/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
int Bak = Document.pos;
int BestPos = -1;
Asn1Node Best = null;
Asn1Node Option;
foreach (UserDefinedItem Item in this.options)
{
Document.pos = Bak;
try
{
Option = Item.Parse(Document, Macro);
if (Best is null || Document.pos > BestPos)
{
BestPos = Document.pos;
Best = Option;
}
}
catch (Exception)
{
// Ignore
}
}
if (BestPos < 0)
{
throw Document.SyntaxError("Invalid option.");
}
Document.pos = BestPos;
return(Best);
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
if (Document.namedNodes.TryGetValue(this.identifier, out Asn1Node Node))
{
if (Node is Asn1TypeDefinition TypeDef)
{
return(TypeDef.Definition.Parse(Document, Macro));
}
else if (Node is Asn1Type Type)
{
return(Type.Parse(Document, Macro));
}
else
{
throw Document.SyntaxError("Type reference expected: " + this.identifier);
}
}
foreach (SupportingSyntax Syntax in Macro.SupportingSyntax)
{
if (Syntax.Name == this.identifier)
{
return(Syntax.Parse(Document, Macro));
}
}
throw Document.SyntaxError("Supporting syntax for " + this.identifier + " not found.");
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
Asn1Node Result = null;
foreach (UserDefinedItem Item in this.items)
{
Result = Item.Parse(Document, Macro);
}
return(Result);
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
switch (this.Identifier.ToUpper())
{
case "TYPE": return(Document.ParseType(this.Identifier, false));
case "VALUE": return(Document.ParseValue());
default: return(this.type.Parse(Document, Macro));
}
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
int Bak = Document.pos;
foreach (UserDefinedItem Item in this.options)
{
Document.pos = Bak;
try
{
return(Item.Parse(Document, Macro));
}
catch (Exception)
{
// Ignore
}
}
throw Document.SyntaxError("Invalid option.");
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
if (Macro.Document.namedNodes.TryGetValue(this.identifier, out Asn1Node Node))
{
if (Node is Asn1TypeDefinition TypeDef)
{
return(TypeDef.Definition.Parse(Document, Macro));
}
else if (Node is Asn1Type Type)
{
return(Type.Parse(Document, Macro));
}
else if (Node is Asn1FieldDefinition FieldDef)
{
return(FieldDef.Type.Parse(Document, Macro));
}
else
{
throw Document.SyntaxError("Type reference expected: " + this.identifier);
}
}
if (Macro.supportingSyntax.TryGetValue(this.identifier, out SupportingSyntax Syntax))
{
return(Syntax.Parse(Document, Macro));
}
switch (this.identifier.ToLower())
{
case "empty": return(null);
case "type": return(Document.ParseType(this.Identifier, false));
case "value": return(Document.ParseValue());
default: throw Document.SyntaxError("Supporting syntax for " + this.identifier + " not found.");
}
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
Document.AssertNextToken(this.value);
return(new Values.Asn1StringValue(this.value));
}
/// <summary>
/// Parses the portion of the document at the current position, according to the
/// instructions available in the macro.
/// </summary>
/// <param name="Document">ASN.1 document being parsed.</param>
/// <param name="Macro">Macro being executed.</param>
/// <returns>Parsed ASN.1 node.</returns>
public override Asn1Node Parse(Asn1Document Document, Asn1Macro Macro)
{
return(this.type.Parse(Document, Macro));
}
/// <summary> /// Parses the portion of the document at the current position, according to the /// instructions available in the macro. /// </summary> /// <param name="Document">ASN.1 document being parsed.</param> /// <param name="Macro">Macro being executed.</param> /// <returns>Parsed ASN.1 node.</returns> public abstract Asn1Node Parse(Asn1Document Document, Asn1Macro Macro);
