選択できるのは25トピックまでです。
トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。
95 行
1.8 KiB
95 行
1.8 KiB
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace SuperBASIC
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{
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enum NumberType{
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Ans,
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Number,
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Operand,
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Memory
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};
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public struct BasicNumber
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{
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internal NumberType type;
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internal Runtime runtime;
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readonly private float number;
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readonly private int operand;
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[Serializable]
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public class BadNumber : Exception
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{
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public BadNumber() { }
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public BadNumber(string message) : base(message) { }
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public BadNumber(string message, Exception inner) : base(message, inner) { }
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protected BadNumber(
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System.Runtime.Serialization.SerializationInfo info,
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System.Runtime.Serialization.StreamingContext context) : base(info, context) { }
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}
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internal BasicNumber(Runtime rt, float v)
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{
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type = NumberType.Number;
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number = v;
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operand = 0;
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runtime = rt;
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}
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internal BasicNumber(Runtime rt)
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{
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type = NumberType.Ans;
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number = 0;
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operand = 0;
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runtime = rt;
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}
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internal BasicNumber(Runtime rt, int v, NumberType reqType = NumberType.Operand)
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{
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if(reqType == NumberType.Operand)
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{
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type = NumberType.Operand;
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number = 0;
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operand = v;
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runtime = rt;
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}
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else
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{
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type = NumberType.Memory;
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number = 0;
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if (v > Int16.MaxValue) throw new BadNumber("Generated out of memory access");
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operand = v;
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runtime = rt;
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}
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}
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internal int GetOperand()
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{
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return operand;
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}
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public float GetValue()
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{
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if (type == NumberType.Number)
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{
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return number;
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}
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else if(type == NumberType.Ans)
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{
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return runtime.GetRegister();
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}
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#if MEMORY
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else
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{
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return Functions.Memory.MemoryGet((short)operand);
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}
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#else
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return 0;
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#endif
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}
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public static implicit operator float(BasicNumber v) => v.GetValue();
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public override string ToString() => $"{GetValue()}";
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}
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}
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