1 | #ifndef PRIVATE_H |
2 | |
3 | #define PRIVATE_H |
4 | |
5 | /* |
6 | ** This file is in the public domain, so clarified as of |
7 | ** 1996-06-05 by Arthur David Olson. |
8 | */ |
9 | |
10 | /* |
11 | ** This header is for use ONLY with the time conversion code. |
12 | ** There is no guarantee that it will remain unchanged, |
13 | ** or that it will remain at all. |
14 | ** Do NOT copy it to any system include directory. |
15 | ** Thank you! |
16 | */ |
17 | |
18 | /* This string was in the Factory zone through version 2016f. */ |
19 | #define GRANDPARENTED "Local time zone must be set--see zic manual page" |
20 | |
21 | /* |
22 | ** Defaults for preprocessor symbols. |
23 | ** You can override these in your C compiler options, e.g. '-DHAVE_GETTEXT=1'. |
24 | */ |
25 | |
26 | #ifndef HAVE_DECL_ASCTIME_R |
27 | #define HAVE_DECL_ASCTIME_R 1 |
28 | #endif |
29 | |
30 | #ifndef HAVE_GETTEXT |
31 | #define HAVE_GETTEXT 0 |
32 | #endif /* !defined HAVE_GETTEXT */ |
33 | |
34 | #ifndef HAVE_INCOMPATIBLE_CTIME_R |
35 | #define HAVE_INCOMPATIBLE_CTIME_R 0 |
36 | #endif /* !defined INCOMPATIBLE_CTIME_R */ |
37 | |
38 | #ifndef HAVE_LINK |
39 | #define HAVE_LINK 1 |
40 | #endif /* !defined HAVE_LINK */ |
41 | |
42 | #ifndef HAVE_POSIX_DECLS |
43 | #define HAVE_POSIX_DECLS 1 |
44 | #endif |
45 | |
46 | #ifndef HAVE_STRDUP |
47 | #define HAVE_STRDUP 1 |
48 | #endif |
49 | |
50 | #ifndef HAVE_SYMLINK |
51 | #define HAVE_SYMLINK 1 |
52 | #endif /* !defined HAVE_SYMLINK */ |
53 | |
54 | #ifndef HAVE_SYS_STAT_H |
55 | #define HAVE_SYS_STAT_H 1 |
56 | #endif /* !defined HAVE_SYS_STAT_H */ |
57 | |
58 | #ifndef HAVE_SYS_WAIT_H |
59 | #define HAVE_SYS_WAIT_H 1 |
60 | #endif /* !defined HAVE_SYS_WAIT_H */ |
61 | |
62 | #ifndef HAVE_UNISTD_H |
63 | #define HAVE_UNISTD_H 1 |
64 | #endif /* !defined HAVE_UNISTD_H */ |
65 | |
66 | #ifndef HAVE_UTMPX_H |
67 | #define HAVE_UTMPX_H 1 |
68 | #endif /* !defined HAVE_UTMPX_H */ |
69 | |
70 | #ifndef NETBSD_INSPIRED |
71 | # define NETBSD_INSPIRED 1 |
72 | #endif |
73 | |
74 | #if HAVE_INCOMPATIBLE_CTIME_R |
75 | #define asctime_r _incompatible_asctime_r |
76 | #define ctime_r _incompatible_ctime_r |
77 | #endif /* HAVE_INCOMPATIBLE_CTIME_R */ |
78 | |
79 | /* Enable tm_gmtoff and tm_zone on GNUish systems. */ |
80 | #define _GNU_SOURCE 1 |
81 | /* Fix asctime_r on Solaris 11. */ |
82 | #define _POSIX_PTHREAD_SEMANTICS 1 |
83 | /* Enable strtoimax on pre-C99 Solaris 11. */ |
84 | #define __EXTENSIONS__ 1 |
85 | |
86 | /* |
87 | ** Nested includes |
88 | */ |
89 | |
90 | /* Avoid clashes with NetBSD by renaming NetBSD's declarations. */ |
91 | #define localtime_rz sys_localtime_rz |
92 | #define mktime_z sys_mktime_z |
93 | #define posix2time_z sys_posix2time_z |
94 | #define time2posix_z sys_time2posix_z |
95 | #define timezone_t sys_timezone_t |
96 | #define tzalloc sys_tzalloc |
97 | #define tzfree sys_tzfree |
98 | #include <time.h> |
99 | #undef localtime_rz |
100 | #undef mktime_z |
101 | #undef posix2time_z |
