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php_scrypt_utils.c
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php_scrypt_utils.c
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/*-
* Copyright 2012 Dominic Black
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "php_scrypt_utils.h"
#include "php_scrypt.h"
#include "zend_exceptions.h"
/*
* Casts a long into a uint64_t.
*
* Throws a php error if the value is out of bounds and will return 0.
*/
uint64_t clampAndCast64(uint32_t argNum, const char *argName, long value, long min)
{
if (value <= min)
{
#if PHP_VERSION_ID >= 80000
zend_argument_error(NULL, argNum, "must be greater than %ld", min);
#else
zend_throw_error(zend_ce_error, "scrypt(): Argument #%d ($%s) must be greater than %ld", argNum, argName, min);
#endif
return 0;
} else if (value > UINT64_MAX) {
#if PHP_VERSION_ID >= 80000
zend_argument_error(NULL, argNum, "is too large");
#else
zend_throw_error(zend_ce_error, "scrypt(): Argument #%d ($%s) is too large", argNum, argName);
#endif
return 0;
}
return (uint64_t)value;
}
/*
* Casts a long into a uint32_t.
*
* Throws an exception if the value is out of bounds and will return -1.
*/
uint32_t clampAndCast32(uint32_t argNum, const char *argName, long value, long min)
{
if (value <= min)
{
#if PHP_VERSION_ID >= 80000
zend_argument_error(NULL, argNum, "must be greater than %ld", min);
#else
zend_throw_error(zend_ce_error, "scrypt(): Argument #%d ($%s) must be greater than %ld", argNum, argName, min);
#endif
return -1;
} else if (value > UINT32_MAX) {
#if PHP_VERSION_ID >= 80000
zend_argument_error(NULL, argNum, "is too large");
#else
zend_throw_error(zend_ce_error, "scrypt(): Argument #%d ($%s) is too large", argNum, argName);
#endif
return -1;
}
return (uint32_t)value;
}
/*
* Checks if the given number is a power of two
*/
uint64_t isPowerOfTwo(uint64_t N)
{
return N & (N - 1);
}