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Apache License
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# MaxMind DB Reader PHP API #
## Description ##
This is the PHP API for reading MaxMind DB files. MaxMind DB is a binary file
format that stores data indexed by IP address subnets (IPv4 or IPv6).
## Installation (Composer) ##
We recommend installing this package with [Composer](http://getcomposer.org/).
### Download Composer ###
To download Composer, run in the root directory of your project:
```bash
curl -sS https://getcomposer.org/installer | php
```
You should now have the file `composer.phar` in your project directory.
### Install Dependencies ###
Run in your project root:
```
php composer.phar require maxmind-db/reader:~1.0
```
You should now have the files `composer.json` and `composer.lock` as well as
the directory `vendor` in your project directory. If you use a version control
system, `composer.json` should be added to it.
### Require Autoloader ###
After installing the dependencies, you need to require the Composer autoloader
from your code:
```php
require 'vendor/autoload.php';
```
## Installation (Standalone) ##
If you don't want to use Composer for some reason, a custom
`autoload.php` is provided for you in the project root. To use the
library, simply include that file,
```php
require('/path/to/MaxMind-DB-Reader-php/autoload.php');
```
and then instantiate the reader class normally:
```php
use MaxMind\Db\Reader;
$reader = new Reader('example.mmdb');
```
## Usage ##
## Example ##
```php
<?php
require_once 'vendor/autoload.php';
use MaxMind\Db\Reader;
$ipAddress = '24.24.24.24';
$databaseFile = 'GeoIP2-City.mmdb';
$reader = new Reader($databaseFile);
print_r($reader->get($ipAddress));
$reader->close();
```
## Optional PHP C Extension ##
MaxMind provides an optional C extension that is a drop-in replacement for
`MaxMind\Db\Reader`. In order to use this extension, you must install the
Reader API as described above and install the extension as described below. If
you are using an autoloader, no changes to your code should be necessary.
### Installing Extension ###
First install [libmaxminddb](https://github.com/maxmind/libmaxminddb) as
described in its [README.md
file](https://github.com/maxmind/libmaxminddb/blob/master/README.md#installing-from-a-tarball).
After successfully installing libmaxmindb, run the following commands from the
top-level directory of this distribution:
```
cd ext
phpize
./configure
make
make test
sudo make install
```
You then must load your extension. The recommend method is to add the
following to your `php.ini` file:
```
extension=maxminddb.so
```
Note: You may need to install the PHP development package on your OS such as
php5-dev for Debian-based systems or php-devel for RedHat/Fedora-based ones.
## 128-bit Integer Support ##
The MaxMind DB format includes 128-bit unsigned integer as a type. Although
no MaxMind-distributed database currently makes use of this type, both the
pure PHP reader and the C extension support this type. The pure PHP reader
requires gmp or bcmath to read databases with 128-bit unsigned integers.
The integer is currently returned as a hexadecimal string (prefixed with "0x")
by the C extension and a decimal string (no prefix) by the pure PHP reader.
Any change to make the reader implementations always return either a
hexadecimal or decimal representation of the integer will NOT be considered a
breaking change.
## Support ##
Please report all issues with this code using the [GitHub issue tracker]
(https://github.com/maxmind/MaxMind-DB-Reader-php/issues).
If you are having an issue with a MaxMind service that is not specific to the
client API, please see [our support page](http://www.maxmind.com/en/support).
## Requirements ##
This library requires PHP 5.4 or greater. The pure PHP reader included is
compatible with HHVM.
The GMP or BCMath extension may be required to read some databases
using the pure PHP API.
## Contributing ##
Patches and pull requests are encouraged. All code should follow the PSR-1 and
PSR-2 style guidelines. Please include unit tests whenever possible.
## Versioning ##
The MaxMind DB Reader PHP API uses [Semantic Versioning](http://semver.org/).
## Copyright and License ##
This software is Copyright (c) 2014-2018 by MaxMind, Inc.
This is free software, licensed under the Apache License, Version 2.0.

