scalar.nct

//! Private decimal spelling authority for built-in integers.

use /string.String

func try_format_signed(output: &+String, value: i64): void! {
    if value == -9223372036854775808 {
        output.try_push_str("-9223372036854775808")?
        return
    }
    if value < 0 {
        output.try_push_str("-")?
        let magnitude: i64 = 0 - value
        try_format_signed_magnitude(output, magnitude)?
        return
    }
    try_format_signed_magnitude(output, value)?
    return
}

func try_format_signed_magnitude(output: &+String, value: i64): void! {
    if value >= 10 {
        try_format_signed_magnitude(output, value / 10)?
    }
    try_format_signed_digit(output, value % 10)?
    return
}

func try_format_unsigned(output: &+String, value: u64): void! {
    if value >= 10 {
        try_format_unsigned(output, value / 10)?
    }
    try_format_digit(output, value % 10)?
    return
}

func try_format_digit(output: &+String, value: u64): void! {
    if value == 0 {
        output.try_push_str("0")?
        return
    }
    if value == 1 {
        output.try_push_str("1")?
        return
    }
    if value == 2 {
        output.try_push_str("2")?
        return
    }
    if value == 3 {
        output.try_push_str("3")?
        return
    }
    if value == 4 {
        output.try_push_str("4")?
        return
    }
    if value == 5 {
        output.try_push_str("5")?
        return
    }
    if value == 6 {
        output.try_push_str("6")?
        return
    }
    if value == 7 {
        output.try_push_str("7")?
        return
    }
    if value == 8 {
        output.try_push_str("8")?
        return
    }
    output.try_push_str("9")?
    return
}

func try_format_signed_digit(output: &+String, value: i64): void! {
    if value == 0 {
        output.try_push_str("0")?
        return
    }
    if value == 1 {
        output.try_push_str("1")?
        return
    }
    if value == 2 {
        output.try_push_str("2")?
        return
    }
    if value == 3 {
        output.try_push_str("3")?
        return
    }
    if value == 4 {
        output.try_push_str("4")?
        return
    }
    if value == 5 {
        output.try_push_str("5")?
        return
    }
    if value == 6 {
        output.try_push_str("6")?
        return
    }
    if value == 7 {
        output.try_push_str("7")?
        return
    }
    if value == 8 {
        output.try_push_str("8")?
        return
    }
    output.try_push_str("9")?
    return
}