301 lines
9.9 KiB
C++
301 lines
9.9 KiB
C++
/**
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This file is a part of rexy's general purpose library
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Copyright (C) 2020 rexy712
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef REXY_STRING_BASE_TPP
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#define REXY_STRING_BASE_TPP
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#include <utility> //forward, move, swap, etc
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#include <cstdlib> //memcpy
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#include <cstring> //strlen, strcpy
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#include "cx/utility.hpp" //max
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#include "detail/string_appender.hpp"
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#define STOP_STRICT_ALIAS_WARNING(x) (x)
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namespace rexy{
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template<class Char, class Allocator>
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constexpr basic_string<Char,Allocator>::basic_string(void)noexcept{}
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template<class Char, class Allocator>
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constexpr basic_string<Char,Allocator>::basic_string(rexy::steal<pointer> data)noexcept:
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string_base<Char>(data.value() ? cx::strlen(data.value()) : 0)
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{
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m_data = data.value();
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m_length = m_cap;
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}
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template<class Char, class Allocator>
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constexpr basic_string<Char,Allocator>::basic_string(rexy::steal<pointer> data, size_type len)noexcept:
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string_base<Char>(data.value(), len, len){}
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template<class Char, class Allocator>
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constexpr basic_string<Char,Allocator>::basic_string(rexy::steal<pointer> data, size_type len, size_type cap)noexcept:
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string_base<Char>(data.value(), len, cap){}
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template<class Char, class Allocator>
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basic_string<Char,Allocator>::basic_string(const_pointer data, size_type len)
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noexcept(noexcept(this->allocate(0))):
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string_base<Char>(len ? this->allocate(sizeof(Char)*(len+1)) : nullptr, len, len)
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{
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if(len){
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memcpy(m_data, data, len*sizeof(Char));
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m_data[len] = 0;
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}
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}
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template<class Char, class Allocator>
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basic_string<Char,Allocator>::basic_string(const_pointer data)
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noexcept(noexcept(this->allocate(0))):
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string_base<Char>(data ? cx::strlen(data) : 0)
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{
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if(m_cap){
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m_data = this->allocate(sizeof(Char)*(m_cap+1));
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memcpy(m_data, data, sizeof(Char)*m_cap);
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m_length = m_cap;
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}
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}
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template<class Char, class Allocator>
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basic_string<Char,Allocator>::basic_string(size_type len)
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noexcept(noexcept(this->allocate(0))):
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string_base<Char>(len ? this->allocate(sizeof(Char)*(len+1)) : nullptr, len)
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{
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if(len)
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m_data[len] = 0;
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}
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template<class Char, class Allocator>
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basic_string<Char,Allocator>::basic_string(size_type len, size_type cap)
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noexcept(noexcept(this->allocate(0))):
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string_base<Char>(len ? this->allocate(sizeof(Char)*(len+1)) : nullptr, len, cap)
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{
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if(len)
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m_data[len] = 0;
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}
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//normal copy and move ctors
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template<class Char, class Allocator>
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basic_string<Char,Allocator>::basic_string(const basic_string& b)
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noexcept(noexcept(this->allocate(0))):
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string_base<Char>(b.m_length ? this->allocate(sizeof(Char)*(b.m_length+1)) : nullptr, b.m_length, b.m_length)
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{
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if(b.m_length)
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memcpy(m_data, b.m_data, sizeof(Char)*(b.m_length+1));
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}
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template<class Char, class Allocator>
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constexpr basic_string<Char,Allocator>::basic_string(basic_string&& s)
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noexcept(noexcept(cx::exchange(s.m_data, nullptr))):
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string_base<Char>(cx::exchange(s.m_data, nullptr), s.m_length, s.m_cap){}
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template<class Char, class Allocator>
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template<class C>
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basic_string<Char,Allocator>::basic_string(const string_base<C>& b)
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noexcept(noexcept(this->allocate(0))):
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string_base<Char>(b.length() ? this->allocate(sizeof(Char)*(b.length()+1)) : nullptr, b.length(), b.length())
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{
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if(b.length())
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memcpy(m_data, b.get(), sizeof(Char)*(b.length()+1));
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}
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//dtor
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template<class Char, class Allocator>
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basic_string<Char,Allocator>::~basic_string(void)
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noexcept(noexcept(this->deallocate(nullptr, 0)))
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{
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this->deallocate(m_data, sizeof(Char)*(m_cap+1));
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}
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template<class Char, class Allocator>
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basic_string<Char,Allocator>& basic_string<Char,Allocator>::operator=(const basic_string& s)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr, 0)))
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{
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if(s.m_length < m_cap){
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memcpy(m_data, s.m_data, sizeof(Char)*(s.m_length+1));
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m_length = s.m_length;
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return *this;
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}
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basic_string tmp(s);
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return (*this = std::move(tmp));
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}
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template<class Char, class Allocator>
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constexpr basic_string<Char,Allocator>& basic_string<Char,Allocator>::operator=(basic_string&& s)noexcept{
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cx::swap(m_data, s.m_data);
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m_length = s.m_length;
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m_cap = s.m_cap;
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return *this;
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}
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//Copy from c string
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template<class Char, class Allocator>
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basic_string<Char,Allocator>& basic_string<Char,Allocator>::operator=(const_pointer c)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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return _copy_string(c, cx::strlen(c));
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}
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//Copy from other string_base
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template<class Char, class Allocator>
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template<class C>
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basic_string<Char,Allocator>& basic_string<Char,Allocator>::operator=(const string_base<C>& s)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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return _copy_string(s.get(), s.length());
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}
