tdesktop/Telegram/SourceFiles/core/utils.h

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/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#pragma once
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#include "logs.h"
#include "base/basic_types.h"
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#include "base/flags.h"
#include "base/algorithm.h"
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#include "base/assertion.h"
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#include "base/bytes.h"
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#include <crl/crl_time.h>
#include <QtCore/QReadWriteLock>
#include <QtCore/QRegularExpression>
#include <QtNetwork/QNetworkProxy>
#include <cmath>
#include <set>
#define qsl(s) QStringLiteral(s)
namespace base {
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template <typename Value, typename From, typename Till>
inline bool in_range(Value &&value, From &&from, Till &&till) {
return (value >= from) && (value < till);
}
} // namespace base
// using for_const instead of plain range-based for loop to ensure usage of const_iterator
// it is important for the copy-on-write Qt containers
// if you have "QVector<T*> v" then "for (T * const p : v)" will still call QVector::detach(),
// while "for_const (T *p, v)" won't and "for_const (T *&p, v)" won't compile
#define for_const(range_declaration, range_expression) for (range_declaration : std::as_const(range_expression))
static const int32 ScrollMax = INT_MAX;
extern uint64 _SharedMemoryLocation[];
template <typename T, unsigned int N>
T *SharedMemoryLocation() {
static_assert(N < 4, "Only 4 shared memory locations!");
return reinterpret_cast<T*>(_SharedMemoryLocation + N);
}
// see https://github.com/boostcon/cppnow_presentations_2012/blob/master/wed/schurr_cpp11_tools_for_class_authors.pdf
class str_const { // constexpr string
public:
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constexpr str_const(const char *str, std::size_t size)
: _str(str)
, _size(size) {
}
template <std::size_t N>
constexpr str_const(const char(&a)[N]) : str_const(a, N - 1) {
}
constexpr char operator[](std::size_t n) const {
return (n < _size) ? _str[n] :
#ifndef OS_MAC_OLD
throw std::out_of_range("");
#else // OS_MAC_OLD
throw std::exception();
#endif // OS_MAC_OLD
}
constexpr std::size_t size() const { return _size; }
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constexpr const char *c_str() const { return _str; }
private:
const char* const _str;
const std::size_t _size;
};
inline QString str_const_toString(const str_const &str) {
return QString::fromUtf8(str.c_str(), str.size());
}
inline QByteArray str_const_toByteArray(const str_const &str) {
return QByteArray::fromRawData(str.c_str(), str.size());
}
inline void mylocaltime(struct tm * _Tm, const time_t * _Time) {
#ifdef Q_OS_WIN
localtime_s(_Tm, _Time);
#else
localtime_r(_Time, _Tm);
#endif
}
namespace ThirdParty {
void start();
void finish();
} // namespace ThirdParty
const static uint32 _md5_block_size = 64;
class HashMd5 {
public:
HashMd5(const void *input = 0, uint32 length = 0);
void feed(const void *input, uint32 length);
int32 *result();
private:
void init();
void finalize();
void transform(const uchar *block);
bool _finalized;
uchar _buffer[_md5_block_size];
uint32 _count[2];
uint32 _state[4];
uchar _digest[16];
};
int32 *hashSha1(const void *data, uint32 len, void *dest); // dest - ptr to 20 bytes, returns (int32*)dest
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inline std::array<char, 20> hashSha1(const void *data, int size) {
auto result = std::array<char, 20>();
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hashSha1(data, size, result.data());
return result;
}
int32 *hashSha256(const void *data, uint32 len, void *dest); // dest - ptr to 32 bytes, returns (int32*)dest
inline std::array<char, 32> hashSha256(const void *data, int size) {
auto result = std::array<char, 32>();
