mirrors/llvm-project
0
0
Fork 0
mirror of https://github.com/llvm/llvm-project.git synced 2025-05-02 17:46:06 +00:00
Code Issues Projects Releases Wiki Activity
llvm-project/libcxx/include/__string
Louis Dionne 368faacac7 [libc++] Revert "Protect users from relying on detail headers" & related changes 
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9,
which were related to the original commit). As landed, 5aaefa51 had
unintended consequences on some downstream bots and didn't have proper
coverage upstream due to a few subtle things. Implementing this is
something we should do in libc++, however we'll first need to address
a few issues listed in https://reviews.llvm.org/D106124#3349710.

Differential Revision: https://reviews.llvm.org/D120683
2022-03-01 08:20:24 -05:00

1176 lines
46 KiB
C++
Raw Blame History

// -*- 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___STRING
#define _LIBCPP___STRING
#include <__algorithm/copy.h>
#include <__algorithm/copy_backward.h>
#include <__algorithm/copy_n.h>
#include <__algorithm/fill_n.h>
#include <__algorithm/find_end.h>
#include <__algorithm/find_first_of.h>
#include <__algorithm/min.h>
#include <__assert>
#include <__config>
#include <__debug>
#include <__functional/hash.h> // for __murmur2_or_cityhash
#include <__iterator/iterator_traits.h>
#include <cstdint> // for uint_least16_t
#include <cstdio> // for EOF
#include <cstring> // for memcpy
#include <iosfwd> // for streampos & friends
#include <type_traits> // for __libcpp_is_constant_evaluated
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
# include <cwchar> // for wmemcpy
#endif
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
// The extern template ABI lists are kept outside of <string> to improve the
// readability of that header. We maintain 2 ABI lists:
// - _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST
// - _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST
// As the name implies, the ABI lists define the V1 (Stable) and unstable ABI.
//
// For unstable, we may explicitly remove function that are external in V1,
// and add (new) external functions to better control inlining and compiler
// optimization opportunities.
//
// For stable, the ABI list should rarely change, except for adding new
// functions supporting new c++ version / API changes. Typically entries
// must never be removed from the stable list.
#define _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_Func, _CharType) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::rfind(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init(value_type const*, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::basic_string(basic_string const&)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::basic_string(basic_string const&, allocator<_CharType> const&)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_last_not_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::~basic_string()) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_first_not_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::operator=(value_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS const _CharType& basic_string<_CharType>::at(size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_first_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::assign(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::reserve(size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::assign(basic_string const&, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::copy(value_type*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::basic_string(basic_string const&, size_type, size_type, allocator<_CharType> const&)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find(value_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_last_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__grow_by(size_type, size_type, size_type, size_type, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__grow_by_and_replace(size_type, size_type, size_type, size_type, size_type, size_type, value_type const*)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::push_back(value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::rfind(value_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS const basic_string<_CharType>::size_type basic_string<_CharType>::npos) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::assign(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::erase(size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(basic_string const&, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(value_type const*) const) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(size_type, size_type, value_type const*) const) \
_Func(_LIBCPP_FUNC_VIS _CharType& basic_string<_CharType>::at(size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::assign(value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(size_type, size_type, basic_string const&, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(size_type, size_type, value_type const*, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::operator=(basic_string const&)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, basic_string const&, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::iterator basic_string<_CharType>::insert(basic_string::const_iterator, value_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::resize(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, basic_string const&, size_type, size_type))
