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/*
* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*
* Portions Copyright (C) 2001 Nominum, Inc.
*
* Permission to use, copy, modify, and/or 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.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef ISCCC_UTIL_H
#define ISCCC_UTIL_H 1
#include <isc/util.h>
/*! \file isccc/util.h
* \brief
* Macros for dealing with unaligned numbers.
*
* \note no side effects are allowed when invoking these macros!
*/
#define GET8(v, w) \
do { \
v = *w; \
w++; \
} while (0)
#define GET16(v, w) \
do { \
v = (unsigned int)w[0] << 8; \
v |= (unsigned int)w[1]; \
w += 2; \
} while (0)
#define GET24(v, w) \
do { \
v = (unsigned int)w[0] << 16; \
v |= (unsigned int)w[1] << 8; \
v |= (unsigned int)w[2]; \
w += 3; \
} while (0)
#define GET32(v, w) \
do { \
v = (unsigned int)w[0] << 24; \
v |= (unsigned int)w[1] << 16; \
v |= (unsigned int)w[2] << 8; \
v |= (unsigned int)w[3]; \
w += 4; \
} while (0)
#define GET64(v, w) \
do { \
v = (isc_uint64_t)w[0] << 56; \
v |= (isc_uint64_t)w[1] << 48; \
v |= (isc_uint64_t)w[2] << 40; \
v |= (isc_uint64_t)w[3] << 32; \
v |= (isc_uint64_t)w[4] << 24; \
v |= (isc_uint64_t)w[5] << 16; \
v |= (isc_uint64_t)w[6] << 8; \
v |= (isc_uint64_t)w[7]; \
w += 8; \
} while (0)
#define GETC16(v, w, d) \
do { \
GET8(v, w); \
if (v == 0) \
d = ISCCC_TRUE; \
else { \
d = ISCCC_FALSE; \
if (v == 255) \
GET16(v, w); \
} \
} while (0)
#define GETC32(v, w) \
do { \
GET24(v, w); \
if (v == 0xffffffu) \
GET32(v, w); \
} while (0)
#define GET_OFFSET(v, w) GET32(v, w)
#define GET_MEM(v, c, w) \
do { \
memmove(v, w, c); \
w += c; \
} while (0)
#define GET_TYPE(v, w) \
do { \
GET8(v, w); \
if (v > 127) { \
if (v < 255) \
v = ((v & 0x7f) << 16) | ISCCC_RDATATYPE_SIG; \
else \
GET32(v, w); \
} \
} while (0)
#define PUT8(v, w) \
do { \
*w = (v & 0x000000ffU); \
w++; \
} while (0)
#define PUT16(v, w) \
do { \
w[0] = (v & 0x0000ff00U) >> 8; \
w[1] = (v & 0x000000ffU); \
w += 2; \
} while (0)
#define PUT24(v, w) \
do { \
w[0] = (v & 0x00ff0000U) >> 16; \
w[1] = (v & 0x0000ff00U) >> 8; \
w[2] = (v & 0x000000ffU); \
w += 3; \
} while (0)
#define PUT32(v, w) \
do { \
w[0] = (v & 0xff000000U) >> 24; \
w[1] = (v & 0x00ff0000U) >> 16; \
w[2] = (v & 0x0000ff00U) >> 8; \
w[3] = (v & 0x000000ffU); \
w += 4; \
} while (0)
#define PUT64(v, w) \
do { \
w[0] = (v & 0xff00000000000000ULL) >> 56; \
w[1] = (v & 0x00ff000000000000ULL) >> 48; \
w[2] = (v & 0x0000ff0000000000ULL) >> 40; \
w[3] = (v & 0x000000ff00000000ULL) >> 32; \
w[4] = (v & 0x00000000ff000000ULL) >> 24; \
w[5] = (v & 0x0000000000ff0000ULL) >> 16; \
w[6] = (v & 0x000000000000ff00ULL) >> 8; \
w[7] = (v & 0x00000000000000ffULL); \
w += 8; \
} while (0)
#define PUTC16(v, w) \
do { \
if (v > 0 && v < 255) \
PUT8(v, w); \
else { \
PUT8(255, w); \
PUT16(v, w); \
} \
} while (0)
#define PUTC32(v, w) \
do { \
if (v < 0xffffffU) \
PUT24(v, w); \
else { \
PUT24(0xffffffU, w); \
PUT32(v, w); \
} \
} while (0)
#define PUT_OFFSET(v, w) PUT32(v, w)
#include <string.h>
#define PUT_MEM(s, c, w) \
do { \
memmove(w, s, c); \
w += c; \
} while (0)
/*
* Regions.
*/
#define REGION_SIZE(r) ((unsigned int)((r).rend - (r).rstart))
#define REGION_EMPTY(r) ((r).rstart == (r).rend)
#define REGION_FROMSTRING(r, s) do { \
(r).rstart = (unsigned char *)s; \
(r).rend = (r).rstart + strlen(s); \
} while (0)
/*%
* Use this to remove the const qualifier of a variable to assign it to
* a non-const variable or pass it as a non-const function argument ...
* but only when you are sure it won't then be changed!
* This is necessary to sometimes shut up some compilers
* (as with gcc -Wcast-qual) when there is just no other good way to avoid the
* situation.
*/
#define DE_CONST(konst, var) \
do { \
union { const void *k; void *v; } _u; \
_u.k = konst; \
var = _u.v; \
} while (0)
#endif /* ISCCC_UTIL_H */
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