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_SETTIMEOFDAY
38 #define HAVE_SETTIMEOFDAY 3
39 #endif /* !defined HAVE_SETTIMEOFDAY */
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 0
59 #endif /* !defined HAVE_UTMPX_H */
60
61 #ifndef LOCALE_HOME
62 #define LOCALE_HOME "/usr/lib/locale"
63 #endif /* !defined LOCALE_HOME */
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 /*
71 ** Nested includes
72 */
73
74 #include "sys/types.h" /* for time_t */
75 #include "stdio.h"
76 #include "errno.h"
77 #include "string.h"
78 #include "limits.h" /* for CHAR_BIT et al. */
79 #include "time.h"
80 #include "stdlib.h"
81
82 #if HAVE_GETTEXT
83 #include "libintl.h"
84 #endif /* HAVE_GETTEXT */
85
86 #if HAVE_SYS_WAIT_H
87 #include <sys/wait.h> /* for WIFEXITED and WEXITSTATUS */
88 #endif /* HAVE_SYS_WAIT_H */
89
90 #ifndef WIFEXITED
91 #define WIFEXITED(status) (((status) & 0xff) == 0)
92 #endif /* !defined WIFEXITED */
93 #ifndef WEXITSTATUS
94 #define WEXITSTATUS(status) (((status) >> 8) & 0xff)
95 #endif /* !defined WEXITSTATUS */
96
97 #if HAVE_UNISTD_H
98 #include "unistd.h" /* for F_OK, R_OK, and other POSIX goodness */
99 #endif /* HAVE_UNISTD_H */
100
101 #ifndef F_OK
102 #define F_OK 0
103 #endif /* !defined F_OK */
104 #ifndef R_OK
105 #define R_OK 4
106 #endif /* !defined R_OK */
107
108 /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
109 #define is_digit(c) ((unsigned)(c) - '0' <= 9)
110
111 /*
112 ** Define HAVE_STDINT_H's default value here, rather than at the
113 ** start, since __GLIBC__'s value depends on previously-included
114 ** files.
115 ** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
116 */
117 #ifndef HAVE_STDINT_H
118 #define HAVE_STDINT_H \
119 (199901 <= __STDC_VERSION__ || \
120 2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
121 #endif /* !defined HAVE_STDINT_H */
122
123 #if HAVE_STDINT_H
124 #include "stdint.h"
125 #endif /* !HAVE_STDINT_H */
126
127 #ifndef HAVE_INTTYPES_H
128 # define HAVE_INTTYPES_H HAVE_STDINT_H
129 #endif
130 #if HAVE_INTTYPES_H
131 # include <inttypes.h>
132 #endif
133
134 #ifndef INT_FAST64_MAX
135 /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX. */
136 #if defined LLONG_MAX || defined __LONG_LONG_MAX__
137 typedef long long int_fast64_t;
138 # ifdef LLONG_MAX
139 # define INT_FAST64_MIN LLONG_MIN
140 # define INT_FAST64_MAX LLONG_MAX
141 # else
142 # define INT_FAST64_MIN __LONG_LONG_MIN__
143 # define INT_FAST64_MAX __LONG_LONG_MAX__
144 # endif
145 # define SCNdFAST64 "lld"
146 #else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
147 #if (LONG_MAX >> 31) < 0xffffffff
148 Please use a compiler that supports a 64-bit integer type (or wider);
149 you may need to compile with "-DHAVE_STDINT_H".
