2 * ntp_types.h - defines how int32 and u_int32 are treated.
3 * For 64 bit systems like the DEC Alpha, they have to be defined
5 * For 32 bit systems, define them as long and u_long
10 * Set up for prototyping
13 #if defined(__STDC__) || defined(HAVE_PROTOTYPES)
15 #else /* not __STDC__ and not HAVE_PROTOTYPES */
17 #endif /* not __STDC__ and HAVE_PROTOTYPES */
21 * VMS DECC (v4.1), {u_char,u_short,u_long} are only in SOCKET.H,
22 * and u_int isn't defined anywhere
26 typedef unsigned int u_int;
28 * Note: VMS DECC has long == int (even on __alpha),
29 * so the distinction below doesn't matter
38 # define u_int32 unsigned int
40 #else /* not sizeof(int) == 4 */
41 # if (SIZEOF_LONG == 4)
42 # else /* not sizeof(long) == 4 */
47 # define u_int32 unsigned long
49 # endif /* not sizeof(long) == 4 */
50 # include "Bletch: what's 32 bits on this machine?"
51 #endif /* not sizeof(int) == 4 */
53 typedef unsigned short associd_t; /* association ID */
54 typedef u_int32 keyid_t; /* cryptographic key ID */
55 typedef u_int32 tstamp_t; /* NTP seconds timestamp */
58 * NTP uses two fixed point formats. The first (l_fp) is the "long"
59 * format and is 64 bits long with the decimal between bits 31 and 32.
60 * This is used for time stamps in the NTP packet header (in network
61 * byte order) and for internal computations of offsets (in local host
62 * byte order). We use the same structure for both signed and unsigned
63 * values, which is a big hack but saves rewriting all the operators
64 * twice. Just to confuse this, we also sometimes just carry the
65 * fractional part in calculations, in both signed and unsigned forms.
66 * Anyway, an l_fp looks like:
69 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
70 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
72 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
74 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
88 #define l_ui Ul_i.Xl_ui /* unsigned integral part */
89 #define l_i Ul_i.Xl_i /* signed integral part */
90 #define l_uf Ul_f.Xl_uf /* unsigned fractional part */
91 #define l_f Ul_f.Xl_f /* signed fractional part */
94 * Fractional precision (of an l_fp) is actually the number of
97 #define FRACTION_PREC (32)
101 * The second fixed point format is 32 bits, with the decimal between
102 * bits 15 and 16. There is a signed version (s_fp) and an unsigned
103 * version (u_fp). This is used to represent synchronizing distance
104 * and synchronizing dispersion in the NTP packet header (again, in
105 * network byte order) and internally to hold both distance and
106 * dispersion values (in local byte order). In network byte order
110 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
111 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
