975 lines
30 KiB
C++
975 lines
30 KiB
C++
// -*- C++ -*-
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//===-------------------------- __string ----------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___STRING
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#define _LIBCPP___STRING
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/*
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string synopsis
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namespace std
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{
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template <class charT>
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struct char_traits
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{
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typedef charT char_type;
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typedef ... int_type;
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typedef streamoff off_type;
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typedef streampos pos_type;
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typedef mbstate_t state_type;
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static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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static constexpr bool eq(char_type c1, char_type c2) noexcept;
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static constexpr bool lt(char_type c1, char_type c2) noexcept;
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static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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static constexpr size_t length(const char_type* s);
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static constexpr const char_type*
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find(const char_type* s, size_t n, const char_type& a);
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static char_type* move(char_type* s1, const char_type* s2, size_t n);
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static char_type* copy(char_type* s1, const char_type* s2, size_t n);
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static char_type* assign(char_type* s, size_t n, char_type a);
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static constexpr int_type not_eof(int_type c) noexcept;
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static constexpr char_type to_char_type(int_type c) noexcept;
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static constexpr int_type to_int_type(char_type c) noexcept;
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static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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static constexpr int_type eof() noexcept;
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};
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template <> struct char_traits<char>;
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template <> struct char_traits<wchar_t>;
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template <> struct char_traits<char8_t>; // c++20
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} // std
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*/
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#include <__config>
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#include <algorithm> // for search and min
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#include <cstdio> // For EOF.
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#include <memory> // for __murmur2_or_cityhash
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#include <__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 <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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// char_traits
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template <class _CharT>
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struct _LIBCPP_TEMPLATE_VIS char_traits
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{
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typedef _CharT char_type;
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typedef int int_type;
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typedef streamoff off_type;
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typedef streampos pos_type;
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typedef mbstate_t state_type;
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static inline void _LIBCPP_CONSTEXPR_AFTER_CXX14
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assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
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static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
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{return __c1 == __c2;}
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static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
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{return __c1 < __c2;}
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static _LIBCPP_CONSTEXPR_AFTER_CXX14
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int compare(const char_type* __s1, const char_type* __s2, size_t __n);
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_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
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size_t length(const char_type* __s);
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_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
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const char_type* find(const char_type* __s, size_t __n, const char_type& __a);
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static char_type* move(char_type* __s1, const char_type* __s2, size_t __n);
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_LIBCPP_INLINE_VISIBILITY
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static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n);
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_LIBCPP_INLINE_VISIBILITY
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static char_type* assign(char_type* __s, size_t __n, char_type __a);
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static inline _LIBCPP_CONSTEXPR int_type not_eof(int_type __c) _NOEXCEPT
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{return eq_int_type(__c, eof()) ? ~eof() : __c;}
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static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
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{return char_type(__c);}
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static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
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{return int_type(__c);}
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static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
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{return __c1 == __c2;}
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static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
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{return int_type(EOF);}
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};
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template <class _CharT>
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_LIBCPP_CONSTEXPR_AFTER_CXX14 int
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char_traits<_CharT>::compare(const char_type* __s1, const char_type* __s2, size_t __n)
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{
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for (; __n; --__n, ++__s1, ++__s2)
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{
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if (lt(*__s1, *__s2))
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return -1;
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if (lt(*__s2, *__s1))
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return 1;
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}
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return 0;
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}
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template <class _CharT>
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inline
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_LIBCPP_CONSTEXPR_AFTER_CXX14 size_t
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char_traits<_CharT>::length(const char_type* __s)
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{
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size_t __len = 0;
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for (; !eq(*__s, char_type(0)); ++__s)
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++__len;
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return __len;
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}
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template <class _CharT>
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inline
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_LIBCPP_CONSTEXPR_AFTER_CXX14 const _CharT*
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char_traits<_CharT>::find(const char_type* __s, size_t __n, const char_type& __a)
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{
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for (; __n; --__n)
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{
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if (eq(*__s, __a))
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return __s;
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++__s;
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}
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return 0;
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}
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template <class _CharT>
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_CharT*
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char_traits<_CharT>::move(char_type* __s1, const char_type* __s2, size_t __n)
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{