150 #endif /* (LONG_MAX >> 31) < 0xffffffff */
151 typedef long int_fast64_t;
152 # define INT_FAST64_MIN LONG_MIN
153 # define INT_FAST64_MAX LONG_MAX
154 # define SCNdFAST64 "ld"
155 #endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
156 #endif /* !defined INT_FAST64_MAX */
157
158 #ifndef INT_FAST32_MAX
159 # if INT_MAX >> 31 == 0
160 typedef long int_fast32_t;
161 # else
162 typedef int int_fast32_t;
163 # endif
164 #endif
165
166 #ifndef INTMAX_MAX
167 # if defined LLONG_MAX || defined __LONG_LONG_MAX__
168 typedef long long intmax_t;
169 # define PRIdMAX "lld"
170 # else
171 typedef long intmax_t;
172 # define PRIdMAX "ld"
173 # endif
174 #endif
175
176 #ifndef UINTMAX_MAX
177 # if defined ULLONG_MAX || defined __LONG_LONG_MAX__
178 typedef unsigned long long uintmax_t;
179 # define PRIuMAX "llu"
180 # else
181 typedef unsigned long uintmax_t;
182 # define PRIuMAX "lu"
183 # endif
184 #endif
185
186 #ifndef INT32_MAX
187 #define INT32_MAX 0x7fffffff
188 #endif /* !defined INT32_MAX */
189 #ifndef INT32_MIN
190 #define INT32_MIN (-1 - INT32_MAX)
191 #endif /* !defined INT32_MIN */
192
193 #if 2 < __GNUC__ + (96 <= __GNUC_MINOR__)
194 # define ATTRIBUTE_CONST __attribute__ ((const))
195 # define ATTRIBUTE_PURE __attribute__ ((__pure__))
196 #else
197 # define ATTRIBUTE_CONST /* empty */
198 # define ATTRIBUTE_PURE /* empty */
199 #endif
200
201 #if !defined _Noreturn && __STDC_VERSION__ < 201112
202 # if 2 < __GNUC__ + (8 <= __GNUC_MINOR__)
203 # define _Noreturn __attribute__ ((__noreturn__))
204 # else
205 # define _Noreturn
206 # endif
207 #endif
208
209 #if __STDC_VERSION__ < 199901 && !defined restrict
210 # define restrict /* empty */
211 #endif
212
213 /*
214 ** Workarounds for compilers/systems.
215 */
216
217 /*
218 ** Some time.h implementations don't declare asctime_r.
219 ** Others might define it as a macro.
220 ** Fix the former without affecting the latter.
221 */
222
223 #ifndef asctime_r
224 extern char * asctime_r(struct tm const *, char *);
225 #endif
226
227 /*
228 ** Compile with -Dtime_tz=T to build the tz package with a private
229 ** time_t type equivalent to T rather than the system-supplied time_t.
230 ** This debugging feature can test unusual design decisions
231 ** (e.g., time_t wider than 'long', or unsigned time_t) even on
232 ** typical platforms.
233 */
234 #ifdef time_tz
sys_time(time_t * x)235 static time_t sys_time(time_t *x) { return time(x); }
236
237 # undef ctime
238 # define ctime tz_ctime
239 # undef ctime_r
240 # define ctime_r tz_ctime_r
241 # undef difftime
242 # define difftime tz_difftime
243 # undef gmtime
244 # define gmtime tz_gmtime
245 # undef gmtime_r
246 # define gmtime_r tz_gmtime_r
247 # undef localtime
248 # define localtime tz_localtime
249 # undef localtime_r
250 # define localtime_r tz_localtime_r
251 # undef mktime
252 # define mktime tz_mktime
253 # undef time
254 # define time tz_time
255 # undef time_t
256 # define time_t tz_time_t
257
258 typedef time_tz time_t;
259
260 char *ctime(time_t const *);
261 char *ctime_r(time_t const *, char *);
262 double difftime(time_t, time_t);
263 struct tm *gmtime(time_t const *);
264 struct tm *gmtime_r(time_t const *restrict, struct tm *restrict);
265 struct tm *localtime(time_t const *);
266 struct tm *localtime_r(time_t const *restrict, struct tm *restrict);
267 time_t mktime(struct tm *);
268
269 static time_t
time(time_t * p)270 time(time_t *p)
271 {
272 time_t r = sys_time(0);
273 if (p)
274 *p = r;
275 return r;
276 }
277 #endif
278
279 /*
280 ** Private function declarations.
281 */
282
283 char * icatalloc(char * old, const char * new);
284 char * icpyalloc(const char * string);
285 const char * scheck(const char * string, const char * format);
286
287 /*
288 ** Finally, some convenience items.
