/*
+----------------------------------------------------------------------+
| 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 */