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char_type* __r = __s1;
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if (__s1 < __s2)
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{
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for (; __n; --__n, ++__s1, ++__s2)
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assign(*__s1, *__s2);
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}
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else if (__s2 < __s1)
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{
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__s1 += __n;
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__s2 += __n;
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for (; __n; --__n)
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assign(*--__s1, *--__s2);
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}
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return __r;
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}
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template <class _CharT>
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inline
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_CharT*
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char_traits<_CharT>::copy(char_type* __s1, const char_type* __s2, size_t __n)
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{
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_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
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char_type* __r = __s1;
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for (; __n; --__n, ++__s1, ++__s2)
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assign(*__s1, *__s2);
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return __r;
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}
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template <class _CharT>
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inline
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_CharT*
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char_traits<_CharT>::assign(char_type* __s, size_t __n, char_type __a)
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{
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char_type* __r = __s;
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for (; __n; --__n, ++__s)
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assign(*__s, __a);
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return __r;
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}
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// char_traits<char>
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template <>
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struct _LIBCPP_TEMPLATE_VIS char_traits<char>
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{
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typedef char char_type;
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typedef int int_type;
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typedef streamoff off_type;
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typedef streampos pos_type;
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typedef mbstate_t state_type;
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static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
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static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
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{return __c1 == __c2;}
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static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
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{return (unsigned char)__c1 < (unsigned char)__c2;}
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static _LIBCPP_CONSTEXPR_AFTER_CXX14
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int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
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static inline size_t _LIBCPP_CONSTEXPR_AFTER_CXX14
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length(const char_type* __s) _NOEXCEPT {return __builtin_strlen(__s);}
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static _LIBCPP_CONSTEXPR_AFTER_CXX14
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const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
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static inline char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{return __n == 0 ? __s1 : (char_type*) memmove(__s1, __s2, __n);}
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static inline char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{
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_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
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return __n == 0 ? __s1 : (char_type*)memcpy(__s1, __s2, __n);
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}
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static inline char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
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{return __n == 0 ? __s : (char_type*)memset(__s, to_int_type(__a), __n);}
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static inline _LIBCPP_CONSTEXPR int_type not_eof(int_type __c) _NOEXCEPT
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{return eq_int_type(__c, eof()) ? ~eof() : __c;}
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static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
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{return char_type(__c);}
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static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
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{return int_type((unsigned char)__c);}
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static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
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{return __c1 == __c2;}
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static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
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{return int_type(EOF);}
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};
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inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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int
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char_traits<char>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{
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if (__n == 0)
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return 0;
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#if __has_feature(cxx_constexpr_string_builtins)
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return __builtin_memcmp(__s1, __s2, __n);
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#elif _LIBCPP_STD_VER <= 14
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return memcmp(__s1, __s2, __n);
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#else
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for (; __n; --__n, ++__s1, ++__s2)
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{
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if (lt(*__s1, *__s2))
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return -1;
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if (lt(*__s2, *__s1))
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return 1;
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}
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return 0;
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#endif
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}
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inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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const char*
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char_traits<char>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
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{
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if (__n == 0)
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return nullptr;
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#if __has_feature(cxx_constexpr_string_builtins)
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return __builtin_char_memchr(__s, to_int_type(__a), __n);
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#elif _LIBCPP_STD_VER <= 14
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return (const char_type*) memchr(__s, to_int_type(__a), __n);
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#else
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for (; __n; --__n)
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{
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if (eq(*__s, __a))
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return __s;
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++__s;
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}
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return nullptr;
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#endif
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}
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// char_traits<wchar_t>
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template <>
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struct _LIBCPP_TEMPLATE_VIS char_traits<wchar_t>
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{
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typedef wchar_t char_type;
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typedef wint_t int_type;
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typedef streamoff off_type;
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typedef streampos pos_type;
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typedef mbstate_t state_type;
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static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
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static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
