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140 lines
3.7 KiB
140 lines
3.7 KiB
/*- |
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* Copyright 2007-2009 Colin Percival |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* This file was originally written by Colin Percival as part of the Tarsnap |
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* online backup system. |
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*/ |
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#ifndef _SYSENDIAN_H_ |
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#define _SYSENDIAN_H_ |
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/* If we don't have be64enc, the <sys/endian.h> we have isn't usable. */ |
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#if !HAVE_DECL_BE64ENC |
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#undef HAVE_SYS_ENDIAN_H |
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#endif |
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#ifdef HAVE_SYS_ENDIAN_H |
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#include <sys/endian.h> |
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#else |
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#include <stdint.h> |
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#if !HAVE_DECL_LE32DEC |
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static uint32_t le32dec(const void *pp) |
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{ |
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const uint8_t *p = (uint8_t const *)pp; |
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return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) + |
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((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24)); |
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} |
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#endif |
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#if !HAVE_DECL_BE32ENC |
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static void be32enc(void *pp, uint32_t x) |
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{ |
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uint8_t *p = (uint8_t *)pp; |
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p[3] = x & 0xff; |
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p[2] = (x >> 8) & 0xff; |
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p[1] = (x >> 16) & 0xff; |
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p[0] = (x >> 24) & 0xff; |
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} |
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#endif |
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#if !HAVE_DECL_BE32DEC |
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static uint32_t be32dec(const void *pp) |
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{ |
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const uint8_t *p = (uint8_t const *)pp; |
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return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) + |
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((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24)); |
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} |
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#endif |
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#if !HAVE_DECL_LE32ENC |
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static void le32enc(void *pp, uint32_t x) |
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{ |
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uint8_t *p = (uint8_t *)pp; |
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p[0] = x & 0xff; |
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p[1] = (x >> 8) & 0xff; |
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p[2] = (x >> 16) & 0xff; |
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p[3] = (x >> 24) & 0xff; |
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} |
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#endif |
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static uint64_t |
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be64dec(const void *pp) |
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{ |
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const uint8_t *p = (uint8_t const *)pp; |
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return ((uint64_t)(p[7]) + ((uint64_t)(p[6]) << 8) + |
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((uint64_t)(p[5]) << 16) + ((uint64_t)(p[4]) << 24) + |
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((uint64_t)(p[3]) << 32) + ((uint64_t)(p[2]) << 40) + |
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((uint64_t)(p[1]) << 48) + ((uint64_t)(p[0]) << 56)); |
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} |
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static void |
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be64enc(void *pp, uint64_t x) |
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{ |
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uint8_t * p = (uint8_t *)pp; |
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p[7] = x & 0xff; |
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p[6] = (x >> 8) & 0xff; |
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p[5] = (x >> 16) & 0xff; |
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p[4] = (x >> 24) & 0xff; |
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p[3] = (x >> 32) & 0xff; |
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p[2] = (x >> 40) & 0xff; |
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p[1] = (x >> 48) & 0xff; |
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p[0] = (x >> 56) & 0xff; |
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} |
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static uint64_t |
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le64dec(const void *pp) |
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{ |
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const uint8_t *p = (uint8_t const *)pp; |
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return ((uint64_t)(p[0]) + ((uint64_t)(p[1]) << 8) + |
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((uint64_t)(p[2]) << 16) + ((uint64_t)(p[3]) << 24) + |
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((uint64_t)(p[4]) << 32) + ((uint64_t)(p[5]) << 40) + |
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((uint64_t)(p[6]) << 48) + ((uint64_t)(p[7]) << 56)); |
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} |
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static void |
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le64enc(void *pp, uint64_t x) |
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{ |
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uint8_t * p = (uint8_t *)pp; |
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p[0] = x & 0xff; |
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p[1] = (x >> 8) & 0xff; |
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p[2] = (x >> 16) & 0xff; |
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p[3] = (x >> 24) & 0xff; |
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p[4] = (x >> 32) & 0xff; |
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p[5] = (x >> 40) & 0xff; |
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p[6] = (x >> 48) & 0xff; |
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p[7] = (x >> 56) & 0xff; |
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} |
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#endif /* !HAVE_SYS_ENDIAN_H */ |
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#endif /* !_SYSENDIAN_H_ */
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