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Edit File : util.h \| Size : 4.89 KB
/* * 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 https://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 <inttypes.h> #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 = (uint64_t)w[0] << 56; \ v \|= (uint64_t)w[1] << 48; \ v \|= (uint64_t)w[2] << 40; \ v \|= (uint64_t)w[3] << 32; \ v \|= (uint64_t)w[4] << 24; \ v \|= (uint64_t)w[5] << 16; \ v \|= (uint64_t)w[6] << 8; \ v \|= (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 */ Back

Edit File : util.h | Size : 4.89 KB

/*
 * 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 https://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 <inttypes.h>

#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 = (uint64_t)w[0] << 56; \
		v |= (uint64_t)w[1] << 48; \
		v |= (uint64_t)w[2] << 40; \
		v |= (uint64_t)w[3] << 32; \
		v |= (uint64_t)w[4] << 24; \
		v |= (uint64_t)w[5] << 16; \
		v |= (uint64_t)w[6] << 8; \
		v |= (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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