1 /*
2 Copyright (C) 2017-2021, Dirk Krause
3 SPDX-License-Identifier: BSD-3-Clause
4 */
5
6 /*
7 WARNING: This file was generated by the dkct program (see
8 http://dktools.sourceforge.net/ for details).
9 Changes you make here will be lost if dkct is run again!
10 You should modify the original source and run dkct on it.
11 Original source: dk4pxbit.ctr
12 */
13
14 /** @file dk4pxbit.c The dk4pxbit module.
15 */
16
17
18 #include "dk4conf.h"
19 #ifndef DK4PXBIT_H_INCLUDED
20 #include <libdk4bif/dk4pxbit.h>
21 #endif
22
23
24
25
26
27
28
29 /** Bit number values.
30 */
31 static dk4_px_t dk4pxbit_values[] = {
32 0x0001U, 0x0002U, 0x0004U, 0x0008U, 0x0010U, 0x0020U, 0x0040U, 0x0080U,
33 0x0100U, 0x0200U, 0x0400U, 0x0800U, 0x1000U, 0x2000U, 0x4000U, 0x8000U
34 };
35
36
37 /** Maxima values.
38 */
39 static dk4_px_t dk4pxbit_maxima[] = {
40 0x0001U, 0x0003U, 0x0007U, 0x000FU, 0x001FU, 0x003FU, 0x007FU, 0x00FFU,
41 0x01FFU, 0x03FFU, 0x07FFU, 0x0FFFU, 0x1FFFU, 0x3FFFU, 0x7FFFU, 0xFFFFU
42 };
43
44
45
46 dk4_px_t
dk4pxbit_get_bit(size_t bitno)47 dk4pxbit_get_bit(size_t bitno)
48 {
49 if ((sizeof(dk4pxbit_values)/sizeof(dk4_px_t)) > bitno) {
50 return (dk4pxbit_values[bitno]);
51 }
52 return ((dk4_px_t)0U);
53 }
54
55
56
57 dk4_px_t
dk4pxbit_get_max(size_t bitno)58 dk4pxbit_get_max(size_t bitno)
59 {
60 dk4_px_t back = 0;
61
62 if (((sizeof(dk4pxbit_maxima)/sizeof(dk4_px_t)) > bitno) && (0 < bitno)) {
63 back = dk4pxbit_maxima[bitno - 1];
64 }
65
66 return back;
67 }
68
69
70
71 size_t
dk4pxbit_get_bitno(dk4_px_t maxval)72 dk4pxbit_get_bitno(dk4_px_t maxval)
73 {
74 size_t back = 16;
75 size_t i = 15;
76 int cc = 1;
77 for (i = 15; ((i > 0) && (1 == cc)); i--) {
78 if (dk4pxbit_maxima[i - 1] >= maxval) {
79 back = i;
80 }
81 else {
82 cc = 0;
83 }
84 }
85 return back;
86 }
87
88
89
90
91 /* vim: set ai sw=4 ts=4 : */
92
93