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Vinnie Falco
2019-09-09 13:56:14 -07:00
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//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/fixed_string
//
#ifndef BOOST_FIXED_STRING_CONFIG_HPP
#define BOOST_FIXED_STRING_CONFIG_HPP
#include <boost/utility/string_view.hpp>
namespace boost {
namespace fixed_string {
/// The type of `string_view` used by the library
using string_view = boost::string_view;
/// The type of `basic_string_view` used by the library
template<class CharT, class Traits>
using basic_string_view =
boost::basic_string_view<CharT, Traits>;
} // fixed_string
} // boost
#endif

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//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/fixed_string
//
#ifndef BOOST_FIXED_STRING_DETAIL_FIXED_STRING_HPP
#define BOOST_FIXED_STRING_DETAIL_FIXED_STRING_HPP
#include <boost/assert.hpp>
#include <boost/core/ignore_unused.hpp>
#include <iterator>
#include <type_traits>
namespace boost {
namespace fixed_string {
namespace detail {
// Because k-ballo said so
template<class T>
using is_input_iterator =
std::integral_constant<bool,
! std::is_integral<T>::value>;
template<class CharT, class Traits>
int
lexicographical_compare(
CharT const* s1, std::size_t n1,
CharT const* s2, std::size_t n2)
{
if(n1 < n2)
return Traits::compare(
s1, s2, n1) <= 0 ? -1 : 1;
if(n1 > n2)
return Traits::compare(
s1, s2, n2) >= 0 ? 1 : -1;
return Traits::compare(s1, s2, n1);
}
template<class CharT, class Traits>
int
lexicographical_compare(
basic_string_view<CharT, Traits> s1,
CharT const* s2, std::size_t n2)
{
return detail::lexicographical_compare<
CharT, Traits>(s1.data(), s1.size(), s2, n2);
}
template<class CharT, class Traits>
int
lexicographical_compare(
basic_string_view<CharT, Traits> s1,
basic_string_view<CharT, Traits> s2)
{
return detail::lexicographical_compare<CharT, Traits>(
s1.data(), s1.size(), s2.data(), s2.size());
}
// Maximum number of characters in the decimal
// representation of a binary number. This includes
// the potential minus sign.
//
inline
std::size_t constexpr
max_digits(std::size_t bytes)
{
return static_cast<std::size_t>(
bytes * 2.41) + 1 + 1;
}
template<class CharT, class Integer, class Traits>
CharT*
raw_to_string(
CharT* buf, Integer x, std::true_type)
{
if(x == 0)
{
Traits::assign(*--buf, '0');
return buf;
}
if(x < 0)
{
x = -x;
for(;x > 0; x /= 10)
Traits::assign(*--buf ,
"0123456789"[x % 10]);
Traits::assign(*--buf, '-');
return buf;
}
for(;x > 0; x /= 10)
Traits::assign(*--buf ,
"0123456789"[x % 10]);
return buf;
}
template<class CharT, class Integer, class Traits>
CharT*
raw_to_string(
CharT* buf, Integer x, std::false_type)
{
if(x == 0)
{
*--buf = '0';
return buf;
}
for(;x > 0; x /= 10)
Traits::assign(*--buf ,
"0123456789"[x % 10]);
return buf;
}
template<
class CharT,
class Integer,
class Traits = std::char_traits<CharT>>
CharT*
raw_to_string(CharT* last, std::size_t size, Integer i)
{
boost::ignore_unused(size);
BOOST_ASSERT(size >= max_digits(sizeof(Integer)));
return raw_to_string<CharT, Integer, Traits>(
last, i, std::is_signed<Integer>{});
}
} // detail
} // fixed_string
} // boost
#endif

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//
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/fixed_string
//
#ifndef BOOST_FIXED_STRING_IMPL_FIXED_STRING_HPP
#define BOOST_FIXED_STRING_IMPL_FIXED_STRING_HPP
#include <boost/fixed_string/detail/fixed_string.hpp>
#include <boost/static_assert.hpp>
#include <boost/throw_exception.hpp>
namespace boost {
namespace fixed_string {
//
// (constructor)
//
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string()
{
n_ = 0;
term();
}
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string(size_type count, CharT ch)
{
assign(count, ch);
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
fixed_string<N, CharT, Traits>::
fixed_string(fixed_string<M, CharT, Traits> const& other,
size_type pos)
{
assign(other, pos);
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
fixed_string<N, CharT, Traits>::
fixed_string(fixed_string<M, CharT, Traits> const& other,
size_type pos, size_type count)
{
assign(other, pos, count);
}
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string(CharT const* s, size_type count)
{
assign(s, count);
}
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string(CharT const* s)
{
auto const count = Traits::length(s);
if(count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"count > max_size()"});
n_ = count;
Traits::copy(&s_[0], s, n_ + 1);
}
template<std::size_t N, class CharT, class Traits>
template<class InputIt>
fixed_string<N, CharT, Traits>::
fixed_string(InputIt first, InputIt last)
{
assign(first, last);
}
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string(fixed_string const& s)
{
assign(s);
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
fixed_string<N, CharT, Traits>::
fixed_string(fixed_string<M, CharT, Traits> const& s)
{
assign(s);
}
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string(std::initializer_list<CharT> init)
