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<?php |
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/** |
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* This file is part of Railt package. |
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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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declare(strict_types=1); |
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namespace Railt\SDL\Frontend\IR; |
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use Railt\Io\Readable; |
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use Railt\Reflection\Contracts\TypeInterface; |
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use Railt\SDL\Frontend\AST\Value\ValueInterface; |
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/** |
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* Class Opcode |
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*/ |
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class Opcode implements OpcodeInterface |
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{ |
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/** |
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* @var array|string[]|null |
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*/ |
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protected static $opcodes; |
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/** |
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* @var int |
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*/ |
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protected $operation; |
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/** |
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* @var array |
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*/ |
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protected $operands; |
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/** |
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* Opcode constructor. |
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* @param int $operation |
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* @param mixed ...$operands |
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*/ |
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public function __construct(int $operation, ...$operands) |
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{ |
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$this->operation = $operation; |
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$this->operands = $operands; |
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} |
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/** |
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* @return int |
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*/ |
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public function getOperation(): int |
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{ |
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return $this->operation; |
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} |
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/** |
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* @return array |
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*/ |
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public function getOperands(): array |
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{ |
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return $this->operands; |
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} |
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/** |
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* @param int $id |
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* @param Readable $readable |
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* @param int $offset |
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* @return JoinableOpcode |
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*/ |
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public function join(int $id, Readable $readable, int $offset = 0): JoinableOpcode |
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{ |
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return new JoinableOpcode($this, $id, $readable, $offset); |
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} |
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/** |
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* @param mixed $value |
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* @return string |
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*/ |
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protected function operandToString($value): string |
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{ |
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switch (true) { |
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case $value instanceof ValueInterface: |
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return $value->toString(); |
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case $value instanceof TypeInterface: |
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return '$' . $value->getName(); |
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case $value instanceof JoinableOpcode: |
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return '!' . $value->getId(); |
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case $value instanceof OpcodeInterface: |
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return $value->getName(); |
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case $value instanceof Readable: |
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return 'file:' . $value->getPathname(); |
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case \is_bool($value): |
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return '(php:bool)' . ($value ? 'true' : 'false'); |
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case $value === null: |
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return '(php:null)null'; |
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case \is_scalar($value): |
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$type = \gettype($value); |
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$minified = \preg_replace('/\s+/', ' ', (string)$value); |
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return '(php:' . $type . ')"' . \addcslashes($minified, '"') . '"'; |
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case \is_object($value): |
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return \get_class($value) . '#' . \spl_object_hash($value); |
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} |
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return ''; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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$operands = \array_map(function ($value): string { |
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return $this->operandToString($value); |
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}, $this->operands); |
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return \sprintf('%-20s %-20s', $this->getName(), '{' . \implode(', ', $operands) . '}'); |
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} |
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/** |
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* @return string |
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*/ |
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public function getName(): string |
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{ |
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return static::getOperationName($this->operation); |
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} |
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/** |
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* @param int $operation |
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* @return string |
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*/ |
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public static function getOperationName(int $operation): string |
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{ |
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if (static::$opcodes === null) { |
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static::$opcodes = []; |
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try { |
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$reflection = new \ReflectionClass(static::class); |
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foreach ($reflection->getConstants() as $name => $value) { |
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static::$opcodes[$value] = $name; |
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} |
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} catch (\ReflectionException $e) { |
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return 'RL_NOP'; |
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} |
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} |
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return static::$opcodes[$operation] ?? static::$opcodes[static::RL_NOP]; |
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} |
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} |
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railt /
sdl
