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- /*
- * Portions Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Portions Copyright (C) 2001 Internet Software Consortium.
- * Portions Copyright (C) 2001 Nominum, Inc.
- *
- * Permission to use, copy, modify, and 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.
- */
-
- /* $Id: util.h,v 1.4.18.2 2005/04/29 00:17:14 marka Exp $ */
-
- #ifndef ISCCC_UTIL_H
- #define ISCCC_UTIL_H 1
-
- #include <isc/util.h>
-
- /*! \file
- * \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 { \
- memcpy(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 { \
- memcpy(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 */
-