mirror of https://github.com/oxen-io/oxen-core.git
29 lines
1.1 KiB
C++
29 lines
1.1 KiB
C++
#pragma once
|
|
#include <oxenc/hex.h>
|
|
#include <type_traits>
|
|
#include "epee/span.h" // epee
|
|
|
|
namespace tools {
|
|
// Reads a hex string directly into a trivially copyable type T without performing any temporary
|
|
// allocation. Returns false if the given string is not hex or does not match T in length,
|
|
// otherwise copies directly into `x` and returns true.
|
|
template <typename T, typename = std::enable_if_t<
|
|
!std::is_const_v<T> && (std::is_trivially_copyable_v<T> || epee::is_byte_spannable<T>)
|
|
>>
|
|
bool hex_to_type(std::string_view hex, T& x) {
|
|
if (!oxenc::is_hex(hex) || hex.size() != 2*sizeof(T))
|
|
return false;
|
|
oxenc::from_hex(hex.begin(), hex.end(), reinterpret_cast<char*>(&x));
|
|
return true;
|
|
}
|
|
|
|
/// Converts a standard layout, padding-free type into a hex string of its contents.
|
|
template <typename T, typename = std::enable_if_t<
|
|
(std::is_standard_layout_v<T> && std::has_unique_object_representations_v<T>)
|
|
|| epee::is_byte_spannable<T>
|
|
>>
|
|
std::string type_to_hex(const T& val) {
|
|
return oxenc::to_hex(std::string_view{reinterpret_cast<const char*>(&val), sizeof(val)});
|
|
}
|
|
}
|