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{return __c1 == __c2;}
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static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
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{return __c1 < __c2;}
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static _LIBCPP_CONSTEXPR_AFTER_CXX14
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int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
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static _LIBCPP_CONSTEXPR_AFTER_CXX14
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size_t length(const char_type* __s) _NOEXCEPT;
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static _LIBCPP_CONSTEXPR_AFTER_CXX14
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const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
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static inline char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{return __n == 0 ? __s1 : (char_type*)wmemmove(__s1, __s2, __n);}
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static inline char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{
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_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
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return __n == 0 ? __s1 : (char_type*)wmemcpy(__s1, __s2, __n);
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}
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static inline char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
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{return __n == 0 ? __s : (char_type*)wmemset(__s, __a, __n);}
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static inline _LIBCPP_CONSTEXPR int_type not_eof(int_type __c) _NOEXCEPT
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{return eq_int_type(__c, eof()) ? ~eof() : __c;}
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static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
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{return char_type(__c);}
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static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
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{return int_type(__c);}
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static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
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{return __c1 == __c2;}
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static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
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{return int_type(WEOF);}
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};
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inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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int
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char_traits<wchar_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{
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if (__n == 0)
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return 0;
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#if __has_feature(cxx_constexpr_string_builtins)
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return __builtin_wmemcmp(__s1, __s2, __n);
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#elif _LIBCPP_STD_VER <= 14
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return wmemcmp(__s1, __s2, __n);
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#else
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for (; __n; --__n, ++__s1, ++__s2)
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{
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if (lt(*__s1, *__s2))
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return -1;
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if (lt(*__s2, *__s1))
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return 1;
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}
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return 0;
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#endif
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}
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inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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size_t
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char_traits<wchar_t>::length(const char_type* __s) _NOEXCEPT
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{
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#if __has_feature(cxx_constexpr_string_builtins)
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return __builtin_wcslen(__s);
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#elif _LIBCPP_STD_VER <= 14
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return wcslen(__s);
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#else
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size_t __len = 0;
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for (; !eq(*__s, char_type(0)); ++__s)
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++__len;
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return __len;
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#endif
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}
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inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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const wchar_t*
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char_traits<wchar_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
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{
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|
if (__n == 0)
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return nullptr;
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|
#if __has_feature(cxx_constexpr_string_builtins)
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return __builtin_wmemchr(__s, __a, __n);
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#elif _LIBCPP_STD_VER <= 14
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return wmemchr(__s, __a, __n);
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#else
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for (; __n; --__n)
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{
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if (eq(*__s, __a))
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return __s;
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++__s;
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}
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return nullptr;
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#endif
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}
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|
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#ifndef _LIBCPP_NO_HAS_CHAR8_T
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template <>
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struct _LIBCPP_TEMPLATE_VIS char_traits<char8_t>
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{
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typedef char8_t char_type;
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typedef unsigned int int_type;
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typedef streamoff off_type;
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typedef u8streampos pos_type;
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typedef mbstate_t state_type;
|
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|
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static inline constexpr void assign(char_type& __c1, const char_type& __c2) noexcept
|
|
{__c1 = __c2;}
|
|
static inline constexpr bool eq(char_type __c1, char_type __c2) noexcept
|
|
{return __c1 == __c2;}
|
|
static inline constexpr bool lt(char_type __c1, char_type __c2) noexcept
|
|
{return __c1 < __c2;}
|
|
|
|
static constexpr
|
|
int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
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|
|
static constexpr
|
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size_t length(const char_type* __s) _NOEXCEPT;
|
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|
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_LIBCPP_INLINE_VISIBILITY static constexpr
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const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
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static char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{return __n == 0 ? __s1 : (char_type*) memmove(__s1, __s2, __n);}
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|
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static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
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{
|
|
_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
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|
return __n == 0 ? __s1 : (char_type*)memcpy(__s1, __s2, __n);
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}
|
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|
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static char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
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|
{return __n == 0 ? __s : (char_type*)memset(__s, to_int_type(__a), __n);}
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|
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static inline constexpr int_type not_eof(int_type __c) noexcept
|
|
{return eq_int_type(__c, eof()) ? ~eof() : __c;}
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static inline constexpr char_type to_char_type(int_type __c) noexcept
|
|
{return char_type(__c);}
|
|
static inline constexpr int_type to_int_type(char_type __c) noexcept
|
|
{return int_type(__c);}
|
|
static inline constexpr bool eq_int_type(int_type __c1, int_type __c2) noexcept
|
|
{return __c1 == __c2;}
|
|
static inline constexpr int_type eof() noexcept
|
|
{return int_type(EOF);}
|
|
};
|
|
|
|
// TODO use '__builtin_strlen' if it ever supports char8_t ??
