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_ADJTIME=0'.
23 */
24
25 #ifndef HAVE_ADJTIME
26 #define HAVE_ADJTIME 1
27 #endif /* !defined HAVE_ADJTIME */
28
29 #ifndef HAVE_GETTEXT
30 #define HAVE_GETTEXT 0
31 #endif /* !defined HAVE_GETTEXT */
32
33 #ifndef HAVE_INCOMPATIBLE_CTIME_R
34 #define HAVE_INCOMPATIBLE_CTIME_R 0
35 #endif /* !defined INCOMPATIBLE_CTIME_R */
36
37 #ifndef HAVE_LINK
38 #define HAVE_LINK 1
39 #endif /* !defined HAVE_LINK */
40
41 #ifndef HAVE_SETTIMEOFDAY
42 #define HAVE_SETTIMEOFDAY 3
43 #endif /* !defined HAVE_SETTIMEOFDAY */
44
45 #ifndef HAVE_SYMLINK
46 #define HAVE_SYMLINK 1
47 #endif /* !defined HAVE_SYMLINK */
48
49 #ifndef HAVE_SYS_STAT_H
50 #define HAVE_SYS_STAT_H 1
51 #endif /* !defined HAVE_SYS_STAT_H */
52
53 #ifndef HAVE_SYS_WAIT_H
54 #define HAVE_SYS_WAIT_H 1
55 #endif /* !defined HAVE_SYS_WAIT_H */
56
57 #ifndef HAVE_UNISTD_H
58 #define HAVE_UNISTD_H 1
59 #endif /* !defined HAVE_UNISTD_H */
60
61 #ifndef HAVE_UTMPX_H
62 #define HAVE_UTMPX_H 0
63 #endif /* !defined HAVE_UTMPX_H */
64
65 #ifndef LOCALE_HOME
66 #define LOCALE_HOME "/usr/lib/locale"
67 #endif /* !defined LOCALE_HOME */
68
69 #if HAVE_INCOMPATIBLE_CTIME_R
70 #define asctime_r _incompatible_asctime_r
71 #define ctime_r _incompatible_ctime_r
72 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
73
74 /*
75 ** Nested includes
76 */
77
78 #include "sys/types.h" /* for time_t */
79 #include "stdio.h"
80 #include "errno.h"
81 #include "string.h"
82 #include "limits.h" /* for CHAR_BIT et al. */
83 #include "time.h"
84 #include "stdlib.h"
85
86 #if HAVE_GETTEXT
87 #include "libintl.h"
88 #endif /* HAVE_GETTEXT */
89
90 #if HAVE_SYS_WAIT_H
91 #include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */
92 #endif /* HAVE_SYS_WAIT_H */
93
94 #ifndef WIFEXITED
95 #define WIFEXITED(status) (((status) & 0xff) == 0)
96 #endif /* !defined WIFEXITED */
97 #ifndef WEXITSTATUS
98 #define WEXITSTATUS(status) (((status) >> 8) & 0xff)
99 #endif /* !defined WEXITSTATUS */
100
101 #if HAVE_UNISTD_H
102 #include "unistd.h" /* for F_OK, R_OK, and other POSIX goodness */
103 #endif /* HAVE_UNISTD_H */
104
105 #ifndef F_OK
106 #define F_OK 0
107 #endif /* !defined F_OK */
108 #ifndef R_OK
109 #define R_OK 4
110 #endif /* !defined R_OK */
111
112 /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
113 #define is_digit(c) ((unsigned)(c) - '0' <= 9)
114
115 /*
116 ** Define HAVE_STDINT_H's default value here, rather than at the
117 ** start, since __GLIBC__'s value depends on previously-included
118 ** files.
119 ** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
120 */
121 #ifndef HAVE_STDINT_H
122 #define HAVE_STDINT_H \
123 (199901 <= __STDC_VERSION__ || \
124 2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
125 #endif /* !defined HAVE_STDINT_H */
126
127 #if HAVE_STDINT_H
128 #include "stdint.h"
129 #endif /* !HAVE_STDINT_H */
130
131 #ifndef HAVE_INTTYPES_H
132 # define HAVE_INTTYPES_H HAVE_STDINT_H
133 #endif
134 #if HAVE_INTTYPES_H
135 # include <inttypes.h>
136 #endif
137
138 #ifndef INT_FAST64_MAX
139 /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */
140 #if defined LLONG_MAX || defined __LONG_LONG_MAX__
141 typedef long long int_fast64_t;
142 # ifdef LLONG_MAX
143 # define INT_FAST64_MIN LLONG_MIN
144 # define INT_FAST64_MAX LLONG_MAX
145 # else
146 # define INT_FAST64_MIN __LONG_LONG_MIN__
147 # define INT_FAST64_MAX __LONG_LONG_MAX__
148 # endif
149 # define SCNdFAST64 "lld"
150 #else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
151 #if (LONG_MAX >> 31) < 0xffffffff
152 Please use a compiler that supports a 64-bit integer type (or wider);
153 you may need to compile with "-DHAVE_STDINT_H".