102 | #undef time2posix_z |
103 | #undef timezone_t |
104 | #undef tzalloc |
105 | #undef tzfree |
106 | |
107 | #include <sys/types.h> /* for time_t */ |
108 | #include <stdio.h> |
109 | #include <string.h> |
110 | #include <limits.h> /* for CHAR_BIT et al. */ |
111 | #include <stdlib.h> |
112 | |
113 | #include <errno.h> |
114 | |
115 | #ifndef ENAMETOOLONG |
116 | # define ENAMETOOLONG EINVAL |
117 | #endif |
118 | #ifndef ENOTSUP |
119 | # define ENOTSUP EINVAL |
120 | #endif |
121 | #ifndef EOVERFLOW |
122 | # define EOVERFLOW EINVAL |
123 | #endif |
124 | |
125 | #if HAVE_GETTEXT |
126 | #include <libintl.h> |
127 | #endif /* HAVE_GETTEXT */ |
128 | |
129 | #if HAVE_SYS_WAIT_H |
130 | #include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */ |
131 | #endif /* HAVE_SYS_WAIT_H */ |
132 | |
133 | #ifndef WIFEXITED |
134 | #define WIFEXITED(status) (((status) & 0xff) == 0) |
135 | #endif /* !defined WIFEXITED */ |
136 | #ifndef WEXITSTATUS |
137 | #define WEXITSTATUS(status) (((status) >> 8) & 0xff) |
138 | #endif /* !defined WEXITSTATUS */ |
139 | |
140 | #if HAVE_UNISTD_H |
141 | #include <unistd.h> /* for F_OK, R_OK, and other POSIX goodness */ |
142 | #endif /* HAVE_UNISTD_H */ |
143 | |
144 | #ifndef HAVE_STRFTIME_L |
145 | # if _POSIX_VERSION < 200809 |
146 | # define HAVE_STRFTIME_L 0 |
147 | # else |
148 | # define HAVE_STRFTIME_L 1 |
149 | # endif |
150 | #endif |
151 | |
152 | #ifndef F_OK |
153 | #define F_OK 0 |
154 | #endif /* !defined F_OK */ |
155 | #ifndef R_OK |
156 | #define R_OK 4 |
157 | #endif /* !defined R_OK */ |
158 | |
159 | /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */ |
160 | #define is_digit(c) ((unsigned)(c) - '0' <= 9) |
161 | |
162 | /* |
163 | ** Define HAVE_STDINT_H's default value here, rather than at the |
164 | ** start, since __GLIBC__ and INTMAX_MAX's values depend on |
165 | ** previously-included files. glibc 2.1 and Solaris 10 and later have |
166 | ** stdint.h, even with pre-C99 compilers. |
167 | */ |
168 | #ifndef HAVE_STDINT_H |
169 | #define HAVE_STDINT_H \ |
170 | (199901 <= __STDC_VERSION__ \ |
171 | || 2 < __GLIBC__ + (1 <= __GLIBC_MINOR__) \ |
172 | || __CYGWIN__ || INTMAX_MAX) |
173 | #endif /* !defined HAVE_STDINT_H */ |
174 | |
175 | #if HAVE_STDINT_H |
176 | #include <stdint.h> |
177 | #endif /* !HAVE_STDINT_H */ |
178 | |
179 | #ifndef HAVE_INTTYPES_H |
180 | # define HAVE_INTTYPES_H HAVE_STDINT_H |
181 | #endif |
182 | #if HAVE_INTTYPES_H |
183 | # include <inttypes.h> |
184 | #endif |
185 | |
186 | /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */ |
187 | #ifdef __LONG_LONG_MAX__ |
188 | # ifndef LLONG_MAX |
189 | # define LLONG_MAX __LONG_LONG_MAX__ |
190 | # endif |
191 | # ifndef LLONG_MIN |
192 | # define LLONG_MIN (-1 - LLONG_MAX) |
193 | # endif |
194 | #endif |
195 | |
196 | #ifndef INT_FAST64_MAX |
197 | # ifdef LLONG_MAX |
198 | typedef long long int_fast64_t; |
199 | # define INT_FAST64_MIN LLONG_MIN |
200 | # define INT_FAST64_MAX LLONG_MAX |
