Switchtec Userspace PROJECT_NUMBER = 3.1
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utils.h
1/*
2 * Microsemi Switchtec(tm) PCIe Management Library
3 * Copyright (c) 2017, Microsemi Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 */
24
25#ifndef LIBSWITCHTEC_MACROS_H
26#define LIBSWITCHTEC_MACROS_H
27
28#ifndef ARRAY_SIZE
29#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
30#endif
31
32#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
33
34struct range {
35 int start, end, step;
36};
37
38#define _RANGE_CNT(start, end, step) DIV_ROUND_UP((end) - (start) + 1, (step))
39#define RANGE_CNT(rng) _RANGE_CNT((rng)->start, (rng)->end, (rng)->step)
40#define RANGE_TO_IDX(rng, x) DIV_ROUND_UP((x) - (rng)->start, (rng)->step)
41
42#define for_range(i, rng) \
43 for((i) = (rng)->start; (i) <= (rng)->end; (i) += (rng)->step)
44
45#define for_rev_range(i, rng) \
46 for((i) = (rng)->start + (RANGE_CNT(rng) - 1) * (rng)->step; \
47 (i) >= (rng)->start; (i) -= (rng)->step)
48
49#endif
Definition: utils.h:34