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//Replace managed pointer. Frees existing value
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template<class Char, class Allocator>
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void basic_string<Char,Allocator>::reset(pointer val)
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noexcept(noexcept(this->deallocate(nullptr,0)))
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{
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this->deallocate(m_data,sizeof(Char)*(m_cap+1));
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m_data = val;
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m_length = val ? cx::strlen(val) : 0;
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m_cap = m_length;
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}
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template<class Char, class Allocator>
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void basic_string<Char,Allocator>::reset(pointer val, size_type len)
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noexcept(noexcept(this->deallocate(nullptr,0)))
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{
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this->deallocate(m_data,sizeof(Char)*(m_cap+1));
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m_data = val;
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m_length = len;
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m_cap = len;
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}
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template<class Char, class Allocator>
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bool basic_string<Char,Allocator>::resize(size_type newsize)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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if(newsize < m_cap)
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return false;
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return (*this = basic_string(m_data, newsize));
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}
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template<class Char, class Allocator>
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void basic_string<Char,Allocator>::append(const_pointer data, size_type len)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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if(len+m_length <= m_cap){
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memcpy(m_data+m_length, data, sizeof(Char)*len);
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m_length += len;
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m_data[m_length] = 0;
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}else if(!m_data){
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*this = basic_string(len, len);
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memcpy(m_data, data, sizeof(Char)*len);
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m_data[len] = 0;
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}else{
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auto newsize = cx::max(m_length+len, m_cap*2);
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basic_string tmp(newsize);
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tmp.append(m_data, m_length);
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tmp.append(data, len);
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*this = std::move(tmp);
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}
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}
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template<class Char, class Allocator>
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void basic_string<Char,Allocator>::append(const_pointer data)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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if(data)
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append(data, cx::strlen(data));
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}
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template<class Char, class Allocator>
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template<class C>
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void basic_string<Char,Allocator>::append(const string_base<C>& s)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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append(s.get(), s.length());
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}
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template<class Char, class Allocator>
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basic_string<Char,Allocator>& basic_string<Char,Allocator>::_copy_string(const_pointer s, size_type len)
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noexcept(noexcept(this->allocate(0)) &&
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noexcept(this->deallocate(nullptr,0)))
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{
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if(!len)
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return (*this = basic_string(rexy::steal<pointer>(nullptr), 0, 0));
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if(len <= m_length){
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m_length = len;
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memcpy(m_data, s, sizeof(Char)*len);
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m_data[len] = 0;
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return *this;
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}
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return (*this = basic_string(s, len));
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}
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template<class Left, class Right>
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constexpr auto string_cat_expr<Left,Right>::length(void)const noexcept -> size_type{
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return this->m_l.length() + this->m_r.length();
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}
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template<class Left, class Right>
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template<class Alloc>
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string_cat_expr<Left,Right>::operator basic_string<value_type,Alloc>(void)
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noexcept(std::is_nothrow_constructible<basic_string<value_type,Alloc>, typename basic_string<value_type,Alloc>::size_type>::value &&
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std::is_nothrow_invocable<detail::string_appender<basic_string<value_type,Alloc>>,decltype(*this)>::value)
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{
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size_type len = length();
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basic_string<value_type,Alloc> ret(len);
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detail::string_appender<basic_string<value_type,Alloc>> append(ret);
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append(*this);
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return ret;
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}
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template<class Char>
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constexpr static_string<Char>::static_string(const_pointer str, size_type len)noexcept:
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string_base<Char>(const_cast<pointer>(str), len, len){}
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template<class Char>
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constexpr static_string<Char>::static_string(const static_string& s)noexcept:
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string_base<Char>(s.m_data, s.m_length, s.m_length){}
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template<class Char>
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constexpr static_string<Char>::static_string(static_string&& s)noexcept:
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string_base<Char>(s.m_data, s.m_length, s.m_length){}
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template<class Char>
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constexpr static_string<Char>& static_string<Char>::operator=(const static_string& s)noexcept{
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m_data = s.m_data;
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m_length = s.m_length;
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m_cap = s.m_cap;
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return *this;
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}
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template<class Char>
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constexpr static_string<Char>::static_string(const_pointer c)noexcept:
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static_string(c, cx::strlen(c)){}
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template<class Char>
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constexpr static_string<Char>& static_string<Char>::operator=(const_pointer c)noexcept{
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m_data = const_cast<pointer>(c);
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m_length = cx::strlen(c);
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m_cap = m_length;
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return *this;
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}
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template<class Char>
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constexpr static_string<Char>& static_string<Char>::operator=(static_string&& s)noexcept{
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m_data = s.m_data;
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m_length = s.m_length;
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m_cap = s.m_cap;
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return *this;
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}
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extern template class static_string<char>;
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extern template class static_string<wchar_t>;
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extern template class static_string<char16_t>;
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extern template class static_string<char32_t>;
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} //namespace rexy
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#undef STOP_STRICT_ALIAS_WARNING
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#endif
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