1caf54c4fSMartin Matuska /*-
2caf54c4fSMartin Matuska * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org>
3caf54c4fSMartin Matuska * All rights reserved.
4caf54c4fSMartin Matuska *
5caf54c4fSMartin Matuska * Redistribution and use in source and binary forms, with or without
6caf54c4fSMartin Matuska * modification, are permitted provided that the following conditions
7caf54c4fSMartin Matuska * are met:
8caf54c4fSMartin Matuska * 1. Redistributions of source code must retain the above copyright
9caf54c4fSMartin Matuska * notice, this list of conditions and the following disclaimer.
10caf54c4fSMartin Matuska * 2. Redistributions in binary form must reproduce the above copyright
11caf54c4fSMartin Matuska * notice, this list of conditions and the following disclaimer in the
12caf54c4fSMartin Matuska * documentation and/or other materials provided with the distribution.
13caf54c4fSMartin Matuska *
14caf54c4fSMartin Matuska * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15caf54c4fSMartin Matuska * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16caf54c4fSMartin Matuska * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17caf54c4fSMartin Matuska * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18caf54c4fSMartin Matuska * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19caf54c4fSMartin Matuska * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20caf54c4fSMartin Matuska * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21caf54c4fSMartin Matuska * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22caf54c4fSMartin Matuska * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23caf54c4fSMartin Matuska * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24caf54c4fSMartin Matuska * SUCH DAMAGE.
25caf54c4fSMartin Matuska *
26caf54c4fSMartin Matuska * Borrowed from FreeBSD's <sys/endian.h>
27caf54c4fSMartin Matuska */
28caf54c4fSMartin Matuska
29f9762417SMartin Matuska #ifndef ARCHIVE_ENDIAN_H_INCLUDED
30f9762417SMartin Matuska #define ARCHIVE_ENDIAN_H_INCLUDED
31caf54c4fSMartin Matuska
32caf54c4fSMartin Matuska /* Note: This is a purely internal header! */
33caf54c4fSMartin Matuska /* Do not use this outside of libarchive internal code! */
34caf54c4fSMartin Matuska
35f9762417SMartin Matuska #ifndef __LIBARCHIVE_BUILD
36f9762417SMartin Matuska #error This header is only to be used internally to libarchive.
37f9762417SMartin Matuska #endif
38caf54c4fSMartin Matuska
39caf54c4fSMartin Matuska /*
40caf54c4fSMartin Matuska * Disabling inline keyword for compilers known to choke on it:
41caf54c4fSMartin Matuska * - Watcom C++ in C code. (For any version?)
42caf54c4fSMartin Matuska * - SGI MIPSpro
43caf54c4fSMartin Matuska * - Microsoft Visual C++ 6.0 (supposedly newer versions too)
44cdf63a70SMartin Matuska * - IBM VisualAge 6 (XL v6)
45cdf63a70SMartin Matuska * - Sun WorkShop C (SunPro) before 5.9
46caf54c4fSMartin Matuska */
47caf54c4fSMartin Matuska #if defined(__WATCOMC__) || defined(__sgi) || defined(__hpux) || defined(__BORLANDC__)
48caf54c4fSMartin Matuska #define inline
49cdf63a70SMartin Matuska #elif defined(__IBMC__) && __IBMC__ < 700
50cdf63a70SMartin Matuska #define inline
51cdf63a70SMartin Matuska #elif defined(__SUNPRO_C) && __SUNPRO_C < 0x590
52cdf63a70SMartin Matuska #define inline
53cdf63a70SMartin Matuska #elif defined(_MSC_VER) || defined(__osf__)
54caf54c4fSMartin Matuska #define inline __inline
55caf54c4fSMartin Matuska #endif
