/// <summary>
/// 向数组添加添加一个新元素
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public Statement Add(Statement item) {
gItems.Add(item);
return item;
}
//添加指令到程序
private void AddStatement(string szName, string szVar, string szVal, string szNote) {
StatementTypes sType = Statement.GetStatementType(szName);
switch (sType) {
case StatementTypes.NONE:
#region [=====处理空指令=====]
Statement st = new Statement(gBlocks[gBlocks.Count - 1], sType, null, null, szNote);
gBlocks[gBlocks.Count - 1].Statements.Add(st);
break;
#endregion
case StatementTypes.FLAG:
#region [=====处理程序段指令=====]
Block bk = new Block(this, szVar, szVal == "1" ? true : false);
gBlocks.Add(bk);
break;
#endregion
case StatementTypes.DEF:
#region [=====处理字符串预设定指令=====]
if (szVar.StartsWith("[") && szVar.EndsWith("]")) {
if (szVal.StartsWith("\"") && szVal.EndsWith("\"")) {
int nIndex = gMgr.GetIndex(szVar);
if (nIndex < 0) {
Variable.String var = new Variable.String(szVal.Substring(1, szVal.Length - 2));
var.SetName(szVar);
gMgr.Add(var);
} else {
throw new Exception("内部变量" + szVar + "已经存在，DEF指令不可重复定义字符串");
}
} else {
throw new Exception("DEF指令的值必须是字符串");
}
} else {
throw new Exception("DEF指令的变量必须是以\"[\"开头\"]\"结尾的内部变量");
}
break;
#endregion
case StatementTypes.VAR:
#region [=====处理变量定义指令=====]
string szFirstWords = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
string szWords = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
if (szFirstWords.IndexOf(szVar[0].ToString()) < 0) {
throw new Exception("自定义变量首字母必须是英文大小写或下划线\"_\"!");
}
for (int i = 1; i < szVar.Length; i++) {
if (szWords.IndexOf(szVar[i].ToString()) < 0) {
throw new Exception("自定义变量必须是由英文大小写或下划线\"_\"或数字组成!");
}
}
int nVarIndex = gMgr.GetIndex(szVar);
if (nVarIndex < 0) {
switch (szVal.ToLower()) {
case "string":
Variable.String str = new Variable.String();
str.SetName(szVar);
gMgr.Add(str);
break;
case "number":
Variable.Number num = new Variable.Number();
num.SetName(szVar);
gMgr.Add(num);
break;
case "decimal":
Variable.Decimal dec = new Variable.Decimal();
dec.SetName(szVar);
gMgr.Add(dec);
break;
default:
throw new Exception("未知变量类型\"" + szVal + "\"!");
}
} else {
throw new Exception("变量\"" + szVar + "\"已经存在，不可重复定义");
}
break;
#endregion
default:
Variable.Object objVar;
nVarIndex = gMgr.GetIndex(szVar);
if (nVarIndex < 0) {
//寄存器指针变量自动建立
if (szVar.StartsWith("{") && szVar.EndsWith("}")) {
if (szVar == "{}") {
objVar = null;
} else {
objVar = new Variable.Number();
objVar.SetName(szVar);
gMgr.Add(objVar);
}
} else {
throw new Exception("变量\"" + szVar + "\"不存在");
}
} else {
objVar = gMgr[nVarIndex];
}
if (szVal.StartsWith("\"") && szVal.EndsWith("\"")) {
//字符串值
Variable.String str = new Variable.String(szVal.Substring(1, szVal.Length - 2));
gMgr.Add(str);
Statement stNew = new Statement(gBlocks[gBlocks.Count - 1], sType, objVar, str, szNote);
gBlocks[gBlocks.Count - 1].Statements.Add(stNew);
} else {
double dbTemp = 0;
if (double.TryParse(szVal, out dbTemp)) {
//数值
Variable.Decimal dec = new Variable.Decimal(dbTemp);
gMgr.Add(dec);
Statement stNew = new Statement(gBlocks[gBlocks.Count - 1], sType, objVar, dec, szNote);
gBlocks[gBlocks.Count - 1].Statements.Add(stNew);
} else {
int nValIndex = gMgr.GetIndex(szVal);
if (nValIndex >= 0) {
//变量值
Statement stNew = new Statement(gBlocks[gBlocks.Count - 1], sType, objVar, gMgr[nValIndex], szNote);
gBlocks[gBlocks.Count - 1].Statements.Add(stNew);
} else {
throw new Exception("变量\"" + szVal + "\"不存在");
}
}
}
break;
}
}