71 lines
1.8 KiB
PHP
71 lines
1.8 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* Copyright (c) 2020 https://rewiv.com sikofitt@gmail.com
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*
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* This Source Code Form is subject to the
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* terms of the Mozilla Public License, v. 2.0.
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*
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* If a copy of the MPL was not distributed with this file,
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* You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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namespace Sikofitt\Console;
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use FFI;
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use RuntimeException;
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final class Getch
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{
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private const LINUX_LIBRARY = __DIR__.'/Resources/libgetch.so';
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private const WINDOWS_LIBRARY = 'ucrtbase.dll';
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private const DECLARATIONS = <<<DECLARATIONS
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int _getch();
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int _ungetch(int c);
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DECLARATIONS;
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private static ?FFI $ffi = null;
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public function __construct(string $linuxLibrary = null)
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{
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if (null === $linuxLibrary) {
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$linuxLibrary = self::LINUX_LIBRARY;
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}
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if (null === self::$ffi) {
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$osFamily = PHP_OS_FAMILY;
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if ('Windows' === $osFamily) {
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self::$ffi = FFI::cdef(self::DECLARATIONS, self::WINDOWS_LIBRARY);
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} elseif ('Linux' === $osFamily) {
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if (!file_exists($linuxLibrary)) {
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throw new RuntimeException(sprintf('Could not find library file %s.', $linuxLibrary));
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}
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self::$ffi = FFI::cdef(self::DECLARATIONS, $linuxLibrary);
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} else {
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throw new RuntimeException(sprintf('Sorry, %s is not supported yet.', $osFamily));
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}
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}
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}
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public function getch(): int
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{
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return self::$ffi->_getch();
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}
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public function ungetch($char): int
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{
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if (!is_string($char) && !is_int($char)) {
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throw new \TypeError('ungetch takes a parameter of int or string.');
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}
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if (is_string($char)) {
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$char = ord($char[0]);
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}
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return self::$ffi->_ungetch($char);
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}
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}
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