112 * | Integer Part | Fraction Part |
113 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
117 typedef u_int32 u_fp;
120 * A unit second in fp format. Actually 2**(half_the_bits_in_a_long)
122 #define FP_SECOND (0x10000)
125 * Byte order conversions
127 #define HTONS_FP(x) (htonl(x))
128 #define HTONL_FP(h, n) do { (n)->l_ui = htonl((h)->l_ui); \
129 (n)->l_uf = htonl((h)->l_uf); } while (0)
130 #define NTOHS_FP(x) (ntohl(x))
131 #define NTOHL_FP(n, h) do { (h)->l_ui = ntohl((n)->l_ui); \
132 (h)->l_uf = ntohl((n)->l_uf); } while (0)
133 #define NTOHL_MFP(ni, nf, hi, hf) \
134 do { (hi) = ntohl(ni); (hf) = ntohl(nf); } while (0)
135 #define HTONL_MFP(hi, hf, ni, nf) \
136 do { (ni) = ntohl(hi); (nf) = ntohl(hf); } while (0)
138 /* funny ones. Converts ts fractions to net order ts */
139 #define HTONL_UF(uf, nts) \
140 do { (nts)->l_ui = 0; (nts)->l_uf = htonl(uf); } while (0)
141 #define HTONL_F(f, nts) do { (nts)->l_uf = htonl(f); \
142 if ((f) & 0x80000000) \
149 * Conversions between the two fixed point types
151 #define MFPTOFP(x_i, x_f) (((x_i) >= 0x00010000) ? 0x7fffffff : \
152 (((x_i) <= -0x00010000) ? 0x80000000 : \
153 (((x_i)<<16) | (((x_f)>>16)&0xffff))))
154 #define LFPTOFP(v) MFPTOFP((v)->l_i, (v)->l_f)
156 #define UFPTOLFP(x, v) ((v)->l_ui = (u_fp)(x)>>16, (v)->l_uf = (x)<<16)
157 #define FPTOLFP(x, v) (UFPTOLFP((x), (v)), (x) < 0 ? (v)->l_ui -= 0x10000 : 0)
159 #define MAXLFP(v) ((v)->l_ui = 0x7fffffff, (v)->l_uf = 0xffffffff)
160 #define MINLFP(v) ((v)->l_ui = 0x80000000, (v)->l_uf = 0)
163 * Primitive operations on long fixed point values. If these are
164 * reminiscent of assembler op codes it's only because some may
165 * be replaced by inline assembler for particular machines someday.
166 * These are the (kind of inefficient) run-anywhere versions.
168 #define M_NEG(v_i, v_f) /* v = -v */ \
171 (v_i) = -((s_fp)(v_i)); \
173 (v_f) = -((s_fp)(v_f)); \
178 #define M_NEGM(r_i, r_f, a_i, a_f) /* r = -a */ \
189 #define M_ADD(r_i, r_f, a_i, a_f) /* r += a */ \
191 register u_int32 lo_tmp; \
192 register u_int32 hi_tmp; \
194 lo_tmp = ((r_f) & 0xffff) + ((a_f) & 0xffff); \
195 hi_tmp = (((r_f) >> 16) & 0xffff) + (((a_f) >> 16) & 0xffff); \
196 if (lo_tmp & 0x10000) \
198 (r_f) = ((hi_tmp & 0xffff) << 16) | (lo_tmp & 0xffff); \
201 if (hi_tmp & 0x10000) \
205 #define M_ADD3(r_ovr, r_i, r_f, a_ovr, a_i, a_f) /* r += a, three word */ \
207 register u_int32 lo_tmp; \
208 register u_int32 hi_tmp; \
210 lo_tmp = ((r_f) & 0xffff) + ((a_f) & 0xffff); \
211 hi_tmp = (((r_f) >> 16) & 0xffff) + (((a_f) >> 16) & 0xffff); \
212 if (lo_tmp & 0x10000) \
214 (r_f) = ((hi_tmp & 0xffff) << 16) | (lo_tmp & 0xffff); \
216 lo_tmp = ((r_i) & 0xffff) + ((a_i) & 0xffff); \
217 if (hi_tmp & 0x10000) \
