mirror of
https://github.com/php/php-src.git
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100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 4 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2002 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.02 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available at through the world-wide-web at |
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| http://www.php.net/license/2_02.txt. |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Stig Sæther Bakken <ssb@fast.no> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include <stdlib.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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#ifdef PHP_WIN32
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#include "win32/time.h"
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#else
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#include <sys/time.h>
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#endif
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#include "php_lcg.h"
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#include "uniqid.h"
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/* {{{ proto string uniqid(string prefix [, bool more_entropy])
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Generates a unique ID */
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PHP_FUNCTION(uniqid)
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{
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#ifdef HAVE_GETTIMEOFDAY
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char *prefix;
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zend_bool more_entropy = 0;
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char uniqid[138];
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int sec, usec, argc, prefix_len;
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struct timeval tv;
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argc = ZEND_NUM_ARGS();
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if (zend_parse_parameters(argc TSRMLS_CC, "s|b", &prefix, &prefix_len,
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&more_entropy)) {
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return;
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}
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/* Do some bounds checking since we are using a char array. */
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if (prefix_len > 114) {
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php_error(E_WARNING, "The prefix to uniqid should not be more than 114 characters.");
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return;
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}
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#if HAVE_USLEEP && !defined(PHP_WIN32)
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if (!more_entropy) {
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usleep(1);
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}
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#endif
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gettimeofday((struct timeval *) &tv, (struct timezone *) NULL);
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sec = (int) tv.tv_sec;
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usec = (int) (tv.tv_usec % 1000000);
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/* The max value usec can have is 0xF423F, so we use only five hex
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* digits for usecs.
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*/
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if (more_entropy) {
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sprintf(uniqid, "%s%08x%05x%.8f", prefix, sec, usec, php_combined_lcg(TSRMLS_C) * 10);
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} else {
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sprintf(uniqid, "%s%08x%05x", prefix, sec, usec);
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}
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RETURN_STRING(uniqid, 1);
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#endif
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}
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/* }}} */
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function_entry uniqid_functions[] = {
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PHP_FE(uniqid, NULL)
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{NULL, NULL, NULL}
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};
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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