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 */ 68
