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https://origsvn.digium.com/svn/asterisk/branches/1.8 ........ r282543 | dvossel | 2010-08-17 14:34:06 -0500 (Tue, 17 Aug 2010) | 4 lines fixes truncated uint64_t value in put_unaligned_uint64_t() function (issue #17804) ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@282544 65c4cc65-6c06-0410-ace0-fbb531ad65f3
147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2009, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief Handle unaligned data access
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*/
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#ifndef _ASTERISK_UNALIGNED_H
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#define _ASTERISK_UNALIGNED_H
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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#ifdef __GNUC__
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/* If we just tell GCC what's going on, we can trust it to behave optimally */
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static inline uint64_t get_unaligned_uint64(const void *p)
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{
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const struct { uint64_t d; } __attribute__((packed)) *pp = p;
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return pp->d;
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}
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static inline unsigned int get_unaligned_uint32(const void *p)
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{
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const struct { unsigned int d; } __attribute__((packed)) *pp = p;
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return pp->d;
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}
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static inline unsigned short get_unaligned_uint16(const void *p)
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{
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const struct { unsigned short d; } __attribute__((packed)) *pp = p;
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return pp->d;
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}
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static inline void put_unaligned_uint64(void *p, uint64_t datum)
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{
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struct { uint64_t d; } __attribute__((packed,may_alias)) *pp = p;
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pp->d = datum;
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}
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static inline void put_unaligned_uint32(void *p, unsigned int datum)
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{
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struct { unsigned int d; } __attribute__((packed)) *pp = p;
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pp->d = datum;
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}
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static inline void put_unaligned_uint16(void *p, unsigned short datum)
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{
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struct { unsigned short d; } __attribute__((packed)) *pp = p;
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pp->d = datum;
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}
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#elif defined(SOLARIS) && defined(__sparc__)
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static inline uint64_t get_unaligned_uint64(const void *p)
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{
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const unsigned char *cp = p;
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return
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(((uint64_t) cp[0]) << 56) |
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(((uint64_t) cp[1]) << 48) |
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(((uint64_t) cp[2]) << 40) |
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(((uint64_t) cp[3]) << 32) |
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(((uint64_t) cp[4]) << 24) |
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(((uint64_t) cp[5]) << 16) |
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(((uint64_t) cp[6]) << 8) |
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(((uint64_t) cp[7]) << 0);
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}
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static inline unsigned int get_unaligned_uint32(const void *p)
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{
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const unsigned char *cp = p;
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return (cp[0] << 24) | (cp[1] << 16) | (cp[2] << 8) | cp[3];
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}
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static inline unsigned short get_unaligned_uint16(const void *p)
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{
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const unsigned char *cp = p;
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return (cp[0] << 8) | cp[1] ;
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}
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static inline void put_unaligned_uint64(void *p, uint64_t datum)
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{
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unsigned char *cp = p;
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cp[0] = (datum >> 56) & 0xff;
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cp[1] = (datum >> 48) & 0xff;
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cp[2] = (datum >> 40) & 0xff;
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cp[3] = (datum >> 32) & 0xff;
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cp[4] = (datum >> 24) & 0xff;
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cp[5] = (datum >> 16) & 0xff;
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cp[6] = (datum >> 8) & 0xff;
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cp[7] = (datum >> 0) & 0xff;
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}
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static inline void put_unaligned_uint32(void *p, unsigned int datum)
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{
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unsigned char *cp = p;
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cp[0] = datum >> 24;
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cp[1] = datum >> 16;
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cp[2] = datum >> 8;
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cp[3] = datum;
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}
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static inline void put_unaligned_uint16(void *p, unsigned int datum)
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{
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unsigned char *cp = p;
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cp[0] = datum >> 8;
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cp[1] = datum;
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}
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#else /* Not GCC, not Solaris/SPARC. Assume we can handle direct load/store. */
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#define get_unaligned_uint64(p) (*((uint64_t *)(p)))
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#define get_unaligned_uint32(p) (*((unsigned int *)(p)))
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#define get_unaligned_uint16(p) (*((unsigned short *)(p)))
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#define put_unaligned_uint64(p,d) do { uint64_t *__P = (p); *__P = d; } while(0)
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#define put_unaligned_uint32(p,d) do { unsigned int *__P = (p); *__P = d; } while(0)
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#define put_unaligned_uint16(p,d) do { unsigned short *__P = (p); *__P = d; } while(0)
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#endif
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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#endif /* _ASTERISK_UNALIGNED_H */
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