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* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")

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* This Source Code Form is subject to the terms of the Mozilla Public

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* License, v. 2.0. If a copy of the MPL was not distributed with this

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* file, you can obtain one at https://mozilla.org/MPL/2.0/.

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* See the COPYRIGHT file distributed with this work for additional

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* information regarding copyright ownership.

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* Permission to use, copy, modify, and/or distribute this software for any

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* purpose with or without fee is hereby granted, provided that the above

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* copyright notice and this permission notice appear in all copies.

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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL

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* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES

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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY

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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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#ifndef ISCCC_UTIL_H

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#define ISCCC_UTIL_H 1

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#include <inttypes.h>

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#include <isc/util.h>

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/*! \file isccc/util.h

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* \brief

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* Macros for dealing with unaligned numbers.

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* \note no side effects are allowed when invoking these macros!

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#define GET8(v, w) \

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do { \

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v = *w; \

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w++; \

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} while (0)

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#define GET16(v, w) \

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do { \

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v = (unsigned int)w[0] << 8; \

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v |= (unsigned int)w[1]; \

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w += 2; \

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} while (0)

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#define GET24(v, w) \

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do { \

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v = (unsigned int)w[0] << 16; \

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v |= (unsigned int)w[1] << 8; \

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v |= (unsigned int)w[2]; \

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w += 3; \

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} while (0)

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#define GET32(v, w) \

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do { \

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v = (unsigned int)w[0] << 24; \

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v |= (unsigned int)w[1] << 16; \

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v |= (unsigned int)w[2] << 8; \

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v |= (unsigned int)w[3]; \

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w += 4; \

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} while (0)

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#define GET64(v, w) \

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do { \

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v = (uint64_t)w[0] << 56; \

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v |= (uint64_t)w[1] << 48; \

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v |= (uint64_t)w[2] << 40; \

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v |= (uint64_t)w[3] << 32; \

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v |= (uint64_t)w[4] << 24; \

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v |= (uint64_t)w[5] << 16; \

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v |= (uint64_t)w[6] << 8; \

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v |= (uint64_t)w[7]; \

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w += 8; \

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} while (0)

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#define GETC16(v, w, d) \

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do { \

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GET8(v, w); \

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if (v == 0) \

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d = ISCCC_TRUE; \

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else { \

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d = ISCCC_FALSE; \

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if (v == 255) \

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GET16(v, w); \

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} \

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} while (0)

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#define GETC32(v, w) \

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do { \

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GET24(v, w); \

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if (v == 0xffffffu) \

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GET32(v, w); \

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} while (0)

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#define GET_OFFSET(v, w) GET32(v, w)

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#define GET_MEM(v, c, w) \

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do { \

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memmove(v, w, c); \

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w += c; \

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} while (0)

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#define GET_TYPE(v, w) \

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do { \

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GET8(v, w); \

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if (v > 127) { \

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if (v < 255) \

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v = ((v & 0x7f) << 16) | ISCCC_RDATATYPE_SIG; \

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else \

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GET32(v, w); \

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} \

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} while (0)

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#define PUT8(v, w) \

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do { \

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*w = (v & 0x000000ffU); \

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w++; \

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} while (0)

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#define PUT16(v, w) \

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do { \

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w[0] = (v & 0x0000ff00U) >> 8; \

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w[1] = (v & 0x000000ffU); \

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w += 2; \

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} while (0)

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#define PUT24(v, w) \

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do { \

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w[0] = (v & 0x00ff0000U) >> 16; \

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w[1] = (v & 0x0000ff00U) >> 8; \

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w[2] = (v & 0x000000ffU); \

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w += 3; \

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} while (0)

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#define PUT32(v, w) \

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do { \

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w[0] = (v & 0xff000000U) >> 24; \

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w[1] = (v & 0x00ff0000U) >> 16; \

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w[2] = (v & 0x0000ff00U) >> 8; \

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w[3] = (v & 0x000000ffU); \

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w += 4; \

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} while (0)

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#define PUT64(v, w) \

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do { \

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w[0] = (v & 0xff00000000000000ULL) >> 56; \

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w[1] = (v & 0x00ff000000000000ULL) >> 48; \

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w[2] = (v & 0x0000ff0000000000ULL) >> 40; \

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w[3] = (v & 0x000000ff00000000ULL) >> 32; \

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w[4] = (v & 0x00000000ff000000ULL) >> 24; \

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w[5] = (v & 0x0000000000ff0000ULL) >> 16; \

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w[6] = (v & 0x000000000000ff00ULL) >> 8; \

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w[7] = (v & 0x00000000000000ffULL); \

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w += 8; \

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} while (0)

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#define PUTC16(v, w) \

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do { \

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if (v > 0 && v < 255) \

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PUT8(v, w); \

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else { \

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PUT8(255, w); \

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PUT16(v, w); \

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} \

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} while (0)

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#define PUTC32(v, w) \

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do { \

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if (v < 0xffffffU) \

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PUT24(v, w); \

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else { \

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PUT24(0xffffffU, w); \

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PUT32(v, w); \

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} \

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} while (0)

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#define PUT_OFFSET(v, w) PUT32(v, w)

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#include <string.h>

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#define PUT_MEM(s, c, w) \

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do { \

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memmove(w, s, c); \

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w += c; \

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} while (0)

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* Regions.

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#define REGION_SIZE(r) ((unsigned int)((r).rend - (r).rstart))

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#define REGION_EMPTY(r) ((r).rstart == (r).rend)

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#define REGION_FROMSTRING(r, s) do { \

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(r).rstart = (unsigned char *)s; \

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(r).rend = (r).rstart + strlen(s); \

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} while (0)

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/*%

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* Use this to remove the const qualifier of a variable to assign it to

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* a non-const variable or pass it as a non-const function argument ...

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* but only when you are sure it won't then be changed!

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* This is necessary to sometimes shut up some compilers

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* (as with gcc -Wcast-qual) when there is just no other good way to avoid the

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* situation.

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#define DE_CONST(konst, var) \

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do { \

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union { const void *k; void *v; } _u; \

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_u.k = konst; \

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var = _u.v; \

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} while (0)

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#endif /* ISCCC_UTIL_H */

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