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{
"name": "maxmind-db/reader",
"description": "MaxMind DB Reader API",
"keywords": ["database", "geoip", "geoip2", "geolocation", "maxmind"],
"homepage": "https://github.com/maxmind/MaxMind-DB-Reader-php",
"type": "library",
"license": "Apache-2.0",
"authors": [
{
"name": "Gregory J. Oschwald",
"email": "goschwald@maxmind.com",
"homepage": "http://www.maxmind.com/"
}
],
"require": {
"php": ">=5.4"
},
"suggest": {
"ext-bcmath": "bcmath or gmp is required for decoding larger integers with the pure PHP decoder",
"ext-gmp": "bcmath or gmp is required for decoding larger integers with the pure PHP decoder",
"ext-maxminddb": "A C-based database decoder that provides significantly faster lookups"
},
"require-dev": {
"friendsofphp/php-cs-fixer": "2.*",
"phpunit/phpunit": "4.* || 5.*",
"satooshi/php-coveralls": "1.0.*",
"squizlabs/php_codesniffer": "3.*"
},
"autoload": {
"psr-4": {
"MaxMind\\Db\\": "src/MaxMind/Db"
}
}
}

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<?php
namespace MaxMind\Db;
use MaxMind\Db\Reader\Decoder;
use MaxMind\Db\Reader\InvalidDatabaseException;
use MaxMind\Db\Reader\Metadata;
use MaxMind\Db\Reader\Util;
/**
* Instances of this class provide a reader for the MaxMind DB format. IP
* addresses can be looked up using the <code>get</code> method.
*/
class Reader
{
private static $DATA_SECTION_SEPARATOR_SIZE = 16;
private static $METADATA_START_MARKER = "\xAB\xCD\xEFMaxMind.com";
private static $METADATA_START_MARKER_LENGTH = 14;
private static $METADATA_MAX_SIZE = 131072; // 128 * 1024 = 128KB
private $decoder;
private $fileHandle;
private $fileSize;
private $ipV4Start;
private $metadata;
/**
* Constructs a Reader for the MaxMind DB format. The file passed to it must
* be a valid MaxMind DB file such as a GeoIp2 database file.
*
* @param string $database
* the MaxMind DB file to use
*
* @throws \InvalidArgumentException for invalid database path or unknown arguments
* @throws \MaxMind\Db\Reader\InvalidDatabaseException
* if the database is invalid or there is an error reading
* from it
*/
public function __construct($database)
{
if (\func_num_args() !== 1) {
throw new \InvalidArgumentException(
'The constructor takes exactly one argument.'
);
}
if (!is_readable($database)) {
throw new \InvalidArgumentException(
"The file \"$database\" does not exist or is not readable."
);
}
$this->fileHandle = @fopen($database, 'rb');
if ($this->fileHandle === false) {
throw new \InvalidArgumentException(
"Error opening \"$database\"."
);
}
$this->fileSize = @filesize($database);
if ($this->fileSize === false) {
throw new \UnexpectedValueException(
"Error determining the size of \"$database\"."
);
}
$start = $this->findMetadataStart($database);
$metadataDecoder = new Decoder($this->fileHandle, $start);
list($metadataArray) = $metadataDecoder->decode($start);
$this->metadata = new Metadata($metadataArray);
$this->decoder = new Decoder(
$this->fileHandle,
$this->metadata->searchTreeSize + self::$DATA_SECTION_SEPARATOR_SIZE
);
}
/**
* Looks up the <code>address</code> in the MaxMind DB.
*
* @param string $ipAddress
* the IP address to look up
*
* @throws \BadMethodCallException if this method is called on a closed database
* @throws \InvalidArgumentException if something other than a single IP address is passed to the method
* @throws InvalidDatabaseException
* if the database is invalid or there is an error reading
* from it
*
* @return array the record for the IP address
*/
public function get($ipAddress)
{
if (\func_num_args() !== 1) {
throw new \InvalidArgumentException(
'Method takes exactly one argument.'
);
}
if (!\is_resource($this->fileHandle)) {
throw new \BadMethodCallException(
'Attempt to read from a closed MaxMind DB.'
);
}
if (!filter_var($ipAddress, FILTER_VALIDATE_IP)) {
throw new \InvalidArgumentException(
"The value \"$ipAddress\" is not a valid IP address."
);
}
if ($this->metadata->ipVersion === 4 && strrpos($ipAddress, ':')) {
throw new \InvalidArgumentException(
"Error looking up $ipAddress. You attempted to look up an"
. ' IPv6 address in an IPv4-only database.'
