mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
567 lines
18 KiB
C++
567 lines
18 KiB
C++
// Components for manipulating non-owning sequences of characters -*- C++ -*-
|
|
|
|
|
|
#ifndef COMMON_GDB_STRING_VIEW_H
|
|
#define COMMON_GDB_STRING_VIEW_H
|
|
|
|
// Note: This file has been stolen from the gcc repo
|
|
// (libstdc++-v3/include/experimental/string_view) and has local modifications.
|
|
|
|
// Copyright (C) 2013-2021 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
//
|
|
// N3762 basic_string_view library
|
|
//
|
|
|
|
|
|
#if __cplusplus >= 201703L
|
|
|
|
#include <string_view>
|
|
|
|
namespace gdb {
|
|
using string_view = std::string_view;
|
|
} /* namespace gdb */
|
|
|
|
#else /* __cplusplus < 201703L */
|
|
|
|
#include <string>
|
|
#include <limits>
|
|
#include "gdb_assert.h"
|
|
|
|
namespace gdb {
|
|
|
|
/**
|
|
* @class basic_string_view <experimental/string_view>
|
|
* @brief A non-owning reference to a string.
|
|
*
|
|
* @ingroup strings
|
|
* @ingroup sequences
|
|
* @ingroup experimental
|
|
*
|
|
* @tparam _CharT Type of character
|
|
* @tparam _Traits Traits for character type, defaults to
|
|
* char_traits<_CharT>.
|
|
*
|
|
* A basic_string_view looks like this:
|
|
*
|
|
* @code
|
|
* _CharT* _M_str
|
|
* size_t _M_len
|
|
* @endcode
|
|
*/
|
|
template<typename _CharT, typename _Traits = std::char_traits<_CharT>>
|
|
class basic_string_view
|
|
{
|
|
public:
|
|
|
|
// types
|
|
using traits_type = _Traits;
|
|
using value_type = _CharT;
|
|
using pointer = const _CharT*;
|
|
using const_pointer = const _CharT*;
|
|
using reference = const _CharT&;
|
|
using const_reference = const _CharT&;
|
|
using const_iterator = const _CharT*;
|
|
using iterator = const_iterator;
|
|
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
|
|
using reverse_iterator = const_reverse_iterator;
|
|
using size_type = size_t;
|
|
using difference_type = ptrdiff_t;
|
|
static constexpr size_type npos = size_type(-1);
|
|
|
|
// [string.view.cons], construct/copy
|
|
|
|
constexpr
|
|
basic_string_view() noexcept
|
|
: _M_len{0}, _M_str{nullptr}
|
|
{ }
|
|
|
|
constexpr basic_string_view(const basic_string_view&) noexcept = default;
|
|
|
|
template<typename _Allocator>
|
|
basic_string_view(const std::basic_string<_CharT, _Traits,
|
|
_Allocator>& __str) noexcept
|
|
: _M_len{__str.length()}, _M_str{__str.data()}
|
|
{ }
|
|
|
|
/*constexpr*/ basic_string_view(const _CharT* __str)
|
|
: _M_len{__str == nullptr ? 0 : traits_type::length(__str)},
|
|
_M_str{__str}
|
|
{ }
|
|
|
|
constexpr basic_string_view(const _CharT* __str, size_type __len)
|
|
: _M_len{__len},
|
|
_M_str{__str}
|
|
{ }
|
|
|
|
basic_string_view&
|
|
operator=(const basic_string_view&) noexcept = default;
|
|
|
|
// [string.view.iterators], iterators
|
|
|
|
constexpr const_iterator
|
|
begin() const noexcept
|
|
{ return this->_M_str; }
|
|
|
|
constexpr const_iterator
|
|
end() const noexcept
|
|
{ return this->_M_str + this->_M_len; }
|
|
|
|
constexpr const_iterator
|
|
cbegin() const noexcept
|
|
{ return this->_M_str; }
|
|
|
|
constexpr const_iterator
|
|
cend() const noexcept
|
|
{ return this->_M_str + this->_M_len; }
|
|
|
|
const_reverse_iterator
|
|
rbegin() const noexcept
|
|
{ return const_reverse_iterator(this->end()); }
|
|
|
|
const_reverse_iterator
|
|
rend() const noexcept
|
|
{ return const_reverse_iterator(this->begin()); }
|
|
|
|
const_reverse_iterator
|
|
crbegin() const noexcept
|
|
{ return const_reverse_iterator(this->end()); }
|
|
|
|
const_reverse_iterator
|
|
crend() const noexcept
|
|
{ return const_reverse_iterator(this->begin()); }
|
|
|
|
// [string.view.capacity], capacity
|
|
|
|
constexpr size_type
|
|
size() const noexcept
|
|
{ return this->_M_len; }
|
|
|
|
constexpr size_type
|
|
length() const noexcept
|
|
{ return _M_len; }
|
|
|
|
constexpr size_type
|
|
max_size() const noexcept
|
|
{
|
|
return (npos - sizeof(size_type) - sizeof(void*))
|
|
/ sizeof(value_type) / 4;
|
|
}
|
|
|
|
constexpr bool
|
|
empty() const noexcept
|
|
{ return this->_M_len == 0; }
|
|
|
|
// [string.view.access], element access
|
|
|
|
constexpr const _CharT&
|
|
operator[](size_type __pos) const
|
|
{
|
|
// TODO: Assert to restore in a way compatible with the constexpr.
