public ImportsFrom(Symbol last, ISymbolEnumerator symbols)
{
Symbol previous = last;
Symbol current;
while ((current = symbols.NextSymbol()) != Symbol.From)
{
if (current == Symbol.EOL)
{
continue;
}
if (current == Symbol.Comma)
{
previous.AssertIsValidIdentifier();
_types.Add(previous.ToString());
}
previous = current;
}
previous.AssertIsValidIdentifier();
_types.Add(previous.ToString());
_module = symbols.NextSymbol().ToString().ToUpperInvariant(); // module names are uppercase
}
public ImportsFrom(Symbol last, ISymbolEnumerator symbols)
{
Symbol previous = last;
Symbol current;
while ((current = symbols.NextSymbol()) != Symbol.From)
{
if (current == Symbol.EOL)
{
continue;
}
if (current == Symbol.Comma)
{
previous.AssertIsValidIdentifier();
_types.Add(previous.ToString());
}
previous = current;
}
previous.AssertIsValidIdentifier();
_types.Add(previous.ToString());
_module = symbols.NextSymbol().ToString().ToUpperInvariant(); // module names are uppercase
}
/// <summary>
/// Creates an <see cref="Imports"/> instance.
/// </summary>
/// <param name="lexer"></param>
public Imports(IModule module, ISymbolEnumerator symbols)
{
_module = module;
Symbol current;
while ((current = symbols.NextSymbol()) != Symbol.Semicolon)
{
if (current == Symbol.EOL)
{
continue;
}
ImportsFrom imports = new ImportsFrom(current, symbols);
this.Add(imports);
}
}
private void ParseEntities(ISymbolEnumerator symbols)
{
Symbol temp = symbols.NextNonEOLSymbol();
SymbolList buffer = new SymbolList();
while (temp != Symbol.End)
{
if (temp == Symbol.Assign)
{
ParseEntity(buffer, symbols);
buffer.Clear();
// skip linebreaks behind an entity
temp = symbols.NextNonEOLSymbol();
}
else
{
buffer.Add(temp);
temp = symbols.NextSymbol();
}
}
}
public MibModule(ISymbolEnumerator symbols)
{
if (symbols == null)
{
throw new ArgumentNullException("lexer");
}
Symbol temp = symbols.NextNonEOLSymbol();
temp.AssertIsValidIdentifier();
_name = temp.ToString().ToUpperInvariant(); // all module names are uppercase
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Definitions);
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Assign);
temp = symbols.NextSymbol();
temp.Expect(Symbol.Begin);
temp = symbols.NextNonEOLSymbol();
if (temp == Symbol.Imports)
{
_imports = ParseDependents(symbols);
}
else if (temp == Symbol.Exports)
{
_exports = ParseExports(symbols);
}
else
{
symbols.PutBack(temp);
}
ParseEntities(symbols);
}
public Exports(IModule module, ISymbolEnumerator s)
{
_module = module;
Symbol previous = null;
Symbol current;
do
{
current = s.NextSymbol();
if (current == Symbol.EOL)
{
continue;
}
else if (((current == Symbol.Comma) || (current == Symbol.Semicolon)) && (previous != null))
{
previous.AssertIsValidIdentifier();
_types.Add(previous.ToString());
}
previous = current;
}while (current != Symbol.Semicolon);
}
public MibModule(ISymbolEnumerator symbols)
{
if (symbols == null)
{
throw new ArgumentNullException("lexer");
}
Symbol temp = symbols.NextNonEOLSymbol();
temp.AssertIsValidIdentifier();
_name = temp.ToString().ToUpperInvariant(); // all module names are uppercase
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Definitions);
temp = symbols.NextNonEOLSymbol();
temp.Expect(Symbol.Assign);
temp = symbols.NextSymbol();
temp.Expect(Symbol.Begin);
temp = symbols.NextNonEOLSymbol();
if (temp == Symbol.Imports)
{
_imports = ParseDependents(symbols);
}
else if (temp == Symbol.Exports)
{
_exports = ParseExports(symbols);
}
else
{
symbols.PutBack(temp);
}
ParseEntities(symbols);
}
public Exports(IModule module, ISymbolEnumerator s)
{
_module = module;
Symbol previous = null;
Symbol current;
do
{
current = s.NextSymbol();
if (current == Symbol.EOL)
{
continue;
}
else if (((current == Symbol.Comma) || (current == Symbol.Semicolon)) && (previous != null))
{
previous.AssertIsValidIdentifier();
_types.Add(previous.ToString());
}
previous = current;
}
while (current != Symbol.Semicolon);
}
/// <summary>
/// Creates an <see cref="TypeAssignment" />.
