/// <summary>
/// 向表中插入一条
/// </summary>
/// <param name="item"></param>
public void Add(VariableItem item)
{
table.Add(item);
}
/// <summary>
/// 根据临时文件分析，并且填表
/// 0 执行成功
/// -1 临时文件不存在
/// -2 遇到非法字符
/// -3 长度超过限值
/// </summary>
public int Analize()
{
if (fileInfo.Exists)
{
StreamReader readTempFile = new StreamReader(this.fileInfo.FullName);
while (!readTempFile.EndOfStream)
{
string lineString = readTempFile.ReadLine();
char[] lineChars = lineString.ToCharArray();
int currentLineNumber = 1; //原文本行号
int currentIndex = -1; //当前索引位置
int endIndex = 0; //检索到一个标识符结束位置
while (++currentIndex < lineChars.Length)
{
if (lineChars[currentIndex] == '#')
{
endIndex = this.TryGetLineNumber(lineChars, currentIndex);
if (endIndex == -2)
{
System.Console.WriteLine("非法符号#,该符号系统保留，位置第" + currentLineNumber + "行附近");
readTempFile.Close();
fileInfo.Delete();
return(-3);
}
currentLineNumber = int.Parse(lineString.Substring(currentIndex + 1, endIndex - currentIndex - 1));
currentIndex = endIndex;
}
else if (isNumber(lineChars[currentIndex]))
{
endIndex = this.TryGetNumber(lineChars, currentIndex);
if (endIndex == -2)
{
System.Console.WriteLine("数字的长度超过限制" + ConstTable.NumberMaxLength + "，位置第" + currentLineNumber + "行");
readTempFile.Close();
fileInfo.Delete();
return(-3);
}
VariableItem numberItem = new VariableItem(ConstTable.VariableType.Number, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(numberItem);
currentIndex = endIndex;
}
else if (this.isLetter(lineChars[currentIndex]) || lineChars[currentIndex] == '_')
{
endIndex = this.TryGetIdentifier(lineChars, currentIndex);
if (endIndex == -2)
{
System.Console.WriteLine("标识符的长度超过限制" + ConstTable.IdentifyMaxLength + "，位置第" + currentLineNumber + "行");
readTempFile.Close();
fileInfo.Delete();
return(-3);
}
if (isReserve(lineString.Substring(currentIndex, endIndex - currentIndex + 1)))
{
VariableItem reserveItem = new VariableItem(ConstTable.VariableType.Reverse, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(reserveItem);
}
else
{
VariableItem idItem = new VariableItem(ConstTable.VariableType.Identity, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(idItem);
}
currentIndex = endIndex;
}
else if (this.isSingleOperator(lineChars[currentIndex]))
{
endIndex = currentIndex;
VariableItem singleOpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(singleOpeItem);
}
else if (lineChars[currentIndex] == '>')
{
endIndex = this.TryGetGreaterEqual(lineChars, currentIndex);
if (endIndex == -1)
{
endIndex = currentIndex;
VariableItem OpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(OpeItem);
}
else
{
VariableItem OpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(OpeItem);
currentIndex = endIndex;
}
}
else if (lineChars[currentIndex] == '<')
{
endIndex = this.TryGetSmallerEqual(lineChars, currentIndex);
if (endIndex != -1)
{
VariableItem OpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(OpeItem);
currentIndex = endIndex;
}
else
{
endIndex = this.TryGetNotEqual(lineChars, currentIndex);
if (endIndex != -1)
{
VariableItem OpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(OpeItem);
currentIndex = endIndex;
}
else
{
endIndex = currentIndex;
VariableItem OpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(OpeItem);
}
}
}
else if (lineChars[currentIndex] == ':')
{
endIndex = currentIndex + 1;
if (lineChars[endIndex] == '=')
{
VariableItem OpeItem = new VariableItem(ConstTable.VariableType.Operation, lineString.Substring(currentIndex, endIndex - currentIndex + 1), currentLineNumber);
varTable.Add(OpeItem);
currentIndex = endIndex;
}
else
{
System.Console.WriteLine("赋值号不完整，位置第" + currentLineNumber + "行");
readTempFile.Close();
fileInfo.Delete();
return(-2);
}
}
else if (lineChars[currentIndex] == ' ' || lineChars[currentIndex] == '\t' || lineChars[currentIndex] == '\n')
{
}
else
{
System.Console.WriteLine("遇到非法字符" + lineChars[currentIndex] + "，错误位置第" + currentLineNumber + "行");
readTempFile.Close();
fileInfo.Delete();
return(-2);
}
}
}
readTempFile.Close();
return(0);
}
else
{
System.Console.WriteLine("分析时临时文件不存在！");
return(-1);
}
}
