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openrw/rwcore/rw/casts.hpp
2018-09-15 23:39:46 +02:00

45 lines
1.1 KiB
C++

#ifndef _LIBRW_CASTS_HPP_
#define _LIBRW_CASTS_HPP_
#include <cstring> // memcpy
#include <string>
#include "rw/debug.hpp"
//Based on https://gist.github.com/socantre/3472964
template <class Dest, class Source>
inline Dest bit_cast(Source const &source) {
Dest dest;
std::memcpy(&dest, &source, sizeof(Dest));
return dest;
}
template <class T, class S>
inline T lexical_cast(const S& s);
template <class T, class S>
inline T lexical_cast(const S& s, int base);
template <>
inline int lexical_cast(const std::string& source, int base) {
char* end = nullptr; //for errors handling
int result = std::strtol(source.c_str(), &end, base);
RW_CHECK(end != source.c_str(), "Problem with conversion " << *end << " to int");
return result;
}
template <>
inline int lexical_cast(const std::string& source) {
return lexical_cast<int>(source, 10);
}
template <>
inline float lexical_cast(const std::string& source) {
char* end = nullptr; //for errors handling
float result = std::strtof(source.c_str(), &end);
RW_CHECK(end != source.c_str(), "Problem with conversion " << *end << " to float");
return result;
}
#endif