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Handle ASCII codes > 128 in the tokenizer

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This commit is contained in:
Eugen Wissner
2025-05-30 19:51:40 +02:00
parent 4eccc147ba
commit 8ad1259ee8
2 changed files with 128 additions and 120 deletions
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34
source/Lexer.elna
View File

@ -72,6 +72,8 @@ var
transitions: [16]TransitionClasses;
proc initialize_classification();
var
i: CARDINAL;
begin
classification[1] := transitionClassEof; (* NUL *)
classification[2] := transitionClassInvalid; (* SOH *)
@ -200,24 +202,30 @@ begin
classification[125] := transitionClassSingle; (* | *)
classification[126] := transitionClassOther; (* } *)
classification[127] := transitionClassSingle; (* ~ *)
classification[128] := transitionClassInvalid (* DEL *)
classification[128] := transitionClassInvalid; (* DEL *)
i := 129;
while i <= 256 do
classification[i] := transitionClassOther;
i := i + 1
end
end;
proc compare_keyword(Keyword: ARRAY OF CHAR, TokenStart: PLexerBuffer, TokenEnd: PLexerBuffer): BOOLEAN;
var
Result: BOOLEAN;
result: BOOLEAN;
Index: CARDINAL;
begin
Index := 0;
Result := TRUE;
result := TRUE;
while (Index < Length(Keyword)) & (TokenStart <> TokenEnd) & Result DO
Result := (Keyword[Index] = TokenStart^) or (Lower(Keyword[Index]) = TokenStart^);
while (Index < Length(Keyword)) & (TokenStart <> TokenEnd) & result DO
result := (Keyword[Index] = TokenStart^) or (Lower(Keyword[Index]) = TokenStart^);
INC(TokenStart);
INC(Index)
end;
Result := (Index = Length(Keyword)) & (TokenStart = TokenEnd) & Result;
return Result
result := (Index = Length(Keyword)) & (TokenStart = TokenEnd) & result;
return result
end;
(* Reached the end of file. *)
@ -761,7 +769,7 @@ var
CurrentClass: TransitionClass;
CurrentState: TransitionState;
CurrentTransition: Transition;
Result: LexerToken;
result: LexerToken;
begin
lexer^.Current := lexer^.Start;
CurrentState := transitionStateStart;
@ -771,16 +779,16 @@ begin
CurrentTransition := transitions[ORD(CurrentState) + 1][ORD(CurrentClass) + 1];
if CurrentTransition.Action <> nil then
CurrentTransition.Action(lexer, ADR(Result))
CurrentTransition.Action(lexer, ADR(result))
end;
CurrentState := CurrentTransition.NextState
end;
return Result
return result
end;
proc lexer_lex(lexer: PLexer): LexerToken;
var
Result: LexerToken;
result: LexerToken;
begin
if lexer^.Length = 0 then
lexer^.Length := ReadNBytes(lexer^.Input, CHUNK_SIZE, lexer^.Buffer);
@ -788,8 +796,8 @@ begin
end;
lexer^.Start := lexer^.Current;
Result := lexer_current(lexer);
return Result
result := lexer_current(lexer);
return result
end;
proc lexer_destroy(lexer: PLexer);

214
source/Transpiler.elna
View File

@ -75,39 +75,39 @@ end;
proc transpile_constant(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString(' ');
Token := lexer_current(lexer);
token := lexer_current(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
WriteString(' = ');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
write_semicolon()
end;
proc transpile_constant_part(context: PTranspilerContext, lexer: PLexer): BOOLEAN;
var
Token: LexerToken;
token: LexerToken;
result: BOOLEAN;
begin
Token := lexer_current(lexer);
result := Token.Kind = lexerKindConst;
token := lexer_current(lexer);
result := token.Kind = lexerKindConst;
if result then
WriteString('CONST');
WriteLn();
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
while Token.Kind = lexerKindIdentifier do
while token.Kind = lexerKindIdentifier do
transpile_constant(context, lexer);
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end
end;
return result
@ -115,31 +115,31 @@ end;
proc transpile_module(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
if Token.Kind = lexerKindDefinition then
if token.Kind = lexerKindDefinition then
WriteString('DEFINITION ');
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end;
if Token.Kind = lexerKindImplementation then
if token.Kind = lexerKindImplementation then
WriteString('IMPLEMENTATION ');
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end;
WriteString('MODULE ');
(* Write the module name and end the line with a semicolon and newline. *)
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
write_semicolon();
WriteLn();
(* Write the module body. *)
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
transpile_import_part(context, lexer);