|
|
// __glibcxx_assert(__pos < this->_M_len);
|
|
return *(this->_M_str + __pos);
|
|
}
|
|
|
|
constexpr const _CharT&
|
|
at(size_type __pos) const
|
|
{
|
|
return __pos < this->_M_len
|
|
? *(this->_M_str + __pos)
|
|
: (error (_("basic_string_view::at: __pos "
|
|
"(which is %zu) >= this->size() "
|
|
"(which is %zu)"),
|
|
__pos, this->size()),
|
|
*this->_M_str);
|
|
}
|
|
|
|
constexpr const _CharT&
|
|
front() const
|
|
{
|
|
// TODO: Assert to restore in a way compatible with the constexpr.
|
|
// __glibcxx_assert(this->_M_len > 0);
|
|
return *this->_M_str;
|
|
}
|
|
|
|
constexpr const _CharT&
|
|
back() const
|
|
{
|
|
// TODO: Assert to restore in a way compatible with the constexpr.
|
|
// __glibcxx_assert(this->_M_len > 0);
|
|
return *(this->_M_str + this->_M_len - 1);
|
|
}
|
|
|
|
constexpr const _CharT*
|
|
data() const noexcept
|
|
{ return this->_M_str; }
|
|
|
|
// [string.view.modifiers], modifiers:
|
|
|
|
/*constexpr*/ void
|
|
remove_prefix(size_type __n)
|
|
{
|
|
gdb_assert (this->_M_len >= __n);
|
|
this->_M_str += __n;
|
|
this->_M_len -= __n;
|
|
}
|
|
|
|
/*constexpr*/ void
|
|
remove_suffix(size_type __n)
|
|
{ this->_M_len -= __n; }
|
|
|
|
/*constexpr*/ void
|
|
swap(basic_string_view& __sv) noexcept
|
|
{
|
|
auto __tmp = *this;
|
|
*this = __sv;
|
|
__sv = __tmp;
|
|
}
|
|
|
|
|
|
// [string.view.ops], string operations:
|
|
|
|
template<typename _Allocator>
|
|
explicit operator std::basic_string<_CharT, _Traits, _Allocator>() const
|
|
{
|
|
return { this->_M_str, this->_M_len };
|
|
}
|
|
|
|
size_type
|
|
copy(_CharT* __str, size_type __n, size_type __pos = 0) const
|
|
{
|
|
gdb_assert (__str != nullptr || __n == 0);
|
|
if (__pos > this->_M_len)
|
|
error (_("basic_string_view::copy: __pos "
|
|
"(which is %zu) > this->size() "
|
|
"(which is %zu)"),
|
|
__pos, this->size());
|
|
size_type __rlen{std::min(__n, size_type{this->_M_len - __pos})};
|
|
for (auto __begin = this->_M_str + __pos,
|
|
__end = __begin + __rlen; __begin != __end;)
|
|
*__str++ = *__begin++;
|
|
return __rlen;
|
|
}
|
|
|
|
|
|
// [string.view.ops], string operations:
|
|
|
|
/*constexpr*/ basic_string_view
|
|
substr(size_type __pos, size_type __n=npos) const
|
|
{
|
|
return __pos <= this->_M_len
|
|
? basic_string_view{this->_M_str + __pos,
|
|
std::min(__n, size_type{this->_M_len - __pos})}
|
|
: (error (_("basic_string_view::substr: __pos "
|
|
"(which is %zu) > this->size() "
|
|
"(which is %zu)"),
|
|
__pos, this->size()), basic_string_view{});
|
|
}
|
|
|
|
/*constexpr*/ int
|
|
compare(basic_string_view __str) const noexcept
|
|
{
|
|
int __ret = traits_type::compare(this->_M_str, __str._M_str,
|
|
std::min(this->_M_len, __str._M_len));
|
|
if (__ret == 0)
|
|
__ret = _S_compare(this->_M_len, __str._M_len);
|
|
return __ret;
|
|
}
|
|
|
|
/*constexpr*/ int
|
|
compare(size_type __pos1, size_type __n1, basic_string_view __str) const
|
|
{ return this->substr(__pos1, __n1).compare(__str); }
|
|
|
|
/*constexpr*/ int
|
|
compare(size_type __pos1, size_type __n1,
|
|
basic_string_view __str, size_type __pos2, size_type __n2) const
|
|
{ return this->substr(__pos1, __n1).compare(__str.substr(__pos2, __n2)); }
|
|
|
|
/*constexpr*/ int
|
|
compare(const _CharT* __str) const noexcept
|
|
{ return this->compare(basic_string_view{__str}); }
|
|
|
|
/*constexpr*/ int
|
|
compare(size_type __pos1, size_type __n1, const _CharT* __str) const
|
|
{ return this->substr(__pos1, __n1).compare(basic_string_view{__str}); }
|
|
|
|
/*constexpr*/ int
|
|
compare(size_type __pos1, size_type __n1,
|
|
const _CharT* __str, size_type __n2) const
|
|
{
|
|
return this->substr(__pos1, __n1)
|
|
.compare(basic_string_view(__str, __n2));
|
|
}
|
|
|
|
/*constexpr*/ size_type
|
|
find(basic_string_view __str, size_type __pos = 0) const noexcept
|
|
{ return this->find(__str._M_str, __pos, __str._M_len); }
|
|
|
|
/*constexpr*/ size_type
|
|
