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Merge pull request #4483 from lioncash/constexpr-hex

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partition_data_manager: Make data arrays constexpr
This commit is contained in:
bunnei 2020-08-06 23:14:14 -04:00 • committed by GitHub
commit f5d538f118
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 133 additions and 130 deletions
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34
src/common/hex_util.cpp
View file

@ -3,21 +3,9 @@
// 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) {
@ -30,26 +18,4 @@ std::vector<u8> HexStringToVector(std::string_view str, bool little_endian) {
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

29
src/common/hex_util.h
View file

@ -14,19 +14,31 @@
namespace Common {
u8 ToHexNibble(char c1);
constexpr u8 ToHexNibble(char c) {
if (c >= 65 && c <= 70) {
return c - 55;
}
if (c >= 97 && c <= 102) {
return c - 87;
}
return c - 48;
}
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) {
constexpr std::array<u8, Size> HexStringToArray(std::string_view str) {
std::array<u8, Size> out{};
if constexpr (le) {
for (std::size_t i = 2 * Size - 2; i <= 2 * Size; i -= 2)
for (std::size_t i = 2 * Size - 2; i <= 2 * Size; i -= 2) {
out[i / 2] = (ToHexNibble(str[i]) << 4) | ToHexNibble(str[i + 1]);
}
} else {
for (std::size_t i = 0; i < 2 * Size; i += 2)
for (std::size_t i = 0; i < 2 * Size; i += 2) {
out[i / 2] = (ToHexNibble(str[i]) << 4) | ToHexNibble(str[i + 1]);
}
}
return out;
}
@ -48,7 +60,12 @@ std::string HexToString(const ContiguousContainer& data, bool upper = true) {
return out;
}
std::array<u8, 0x10> operator"" _array16(const char* str, std::size_t len);
std::array<u8, 0x20> operator"" _array32(const char* str, std::size_t len);
constexpr std::array<u8, 16> AsArray(const char (&data)[17]) {
return HexStringToArray<16>(data);
}
constexpr std::array<u8, 32> AsArray(const char (&data)[65]) {
return HexStringToArray<32>(data);
}
} // namespace Common