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|
/*
+----------------------------------------------------------------------+
| PHP HTML Embedded Scripting Language Version 3.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2000 PHP Development Team (See Credits file) |
+----------------------------------------------------------------------+
| This program is free software; you can redistribute it and/or modify |
| it under the terms of one of the following licenses: |
| |
| A) the GNU General Public License as published by the Free Software |
| Foundation; either version 2 of the License, or (at your option) |
| any later version. |
| |
| B) the PHP License as published by the PHP Development Team and |
| included in the distribution in the file: LICENSE |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of both licenses referred to here. |
| If you did not, or have any questions about PHP licensing, please |
| contact core@php.net. |
+----------------------------------------------------------------------+
| Author: Stig Sther Bakken <ssb@fast.no> |
+----------------------------------------------------------------------+
*/
/* $Id: uniqid.c,v 1.41 2000/02/22 15:13:57 eschmid Exp $ */
#include "php.h"
#include "internal_functions.h"
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include <errno.h>
#include <stdio.h>
#if MSVC5
#include "win32/time.h"
#else
#include <sys/time.h>
#endif
#include "php_lcg.h"
#include "uniqid.h"
#define MORE_ENTROPY (argc == 2 && flags->value.lval)
/* {{{ proto string uniqid(string prefix [, bool more_entropy])
Generate a unique id */
PHP_FUNCTION(uniqid)
{
#ifdef HAVE_GETTIMEOFDAY
pval *prefix, *flags;
char uniqid[138];
int sec, usec, argc;
struct timeval tv;
TLS_VARS;
argc = ARG_COUNT(ht);
if (argc < 1 || argc > 2 || getParameters(ht,argc,&prefix,&flags)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string(prefix);
if (argc == 2) {
convert_to_long(flags);
}
/* Do some bounds checking since we are using a char array. */
if (strlen(prefix->value.str.val) > 114) {
php3_error(E_WARNING, "The prefix to uniqid should not be more than 114 characters.");
return;
}
#if HAVE_USLEEP && !(WIN32|WINNT)
if (!MORE_ENTROPY) {
usleep(1);
}
#endif
gettimeofday((struct timeval *) &tv, (struct timezone *) NULL);
sec = (int) tv.tv_sec;
usec = (int) (tv.tv_usec % 1000000);
/* The max value usec can have is 0xF423F, so we use only five hex
* digits for usecs:
*/
if (MORE_ENTROPY) {
sprintf(uniqid, "%s%08x%05x%.8f", prefix->value.str.val, sec, usec, php_combined_lcg() * 10);
} else {
sprintf(uniqid, "%s%08x%05x", prefix->value.str.val, sec, usec);
}
RETURN_STRING(uniqid,1);
#endif
}
/* }}} */
function_entry uniqid_functions[] = {
{"uniqid", php3_uniqid, NULL},
{NULL, NULL, NULL}
};
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/
|
