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<?php |
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declare(strict_types=1); |
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namespace PBurggraf\BinaryUtilities\DataType; |
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use PBurggraf\BinaryUtilities\Exception\EndOfFileReachedException; |
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use PBurggraf\BinaryUtilities\Exception\InvalidByteSequenceException; |
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/** |
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* @author Philip Burggraf <[email protected]> |
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*/ |
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class FloatingPoint extends AbstractDataType |
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{ |
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/** |
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* @throws EndOfFileReachedException |
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* @throws InvalidByteSequenceException |
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* |
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* @return array |
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*/ |
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public function read(): array |
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{ |
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$bytes = []; |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$data = $this->endianMode->applyEndianess($bytes); |
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return [ |
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$this->mergeBytes($data), |
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]; |
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} |
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/** |
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* @param int $length |
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* |
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* @throws EndOfFileReachedException |
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* @throws InvalidByteSequenceException |
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* |
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* @return array |
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*/ |
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public function readArray(int $length): array |
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{ |
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$buffer = []; |
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for ($iterator = 0; $iterator < $length; ++$iterator) { |
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$bytes = []; |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$this->assertNotEndOfFile(); |
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$bytes[] = $this->getByte($this->offset++); |
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$data = $this->endianMode->applyEndianess($bytes); |
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$buffer[] = $this->mergeBytes($data); |
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} |
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return $buffer; |
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} |
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/** |
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* @param array $data |
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* |
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* @throws InvalidByteSequenceException |
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* |
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* @return float |
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*/ |
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private function mergeBytes(array $data): float |
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{ |
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$string = hex2bin(str_pad(dechex($data[0]), 2, '0', STR_PAD_LEFT) . str_pad(dechex($data[1]), 2, '0', STR_PAD_LEFT) . str_pad(dechex($data[2]), 2, '0', STR_PAD_LEFT) . str_pad(dechex($data[3]), 2, '0', STR_PAD_LEFT)); |
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$result = unpack('G', $string); |
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if (is_array($result) === false) { |
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throw new InvalidByteSequenceException(); |
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} |
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return $result[1]; |
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} |
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/** |
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* @param float|int $data |
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* |
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* @throws EndOfFileReachedException |
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*/ |
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public function write($data): void |
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{ |
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$bytes = $this->splitBytes($data); |
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$bytes = $this->endianMode->applyEndianess($bytes); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[0]); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[1]); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[2]); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[3]); |
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} |
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/** |
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* @param array $data |
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* |
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* @throws EndOfFileReachedException |
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*/ |
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public function writeArray(array $data): void |
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{ |
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$dataLength = count($data); |
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$startBytePosition = $this->offset; |
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for ($i = $startBytePosition; $i <= $startBytePosition - 1 + $dataLength; ++$i) { |
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$bytes = $this->splitBytes($data[$i - $startBytePosition]); |
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$bytes = $this->endianMode->applyEndianess($bytes); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[0]); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[1]); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[2]); |
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$this->assertNotEndOfFile(); |
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$this->setByte($this->offset++, $bytes[3]); |
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} |
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} |
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/** |
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* @param float|int $data |
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* |
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* @return array |
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*/ |
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public function splitBytes($data): array |
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{ |
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$data = hexdec(bin2hex(pack('G', $data))); |
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$bytes = []; |
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$bytes[] = ($data & 0xff000000) >> 24; |
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$bytes[] = ($data & 0x00ff0000) >> 16; |
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$bytes[] = ($data & 0x0000ff00) >> 8; |
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$bytes[] = ($data & 0x000000ff); |
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return $bytes; |
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} |
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/** |
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* @return string |
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*/ |
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public function newContent(): string |
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{ |
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return $this->content; |
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} |
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/** |
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* @return int |
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*/ |
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public function newOffset(): int |
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{ |
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return $this->offset; |
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} |
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} |
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pburggraf /
BinaryUtilities
