static int32_t ConvertFloatRadixNumToString()

in lib/nxp/utilities/fsl_str.c [626:721]

• 94 lines of code
• 11 McCabe index (conditional complexity)

static int32_t ConvertFloatRadixNumToString(char *numstr, void *nump, int32_t radix, uint32_t precision_width)
{
    int32_t a;
    int32_t b;
    int32_t c;
    int32_t i;
    uint32_t uc;
    double fa;
    double dc;
    double fb;
    double r;
    double fractpart;
    double intpart;

    int32_t nlen;
    char *nstrp;
    nlen     = 0;
    nstrp    = numstr;
    *nstrp++ = '\0';
    r        = *(double *)nump;
    if (!r)
    {
        *nstrp = '0';
        ++nlen;
        return nlen;
    }
    fractpart = modf((double)r, (double *)&intpart);
    /* Process fractional part. */
    for (i = 0; i < precision_width; i++)
    {
        fractpart *= radix;
    }
    if (r >= 0)
    {
        fa = fractpart + (double)0.5;
        if (fa >= pow(10, precision_width))
        {
            intpart++;
        }
    }
    else
    {
        fa = fractpart - (double)0.5;
        if (fa <= -pow(10, precision_width))
        {
            intpart--;
        }
    }
    for (i = 0; i < precision_width; i++)
    {
        fb = fa / (int32_t)radix;
        dc = (fa - (int64_t)fb * (int32_t)radix);
        c  = (int32_t)dc;
        if (c < 0)
        {
            uc = (uint32_t)c;
            c  = (int32_t)(~uc) + 1 + '0';
        }
        else
        {
            c = c + '0';
        }
        fa       = fb;
        *nstrp++ = (char)c;
        ++nlen;
    }
    *nstrp++ = (char)'.';
    ++nlen;
    a = (int32_t)intpart;
    if (a == 0)
    {
        *nstrp++ = '0';
        ++nlen;
    }
    else
    {
        while (a != 0)
        {
            b = (int32_t)a / (int32_t)radix;
            c = (int32_t)a - ((int32_t)b * (int32_t)radix);
            if (c < 0)
            {
                uc = (uint32_t)c;
                c  = (int32_t)(~uc) + 1 + '0';
            }
            else
            {
                c = c + '0';
            }
            a        = b;
            *nstrp++ = (char)c;
            ++nlen;
        }
    }
    return nlen;
}