/// </summary>
/// <param name="module">The module.</param>
/// <param name="name">The name.</param>
/// <param name="type">The type.</param>
/// <param name="symbols">The symbols.</param>
/// <param name="isMacroSyntax">if set to <c>true</c> indicates that the syntax clause of a macro is parsed (e.g. OBJECT-TYPE, TEXTUAL-CONVENTION).</param>
public TypeAssignment(IModule module, string name, Symbol type, ISymbolEnumerator symbols, bool isMacroSyntax)
{
_module = module;
_name = name;
SymbolList typeSymbols = new SymbolList();
typeSymbols.Add(type);
Symbol current = symbols.NextSymbol();
while (current != Symbol.EOL)
{
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
break;
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
break;
}
typeSymbols.Add(current);
current = symbols.NextSymbol();
}
_type = typeSymbols.Join(" ");
if ((_ranges == null) && (_map == null))
{
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
}
else if (current != null)
{
symbols.PutBack(current);
}
}
if (isMacroSyntax)
{
// inside a macro the syntax is limited to one line, except there are brackets used for ranges/enums
return;
}
// outside macro Syntax clause we wait for two consecutive linebreaks with a following valid identifier as end condition
Symbol previous = current;
Symbol veryPrevious = null;
while ((current = symbols.NextSymbol()) != null)
{
if ((veryPrevious == Symbol.EOL) && (previous == Symbol.EOL) && current.IsValidIdentifier())
{
symbols.PutBack(current);
return;
}
veryPrevious = previous;
previous = current;
}
previous.Assert(false, "end of file reached");
}
private void ParseEntity(SymbolList preAssignSymbols, ISymbolEnumerator symbols)
{
if ((preAssignSymbols == null) || (preAssignSymbols.Count == 0))
{
Symbol s = symbols.NextSymbol();
if (s != null)
{
s.Assert(false, "Invalid Entity declaration");
}
else
{
throw new MibException("Invalid Entity declaration");
}
}
// check for a valid identifier
preAssignSymbols[0].AssertIsValidIdentifier();
if (preAssignSymbols.Count == 1)
{
// its a typedef
_tokens.Add(Lexer.ParseBasicTypeDef(this, preAssignSymbols[0].ToString(), symbols, isMacroSyntax: false));
return;
}
ISymbolEnumerator preAssignSymbolsEnumerator = preAssignSymbols.GetSymbolEnumerator();
preAssignSymbolsEnumerator.NextNonEOLSymbol(); // returns identifier
Symbol type = preAssignSymbolsEnumerator.NextNonEOLSymbol();
// parse declarations
if (type == Symbol.Object)
{
Symbol next = preAssignSymbolsEnumerator.NextNonEOLSymbol();
if (next == Symbol.Identifier)
{
_tokens.Add(new OidValueAssignment(this, preAssignSymbols, symbols));
return;
}
else if (next != null)
{
preAssignSymbolsEnumerator.PutBack(next);
}
}
if (type == Symbol.ModuleIdentity)
{
_tokens.Add(new ModuleIdentity(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectType)
{
_tokens.Add(new ObjectType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectGroup)
{
_tokens.Add(new ObjectGroup(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.NotificationGroup)
{
_tokens.Add(new NotificationGroup(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ModuleCompliance)
{
_tokens.Add(new ModuleCompliance(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.NotificationType)
{
_tokens.Add(new NotificationType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectIdentity)
{
_tokens.Add(new ObjectIdentity(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.Macro)
{
_tokens.Add(new Macro(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.TrapType)
{
_tokens.Add(new TrapType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.AgentCapabilities)
{
_tokens.Add(new AgentCapabilities(this, preAssignSymbols, symbols));
return;
}
preAssignSymbols[1].Assert(false, "Unknown/Invalid declaration");
}
private void ParseEntity(SymbolList preAssignSymbols, ISymbolEnumerator symbols)
{
if ((preAssignSymbols == null) || (preAssignSymbols.Count == 0))
{
Symbol s = symbols.NextSymbol();
if (s != null)
{
s.Assert(false, "Invalid Entitiy declaration");
}
else
{
throw new MibException("Invalid Entitiy declaration");
}
}
// check for a valid identifier