if transpile_constant_part(context, lexer) then
WriteLn()
@ -153,33 +153,33 @@ begin
WriteString('END ');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
Write('.');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
WriteLn()
end;
proc transpile_type_fields(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
while Token.Kind <> lexerKindEnd do
while token.Kind <> lexerKindEnd do
WriteString(' ');
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
WriteString(': ');
transpile_type_expression(context, lexer);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
if Token.Kind = lexerKindSemicolon then
Token := transpiler_lex(lexer);
if token.Kind = lexerKindSemicolon then
token := transpiler_lex(lexer);
Write(';')
end;
WriteLn()
@ -188,7 +188,7 @@ end;
proc transpile_record_type(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
begin
WriteString('RECORD');
WriteLn();
@ -198,33 +198,33 @@ end;
proc transpile_pointer_type(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
Token := lexer_current(lexer);
token := lexer_current(lexer);
WriteString('POINTER TO ');
if Token.Kind = lexerKindPointer then
Token := transpiler_lex(lexer)
if token.Kind = lexerKindPointer then
token := transpiler_lex(lexer)
end;
transpile_type_expression(context, lexer)
end;
proc transpile_array_type(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString('ARRAY');
Token := lexer_current(lexer);
token := lexer_current(lexer);
if Token.Kind = lexerKindArray then
Token := transpiler_lex(lexer)
if token.Kind = lexerKindArray then
token := transpiler_lex(lexer)
end;
if Token.Kind <> lexerKindOf then
if token.Kind <> lexerKindOf then
WriteString('[1..');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
Write(']')
end;
WriteString(' OF ');
@ -233,26 +233,26 @@ end;
proc transpile_enumeration_type(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString('(');
WriteLn();
WriteString(' ');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
while Token.Kind = lexerKindComma do
while token.Kind = lexerKindComma do
Write(',');
WriteLn();
WriteString(' ');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end;
WriteLn();
WriteString(' )')
@ -260,25 +260,25 @@ end;
proc transpile_union_type(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
end;
proc transpile_procedure_type(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
WriteString('PROCEDURE(');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
while Token.Kind <> lexerKindRightParen do
while token.Kind <> lexerKindRightParen do
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
if Token.Kind = lexerKindComma then
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
if token.Kind = lexerKindComma then
token := transpiler_lex(lexer);
WriteString(', ')
end
end;
@ -287,43 +287,43 @@ end;
proc transpile_type_expression(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
Token := transpiler_lex(lexer);
if Token.Kind = lexerKindRecord then
token := transpiler_lex(lexer);
if token.Kind = lexerKindRecord then
transpile_record_type(context, lexer)
end;
if Token.Kind = lexerKindLeftParen then
if token.Kind = lexerKindLeftParen then
transpile_enumeration_type(context, lexer)
end;
if (Token.Kind = lexerKindArray) or (Token.Kind = lexerKindLeftSquare) then
if (token.Kind = lexerKindArray) or (token.Kind = lexerKindLeftSquare) then
transpile_array_type(context, lexer)
end;
if Token.Kind = lexerKindHat then
if token.Kind = lexerKindHat then
transpile_pointer_type(context, lexer)
end;
if Token.Kind = lexerKindProc then
if token.Kind = lexerKindProc then
transpile_procedure_type(context, lexer)
end;
if Token.Kind = lexerKindIdentifier then
if token.Kind = lexerKindIdentifier then
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start)
end
end;
proc transpile_type_declaration(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString(' ');
Token := lexer_current(lexer);
token := lexer_current(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
WriteString(' = ');
transpile_type_expression(context, lexer);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
write_semicolon();
end;
@ -348,36 +348,36 @@ end;
proc transpile_variable_declaration(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString(' ');
Token := lexer_current(lexer);
token := lexer_current(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
WriteString(': ');
transpile_type_expression(context, lexer);
