65 lines
1.5 KiB
PHP
65 lines
1.5 KiB
PHP
<?php
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namespace captn3m0\NandToTetris;
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require_once("CommandType.php");
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require_once("CodeWriter.php");
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require_once("Parser.php");
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class VMTranslator {
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function __construct(String $fileOrDir ) {
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if (is_dir($fileOrDir)) {
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$this->files = glob("$fileOrDir/*.vm");
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} else {
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$this->files = [$fileOrDir];
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}
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foreach ($this->files as $file) {
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assert(is_readable($file));
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}
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$outputFile = $this->outputFile();
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$this->writer = new CodeWriter($outputFile);
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}
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function translate() {
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foreach ($this->files as $file) {
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$parser = new Parser($file);
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$this->writer->setInputFileName($file);
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foreach ($parser->commands() as $command) {
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$commandType = CommandType::fromName($command);
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switch ($commandType) {
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case CommandType::ARITHMETIC:
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$this->writer->writeArithmetic($command);
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break;
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case CommandType::PUSH:
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case CommandType::POP:
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$segment = $parser->arg1();
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$index = intval($parser->arg2());
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$this->writer->writePushPop($commandType, $segment, $index);
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break;
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default:
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throw new \Exception("Not Implemented $command", 1);
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break;
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}
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$this->writer->nextSourceLine();
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}
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}
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$this->writer->close();
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}
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private function outputFile() {
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$dir = dirname($this->files[0]);
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$name = basename($dir);
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return "$dir/$name.asm";
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}
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}
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if(isset($argv[1])) {
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$vmt = new VMTranslator($argv[1]);
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$vmt->translate();
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}
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