219 hi_tmp = (((r_i) >> 16) & 0xffff) + (((a_i) >> 16) & 0xffff); \
220 if (lo_tmp & 0x10000) \
222 (r_i) = ((hi_tmp & 0xffff) << 16) | (lo_tmp & 0xffff); \
224 (r_ovr) += (a_ovr); \
225 if (hi_tmp & 0x10000) \
229 #define M_SUB(r_i, r_f, a_i, a_f) /* r -= a */ \
231 register u_int32 lo_tmp; \
232 register u_int32 hi_tmp; \
237 lo_tmp = ((r_f) & 0xffff) + ((-((s_fp)(a_f))) & 0xffff); \
238 hi_tmp = (((r_f) >> 16) & 0xffff) \
239 + (((-((s_fp)(a_f))) >> 16) & 0xffff); \
240 if (lo_tmp & 0x10000) \
242 (r_f) = ((hi_tmp & 0xffff) << 16) | (lo_tmp & 0xffff); \
245 if (hi_tmp & 0x10000) \
250 #define M_RSHIFTU(v_i, v_f) /* v >>= 1, v is unsigned */ \
252 (v_f) = (u_int32)(v_f) >> 1; \
254 (v_f) |= 0x80000000; \
255 (v_i) = (u_int32)(v_i) >> 1; \
258 #define M_RSHIFT(v_i, v_f) /* v >>= 1, v is signed */ \
260 (v_f) = (u_int32)(v_f) >> 1; \
262 (v_f) |= 0x80000000; \
263 if ((v_i) & 0x80000000) \
264 (v_i) = ((v_i) >> 1) | 0x80000000; \
266 (v_i) = (v_i) >> 1; \
269 #define M_LSHIFT(v_i, v_f) /* v <<= 1 */ \
272 if ((v_f) & 0x80000000) \
277 #define M_LSHIFT3(v_ovr, v_i, v_f) /* v <<= 1, with overflow */ \
280 if ((v_i) & 0x80000000) \
283 if ((v_f) & 0x80000000) \
288 #define M_ADDUF(r_i, r_f, uf) /* r += uf, uf is u_int32 fraction */ \
289 M_ADD((r_i), (r_f), 0, (uf)) /* let optimizer worry about it */
291 #define M_SUBUF(r_i, r_f, uf) /* r -= uf, uf is u_int32 fraction */ \
292 M_SUB((r_i), (r_f), 0, (uf)) /* let optimizer worry about it */
294 #define M_ADDF(r_i, r_f, f) /* r += f, f is a int32 fraction */ \
297 M_ADD((r_i), (r_f), 0, (f)); \
299 M_ADD((r_i), (r_f), (-1), (f));\
302 #define M_ISNEG(v_i, v_f) /* v < 0 */ \
303 (((v_i) & 0x80000000) != 0)
305 #define M_ISHIS(a_i, a_f, b_i, b_f) /* a >= b unsigned */ \
306 (((u_int32)(a_i)) > ((u_int32)(b_i)) || \
307 ((a_i) == (b_i) && ((u_int32)(a_f)) >= ((u_int32)(b_f))))
309 #define M_ISGEQ(a_i, a_f, b_i, b_f) /* a >= b signed */ \
310 (((int32)(a_i)) > ((int32)(b_i)) || \
311 ((a_i) == (b_i) && ((u_int32)(a_f)) >= ((u_int32)(b_f))))
313 #define M_ISEQU(a_i, a_f, b_i, b_f) /* a == b unsigned */ \
314 ((a_i) == (b_i) && (a_f) == (b_f))
317 * Operations on the long fp format
319 #define L_ADD(r, a) M_ADD((r)->l_ui, (r)->l_uf, (a)->l_ui, (a)->l_uf)
320 #define L_SUB(r, a) M_SUB((r)->l_ui, (r)->l_uf, (a)->l_ui, (a)->l_uf)
321 #define L_NEG(v) M_NEG((v)->l_ui, (v)->l_uf)
322 #define L_ADDUF(r, uf) M_ADDUF((r)->l_ui, (r)->l_uf, (uf))
323 #define L_SUBUF(r, uf) M_SUBUF((r)->l_ui, (r)->l_uf, (uf))
324 #define L_ADDF(r, f) M_ADDF((r)->l_ui, (r)->l_uf, (f))
325 #define L_RSHIFT(v) M_RSHIFT((v)->l_i, (v)->l_uf)
326 #define L_RSHIFTU(v) M_RSHIFT((v)->l_ui, (v)->l_uf)
327 #define L_LSHIFT(v) M_LSHIFT((v)->l_ui, (v)->l_uf)
328 #define L_CLR(v) ((v)->l_ui = (v)->l_uf = 0)