);
}
$pointer = $this->findAddressInTree($ipAddress);
if ($pointer === 0) {
return null;
}
return $this->resolveDataPointer($pointer);
}
private function findAddressInTree($ipAddress)
{
// XXX - could simplify. Done as a byte array to ease porting
$rawAddress = array_merge(unpack('C*', inet_pton($ipAddress)));
$bitCount = \count($rawAddress) * 8;
// The first node of the tree is always node 0, at the beginning of the
// value
$node = $this->startNode($bitCount);
for ($i = 0; $i < $bitCount; ++$i) {
if ($node >= $this->metadata->nodeCount) {
break;
}
$tempBit = 0xFF & $rawAddress[$i >> 3];
$bit = 1 & ($tempBit >> 7 - ($i % 8));
$node = $this->readNode($node, $bit);
}
if ($node === $this->metadata->nodeCount) {
// Record is empty
return 0;
} elseif ($node > $this->metadata->nodeCount) {
// Record is a data pointer
return $node;
}
throw new InvalidDatabaseException('Something bad happened');
}
private function startNode($length)
{
// Check if we are looking up an IPv4 address in an IPv6 tree. If this
// is the case, we can skip over the first 96 nodes.
if ($this->metadata->ipVersion === 6 && $length === 32) {
return $this->ipV4StartNode();
}
// The first node of the tree is always node 0, at the beginning of the
// value
return 0;
}
private function ipV4StartNode()
{
// This is a defensive check. There is no reason to call this when you
// have an IPv4 tree.
if ($this->metadata->ipVersion === 4) {
return 0;
}
if ($this->ipV4Start) {
return $this->ipV4Start;
}
$node = 0;
for ($i = 0; $i < 96 && $node < $this->metadata->nodeCount; ++$i) {
$node = $this->readNode($node, 0);
}
$this->ipV4Start = $node;
return $node;
}
private function readNode($nodeNumber, $index)
{
$baseOffset = $nodeNumber * $this->metadata->nodeByteSize;
// XXX - probably could condense this.
switch ($this->metadata->recordSize) {
case 24:
$bytes = Util::read($this->fileHandle, $baseOffset + $index * 3, 3);
list(, $node) = unpack('N', "\x00" . $bytes);
return $node;
case 28:
$middleByte = Util::read($this->fileHandle, $baseOffset + 3, 1);
list(, $middle) = unpack('C', $middleByte);
if ($index === 0) {
$middle = (0xF0 & $middle) >> 4;
} else {
$middle = 0x0F & $middle;
}
$bytes = Util::read($this->fileHandle, $baseOffset + $index * 4, 3);
list(, $node) = unpack('N', \chr($middle) . $bytes);
return $node;
case 32:
$bytes = Util::read($this->fileHandle, $baseOffset + $index * 4, 4);
list(, $node) = unpack('N', $bytes);
return $node;
default:
throw new InvalidDatabaseException(
'Unknown record size: '
. $this->metadata->recordSize
);
}
}
private function resolveDataPointer($pointer)
{
$resolved = $pointer - $this->metadata->nodeCount
+ $this->metadata->searchTreeSize;
if ($resolved > $this->fileSize) {
throw new InvalidDatabaseException(
"The MaxMind DB file's search tree is corrupt"
);
}
list($data) = $this->decoder->decode($resolved);
return $data;
}
/*
* This is an extremely naive but reasonably readable implementation. There
* are much faster algorithms (e.g., Boyer-Moore) for this if speed is ever
* an issue, but I suspect it won't be.
*/
private function findMetadataStart($filename)
{
$handle = $this->fileHandle;
$fstat = fstat($handle);
$fileSize = $fstat['size'];
$marker = self::$METADATA_START_MARKER;
$markerLength = self::$METADATA_START_MARKER_LENGTH;
$metadataMaxLengthExcludingMarker
= min(self::$METADATA_MAX_SIZE, $fileSize) - $markerLength;
for ($i = 0; $i <= $metadataMaxLengthExcludingMarker; ++$i) {
for ($j = 0; $j < $markerLength; ++$j) {
fseek($handle, $fileSize - $i - $j - 1);
$matchBit = fgetc($handle);
if ($matchBit !== $marker[$markerLength - $j - 1]) {
continue 2;
}
}
return $fileSize - $i;
}
throw new InvalidDatabaseException(
"Error opening database file ($filename). " .
'Is this a valid MaxMind DB file?'
);
}
/**
* @throws \InvalidArgumentException if arguments are passed to the method
* @throws \BadMethodCallException if the database has been closed
*
* @return Metadata object for the database
*/
public function metadata()
{
if (\func_num_args()) {
throw new \InvalidArgumentException(
'Method takes no arguments.'
