/// <summary>
/// Construtor padrão.
/// </summary>
/// <param name="id">Identificador do container.</param>
/// <param name="beginPoint">Posição inicial do container.</param>
/// <param name="containerChars">Caracters do container.</param>
/// <param name="line">Linha onde o container está inserido.</param>
public ExpressionContainer(int id, int beginPoint, ContainerChars containerChars, ExpressionLine line)
{
_id = id;
_beginPoint = beginPoint;
_containerChars = containerChars;
_line = line;
}
/// <summary>
/// Cria uma nova expressão define um char como texto.
/// </summary>
/// <param name="container"></param>
/// <param name="beginPoint"></param>
/// <param name="line"></param>
/// <param name="command"></param>
public Expression(ExpressionContainer container, int beginPoint, ExpressionLine line, char command)
{
_container = container;
_beginPoint = beginPoint;
_line = line;
_line.Expressions.Add(this);
_length = 1;
_text = new string(command, 1);
}
/// <summary>
/// Cria uma nova expressão recuperando do comando o segmento de texto e definindo o identificador do token.
/// </summary>
/// <param name="container"></param>
/// <param name="beginPoint"></param>
/// <param name="length"></param>
/// <param name="line"></param>
/// <param name="command"></param>
/// <param name="tokenID"></param>
public Expression(ExpressionContainer container, int beginPoint, int length, ExpressionLine line, string command, int tokenID)
{
_container = container;
_beginPoint = beginPoint;
_length = length;
_line = line;
_line.Expressions.Add(this);
_text = command.Substring(beginPoint, length);
_token = tokenID;
}
/// <summary>
/// Cria uma nova expressão com o texto informado.
/// </summary>
/// <param name="container"></param>
/// <param name="beginPoint"></param>
/// <param name="line"></param>
/// <param name="text"></param>
public Expression(ExpressionContainer container, int beginPoint, ExpressionLine line, string text)
{
_container = container;
_beginPoint = beginPoint;
_length = text == null ? 0 : text.Length;
_line = line;
_line.Expressions.Add(this);
_text = text;
_token = (int)TokenID.Identifier;
}
/// <summary>
/// Construtor padrão.
/// </summary>
/// <param name="container">Container da expressão.</param>
/// <param name="beginPoint"></param>
/// <param name="length"></param>
/// <param name="line"></param>
/// <param name="command"></param>
/// <param name="containerChar"></param>
public SpecialContainerExpression(ExpressionContainer container, int beginPoint, int length, ExpressionLine line, string command, char containerChar) : base(container, beginPoint, length, line, command)
{
Token = (int)TokenID.StringLiteral;
_containerChar = containerChar;
}
/// <summary>
/// Executa a análise lexa no comando.
/// </summary>
/// <param name="text">Texto que será analizado.</param>
/// <returns></returns>
public LexerResult Execute(string text)
{
var lines = new List <ExpressionLine>();
var expressions = new List <Expression>();
Stack <ExpressionContainer> containersStack = new Stack <ExpressionContainer>();
var containerId = 1;
var containers = new List <ExpressionContainer>();
int beginPos = 0;
int pos = 0;
State state = State.S0;
char usingSpecialContainerChar = TokenParser.GetCharacter((int)TokenID.Quote);
ExpressionLine lastLine = new ExpressionLine(pos);
char current = char.MinValue;
int currentToken = (int)TokenID.InvalidExpression;
lines.Add(lastLine);
bool end = false;
while (!end || (pos == text.Length && (state == State.S8 || state == State.S3 || state == State.S2)))
{
current = pos == text.Length ? text[pos - 1] : text[pos];