154 #endif /* (LONG_MAX >> 31) < 0xffffffff */
155 typedef long int_fast64_t;
156 # define INT_FAST64_MIN LONG_MIN
157 # define INT_FAST64_MAX LONG_MAX
158 # define SCNdFAST64 "ld"
159 #endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
160 #endif /* !defined INT_FAST64_MAX */
161
162 #ifndef INT_FAST32_MAX
163 # if INT_MAX >> 31 == 0
164 typedef long int_fast32_t;
165 # else
166 typedef int int_fast32_t;
167 # endif
168 #endif
169
170 #ifndef INTMAX_MAX
171 # if defined LLONG_MAX || defined __LONG_LONG_MAX__
172 typedef long long intmax_t;
173 # define strtoimax strtoll
174 # define PRIdMAX "lld"
175 # ifdef LLONG_MAX
176 # define INTMAX_MAX LLONG_MAX
177 # define INTMAX_MIN LLONG_MIN
178 # else
179 # define INTMAX_MAX __LONG_LONG_MAX__
180 # define INTMAX_MIN __LONG_LONG_MIN__
181 # endif
182 # else
183 typedef long intmax_t;
184 # define strtoimax strtol
185 # define PRIdMAX "ld"
186 # define INTMAX_MAX LONG_MAX
187 # define INTMAX_MIN LONG_MIN
188 # endif
189 #endif
190
191 #ifndef UINTMAX_MAX
192 # if defined ULLONG_MAX || defined __LONG_LONG_MAX__
193 typedef unsigned long long uintmax_t;
194 # define PRIuMAX "llu"
195 # else
196 typedef unsigned long uintmax_t;
197 # define PRIuMAX "lu"
198 # endif
199 #endif
200
201 #ifndef INT32_MAX
202 #define INT32_MAX 0x7fffffff
203 #endif /* !defined INT32_MAX */
204 #ifndef INT32_MIN
205 #define INT32_MIN (-1 - INT32_MAX)
206 #endif /* !defined INT32_MIN */
207
208 #ifndef SIZE_MAX
209 #define SIZE_MAX ((size_t) -1)
210 #endif
211
212 #if 2 < __GNUC__ + (96 <= __GNUC_MINOR__)
213 # define ATTRIBUTE_CONST __attribute__ ((const))
214 # define ATTRIBUTE_PURE __attribute__ ((__pure__))
215 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
216 #else
217 # define ATTRIBUTE_CONST /* empty */
218 # define ATTRIBUTE_PURE /* empty */
219 # define ATTRIBUTE_FORMAT(spec) /* empty */
220 #endif
221
222 #if !defined _Noreturn && __STDC_VERSION__ < 201112
223 # if 2 < __GNUC__ + (8 <= __GNUC_MINOR__)
224 # define _Noreturn __attribute__ ((__noreturn__))
225 # else
226 # define _Noreturn
227 # endif
228 #endif
229
230 #if __STDC_VERSION__ < 199901 && !defined restrict
231 # define restrict /* empty */
232 #endif
233
234 /*
235 ** Workarounds for compilers/systems.
236 */
237
238 /*
239 ** Some time.h implementations don't declare asctime_r.
240 ** Others might define it as a macro.
241 ** Fix the former without affecting the latter.
242 */
243
244 #ifndef asctime_r
245 extern char * asctime_r(struct tm const *, char *);
246 #endif
247
248 /*
249 ** Compile with -Dtime_tz=T to build the tz package with a private
250 ** time_t type equivalent to T rather than the system-supplied time_t.
251 ** This debugging feature can test unusual design decisions
252 ** (e.g., time_t wider than 'long', or unsigned time_t) even on
253 ** typical platforms.
254 */
255 #ifdef time_tz
sys_time(time_t * x)256 static time_t sys_time(time_t *x) { return time(x); }
257
258 # undef ctime
259 # define ctime tz_ctime
260 # undef ctime_r
261 # define ctime_r tz_ctime_r
262 # undef difftime
263 # define difftime tz_difftime
264 # undef gmtime
265 # define gmtime tz_gmtime
266 # undef gmtime_r
267 # define gmtime_r tz_gmtime_r
268 # undef localtime
269 # define localtime tz_localtime
270 # undef localtime_r
271 # define localtime_r tz_localtime_r
272 # undef mktime
273 # define mktime tz_mktime
274 # undef time
275 # define time tz_time
276 # undef time_t
277 # define time_t tz_time_t
278
279 typedef time_tz time_t;
280
281 char *ctime(time_t const *);
282 char *ctime_r(time_t const *, char *);
283 double difftime(time_t, time_t);
284 struct tm *gmtime(time_t const *);
285 struct tm *gmtime_r(time_t const *restrict, struct tm *restrict);
286 struct tm *localtime(time_t const *);
287 struct tm *localtime_r(time_t const *restrict, struct tm *restrict);
288 time_t mktime(struct tm *);
289
290 static time_t
time(time_t * p)291 time(time_t *p)
292 {
293 time_t r = sys_time(0);
294 if (p)
295 *p = r;
296 return r;
297 }
298 #endif
299
300 /*
301 ** Private function declarations.