|
|
inline constexpr
|
|
size_t
|
|
char_traits<char8_t>::length(const char_type* __s) _NOEXCEPT
|
|
{
|
|
size_t __len = 0;
|
|
for (; !eq(*__s, char_type(0)); ++__s)
|
|
++__len;
|
|
return __len;
|
|
}
|
|
|
|
inline constexpr
|
|
int
|
|
char_traits<char8_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
#if __has_feature(cxx_constexpr_string_builtins)
|
|
return __builtin_memcmp(__s1, __s2, __n);
|
|
#else
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
{
|
|
if (lt(*__s1, *__s2))
|
|
return -1;
|
|
if (lt(*__s2, *__s1))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
// TODO use '__builtin_char_memchr' if it ever supports char8_t ??
|
|
inline constexpr
|
|
const char8_t*
|
|
char_traits<char8_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
|
|
{
|
|
for (; __n; --__n)
|
|
{
|
|
if (eq(*__s, __a))
|
|
return __s;
|
|
++__s;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#endif // #_LIBCPP_NO_HAS_CHAR8_T
|
|
|
|
#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
|
|
|
|
template <>
|
|
struct _LIBCPP_TEMPLATE_VIS char_traits<char16_t>
|
|
{
|
|
typedef char16_t char_type;
|
|
typedef uint_least16_t int_type;
|
|
typedef streamoff off_type;
|
|
typedef u16streampos pos_type;
|
|
typedef mbstate_t state_type;
|
|
|
|
static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
|
|
static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
|
|
{return __c1 == __c2;}
|
|
static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
|
|
{return __c1 < __c2;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
size_t length(const char_type* __s) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT;
|
|
|
|
static inline _LIBCPP_CONSTEXPR int_type not_eof(int_type __c) _NOEXCEPT
|
|
{return eq_int_type(__c, eof()) ? ~eof() : __c;}
|
|
static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
|
|
{return char_type(__c);}
|
|
static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
|
|
{return int_type(__c);}
|
|
static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
|
|
{return __c1 == __c2;}
|
|
static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
|
|
{return int_type(0xFFFF);}
|
|
};
|
|
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
int
|
|
char_traits<char16_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
{
|
|
if (lt(*__s1, *__s2))
|
|
return -1;
|
|
if (lt(*__s2, *__s1))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
size_t
|
|
char_traits<char16_t>::length(const char_type* __s) _NOEXCEPT
|
|
{
|
|
size_t __len = 0;
|
|
for (; !eq(*__s, char_type(0)); ++__s)
|
|
++__len;
|
|
return __len;
|
|
}
|
|
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
const char16_t*
|
|
char_traits<char16_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
|
|
{
|
|
for (; __n; --__n)
|
|
{
|
|
if (eq(*__s, __a))
|
|
return __s;
|
|
++__s;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
inline
|
|
char16_t*
|
|
char_traits<char16_t>::move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
char_type* __r = __s1;
|
|
if (__s1 < __s2)
|
|
{
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
assign(*__s1, *__s2);
|
|
}
|
|
else if (__s2 < __s1)
|
|
{
|
|
__s1 += __n;
|
|
__s2 += __n;
|
|
for (; __n; --__n)
|
|
assign(*--__s1, *--__s2);
|
|
}
|
|
return __r;
|
|
}
|
|
|
|
inline
|
|
char16_t*
|
|
char_traits<char16_t>::copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
|
|
char_type* __r = __s1;
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
assign(*__s1, *__s2);
|
|
return __r;
|
|
}
|
|
|
|
inline
|
|
char16_t*
|
|
char_traits<char16_t>::assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
|
|
{
|
|
char_type* __r = __s;
|
|
