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ImHex/lib/libimhex/include/hex/helpers/utils.hpp
2023-03-13 08:58:08 +01:00

287 lines
8.1 KiB
C++

#pragma once
#include <hex.hpp>
#include <hex/helpers/concepts.hpp>
#include <hex/helpers/fs.hpp>
#include <hex/helpers/intrinsics.hpp>
#include <array>
#include <bit>
#include <cstring>
#include <cctype>
#include <functional>
#include <limits>
#include <memory>
#include <optional>
#include <string>
#include <type_traits>
#include <variant>
#include <vector>
struct ImVec2;
namespace hex {
template<typename T>
std::vector<T> sampleData(const std::vector<T> &data, size_t count) {
size_t stride = std::max(1.0, double(data.size()) / count);
std::vector<T> result;
result.reserve(count);
for (size_t i = 0; i < data.size(); i += stride) {
result.push_back(data[i]);
}
return result;
}
float operator""_scaled(long double value);
float operator""_scaled(unsigned long long value);
ImVec2 scaled(const ImVec2 &vector);
template<typename T>
std::vector<T> operator|(const std::vector<T> &lhs, const std::vector<T> &rhs) {
std::vector<T> result;
std::copy(lhs.begin(), lhs.end(), std::back_inserter(result));
std::copy(rhs.begin(), rhs.end(), std::back_inserter(result));
return result;
}
std::string to_string(u128 value);
std::string to_string(i128 value);
std::optional<u8> parseBinaryString(const std::string &string);
std::string toByteString(u64 bytes);
std::string makePrintable(u8 c);
void runCommand(const std::string &command);
void openWebpage(std::string url);
std::string encodeByteString(const std::vector<u8> &bytes);
std::vector<u8> decodeByteString(const std::string &string);
[[nodiscard]] constexpr inline u64 extract(u8 from, u8 to, const std::unsigned_integral auto &value) {
if (from < to) std::swap(from, to);
using ValueType = std::remove_cvref_t<decltype(value)>;
ValueType mask = (std::numeric_limits<ValueType>::max() >> (((sizeof(value) * 8) - 1) - (from - to))) << to;
return (value & mask) >> to;
}
[[nodiscard]] inline u64 extract(u32 from, u32 to, const std::vector<u8> &bytes) {
u8 index = 0;
while (from > 32 && to > 32) {
from -= 8;
to -= 8;
index++;
}
u64 value = 0;
std::memcpy(&value, &bytes[index], std::min(sizeof(value), bytes.size() - index));
u64 mask = (std::numeric_limits<u64>::max() >> (64 - (from + 1)));
return (value & mask) >> to;
}
constexpr inline i128 signExtend(size_t numBits, i128 value) {
i128 mask = 1ULL << (numBits - 1);
return (value ^ mask) - mask;
}
template<std::integral T>
constexpr inline T swapBitOrder(size_t numBits, T value) {
T result = 0x00;
for (size_t bit = 0; bit < numBits; bit++) {
result <<= 1;
result |= (value & (1 << bit)) != 0;
}
return result;
}
constexpr inline size_t strnlen(const char *s, size_t n) {
size_t i = 0;
while (i < n && s[i] != '\x00') i++;
return i;
}
template<size_t Size>
struct SizeTypeImpl { };
template<>
struct SizeTypeImpl<1> { using Type = u8; };
template<>
struct SizeTypeImpl<2> { using Type = u16; };
template<>
struct SizeTypeImpl<4> { using Type = u32; };
template<>
struct SizeTypeImpl<8> { using Type = u64; };
template<>
struct SizeTypeImpl<16> { using Type = u128; };
template<size_t Size>
using SizeType = typename SizeTypeImpl<Size>::Type;
template<typename T>
constexpr T changeEndianess(const T &value, size_t size, std::endian endian) {
if (endian == std::endian::native)
return value;
size = std::min(size, sizeof(T));
std::array<uint8_t, sizeof(T)> data = { 0 };
std::memcpy(&data[0], &value, size);
for (uint32_t i = 0; i < size / 2; i++) {
std::swap(data[i], data[size - 1 - i]);
