| <?php |
| |
| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * https://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 Apache\Avro; |
| |
| /** |
| * Library-level class for PHP Avro port. |
| * |
| * Contains library details such as version number and platform checks. |
| * |
| * This port is an implementation of the |
| * {@link https://avro.apache.org/docs/1.3.3/spec.html Avro 1.3.3 Specification} |
| * |
| * @package Avro |
| */ |
| class Avro |
| { |
| /** |
| * @var string version number of Avro specification to which |
| * this implemenation complies |
| */ |
| public const SPEC_VERSION = '1.4.0'; |
| |
| /**#@+ |
| * Constant to enumerate biginteger handling mode. |
| * GMP is used, if available, on 32-bit platforms. |
| */ |
| private const PHP_BIGINTEGER_MODE = 0x00; |
| private const GMP_BIGINTEGER_MODE = 0x01; |
| /**#@-*/ |
| /** |
| * @var int |
| * Mode used to handle bigintegers. After Avro::check64Bit() has been called, |
| * (usually via a call to Avro::checkPlatform(), set to |
| * self::GMP_BIGINTEGER_MODE on 32-bit platforms that have GMP available, |
| * and to self::PHP_BIGINTEGER_MODE otherwise. |
| */ |
| private static $biginteger_mode; |
| |
| /** |
| * Wrapper method to call each required check. |
| * |
| */ |
| public static function checkPlatform() |
| { |
| self::check64Bit(); |
| } |
| |
| /** |
| * Determines if the host platform can encode and decode long integer data. |
| * |
| * @throws AvroException if the platform cannot handle long integers. |
| */ |
| private static function check64Bit() |
| { |
| if (8 != PHP_INT_SIZE) { |
| if (extension_loaded('gmp')) { |
| self::$biginteger_mode = self::GMP_BIGINTEGER_MODE; |
| } else { |
| throw new AvroException('This platform cannot handle a 64-bit operations. ' |
| . 'Please install the GMP PHP extension.'); |
| } |
| } else { |
| self::$biginteger_mode = self::PHP_BIGINTEGER_MODE; |
| } |
| } |
| |
| /** |
| * @returns boolean true if the PHP GMP extension is used and false otherwise. |
| * @internal Requires Avro::check64Bit() (exposed via Avro::checkPlatform()) |
| * to have been called to set Avro::$biginteger_mode. |
| */ |
| public static function usesGmp() |
| { |
| return self::GMP_BIGINTEGER_MODE === self::$biginteger_mode; |
| } |
| } |