suyu/src/common/hex_util.cpp
Lioncash a62088539e
common/hex_util: Combine HexVectorToString() and HexArrayToString()
These can be generified together by using a concept type to designate
them. This also has the benefit of not making copies of potentially very
large arrays.
2019-06-12 17:54:05 -04:00

55 lines
1.6 KiB
C++

// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/hex_util.h"
#include "common/logging/log.h"
namespace Common {
u8 ToHexNibble(char c1) {
if (c1 >= 65 && c1 <= 70)
return c1 - 55;
if (c1 >= 97 && c1 <= 102)
return c1 - 87;
if (c1 >= 48 && c1 <= 57)
return c1 - 48;
LOG_ERROR(Common, "Invalid hex digit: 0x{:02X}", 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::array<u8, 16> operator""_array16(const char* str, std::size_t len) {
if (len != 32) {
LOG_ERROR(Common,
"Attempting to parse string to array that is not of correct size (expected=32, "
"actual={}).",
len);
return {};
}
return HexStringToArray<16>(str);
}
std::array<u8, 32> operator""_array32(const char* str, std::size_t len) {
if (len != 64) {
LOG_ERROR(Common,
"Attempting to parse string to array that is not of correct size (expected=64, "
"actual={}).",
len);
return {};
}
return HexStringToArray<32>(str);
}
} // namespace Common