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| -rw-r--r-- | lib/isccc/include/isccc/util.h | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/lib/isccc/include/isccc/util.h b/lib/isccc/include/isccc/util.h new file mode 100644 index 0000000..58e69b3 --- /dev/null +++ b/lib/isccc/include/isccc/util.h @@ -0,0 +1,220 @@ +/* + * 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 <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 */ |