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hashSha256(data, size, result.data());
return result;
}
int32 *hashMd5(const void *data, uint32 len, void *dest); // dest = ptr to 16 bytes, returns (int32*)dest
inline std::array<char, 16> hashMd5(const void *data, int size) {
auto result = std::array<char, 16>();
hashMd5(data, size, result.data());
return result;
}
char *hashMd5Hex(const int32 *hashmd5, void *dest); // dest = ptr to 32 bytes, returns (char*)dest
inline char *hashMd5Hex(const void *data, uint32 len, void *dest) { // dest = ptr to 32 bytes, returns (char*)dest
return hashMd5Hex(HashMd5(data, len).result(), dest);
}
inline std::array<char, 32> hashMd5Hex(const void *data, int size) {
auto result = std::array<char, 32>();
hashMd5Hex(data, size, result.data());
return result;
}
// good random (using openssl implementation)
void memset_rand(void *data, uint32 len);
template <typename T>
T rand_value() {
T result;
memset_rand(&result, sizeof(result));
return result;
}
template <typename T>
inline T snap(const T &v, const T &_min, const T &_max) {
return (v < _min) ? _min : ((v > _max) ? _max : v);
}
QString translitRusEng(const QString &rus);
QString rusKeyboardLayoutSwitch(const QString &from);
enum DBINotifyView {
dbinvShowPreview = 0,
dbinvShowName = 1,
dbinvShowNothing = 2,
};
enum DBIWorkMode {
dbiwmWindowAndTray = 0,
dbiwmTrayOnly = 1,
dbiwmWindowOnly = 2,
};
static const int MatrixRowShift = 40000;
inline int rowscount(int fullCount, int countPerRow) {
return (fullCount + countPerRow - 1) / countPerRow;
}
inline int floorclamp(int value, int step, int lowest, int highest) {
return qMin(qMax(value / step, lowest), highest);
}
inline int floorclamp(float64 value, int step, int lowest, int highest) {
return qMin(qMax(static_cast<int>(std::floor(value / step)), lowest), highest);
}
inline int ceilclamp(int value, int step, int lowest, int highest) {
return qMax(qMin((value + step - 1) / step, highest), lowest);
}
inline int ceilclamp(float64 value, int32 step, int32 lowest, int32 highest) {
return qMax(qMin(static_cast<int>(std::ceil(value / step)), highest), lowest);
}
static int32 FullArcLength = 360 * 16;
static int32 QuarterArcLength = (FullArcLength / 4);
static int32 MinArcLength = (FullArcLength / 360);
static int32 AlmostFullArcLength = (FullArcLength - MinArcLength);
// This pointer is used for global non-POD variables that are allocated
// on demand by createIfNull(lambda) and are never automatically freed.
template <typename T>
class NeverFreedPointer {
public:
NeverFreedPointer() = default;
NeverFreedPointer(const NeverFreedPointer<T> &other) = delete;
NeverFreedPointer &operator=(const NeverFreedPointer<T> &other) = delete;
template <typename... Args>
void createIfNull(Args&&... args) {
if (isNull()) {
reset(new T(std::forward<Args>(args)...));
}
};
T *data() const {
return _p;
}
T *release() {
return base::take(_p);
}
void reset(T *p = nullptr) {
delete _p;
_p = p;
}
bool isNull() const {
return data() == nullptr;
}
void clear() {
reset();
}
T *operator->() const {
return data();
}
T &operator*() const {
Assert(!isNull());
return *data();
}
explicit operator bool() const {
return !isNull();
}
private:
T *_p;
};
// This pointer is used for static non-POD variables that are allocated
// on first use by constructor and are never automatically freed.
template <typename T>
class StaticNeverFreedPointer {
public:
explicit StaticNeverFreedPointer(T *p) : _p(p) {
}
StaticNeverFreedPointer(const StaticNeverFreedPointer<T> &other) = delete;
StaticNeverFreedPointer &operator=(const StaticNeverFreedPointer<T> &other) = delete;
T *data() const {
return _p;
}
T *release() {
return base::take(_p);
}
void reset(T *p = nullptr) {
delete _p;
_p = p;
}
bool isNull() const {
return data() == nullptr;
}
void clear() {
reset();
}
T *operator->() const {
return data();
}
T &operator*() const {
Assert(!isNull());
return *data();
}
explicit operator bool() const {
return !isNull();
}
private:
T *_p = nullptr;
};