201 | # else |
202 | # if LONG_MAX >> 31 < 0xffffffff |
203 | Please use a compiler that supports a 64-bit integer type (or wider); |
204 | you may need to compile with "-DHAVE_STDINT_H" . |
205 | # endif |
206 | typedef long int_fast64_t; |
207 | # define INT_FAST64_MIN LONG_MIN |
208 | # define INT_FAST64_MAX LONG_MAX |
209 | # endif |
210 | #endif |
211 | |
212 | #ifndef PRIdFAST64 |
213 | # if INT_FAST64_MAX == LLONG_MAX |
214 | # define PRIdFAST64 "lld" |
215 | # else |
216 | # define PRIdFAST64 "ld" |
217 | # endif |
218 | #endif |
219 | |
220 | #ifndef SCNdFAST64 |
221 | # define SCNdFAST64 PRIdFAST64 |
222 | #endif |
223 | |
224 | #ifndef INT_FAST32_MAX |
225 | # if INT_MAX >> 31 == 0 |
226 | typedef long int_fast32_t; |
227 | # define INT_FAST32_MAX LONG_MAX |
228 | # define INT_FAST32_MIN LONG_MIN |
229 | # else |
230 | typedef int int_fast32_t; |
231 | # define INT_FAST32_MAX INT_MAX |
232 | # define INT_FAST32_MIN INT_MIN |
233 | # endif |
234 | #endif |
235 | |
236 | #ifndef INTMAX_MAX |
237 | # ifdef LLONG_MAX |
238 | typedef long long intmax_t; |
239 | # define strtoimax strtoll |
240 | # define INTMAX_MAX LLONG_MAX |
241 | # define INTMAX_MIN LLONG_MIN |
242 | # else |
243 | typedef long intmax_t; |
244 | # define strtoimax strtol |
245 | # define INTMAX_MAX LONG_MAX |
246 | # define INTMAX_MIN LONG_MIN |
247 | # endif |
248 | #endif |
249 | |
250 | #ifndef PRIdMAX |
251 | # if INTMAX_MAX == LLONG_MAX |
252 | # define PRIdMAX "lld" |
253 | # else |
254 | # define PRIdMAX "ld" |
255 | # endif |
256 | #endif |
257 | |
258 | #ifndef UINT_FAST64_MAX |
259 | # if defined ULLONG_MAX || defined __LONG_LONG_MAX__ |
260 | typedef unsigned long long uint_fast64_t; |
261 | # else |
262 | # if ULONG_MAX >> 31 >> 1 < 0xffffffff |
263 | Please use a compiler that supports a 64-bit integer type (or wider); |
264 | you may need to compile with "-DHAVE_STDINT_H" . |
265 | # endif |
266 | typedef unsigned long uint_fast64_t; |
267 | # endif |
268 | #endif |
269 | |
270 | #ifndef UINTMAX_MAX |
271 | # if defined ULLONG_MAX || defined __LONG_LONG_MAX__ |
272 | typedef unsigned long long uintmax_t; |
273 | # else |
274 | typedef unsigned long uintmax_t; |
275 | # endif |
276 | #endif |
277 | |
278 | #ifndef PRIuMAX |
279 | # if defined ULLONG_MAX || defined __LONG_LONG_MAX__ |
280 | # define PRIuMAX "llu" |
281 | # else |
282 | # define PRIuMAX "lu" |
283 | # endif |
284 | #endif |
285 | |
286 | #ifndef INT32_MAX |
287 | #define INT32_MAX 0x7fffffff |
288 | #endif /* !defined INT32_MAX */ |
289 | #ifndef INT32_MIN |
290 | #define INT32_MIN (-1 - INT32_MAX) |
291 | #endif /* !defined INT32_MIN */ |
292 | |
293 | #ifndef SIZE_MAX |
294 | #define SIZE_MAX ((size_t) -1) |
295 | #endif |
296 | |
297 | #if 2 < __GNUC__ + (96 <= __GNUC_MINOR__) |
298 | # define ATTRIBUTE_CONST __attribute__ ((const)) |
299 | # define ATTRIBUTE_PURE __attribute__ ((__pure__)) |
300 | # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec)) |
301 | #else |