);
}
// Not technically required, but this makes it consistent with
// C extension and it allows us to change our implementation later.
if (!\is_resource($this->fileHandle)) {
throw new \BadMethodCallException(
'Attempt to read from a closed MaxMind DB.'
);
}
return $this->metadata;
}
/**
* Closes the MaxMind DB and returns resources to the system.
*
* @throws \Exception
* if an I/O error occurs
*/
public function close()
{
if (!\is_resource($this->fileHandle)) {
throw new \BadMethodCallException(
'Attempt to close a closed MaxMind DB.'
);
}
fclose($this->fileHandle);
}
}

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<?php
namespace MaxMind\Db\Reader;
// @codingStandardsIgnoreLine
// We subtract 1 from the log to protect against precision loss.
\define(__NAMESPACE__ . '\_MM_MAX_INT_BYTES', (log(PHP_INT_MAX, 2) - 1) / 8);
class Decoder
{
private $fileStream;
private $pointerBase;
private $pointerBaseByteSize;
// This is only used for unit testing
private $pointerTestHack;
private $switchByteOrder;
const _EXTENDED = 0;
const _POINTER = 1;
const _UTF8_STRING = 2;
const _DOUBLE = 3;
const _BYTES = 4;
const _UINT16 = 5;
const _UINT32 = 6;
const _MAP = 7;
const _INT32 = 8;
const _UINT64 = 9;
const _UINT128 = 10;
const _ARRAY = 11;
const _CONTAINER = 12;
const _END_MARKER = 13;
const _BOOLEAN = 14;
const _FLOAT = 15;
public function __construct(
$fileStream,
$pointerBase = 0,
$pointerTestHack = false
) {
$this->fileStream = $fileStream;
$this->pointerBase = $pointerBase;
$this->pointerBaseByteSize = $pointerBase > 0 ? log($pointerBase, 2) / 8 : 0;
$this->pointerTestHack = $pointerTestHack;
$this->switchByteOrder = $this->isPlatformLittleEndian();
}
public function decode($offset)
{
list(, $ctrlByte) = unpack(
'C',
Util::read($this->fileStream, $offset, 1)
);
++$offset;
$type = $ctrlByte >> 5;
// Pointers are a special case, we don't read the next $size bytes, we
// use the size to determine the length of the pointer and then follow
// it.
if ($type === self::_POINTER) {
list($pointer, $offset) = $this->decodePointer($ctrlByte, $offset);
// for unit testing
if ($this->pointerTestHack) {
return [$pointer];
}
list($result) = $this->decode($pointer);
return [$result, $offset];
}
if ($type === self::_EXTENDED) {
list(, $nextByte) = unpack(
'C',
Util::read($this->fileStream, $offset, 1)
);
$type = $nextByte + 7;
if ($type < 8) {
throw new InvalidDatabaseException(
'Something went horribly wrong in the decoder. An extended type '
. 'resolved to a type number < 8 ('
. $type
. ')'
);
}
++$offset;
}
list($size, $offset) = $this->sizeFromCtrlByte($ctrlByte, $offset);
return $this->decodeByType($type, $offset, $size);
}
private function decodeByType($type, $offset, $size)
{
switch ($type) {
case self::_MAP:
return $this->decodeMap($size, $offset);
case self::_ARRAY:
return $this->decodeArray($size, $offset);
case self::_BOOLEAN:
return [$this->decodeBoolean($size), $offset];
}
$newOffset = $offset + $size;
$bytes = Util::read($this->fileStream, $offset, $size);
switch ($type) {
case self::_BYTES:
case self::_UTF8_STRING:
return [$bytes, $newOffset];
case self::_DOUBLE:
$this->verifySize(8, $size);
return [$this->decodeDouble($bytes), $newOffset];
case self::_FLOAT:
$this->verifySize(4, $size);
return [$this->decodeFloat($bytes), $newOffset];
case self::_INT32:
return [$this->decodeInt32($bytes, $size), $newOffset];
case self::_UINT16:
case self::_UINT32:
case self::_UINT64:
case self::_UINT128:
return [$this->decodeUint($bytes, $size), $newOffset];
default:
throw new InvalidDatabaseException(
'Unknown or unexpected type: ' . $type
);
}
}
private function verifySize($expected, $actual)
{
if ($expected !== $actual) {
throw new InvalidDatabaseException(
"The MaxMind DB file's data section contains bad data (unknown data type or corrupt data)"
);
}
}
private function decodeArray($size, $offset)
{
$array = [];
for ($i = 0; $i < $size; ++$i) {
list($value, $offset) = $this->decode($offset);
array_push($array, $value);
}
return [$array, $offset];
}
private function decodeBoolean($size)
{
return $size === 0 ? false : true;
}
private function decodeDouble($bits)
{
// This assumes IEEE 754 doubles, but most (all?) modern platforms
// use them.
