79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/* See endianconv.c top comments for more information
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*
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* ----------------------------------------------------------------------------
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*
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* Copyright (c) 2011-2012, Salvatore Sanfilippo <antirez at gmail dot com>
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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 are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * 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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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ENDIANCONV_H
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#define __ENDIANCONV_H
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#include "config.h"
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#include <stdint.h>
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void memrev16(void *p);
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void memrev32(void *p);
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void memrev64(void *p);
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uint16_t intrev16(uint16_t v);
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uint32_t intrev32(uint32_t v);
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uint64_t intrev64(uint64_t v);
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/* variants of the function doing the actual conversion only if the target
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* host is big endian */
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#if (BYTE_ORDER == LITTLE_ENDIAN)
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#define memrev16ifbe(p)
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#define memrev32ifbe(p)
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#define memrev64ifbe(p)
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#define intrev16ifbe(v) (v)
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#define intrev32ifbe(v) (v)
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#define intrev64ifbe(v) (v)
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#else
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#define memrev16ifbe(p) memrev16(p)
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#define memrev32ifbe(p) memrev32(p)
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#define memrev64ifbe(p) memrev64(p)
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#define intrev16ifbe(v) intrev16(v)
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#define intrev32ifbe(v) intrev32(v)
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#define intrev64ifbe(v) intrev64(v)
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#endif
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/* The functions htonu64() and ntohu64() convert the specified value to
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* network byte ordering and back. In big endian systems they are no-ops. */
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#if (BYTE_ORDER == BIG_ENDIAN)
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#define htonu64(v) (v)
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#define ntohu64(v) (v)
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#else
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#define htonu64(v) intrev64(v)
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#define ntohu64(v) intrev64(v)
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#endif
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#ifdef REDIS_TEST
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int endianconvTest(int argc, char *argv[]);
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#endif
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#endif
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