56caf54c4fSMartin Matuska
57caf54c4fSMartin Matuska /* Alignment-agnostic encode/decode bytestream to/from little/big endian. */
58caf54c4fSMartin Matuska
59caf54c4fSMartin Matuska static inline uint16_t
archive_be16dec(const void * pp)60caf54c4fSMartin Matuska archive_be16dec(const void *pp)
61caf54c4fSMartin Matuska {
62caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp;
63caf54c4fSMartin Matuska
64cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid
65cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit,
66cdf63a70SMartin Matuska which is undefined behaviour. */
67cdf63a70SMartin Matuska unsigned int p1 = p[1];
68cdf63a70SMartin Matuska unsigned int p0 = p[0];
69cdf63a70SMartin Matuska
70cdf63a70SMartin Matuska return ((p0 << 8) | p1);
71caf54c4fSMartin Matuska }
72caf54c4fSMartin Matuska
73caf54c4fSMartin Matuska static inline uint32_t
archive_be32dec(const void * pp)74caf54c4fSMartin Matuska archive_be32dec(const void *pp)
75caf54c4fSMartin Matuska {
76caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp;
77caf54c4fSMartin Matuska
78cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid
79cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit,
80cdf63a70SMartin Matuska which is undefined behaviour. */
81cdf63a70SMartin Matuska unsigned int p3 = p[3];
82cdf63a70SMartin Matuska unsigned int p2 = p[2];
83cdf63a70SMartin Matuska unsigned int p1 = p[1];
84cdf63a70SMartin Matuska unsigned int p0 = p[0];
85cdf63a70SMartin Matuska
86cdf63a70SMartin Matuska return ((p0 << 24) | (p1 << 16) | (p2 << 8) | p3);
87caf54c4fSMartin Matuska }
88caf54c4fSMartin Matuska
89caf54c4fSMartin Matuska static inline uint64_t
archive_be64dec(const void * pp)90caf54c4fSMartin Matuska archive_be64dec(const void *pp)
91caf54c4fSMartin Matuska {
92caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp;
93caf54c4fSMartin Matuska
94caf54c4fSMartin Matuska return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4));
95caf54c4fSMartin Matuska }
96caf54c4fSMartin Matuska
97caf54c4fSMartin Matuska static inline uint16_t
archive_le16dec(const void * pp)98caf54c4fSMartin Matuska archive_le16dec(const void *pp)
99caf54c4fSMartin Matuska {
100caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp;
101caf54c4fSMartin Matuska
102cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid
103cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit,
104cdf63a70SMartin Matuska which is undefined behaviour. */
105cdf63a70SMartin Matuska unsigned int p1 = p[1];
106cdf63a70SMartin Matuska unsigned int p0 = p[0];
107cdf63a70SMartin Matuska
108cdf63a70SMartin Matuska return ((p1 << 8) | p0);
109caf54c4fSMartin Matuska }
110caf54c4fSMartin Matuska
111caf54c4fSMartin Matuska static inline uint32_t
archive_le32dec(const void * pp)112caf54c4fSMartin Matuska archive_le32dec(const void *pp)
113caf54c4fSMartin Matuska {
114caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp;
115caf54c4fSMartin Matuska
116cdf63a70SMartin Matuska /* Store into unsigned temporaries before left shifting, to avoid
117cdf63a70SMartin Matuska promotion to signed int and then left shifting into the sign bit,
118cdf63a70SMartin Matuska which is undefined behaviour. */
119cdf63a70SMartin Matuska unsigned int p3 = p[3];
120cdf63a70SMartin Matuska unsigned int p2 = p[2];
121cdf63a70SMartin Matuska unsigned int p1 = p[1];
122cdf63a70SMartin Matuska unsigned int p0 = p[0];
123cdf63a70SMartin Matuska
