using System;
using System.IO;
using TLang.Common;

namespace TLang.BytecodeCompiler
{
    public class PushStringInstruction : Instruction
    {
        public string Value {get;set;}
        public PushStringInstruction(string value)
        {
            Value = value;
        }

        public override int CalculateLength()
        {
            return System.Text.Encoding.UTF8.GetByteCount(Value) + 5;
        }

        public override void WriteData(Stream strm)
        {
            strm.WriteByte(PUSH_STRING);
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(Value);
            var data=BitConverter.GetBytes(bytes.Length);
            if(BitConverter.IsLittleEndian) Array.Reverse(data);
            strm.Write(data,0,data.Length);
            strm.Write(bytes,0,bytes.Length);
        }
    }
}