for (; __n; --__n, ++__s)
|
|
assign(*__s, __a);
|
|
return __r;
|
|
}
|
|
|
|
template <>
|
|
struct _LIBCPP_TEMPLATE_VIS char_traits<char32_t>
|
|
{
|
|
typedef char32_t char_type;
|
|
typedef uint_least32_t int_type;
|
|
typedef streamoff off_type;
|
|
typedef u32streampos pos_type;
|
|
typedef mbstate_t state_type;
|
|
|
|
static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
|
|
static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
|
|
{return __c1 == __c2;}
|
|
static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
|
|
{return __c1 < __c2;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
size_t length(const char_type* __s) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
static char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT;
|
|
|
|
static inline _LIBCPP_CONSTEXPR int_type not_eof(int_type __c) _NOEXCEPT
|
|
{return eq_int_type(__c, eof()) ? ~eof() : __c;}
|
|
static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
|
|
{return char_type(__c);}
|
|
static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
|
|
{return int_type(__c);}
|
|
static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
|
|
{return __c1 == __c2;}
|
|
static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
|
|
{return int_type(0xFFFFFFFF);}
|
|
};
|
|
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
int
|
|
char_traits<char32_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
{
|
|
if (lt(*__s1, *__s2))
|
|
return -1;
|
|
if (lt(*__s2, *__s1))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
size_t
|
|
char_traits<char32_t>::length(const char_type* __s) _NOEXCEPT
|
|
{
|
|
size_t __len = 0;
|
|
for (; !eq(*__s, char_type(0)); ++__s)
|
|
++__len;
|
|
return __len;
|
|
}
|
|
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
const char32_t*
|
|
char_traits<char32_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
|
|
{
|
|
for (; __n; --__n)
|
|
{
|
|
if (eq(*__s, __a))
|
|
return __s;
|
|
++__s;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
inline
|
|
char32_t*
|
|
char_traits<char32_t>::move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
char_type* __r = __s1;
|
|
if (__s1 < __s2)
|
|
{
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
assign(*__s1, *__s2);
|
|
}
|
|
else if (__s2 < __s1)
|
|
{
|
|
__s1 += __n;
|
|
__s2 += __n;
|
|
for (; __n; --__n)
|
|
assign(*--__s1, *--__s2);
|
|
}
|
|
return __r;
|
|
}
|
|
|
|
inline
|
|
char32_t*
|
|
char_traits<char32_t>::copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
|
|
{
|
|
_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
|
|
char_type* __r = __s1;
|
|
for (; __n; --__n, ++__s1, ++__s2)
|
|
assign(*__s1, *__s2);
|
|
return __r;
|
|
}
|
|
|
|
inline
|
|
char32_t*
|
|
char_traits<char32_t>::assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
|
|
{
|
|
char_type* __r = __s;
|
|
for (; __n; --__n, ++__s)
|
|
assign(*__s, __a);
|
|
return __r;
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
|
|
|
|
// helper fns for basic_string and string_view
|
|
|
|
// __str_find
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find(const _CharT *__p, _SizeT __sz,
|
|
_CharT __c, _SizeT __pos) _NOEXCEPT
|
|
{
|
|
if (__pos >= __sz)
|
|
return __npos;
|
|
const _CharT* __r = _Traits::find(__p + __pos, __sz - __pos, __c);
|
|
if (__r == 0)
|
|
return __npos;
|
|
return static_cast<_SizeT>(__r - __p);
|
|
}
|
|
|
|
template <class _CharT, class _Traits>
|
|
inline _LIBCPP_CONSTEXPR_AFTER_CXX11 const _CharT *
|
|
__search_substring(const _CharT *__first1, const _CharT *__last1,
|
|
const _CharT *__first2, const _CharT *__last2) {
|
|
// Take advantage of knowing source and pattern lengths.
