method

to_s

v1_9_1_378 - Show latest stable - 0 notes - Class: Float

to_s() public

Returns a string containing a representation of self. As well as a fixed or exponential form of the number, the call may return “NaN”, “Infinity”, and “-Infinity”.

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static VALUE
flo_to_s(VALUE flt)
{
    char buf[32];
    double value = RFLOAT_VALUE(flt);
    char *p, *e;

    if (isinf(value))
        return rb_usascii_str_new2(value < 0 ? "-Infinity" : "Infinity");
    else if(isnan(value))
        return rb_usascii_str_new2("NaN");

    snprintf(buf, sizeof(buf), "%#.15g", value); /* ensure to print decimal point */
    if (!(e = strchr(buf, 'e'))) {
        e = buf + strlen(buf);
    }
    if (!ISDIGIT(e[-1])) { /* reformat if ended with decimal point (ex 111111111111111.) */
        snprintf(buf, sizeof(buf), "%#.14e", value);
        if (!(e = strchr(buf, 'e'))) {
            e = buf + strlen(buf);
        }
    }
    p = e;
    while (p[-1]=='0' && ISDIGIT(p[-2]))
        p--;
    memmove(p, e, strlen(e)+1);
    return rb_usascii_str_new2(buf);
}

to_s

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