{
assign(init.begin(), init.end());
}
template<std::size_t N, class CharT, class Traits>
fixed_string<N, CharT, Traits>::
fixed_string(string_view_type sv)
{
assign(sv);
}
template<std::size_t N, class CharT, class Traits>
template<class T, class>
fixed_string<N, CharT, Traits>::
fixed_string(T const& t, size_type pos, size_type n)
{
assign(t, pos, n);
}
//
// (assignment)
//
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
operator=(CharT const* s) ->
fixed_string&
{
auto const count = Traits::length(s);
if(count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"count > max_size()"});
n_ = count;
Traits::copy(&s_[0], s, n_ + 1);
return *this;
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
assign(size_type count, CharT ch) ->
fixed_string&
{
if(count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"count > max_size()"});
n_ = count;
Traits::assign(&s_[0], n_, ch);
term();
return *this;
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
assign(fixed_string const& str) ->
fixed_string&
{
n_ = str.n_;
auto const n = n_ + 1;
// VFALCO I can't remember the thinking behind this
//BOOST_BEAST_ASSUME(n != 0);
Traits::copy(&s_[0], &str.s_[0], n);
return *this;
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
auto
fixed_string<N, CharT, Traits>::
assign(fixed_string<M, CharT, Traits> const& str,
size_type pos, size_type count) ->
fixed_string&
{
auto const ss = str.substr(pos, count);
return assign(ss.data(), ss.size());
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
assign(CharT const* s, size_type count) ->
fixed_string&
{
if(count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"count > max_size()"});
n_ = count;
Traits::copy(&s_[0], s, n_);
term();
return *this;
}
template<std::size_t N, class CharT, class Traits>
template<class InputIt>
auto
fixed_string<N, CharT, Traits>::
assign(InputIt first, InputIt last) ->
fixed_string&
{
std::size_t const n = std::distance(first, last);
if(n > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"n > max_size()"});
n_ = n;
for(auto it = &s_[0]; first != last; ++it, ++first)
Traits::assign(*it, *first);
term();
return *this;
}
template<std::size_t N, class CharT, class Traits>
template<class T>
auto
fixed_string<N, CharT, Traits>::
assign(T const& t, size_type pos, size_type count) ->
typename std::enable_if<std::is_convertible<T,
string_view_type>::value, fixed_string&>::type
{
auto const sv = string_view_type(t).substr(pos, count);
if(sv.size() > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"sv.size() > max_size()"});
n_ = sv.size();
Traits::copy(&s_[0], &sv[0], n_);
term();
return *this;
}
//
// Element access
//
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
at(size_type pos) ->
reference
{
if(pos >= size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"pos >= size()"});
return s_[pos];
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
at(size_type pos) const ->
const_reference
{
if(pos >= size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"pos >= size()"});
return s_[pos];
}
//
// Capacity
//
template<std::size_t N, class CharT, class Traits>
void
fixed_string<N, CharT, Traits>::
reserve(std::size_t n)
{
if(n > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"n > max_size()"});
}
//
// Operations
//
template<std::size_t N, class CharT, class Traits>
void
fixed_string<N, CharT, Traits>::
clear()
{
n_ = 0;
term();
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
insert(size_type index, size_type count, CharT ch) ->
fixed_string&
{
if(index > size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"index > size()"});
insert(begin() + index, count, ch);
return *this;
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
insert(size_type index, CharT const* s, size_type count) ->
fixed_string&
{
if(index > size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"index > size()"});
if(size() + count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"size() + count > max_size()"});
Traits::move(
&s_[index + count], &s_[index], size() - index);
n_ += count;
Traits::copy(&s_[index], s, count);
term();
return *this;
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
auto
fixed_string<N, CharT, Traits>::
insert(size_type index,
fixed_string<M, CharT, Traits> const& str,
size_type index_str, size_type count) ->
fixed_string&
{
auto const ss = str.substr(index_str, count);
return insert(index, ss.data(), ss.size());
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
insert(const_iterator pos, size_type count, CharT ch) ->
iterator
{
if(size() + count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"size() + count() > max_size()"});
auto const index = pos - &s_[0];
Traits::move(
&s_[index + count], &s_[index], size() - index);
n_ += count;
Traits::assign(&s_[index], count, ch);
term();
return &s_[index];
}
template<std::size_t N, class CharT, class Traits>
template<class InputIt>
auto
fixed_string<N, CharT, Traits>::
insert(const_iterator pos, InputIt first, InputIt last) ->
typename std::enable_if<
