src/szmul.c

Sun, 22 Dec 2024 23:10:07 +0100

author
Mike Becker <universe@uap-core.de>
date
Sun, 22 Dec 2024 23:10:07 +0100
changeset 1050
3df63e95921a
parent 971
cc204fc56c9c
permissions
-rw-r--r--

make cx_strcast() also support cxstring

also makes the solution for issue #536 a lot nicer

674
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
1 /*
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
3 *
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
4 * Copyright 2023 Mike Becker, Olaf Wintermann All rights reserved.
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
5 *
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
6 * Redistribution and use in source and binary forms, with or without
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
7 * modification, are permitted provided that the following conditions are met:
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
8 *
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
9 * 1. Redistributions of source code must retain the above copyright
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
10 * notice, this list of conditions and the following disclaimer.
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
11 *
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
12 * 2. Redistributions in binary form must reproduce the above copyright
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
13 * notice, this list of conditions and the following disclaimer in the
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
14 * documentation and/or other materials provided with the distribution.
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
15 *
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
26 * POSSIBILITY OF SUCH DAMAGE.
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
27 */
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
28
971
cc204fc56c9c rename utils.h to streams.h
Mike Becker <universe@uap-core.de>
parents: 841
diff changeset
29 #include "cx/common.h"
cc204fc56c9c rename utils.h to streams.h
Mike Becker <universe@uap-core.de>
parents: 841
diff changeset
30
cc204fc56c9c rename utils.h to streams.h
Mike Becker <universe@uap-core.de>
parents: 841
diff changeset
31 #ifndef CX_SZMUL_BUILTIN
674
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
32 int cx_szmul_impl(
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
33 size_t a,
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
34 size_t b,
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
35 size_t *result
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
36 ) {
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
37 if (a == 0 || b == 0) {
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
38 *result = 0;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
39 return 0;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
40 }
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
41 size_t r = a * b;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
42 if (r / b == a) {
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
43 *result = r;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
44 return 0;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
45 } else {
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
46 *result = 0;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
47 return 1;
dc514a5d42a5 add stream copy utils - fixes #254
Mike Becker <universe@uap-core.de>
parents:
diff changeset
48 }
841
93851c0babe4 fix build in case CX_SZMUL_BUILTIN is undefined
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 674
diff changeset
49 }
971
cc204fc56c9c rename utils.h to streams.h
Mike Becker <universe@uap-core.de>
parents: 841
diff changeset
50 #endif // CX_SZMUL_BUILTIN

mercurial