source/blender/blenfont/intern/blf_util.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright 2009 Blender Foundation. All rights reserved. */

/** \file
 * \ingroup blf
 *
 * Internal utility API for BLF.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "BLI_utildefines.h"

#include "blf_internal.h"

uint blf_next_p2(uint x)
{
  x -= 1;
  x |= (x >> 16);
  x |= (x >> 8);
  x |= (x >> 4);
  x |= (x >> 2);
  x |= (x >> 1);
  x += 1;
  return x;
}

uint blf_hash(uint val)
{
  uint key;

  key = val;
  key += ~(key << 16);
  key ^= (key >> 5);
  key += (key << 3);
  key ^= (key >> 13);
  key += ~(key << 9);
  key ^= (key >> 17);
  return key % 257;
}