using System.IO;

namespace TLang.Common
{
    public abstract class Instruction
    {
        public abstract int CalculateLength();

        public abstract void WriteData(Stream strm);

        
        public const byte ADD = 0x00;
        public const byte SUB = 0x01;
        public const byte TIMES = 0x02;
        public const byte DIVIDE = 0x03;
        public const byte MOD = 0x04;

        public const byte POW = 0x05;

        public const byte LSHIFT = 0x06;
        public const byte RSHIFT = 0x07;
        public const byte BOR = 0x08;
        public const byte BAND = 0x09;
        public const byte XOR = 0x0A;

        public const byte NEG = 0x0B;
        public const byte BNOT = 0x0C;

        public const byte NEQ = 0x10;
        public const byte EQ = 0x11;

        public const byte LOR = 0x12;

        public const byte LAND = 0x13;

        public const byte LNOT = 0x14;

        public const byte LT = 0x15;
        public const byte LTE = 0x16;
        public const byte GT = 0x17;
        public const byte GTE = 0x18;

        public const byte POP = 0xE9;
        
        public const byte SCOPE_BEGIN = 0xEA;
        public const byte SCOPE_END = 0xEB;
        public const byte CALL_FUNC = 0xEC;
        public const byte CALL_METHOD = 0xED;
        public const byte JMP = 0xEE;
        public const byte JMPC = 0xEF;

        public const byte POP_ARRAY_VALUE = 0xF0;
        public const byte PUSH_ARRAY_VALUE = 0xF1;
        
        public const byte POP_FIELD_VALUE = 0xF2;
        public const byte PUSH_FIELD_VALUE = 0xF3;
        public const byte POP_VARIABLE_VALUE = 0xF4;
        public const byte PUSH_VARIABLE_VALUE = 0xF5;
        public const byte PUSH_CHAR = 0xF6;
        public const byte PUSH_FALSE = 0xF7;
        public const byte PUSH_TRUE = 0xF8;
        public const byte PUSH_UNDEFINED = 0xF9;
        public const byte PUSH_NULL = 0xFA;
        public const byte PUSH_CLOSURE = 0xFB;
        public const byte PUSH_STRING = 0xFC;
        public const byte PUSH_DOUBLE = 0xFD;
        public const byte NOP = 0xFE;
        public const byte RET = 0xFF;

        
    }
}