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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:07:43 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:07:43 +0200
commit4226e548662339ea1ca37b45385a7cf9b237ff1e (patch)
tree9a3fa54b85d97f05164e41bdb96b82f748a37342 /shared/ossp_uuid/uuid_bm.h
parent3.7 (diff)
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diff --git a/shared/ossp_uuid/uuid_bm.h b/shared/ossp_uuid/uuid_bm.h
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--- a/shared/ossp_uuid/uuid_bm.h
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-/*
-** OSSP uuid - Universally Unique Identifier
-** Copyright (c) 2004-2008 Ralf S. Engelschall <rse@engelschall.com>
-** Copyright (c) 2004-2008 The OSSP Project <http://www.ossp.org/>
-**
-** This file is part of OSSP uuid, a library for the generation
-** of UUIDs which can found at http://www.ossp.org/pkg/lib/uuid/
-**
-** Permission to use, copy, modify, and distribute this software for
-** any purpose with or without fee is hereby granted, provided that
-** the above copyright notice and this permission notice appear in all
-** copies.
-**
-** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
-** 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.
-**
-** uuid_bm.c: bitmask API implementation
-*/
-
-#ifndef __UUID_BM_H__
-#define __UUID_BM_H__
-
-/*
- * Bitmask Calculation Macros (up to 32 bit only)
- * (Notice: bit positions are counted n...0, i.e. lowest bit is position 0)
- */
-
-/* generate a bitmask consisting of 1 bits from (and including)
- bit position `l' (left) to (and including) bit position `r' */
-#define BM_MASK(l,r) \
- ((((unsigned int)1<<(((l)-(r))+1))-1)<<(r))
-
-/* extract a value v from a word w at position `l' to `r' and return value */
-#define BM_GET(w,l,r) \
- (((w)>>(r))&BM_MASK((l)-(r),0))
-
-/* insert a value v into a word w at position `l' to `r' and return word */
-#define BM_SET(w,l,r,v) \
- ((w)|(((v)&BM_MASK((l)-(r),0))<<(r)))
-
-/* generate a single bit `b' (0 or 1) at bit position `n' */
-#define BM_BIT(n,b) \
- ((b)<<(n))
-
-/* generate a quad word octet of bits (a half byte, i.e. bit positions 3 to 0) */
-#define BM_QUAD(b3,b2,b1,b0) \
- (BM_BIT(3,(b3))|BM_BIT(2,(b2))|BM_BIT(1,(b1))|BM_BIT(0,(b0)))
-
-/* generate an octet word of bits (a byte, i.e. bit positions 7 to 0) */
-#define BM_OCTET(b7,b6,b5,b4,b3,b2,b1,b0) \
- ((BM_QUAD(b7,b6,b5,b4)<<4)|BM_QUAD(b3,b2,b1,b0))
-
-/* generate the value 2^n */
-#define BM_POW2(n) \
- BM_BIT(n,1)
-
-/* shift word w k bits to the left or to the right */
-#define BM_SHL(w,k) \
- ((w)<<(k))
-#define BM_SHR(w,k) \
- ((w)>>(k))
-
-/* rotate word w (of bits n..0) k bits to the left or to the right */
-#define BM_ROL(w,n,k) \
- ((BM_SHL((w),(k))&BM_MASK(n,0))|BM_SHR(((w)&BM_MASK(n,0)),(n)-(k)))
-#define BM_ROR(w,n,k) \
- ((BM_SHR(((w)&BM_MASK(n,0)),(k)))|BM_SHL(((w),(n)-(k))&BM_MASK(n,0)))
-
-#endif /* __UUID_BM_H__ */
-
bgstack15