/src/nettle/bswap-internal.h

Source (jump to first uncovered line)
/* bswap-internal.h

   Copyright (C) 2022 Niels Möller

   This file is part of GNU Nettle.

   GNU Nettle is free software: you can redistribute it and/or
   modify it under the terms of either:

     * the GNU Lesser General Public License as published by the Free
       Software Foundation; either version 3 of the License, or (at your
       option) any later version.

   or

     * the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at your
       option) any later version.

   or both in parallel, as here.

   GNU Nettle is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received copies of the GNU General Public License and
   the GNU Lesser General Public License along with this program.  If
   not, see http://www.gnu.org/licenses/.
*/

#ifndef NETTLE_BSWAP_INTERNAL_H_INCLUDED
#define NETTLE_BSWAP_INTERNAL_H_INCLUDED

#include "nettle-types.h"

/* Note that these definitions depend config.h, which should be
   included first. */

#if HAVE_BUILTIN_BSWAP64
#define nettle_bswap64 __builtin_bswap64
/* Assume bswap32 is also available. */
#define nettle_bswap32 __builtin_bswap32
#else
static inline uint64_t
nettle_bswap64 (uint64_t x)
{
  x = (x >> 32) | (x << 32);
  x = ((x >> 16) & UINT64_C (0xffff0000ffff))
    | ((x & UINT64_C (0xffff0000ffff)) << 16);
  x = ((x >> 8) & UINT64_C (0xff00ff00ff00ff))
    | ((x & UINT64_C (0xff00ff00ff00ff)) << 8);
  return x;
}

static inline uint32_t
nettle_bswap32 (uint32_t x)
{
  x = (x << 16) | (x >> 16);
  x = ((x & 0x00FF00FF) << 8) | ((x >> 8) & 0x00FF00FF);
  return x;
}
#endif

static inline void
nettle_bswap32_n (unsigned n, uint32_t *x)
{
  unsigned i;
  for (i = 0; i < n; i++)
    x[i] = nettle_bswap32 (x[i]);
}

#if WORDS_BIGENDIAN
#define bswap64_if_be nettle_bswap64
#define bswap32_if_be nettle_bswap32
#define bswap64_if_le(x) (x)
#define bswap32_if_le(x) (x)
#define bswap32_n_if_le(n, x)
#else
#define bswap64_if_be(x) (x)
#define bswap32_if_be(x) (x)
#define bswap64_if_le nettle_bswap64
#define bswap32_if_le nettle_bswap32
#define bswap32_n_if_le nettle_bswap32_n
#endif

#endif /* NETTLE_BSWAP_INTERNAL_H_INCLUDED */

Line	Count	Source (jump to first uncovered line)
1		/* bswap-internal.h
2
3		Copyright (C) 2022 Niels Möller
4
5		This file is part of GNU Nettle.
6
7		GNU Nettle is free software: you can redistribute it and/or
8		modify it under the terms of either:
9
10		* the GNU Lesser General Public License as published by the Free
11		Software Foundation; either version 3 of the License, or (at your
12		option) any later version.
13
14		or
15
16		* the GNU General Public License as published by the Free
17		Software Foundation; either version 2 of the License, or (at your
18		option) any later version.
19
20		or both in parallel, as here.
21
22		GNU Nettle is distributed in the hope that it will be useful,
23		but WITHOUT ANY WARRANTY; without even the implied warranty of
24		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
25		General Public License for more details.
26
27		You should have received copies of the GNU General Public License and
28		the GNU Lesser General Public License along with this program. If
29		not, see http://www.gnu.org/licenses/.
30		*/
31
32		#ifndef NETTLE_BSWAP_INTERNAL_H_INCLUDED
33		#define NETTLE_BSWAP_INTERNAL_H_INCLUDED
34
35		#include "nettle-types.h"
36
37		/* Note that these definitions depend config.h, which should be
38		included first. */
39
40		#if HAVE_BUILTIN_BSWAP64
41	0	#define nettle_bswap64 __builtin_bswap64
42		/* Assume bswap32 is also available. */
43	0	#define nettle_bswap32 __builtin_bswap32
44		#else
45		static inline uint64_t
46		nettle_bswap64 (uint64_t x)
47		{
48		x = (x >> 32) \| (x << 32);
49		x = ((x >> 16) & UINT64_C (0xffff0000ffff))
50		\| ((x & UINT64_C (0xffff0000ffff)) << 16);
51		x = ((x >> 8) & UINT64_C (0xff00ff00ff00ff))
52		\| ((x & UINT64_C (0xff00ff00ff00ff)) << 8);
53		return x;
54		}
55
56		static inline uint32_t
57		nettle_bswap32 (uint32_t x)
58		{
59		x = (x << 16) \| (x >> 16);
60		x = ((x & 0x00FF00FF) << 8) \| ((x >> 8) & 0x00FF00FF);
61		return x;
62		}
63		#endif
64
65		static inline void
66		nettle_bswap32_n (unsigned n, uint32_t *x)
67	0	{
68	0	unsigned i;
69	0	for (i = 0; i < n; i++)
70	0	x[i] = nettle_bswap32 (x[i]);
71	0	} Unexecuted instantiation: chacha-core-internal.c:nettle_bswap32_n Unexecuted instantiation: gcm.c:nettle_bswap32_n Unexecuted instantiation: cmac.c:nettle_bswap32_n Unexecuted instantiation: cmac64.c:nettle_bswap32_n Unexecuted instantiation: siv-cmac.c:nettle_bswap32_n Unexecuted instantiation: siv-gcm.c:nettle_bswap32_n Unexecuted instantiation: ghash-set-key.c:nettle_bswap32_n Unexecuted instantiation: ghash-update.c:nettle_bswap32_n Unexecuted instantiation: siv-ghash-set-key.c:nettle_bswap32_n Unexecuted instantiation: siv-ghash-update.c:nettle_bswap32_n Unexecuted instantiation: umac-l2.c:nettle_bswap32_n Unexecuted instantiation: umac-l3.c:nettle_bswap32_n Unexecuted instantiation: umac-set-key.c:nettle_bswap32_n Unexecuted instantiation: xts.c:nettle_bswap32_n Unexecuted instantiation: salsa20-core-internal.c:nettle_bswap32_n
72
73		#if WORDS_BIGENDIAN
74		#define bswap64_if_be nettle_bswap64
75		#define bswap32_if_be nettle_bswap32
76		#define bswap64_if_le(x) (x)
77		#define bswap32_if_le(x) (x)
78		#define bswap32_n_if_le(n, x)
79		#else
80	0	#define bswap64_if_be(x) (x)
81	0	#define bswap32_if_be(x) (x)
82	0	#define bswap64_if_le nettle_bswap64
83	0	#define bswap32_if_le nettle_bswap32
84	0	#define bswap32_n_if_le nettle_bswap32_n
85		#endif
86
87		#endif /* NETTLE_BSWAP_INTERNAL_H_INCLUDED */

Coverage Report

Created: 2025-03-18 06:55