124cdf63a70SMartin Matuska return ((p3 << 24) | (p2 << 16) | (p1 << 8) | p0);
125caf54c4fSMartin Matuska }
126caf54c4fSMartin Matuska
127caf54c4fSMartin Matuska static inline uint64_t
archive_le64dec(const void * pp)128caf54c4fSMartin Matuska archive_le64dec(const void *pp)
129caf54c4fSMartin Matuska {
130caf54c4fSMartin Matuska unsigned char const *p = (unsigned char const *)pp;
131caf54c4fSMartin Matuska
132caf54c4fSMartin Matuska return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p));
133caf54c4fSMartin Matuska }
134caf54c4fSMartin Matuska
135caf54c4fSMartin Matuska static inline void
archive_be16enc(void * pp,uint16_t u)136caf54c4fSMartin Matuska archive_be16enc(void *pp, uint16_t u)
137caf54c4fSMartin Matuska {
138caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp;
139caf54c4fSMartin Matuska
140caf54c4fSMartin Matuska p[0] = (u >> 8) & 0xff;
141caf54c4fSMartin Matuska p[1] = u & 0xff;
142caf54c4fSMartin Matuska }
143caf54c4fSMartin Matuska
144caf54c4fSMartin Matuska static inline void
archive_be32enc(void * pp,uint32_t u)145caf54c4fSMartin Matuska archive_be32enc(void *pp, uint32_t u)
146caf54c4fSMartin Matuska {
147caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp;
148caf54c4fSMartin Matuska
149caf54c4fSMartin Matuska p[0] = (u >> 24) & 0xff;
150caf54c4fSMartin Matuska p[1] = (u >> 16) & 0xff;
151caf54c4fSMartin Matuska p[2] = (u >> 8) & 0xff;
152caf54c4fSMartin Matuska p[3] = u & 0xff;
153caf54c4fSMartin Matuska }
154caf54c4fSMartin Matuska
155caf54c4fSMartin Matuska static inline void
archive_be64enc(void * pp,uint64_t u)156caf54c4fSMartin Matuska archive_be64enc(void *pp, uint64_t u)
157caf54c4fSMartin Matuska {
158caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp;
159caf54c4fSMartin Matuska
160fd082e96SMartin Matuska archive_be32enc(p, (uint32_t)(u >> 32));
161fd082e96SMartin Matuska archive_be32enc(p + 4, (uint32_t)(u & 0xffffffff));
162caf54c4fSMartin Matuska }
163caf54c4fSMartin Matuska
164caf54c4fSMartin Matuska static inline void
archive_le16enc(void * pp,uint16_t u)165caf54c4fSMartin Matuska archive_le16enc(void *pp, uint16_t u)
166caf54c4fSMartin Matuska {
167caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp;
168caf54c4fSMartin Matuska
169caf54c4fSMartin Matuska p[0] = u & 0xff;
170caf54c4fSMartin Matuska p[1] = (u >> 8) & 0xff;
171caf54c4fSMartin Matuska }
172caf54c4fSMartin Matuska
173caf54c4fSMartin Matuska static inline void
archive_le32enc(void * pp,uint32_t u)174caf54c4fSMartin Matuska archive_le32enc(void *pp, uint32_t u)
175caf54c4fSMartin Matuska {
176caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp;
177caf54c4fSMartin Matuska
178caf54c4fSMartin Matuska p[0] = u & 0xff;
179caf54c4fSMartin Matuska p[1] = (u >> 8) & 0xff;
180caf54c4fSMartin Matuska p[2] = (u >> 16) & 0xff;
181caf54c4fSMartin Matuska p[3] = (u >> 24) & 0xff;
182caf54c4fSMartin Matuska }
183caf54c4fSMartin Matuska
184caf54c4fSMartin Matuska static inline void
archive_le64enc(void * pp,uint64_t u)185caf54c4fSMartin Matuska archive_le64enc(void *pp, uint64_t u)
186caf54c4fSMartin Matuska {
187caf54c4fSMartin Matuska unsigned char *p = (unsigned char *)pp;
188caf54c4fSMartin Matuska
189fd082e96SMartin Matuska archive_le32enc(p, (uint32_t)(u & 0xffffffff));
190fd082e96SMartin Matuska archive_le32enc(p + 4, (uint32_t)(u >> 32));
191caf54c4fSMartin Matuska }
192caf54c4fSMartin Matuska
193caf54c4fSMartin Matuska #endif
194