#define _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_Func, _CharType) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::rfind(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init(value_type const*, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_last_not_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::~basic_string()) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_first_not_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::operator=(value_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init_copy_ctor_external(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS const _CharType& basic_string<_CharType>::at(size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_first_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::__assign_external(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::__assign_external(value_type const*)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::reserve(size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::assign(basic_string const&, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::copy(value_type*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::basic_string(basic_string const&, size_type, size_type, allocator<_CharType> const&)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find(value_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__init(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find_last_of(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__grow_by(size_type, size_type, size_type, size_type, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__grow_by_and_replace(size_type, size_type, size_type, size_type, size_type, size_type, value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::__assign_no_alias<false>(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::__assign_no_alias<true>(value_type const*, size_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::push_back(value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::rfind(value_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS const basic_string<_CharType>::size_type basic_string<_CharType>::npos) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::assign(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::__erase_external_with_move(size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(basic_string const&, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(value_type const*) const) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(size_type, size_type, value_type const*) const) \
_Func(_LIBCPP_FUNC_VIS _CharType& basic_string<_CharType>::at(size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::size_type basic_string<_CharType>::find(value_type const*, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(size_type, size_type, basic_string const&, size_type, size_type) const) \
_Func(_LIBCPP_FUNC_VIS int basic_string<_CharType>::compare(size_type, size_type, value_type const*, size_type) const) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::append(value_type const*)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::replace(size_type, size_type, basic_string const&, size_type, size_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>::iterator basic_string<_CharType>::insert(basic_string::const_iterator, value_type)) \
_Func(_LIBCPP_FUNC_VIS void basic_string<_CharType>::resize(size_type, value_type)) \
_Func(_LIBCPP_FUNC_VIS basic_string<_CharType>& basic_string<_CharType>::insert(size_type, basic_string const&, size_type, size_type))
// char_traits
template <class _CharT>
struct _LIBCPP_TEMPLATE_VIS char_traits
{
typedef _CharT char_type;
typedef int int_type;
typedef streamoff off_type;
typedef streampos pos_type;
typedef mbstate_t state_type;
static inline void _LIBCPP_CONSTEXPR_AFTER_CXX14
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;}
static _LIBCPP_CONSTEXPR_AFTER_CXX14
int compare(const char_type* __s1, const char_type* __s2, size_t __n);
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
size_t length(const char_type* __s);
_LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
const char_type* find(const char_type* __s, size_t __n, const char_type& __a);
static _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* move(char_type* __s1, const char_type* __s2, size_t __n);
_LIBCPP_INLINE_VISIBILITY
static _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* copy(char_type* __s1, const char_type* __s2, size_t __n);
_LIBCPP_INLINE_VISIBILITY
static _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* assign(char_type* __s, size_t __n, char_type __a);
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(EOF);}
};
template <class _CharT>
_LIBCPP_CONSTEXPR_AFTER_CXX14 int
char_traits<_CharT>::compare(const char_type* __s1, const char_type* __s2, size_t __n)
{
for (; __n; --__n, ++__s1, ++__s2)
{
if (lt(*__s1, *__s2))
return -1;
if (lt(*__s2, *__s1))
return 1;
}
return 0;
}
template <class _CharT>
inline
_LIBCPP_CONSTEXPR_AFTER_CXX14 size_t
char_traits<_CharT>::length(const char_type* __s)
{
size_t __len = 0;
for (; !eq(*__s, char_type(0)); ++__s)
++__len;
return __len;
}
template <class _CharT>
inline
_LIBCPP_CONSTEXPR_AFTER_CXX14 const _CharT*
char_traits<_CharT>::find(const char_type* __s, size_t __n, const char_type& __a)
{
for (; __n; --__n)
{
if (eq(*__s, __a))
return __s;
++__s;
}
return nullptr;
}
template <class _CharT>
_LIBCPP_CONSTEXPR_AFTER_CXX17 _CharT*
char_traits<_CharT>::move(char_type* __s1, const char_type* __s2, size_t __n)
{
if (__n == 0) return __s1;
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;
}
template <class _CharT>
inline _LIBCPP_CONSTEXPR_AFTER_CXX17
_CharT*
char_traits<_CharT>::copy(char_type* __s1, const char_type* __s2, size_t __n)
{
if (!__libcpp_is_constant_evaluated()) {
_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;
}
template <class _CharT>
inline _LIBCPP_CONSTEXPR_AFTER_CXX17
_CharT*
char_traits<_CharT>::assign(char_type* __s, size_t __n, char_type __a)
{
char_type* __r = __s;
for (; __n; --__n, ++__s)
assign(*__s, __a);
return __r;
}
// constexpr versions of move/copy/assign.
