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Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_endian.h')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_endian.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_endian.h b/Utilities/cmlibarchive/libarchive/archive_endian.h new file mode 100644 index 0000000000..e6d3f2ce5e --- /dev/null +++ b/Utilities/cmlibarchive/libarchive/archive_endian.h @@ -0,0 +1,195 @@ +/*- + * Copyright (c) 2002 Thomas Moestl <tmm@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD: head/lib/libarchive/archive_endian.h 201085 2009-12-28 02:17:15Z kientzle $ + * + * Borrowed from FreeBSD's <sys/endian.h> + */ + +#ifndef ARCHIVE_ENDIAN_H_INCLUDED +#define ARCHIVE_ENDIAN_H_INCLUDED + +/* Note: This is a purely internal header! */ +/* Do not use this outside of libarchive internal code! */ + +#ifndef __LIBARCHIVE_BUILD +#error This header is only to be used internally to libarchive. +#endif + +/* + * Disabling inline keyword for compilers known to choke on it: + * - Watcom C++ in C code. (For any version?) + * - SGI MIPSpro + * - Microsoft Visual C++ 6.0 (supposedly newer versions too) + * - IBM VisualAge 6 (XL v6) + * - Sun WorkShop C (SunPro) before 5.9 + */ +#if defined(__WATCOMC__) || defined(__sgi) || defined(__hpux) || defined(__BORLANDC__) +#define inline +#elif defined(__IBMC__) && __IBMC__ < 700 +#define inline +#elif defined(__SUNPRO_C) && __SUNPRO_C < 0x590 +#define inline +#elif defined(_MSC_VER) || defined(__osf__) +#define inline __inline +#endif + +/* Alignment-agnostic encode/decode bytestream to/from little/big endian. */ + +static inline uint16_t +archive_be16dec(const void *pp) +{ + unsigned char const *p = (unsigned char const *)pp; + + /* Store into unsigned temporaries before left shifting, to avoid + promotion to signed int and then left shifting into the sign bit, + which is undefined behaviour. */ + unsigned int p1 = p[1]; + unsigned int p0 = p[0]; + + return ((p0 << 8) | p1); +} + +static inline uint32_t +archive_be32dec(const void *pp) +{ + unsigned char const *p = (unsigned char const *)pp; + + /* Store into unsigned temporaries before left shifting, to avoid + promotion to signed int and then left shifting into the sign bit, + which is undefined behaviour. */ + unsigned int p3 = p[3]; + unsigned int p2 = p[2]; + unsigned int p1 = p[1]; + unsigned int p0 = p[0]; + + return ((p0 << 24) | (p1 << 16) | (p2 << 8) | p3); +} + +static inline uint64_t +archive_be64dec(const void *pp) +{ + unsigned char const *p = (unsigned char const *)pp; + + return (((uint64_t)archive_be32dec(p) << 32) | archive_be32dec(p + 4)); +} + +static inline uint16_t +archive_le16dec(const void *pp) +{ + unsigned char const *p = (unsigned char const *)pp; + + /* Store into unsigned temporaries before left shifting, to avoid + promotion to signed int and then left shifting into the sign bit, + which is undefined behaviour. */ + unsigned int p1 = p[1]; + unsigned int p0 = p[0]; + + return ((p1 << 8) | p0); +} + +static inline uint32_t +archive_le32dec(const void *pp) +{ + unsigned char const *p = (unsigned char const *)pp; + + /* Store into unsigned temporaries before left shifting, to avoid + promotion to signed int and then left shifting into the sign bit, + which is undefined behaviour. */ + unsigned int p3 = p[3]; + unsigned int p2 = p[2]; + unsigned int p1 = p[1]; + unsigned int p0 = p[0]; + + return ((p3 << 24) | (p2 << 16) | (p1 << 8) | p0); +} + +static inline uint64_t +archive_le64dec(const void *pp) +{ + unsigned char const *p = (unsigned char const *)pp; + + return (((uint64_t)archive_le32dec(p + 4) << 32) | archive_le32dec(p)); +} + +static inline void +archive_be16enc(void *pp, uint16_t u) +{ + unsigned char *p = (unsigned char *)pp; + + p[0] = (u >> 8) & 0xff; + p[1] = u & 0xff; +} + +static inline void +archive_be32enc(void *pp, uint32_t u) +{ + unsigned char *p = (unsigned char *)pp; + + p[0] = (u >> 24) & 0xff; + p[1] = (u >> 16) & 0xff; + p[2] = (u >> 8) & 0xff; + p[3] = u & 0xff; +} + +static inline void +archive_be64enc(void *pp, uint64_t u) +{ + unsigned char *p = (unsigned char *)pp; + + archive_be32enc(p, (uint32_t)(u >> 32)); + archive_be32enc(p + 4, (uint32_t)(u & 0xffffffff)); +} + +static inline void +archive_le16enc(void *pp, uint16_t u) +{ + unsigned char *p = (unsigned char *)pp; + + p[0] = u & 0xff; + p[1] = (u >> 8) & 0xff; +} + +static inline void +archive_le32enc(void *pp, uint32_t u) +{ + unsigned char *p = (unsigned char *)pp; + + p[0] = u & 0xff; + p[1] = (u >> 8) & 0xff; + p[2] = (u >> 16) & 0xff; + p[3] = (u >> 24) & 0xff; +} + +static inline void +archive_le64enc(void *pp, uint64_t u) +{ + unsigned char *p = (unsigned char *)pp; + + archive_le32enc(p, (uint32_t)(u & 0xffffffff)); + archive_le32enc(p + 4, (uint32_t)(u >> 32)); +} + +#endif |