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Copy pathgeneric.cpp
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132 lines (105 loc) · 3.62 KB
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/*
Copyright (C) 2014 Jonathon Ogden < jeog.dev@gmail.com >
This program 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 of the License, or
(at your option) any later version.
This program 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses.
*/
#include "generic.hpp"
/* COPY CONSTRUCT */
TOSDB_Generic::TOSDB_Generic(const TOSDB_Generic& gen)
:
_type_val( gen._type_val )
{
if(gen.is_string())
*(std::string**)_sub = new std::string(**(std::string**)(gen._sub));
else
memcpy(_sub, gen._sub, SUB_SZ);
}
/* MOVE CONSTRUCT */
TOSDB_Generic::TOSDB_Generic(TOSDB_Generic&& gen)
:
_type_val( gen._type_val )
{
/* we are stealing the scalar value OR the string pointer */
memcpy(_sub, gen._sub, SUB_SZ);
/* leave the pointer but set _type_val to VOID to avoid bad free; ptr is an
implementation detail of the moved object that we can safely ignore */
gen._type_val = TYVAL_VOID;
}
/* ASSIGNMENT */
TOSDB_Generic&
TOSDB_Generic::operator=(const TOSDB_Generic& gen)
{
if(*this == gen)
return *this;
if(gen.is_string()){
if(is_string()) /* if we're also a string simply assign */
**(std::string**)_sub = **(std::string**)(gen._sub);
else /* otherwise allocate new */
*(std::string**)_sub = new std::string(**(std::string**)(gen._sub));
}else{
if(is_string())
delete *(std::string**)_sub;
memcpy(_sub, gen._sub, SUB_SZ);
}
_type_val = gen._type_val;
return *this;
}
/* MOVE ASSIGNMENT */
TOSDB_Generic&
TOSDB_Generic::operator=(TOSDB_Generic&& gen)
{
/* not sure if this is optimal or its better to branch(as above) and move
the string object in, allowing gen's destructor to delete
although, this way is a lot cleaner than 2 nested conditionals*/
if(_type_val == TYVAL_STRING)
delete *(std::string**)_sub;
_type_val = gen._type_val;
/* we are stealing the scalar value OR the string pointer */
memcpy(_sub, gen._sub, SUB_SZ);
/* leave the pointer but set _type_val to VOID to avoid bad free; ptr is an
implementation detail of the moved object that we can safely ignore */
gen._type_val = TYVAL_VOID;
return *this;
}
std::string
TOSDB_Generic::as_string() const
{
switch(_type_val){
case(TYVAL_LONG):
case(TYVAL_LONG_LONG):
return std::to_string(*(long long*)_sub);
case(TYVAL_FLOAT):
case(TYVAL_DOUBLE):
return std::to_string(*(double*)_sub);
case(TYVAL_STRING):
return **(std::string**)_sub;
default:
return std::string();
};
}
size_t
TOSDB_Generic::size() const
{
switch(_type_val){
case(TYVAL_LONG):
return sizeof(long);
case(TYVAL_LONG_LONG):
return sizeof(long long);
case(TYVAL_FLOAT):
return sizeof(float);
case(TYVAL_DOUBLE):
return sizeof(double);
case(TYVAL_STRING):
return (*(std::string**)_sub)->size();
default:
return 0;
};
}