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<?php
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/**
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* @file
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* Enables ctools generated modules to use UUIDs without the UUID module enabled.
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* Per the ctools.module, this file only gets included if UUID doesn't exist.
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*/
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/**
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* Pattern for detecting a valid UUID.
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*/
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if (!defined('UUID_PATTERN')) {
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define('UUID_PATTERN', '[0-9a-f]{8}-([0-9a-f]{4}-){3}[0-9a-f]{12}');
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}
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/**
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* Generates a UUID using the Windows internal GUID generator.
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*
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* @see http://php.net/com_create_guid
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*/
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function _ctools_uuid_generate_com() {
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// Remove {} wrapper and make lower case to keep result consistent.
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return drupal_strtolower(trim(com_create_guid(), '{}'));
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}
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/**
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* Generates an universally unique identifier using the PECL extension.
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*/
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function _ctools_uuid_generate_pecl() {
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$uuid_type = UUID_TYPE_DEFAULT;
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return uuid_create($uuid_type);
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}
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/**
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* Generates a UUID v4 using PHP code.
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*
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* Based on code from @see http://php.net/uniqid#65879 , but corrected.
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*/
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function _ctools_uuid_generate_php() {
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// The field names refer to RFC 4122 section 4.1.2.
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return sprintf('%04x%04x-%04x-4%03x-%04x-%04x%04x%04x',
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// 32 bits for "time_low".
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mt_rand(0, 65535), mt_rand(0, 65535),
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// 16 bits for "time_mid".
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mt_rand(0, 65535),
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// 12 bits after the 0100 of (version) 4 for "time_hi_and_version".
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mt_rand(0, 4095),
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bindec(substr_replace(sprintf('%016b', mt_rand(0, 65535)), '10', 0, 2)),
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// 8 bits, the last two of which (positions 6 and 7) are 01, for "clk_seq_hi_res"
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// (hence, the 2nd hex digit after the 3rd hyphen can only be 1, 5, 9 or d)
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// 8 bits for "clk_seq_low" 48 bits for "node".
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mt_rand(0, 65535), mt_rand(0, 65535), mt_rand(0, 65535)
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);
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}
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// This is wrapped in an if block to avoid conflicts with PECL's uuid_is_valid().
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/**
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* Check that a string appears to be in the format of a UUID.
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*
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* @param $uuid
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* The string to test.
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*
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* @return
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* TRUE if the string is well formed.
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*/
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if (!function_exists('uuid_is_valid')) {
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function uuid_is_valid($uuid) {
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return preg_match('/^' . UUID_PATTERN . '$/', $uuid);
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}
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}
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