| subr_clock.c (331496) | subr_clock.c (331503) |
|---|---|
| 1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by --- 27 unchanged lines hidden (view full) --- 36 * from: Utah $Hdr: clock.c 1.18 91/01/21$ 37 * from: @(#)clock.c 8.2 (Berkeley) 1/12/94 38 * from: NetBSD: clock_subr.c,v 1.6 2001/07/07 17:04:02 thorpej Exp 39 * and 40 * from: src/sys/i386/isa/clock.c,v 1.176 2001/09/04 41 */ 42 43#include <sys/cdefs.h> | 1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by --- 27 unchanged lines hidden (view full) --- 36 * from: Utah $Hdr: clock.c 1.18 91/01/21$ 37 * from: @(#)clock.c 8.2 (Berkeley) 1/12/94 38 * from: NetBSD: clock_subr.c,v 1.6 2001/07/07 17:04:02 thorpej Exp 39 * and 40 * from: src/sys/i386/isa/clock.c,v 1.176 2001/09/04 41 */ 42 43#include <sys/cdefs.h> |
| 44__FBSDID("$FreeBSD: stable/11/sys/kern/subr_clock.c 331496 2018-03-24 20:40:16Z ian $"); | 44__FBSDID("$FreeBSD: stable/11/sys/kern/subr_clock.c 331503 2018-03-24 23:01:10Z ian $"); |
| 45 46#include <sys/param.h> 47#include <sys/systm.h> 48#include <sys/kernel.h> 49#include <sys/bus.h> 50#include <sys/clock.h> 51#include <sys/limits.h> 52#include <sys/sysctl.h> --- 50 unchanged lines hidden (view full) --- 103 * Optimization: using a precomputed count of days between POSIX_BASE_YEAR and 104 * some recent year avoids lots of unnecessary loop iterations in conversion. 105 * recent_base_days is the number of days before the start of recent_base_year. 106 */ 107static const int recent_base_year = 2017; 108static const int recent_base_days = 17167; 109 110/* | 45 46#include <sys/param.h> 47#include <sys/systm.h> 48#include <sys/kernel.h> 49#include <sys/bus.h> 50#include <sys/clock.h> 51#include <sys/limits.h> 52#include <sys/sysctl.h> --- 50 unchanged lines hidden (view full) --- 103 * Optimization: using a precomputed count of days between POSIX_BASE_YEAR and 104 * some recent year avoids lots of unnecessary loop iterations in conversion. 105 * recent_base_days is the number of days before the start of recent_base_year. 106 */ 107static const int recent_base_year = 2017; 108static const int recent_base_days = 17167; 109 110/* |
| 111 * Table to 'calculate' pow(10, 9 - nsdigits) via lookup of nsdigits. 112 * Before doing the lookup, the code asserts 0 <= nsdigits <= 9. 113 */ 114static u_int nsdivisors[] = { 115 1000000000, 100000000, 10000000, 1000000, 100000, 10000, 1000, 100, 10, 1 116}; 117 118/* |
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| 111 * This inline avoids some unnecessary modulo operations 112 * as compared with the usual macro: 113 * ( ((year % 4) == 0 && 114 * (year % 100) != 0) || 115 * ((year % 400) == 0) ) 116 * It is otherwise equivalent. 117 */ 118static int --- 7 unchanged lines hidden (view full) --- 126 rv = 0; 127 if ((year % 400) == 0) 128 rv = 1; 129 } 130 } 131 return (rv); 132} 133 | 119 * This inline avoids some unnecessary modulo operations 120 * as compared with the usual macro: 121 * ( ((year % 4) == 0 && 122 * (year % 100) != 0) || 123 * ((year % 400) == 0) ) 124 * It is otherwise equivalent. 125 */ 126static int --- 7 unchanged lines hidden (view full) --- 134 rv = 0; 135 if ((year % 400) == 0) 136 rv = 1; 137 } 138 } 139 return (rv); 140} 141 |