302 | # define ATTRIBUTE_CONST /* empty */ |
303 | # define ATTRIBUTE_PURE /* empty */ |
304 | # define ATTRIBUTE_FORMAT(spec) /* empty */ |
305 | #endif |
306 | |
307 | #if !defined _Noreturn && __STDC_VERSION__ < 201112 |
308 | # if 2 < __GNUC__ + (8 <= __GNUC_MINOR__) |
309 | # define _Noreturn __attribute__ ((__noreturn__)) |
310 | # else |
311 | # define _Noreturn |
312 | # endif |
313 | #endif |
314 | |
315 | #if __STDC_VERSION__ < 199901 && !defined restrict |
316 | # define restrict /* empty */ |
317 | #endif |
318 | |
319 | /* |
320 | ** Workarounds for compilers/systems. |
321 | */ |
322 | |
323 | #ifndef EPOCH_LOCAL |
324 | # define EPOCH_LOCAL 0 |
325 | #endif |
326 | #ifndef EPOCH_OFFSET |
327 | # define EPOCH_OFFSET 0 |
328 | #endif |
329 | |
330 | /* |
331 | ** Compile with -Dtime_tz=T to build the tz package with a private |
332 | ** time_t type equivalent to T rather than the system-supplied time_t. |
333 | ** This debugging feature can test unusual design decisions |
334 | ** (e.g., time_t wider than 'long', or unsigned time_t) even on |
335 | ** typical platforms. |
336 | */ |
337 | #if defined time_tz || EPOCH_LOCAL || EPOCH_OFFSET != 0 |
338 | # ifdef LOCALTIME_IMPLEMENTATION |
339 | static time_t sys_time(time_t *x) { return time(x); } |
340 | # endif |
341 | |
342 | typedef time_tz tz_time_t; |
343 | |
344 | # undef ctime |
345 | # define ctime tz_ctime |
346 | # undef ctime_r |
347 | # define ctime_r tz_ctime_r |
348 | # undef difftime |
349 | # define difftime tz_difftime |
350 | # undef gmtime |
351 | # define gmtime tz_gmtime |
352 | # undef gmtime_r |
353 | # define gmtime_r tz_gmtime_r |
354 | # undef localtime |
355 | # define localtime tz_localtime |
356 | # undef localtime_r |
357 | # define localtime_r tz_localtime_r |
358 | # undef localtime_rz |
359 | # define localtime_rz tz_localtime_rz |
360 | # undef mktime |
361 | # define mktime tz_mktime |
362 | # undef mktime_z |
363 | # define mktime_z tz_mktime_z |
364 | # undef offtime |
365 | # define offtime tz_offtime |
366 | # undef posix2time |
367 | # define posix2time tz_posix2time |
368 | # undef posix2time_z |
369 | # define posix2time_z tz_posix2time_z |
370 | # undef time |
371 | # define time tz_time |
372 | # undef time2posix |
373 | # define time2posix tz_time2posix |
374 | # undef time2posix_z |
375 | # define time2posix_z tz_time2posix_z |
376 | # undef time_t |
377 | # define time_t tz_time_t |
378 | # undef timegm |
379 | # define timegm tz_timegm |
380 | # undef timelocal |
381 | # define timelocal tz_timelocal |
382 | # undef timeoff |
383 | # define timeoff tz_timeoff |
384 | # undef tzalloc |
385 | # define tzalloc tz_tzalloc |
386 | # undef tzfree |
387 | # define tzfree tz_tzfree |
388 | # undef tzset |
389 | # define tzset tz_tzset |
390 | # undef tzsetwall |
391 | # define tzsetwall tz_tzsetwall |
392 | |
393 | char *ctime(time_t const *); |
394 | char *ctime_r(time_t const *, char *); |
395 | double difftime(time_t, time_t); |
