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zend_range_check.h
/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) | +----------------------------------------------------------------------+ | This source file is subject to version 2.00 of the Zend license, | | that is bundled with this package in the file LICENSE, and is | | available through the world-wide-web at the following url: | | http://www.zend.com/license/2_00.txt. | | If you did not receive a copy of the Zend license and are unable to | | obtain it through the world-wide-web, please send a note to | | license@zend.com so we can mail you a copy immediately. | +----------------------------------------------------------------------+ | Authors: Anatol Belski <ab@php.net> | +----------------------------------------------------------------------+ */ #ifndef ZEND_RANGE_CHECK_H #define ZEND_RANGE_CHECK_H #include "zend_long.h" /* Flag macros for basic range recognition. Notable is that always sizeof(signed) == sizeof(unsigned), so no need to overcomplicate things. */ #if SIZEOF_INT < SIZEOF_ZEND_LONG # define ZEND_LONG_CAN_OVFL_INT 1 # define ZEND_LONG_CAN_OVFL_UINT 1 #endif #if SIZEOF_INT < SIZEOF_SIZE_T /* size_t can always overflow signed int on the same platform. Furthermore, by the current design, size_t can always overflow zend_long. */ # define ZEND_SIZE_T_CAN_OVFL_UINT 1 #endif /* zend_long vs. (unsigned) int checks. */ #ifdef ZEND_LONG_CAN_OVFL_INT # define ZEND_LONG_INT_OVFL(zlong) UNEXPECTED((zlong) > (zend_long)INT_MAX) # define ZEND_LONG_INT_UDFL(zlong) UNEXPECTED((zlong) < (zend_long)INT_MIN) # define ZEND_LONG_EXCEEDS_INT(zlong) UNEXPECTED(ZEND_LONG_INT_OVFL(zlong) || ZEND_LONG_INT_UDFL(zlong)) # define ZEND_LONG_UINT_OVFL(zlong) UNEXPECTED((zlong) < 0 || (zlong) > (zend_long)UINT_MAX) #else # define ZEND_LONG_INT_OVFL(zl) (0) # define ZEND_LONG_INT_UDFL(zl) (0) # define ZEND_LONG_EXCEEDS_INT(zlong) (0) # define ZEND_LONG_UINT_OVFL(zl) (0) #endif /* size_t vs (unsigned) int checks. */ #define ZEND_SIZE_T_INT_OVFL(size) UNEXPECTED((size) > (size_t)INT_MAX) #ifdef ZEND_SIZE_T_CAN_OVFL_UINT # define ZEND_SIZE_T_UINT_OVFL(size) UNEXPECTED((size) > (size_t)UINT_MAX) #else # define ZEND_SIZE_T_UINT_OVFL(size) (0) #endif /* Comparison zend_long vs size_t */ #define ZEND_SIZE_T_GT_ZEND_LONG(size, zlong) ((zlong) < 0 || (size) > (size_t)(zlong)) #define ZEND_SIZE_T_GTE_ZEND_LONG(size, zlong) ((zlong) < 0 || (size) >= (size_t)(zlong)) #define ZEND_SIZE_T_LT_ZEND_LONG(size, zlong) ((zlong) >= 0 && (size) < (size_t)(zlong)) #define ZEND_SIZE_T_LTE_ZEND_LONG(size, zlong) ((zlong) >= 0 && (size) <= (size_t)(zlong)) #endif /* ZEND_RANGE_CHECK_H */
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