//
// We are not using the "E" format as that was only added in
// 7.0.15 and 7.1.1. As such, we must switch byte order on
// little endian machines.
list(, $double) = unpack('d', $this->maybeSwitchByteOrder($bits));
return $double;
}
private function decodeFloat($bits)
{
// This assumes IEEE 754 floats, but most (all?) modern platforms
// use them.
//
// We are not using the "G" format as that was only added in
// 7.0.15 and 7.1.1. As such, we must switch byte order on
// little endian machines.
list(, $float) = unpack('f', $this->maybeSwitchByteOrder($bits));
return $float;
}
private function decodeInt32($bytes, $size)
{
switch ($size) {
case 0:
return 0;
case 1:
case 2:
case 3:
$bytes = str_pad($bytes, 4, "\x00", STR_PAD_LEFT);
break;
case 4:
break;
default:
throw new InvalidDatabaseException(
"The MaxMind DB file's data section contains bad data (unknown data type or corrupt data)"
);
}
list(, $int) = unpack('l', $this->maybeSwitchByteOrder($bytes));
return $int;
}
private function decodeMap($size, $offset)
{
$map = [];
for ($i = 0; $i < $size; ++$i) {
list($key, $offset) = $this->decode($offset);
list($value, $offset) = $this->decode($offset);
$map[$key] = $value;
}
return [$map, $offset];
}
private function decodePointer($ctrlByte, $offset)
{
$pointerSize = (($ctrlByte >> 3) & 0x3) + 1;
$buffer = Util::read($this->fileStream, $offset, $pointerSize);
$offset = $offset + $pointerSize;
switch ($pointerSize) {
case 1:
$packed = (pack('C', $ctrlByte & 0x7)) . $buffer;
list(, $pointer) = unpack('n', $packed);
$pointer += $this->pointerBase;
break;
case 2:
$packed = "\x00" . (pack('C', $ctrlByte & 0x7)) . $buffer;
list(, $pointer) = unpack('N', $packed);
$pointer += $this->pointerBase + 2048;
break;
case 3:
$packed = (pack('C', $ctrlByte & 0x7)) . $buffer;
// It is safe to use 'N' here, even on 32 bit machines as the
// first bit is 0.
list(, $pointer) = unpack('N', $packed);
$pointer += $this->pointerBase + 526336;
break;
case 4:
// We cannot use unpack here as we might overflow on 32 bit
// machines
$pointerOffset = $this->decodeUint($buffer, $pointerSize);
$byteLength = $pointerSize + $this->pointerBaseByteSize;
if ($byteLength <= _MM_MAX_INT_BYTES) {
$pointer = $pointerOffset + $this->pointerBase;
} elseif (\extension_loaded('gmp')) {
$pointer = gmp_strval(gmp_add($pointerOffset, $this->pointerBase));
} elseif (\extension_loaded('bcmath')) {
$pointer = bcadd($pointerOffset, $this->pointerBase);
} else {
throw new \RuntimeException(
'The gmp or bcmath extension must be installed to read this database.'
);
}
}
return [$pointer, $offset];
}
private function decodeUint($bytes, $byteLength)
{
if ($byteLength === 0) {
return 0;
}
$integer = 0;
for ($i = 0; $i < $byteLength; ++$i) {
$part = \ord($bytes[$i]);
// We only use gmp or bcmath if the final value is too big
if ($byteLength <= _MM_MAX_INT_BYTES) {
$integer = ($integer << 8) + $part;
} elseif (\extension_loaded('gmp')) {
$integer = gmp_strval(gmp_add(gmp_mul($integer, 256), $part));
} elseif (\extension_loaded('bcmath')) {
$integer = bcadd(bcmul($integer, 256), $part);
} else {
throw new \RuntimeException(
'The gmp or bcmath extension must be installed to read this database.'