template <class _CharT>
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
_CharT* __copy_constexpr(_CharT* __dest, const _CharT* __source, size_t __n) _NOEXCEPT
{
_LIBCPP_ASSERT(__libcpp_is_constant_evaluated(), "__copy_constexpr() should always be constant evaluated");
_VSTD::copy_n(__source, __n, __dest);
return __dest;
}
template <class _CharT>
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
_CharT* __move_constexpr(_CharT* __dest, const _CharT* __source, size_t __n) _NOEXCEPT
{
_LIBCPP_ASSERT(__libcpp_is_constant_evaluated(), "__move_constexpr() should always be constant evaluated");
if (__n == 0)
return __dest;
_CharT* __allocation = new _CharT[__n];
_VSTD::__copy_constexpr(__allocation, __source, __n);
_VSTD::__copy_constexpr(__dest, static_cast<const _CharT*>(__allocation), __n);
delete[] __allocation;
return __dest;
}
template <class _CharT>
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
_CharT* __assign_constexpr(_CharT* __s, size_t __n, _CharT __a) _NOEXCEPT
{
_LIBCPP_ASSERT(__libcpp_is_constant_evaluated(), "__assign_constexpr() should always be constant evaluated");
_VSTD::fill_n(__s, __n, __a);
return __s;
}
// char_traits<char>
template <>
struct _LIBCPP_TEMPLATE_VIS char_traits<char>
{
typedef char char_type;
typedef int int_type;
typedef streamoff off_type;
typedef streampos 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 (unsigned char)__c1 < (unsigned char)__c2;}
static _LIBCPP_CONSTEXPR_AFTER_CXX14
int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
static inline size_t _LIBCPP_CONSTEXPR_AFTER_CXX14 length(const char_type* __s) _NOEXCEPT {
// GCC currently does not support __builtin_strlen during constant evaluation.
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70816
#ifdef _LIBCPP_COMPILER_GCC
if (__libcpp_is_constant_evaluated()) {
size_t __i = 0;
for (; __s[__i] != char_type('\0'); ++__i)
;
return __i;
}
#endif
return __builtin_strlen(__s);
}
static _LIBCPP_CONSTEXPR_AFTER_CXX14
const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
return __libcpp_is_constant_evaluated()
? _VSTD::__move_constexpr(__s1, __s2, __n)
: __n == 0 ? __s1 : (char_type*)_VSTD::memmove(__s1, __s2, __n);
}
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (!__libcpp_is_constant_evaluated()) {
_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
}
return __libcpp_is_constant_evaluated()
? _VSTD::__copy_constexpr(__s1, __s2, __n)
: __n == 0 ? __s1 : (char_type*)_VSTD::memcpy(__s1, __s2, __n);
}
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
{
return __libcpp_is_constant_evaluated()
? _VSTD::__assign_constexpr(__s, __n, __a)
: __n == 0 ? __s : (char_type*)_VSTD::memset(__s, to_int_type(__a), __n);
}
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((unsigned char)__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(EOF);}
};
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
int
char_traits<char>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (__n == 0)
return 0;
#if __has_feature(cxx_constexpr_string_builtins)
return __builtin_memcmp(__s1, __s2, __n);
#elif _LIBCPP_STD_VER <= 14
return _VSTD::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
}
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
const char*
char_traits<char>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
{
if (__n == 0)
return nullptr;
#if __has_feature(cxx_constexpr_string_builtins)
return __builtin_char_memchr(__s, to_int_type(__a), __n);
#elif _LIBCPP_STD_VER <= 14
return (const char_type*) _VSTD::memchr(__s, to_int_type(__a), __n);
#else
for (; __n; --__n)
{
if (eq(*__s, __a))
return __s;
++__s;
}
return nullptr;
#endif
}
// char_traits<wchar_t>
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
template <>
struct _LIBCPP_TEMPLATE_VIS char_traits<wchar_t>
{
typedef wchar_t char_type;
typedef wint_t int_type;
typedef streamoff off_type;
typedef streampos 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;}
static _LIBCPP_CONSTEXPR_AFTER_CXX14
int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
static _LIBCPP_CONSTEXPR_AFTER_CXX14
size_t length(const char_type* __s) _NOEXCEPT;
static _LIBCPP_CONSTEXPR_AFTER_CXX14
const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
return __libcpp_is_constant_evaluated()
? _VSTD::__move_constexpr(__s1, __s2, __n)
: __n == 0 ? __s1 : _VSTD::wmemmove(__s1, __s2, __n);
}
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (!__libcpp_is_constant_evaluated()) {
_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
}
return __libcpp_is_constant_evaluated()
? _VSTD::__copy_constexpr(__s1, __s2, __n)
: __n == 0 ? __s1 : _VSTD::wmemcpy(__s1, __s2, __n);
}
static inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
{
return __libcpp_is_constant_evaluated()
? _VSTD::__assign_constexpr(__s, __n, __a)
: __n == 0 ? __s : _VSTD::wmemset(__s, __a, __n);
}
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(WEOF);}
};