preAssignSymbols[0].AssertIsValidIdentifier();
if (preAssignSymbols.Count == 1)
{
// its a typedef
_tokens.Add(Lexer.ParseBasicTypeDef(this, preAssignSymbols[0].ToString(), symbols, isMacroSyntax: false));
return;
}
ISymbolEnumerator preAssignSymbolsEnumerator = preAssignSymbols.GetSymbolEnumerator();
preAssignSymbolsEnumerator.NextNonEOLSymbol(); // returns identifier
Symbol type = preAssignSymbolsEnumerator.NextNonEOLSymbol();
// parse declarations
if (type == Symbol.Object)
{
Symbol next = preAssignSymbolsEnumerator.NextNonEOLSymbol();
if (next == Symbol.Identifier)
{
_tokens.Add(new OidValueAssignment(this, preAssignSymbols, symbols));
return;
}
else if (next != null)
{
preAssignSymbolsEnumerator.PutBack(next);
}
}
if (type == Symbol.ModuleIdentity)
{
_tokens.Add(new ModuleIdentity(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectType)
{
_tokens.Add(new ObjectType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectGroup)
{
_tokens.Add(new ObjectGroup(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.NotificationGroup)
{
_tokens.Add(new NotificationGroup(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ModuleCompliance)
{
_tokens.Add(new ModuleCompliance(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.NotificationType)
{
_tokens.Add(new NotificationType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.ObjectIdentity)
{
_tokens.Add(new ObjectIdentity(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.Macro)
{
_tokens.Add(new Macro(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.TrapType)
{
_tokens.Add(new TrapType(this, preAssignSymbols, symbols));
return;
}
if (type == Symbol.AgentCapabilities)
{
_tokens.Add(new AgentCapabilities(this, preAssignSymbols, symbols));
return;
}
preAssignSymbols[1].Assert(false, "Unknown/Invalid declaration");
}
private void ParseEntities(ISymbolEnumerator symbols)
{
Symbol temp = symbols.NextNonEOLSymbol();
SymbolList buffer = new SymbolList();
while (temp != Symbol.End)
{
if (temp == Symbol.Assign)
{
ParseEntity(buffer, symbols);
buffer.Clear();
// skip linebreaks behind an entity
temp = symbols.NextNonEOLSymbol();
}
else
{
buffer.Add(temp);
temp = symbols.NextSymbol();
}
}
}
/// <summary>
/// Creates an <see cref="TypeAssignment" />.
/// </summary>
/// <param name="module">The module.</param>
/// <param name="name">The name.</param>
/// <param name="type">The type.</param>
/// <param name="symbols">The symbols.</param>
/// <param name="isMacroSyntax">if set to <c>true</c> indicates that the syntax clause of a macro is parsed (e.g. OBJECT-TYPE, TEXTUAL-CONVENTION).</param>
public TypeAssignment(IModule module, string name, Symbol type, ISymbolEnumerator symbols, bool isMacroSyntax)
{
_module = module;
_name = name;
SymbolList typeSymbols = new SymbolList();
typeSymbols.Add(type);
Symbol current = symbols.NextSymbol();
while (current != Symbol.EOL)
{
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
break;
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
break;
}
typeSymbols.Add(current);
current = symbols.NextSymbol();
}
_type = typeSymbols.Join(" ");
if ((_ranges == null) && (_map == null))
{
current = symbols.NextNonEOLSymbol();
if (current == Symbol.OpenParentheses)
{
// parse range of unknown type
symbols.PutBack(current);
_ranges = Lexer.DecodeRanges(symbols);
}
else if (current == Symbol.OpenBracket)
{
symbols.PutBack(current);
_map = Lexer.DecodeEnumerations(symbols);
}
else if (current != null)
{
symbols.PutBack(current);
}
}
if (isMacroSyntax)
{
// inside a macro the syntax is limited to one line, except there are brackets used for ranges/enums
return;
}
// outside macro Syntax clause we wait for two consecutive linebreaks with a following valid identifier as end condition
Symbol previous = current;
Symbol veryPrevious = null;
while ((current = symbols.NextSymbol()) != null)
{
if ((veryPrevious == Symbol.EOL) && (previous == Symbol.EOL) && current.IsValidIdentifier())
{
symbols.PutBack(current);
return;
}
veryPrevious = previous;
previous = current;
}
previous.Assert(false, "end of file reached");
}
