34 lines
573 B
PHP
34 lines
573 B
PHP
<?php
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namespace Automata\Memory;
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use InvalidArgumentException;
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use Program\Program;
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class ProgramMemory
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{
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/** @var Program[] */
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private array $memory = [];
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public function write(Program $program): void
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{
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$this->guardInvalidProgramNumber($program->N);
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$this->memory[$program->N] = $program;
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}
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public function read(int $N): ?Program
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{
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return @$this->memory[$N];
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}
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private function guardInvalidProgramNumber(int $N): void
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{
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if ($N > 9998 || $N < 9001) {
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throw new InvalidArgumentException('Program number must be in range 9001 - 9998');
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}
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}
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}
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