universe@483: /*
universe@483:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@483:  *
universe@483:  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
universe@483:  *
universe@483:  * Redistribution and use in source and binary forms, with or without
universe@483:  * modification, are permitted provided that the following conditions are met:
universe@483:  *
universe@483:  *   1. Redistributions of source code must retain the above copyright
universe@483:  *      notice, this list of conditions and the following disclaimer.
universe@483:  *
universe@483:  *   2. Redistributions in binary form must reproduce the above copyright
universe@483:  *      notice, this list of conditions and the following disclaimer in the
universe@483:  *      documentation and/or other materials provided with the distribution.
universe@483:  *
universe@483:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@483:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@483:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@483:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@483:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@483:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@483:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@483:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@483:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@483:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@483:  * POSSIBILITY OF SUCH DAMAGE.
universe@483:  */
universe@483: 
universe@483: #include "cx/utils.h"
universe@483: 
universe@483: #ifndef CX_SZMUL_BUILTIN
universe@483: int cx_szmul_impl(size_t a, size_t b, size_t *result) {
universe@483:     if(a == 0 || b == 0) {
universe@483:         *result = 0;
universe@483:         return 0;
universe@483:     }
universe@483:     size_t r = a * b;
universe@483:     if(r / b == a) {
universe@483:         *result = r;
universe@483:         return 0;
universe@483:     } else {
universe@483:         *result = 0;
universe@483:         return 1;
universe@483:     }
universe@483: }
universe@483: #endif