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Diffstat (limited to 'Compiler/visitors/Main.cs')
| -rw-r--r-- | Compiler/visitors/Main.cs | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/Compiler/visitors/Main.cs b/Compiler/visitors/Main.cs deleted file mode 100644 index 3b32399..0000000 --- a/Compiler/visitors/Main.cs +++ /dev/null @@ -1,183 +0,0 @@ -namespace Q1.Compiler.visitors; - -using System.Text; -using Antlr4.Runtime.Tree; -using Q1.Emulator; - -public partial class CCompilerVisitor : CGrammarBaseVisitor<object?> -{ - private int _branchCount = 1; - private List<string> _instructions = new(); - private Stack<Dictionary<string, VariableReference>> _variableStack = new(); - private List<FunctionReference> _methods = new(); - private static int _memLowest = Q1Layout.FreeMemoryStart; - private static int _memPointer = CCompilerVisitor._memLowest; - - private const int ColumnWidth = 30; - - public readonly CommentCompilationMode CommentMode; - - public CCompilerVisitor(CommentCompilationMode commentMode, Encoding encoding) - { - this.CommentMode = commentMode; - this.Encoding = encoding; - } - - private string GenerateBranchLabel(string type) - { - return $"_{type}_{this._branchCount++}"; - } - private void Instruction(string instruction, string? generatedComment = null) - { - this._instructions.Add($" {instruction}"); - if (generatedComment != null) - this.CommentLastInstruction(generatedComment); - } - private void Blank() - { - this._instructions.Add(""); - } - private void Branch(string name, string? generatedComment = null) - { - this._instructions.Add($"{name}:"); - if (generatedComment != null) - this.CommentLastInstruction(generatedComment); - } - private void UserComment(string comment) - { - if (this.CommentMode.HasFlag(CommentCompilationMode.UserDefined)) - this._instructions.Add($" ; {comment}"); - } - - private void GeneratedComment(string comment) - { - if (this.CommentMode.HasFlag(CommentCompilationMode.Generated)) - this._instructions.Add($"{"".PadRight(CCompilerVisitor.ColumnWidth)}; {comment}"); - } - - private void CommentLastInstruction(string comment) - { - if (!this.CommentMode.HasFlag(CommentCompilationMode.Generated)) - return; - - if (this._instructions.Count == 0) - throw new Exception("Cannot add comment to last instruction, there are none"); - - string lastInstruction = this._instructions[^1]; - lastInstruction = $"{lastInstruction.PadRight(CCompilerVisitor.ColumnWidth)}; {comment}"; - - this._instructions[^1] = lastInstruction; - } - - - public IEnumerable<string> Compile(CGrammarParser.ProgramContext program) - { - this.Instruction("jmp _main"); - this.Visit(program); - - foreach ((CGrammarParser.FunctionDefinitionContext context, - FunctionReference function, FunctionOverload overload, - List<string> paramNames, List<CType> paramTypes) in this._functionBodies) - this.VisitFunctionBody(context, function, overload, paramNames, paramTypes); - - return this._instructions; - } - - private Dictionary<string, VariableReference> EnterScope() - { - Dictionary<string, VariableReference> scope = new(); - this._variableStack.Push(scope); - - return scope; - } - private void ExitScope() - { - foreach ((string key, VariableReference value) in this._variableStack.Peek()) - { - // CCompilerVisitor._memPointer -= value.Type.Size; - // if (CCompilerVisitor._memPointer < CCompilerVisitor._memLowest) - // throw new CompilerException("Memory pointer is lower than mem lowest!"); - } - - // Delete scope - this._variableStack.Pop(); - } - - public void DynamicMove(CType type, string source, string dest, string? comment = null) - { - if (type.Size == 1) - this.Instruction($"movb {source}, {dest}", comment); - else if (type.Size == 2) - this.Instruction($"mov {source}, {dest}", comment); - else - throw new CompilerException($"Cannot move {type.Size} bytes {source} to {dest}"); - } - - private CType VisitCType(CGrammarParser.TypeContext typeContext) - { - return GetCType(typeContext.GetText().Trim()); - } - - private CType GetCType(string type) - { - return type switch - { - "int" => CType.Int, - "char" => CType.Char, - _ when type.EndsWith("*") => new CTypePtr(this.GetCType(type[..^1])), - _ => throw new CompilerException($"Unknown CTYPE '{type}'") - }; - } - - public override object? VisitErrorNode(IErrorNode node) - { - if (node.Symbol.Type == CGrammarParser.COMMENT) - { - // strip // and \n and whitespace - string comment = node - .Symbol.Text - .TrimStart("//") - .TrimEnd('\n') - .Trim(); - - this.UserComment(comment); - } - - if (node.Symbol.Type == CGrammarParser.DIRECTIVE) - { - // strip // and \n and whitespace - string directive = node - .Symbol.Text - .TrimStart("#") - .TrimEnd('\n') - .Trim(); - - this.Instruction(directive); - } - - return base.VisitErrorNode(node); - } - - public override object? Visit(IParseTree tree) - { - if (tree is Context childCtx && tree.Parent is Context ctx) - ctx.SyncProps(childCtx); - - return base.Visit(tree); - } - - /// <summary> - /// Basically identical to base version, except calls Visit on each child, making Visit not redundant. - /// </summary> - public override object? VisitChildren(IRuleNode node) - { - object? result = this.DefaultResult; - int childCount = node.ChildCount; - for (int i = 0; i < childCount && this.ShouldVisitNextChild(node, result); ++i) - { - object? nextResult = this.Visit(node.GetChild(i)); - result = this.AggregateResult(result, nextResult); - } - return result; - } -}
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