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 #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 INT_FAST64_MAX
 128 /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX.  */
 129 #if defined LLONG_MAX || defined __LONG_LONG_MAX__
 130 typedef long long       int_fast64_t;
 131 #else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
 132 #if (LONG_MAX >> 31) < 0xffffffff
 133 Please use a compiler that supports a 64-bit integer type (or wider);
 134 you may need to compile with "-DHAVE_STDINT_H".
 135 #endif /* (LONG_MAX >> 31) < 0xffffffff */
 136 typedef long            int_fast64_t;
 137 #endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
 138 #endif /* !defined INT_FAST64_MAX */
 139
 140 #ifndef INT32_MAX
 141 #define INT32_MAX 0x7fffffff
 142 #endif /* !defined INT32_MAX */
 143 #ifndef INT32_MIN
 144 #define INT32_MIN (-1 - INT32_MAX)
 145 #endif /* !defined INT32_MIN */
 146
 147 #if 2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)
 148 # define ATTRIBUTE_PURE __attribute__ ((__pure__))
 149 #else
 150 # define ATTRIBUTE_PURE /* empty */
 151 #endif
 152
 153 /*
 154 ** Workarounds for compilers/systems.
 155 */
 156
 157 /*
 158 ** Some time.h implementations don't declare asctime_r.
 159 ** Others might define it as a macro.
 160 ** Fix the former without affecting the latter.
 161 */
 162
 163 #ifndef asctime_r
 164 extern char *   asctime_r(struct tm const *, char *);
 165 #endif
 166
 167 /*
 168 ** Private function declarations.
 169 */
 170
 171 char *          icatalloc(char * old, const char * new);
 172 char *          icpyalloc(const char * string);
 173 const char *    scheck(const char * string, const char * format);
 174
 175 /*
 176 ** Finally, some convenience items.
 177 */
 178
 179 #ifndef TRUE
 180 #define TRUE    1
 181 #endif /* !defined TRUE */
 182
 183 #ifndef FALSE
 184 #define FALSE   0
 185 #endif /* !defined FALSE */
 186
 187 #ifndef TYPE_BIT
 188 #define TYPE_BIT(type)  (sizeof (type) * CHAR_BIT)
 189 #endif /* !defined TYPE_BIT */
 190
 191 #ifndef TYPE_SIGNED
 192 #define TYPE_SIGNED(type) (((type) -1) < 0)
 193 #endif /* !defined TYPE_SIGNED */
 194
 195 /*
 196 ** Since the definition of TYPE_INTEGRAL contains floating point numbers,
 197 ** it cannot be used in preprocessor directives.
 198 */
 199
 200 #ifndef TYPE_INTEGRAL
 201 #define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5)
 202 #endif /* !defined TYPE_INTEGRAL */
 203
 204 #ifndef INT_STRLEN_MAXIMUM
 205 /*
 206 ** 302 / 1000 is log10(2.0) rounded up.
 207 ** Subtract one for the sign bit if the type is signed;
 208 ** add one for integer division truncation;
 209 ** add one more for a minus sign if the type is signed.
 210 */
 211 #define INT_STRLEN_MAXIMUM(type) \
 212         ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
 213         1 + TYPE_SIGNED(type))
 214 #endif /* !defined INT_STRLEN_MAXIMUM */
 215
 216 /*
 217 ** INITIALIZE(x)
 218 */
 219
 220 #ifndef GNUC_or_lint
 221 #ifdef lint
 222 #define GNUC_or_lint
 223 #endif /* defined lint */
 224 #ifndef lint
 225 #ifdef __GNUC__
 226 #define GNUC_or_lint
 227 #endif /* defined __GNUC__ */
 228 #endif /* !defined lint */
 229 #endif /* !defined GNUC_or_lint */
 230
 231 #ifndef INITIALIZE
 232 #ifdef GNUC_or_lint
 233 #define INITIALIZE(x)   ((x) = 0)
 234 #endif /* defined GNUC_or_lint */
 235 #ifndef GNUC_or_lint
 236 #define INITIALIZE(x)
 237 #endif /* !defined GNUC_or_lint */
 238 #endif /* !defined INITIALIZE */
 239
 240 /*
 241 ** For the benefit of GNU folk...
 242 ** `_(MSGID)' uses the current locale's message library string for MSGID.
 243 ** The default is to use gettext if available, and use MSGID otherwise.
 244 */
 245
 246 #ifndef _
 247 #if HAVE_GETTEXT
 248 #define _(msgid) gettext(msgid)
 249 #else /* !HAVE_GETTEXT */
 250 #define _(msgid) msgid
 251 #endif /* !HAVE_GETTEXT */
 252 #endif /* !defined _ */
 253
 254 #ifndef TZ_DOMAIN
 255 #define TZ_DOMAIN "tz"
 256 #endif /* !defined TZ_DOMAIN */
 257
 258 #if HAVE_INCOMPATIBLE_CTIME_R
 259 #undef asctime_r
 260 #undef ctime_r
 261 char *asctime_r(struct tm const *, char *);
 262 char *ctime_r(time_t const *, char *);
 263 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
 264
 265 #ifndef YEARSPERREPEAT
 266 #define YEARSPERREPEAT          400     /* years before a Gregorian repeat */
 267 #endif /* !defined YEARSPERREPEAT */
 268
 269 /*
 270 ** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
 271 */
 272
 273 #ifndef AVGSECSPERYEAR
 274 #define AVGSECSPERYEAR          31556952L
 275 #endif /* !defined AVGSECSPERYEAR */
 276
 277 #ifndef SECSPERREPEAT
 278 #define SECSPERREPEAT           ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
 279 #endif /* !defined SECSPERREPEAT */
 280
 281 #ifndef SECSPERREPEAT_BITS
 282 #define SECSPERREPEAT_BITS      34      /* ceil(log2(SECSPERREPEAT)) */
 283 #endif /* !defined SECSPERREPEAT_BITS */
 284
 285 /*
 286 ** UNIX was a registered trademark of The Open Group in 2003.
 287 */
 288
 289 #endif /* !defined PRIVATE_H */