| 134static void 135print_ct(struct clocktime *ct) 136{ 137 printf("[%04d-%02d-%02d %02d:%02d:%02d]", 138 ct->year, ct->mon, ct->day, 139 ct->hour, ct->min, ct->sec); 140} 141 | |
| 142int | 142int |
| 143clock_ct_to_ts(struct clocktime *ct, struct timespec *ts) | 143clock_ct_to_ts(const struct clocktime *ct, struct timespec *ts) |
| 144{ 145 int i, year, days; 146 147 if (ct_debug) { | 144{ 145 int i, year, days; 146 147 if (ct_debug) { |
| 148 printf("ct_to_ts("); 149 print_ct(ct); 150 printf(")"); | 148 printf("ct_to_ts(["); 149 clock_print_ct(ct, 9); 150 printf("])"); |
| 151 } 152 153 /* 154 * Many realtime clocks store the year as 2-digit BCD; pivot on 70 to 155 * determine century. Some clocks have a "century bit" and drivers do 156 * year += 100, so interpret values between 70-199 as relative to 1900. 157 */ 158 year = ct->year; --- 36 unchanged lines hidden (view full) --- 195 ts->tv_nsec = ct->nsec; 196 197 if (ct_debug) 198 printf(" = %jd.%09ld\n", (intmax_t)ts->tv_sec, ts->tv_nsec); 199 return (0); 200} 201 202int | 151 } 152 153 /* 154 * Many realtime clocks store the year as 2-digit BCD; pivot on 70 to 155 * determine century. Some clocks have a "century bit" and drivers do 156 * year += 100, so interpret values between 70-199 as relative to 1900. 157 */ 158 year = ct->year; --- 36 unchanged lines hidden (view full) --- 195 ts->tv_nsec = ct->nsec; 196 197 if (ct_debug) 198 printf(" = %jd.%09ld\n", (intmax_t)ts->tv_sec, ts->tv_nsec); 199 return (0); 200} 201 202int |
| 203clock_bcd_to_ts(struct bcd_clocktime *bct, struct timespec *ts, bool ampm) | 203clock_bcd_to_ts(const struct bcd_clocktime *bct, struct timespec *ts, bool ampm) |
| 204{ 205 struct clocktime ct; 206 int bcent, byear; 207 208 /* 209 * Year may come in as 2-digit or 4-digit BCD. Split the value into 210 * separate BCD century and year values for validation and conversion. 211 */ --- 32 unchanged lines hidden (view full) --- 244 if (bct->ispm) 245 ct.hour += 12; 246 } 247 248 return (clock_ct_to_ts(&ct, ts)); 249} 250 251void | 204{ 205 struct clocktime ct; 206 int bcent, byear; 207 208 /* 209 * Year may come in as 2-digit or 4-digit BCD. Split the value into 210 * separate BCD century and year values for validation and conversion. 211 */ --- 32 unchanged lines hidden (view full) --- 244 if (bct->ispm) 245 ct.hour += 12; 246 } 247 248 return (clock_ct_to_ts(&ct, ts)); 249} 250 251void |
| 252clock_ts_to_ct(struct timespec *ts, struct clocktime *ct) | 252clock_ts_to_ct(const struct timespec *ts, struct clocktime *ct) |
| 253{ 254 int i, year, days; 255 time_t rsec; /* remainder seconds */ 256 time_t secs; 257 258 secs = ts->tv_sec; 259 days = secs / SECDAY; 260 rsec = secs % SECDAY; --- 22 unchanged lines hidden (view full) --- 283 /* Hours, minutes, seconds are easy */ 284 ct->hour = rsec / 3600; 285 rsec = rsec % 3600; 286 ct->min = rsec / 60; 287 rsec = rsec % 60; 288 ct->sec = rsec; 289 ct->nsec = ts->tv_nsec; 290 if (ct_debug) { | 253{ 254 int i, year, days; 255 time_t rsec; /* remainder seconds */ 256 time_t secs; 257 258 secs = ts->tv_sec; 259 days = secs / SECDAY; 260 rsec = secs % SECDAY; --- 22 unchanged lines hidden (view full) --- 283 /* Hours, minutes, seconds are easy */ 284 ct->hour = rsec / 3600; 285 rsec = rsec % 3600; 286 ct->min = rsec / 60; 287 rsec = rsec % 60; 288 ct->sec = rsec; 289 ct->nsec = ts->tv_nsec; 290 if (ct_debug) { |
