Function SDL_PrintFloat

deps/SDL2/src/stdlib/SDL_string.c:1542–1643

}

static size_t
SDL_PrintFloat(char *text, size_t maxlen, SDL_FormatInfo *info, double arg)
{
    int width;
    size_t len;
    size_t left = maxlen;
    char *textstart = text;

    if (arg) {
        /* This isn't especially accurate, but hey, it's easy. :) */
        unsigned long value;

        if (arg < 0) {
            if (left > 1) {
                *text = '-';
                --left;
            }
            ++text;
            arg = -arg;
        } else if (info->force_sign) {
            if (left > 1) {
                *text = '+';
                --left;
            }
            ++text;
        }
        value = (unsigned long) arg;
        len = SDL_PrintUnsignedLong(text, left, NULL, value);
        if (len >= left) {
            text += (left > 1) ? left - 1 : 0;
            left = SDL_min(left, 1);
        } else {
            text += len;
            left -= len;
        }
        arg -= value;
        if (info->precision < 0) {
            info->precision = 6;
        }
        if (info->force_type || info->precision > 0) {
            int mult = 10;
            if (left > 1) {
                *text = '.';
                --left;
            }
            ++text;
            while (info->precision-- > 0) {
                value = (unsigned long) (arg * mult);
                len = SDL_PrintUnsignedLong(text, left, NULL, value);
                if (len >= left) {
                    text += (left > 1) ? left - 1 : 0;
                    left = SDL_min(left, 1);
                } else {
                    text += len;
                    left -= len;
                }
                arg -= (double) value / mult;
                mult *= 10;