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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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