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1.1 ! misho 1: /* ! 2: +----------------------------------------------------------------------+ ! 3: | PHP Version 5 | ! 4: +----------------------------------------------------------------------+ ! 5: | Copyright (c) 1997-2012 The PHP Group | ! 6: +----------------------------------------------------------------------+ ! 7: | This source file is subject to version 3.01 of the PHP license, | ! 8: | that is bundled with this package in the file LICENSE, and is | ! 9: | available through the world-wide-web at the following url: | ! 10: | http://www.php.net/license/3_01.txt | ! 11: | If you did not receive a copy of the PHP license and are unable to | ! 12: | obtain it through the world-wide-web, please send a note to | ! 13: | license@php.net so we can mail you a copy immediately. | ! 14: +----------------------------------------------------------------------+ ! 15: | Author: Stig Sæther Bakken <ssb@php.net> | ! 16: +----------------------------------------------------------------------+ ! 17: */ ! 18: ! 19: /* $Id: uniqid.c 321634 2012-01-01 13:15:04Z felipe $ */ ! 20: ! 21: #include "php.h" ! 22: ! 23: #include <stdlib.h> ! 24: #if HAVE_UNISTD_H ! 25: #include <unistd.h> ! 26: #endif ! 27: ! 28: #include <string.h> ! 29: #include <errno.h> ! 30: ! 31: #include <stdio.h> ! 32: #ifdef PHP_WIN32 ! 33: #include "win32/time.h" ! 34: #else ! 35: #include <sys/time.h> ! 36: #endif ! 37: ! 38: #include "php_lcg.h" ! 39: #include "uniqid.h" ! 40: ! 41: /* {{{ proto string uniqid([string prefix [, bool more_entropy]]) ! 42: Generates a unique ID */ ! 43: #ifdef HAVE_GETTIMEOFDAY ! 44: PHP_FUNCTION(uniqid) ! 45: { ! 46: char *prefix = ""; ! 47: #if defined(__CYGWIN__) ! 48: zend_bool more_entropy = 1; ! 49: #else ! 50: zend_bool more_entropy = 0; ! 51: #endif ! 52: char *uniqid; ! 53: int sec, usec, prefix_len = 0; ! 54: struct timeval tv; ! 55: ! 56: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sb", &prefix, &prefix_len, ! 57: &more_entropy)) { ! 58: return; ! 59: } ! 60: ! 61: #if HAVE_USLEEP && !defined(PHP_WIN32) ! 62: if (!more_entropy) { ! 63: #if defined(__CYGWIN__) ! 64: php_error_docref(NULL TSRMLS_CC, E_WARNING, "You must use 'more entropy' under CYGWIN"); ! 65: RETURN_FALSE; ! 66: #else ! 67: usleep(1); ! 68: #endif ! 69: } ! 70: #endif ! 71: gettimeofday((struct timeval *) &tv, (struct timezone *) NULL); ! 72: sec = (int) tv.tv_sec; ! 73: usec = (int) (tv.tv_usec % 0x100000); ! 74: ! 75: /* The max value usec can have is 0xF423F, so we use only five hex ! 76: * digits for usecs. ! 77: */ ! 78: if (more_entropy) { ! 79: spprintf(&uniqid, 0, "%s%08x%05x%.8F", prefix, sec, usec, php_combined_lcg(TSRMLS_C) * 10); ! 80: } else { ! 81: spprintf(&uniqid, 0, "%s%08x%05x", prefix, sec, usec); ! 82: } ! 83: ! 84: RETURN_STRING(uniqid, 0); ! 85: } ! 86: #endif ! 87: /* }}} */ ! 88: ! 89: /* ! 90: * Local variables: ! 91: * tab-width: 4 ! 92: * c-basic-offset: 4 ! 93: * End: ! 94: * vim600: sw=4 ts=4 fdm=marker ! 95: * vim<600: sw=4 ts=4 ! 96: */