| 291 printf("ts_to_ct(%jd.%09ld) = ", | 291 printf("ts_to_ct(%jd.%09ld) = [", |
| 292 (intmax_t)ts->tv_sec, ts->tv_nsec); | 292 (intmax_t)ts->tv_sec, ts->tv_nsec); |
| 293 print_ct(ct); 294 printf("\n"); | 293 clock_print_ct(ct, 9); 294 printf("]\n"); |
| 295 } 296} 297 298void | 295 } 296} 297 298void |
| 299clock_ts_to_bcd(struct timespec *ts, struct bcd_clocktime *bct, bool ampm) | 299clock_ts_to_bcd(const struct timespec *ts, struct bcd_clocktime *bct, bool ampm) |
| 300{ 301 struct clocktime ct; 302 303 clock_ts_to_ct(ts, &ct); 304 305 /* If asked to handle am/pm, convert from 24hr to 12hr+pmflag. */ 306 bct->ispm = false; 307 if (ampm) { --- 10 unchanged lines hidden (view full) --- 318 bct->day = TOBCD(ct.day); 319 bct->hour = TOBCD(ct.hour); 320 bct->min = TOBCD(ct.min); 321 bct->sec = TOBCD(ct.sec); 322 bct->dow = ct.dow; 323 bct->nsec = ct.nsec; 324} 325 | 300{ 301 struct clocktime ct; 302 303 clock_ts_to_ct(ts, &ct); 304 305 /* If asked to handle am/pm, convert from 24hr to 12hr+pmflag. */ 306 bct->ispm = false; 307 if (ampm) { --- 10 unchanged lines hidden (view full) --- 318 bct->day = TOBCD(ct.day); 319 bct->hour = TOBCD(ct.hour); 320 bct->min = TOBCD(ct.min); 321 bct->sec = TOBCD(ct.sec); 322 bct->dow = ct.dow; 323 bct->nsec = ct.nsec; 324} 325 |
| 326void 327clock_print_bcd(const struct bcd_clocktime *bct, int nsdigits) 328{ 329 330 KASSERT(nsdigits >= 0 && nsdigits <= 9, ("bad nsdigits %d", nsdigits)); 331 332 if (nsdigits > 0) { 333 printf("%4.4x-%2.2x-%2.2x %2.2x:%2.2x:%2.2x.%*.*ld", 334 bct->year, bct->mon, bct->day, 335 bct->hour, bct->min, bct->sec, 336 nsdigits, nsdigits, bct->nsec / nsdivisors[nsdigits]); 337 } else { 338 printf("%4.4x-%2.2x-%2.2x %2.2x:%2.2x:%2.2x", 339 bct->year, bct->mon, bct->day, 340 bct->hour, bct->min, bct->sec); 341 } 342} 343 344void 345clock_print_ct(const struct clocktime *ct, int nsdigits) 346{ 347 348 KASSERT(nsdigits >= 0 && nsdigits <= 9, ("bad nsdigits %d", nsdigits)); 349 350 if (nsdigits > 0) { 351 printf("%04d-%02d-%02d %02d:%02d:%02d.%*.*ld", 352 ct->year, ct->mon, ct->day, 353 ct->hour, ct->min, ct->sec, 354 nsdigits, nsdigits, ct->nsec / nsdivisors[nsdigits]); 355 } else { 356 printf("%04d-%02d-%02d %02d:%02d:%02d", 357 ct->year, ct->mon, ct->day, 358 ct->hour, ct->min, ct->sec); 359 } 360} 361 362void 363clock_print_ts(const struct timespec *ts, int nsdigits) 364{ 365 struct clocktime ct; 366 367 clock_ts_to_ct(ts, &ct); 368 clock_print_ct(&ct, nsdigits); 369} 370 |
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| 326int 327utc_offset(void) 328{ 329 330 return (tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)); 331} | 371int 372utc_offset(void) 373{ 374 375 return (tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)); 376} |