timezone/private.h

   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 /*
  19 ** ID
  20 */
  21
  22 #ifndef lint
  23 #ifndef NOID
  24 static char     privatehid[] = "@(#)private.h   8.6";
  25 #endif /* !defined NOID */
  26 #endif /* !defined lint */
  27
  28 #define GRANDPARENTED   "Local time zone must be set--see zic manual page"
  29
  30 /*
  31 ** Defaults for preprocessor symbols.
  32 ** You can override these in your C compiler options, e.g. `-DHAVE_ADJTIME=0'.
  33 */
  34
  35 #ifndef HAVE_ADJTIME
  36 #define HAVE_ADJTIME            1
  37 #endif /* !defined HAVE_ADJTIME */
  38
  39 #ifndef HAVE_GETTEXT
  40 #define HAVE_GETTEXT            0
  41 #endif /* !defined HAVE_GETTEXT */
  42
  43 #ifndef HAVE_INCOMPATIBLE_CTIME_R
  44 #define HAVE_INCOMPATIBLE_CTIME_R       0
  45 #endif /* !defined INCOMPATIBLE_CTIME_R */
  46
  47 #ifndef HAVE_SETTIMEOFDAY
  48 #define HAVE_SETTIMEOFDAY       3
  49 #endif /* !defined HAVE_SETTIMEOFDAY */
  50
  51 #ifndef HAVE_SYMLINK
  52 #define HAVE_SYMLINK            1
  53 #endif /* !defined HAVE_SYMLINK */
  54
  55 #ifndef HAVE_SYS_STAT_H
  56 #define HAVE_SYS_STAT_H         1
  57 #endif /* !defined HAVE_SYS_STAT_H */
  58
  59 #ifndef HAVE_SYS_WAIT_H
  60 #define HAVE_SYS_WAIT_H         1
  61 #endif /* !defined HAVE_SYS_WAIT_H */
  62
  63 #ifndef HAVE_UNISTD_H
  64 #define HAVE_UNISTD_H           1
  65 #endif /* !defined HAVE_UNISTD_H */
  66
  67 #ifndef HAVE_UTMPX_H
  68 #define HAVE_UTMPX_H            0
  69 #endif /* !defined HAVE_UTMPX_H */
  70
  71 #ifndef LOCALE_HOME
  72 #define LOCALE_HOME             "/usr/lib/locale"
  73 #endif /* !defined LOCALE_HOME */
  74
  75 #if HAVE_INCOMPATIBLE_CTIME_R
  76 #define asctime_r _incompatible_asctime_r
  77 #define ctime_r _incompatible_ctime_r
  78 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
  79
  80 /*
  81 ** Nested includes
  82 */
  83
  84 #include "sys/types.h"  /* for time_t */
  85 #include "stdio.h"
  86 #include "errno.h"
  87 #include "string.h"
  88 #include "limits.h"     /* for CHAR_BIT et al. */
  89 #include "time.h"
  90 #include "stdlib.h"
  91
  92 #if HAVE_GETTEXT
  93 #include "libintl.h"
  94 #endif /* HAVE_GETTEXT */
  95
  96 #if HAVE_SYS_WAIT_H
  97 #include <sys/wait.h>   /* for WIFEXITED and WEXITSTATUS */
  98 #endif /* HAVE_SYS_WAIT_H */
  99
 100 #ifndef WIFEXITED
 101 #define WIFEXITED(status)       (((status) & 0xff) == 0)
 102 #endif /* !defined WIFEXITED */
 103 #ifndef WEXITSTATUS
 104 #define WEXITSTATUS(status)     (((status) >> 8) & 0xff)
 105 #endif /* !defined WEXITSTATUS */
 106
 107 #if HAVE_UNISTD_H
 108 #include "unistd.h"     /* for F_OK, R_OK, and other POSIX goodness */
 109 #endif /* HAVE_UNISTD_H */
 110
 111 #ifndef F_OK
 112 #define F_OK    0
 113 #endif /* !defined F_OK */
 114 #ifndef R_OK
 115 #define R_OK    4
 116 #endif /* !defined R_OK */
 117
 118 /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
 119 #define is_digit(c) ((unsigned)(c) - '0' <= 9)
 120
 121 /*
 122 ** Define HAVE_STDINT_H's default value here, rather than at the
 123 ** start, since __GLIBC__'s value depends on previously-included
 124 ** files.
 125 ** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
 126 */
 127 #ifndef HAVE_STDINT_H
 128 #define HAVE_STDINT_H \
 129         (199901 <= __STDC_VERSION__ || \
 130         2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
 131 #endif /* !defined HAVE_STDINT_H */
 132
 133 #if HAVE_STDINT_H
 134 #include "stdint.h"
 135 #endif /* !HAVE_STDINT_H */
 136
 137 #ifndef INT_FAST64_MAX
 138 /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX.  */
 139 #if defined LLONG_MAX || defined __LONG_LONG_MAX__
 140 typedef long long       int_fast64_t;
 141 #else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
 142 #if (LONG_MAX >> 31) < 0xffffffff
 143 Please use a compiler that supports a 64-bit integer type (or wider);
 144 you may need to compile with "-DHAVE_STDINT_H".
