1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2012-2014 Xiph.org Foundation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /* It is assumed that this header will be included after "config.h". */
33
34 #if HAVE_BSWAP32 /* GCC and Clang */
35
36 /* GCC prior to 4.8 didn't provide bswap16 on x86_64 */
37 #if ! HAVE_BSWAP16
__builtin_bswap16(unsigned short a)38 static inline unsigned short __builtin_bswap16(unsigned short a)
39 {
40 return (a<<8)|(a>>8);
41 }
42 #endif
43
44 #define ENDSWAP_16(x) (__builtin_bswap16 (x))
45 #define ENDSWAP_32(x) (__builtin_bswap32 (x))
46
47 #elif defined _MSC_VER /* Windows. Apparently in <stdlib.h>. */
48
49 #define ENDSWAP_16(x) (_byteswap_ushort (x))
50 #define ENDSWAP_32(x) (_byteswap_ulong (x))
51
52 #elif defined HAVE_BYTESWAP_H /* Linux */
53
54 // JUCE: removed as JUCE already includes standard headers and including
55 // these in FlacNamespace will cause problems
56 //#include <byteswap.h>
57
58 #define ENDSWAP_16(x) (bswap_16 (x))
59 #define ENDSWAP_32(x) (bswap_32 (x))
60
61 #else
62
63 #define ENDSWAP_16(x) ((((x) >> 8) & 0xFF) | (((x) & 0xFF) << 8))
64 #define ENDSWAP_32(x) ((((x) >> 24) & 0xFF) | (((x) >> 8) & 0xFF00) | (((x) & 0xFF00) << 8) | (((x) & 0xFF) << 24))
65
66 #endif
67
68
69 /* Host to little-endian byte swapping. */
70 #if CPU_IS_BIG_ENDIAN
71
72 #define H2LE_16(x) ENDSWAP_16 (x)
73 #define H2LE_32(x) ENDSWAP_32 (x)
74
75 #else
76
77 #define H2LE_16(x) (x)
78 #define H2LE_32(x) (x)
79
80 #endif
81