currentToken = TokenParser.Parse(current);
switch (state)
{
case State.S0:
if (Array.Exists <char>(Configuration.Spaces, f => f == current))
{
state = State.S0;
if (currentToken == (int)TokenID.Newline)
{
lastLine.Length = pos - lastLine.BeginPoint;
lastLine = new ExpressionLine(pos);
lines.Add(lastLine);
}
else
{
}
beginPos = pos + 1;
}
else if (Array.Exists <ContainerChars>(Configuration.StringContainers, f => f.Start == current))
{
beginPos = pos + 1;
usingSpecialContainerChar = Array.Find <ContainerChars>(Configuration.StringContainers, f => f.Start == current).Stop;
state = State.S1;
}
else if (Array.Exists <char>(Configuration.Tabs, f => f == current))
{
beginPos = pos;
state = State.S2;
}
else if (Configuration.IsAlpha(text[pos]))
{
state = State.S3;
}
else if (char.IsDigit(text[pos]))
{
state = State.S8;
}
else if (Array.Exists <ContainerChars>(Configuration.Containers, f => f.Start == current))
{
Expression e = new Expression(containersStack.Count > 0 ? containersStack.Peek() : null, pos, lastLine, text[pos]);
e.Token = currentToken;
var containerChars = Array.Find(Configuration.Containers, f => f.Start == current).Clone();
expressions.Add(e);
containersStack.Push(new ExpressionContainer(containerId++, pos + 1, containerChars, lastLine));
beginPos = pos + 1;
state = State.S0;
}
else if (Array.Exists <ContainerChars>(Configuration.Containers, f => f.Stop == current))
{
if (containersStack.Count == 0)
{
throw new LexerException(String.Format("Not open tag for caracter {0}. Line: {1} - Col: {2}.", text[pos], lines.Count, pos - lastLine.BeginPoint));
}
else if (containersStack.Peek().ContainerChars.Stop == text[pos])
{
var ce = containersStack.Pop();
ce.Length = pos - ce.BeginPoint;
containers.Add(ce);
Expression e = new Expression(containersStack.Count > 0 ? containersStack.Peek() : null, pos, lastLine, text[pos]);
e.Token = currentToken;
expressions.Add(e);
if (containersStack.Count == 0)
{
}
beginPos = pos + 1;
state = State.S0;
}
else
{
throw new LexerException(String.Format("Expected caracter {0}. Line: {1} - Col: {2}.", containersStack.Peek().ContainerChars.Stop, lines.Count, pos - lastLine.BeginPoint));
}
}
else
{
throw new LexerException(String.Format("Invalid caracter '{0}' in expression context.", text[pos]));
}
break;
case State.S1:
if (current == usingSpecialContainerChar)
{
if (!Configuration.SupportASCIIChar || ((pos > 0 && TokenParser.Parse(text[pos - 1]) != Configuration.ASCIICharPrefix) || (pos > 1 && TokenParser.Parse(text[pos - 2]) == Configuration.ASCIICharPrefix)))
{
var specialToken = TokenParser.Parse(usingSpecialContainerChar);
if (specialToken == (int)TokenID.RBracket || specialToken == (int)TokenID.BSQuote)
{
Expression e = new Expression(containersStack.Count > 0 ? containersStack.Peek() : null, beginPos, pos - beginPos, lastLine, text, (int)TokenID.Identifier);
e.CurrentSpecialContainer = new ContainerChars(text[beginPos - 1], text[pos]);
expressions.Add(e);
}
else
{
SpecialContainerExpression sce = new SpecialContainerExpression(containersStack.Count > 0 ? containersStack.Peek() : null, beginPos, pos - beginPos, lastLine, text, usingSpecialContainerChar);
expressions.Add(sce);
sce.ContainerToken = specialToken;
}
beginPos = pos + 1;
state = State.S0;
}
}
break;
case State.S2:
if (text[pos - 1] == TokenParser.GetCharacter((int)TokenID.Minus) && char.IsDigit(text[pos]))
{
if (text.Length < 2 || (text.Length > 2 && Array.IndexOf <char>(Configuration.Tabs, text[pos - 2]) >= 0) || (text.Length > 2 && Array.IndexOf <char>(Configuration.Spaces, text[pos - 2]) != -1) || (text.Length > 2 && Configuration.Containers.Any(f => f.Start == text[pos - 2])))