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
write_semicolon()
end;
proc transpile_variable_part(context: PTranspilerContext, lexer: PLexer): BOOLEAN;
var
Token: LexerToken;
token: LexerToken;
result: BOOLEAN;
begin
Token := lexer_current(lexer);
result := Token.Kind = lexerKindVar;
token := lexer_current(lexer);
result := token.Kind = lexerKindVar;
if result then
WriteString('VAR');
WriteLn();
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
while Token.Kind = lexerKindIdentifier do
while token.Kind = lexerKindIdentifier do
transpile_variable_declaration(context, lexer);
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end
end;
return result
@ -428,14 +428,14 @@ begin
return result
end;
proc transpile_expression(context: PTranspilerContext, lexer: PLexer, TrailingToken: LexerKind);
proc transpile_expression(context: PTranspilerContext, lexer: PLexer, trailing_token: LexerKind);
var
token: LexerToken;
written_bytes: CARDINAL;
begin
token := transpiler_lex(lexer);
while (token.Kind <> TrailingToken) & (token.Kind <> lexerKindEnd) do
while (token.Kind <> trailing_token) & (token.Kind <> lexerKindEnd) do
written_bytes := 0;
if token.Kind = lexerKindNull then
WriteString('NIL ');
@ -478,7 +478,7 @@ end;
proc transpile_while_statement(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString(' WHILE ');
@ -488,7 +488,7 @@ begin
WriteLn();
transpile_statements(context, lexer);
WriteString(' END');
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end;
proc transpile_assignment_statement(context: PTranspilerContext, lexer: PLexer);
@ -499,27 +499,27 @@ end;
proc transpile_call_statement(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString('(');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
while (Token.Kind <> lexerKindSemicolon) & (Token.Kind <> lexerKindEnd) do
while (token.Kind <> lexerKindSemicolon) & (token.Kind <> lexerKindEnd) do
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end
end;
proc transpile_return_statement(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
begin
WriteString(' RETURN ');
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
written_bytes := WriteNBytes(StdOut, ADDRESS(lexer^.Current - lexer^.Start), lexer^.Start);
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end;
proc transpile_statement(context: PTranspilerContext, lexer: PLexer);
@ -589,15 +589,15 @@ end;
proc transpile_statements(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
begin
Token := lexer_current(lexer);
token := lexer_current(lexer);
while Token.Kind <> lexerKindEnd do
while token.Kind <> lexerKindEnd do
transpile_statement(context, lexer);
Token := lexer_current(lexer);
token := lexer_current(lexer);
if Token.Kind = lexerKindSemicolon then
if token.Kind = lexerKindSemicolon then
Write(';')
end;
WriteLn()
@ -606,10 +606,10 @@ end;
proc transpile_statement_part(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
begin
Token := lexer_current(lexer);
if Token.Kind = lexerKindBegin then
token := lexer_current(lexer);
if token.Kind = lexerKindBegin then
WriteString('BEGIN');
WriteLn();
transpile_statements(context, lexer)
@ -618,39 +618,39 @@ end;
proc transpile_procedure_declaration(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
seen_part: BOOLEAN;
written_bytes: CARDINAL;
begin
Token := transpile_procedure_heading(context, lexer);
token := transpile_procedure_heading(context, lexer);
seen_part := transpile_constant_part(context, lexer);
seen_part := transpile_variable_part(context, lexer);
transpile_statement_part(context, lexer);
WriteString('END ');
written_bytes := WriteNBytes(StdOut, ORD(Token.identifierKind[1]), ADR(Token.identifierKind[2]));
written_bytes := WriteNBytes(StdOut, ORD(token.identifierKind[1]), ADR(token.identifierKind[2]));
Token := transpiler_lex(lexer);
token := transpiler_lex(lexer);
write_semicolon();
Token := transpiler_lex(lexer)
token := transpiler_lex(lexer)
end;
proc transpile_procedure_part(context: PTranspilerContext, lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
begin
Token := lexer_current(lexer);
token := lexer_current(lexer);
while Token.Kind = lexerKindProc do
while token.Kind = lexerKindProc do
transpile_procedure_declaration(context, lexer);
Token := lexer_current(lexer);
token := lexer_current(lexer);
WriteLn()
end
end;
proc transpile(lexer: PLexer);
var
Token: LexerToken;
token: LexerToken;
written_bytes: CARDINAL;
Context: TranspilerContext;
begin