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
int
char_traits<wchar_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (__n == 0)
return 0;
#if __has_feature(cxx_constexpr_string_builtins)
return __builtin_wmemcmp(__s1, __s2, __n);
#elif _LIBCPP_STD_VER <= 14
return _VSTD::wmemcmp(__s1, __s2, __n);
#else
for (; __n; --__n, ++__s1, ++__s2)
{
if (lt(*__s1, *__s2))
return -1;
if (lt(*__s2, *__s1))
return 1;
}
return 0;
#endif
}
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
size_t
char_traits<wchar_t>::length(const char_type* __s) _NOEXCEPT
{
#if __has_feature(cxx_constexpr_string_builtins)
return __builtin_wcslen(__s);
#elif _LIBCPP_STD_VER <= 14
return _VSTD::wcslen(__s);
#else
size_t __len = 0;
for (; !eq(*__s, char_type(0)); ++__s)
++__len;
return __len;
#endif
}
inline _LIBCPP_CONSTEXPR_AFTER_CXX14
const wchar_t*
char_traits<wchar_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
{
if (__n == 0)
return nullptr;
#if __has_feature(cxx_constexpr_string_builtins)
return __builtin_wmemchr(__s, __a, __n);
#elif _LIBCPP_STD_VER <= 14
return _VSTD::wmemchr(__s, __a, __n);
#else
for (; __n; --__n)
{
if (eq(*__s, __a))
return __s;
++__s;
}
return nullptr;
#endif
}
#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
template <class _Traits>
_LIBCPP_INLINE_VISIBILITY
_LIBCPP_CONSTEXPR
inline size_t __char_traits_length_checked(const typename _Traits::char_type* __s) _NOEXCEPT {
#if _LIBCPP_DEBUG_LEVEL >= 1
return __s ? _Traits::length(__s) : (_VSTD::__libcpp_debug_function(_VSTD::__libcpp_debug_info(__FILE__, __LINE__, "p == nullptr", "null pointer pass to non-null argument of char_traits<...>::length")), 0);
#else
return _Traits::length(__s);
#endif
}
#ifndef _LIBCPP_HAS_NO_CHAR8_T
template <>
struct _LIBCPP_TEMPLATE_VIS char_traits<char8_t>
{
typedef char8_t char_type;
typedef unsigned int int_type;
typedef streamoff off_type;
typedef u8streampos pos_type;
typedef mbstate_t state_type;
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;
static constexpr
size_t length(const char_type* __s) _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY static constexpr
const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
static _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
return __libcpp_is_constant_evaluated()
? _VSTD::__move_constexpr(__s1, __s2, __n)
: __n == 0 ? __s1 : (char_type*)_VSTD::memmove(__s1, __s2, __n);
}
static _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (!__libcpp_is_constant_evaluated()) {
_LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
}
return __libcpp_is_constant_evaluated()
? _VSTD::__copy_constexpr(__s1, __s2, __n)
: __n == 0 ? __s1 : (char_type*)_VSTD::memcpy(__s1, __s2, __n);
}
static _LIBCPP_CONSTEXPR_AFTER_CXX17
char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
{
return __libcpp_is_constant_evaluated()
? _VSTD::__assign_constexpr(__s, __n, __a)
: __n == 0 ? __s : (char_type*)_VSTD::memset(__s, to_int_type(__a), __n);
}
static inline constexpr int_type not_eof(int_type __c) noexcept
{return eq_int_type(__c, eof()) ? ~eof() : __c;}
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 nullptr;
}
#endif // _LIBCPP_HAS_NO_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 _LIBCPP_CONSTEXPR_AFTER_CXX17
static char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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 nullptr;
}
inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char16_t*
char_traits<char16_t>::move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (__n == 0) return __s1;
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 _LIBCPP_CONSTEXPR_AFTER_CXX17
char16_t*
char_traits<char16_t>::copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (!__libcpp_is_constant_evaluated()) {
_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 _LIBCPP_CONSTEXPR_AFTER_CXX17
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 _LIBCPP_CONSTEXPR_AFTER_CXX17
static char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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 nullptr;
}
inline _LIBCPP_CONSTEXPR_AFTER_CXX17
char32_t*
char_traits<char32_t>::move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (__n == 0) return __s1;
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 _LIBCPP_CONSTEXPR_AFTER_CXX17
char32_t*
char_traits<char32_t>::copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
{
if (!__libcpp_is_constant_evaluated()) {
_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 _LIBCPP_CONSTEXPR_AFTER_CXX17
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 == nullptr)
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) _NOEXCEPT {
// 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 == nullptr)
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) == nullptr)
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) == nullptr)
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
Reference in New Issue View Git Blame Copy Permalink