);
}
}
return $integer;
}
private function sizeFromCtrlByte($ctrlByte, $offset)
{
$size = $ctrlByte & 0x1f;
if ($size < 29) {
return [$size, $offset];
}
$bytesToRead = $size - 28;
$bytes = Util::read($this->fileStream, $offset, $bytesToRead);
if ($size === 29) {
$size = 29 + \ord($bytes);
} elseif ($size === 30) {
list(, $adjust) = unpack('n', $bytes);
$size = 285 + $adjust;
} elseif ($size > 30) {
list(, $adjust) = unpack('N', "\x00" . $bytes);
$size = ($adjust & (0x0FFFFFFF >> (32 - (8 * $bytesToRead))))
+ 65821;
}
return [$size, $offset + $bytesToRead];
}
private function maybeSwitchByteOrder($bytes)
{
return $this->switchByteOrder ? strrev($bytes) : $bytes;
}
private function isPlatformLittleEndian()
{
$testint = 0x00FF;
$packed = pack('S', $testint);
return $testint === current(unpack('v', $packed));
}
}

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msd2/tracking/piwik/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/InvalidDatabaseException.php vendored Normal file
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<?php
namespace MaxMind\Db\Reader;
/**
* This class should be thrown when unexpected data is found in the database.
*/
class InvalidDatabaseException extends \Exception
{
}

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msd2/tracking/piwik/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/Metadata.php vendored Normal file
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<?php
namespace MaxMind\Db\Reader;
/**
* This class provides the metadata for the MaxMind DB file.
*
* @property int nodeCount This is an unsigned 32-bit integer indicating
* the number of nodes in the search tree.
* @property int recordSize This is an unsigned 16-bit integer. It
* indicates the number of bits in a record in the search tree. Note that each
* node consists of two records.
* @property int ipVersion This is an unsigned 16-bit integer which is
* always 4 or 6. It indicates whether the database contains IPv4 or IPv6
* address data.
* @property string databaseType This is a string that indicates the structure
* of each data record associated with an IP address. The actual definition of
* these structures is left up to the database creator.
* @property array languages An array of strings, each of which is a language
* code. A given record may contain data items that have been localized to
* some or all of these languages. This may be undefined.
* @property int binaryFormatMajorVersion This is an unsigned 16-bit
* integer indicating the major version number for the database's binary
* format.
* @property int binaryFormatMinorVersion This is an unsigned 16-bit
* integer indicating the minor version number for the database's binary format.
* @property int buildEpoch This is an unsigned 64-bit integer that
* contains the database build timestamp as a Unix epoch value.
* @property array description This key will always point to a map
* (associative array). The keys of that map will be language codes, and the
* values will be a description in that language as a UTF-8 string. May be
* undefined for some databases.
*/
class Metadata
{
private $binaryFormatMajorVersion;
private $binaryFormatMinorVersion;
private $buildEpoch;
private $databaseType;
private $description;
private $ipVersion;
private $languages;
private $nodeByteSize;
private $nodeCount;
private $recordSize;
private $searchTreeSize;
public function __construct($metadata)
{
$this->binaryFormatMajorVersion =
$metadata['binary_format_major_version'];
$this->binaryFormatMinorVersion =
$metadata['binary_format_minor_version'];
$this->buildEpoch = $metadata['build_epoch'];
$this->databaseType = $metadata['database_type'];
$this->languages = $metadata['languages'];
$this->description = $metadata['description'];
$this->ipVersion = $metadata['ip_version'];
$this->nodeCount = $metadata['node_count'];
$this->recordSize = $metadata['record_size'];
$this->nodeByteSize = $this->recordSize / 4;
$this->searchTreeSize = $this->nodeCount * $this->nodeByteSize;
}
public function __get($var)
{
return $this->$var;
}
}

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msd2/tracking/piwik/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/Util.php vendored Normal file
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<?php
namespace MaxMind\Db\Reader;
class Util
{
public static function read($stream, $offset, $numberOfBytes)
{
if ($numberOfBytes === 0) {
return '';
}
if (fseek($stream, $offset) === 0) {
$value = fread($stream, $numberOfBytes);
// We check that the number of bytes read is equal to the number
// asked for. We use ftell as getting the length of $value is
// much slower.
if (ftell($stream) - $offset === $numberOfBytes) {
return $value;
}
}
throw new InvalidDatabaseException(
'The MaxMind DB file contains bad data'
);
}
}