302 */
303
304 char * icatalloc(char * old, const char * new);
305 char * icpyalloc(const char * string);
306 const char * scheck(const char * string, const char * format);
307
308 /*
309 ** Finally, some convenience items.
310 */
311
312 #ifndef TRUE
313 #define TRUE 1
314 #endif /* !defined TRUE */
315
316 #ifndef FALSE
317 #define FALSE 0
318 #endif /* !defined FALSE */
319
320 #ifndef TYPE_BIT
321 #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
322 #endif /* !defined TYPE_BIT */
323
324 #ifndef TYPE_SIGNED
325 #define TYPE_SIGNED(type) (((type) -1) < 0)
326 #endif /* !defined TYPE_SIGNED */
327
328 /* The minimum and maximum finite time values. */
329 static time_t const time_t_min =
330 (TYPE_SIGNED(time_t)
331 ? (time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1)
332 : 0);
333 static time_t const time_t_max =
334 (TYPE_SIGNED(time_t)
335 ? - (~ 0 < 0) - ((time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1))
336 : -1);
337
338 #ifndef INT_STRLEN_MAXIMUM
339 /*
340 ** 302 / 1000 is log10(2.0) rounded up.
341 ** Subtract one for the sign bit if the type is signed;
342 ** add one for integer division truncation;
343 ** add one more for a minus sign if the type is signed.
344 */
345 #define INT_STRLEN_MAXIMUM(type) \
346 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
347 1 + TYPE_SIGNED(type))
348 #endif /* !defined INT_STRLEN_MAXIMUM */
349
350 /*
351 ** INITIALIZE(x)
352 */
353
354 #ifndef GNUC_or_lint
355 #ifdef lint
356 #define GNUC_or_lint
357 #endif /* defined lint */
358 #ifndef lint
359 #ifdef __GNUC__
360 #define GNUC_or_lint
361 #endif /* defined __GNUC__ */
362 #endif /* !defined lint */
363 #endif /* !defined GNUC_or_lint */
364
365 #ifndef INITIALIZE
366 #ifdef GNUC_or_lint
367 #define INITIALIZE(x) ((x) = 0)
368 #endif /* defined GNUC_or_lint */
369 #ifndef GNUC_or_lint
370 #define INITIALIZE(x)
371 #endif /* !defined GNUC_or_lint */
372 #endif /* !defined INITIALIZE */
373
374 /*
375 ** For the benefit of GNU folk...
376 ** `_(MSGID)' uses the current locale's message library string for MSGID.
377 ** The default is to use gettext if available, and use MSGID otherwise.
378 */
379
380 #ifndef _
381 #if HAVE_GETTEXT
382 #define _(msgid) gettext(msgid)
383 #else /* !HAVE_GETTEXT */
384 #define _(msgid) msgid
385 #endif /* !HAVE_GETTEXT */
386 #endif /* !defined _ */
387
388 #ifndef TZ_DOMAIN
389 #define TZ_DOMAIN "tz"
390 #endif /* !defined TZ_DOMAIN */
391
392 #if HAVE_INCOMPATIBLE_CTIME_R
393 #undef asctime_r
394 #undef ctime_r
395 char *asctime_r(struct tm const *, char *);
396 char *ctime_r(time_t const *, char *);
397 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
398
399 #ifndef YEARSPERREPEAT
400 #define YEARSPERREPEAT 400 /* years before a Gregorian repeat */
401 #endif /* !defined YEARSPERREPEAT */
402
403 /*
404 ** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
405 */
406
407 #ifndef AVGSECSPERYEAR
408 #define AVGSECSPERYEAR 31556952L
409 #endif /* !defined AVGSECSPERYEAR */
410
411 #ifndef SECSPERREPEAT
412 #define SECSPERREPEAT ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
413 #endif /* !defined SECSPERREPEAT */
414
415 #ifndef SECSPERREPEAT_BITS
416 #define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */
417 #endif /* !defined SECSPERREPEAT_BITS */
418
419 /*
420 ** UNIX was a registered trademark of The Open Group in 2003.
421 */
422
423 #endif /* !defined PRIVATE_H */
424