 145 #endif /* (LONG_MAX >> 31) < 0xffffffff */
 146 typedef long            int_fast64_t;
 147 #endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
 148 #endif /* !defined INT_FAST64_MAX */
 149
 150 #ifndef INT32_MAX
 151 #define INT32_MAX 0x7fffffff
 152 #endif /* !defined INT32_MAX */
 153 #ifndef INT32_MIN
 154 #define INT32_MIN (-1 - INT32_MAX)
 155 #endif /* !defined INT32_MIN */
 156
 157 /*
 158 ** Workarounds for compilers/systems.
 159 */
 160
 161 /*
 162 ** Some time.h implementations don't declare asctime_r.
 163 ** Others might define it as a macro.
 164 ** Fix the former without affecting the latter.
 165 */
 166
 167 #ifndef asctime_r
 168 extern char *   asctime_r(struct tm const *, char *);
 169 #endif
 170
 171 /*
 172 ** Private function declarations.
 173 */
 174
 175 char *          icalloc(int nelem, int elsize);
 176 char *          icatalloc(char * old, const char * new);
 177 char *          icpyalloc(const char * string);
 178 char *          imalloc(int n);
 179 void *          irealloc(void * pointer, int size);
 180 void            icfree(char * pointer);
 181 void            ifree(char * pointer);
 182 const char *    scheck(const char * string, const char * format);
 183
 184 /*
 185 ** Finally, some convenience items.
 186 */
 187
 188 #ifndef TRUE
 189 #define TRUE    1
 190 #endif /* !defined TRUE */
 191
 192 #ifndef FALSE
 193 #define FALSE   0
 194 #endif /* !defined FALSE */
 195
 196 #ifndef TYPE_BIT
 197 #define TYPE_BIT(type)  (sizeof (type) * CHAR_BIT)
 198 #endif /* !defined TYPE_BIT */
 199
 200 #ifndef TYPE_SIGNED
 201 #define TYPE_SIGNED(type) (((type) -1) < 0)
 202 #endif /* !defined TYPE_SIGNED */
 203
 204 /*
 205 ** Since the definition of TYPE_INTEGRAL contains floating point numbers,
 206 ** it cannot be used in preprocessor directives.
 207 */
 208
 209 #ifndef TYPE_INTEGRAL
 210 #define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5)
 211 #endif /* !defined TYPE_INTEGRAL */
 212
 213 #ifndef INT_STRLEN_MAXIMUM
 214 /*
 215 ** 302 / 1000 is log10(2.0) rounded up.
 216 ** Subtract one for the sign bit if the type is signed;
 217 ** add one for integer division truncation;
 218 ** add one more for a minus sign if the type is signed.
 219 */
 220 #define INT_STRLEN_MAXIMUM(type) \
 221         ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
 222         1 + TYPE_SIGNED(type))
 223 #endif /* !defined INT_STRLEN_MAXIMUM */
 224
 225 /*
 226 ** INITIALIZE(x)
 227 */
 228
 229 #ifndef GNUC_or_lint
 230 #ifdef lint
 231 #define GNUC_or_lint
 232 #endif /* defined lint */
 233 #ifndef lint
 234 #ifdef __GNUC__
 235 #define GNUC_or_lint
 236 #endif /* defined __GNUC__ */
 237 #endif /* !defined lint */
 238 #endif /* !defined GNUC_or_lint */
 239
 240 #ifndef INITIALIZE
 241 #ifdef GNUC_or_lint
 242 #define INITIALIZE(x)   ((x) = 0)
 243 #endif /* defined GNUC_or_lint */
 244 #ifndef GNUC_or_lint
 245 #define INITIALIZE(x)
 246 #endif /* !defined GNUC_or_lint */
 247 #endif /* !defined INITIALIZE */
 248
 249 /*
 250 ** For the benefit of GNU folk...
 251 ** `_(MSGID)' uses the current locale's message library string for MSGID.
 252 ** The default is to use gettext if available, and use MSGID otherwise.
 253 */
 254
 255 #ifndef _
 256 #if HAVE_GETTEXT
 257 #define _(msgid) gettext(msgid)
 258 #else /* !HAVE_GETTEXT */
 259 #define _(msgid) msgid
 260 #endif /* !HAVE_GETTEXT */
 261 #endif /* !defined _ */
 262
 263 #ifndef TZ_DOMAIN
 264 #define TZ_DOMAIN "tz"
 265 #endif /* !defined TZ_DOMAIN */
 266
 267 #if HAVE_INCOMPATIBLE_CTIME_R
 268 #undef asctime_r
 269 #undef ctime_r
 270 char *asctime_r(struct tm const *, char *);
 271 char *ctime_r(time_t const *, char *);
 272 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
 273
 274 #ifndef YEARSPERREPEAT
 275 #define YEARSPERREPEAT          400     /* years before a Gregorian repeat */
 276 #endif /* !defined YEARSPERREPEAT */
 277
 278 /*
 279 ** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
 280 */
 281
 282 #ifndef AVGSECSPERYEAR
 283 #define AVGSECSPERYEAR          31556952L
 284 #endif /* !defined AVGSECSPERYEAR */
 285
 286 #ifndef SECSPERREPEAT
 287 #define SECSPERREPEAT           ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
 288 #endif /* !defined SECSPERREPEAT */
 289
 290 #ifndef SECSPERREPEAT_BITS
 291 #define SECSPERREPEAT_BITS      34      /* ceil(log2(SECSPERREPEAT)) */
 292 #endif /* !defined SECSPERREPEAT_BITS */
 293
 294 /*
 295 ** UNIX was a registered trademark of The Open Group in 2003.
 296 */
 297
 298 #endif /* !defined PRIVATE_H */