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
186typedef 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
191Please use a compiler that supports a 64-bit integer type (or wider);
192you may need to compile with "-DHAVE_STDINT_H".
193# endif
194typedef 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
210typedef long int_fast32_t;
211# define INT_FAST32_MAX LONG_MAX
212# define INT_FAST32_MIN LONG_MIN
213# else
214typedef 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
222typedef long long intmax_t;
223# define strtoimax strtoll
224# define INTMAX_MAX LLONG_MAX
225# define INTMAX_MIN LLONG_MIN
226# else
227typedef 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__
244typedef unsigned long long uint_fast64_t;
245# else
246# if ULONG_MAX >> 31 >> 1 < 0xffffffff
247Please use a compiler that supports a 64-bit integer type (or wider);
248you may need to compile with "-DHAVE_STDINT_H".
249# endif
250typedef unsigned long uint_fast64_t;
251# endif
252#endif
253
254#ifndef UINTMAX_MAX
255# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
256typedef unsigned long long uintmax_t;
257# else
258typedef 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
316static time_t sys_time(time_t *x) { return time(x); }
317# endif
318
319typedef 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
370char *ctime(time_t const *);
371char *ctime_r(time_t const *, char *);
372double difftime(time_t, time_t);
373struct tm *gmtime(time_t const *);
374struct tm *gmtime_r(time_t const *restrict, struct tm *restrict);
375struct tm *localtime(time_t const *);
376struct tm *localtime_r(time_t const *restrict, struct tm *restrict);
377time_t mktime(struct tm *);
378time_t time(time_t *);
379void 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
390extern char * asctime_r(struct tm const *restrict, char *restrict);
391#endif
392
393#ifdef USG_COMPAT
394# ifndef timezone
395extern long timezone;
396# endif
397# ifndef daylight
398extern int daylight;
399# endif
400#endif
401#if defined ALTZONE && !defined altzone
402extern 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
412void tzsetwall(void);
413# endif
414# if !defined offtime || defined time_tz
415struct tm *offtime(time_t const *, long);
416# endif
417# if !defined timegm || defined time_tz
418time_t timegm(struct tm *);
419# endif
420# if !defined timelocal || defined time_tz
421time_t timelocal(struct tm *);
422# endif
423# if !defined timeoff || defined time_tz
424time_t timeoff(struct tm *, long);
425# endif
426# if !defined time2posix || defined time_tz
427time_t time2posix(time_t);
428# endif
429# if !defined posix2time || defined time_tz
430time_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
456typedef struct state *timezone_t;
457struct tm *localtime_rz(timezone_t restrict, time_t const *restrict,
458 struct tm *restrict);
459time_t mktime_z(timezone_t restrict, struct tm *restrict);
460timezone_t tzalloc(char const *);
461void tzfree(timezone_t);
462# ifdef STD_INSPIRED
463# if !defined posix2time_z || defined time_tz
464time_t posix2time_z(timezone_t, time_t) ATTRIBUTE_PURE;
465# endif
466# if !defined time2posix_z || defined time_tz
467time_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. */
504static time_t const time_t_min = MINVAL(time_t, TYPE_BIT(time_t));
505static 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
554char *asctime_r(struct tm const *, char *);
555char *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