/* * 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 INTERNET SOFTWARE CONSORTIUM AND * NOMINUM DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT * SHALL INTERNET SOFTWARE CONSORTIUM OR NOMINUM 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 1.2 2001/03/27 20:08:15 bwelling Exp \$ */ #ifndef ISCCC_UTIL_H #define ISCCC_UTIL_H 1 #include /* * 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 #define PUT_MEM(s, c, w) \ do { \ memcpy(w, s, c); \ w += c; \ } while (0) /* * Byte swapping */ #include #include #include #define N2HO(v) ntohl(v) #define H2NO(v) htonl(v) /* * 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 */