Remove dead code
Jordi Boggiano
parent
bc28582723
commit
196ac10505
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@ -1,247 +0,0 @@
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<?php declare(strict_types=1);
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Composer\Autoload;
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use Composer\Pcre\Preg;
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/**
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* @author Jordi Boggiano <j.boggiano@seld.be>
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* @internal
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*/
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class PhpFileCleaner
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{
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/** @var array<array{name: string, length: int, pattern: non-empty-string}> */
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private static $typeConfig;
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/** @var non-empty-string */
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private static $restPattern;
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/**
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* @readonly
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* @var string
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*/
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private $contents;
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/**
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* @readonly
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* @var int
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*/
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private $len;
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/**
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* @readonly
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* @var int
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*/
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private $maxMatches;
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/** @var int */
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private $index = 0;
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/**
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* @param string[] $types
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*/
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public static function setTypeConfig(array $types): void
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{
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foreach ($types as $type) {
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self::$typeConfig[$type[0]] = [
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'name' => $type,
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'length' => \strlen($type),
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'pattern' => '{.\b(?<![\$:>])'.$type.'\s++[a-zA-Z_\x7f-\xff:][a-zA-Z0-9_\x7f-\xff:\-]*+}Ais',
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];
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}
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self::$restPattern = '{[^?"\'</'.implode('', array_keys(self::$typeConfig)).']+}A';
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}
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public function __construct(string $contents, int $maxMatches)
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{
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$this->contents = $contents;
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$this->len = \strlen($this->contents);
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$this->maxMatches = $maxMatches;
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}
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public function clean(): string
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{
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$clean = '';
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while ($this->index < $this->len) {
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$this->skipToPhp();
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$clean .= '<?';
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while ($this->index < $this->len) {
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$char = $this->contents[$this->index];
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if ($char === '?' && $this->peek('>')) {
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$clean .= '?>';
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$this->index += 2;
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continue 2;
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}
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if ($char === '"') {
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$this->skipString('"');
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$clean .= 'null';
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continue;
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}
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if ($char === "'") {
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$this->skipString("'");
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$clean .= 'null';
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continue;
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}
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if ($char === "<" && $this->peek('<') && $this->match('{<<<[ \t]*+([\'"]?)([a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*+)\\1(?:\r\n|\n|\r)}A', $match)) {
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$this->index += \strlen($match[0]);
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$this->skipHeredoc($match[2]);
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$clean .= 'null';
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continue;
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}
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if ($char === '/') {
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if ($this->peek('/')) {
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$this->skipToNewline();
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continue;
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}
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if ($this->peek('*')) {
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$this->skipComment();
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continue;
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}
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}
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if ($this->maxMatches === 1 && isset(self::$typeConfig[$char])) {
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$type = self::$typeConfig[$char];
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if (
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\substr($this->contents, $this->index, $type['length']) === $type['name']
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&& Preg::isMatch($type['pattern'], $this->contents, $match, 0, $this->index - 1)
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) {
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$clean .= $match[0];
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return $clean;
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}
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}
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$this->index += 1;
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if ($this->match(self::$restPattern, $match)) {
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$clean .= $char . $match[0];
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$this->index += \strlen($match[0]);
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} else {
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$clean .= $char;
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}
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}
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}
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return $clean;
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}
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private function skipToPhp(): void
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{
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while ($this->index < $this->len) {
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if ($this->contents[$this->index] === '<' && $this->peek('?')) {
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$this->index += 2;
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break;
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}
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$this->index += 1;
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}
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}
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private function skipString(string $delimiter): void
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{
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$this->index += 1;
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while ($this->index < $this->len) {
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if ($this->contents[$this->index] === '\\' && ($this->peek('\\') || $this->peek($delimiter))) {
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$this->index += 2;
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continue;
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}
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if ($this->contents[$this->index] === $delimiter) {
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$this->index += 1;
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break;
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}
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$this->index += 1;
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}
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}
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private function skipComment(): void
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{
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$this->index += 2;
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while ($this->index < $this->len) {
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if ($this->contents[$this->index] === '*' && $this->peek('/')) {
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$this->index += 2;
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break;
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}
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$this->index += 1;
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}
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}
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private function skipToNewline(): void
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{
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while ($this->index < $this->len) {
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if ($this->contents[$this->index] === "\r" || $this->contents[$this->index] === "\n") {
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return;
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}
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$this->index += 1;
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}
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}
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private function skipHeredoc(string $delimiter): void
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{
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$firstDelimiterChar = $delimiter[0];
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$delimiterLength = \strlen($delimiter);
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$delimiterPattern = '{'.preg_quote($delimiter).'(?![a-zA-Z0-9_\x80-\xff])}A';
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while ($this->index < $this->len) {
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// check if we find the delimiter after some spaces/tabs
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switch ($this->contents[$this->index]) {
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case "\t":
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case " ":
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$this->index += 1;
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continue 2;
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case $firstDelimiterChar:
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if (
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\substr($this->contents, $this->index, $delimiterLength) === $delimiter
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&& $this->match($delimiterPattern)
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) {
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$this->index += $delimiterLength;
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return;
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}
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break;
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}
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// skip the rest of the line
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while ($this->index < $this->len) {
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$this->skipToNewline();
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// skip newlines
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while ($this->index < $this->len && ($this->contents[$this->index] === "\r" || $this->contents[$this->index] === "\n")) {
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$this->index += 1;
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}
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break;
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}
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}
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}
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private function peek(string $char): bool
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{
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return $this->index + 1 < $this->len && $this->contents[$this->index + 1] === $char;
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}
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/**
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* @param non-empty-string $regex
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* @param null|array<int, string> $match
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*/
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private function match($regex, ?array &$match = null): bool
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{
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return Preg::isMatch($regex, $this->contents, $match, 0, $this->index);
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}
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}
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