330 #define L_ISNEG(v) (((v)->l_ui & 0x80000000) != 0)
331 #define L_ISZERO(v) ((v)->l_ui == 0 && (v)->l_uf == 0)
332 #define L_ISHIS(a, b) ((a)->l_ui > (b)->l_ui || \
333 ((a)->l_ui == (b)->l_ui && (a)->l_uf >= (b)->l_uf))
334 #define L_ISGEQ(a, b) ((a)->l_i > (b)->l_i || \
335 ((a)->l_i == (b)->l_i && (a)->l_uf >= (b)->l_uf))
336 #define L_ISEQU(a, b) M_ISEQU((a)->l_ui, (a)->l_uf, (b)->l_ui, (b)->l_uf)
339 * s_fp/double and u_fp/double conversions
341 #define FRIC 65536. /* 2^16 as a double */
342 #define DTOFP(r) ((s_fp)((r) * FRIC))
343 #define DTOUFP(r) ((u_fp)((r) * FRIC))
344 #define FPTOD(r) ((double)(r) / FRIC)
347 * l_fp/double conversions
349 #define FRAC 4294967296. /* 2^32 as a double */
350 #define M_DTOLFP(d, r_i, r_uf) /* double to l_fp */ \
352 register double d_tmp; \
357 (r_i) = (int32)(d_tmp); \
358 (r_uf) = (u_int32)(((d_tmp) - (double)(r_i)) * FRAC); \
359 M_NEG((r_i), (r_uf)); \
361 (r_i) = (int32)(d_tmp); \
362 (r_uf) = (u_int32)(((d_tmp) - (double)(r_i)) * FRAC); \
365 #define M_LFPTOD(r_i, r_uf, d) /* l_fp to double */ \
367 register l_fp l_tmp; \
370 l_tmp.l_f = (r_uf); \
371 if (l_tmp.l_i < 0) { \
372 M_NEG(l_tmp.l_i, l_tmp.l_uf); \
373 (d) = -((double)l_tmp.l_i + ((double)l_tmp.l_uf) / FRAC); \
375 (d) = (double)l_tmp.l_i + ((double)l_tmp.l_uf) / FRAC; \
378 #define DTOLFP(d, v) M_DTOLFP((d), (v)->l_ui, (v)->l_uf)
379 #define LFPTOD(v, d) M_LFPTOD((v)->l_ui, (v)->l_uf, (d))
385 extern char * dofptoa P((u_fp, int, short, int));
386 extern char * dolfptoa P((u_long, u_long, int, short, int));
389 extern int atolfp P((const char *, l_fp *));
390 extern int buftvtots P((const char *, l_fp *));
391 extern char * fptoa P((s_fp, short));
392 extern char * fptoms P((s_fp, short));
393 extern int hextolfp P((const char *, l_fp *));
394 extern void gpstolfp P((int, int, unsigned long, l_fp *));
395 extern int mstolfp P((const char *, l_fp *));
396 extern char * prettydate P((l_fp *));
397 extern char * gmprettydate P((l_fp *));
398 extern char * uglydate P((l_fp *));
399 extern void mfp_mul P((int32 *, u_int32 *, int32, u_int32, int32, u_int32));
401 extern void get_systime P((l_fp *));
402 extern int step_systime P((double));
403 extern int adj_systime P((double));
405 #define lfptoa(_fpv, _ndec) mfptoa((_fpv)->l_ui, (_fpv)->l_uf, (_ndec))
406 #define lfptoms(_fpv, _ndec) mfptoms((_fpv)->l_ui, (_fpv)->l_uf, (_ndec))
408 #define ufptoa(_fpv, _ndec) dofptoa((_fpv), 0, (_ndec), 0)
409 #define ufptoms(_fpv, _ndec) dofptoa((_fpv), 0, (_ndec), 1)
410 #define ulfptoa(_fpv, _ndec) dolfptoa((_fpv)->l_ui, (_fpv)->l_uf, 0, (_ndec), 0)
411 #define ulfptoms(_fpv, _ndec) dolfptoa((_fpv)->l_ui, (_fpv)->l_uf, 0, (_ndec), 1)
412 #define umfptoa(_fpi, _fpf, _ndec) dolfptoa((_fpi), (_fpf), 0, (_ndec), 0)