289 */
290
291 #ifndef TRUE
292 #define TRUE 1
293 #endif /* !defined TRUE */
294
295 #ifndef FALSE
296 #define FALSE 0
297 #endif /* !defined FALSE */
298
299 #ifndef TYPE_BIT
300 #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
301 #endif /* !defined TYPE_BIT */
302
303 #ifndef TYPE_SIGNED
304 #define TYPE_SIGNED(type) (((type) -1) < 0)
305 #endif /* !defined TYPE_SIGNED */
306
307 /* The minimum and maximum finite time values. */
308 static time_t const time_t_min =
309 (TYPE_SIGNED(time_t)
310 ? (time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1)
311 : 0);
312 static time_t const time_t_max =
313 (TYPE_SIGNED(time_t)
314 ? - (~ 0 < 0) - ((time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1))
315 : -1);
316
317 /*
318 ** Since the definition of TYPE_INTEGRAL contains floating point numbers,
319 ** it cannot be used in preprocessor directives.
320 */
321
322 #ifndef TYPE_INTEGRAL
323 #define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5)
324 #endif /* !defined TYPE_INTEGRAL */
325
326 #ifndef INT_STRLEN_MAXIMUM
327 /*
328 ** 302 / 1000 is log10(2.0) rounded up.
329 ** Subtract one for the sign bit if the type is signed;
330 ** add one for integer division truncation;
331 ** add one more for a minus sign if the type is signed.
332 */
333 #define INT_STRLEN_MAXIMUM(type) \
334 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
335 1 + TYPE_SIGNED(type))
336 #endif /* !defined INT_STRLEN_MAXIMUM */
337
338 /*
339 ** INITIALIZE(x)
340 */
341
342 #ifndef GNUC_or_lint
343 #ifdef lint
344 #define GNUC_or_lint
345 #endif /* defined lint */
346 #ifndef lint
347 #ifdef __GNUC__
348 #define GNUC_or_lint
349 #endif /* defined __GNUC__ */
350 #endif /* !defined lint */
351 #endif /* !defined GNUC_or_lint */
352
353 #ifndef INITIALIZE
354 #ifdef GNUC_or_lint
355 #define INITIALIZE(x) ((x) = 0)
356 #endif /* defined GNUC_or_lint */
357 #ifndef GNUC_or_lint
358 #define INITIALIZE(x)
359 #endif /* !defined GNUC_or_lint */
360 #endif /* !defined INITIALIZE */
361
362 /*
363 ** For the benefit of GNU folk...
364 ** `_(MSGID)' uses the current locale's message library string for MSGID.
365 ** The default is to use gettext if available, and use MSGID otherwise.
366 */
367
368 #ifndef _
369 #if HAVE_GETTEXT
370 #define _(msgid) gettext(msgid)
371 #else /* !HAVE_GETTEXT */
372 #define _(msgid) msgid
373 #endif /* !HAVE_GETTEXT */
374 #endif /* !defined _ */
375
376 #ifndef TZ_DOMAIN
377 #define TZ_DOMAIN "tz"
378 #endif /* !defined TZ_DOMAIN */
379
380 #if HAVE_INCOMPATIBLE_CTIME_R
381 #undef asctime_r
382 #undef ctime_r
383 char *asctime_r(struct tm const *, char *);
384 char *ctime_r(time_t const *, char *);
385 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
386
387 #ifndef YEARSPERREPEAT
388 #define YEARSPERREPEAT 400 /* years before a Gregorian repeat */
389 #endif /* !defined YEARSPERREPEAT */
390
391 /*
392 ** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
393 */
394
395 #ifndef AVGSECSPERYEAR
396 #define AVGSECSPERYEAR 31556952L
397 #endif /* !defined AVGSECSPERYEAR */
398
399 #ifndef SECSPERREPEAT
400 #define SECSPERREPEAT ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
401 #endif /* !defined SECSPERREPEAT */
402
403 #ifndef SECSPERREPEAT_BITS
404 #define SECSPERREPEAT_BITS 34 /* ceil(log2(SECSPERREPEAT)) */
405 #endif /* !defined SECSPERREPEAT_BITS */
406
407 /*
408 ** UNIX was a registered trademark of The Open Group in 2003.
409 */
410
411 #endif /* !defined PRIVATE_H */
412