utils.cpp

/* clang-format off */
/*****************************************************************************
  The MIT License

  Copyright © 2013 Pavel Karelin (hkarel), <hkarel@yandex.ru>

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************/

#include "utils.h"
#include "break_point.h"

#include <cmath>
#include <cstring>
#include <sstream>
#include <stdexcept>

#if defined(_MSC_VER)
//#include <io.h> Нужен ли? Проверить
#include <direct.h>
#include <process.h>
#else
#include <unistd.h>
#endif

namespace utl {

string& ltrim(string& s)
{
    // В С++17 не поддерживается std::ptr_fun
    // s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));

    // Параметр 'c' должен иметь тип 'unsigned char', см. пояснение к функции std::isspace()
    // здесь https://en.cppreference.com/w/cpp/string/byte/isspace
    s.erase(s.begin(), std::find_if_not(s.begin(), s.end(), [](unsigned char c){return std::isspace(c);}));
    return s;
}

string& rtrim(string& s)
{
    // В С++17 не поддерживается std::ptr_fun
    // s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());

    s.erase(std::find_if_not(s.rbegin(), s.rend(), [](unsigned char c){return std::isspace(c);}).base(), s.end());
    return s;
}

string& trim(string& s)
{
    return ltrim(rtrim(s));
}

bool setCurrentDir(char* binaryPath)
{
    bool ret = false;
    char  * x;
    if ((x = strrchr(binaryPath, '/')))
    {
        *x = '\0';
#if defined(_MSC_VER)
        ret = (_chdir(binaryPath) == 0);
#else
        ret = (chdir(binaryPath) == 0);
#endif
        *x = '/';
    }
    return ret;
}

void savePidFile(const string& fileName)
{
    if (!fileName.empty())
    {
        if (FILE * pf = fopen(fileName.c_str(), "w"))
        {
#if defined(_MSC_VER)
            fprintf(pf, "%d\n", _getpid());
#else
            fprintf(pf, "%d\n", getpid());
#endif
            fclose(pf);
        }
        else
            throw logic_error("Can not open pid-file " + fileName + " for writing");
    }
}

#if __cplusplus < 201703L
string toString(short val)
{
    return toString(int(val));
}

string toString(unsigned short val)
{
    return toString(int(val));
}

string toString(int val)
{
    char buff[32]; buff[sizeof(buff) - 1] = '\0';
    snprintf(buff, sizeof(buff) - 1, "%d", val);
    return buff;
}

string toString(unsigned int val)
{
    char buff[32]; buff[sizeof(buff) - 1] = '\0';
    snprintf(buff, sizeof(buff) - 1, "%u", val);
    return buff;
}

string toString(long val)
{
    char buff[32]; buff[sizeof(buff) - 1] = '\0';
    snprintf(buff, sizeof(buff) - 1, "%ld", val);
    return buff;
}

string toString(unsigned long val)
{
    char buff[32]; buff[sizeof(buff) - 1] = '\0';
    snprintf(buff, sizeof(buff) - 1, "%lu", val);
    return buff;
}

string toString(long long val)
{
    char buff[32]; buff[sizeof(buff) - 1] = '\0';
#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)
    snprintf(buff, sizeof(buff) - 1, "%I64d", val);
#else
    snprintf(buff, sizeof(buff) - 1, "%lld", val);
#endif
    return buff;
}

string toString(unsigned long long val)
{
    char buff[32]; buff[sizeof(buff) - 1] = '\0';
#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)
    snprintf(buff, sizeof(buff) - 1, "%I64u", val);
#else
    snprintf(buff, sizeof(buff) - 1, "%llu", val);
#endif
    return buff;
}
#endif // #if __cplusplus < 201703L

static inline uint8_t toHexChar(uint8_t c) noexcept
{
    return (c < 10) ? uint8_t('0' + c) : uint8_t('a' + (c - 10));
}

string uuidToString(const uint8_t uuid[])
{
//    --- Старая реализация ---
//    string buff;
//    buff.reserve(36);
//    for (int i = 0; i < 16; ++i)
//    {
//        buff += toHexChar((uuid[i] >> 4) & 0x0f);
//        buff += toHexChar(uuid[i] & 0x0f);
//        if (i == 3 || i == 5 || i == 7 || i == 9)
//            buff += '-';
//    }
//    return std::move(buff);

    // Отладить
    break_point

    uint8_t buff[40];
    uuidToString(uuid, buff);
    return string((const char*)buff);
}

void uuidToString(const uint8_t uuid[], uint8_t result[])
{
    uint8_t* r = result;
    for (int i = 0; i < 16; ++i)
    {
        (*r++) = toHexChar((uuid[i] >> 4) & 0x0f);
        (*r++) = toHexChar(uuid[i] & 0x0f);
        if (i == 3 || i == 5 || i == 7 || i == 9)
            (*r++) = '-';
    }
    *r = '\0';
}

string uuidToHexString(const uint8_t uuid[], bool addHexPrefix)
{
//    --- Старая реализация ---
//    string buff;
//    if (addHexPrefix)
//    {
//        buff.reserve(34);
//        buff += "0x";
//    }
//    else
//        buff.reserve(32);

//    for (int i = 0; i < 16; ++i)
//    {
//        buff += toHexChar((uuid[i] >> 4) & 0x0f);
//        buff += toHexChar(uuid[i] & 0x0f);
//    }
//    return std::move(buff);

    // Отладить
    break_point

    uint8_t buff[40];
    uuidToHexString(uuid, buff, addHexPrefix);
    return string((const char*)buff);
}

void uuidToHexString(const uint8_t uuid[], uint8_t result[], bool addHexPrefix)
{
    uint8_t* r = result;
    if (addHexPrefix)
    {
        (*r++) = '0';
        (*r++) = 'x';
    }
    for (int i = 0; i < 16; ++i)
    {
        (*r++) = toHexChar((uuid[i] >> 4) & 0x0f);
        (*r++) = toHexChar(uuid[i] & 0x0f);
    }
    *r = '\0';
}

vector<string> split(const string& str, char delim, bool keepEmptyParts)
{
    istringstream stream {str};
    string item;
    vector<string> elems;
    while (std::getline(stream, item, delim))
    {
        if (item.empty() && !keepEmptyParts)
            continue;
        elems.push_back(item);
        item.clear();
    }
    return elems;
}

double round(double number, int signCount)
{
    int n = 1;
    switch (signCount)
    {
        case 0: n = 1;      break;
        case 1: n = 10;     break;
        case 2: n = 100;    break;
        case 3: n = 1000;   break;
        case 4: n = 10000;  break;
        case 5: n = 100000; break;
        default:
            for (int i = 0; i < signCount; ++i)
                n *= 10;
    }
    return std::round(number * n) / n;
}

void timeAdd(const timespec& a, const timespec& b, timespec& result)
{
    // Отладить
    break_point

    result.tv_sec = a.tv_sec + b.tv_sec;
    result.tv_nsec = a.tv_nsec + b.tv_nsec;
    if ((result.tv_nsec) >= 1000000000)
    {
        ++result.tv_sec;
        result.tv_nsec -= 1000000000;
    }
}

void timeSub(const timespec& a, const timespec& b, timespec& result)
{
    // Отладить
    break_point

    result.tv_sec = a.tv_sec - b.tv_sec;
    result.tv_nsec = a.tv_nsec - b.tv_nsec;
    if (result.tv_nsec < 0)
    {
        --result.tv_sec;
        result.tv_nsec += 1000000000;
    }
}

} // namespace utl