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