396 | struct tm *gmtime(time_t const *); |
397 | struct tm *gmtime_r(time_t const *restrict, struct tm *restrict); |
398 | struct tm *localtime(time_t const *); |
399 | struct tm *localtime_r(time_t const *restrict, struct tm *restrict); |
400 | time_t mktime(struct tm *); |
401 | time_t time(time_t *); |
402 | void tzset(void); |
403 | #endif |
404 | |
405 | #if !HAVE_DECL_ASCTIME_R && !defined asctime_r |
406 | extern char *asctime_r(struct tm const *restrict, char *restrict); |
407 | #endif |
408 | |
409 | #if !HAVE_POSIX_DECLS |
410 | # ifdef USG_COMPAT |
411 | # ifndef timezone |
412 | extern long timezone; |
413 | # endif |
414 | # ifndef daylight |
415 | extern int daylight; |
416 | # endif |
417 | # endif |
418 | #endif |
419 | |
420 | #if defined ALTZONE && !defined altzone |
421 | extern long altzone; |
422 | #endif |
423 | |
424 | /* |
425 | ** The STD_INSPIRED functions are similar, but most also need |
426 | ** declarations if time_tz is defined. |
427 | */ |
428 | |
429 | #ifdef STD_INSPIRED |
430 | # if !defined tzsetwall || defined time_tz |
431 | void tzsetwall(void); |
432 | # endif |
433 | # if !defined offtime || defined time_tz |
434 | struct tm *offtime(time_t const *, long); |
435 | # endif |
436 | # if !defined timegm || defined time_tz |
437 | time_t timegm(struct tm *); |
438 | # endif |
439 | # if !defined timelocal || defined time_tz |
440 | time_t timelocal(struct tm *); |
441 | # endif |
442 | # if !defined timeoff || defined time_tz |
443 | time_t timeoff(struct tm *, long); |
444 | # endif |
445 | # if !defined time2posix || defined time_tz |
446 | time_t time2posix(time_t); |
447 | # endif |
448 | # if !defined posix2time || defined time_tz |
449 | time_t posix2time(time_t); |
450 | # endif |
451 | #endif |
452 | |
453 | /* Infer TM_ZONE on systems where this information is known, but suppress |
454 | guessing if NO_TM_ZONE is defined. Similarly for TM_GMTOFF. */ |
455 | #if (defined __GLIBC__ \ |
456 | || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ \ |
457 | || (defined __APPLE__ && defined __MACH__)) |
458 | # if !defined TM_GMTOFF && !defined NO_TM_GMTOFF |
459 | # define TM_GMTOFF tm_gmtoff |
460 | # endif |
461 | # if !defined TM_ZONE && !defined NO_TM_ZONE |
462 | # define TM_ZONE tm_zone |
463 | # endif |
464 | #endif |
465 | |
466 | /* |
467 | ** Define functions that are ABI compatible with NetBSD but have |
468 | ** better prototypes. NetBSD 6.1.4 defines a pointer type timezone_t |
469 | ** and labors under the misconception that 'const timezone_t' is a |
470 | ** pointer to a constant. This use of 'const' is ineffective, so it |
471 | ** is not done here. What we call 'struct state' NetBSD calls |
472 | ** 'struct __state', but this is a private name so it doesn't matter. |
473 | */ |
474 | #if NETBSD_INSPIRED |
475 | typedef struct state *timezone_t; |
476 | struct tm *localtime_rz(timezone_t restrict, time_t const *restrict, |
477 | struct tm *restrict); |