{
state = State.S8;
continue;
}
}
int joinTokenID;
if (!end)
{
joinTokenID = TokenParser.Parse(text[pos - 1].ToString() + text[pos].ToString());
}
else
{
joinTokenID = TokenParser.Parse(text[pos - 1].ToString());
}
if (Array.Exists <int>(Configuration.ExpressionJoinsTokenIDs, f => f == joinTokenID))
{
Expression e = new Expression(containersStack.Count > 0 ? containersStack.Peek() : null, beginPos, 2, lastLine, text);
e.Token = TokenParser.Parse(e.Text);
if (e.Token == (int)TokenID.InvalidExpression)
{
e.Token = (int)TokenID.InvalidTab;
}
expressions.Add(e);
beginPos = pos + 1;
state = State.S0;
}
else
{
TabExpression te = new TabExpression(containersStack.Count > 0 ? containersStack.Peek() : null, beginPos, lastLine, text);
te.Token = TokenParser.Parse(text[beginPos]);
expressions.Add(te);
beginPos = pos;
pos--;
state = State.S0;
}
break;
case State.S3:
if (pos == text.Length || !Configuration.IsAlphanumeric(text[pos]))
{
Expression e = new Expression(containersStack.Count > 0 ? containersStack.Peek() : null, beginPos, pos - beginPos, lastLine, text);
if (char.IsDigit(e.Text[0]) || e.Text[0] == '-')
{
if (e.Text.Length > 2 && (e.Text[1] == 'x' || e.Text[1] == 'X') && System.Text.RegularExpressions.Regex.IsMatch(e.Text.Substring(2), "[0-9]"))
{
e.Token = (int)TokenID.HexLiteral;
}
else if (System.Text.RegularExpressions.Regex.IsMatch(e.Text, "^([-]|[0-9])[0-9]*$"))
{
e.Token = (int)TokenID.IntLiteral;
}
else if (System.Text.RegularExpressions.Regex.IsMatch(e.Text, "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$"))
{
e.Token = (int)TokenID.RealLiteral;
}
var aux = _tokenParser.Parse(e.Text.ToLower());
if (aux == (int)TokenID.InvalidExpression)
{
e.Token = (int)TokenID.Identifier;
}
else
{
e.Token = aux;
}
}
else if (_keywords.ContainsKey(e.Text.ToLower()))
{
e.Token = _keywords[e.Text.ToLower()];
}
else
{
var aux = _tokenParser.Parse(e.Text.ToLower());
if (aux == (int)TokenID.InvalidExpression)
{
e.Token = (int)TokenID.Identifier;
}
else
{
e.Token = aux;
}
}
expressions.Add(e);
beginPos = pos;
pos--;
state = State.S0;
}
break;
case State.S8:
if (pos == text.Length || !Configuration.IsNumeric(text[pos]))
{
Expression e = new Expression(containersStack.Count > 0 ? containersStack.Peek() : null, beginPos, pos - beginPos, lastLine, text);
if (e.Text.Length > 2 && (e.Text[1] == 'x' || e.Text[1] == 'X') && System.Text.RegularExpressions.Regex.IsMatch(e.Text.Substring(2), "[0-9]"))
{
e.Token = (int)TokenID.HexLiteral;
}
else if (System.Text.RegularExpressions.Regex.IsMatch(e.Text, "[0-9]"))
{
e.Token = (int)TokenID.IntLiteral;
}
else if (System.Text.RegularExpressions.Regex.IsMatch(e.Text, "^([-]|[.]|[-.]|[0-9])[0-9]*[.]*[0-9]+$"))
{
e.Token = (int)TokenID.RealLiteral;
}
else
{
throw new LexerException("Expected number or hexadecimal.");
}
expressions.Add(e);
beginPos = pos;
pos--;
state = State.S0;
}
break;
}
pos++;
end = (pos == text.Length);
}
lastLine.Length = pos - lastLine.BeginPoint;
if (state != State.S0)
{
throw new LexerException("Invalid expression.");
}
if (containersStack.Count > 0)
{
throw new LexerException(String.Format("{0} expected. Line: {1} - Col: {2} -- opened in Line: {3} - Col: {4}", containersStack.Peek().ContainerChars.Stop, lines.Count, lastLine.Length, containersStack.Peek().Line.BeginPoint, containersStack.Peek().BeginPoint));
}
return(new LexerResult(text, expressions, lines, containers));
}
public TabExpression(ExpressionContainer container, int beginPoint, ExpressionLine line, string command) : base(container, beginPoint, 1, line, command)
{
}