}
T result = { };
std::memcpy(&result, &data[0], size);
return result;
}
template<typename T>
constexpr T changeEndianess(const T &value, std::endian endian) {
return changeEndianess(value, sizeof(value), endian);
}
[[nodiscard]] constexpr u128 bitmask(u8 bits) {
return u128(-1) >> (128 - bits);
}
template<class T>
constexpr T bit_width(T x) noexcept {
return std::numeric_limits<T>::digits - std::countl_zero(x);
}
template<typename T>
constexpr T bit_ceil(T x) noexcept {
if (x <= 1u)
return T(1);
return T(1) << bit_width(T(x - 1));
}
template<std::integral T, std::integral U>
auto powi(T base, U exp) {
using ResultType = decltype(T{} * U{});
if (exp < 0)
return ResultType(0);
ResultType result = 1;
while (exp != 0) {
if ((exp & 0b1) == 0b1)
result *= base;
exp >>= 1;
base *= base;
}
return result;
}
template<typename T, typename... Args>
void moveToVector(std::vector<T> &buffer, T &&first, Args &&...rest) {
buffer.push_back(std::move(first));
if constexpr (sizeof...(rest) > 0)
moveToVector(buffer, std::move(rest)...);
}
template<typename T, typename... Args>
std::vector<T> moveToVector(T &&first, Args &&...rest) {
std::vector<T> result;
moveToVector(result, T(std::move(first)), std::move(rest)...);
return result;
}
std::vector<std::string> splitString(const std::string &string, const std::string &delimiter);
std::string combineStrings(const std::vector<std::string> &strings, const std::string &delimiter = "");
std::string replaceStrings(std::string string, const std::string &search, const std::string &replace);
std::string toEngineeringString(double value);
inline std::vector<u8> parseByteString(const std::string &string) {
auto byteString = std::string(string);
byteString.erase(std::remove(byteString.begin(), byteString.end(), ' '), byteString.end());
if ((byteString.length() % 2) != 0) return {};
std::vector<u8> result;
for (u32 i = 0; i < byteString.length(); i += 2) {
if (!std::isxdigit(byteString[i]) || !std::isxdigit(byteString[i + 1]))
return {};
result.push_back(std::strtoul(byteString.substr(i, 2).c_str(), nullptr, 16));
}
return result;
}
inline std::string toBinaryString(std::unsigned_integral auto number) {
if (number == 0) return "0";
std::string result;
for (i16 bit = hex::bit_width(number) - 1; bit >= 0; bit--)
result += (number & (0b1 << bit)) == 0 ? '0' : '1';
return result;
}
float float16ToFloat32(u16 float16);
inline bool equalsIgnoreCase(const std::string &left, const std::string &right) {
return std::equal(left.begin(), left.end(), right.begin(), right.end(), [](char a, char b) {
return tolower(a) == tolower(b);
});
}
inline bool containsIgnoreCase(const std::string &a, const std::string &b) {
auto iter = std::search(a.begin(), a.end(), b.begin(), b.end(), [](char ch1, char ch2) {
return std::toupper(ch1) == std::toupper(ch2);
});
return iter != a.end();
}
template<typename T, typename... VariantTypes>
T get_or(const std::variant<VariantTypes...> &variant, T alt) {
const T *value = std::get_if<T>(&variant);
if (value == nullptr)
return alt;
else
return *value;
}
template<std::integral T>
T alignTo(T value, T alignment) {
T remainder = value % alignment;
return remainder != 0 ? value + (alignment - remainder) : value;
}
std::optional<u8> hexCharToValue(char c);
bool isProcessElevated();
std::optional<std::string> getEnvironmentVariable(const std::string &env);
inline std::string limitStringLength(const std::string &string, size_t maxLength) {
if (string.length() <= maxLength)
return string;
return string.substr(0, maxLength - 3) + "...";
}
}