wasm-lang/test/itoa

fn itoa(number: i32) -> i32 {
	let count: i32 = 0;
	let is_negative = number < 0;

    if is_negative {
        number = -number;
    }

    loop {
        let ch = (number % 10) + 0x30;
        store_i32_8(count + 8, ch);

        number = number / 10;
        count = count + 1;

        if number == 0 {
            break;
        }
    }

    if is_negative {
        store_i32_8(count + 8, 45);
        count = count + 1;
    }
    
	let i: i32 = 0;
	loop {
        let swap_to = count - i + 7;
        let swap_from = i + 8;

        let tmp = load_i32_8(swap_to);
        store_i32_8(swap_to, load_i32_8(swap_from));
        store_i32_8(swap_from, tmp);

        i = i + 1;
        if i >= count / 2 {
           break;
        }
	}

    count
}