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<?php |
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namespace SPSS\Sav\Record\Info; |
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use SPSS\Buffer; |
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use SPSS\Sav\Record\Info; |
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class LongStringValueLabels extends Info |
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{ |
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const SUBTYPE = 21; |
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/** |
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* @var array |
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*/ |
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public $data = []; |
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/** |
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* @param \SPSS\Buffer $buffer |
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* @throws \SPSS\Exception |
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*/ |
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public function read(Buffer $buffer) |
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{ |
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parent::read($buffer); |
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$buffer = $buffer->allocate($this->dataCount * $this->dataSize); |
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while ($varNameLength = $buffer->readInt()) { |
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$varName = $buffer->readString($varNameLength); |
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$varWidth = $buffer->readInt(); // The width of the variable, in bytes, which will be between 9 and 32767 |
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$valuesCount = $buffer->readInt(); |
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$this->data[$varName] = [ |
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'width' => $varWidth, |
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'values' => [], |
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]; |
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for ($i = 0; $i < $valuesCount; $i++) { |
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$valueLength = $buffer->readInt(); |
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$value = rtrim($buffer->readString($valueLength)); |
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$labelLength = $buffer->readInt(); |
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$label = rtrim($buffer->readString($labelLength)); |
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$this->data[$varName]['values'][$value] = $label; |
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} |
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} |
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} |
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/** |
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* @param \SPSS\Buffer $buffer |
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*/ |
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public function write(Buffer $buffer) |
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{ |
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$localBuffer = Buffer::factory('', ['memory' => true]); |
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foreach ($this->data as $varName => $data) { |
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if (! isset($data['width'])) { |
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throw new \InvalidArgumentException('width required'); |
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} |
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if (! isset($data['values'])) { |
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throw new \InvalidArgumentException('values required'); |
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} |
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$width = (int) $data['width']; |
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$localBuffer->writeInt(mb_strlen($varName)); |
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$localBuffer->writeString($varName); |
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$localBuffer->writeInt($width); |
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$localBuffer->writeInt(count($data['values'])); |
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foreach ($data['values'] as $value => $label) { |
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$localBuffer->writeInt($width); |
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$localBuffer->writeString($value, $width); |
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$localBuffer->writeInt(mb_strlen($label)); |
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$localBuffer->writeString($label); |
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} |
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} |
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// retrieve bytes count |
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$this->dataCount = $localBuffer->position(); |
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if ($this->dataCount > 0) { |
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parent::write($buffer); |
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$localBuffer->rewind(); |
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$buffer->writeStream($localBuffer->getStream()); |
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} |
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} |
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} |
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collecthor /
spss
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