find(_CharT __c, size_type __pos=0) const noexcept;
|
|
|
|
/*constexpr*/ size_type
|
|
find(const _CharT* __str, size_type __pos, size_type __n) const noexcept;
|
|
|
|
/*constexpr*/ size_type
|
|
find(const _CharT* __str, size_type __pos=0) const noexcept
|
|
{ return this->find(__str, __pos, traits_type::length(__str)); }
|
|
|
|
/*constexpr*/ size_type
|
|
rfind(basic_string_view __str, size_type __pos = npos) const noexcept
|
|
{ return this->rfind(__str._M_str, __pos, __str._M_len); }
|
|
|
|
/*constexpr*/ size_type
|
|
rfind(_CharT __c, size_type __pos = npos) const noexcept;
|
|
|
|
/*constexpr*/ size_type
|
|
rfind(const _CharT* __str, size_type __pos, size_type __n) const noexcept;
|
|
|
|
/*constexpr*/ size_type
|
|
rfind(const _CharT* __str, size_type __pos = npos) const noexcept
|
|
{ return this->rfind(__str, __pos, traits_type::length(__str)); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_of(basic_string_view __str, size_type __pos = 0) const noexcept
|
|
{ return this->find_first_of(__str._M_str, __pos, __str._M_len); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_of(_CharT __c, size_type __pos = 0) const noexcept
|
|
{ return this->find(__c, __pos); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_of(const _CharT* __str, size_type __pos, size_type __n) const;
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_of(const _CharT* __str, size_type __pos = 0) const noexcept
|
|
{ return this->find_first_of(__str, __pos, traits_type::length(__str)); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_of(basic_string_view __str,
|
|
size_type __pos = npos) const noexcept
|
|
{ return this->find_last_of(__str._M_str, __pos, __str._M_len); }
|
|
|
|
size_type
|
|
find_last_of(_CharT __c, size_type __pos=npos) const noexcept
|
|
{ return this->rfind(__c, __pos); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_of(const _CharT* __str, size_type __pos, size_type __n) const;
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_of(const _CharT* __str, size_type __pos = npos) const noexcept
|
|
{ return this->find_last_of(__str, __pos, traits_type::length(__str)); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_not_of(basic_string_view __str,
|
|
size_type __pos = 0) const noexcept
|
|
{ return this->find_first_not_of(__str._M_str, __pos, __str._M_len); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_not_of(_CharT __c, size_type __pos = 0) const noexcept;
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_not_of(const _CharT* __str,
|
|
size_type __pos, size_type __n) const;
|
|
|
|
/*constexpr*/ size_type
|
|
find_first_not_of(const _CharT* __str, size_type __pos = 0) const noexcept
|
|
{
|
|
return this->find_first_not_of(__str, __pos,
|
|
traits_type::length(__str));
|
|
}
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_not_of(basic_string_view __str,
|
|
size_type __pos = npos) const noexcept
|
|
{ return this->find_last_not_of(__str._M_str, __pos, __str._M_len); }
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_not_of(_CharT __c, size_type __pos = npos) const noexcept;
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_not_of(const _CharT* __str,
|
|
size_type __pos, size_type __n) const;
|
|
|
|
/*constexpr*/ size_type
|
|
find_last_not_of(const _CharT* __str,
|
|
size_type __pos = npos) const noexcept
|
|
{
|
|
return this->find_last_not_of(__str, __pos,
|
|
traits_type::length(__str));
|
|
}
|
|
|
|
private:
|
|
|
|
static constexpr int
|
|
_S_compare(size_type __n1, size_type __n2) noexcept
|
|
{
|
|
return difference_type(__n1 - __n2) > std::numeric_limits<int>::max()
|
|
? std::numeric_limits<int>::max()
|
|
: difference_type(__n1 - __n2) < std::numeric_limits<int>::min()
|
|
? std::numeric_limits<int>::min()
|
|
: static_cast<int>(difference_type(__n1 - __n2));
|
|
}
|
|
|
|
size_t _M_len;
|
|
const _CharT* _M_str;
|
|
};
|
|
|
|
// [string.view.comparison], non-member basic_string_view comparison functions
