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hex_util: Add HexVectorToString and HexStringToVector 

Converts between bytes and strings when the size is not known at compile time.
This commit is contained in:
Zach Hilman 2018-09-30 18:13:02 -04:00
parent f85f2b3728
commit f62227aa95
2 changed files with 24 additions and 0 deletions
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19
src/common/hex_util.cpp
View File

@ -18,6 +18,25 @@ u8 ToHexNibble(char c1) {
return 0;
}
std::vector<u8> HexStringToVector(std::string_view str, bool little_endian) {
std::vector<u8> out(str.size() / 2);
if (little_endian) {
for (std::size_t i = str.size() - 2; i <= str.size(); i -= 2)
out[i / 2] = (ToHexNibble(str[i]) << 4) | ToHexNibble(str[i + 1]);
} else {
for (std::size_t i = 0; i < str.size(); i += 2)
out[i / 2] = (ToHexNibble(str[i]) << 4) | ToHexNibble(str[i + 1]);
}
return out;
}
std::string HexVectorToString(std::vector<u8> vector, bool upper) {
std::string out;
for (u8 c : vector)
out += fmt::format(upper ? "{:02X}" : "{:02x}", c);
return out;
}
std::array<u8, 16> operator""_array16(const char* str, std::size_t len) {
if (len != 32) {
LOG_ERROR(Common,

5
src/common/hex_util.h
View File

@ -7,6 +7,7 @@
#include <array>
#include <cstddef>
#include <string>
#include <vector>
#include <fmt/format.h>
#include "common/common_types.h"
@ -14,6 +15,8 @@ namespace Common {
u8 ToHexNibble(char c1);
std::vector<u8> HexStringToVector(std::string_view str, bool little_endian);
template <std::size_t Size, bool le = false>
std::array<u8, Size> HexStringToArray(std::string_view str) {
std::array<u8, Size> out{};
@ -27,6 +30,8 @@ std::array<u8, Size> HexStringToArray(std::string_view str) {
return out;
}
std::string HexVectorToString(std::vector<u8> vector, bool upper = true);
template <std::size_t Size>
std::string HexArrayToString(std::array<u8, Size> array, bool upper = true) {
std::string out;