|
|
// Stop short when source is smaller than pattern.
|
|
const ptrdiff_t __len2 = __last2 - __first2;
|
|
if (__len2 == 0)
|
|
return __first1;
|
|
|
|
ptrdiff_t __len1 = __last1 - __first1;
|
|
if (__len1 < __len2)
|
|
return __last1;
|
|
|
|
// First element of __first2 is loop invariant.
|
|
_CharT __f2 = *__first2;
|
|
while (true) {
|
|
__len1 = __last1 - __first1;
|
|
// Check whether __first1 still has at least __len2 bytes.
|
|
if (__len1 < __len2)
|
|
return __last1;
|
|
|
|
// Find __f2 the first byte matching in __first1.
|
|
__first1 = _Traits::find(__first1, __len1 - __len2 + 1, __f2);
|
|
if (__first1 == 0)
|
|
return __last1;
|
|
|
|
// It is faster to compare from the first byte of __first1 even if we
|
|
// already know that it matches the first byte of __first2: this is because
|
|
// __first2 is most likely aligned, as it is user's "pattern" string, and
|
|
// __first1 + 1 is most likely not aligned, as the match is in the middle of
|
|
// the string.
|
|
if (_Traits::compare(__first1, __first2, __len2) == 0)
|
|
return __first1;
|
|
|
|
++__first1;
|
|
}
|
|
}
|
|
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find(const _CharT *__p, _SizeT __sz,
|
|
const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
|
|
{
|
|
if (__pos > __sz)
|
|
return __npos;
|
|
|
|
if (__n == 0) // There is nothing to search, just return __pos.
|
|
return __pos;
|
|
|
|
const _CharT *__r = __search_substring<_CharT, _Traits>(
|
|
__p + __pos, __p + __sz, __s, __s + __n);
|
|
|
|
if (__r == __p + __sz)
|
|
return __npos;
|
|
return static_cast<_SizeT>(__r - __p);
|
|
}
|
|
|
|
|
|
// __str_rfind
|
|
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_rfind(const _CharT *__p, _SizeT __sz,
|
|
_CharT __c, _SizeT __pos) _NOEXCEPT
|
|
{
|
|
if (__sz < 1)
|
|
return __npos;
|
|
if (__pos < __sz)
|
|
++__pos;
|
|
else
|
|
__pos = __sz;
|
|
for (const _CharT* __ps = __p + __pos; __ps != __p;)
|
|
{
|
|
if (_Traits::eq(*--__ps, __c))
|
|
return static_cast<_SizeT>(__ps - __p);
|
|
}
|
|
return __npos;
|
|
}
|
|
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_rfind(const _CharT *__p, _SizeT __sz,
|
|
const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
|
|
{
|
|
__pos = _VSTD::min(__pos, __sz);
|
|
if (__n < __sz - __pos)
|
|
__pos += __n;
|
|
else
|
|
__pos = __sz;
|
|
const _CharT* __r = _VSTD::__find_end(
|
|
__p, __p + __pos, __s, __s + __n, _Traits::eq,
|
|
random_access_iterator_tag(), random_access_iterator_tag());
|
|
if (__n > 0 && __r == __p + __pos)
|
|
return __npos;
|
|
return static_cast<_SizeT>(__r - __p);
|
|
}
|
|
|
|
// __str_find_first_of
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find_first_of(const _CharT *__p, _SizeT __sz,
|
|
const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
|
|
{
|
|
if (__pos >= __sz || __n == 0)
|
|
return __npos;
|
|
const _CharT* __r = _VSTD::__find_first_of_ce
|
|
(__p + __pos, __p + __sz, __s, __s + __n, _Traits::eq );
|
|
if (__r == __p + __sz)
|
|
return __npos;
|
|
return static_cast<_SizeT>(__r - __p);