478 | time_t mktime_z(timezone_t restrict, struct tm *restrict); |
479 | timezone_t tzalloc(char const *); |
480 | void tzfree(timezone_t); |
481 | # ifdef STD_INSPIRED |
482 | # if !defined posix2time_z || defined time_tz |
483 | time_t posix2time_z(timezone_t, time_t) ATTRIBUTE_PURE; |
484 | # endif |
485 | # if !defined time2posix_z || defined time_tz |
486 | time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE; |
487 | # endif |
488 | # endif |
489 | #endif |
490 | |
491 | /* |
492 | ** Finally, some convenience items. |
493 | */ |
494 | |
495 | #if __STDC_VERSION__ < 199901 |
496 | # define true 1 |
497 | # define false 0 |
498 | # define bool int |
499 | #else |
500 | # include <stdbool.h> |
501 | #endif |
502 | |
503 | #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) |
504 | #define TYPE_SIGNED(type) (((type) -1) < 0) |
505 | #define TWOS_COMPLEMENT(t) ((t) ~ (t) 0 < 0) |
506 | |
507 | /* Max and min values of the integer type T, of which only the bottom |
508 | B bits are used, and where the highest-order used bit is considered |
509 | to be a sign bit if T is signed. */ |
510 | #define MAXVAL(t, b) \ |
511 | ((t) (((t) 1 << ((b) - 1 - TYPE_SIGNED(t))) \ |
512 | - 1 + ((t) 1 << ((b) - 1 - TYPE_SIGNED(t))))) |
513 | #define MINVAL(t, b) \ |
514 | ((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0)) |
515 | |
516 | /* The minimum and maximum finite time values. This implementation |
517 | assumes no padding if time_t is signed and either the compiler is |
518 | pre-C11 or time_t is not one of the standard signed integer types. */ |
519 | #if 201112 <= __STDC_VERSION__ |
520 | static time_t const time_t_min |
521 | = (TYPE_SIGNED(time_t) |
522 | ? _Generic((time_t) 0, |
523 | signed char: SCHAR_MIN, short: SHRT_MIN, |
524 | int: INT_MIN, long: LONG_MIN, long long: LLONG_MIN, |
525 | default: MINVAL(time_t, TYPE_BIT(time_t))) |
526 | : 0); |
527 | static time_t const time_t_max |
528 | = (TYPE_SIGNED(time_t) |
529 | ? _Generic((time_t) 0, |
530 | signed char: SCHAR_MAX, short: SHRT_MAX, |
531 | int: INT_MAX, long: LONG_MAX, long long: LLONG_MAX, |
532 | default: MAXVAL(time_t, TYPE_BIT(time_t))) |
533 | : -1); |
534 | #else |
535 | static time_t const time_t_min = MINVAL(time_t, TYPE_BIT(time_t)); |
536 | static time_t const time_t_max = MAXVAL(time_t, TYPE_BIT(time_t)); |
537 | #endif |
538 | |
539 | /* |
540 | ** 302 / 1000 is log10(2.0) rounded up. |
541 | ** Subtract one for the sign bit if the type is signed; |
542 | ** add one for integer division truncation; |
543 | ** add one more for a minus sign if the type is signed. |
544 | */ |
545 | #define INT_STRLEN_MAXIMUM(type) \ |
546 | ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \ |
547 | 1 + TYPE_SIGNED(type)) |
548 | |
549 | /* |
550 | ** INITIALIZE(x) |
551 | */ |
552 | |
553 | #ifdef lint |
554 | # define INITIALIZE(x) ((x) = 0) |
555 | #else |
556 | # define INITIALIZE(x) |
557 | #endif |
558 | |
559 | #ifndef UNINIT_TRAP |
560 | # define UNINIT_TRAP 0 |