detail::is_input_iterator<InputIt>::value,
iterator>::type
{
std::size_t const count = std::distance(first, last);
if(size() + count > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"size() + count > max_size()"});
std::size_t const index = pos - begin();
Traits::move(
&s_[index + count], &s_[index], size() - index);
n_ += count;
for(auto it = begin() + index;
first != last; ++it, ++first)
Traits::assign(*it, *first);
term();
return begin() + index;
}
template<std::size_t N, class CharT, class Traits>
template<class T>
auto
fixed_string<N, CharT, Traits>::
insert(size_type index, const T& t,
size_type index_str, size_type count) ->
typename std::enable_if<std::is_convertible<
T const&, string_view_type>::value &&
! std::is_convertible<T const&, CharT const*>::value,
fixed_string&>::type
{
auto const str =
string_view_type(t).substr(index_str, count);
return insert(index, str.data(), str.size());
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
erase(size_type index, size_type count) ->
fixed_string&
{
if(index > size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"index > size()"});
auto const n = (std::min)(count, size() - index);
Traits::move(
&s_[index], &s_[index + n], size() - (index + n) + 1);
n_ -= n;
return *this;
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
erase(const_iterator pos) ->
iterator
{
erase(pos - begin(), 1);
return begin() + (pos - begin());
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
erase(const_iterator first, const_iterator last) ->
iterator
{
erase(first - begin(),
std::distance(first, last));
return begin() + (first - begin());
}
template<std::size_t N, class CharT, class Traits>
void
fixed_string<N, CharT, Traits>::
push_back(CharT ch)
{
if(size() >= max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"size() >= max_size()"});
Traits::assign(s_[n_++], ch);
term();
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
auto
fixed_string<N, CharT, Traits>::
append(fixed_string<M, CharT, Traits> const& str,
size_type pos, size_type count) ->
fixed_string&
{
// Valid range is [0, size)
if(pos >= str.size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"pos > str.size()"});
string_view_type const ss{&str.s_[pos],
(std::min)(count, str.size() - pos)};
insert(size(), ss.data(), ss.size());
return *this;
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
substr(size_type pos, size_type count) const ->
string_view_type
{
if(pos > size())
BOOST_THROW_EXCEPTION(std::out_of_range{
"pos > size()"});
return{&s_[pos], (std::min)(count, size() - pos)};
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
copy(CharT* dest, size_type count, size_type pos) const ->
size_type
{
auto const str = substr(pos, count);
Traits::copy(dest, str.data(), str.size());
return str.size();
}
template<std::size_t N, class CharT, class Traits>
void
fixed_string<N, CharT, Traits>::
resize(std::size_t n)
{
if(n > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"n > max_size()"});
if(n > n_)
Traits::assign(&s_[n_], n - n_, CharT{});
n_ = n;
term();
}
template<std::size_t N, class CharT, class Traits>
void
fixed_string<N, CharT, Traits>::
resize(std::size_t n, CharT c)
{
if(n > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"n > max_size()"});
if(n > n_)
Traits::assign(&s_[n_], n - n_, c);
n_ = n;
term();
}
template<std::size_t N, class CharT, class Traits>
void
fixed_string<N, CharT, Traits>::
swap(fixed_string& str)
{
fixed_string tmp(str);
str.n_ = n_;
Traits::copy(&str.s_[0], &s_[0], n_ + 1);
n_ = tmp.n_;
Traits::copy(&s_[0], &tmp.s_[0], n_ + 1);
}
template<std::size_t N, class CharT, class Traits>
template<std::size_t M>
void
fixed_string<N, CharT, Traits>::
swap(fixed_string<M, CharT, Traits>& str)
{
if(size() > str.max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"size() > str.max_size()"});
if(str.size() > max_size())
BOOST_THROW_EXCEPTION(std::length_error{
"str.size() > max_size()"});
fixed_string tmp(str);
str.n_ = n_;
Traits::copy(&str.s_[0], &s_[0], n_ + 1);
n_ = tmp.n_;
Traits::copy(&s_[0], &tmp.s_[0], n_ + 1);
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
assign_char(CharT ch, std::true_type) ->
fixed_string&
{
n_ = 1;
Traits::assign(s_[0], ch);
term();
return *this;
}
template<std::size_t N, class CharT, class Traits>
auto
fixed_string<N, CharT, Traits>::
assign_char(CharT, std::false_type) ->
fixed_string&
{
BOOST_THROW_EXCEPTION(std::length_error{
"max_size() == 0"});
}
template<class Integer, class>
fixed_string<detail::max_digits(sizeof(Integer))>
to_fixed_string(Integer x)
{
using CharT = char;
using Traits = std::char_traits<CharT>;
BOOST_STATIC_ASSERT(std::is_integral<Integer>::value);
char buf[detail::max_digits(sizeof(Integer))];
auto last = buf + sizeof(buf);
auto it = detail::raw_to_string<
CharT, Integer, Traits>(last, sizeof(buf), x);
fixed_string<detail::max_digits(sizeof(Integer))> s;
s.resize(static_cast<std::size_t>(last - it));
auto p = s.data();
while(it < last)
Traits::assign(*p++, *it++);
return s;
}
} // fixed_string
} // boost
#endif