Add standalone byte-swapping routines that don't require testing
the system's byte-order:
- host to {big,little}-endian {16,32}
- {big,little}-endian {16,32} to host
These are not intended to be used in libsa directly, but are rather
intended to be used by host tools which may use libsa routines (such
as loadfile()) which need to use explicit byte-ordering.
This commit is contained in:
thorpej
parent
732cb3a230
commit
74eebee33c
148
sys/lib/libsa/byteorder.c
Normal file
148
sys/lib/libsa/byteorder.c
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@ -0,0 +1,148 @@
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/* $NetBSD: byteorder.c,v 1.1 2001/10/30 23:35:33 thorpej Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE 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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#include "byteorder.h"
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typedef union {
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uint16_t val;
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uint8_t bytes[2];
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} un16;
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typedef union {
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uint32_t val;
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uint8_t bytes[4];
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} un32;
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/* 16-bit */
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uint16_t
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sa_htobe16(uint16_t val)
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{
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un16 un;
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un.bytes[1] = val & 0xff;
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un.bytes[0] = (val >> 8) & 0xff;
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return (un.val);
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}
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uint16_t
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sa_htole16(uint16_t val)
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{
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un16 un;
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un.bytes[0] = val & 0xff;
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un.bytes[1] = (val >> 8) & 0xff;
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return (un.val);
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}
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uint16_t
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sa_be16toh(uint16_t val)
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{
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un16 un;
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un.val = val;
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return ((un.bytes[0] << 8) |
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un.bytes[1]);
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}
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uint16_t
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sa_le16toh(uint16_t val)
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{
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un16 un;
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un.val = val;
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return ((un.bytes[1] << 8) |
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un.bytes[0]);
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}
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/* 32-bit */
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uint32_t
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sa_htobe32(uint32_t val)
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{
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un32 un;
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un.bytes[3] = val & 0xff;
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un.bytes[2] = (val >> 8) & 0xff;
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un.bytes[1] = (val >> 16) & 0xff;
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un.bytes[0] = (val >> 24) & 0xff;
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return (un.val);
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}
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uint32_t
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sa_htole32(uint32_t val)
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{
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un32 un;
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un.bytes[0] = val & 0xff;
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un.bytes[1] = (val >> 8) & 0xff;
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un.bytes[2] = (val >> 16) & 0xff;
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un.bytes[3] = (val >> 24) & 0xff;
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return (un.val);
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}
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uint32_t
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sa_be32toh(uint32_t val)
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{
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un32 un;
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un.val = val;
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return ((un.bytes[0] << 24) |
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(un.bytes[1] << 16) |
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(un.bytes[2] << 8) |
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un.bytes[3]);
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}
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uint32_t
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sa_le32toh(uint32_t val)
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{
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un32 un;
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un.val = val;
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return ((un.bytes[3] << 24) |
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(un.bytes[2] << 16) |
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(un.bytes[1] << 8) |
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un.bytes[0]);
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}
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57
sys/lib/libsa/byteorder.h
Normal file
57
sys/lib/libsa/byteorder.h
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@ -0,0 +1,57 @@
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/* $NetBSD: byteorder.h,v 1.1 2001/10/30 23:35:33 thorpej Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
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* or promote products derived from this software without specific prior
|
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* written permission.
|
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
|
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
|
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* BE 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
|
||||
* 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 _LIBSA_BYTEORDER_H_
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#define _LIBSA_BYTEORDER_H_
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#ifdef _STANDALONE
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#include <lib/libsa/stand.h>
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#else
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#include <inttypes.h>
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#endif
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uint16_t sa_htobe16(uint16_t);
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uint16_t sa_htole16(uint16_t);
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uint16_t sa_be16toh(uint16_t);
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uint16_t sa_le16toh(uint16_t);
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uint32_t sa_htobe32(uint32_t);
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uint32_t sa_htole32(uint32_t);
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uint32_t sa_be32toh(uint32_t);
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uint32_t sa_le32toh(uint32_t);
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#endif /* _LIBSA_BYTEORDER_H_ */
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