561 | #endif |
562 | |
563 | /* |
564 | ** For the benefit of GNU folk... |
565 | ** '_(MSGID)' uses the current locale's message library string for MSGID. |
566 | ** The default is to use gettext if available, and use MSGID otherwise. |
567 | */ |
568 | |
569 | #if HAVE_GETTEXT |
570 | #define _(msgid) gettext(msgid) |
571 | #else /* !HAVE_GETTEXT */ |
572 | #define _(msgid) msgid |
573 | #endif /* !HAVE_GETTEXT */ |
574 | |
575 | #if !defined TZ_DOMAIN && defined HAVE_GETTEXT |
576 | # define TZ_DOMAIN "tz" |
577 | #endif |
578 | |
579 | #if HAVE_INCOMPATIBLE_CTIME_R |
580 | #undef asctime_r |
581 | #undef ctime_r |
582 | char *asctime_r(struct tm const *, char *); |
583 | char *ctime_r(time_t const *, char *); |
584 | #endif /* HAVE_INCOMPATIBLE_CTIME_R */ |
585 | |
586 | /* Handy macros that are independent of tzfile implementation. */ |
587 | |
588 | #define YEARSPERREPEAT 400 /* years before a Gregorian repeat */ |
589 | |
590 | #define SECSPERMIN 60 |
591 | #define MINSPERHOUR 60 |
592 | #define HOURSPERDAY 24 |
593 | #define DAYSPERWEEK 7 |
594 | #define DAYSPERNYEAR 365 |
595 | #define DAYSPERLYEAR 366 |
596 | #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) |
597 | #define SECSPERDAY ((int_fast32_t) SECSPERHOUR * HOURSPERDAY) |
598 | #define MONSPERYEAR 12 |
599 | |
600 | #define TM_SUNDAY 0 |
601 | #define TM_MONDAY 1 |
602 | #define TM_TUESDAY 2 |
603 | #define TM_WEDNESDAY 3 |
604 | #define TM_THURSDAY 4 |
605 | #define TM_FRIDAY 5 |
606 | #define TM_SATURDAY 6 |
607 | |
608 | #define TM_JANUARY 0 |
609 | #define TM_FEBRUARY 1 |
610 | #define TM_MARCH 2 |
611 | #define TM_APRIL 3 |
612 | #define TM_MAY 4 |
613 | #define TM_JUNE 5 |
614 | #define TM_JULY 6 |
615 | #define TM_AUGUST 7 |
616 | #define TM_SEPTEMBER 8 |
617 | #define TM_OCTOBER 9 |
618 | #define TM_NOVEMBER 10 |
619 | #define TM_DECEMBER 11 |
620 | |
621 | #define TM_YEAR_BASE 1900 |
622 | |
623 | #define EPOCH_YEAR 1970 |
624 | #define EPOCH_WDAY TM_THURSDAY |
625 | |
626 | #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) |
627 | |
628 | /* |
629 | ** Since everything in isleap is modulo 400 (or a factor of 400), we know that |
630 | ** isleap(y) == isleap(y % 400) |
631 | ** and so |
632 | ** isleap(a + b) == isleap((a + b) % 400) |
633 | ** or |
634 | ** isleap(a + b) == isleap(a % 400 + b % 400) |
635 | ** This is true even if % means modulo rather than Fortran remainder |
636 | ** (which is allowed by C89 but not C99). |
637 | ** We use this to avoid addition overflow problems. |
638 | */ |
639 | |
640 | #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) |
641 | |
642 | |
643 | /* |
644 | ** The Gregorian year averages 365.2425 days, which is 31556952 seconds. |
645 | */ |
646 | |
647 | #define AVGSECSPERYEAR 31556952L |
648 | #define SECSPERREPEAT \ |
649 | ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR) |
650 | #define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */ |
651 | |
652 | #endif /* !defined PRIVATE_H */ |
653 | |