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zend_range_check.h
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1/*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Anatol Belski <ab@php.net> |
16 +----------------------------------------------------------------------+
17*/
18
19#ifndef ZEND_RANGE_CHECK_H
20#define ZEND_RANGE_CHECK_H
21
22#include "zend_long.h"
23
24/* Flag macros for basic range recognition. Notable is that
25 always sizeof(signed) == sizeof(unsigned), so no need to
26 overcomplicate things. */
27#if SIZEOF_INT < SIZEOF_ZEND_LONG
28# define ZEND_LONG_CAN_OVFL_INT 1
29# define ZEND_LONG_CAN_OVFL_UINT 1
30#endif
31
32#if SIZEOF_INT < SIZEOF_SIZE_T
33/* size_t can always overflow signed int on the same platform.
34 Furthermore, by the current design, size_t can always
35 overflow zend_long. */
36# define ZEND_SIZE_T_CAN_OVFL_UINT 1
37#endif
38
39
40/* zend_long vs. (unsigned) int checks. */
41#ifdef ZEND_LONG_CAN_OVFL_INT
42# define ZEND_LONG_INT_OVFL(zlong) UNEXPECTED((zlong) > (zend_long)INT_MAX)
43# define ZEND_LONG_INT_UDFL(zlong) UNEXPECTED((zlong) < (zend_long)INT_MIN)
44# define ZEND_LONG_EXCEEDS_INT(zlong) UNEXPECTED(ZEND_LONG_INT_OVFL(zlong) || ZEND_LONG_INT_UDFL(zlong))
45# define ZEND_LONG_UINT_OVFL(zlong) UNEXPECTED((zlong) < 0 || (zlong) > (zend_long)UINT_MAX)
46#else
47# define ZEND_LONG_INT_OVFL(zl) (0)
48# define ZEND_LONG_INT_UDFL(zl) (0)
49# define ZEND_LONG_EXCEEDS_INT(zlong) (0)
50# define ZEND_LONG_UINT_OVFL(zl) (0)
51#endif
52
53/* size_t vs (unsigned) int checks. */
54#define ZEND_SIZE_T_INT_OVFL(size) UNEXPECTED((size) > (size_t)INT_MAX)
55#ifdef ZEND_SIZE_T_CAN_OVFL_UINT
56# define ZEND_SIZE_T_UINT_OVFL(size) UNEXPECTED((size) > (size_t)UINT_MAX)
57#else
58# define ZEND_SIZE_T_UINT_OVFL(size) (0)
59#endif
60
61/* Comparison zend_long vs size_t */
62#define ZEND_SIZE_T_GT_ZEND_LONG(size, zlong) ((zlong) < 0 || (size) > (size_t)(zlong))
63#define ZEND_SIZE_T_GTE_ZEND_LONG(size, zlong) ((zlong) < 0 || (size) >= (size_t)(zlong))
64#define ZEND_SIZE_T_LT_ZEND_LONG(size, zlong) ((zlong) >= 0 && (size) < (size_t)(zlong))
65#define ZEND_SIZE_T_LTE_ZEND_LONG(size, zlong) ((zlong) >= 0 && (size) <= (size_t)(zlong))
66
67#endif /* ZEND_RANGE_CHECK_H */
zend_long.h