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<?php |
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|
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declare (strict_types=1); |
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namespace IAWP_SCOPED\MaxMind\Db\Reader; |
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|
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/** @internal */ |
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class Util |
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{ |
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/** |
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* @param resource $stream |
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*/ |
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public static function read($stream, int $offset, int $numberOfBytes) : string |
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{ |
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if ($numberOfBytes === 0) { |
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return ''; |
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} |
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if (\fseek($stream, $offset) === 0) { |
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$value = \fread($stream, $numberOfBytes); |
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// We check that the number of bytes read is equal to the number |
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// asked for. We use ftell as getting the length of $value is |
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// much slower. |
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if ($value !== \false && \ftell($stream) - $offset === $numberOfBytes) { |
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return $value; |
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} |
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} |
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throw new InvalidDatabaseException('The MaxMind DB file contains bad data'); |
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} |
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} |
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|
