satdump/src-core/common/utils.cpp

#include "utils.h"
#include <cmath>
#include <sstream>

void char_array_to_uchar(int8_t *in, uint8_t *out, int nsamples)
{
    for (int i = 0; i < nsamples; i++)
    {
        double r = in[i] * 127.0;
        if (r < 0)
            r = 0;
        else if (r > 255)
            r = 255;
        out[i] = floor(r);
    }
}

void signed_soft_to_unsigned(int8_t *in, uint8_t *out, int nsamples)
{
    for (int i = 0; i < nsamples; i++)
    {
        out[i] = in[i] + 127;

        if (out[i] == 128) // 128 is for erased syms
            out[i] = 127;
    }
}

std::vector<std::string> splitString(std::string input, char del)
{
    std::stringstream stcStream(input);
    std::string seg;
    std::vector<std::string> segs;

    while (std::getline(stcStream, seg, del))
        segs.push_back(seg);

    return segs;
}

// Return filesize
size_t getFilesize(std::string filepath)
{
    std::ifstream file(filepath, std::ios::binary | std::ios::ate);
    std::size_t fileSize = file.tellg();
    file.close();
    return fileSize;
}

bool isStringPresent(std::string searched, std::string keyword)
{
    std::transform(searched.begin(), searched.end(), searched.begin(), tolower);
    std::transform(keyword.begin(), keyword.end(), keyword.begin(), tolower);

    auto found_it = searched.find(keyword, 0);
    return found_it != std::string::npos;
}