|
|
|
|
namespace __detail
|
|
{
|
|
// Identity transform to create a non-deduced context, so that only one
|
|
// argument participates in template argument deduction and the other
|
|
// argument gets implicitly converted to the deduced type. See n3766.html.
|
|
template<typename _Tp>
|
|
using __idt = typename std::common_type<_Tp>::type;
|
|
}
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator==(basic_string_view<_CharT, _Traits> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.size() == __y.size() && __x.compare(__y) == 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator==(basic_string_view<_CharT, _Traits> __x,
|
|
__detail::__idt<basic_string_view<_CharT, _Traits>> __y) noexcept
|
|
{ return __x.size() == __y.size() && __x.compare(__y) == 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator==(__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.size() == __y.size() && __x.compare(__y) == 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator!=(basic_string_view<_CharT, _Traits> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return !(__x == __y); }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator!=(basic_string_view<_CharT, _Traits> __x,
|
|
__detail::__idt<basic_string_view<_CharT, _Traits>> __y) noexcept
|
|
{ return !(__x == __y); }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator!=(__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return !(__x == __y); }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator< (basic_string_view<_CharT, _Traits> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) < 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator< (basic_string_view<_CharT, _Traits> __x,
|
|
__detail::__idt<basic_string_view<_CharT, _Traits>> __y) noexcept
|
|
{ return __x.compare(__y) < 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator< (__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) < 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator> (basic_string_view<_CharT, _Traits> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) > 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator> (basic_string_view<_CharT, _Traits> __x,
|
|
__detail::__idt<basic_string_view<_CharT, _Traits>> __y) noexcept
|
|
{ return __x.compare(__y) > 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator> (__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) > 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator<=(basic_string_view<_CharT, _Traits> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) <= 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator<=(basic_string_view<_CharT, _Traits> __x,
|
|
__detail::__idt<basic_string_view<_CharT, _Traits>> __y) noexcept
|
|
{ return __x.compare(__y) <= 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator<=(__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) <= 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator>=(basic_string_view<_CharT, _Traits> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) >= 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator>=(basic_string_view<_CharT, _Traits> __x,
|
|
__detail::__idt<basic_string_view<_CharT, _Traits>> __y) noexcept
|
|
{ return __x.compare(__y) >= 0; }
|
|
|
|
template<typename _CharT, typename _Traits>
|
|
/*constexpr*/ bool
|
|
operator>=(__detail::__idt<basic_string_view<_CharT, _Traits>> __x,
|
|
basic_string_view<_CharT, _Traits> __y) noexcept
|
|
{ return __x.compare(__y) >= 0; }
|
|
|
|
// basic_string_view typedef names
|
|
|
|
using string_view = basic_string_view<char>;
|
|
} /* namespace gdb */
|
|
|
|
#include "gdb_string_view.tcc"
|
|
|
|
#endif // __cplusplus < 201703L
|
|
|
|
namespace gdb {
|
|
|
|
static inline std::string
|
|
to_string(const gdb::string_view &view)
|
|
{
|
|
return { view.data (), view.size () };
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* COMMON_GDB_STRING_VIEW_H */
|