - 10, __c - 'A' + 10};
|
||||
}
|
||||
|
||||
template <typename _It, typename _Tp, typename _Fn, typename... _Ts>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
__subject_seq_combinator(_It __first, _It __last, _Tp& __value, _Fn __f,
|
||||
_Ts... __args)
|
||||
{
|
||||
auto __find_non_zero = [](_It __first, _It __last) {
|
||||
for (; __first != __last; ++__first)
|
||||
if (*__first != '0')
|
||||
break;
|
||||
return __first;
|
||||
};
|
||||
|
||||
auto __p = __find_non_zero(__first, __last);
|
||||
if (__p == __last || !__in_pattern(*__p, __args...))
|
||||
{
|
||||
if (__p == __first)
|
||||
return {__first, errc::invalid_argument};
|
||||
else
|
||||
{
|
||||
__value = 0;
|
||||
return {__p, {}};
|
||||
}
|
||||
}
|
||||
|
||||
auto __r = __f(__p, __last, __value, __args...);
|
||||
if (__r.ec == errc::result_out_of_range)
|
||||
{
|
||||
for (; __r.ptr != __last; ++__r.ptr)
|
||||
{
|
||||
if (!__in_pattern(*__r.ptr, __args...))
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return __r;
|
||||
}
|
||||
|
||||
template <typename _Tp, typename enable_if<is_unsigned<_Tp>::value, int>::type = 0>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
__from_chars_atoi(const char* __first, const char* __last, _Tp& __value)
|
||||
{
|
||||
using __tx = __itoa::__traits<_Tp>;
|
||||
using __output_type = typename __tx::type;
|
||||
|
||||
return __subject_seq_combinator(
|
||||
__first, __last, __value,
|
||||
[](const char* __first, const char* __last,
|
||||
_Tp& __value) -> from_chars_result {
|
||||
__output_type __a, __b;
|
||||
auto __p = __tx::__read(__first, __last, __a, __b);
|
||||
if (__p == __last || !__in_pattern(*__p))
|
||||
{
|
||||
__output_type __m = (numeric_limits<_Tp>::max)();
|
||||
if (__m >= __a && __m - __a >= __b)
|
||||
{
|
||||
__value = __a + __b;
|
||||
return {__p, {}};
|
||||
}
|
||||
}
|
||||
return {__p, errc::result_out_of_range};
|
||||
});
|
||||
}
|
||||
|
||||
template <typename _Tp, typename enable_if<is_signed<_Tp>::value, int>::type = 0>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
__from_chars_atoi(const char* __first, const char* __last, _Tp& __value)
|
||||
{
|
||||
using __t = decltype(__to_unsigned(__value));
|
||||
return __sign_combinator(__first, __last, __value, __from_chars_atoi<__t>);
|
||||
}
|
||||
|
||||
template <typename _Tp, typename enable_if<is_unsigned<_Tp>::value, int>::type = 0>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
__from_chars_integral(const char* __first, const char* __last, _Tp& __value,
|
||||
int __base)
|
||||
{
|
||||
if (__base == 10)
|
||||
return __from_chars_atoi(__first, __last, __value);
|
||||
|
||||
return __subject_seq_combinator(
|
||||
__first, __last, __value,
|
||||
[](const char* __p, const char* __last, _Tp& __value,
|
||||
int __base) -> from_chars_result {
|
||||
using __tl = numeric_limits<_Tp>;
|
||||
auto __digits = __tl::digits / log2f(float(__base));
|
||||
_Tp __a = __in_pattern(*__p++, __base).__val, __b = 0;
|
||||
|
||||
for (int __i = 1; __p != __last; ++__i, ++__p)
|
||||
{
|
||||
if (auto __c = __in_pattern(*__p, __base))
|
||||
{
|
||||
if (__i < __digits - 1)
|
||||
__a = __a * __base + __c.__val;
|
||||
else
|
||||
{
|
||||
if (!__itoa::__mul_overflowed(__a, __base, __a))
|
||||
++__p;
|
||||
__b = __c.__val;
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
break;
|
||||
}
|
||||
|
||||
if (__p == __last || !__in_pattern(*__p, __base))
|
||||
{
|
||||
if ((__tl::max)() - __a >= __b)
|
||||
{
|
||||
__value = __a + __b;
|
||||
return {__p, {}};
|
||||
}
|
||||
}
|
||||
return {__p, errc::result_out_of_range};
|
||||
},
|
||||
__base);
|
||||
}
|
||||
|
||||
template <typename _Tp, typename enable_if<is_signed<_Tp>::value, int>::type = 0>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
__from_chars_integral(const char* __first, const char* __last, _Tp& __value,
|
||||
int __base)
|
||||
{
|
||||
using __t = decltype(__to_unsigned(__value));
|
||||
return __sign_combinator(__first, __last, __value,
|
||||
__from_chars_integral<__t>, __base);
|
||||
}
|
||||
|
||||
template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
from_chars(const char* __first, const char* __last, _Tp& __value)
|
||||
{
|
||||
return __from_chars_atoi(__first, __last, __value);
|
||||
}
|
||||
|
||||
template <typename _Tp, typename enable_if<is_integral<_Tp>::value, int>::type = 0>
|
||||
inline _LIBCPP_INLINE_VISIBILITY from_chars_result
|
||||
from_chars(const char* __first, const char* __last, _Tp& __value, int __base)
|
||||
{
|
||||
_LIBCPP_ASSERT(2 <= __base && __base <= 36, "base not in [2, 36]");
|
||||
return __from_chars_integral(__first, __last, __value, __base);
|
||||
}
|
||||
|
||||
#endif // _LIBCPP_CXX03_LANG
|
||||
_LIBCPP_BEGIN_NAMESPACE_STD
|
||||
|
||||
_LIBCPP_END_NAMESPACE_STD
|
||||
|
||||
_LIBCPP_POP_MACROS
|
||||
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
|
||||
# include <concepts>
|
||||
# include <cstdlib>
|
||||
# include <cstring>
|
||||
# include <iosfwd>
|
||||
# include <type_traits>
|
||||
#endif
|
||||
|
||||
#endif // _LIBCPP_CHARCONV
|
||||
#endif // _LIBCPP_CHARCONV
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue