1/*****************************************************************************/
2/* */
3/* alignment.h */
4/* */
5/* Address aligment */
6/* */
7/* */
8/* */
9/* (C) 2011, Ullrich von Bassewitz */
10/* Roemerstrasse 52 */
11/* 70794 Filderstadt */
12/* EMail: uz@cc65.org */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36#ifndef ALIGNMENT_H
37#define ALIGNMENT_H
38
39
40
41/* common */
42#include "inline.h"
43
44
45
46/*****************************************************************************/
47/* Data */
48/*****************************************************************************/
49
50
51
52/* Maximum possible alignment. Beware: To increase the possible alignment it
53** is not enough to bump this value. Check the code inside.
54*/
55#define MAX_ALIGNMENT 0x10000UL
56
57/* The following value marks what is considered a "large alignment" and worth
58** a warning if not suppressed.
59*/
60#define LARGE_ALIGNMENT 0x101UL
61
62
63
64/*****************************************************************************/
65/* Code */
66/*****************************************************************************/
67
68
69
70unsigned long LeastCommonMultiple (unsigned long Left, unsigned long Right);
71/* Calculate the least common multiple of two numbers and return
72** the result.
73*/
74
75unsigned long AlignAddr (unsigned long Addr, unsigned long Alignment);
76/* Align an address to the given alignment */
77
78unsigned long AlignCount (unsigned long Addr, unsigned long Alignment);
79/* Calculate how many bytes must be inserted to align Addr to Alignment */
80
81
82
83/* End of alignment.h */
84
85#endif
86