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<?php
/**
* Copyright 2019 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\CRC32;
trait CRCTrait
{
/**
* Converts a integer into a 8 character hex string in lower case.
*
* @param integer $i Integer to convert.
*
* @return string 8 character hex string in lower case.
*/
private static function int2hex($i)
{
return str_pad(dechex($i), 8, '0', STR_PAD_LEFT);
}
/**
* { function_description }
*
* @param integer $crc The CRC hash
* @param boolean $raw_output When set to TRUE, outputs raw binary data.
* FALSE outputs lowercase hexits.
*
* @return string Returns a string containing the calculated CRC as
* lowercase hexits unless raw_output is set to true in
* which case the raw binary representation of the CRC is
* returned.
*/
private static function crcHash($crc, $raw_output)
{
$crc = $crc & 0xffffffff;
if ($raw_output) {
return pack('N', $crc);
}
return self::int2hex($crc);
}
}
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