|
|
}
|
|
|
|
|
|
// __str_find_last_of
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find_last_of(const _CharT *__p, _SizeT __sz,
|
|
const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
|
|
{
|
|
if (__n != 0)
|
|
{
|
|
if (__pos < __sz)
|
|
++__pos;
|
|
else
|
|
__pos = __sz;
|
|
for (const _CharT* __ps = __p + __pos; __ps != __p;)
|
|
{
|
|
const _CharT* __r = _Traits::find(__s, __n, *--__ps);
|
|
if (__r)
|
|
return static_cast<_SizeT>(__ps - __p);
|
|
}
|
|
}
|
|
return __npos;
|
|
}
|
|
|
|
|
|
// __str_find_first_not_of
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find_first_not_of(const _CharT *__p, _SizeT __sz,
|
|
const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
|
|
{
|
|
if (__pos < __sz)
|
|
{
|
|
const _CharT* __pe = __p + __sz;
|
|
for (const _CharT* __ps = __p + __pos; __ps != __pe; ++__ps)
|
|
if (_Traits::find(__s, __n, *__ps) == 0)
|
|
return static_cast<_SizeT>(__ps - __p);
|
|
}
|
|
return __npos;
|
|
}
|
|
|
|
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find_first_not_of(const _CharT *__p, _SizeT __sz,
|
|
_CharT __c, _SizeT __pos) _NOEXCEPT
|
|
{
|
|
if (__pos < __sz)
|
|
{
|
|
const _CharT* __pe = __p + __sz;
|
|
for (const _CharT* __ps = __p + __pos; __ps != __pe; ++__ps)
|
|
if (!_Traits::eq(*__ps, __c))
|
|
return static_cast<_SizeT>(__ps - __p);
|
|
}
|
|
return __npos;
|
|
}
|
|
|
|
|
|
// __str_find_last_not_of
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find_last_not_of(const _CharT *__p, _SizeT __sz,
|
|
const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
|
|
{
|
|
if (__pos < __sz)
|
|
++__pos;
|
|
else
|
|
__pos = __sz;
|
|
for (const _CharT* __ps = __p + __pos; __ps != __p;)
|
|
if (_Traits::find(__s, __n, *--__ps) == 0)
|
|
return static_cast<_SizeT>(__ps - __p);
|
|
return __npos;
|
|
}
|
|
|
|
|
|
template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
|
|
inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
|
|
__str_find_last_not_of(const _CharT *__p, _SizeT __sz,
|
|
_CharT __c, _SizeT __pos) _NOEXCEPT
|
|
{
|
|
if (__pos < __sz)
|
|
++__pos;
|
|
else
|
|
__pos = __sz;
|
|
for (const _CharT* __ps = __p + __pos; __ps != __p;)
|
|
if (!_Traits::eq(*--__ps, __c))
|
|
return static_cast<_SizeT>(__ps - __p);
|
|
return __npos;
|
|
}
|
|
|
|
template<class _Ptr>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
size_t __do_string_hash(_Ptr __p, _Ptr __e)
|
|
{
|
|
typedef typename iterator_traits<_Ptr>::value_type value_type;
|
|
return __murmur2_or_cityhash<size_t>()(__p, (__e-__p)*sizeof(value_type));
|
|
}
|
|
|
|
template <class _CharT, class _Iter, class _Traits=char_traits<_CharT> >
|
|
struct __quoted_output_proxy
|
|
{
|
|
_Iter __first;
|
|
_Iter __last;
|
|
_CharT __delim;
|
|
_CharT __escape;
|
|
|
|
__quoted_output_proxy(_Iter __f, _Iter __l, _CharT __d, _CharT __e)
|
|
: __first(__f), __last(__l), __delim(__d), __escape(__e) {}
|
|
// This would be a nice place for a string_ref
|
|
};
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___STRING
|