66 lines
2.1 KiB
C#
66 lines
2.1 KiB
C#
using Canon.Console.Models;
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using Canon.Core.Abstractions;
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using Canon.Core.LexicalParser;
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using Canon.Core.SemanticParser;
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using Canon.Core.SyntaxNodes;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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namespace Canon.Console.Services;
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public class Compiler(
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CompilerOption compilerOption,
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ILexer lexer,
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IGrammarParser grammarParser,
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SyntaxTreeTraveller traveller,
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IHostApplicationLifetime applicationLifetime,
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ILogger<Compiler> logger) : IHostedService
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{
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public async Task StartAsync(CancellationToken cancellationToken)
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{
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IEnumerable<SemanticToken> tokens = lexer.Tokenize(await CreateSourceReader());
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ProgramStruct root = grammarParser.Analyse(tokens);
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CodeGeneratorVisitor visitor = new();
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traveller.Travel(root, visitor);
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await WriteToOutputFile(visitor.Builder.Build());
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applicationLifetime.StopApplication();
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}
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public Task StopAsync(CancellationToken cancellationToken)
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{
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return Task.CompletedTask;
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}
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private async Task<ISourceReader> CreateSourceReader()
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{
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if (!Path.IsPathRooted(compilerOption.SourceFilename))
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{
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compilerOption.SourceFilename = Path.Combine(Environment.CurrentDirectory, compilerOption.SourceFilename);
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}
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logger.LogDebug("Select source file: '{}'.", compilerOption.SourceFilename);
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FileInfo sourceFile = new(compilerOption.SourceFilename);
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using StreamReader reader = sourceFile.OpenText();
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return new StringSourceReader(await reader.ReadToEndAsync());
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}
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private async Task WriteToOutputFile(string compiledCode)
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{
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FileInfo outputFile = new(Path.Combine(Path.GetDirectoryName(compilerOption.SourceFilename)!,
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Path.GetFileNameWithoutExtension(compilerOption.SourceFilename) + ".c"));
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logger.LogDebug("Select output file: '{}'.", outputFile.Name);
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if (outputFile.Exists)
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{
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logger.LogWarning("Rewrite output file : '{}'", outputFile.Name);
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}
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await using StreamWriter writer = outputFile.CreateText();
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await writer.WriteAsync(compiledCode);
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}
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}
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