mirror of
https://github.com/php/php-src.git
synced 2024-12-01 13:54:10 +08:00
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| PHP Version 5 |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1997-2014 The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 3.01 of the PHP license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.php.net/license/3_01.txt |
|
|
| If you did not receive a copy of the PHP license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@php.net so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Author: Stig Sæther Bakken <ssb@php.net> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
/* $Id$ */
|
|
|
|
#include "php.h"
|
|
|
|
#include <stdlib.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include <stdio.h>
|
|
#ifdef PHP_WIN32
|
|
#include "win32/time.h"
|
|
#else
|
|
#include <sys/time.h>
|
|
#endif
|
|
|
|
#include "php_lcg.h"
|
|
#include "uniqid.h"
|
|
|
|
/* {{{ proto string uniqid([string prefix [, bool more_entropy]])
|
|
Generates a unique ID */
|
|
#ifdef HAVE_GETTIMEOFDAY
|
|
PHP_FUNCTION(uniqid)
|
|
{
|
|
char *prefix = "";
|
|
#if defined(__CYGWIN__)
|
|
zend_bool more_entropy = 1;
|
|
#else
|
|
zend_bool more_entropy = 0;
|
|
#endif
|
|
char *uniqid;
|
|
int sec, usec, prefix_len = 0;
|
|
struct timeval tv;
|
|
|
|
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sb", &prefix, &prefix_len,
|
|
&more_entropy)) {
|
|
return;
|
|
}
|
|
|
|
#if HAVE_USLEEP && !defined(PHP_WIN32)
|
|
if (!more_entropy) {
|
|
#if defined(__CYGWIN__)
|
|
php_error_docref(NULL TSRMLS_CC, E_WARNING, "You must use 'more entropy' under CYGWIN");
|
|
RETURN_FALSE;
|
|
#else
|
|
usleep(1);
|
|
#endif
|
|
}
|
|
#endif
|
|
gettimeofday((struct timeval *) &tv, (struct timezone *) NULL);
|
|
sec = (int) tv.tv_sec;
|
|
usec = (int) (tv.tv_usec % 0x100000);
|
|
|
|
/* The max value usec can have is 0xF423F, so we use only five hex
|
|
* digits for usecs.
|
|
*/
|
|
if (more_entropy) {
|
|
spprintf(&uniqid, 0, "%s%08x%05x%.8F", prefix, sec, usec, php_combined_lcg(TSRMLS_C) * 10);
|
|
} else {
|
|
spprintf(&uniqid, 0, "%s%08x%05x", prefix, sec, usec);
|
|
}
|
|
|
|
RETURN_STRING(uniqid, 0);
|
|
}
|
|
#endif
|
|
/* }}} */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
* vim600: sw=4 ts=4 fdm=marker
|
|
* vim<600: sw=4 ts=4
|
|
*/
|