lib/libc/time/private.h

   1 /*      $NetBSD: private.h,v 1.26 2012/08/09 12:38:25 christos Exp $    */
   2
   3 #ifndef PRIVATE_H
   4 #define PRIVATE_H
   5
   6 /* NetBSD defaults */
   7 #define TM_GMTOFF       tm_gmtoff
   8 #define TM_ZONE         tm_zone
   9 #define STD_INSPIRED    1
  10 #define HAVE_LONG_DOUBLE 1
  11
  12 /* For when we build zic as a host tool. */
  13 #if HAVE_NBTOOL_CONFIG_H
  14 #include "nbtool_config.h"
  15 #endif
  16
  17 /*
  18 ** This file is in the public domain, so clarified as of
  19 ** 1996-06-05 by Arthur David Olson.
  20 */
  21
  22 /*
  23 ** This header is for use ONLY with the time conversion code.
  24 ** There is no guarantee that it will remain unchanged,
  25 ** or that it will remain at all.
  26 ** Do NOT copy it to any system include directory.
  27 ** Thank you!
  28 */
  29
  30 #define GRANDPARENTED   "Local time zone must be set--see zic manual page"
  31
  32 /*
  33 ** Defaults for preprocessor symbols.
  34 ** You can override these in your C compiler options, e.g. `-DHAVE_ADJTIME=0'.
  35 */
  36
  37 #ifndef HAVE_ADJTIME
  38 #define HAVE_ADJTIME            1
  39 #endif /* !defined HAVE_ADJTIME */
  40
  41 #ifndef HAVE_GETTEXT
  42 #define HAVE_GETTEXT            0
  43 #endif /* !defined HAVE_GETTEXT */
  44
  45 #ifndef HAVE_INCOMPATIBLE_CTIME_R
  46 #define HAVE_INCOMPATIBLE_CTIME_R       0
  47 #endif /* !defined INCOMPATIBLE_CTIME_R */
  48
  49 #ifndef HAVE_SETTIMEOFDAY
  50 #define HAVE_SETTIMEOFDAY       3
  51 #endif /* !defined HAVE_SETTIMEOFDAY */
  52
  53 #ifndef HAVE_SYMLINK
  54 #define HAVE_SYMLINK            1
  55 #endif /* !defined HAVE_SYMLINK */
  56
  57 #ifndef HAVE_SYS_STAT_H
  58 #define HAVE_SYS_STAT_H         1
  59 #endif /* !defined HAVE_SYS_STAT_H */
  60
  61 #ifndef HAVE_SYS_WAIT_H
  62 #define HAVE_SYS_WAIT_H         1
  63 #endif /* !defined HAVE_SYS_WAIT_H */
  64
  65 #ifndef HAVE_UNISTD_H
  66 #define HAVE_UNISTD_H           1
  67 #endif /* !defined HAVE_UNISTD_H */
  68
  69 #ifndef HAVE_UTMPX_H
  70 #define HAVE_UTMPX_H            0
  71 #endif /* !defined HAVE_UTMPX_H */
  72
  73 #ifdef LOCALE_HOME
  74 #undef LOCALE_HOME              /* not to be handled by tzcode itself */
  75 #endif /* defined LOCALE_HOME */
  76
  77 #if HAVE_INCOMPATIBLE_CTIME_R
  78 #define asctime_r _incompatible_asctime_r
  79 #define ctime_r _incompatible_ctime_r
  80 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
  81
  82 /*
  83 ** Nested includes
  84 */
  85
  86 #include "sys/types.h"  /* for time_t */
  87 #include "stdio.h"
  88 #include "errno.h"
  89 #include "string.h"
  90 #include "limits.h"     /* for CHAR_BIT et al. */
  91 #include "time.h"
  92 #include "stdlib.h"
  93
  94 #if HAVE_GETTEXT
  95 #include "libintl.h"
  96 #endif /* HAVE_GETTEXT */
  97
  98 #if HAVE_SYS_WAIT_H
  99 #include <sys/wait.h>   /* for WIFEXITED and WEXITSTATUS */
 100 #endif /* HAVE_SYS_WAIT_H */
 101
 102 #ifndef WIFEXITED
 103 #define WIFEXITED(status)       (((status) & 0xff) == 0)
 104 #endif /* !defined WIFEXITED */
 105 #ifndef WEXITSTATUS
 106 #define WEXITSTATUS(status)     (((status) >> 8) & 0xff)
 107 #endif /* !defined WEXITSTATUS */
 108
 109 #if HAVE_UNISTD_H
 110 #include "unistd.h"     /* for F_OK, R_OK, and other POSIX goodness */
 111 #endif /* HAVE_UNISTD_H */
 112
 113 #ifndef F_OK
 114 #define F_OK    0
 115 #endif /* !defined F_OK */
 116 #ifndef R_OK
 117 #define R_OK    4
 118 #endif /* !defined R_OK */
 119
 120 /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
 121 #define is_digit(c) ((unsigned)(c) - '0' <= 9)
 122
 123 /*
 124 ** Define HAVE_STDINT_H's default value here, rather than at the
 125 ** start, since __GLIBC__'s value depends on previously-included
 126 ** files.
 127 ** (glibc 2.1 and later have stdint.h, even with pre-C99 compilers.)
 128 */
 129 #ifndef HAVE_STDINT_H
 130 #define HAVE_STDINT_H \
 131         (199901 <= __STDC_VERSION__ || \
 132         2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
 133 #endif /* !defined HAVE_STDINT_H */
 134
 135 #if HAVE_STDINT_H
 136 #include "stdint.h"
 137 #endif /* !HAVE_STDINT_H */
 138
 139 #ifndef INT_FAST64_MAX
 140 /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX.  */
 141 #if defined LLONG_MAX || defined __LONG_LONG_MAX__
 142 typedef long long       int_fast64_t;
 143 #else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
 144 #if (LONG_MAX >> 31) < 0xffffffff
 145 Please use a compiler that supports a 64-bit integer type (or wider);
 146 you may need to compile with "-DHAVE_STDINT_H".
 147 #endif /* (LONG_MAX >> 31) < 0xffffffff */
 148 typedef long            int_fast64_t;
 149 #endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
 150 #endif /* !defined INT_FAST64_MAX */
 151
 152 #ifndef INT32_MAX
 153 #define INT32_MAX 0x7fffffff
 154 #endif /* !defined INT32_MAX */
 155 #ifndef INT32_MIN
 156 #define INT32_MIN (-1 - INT32_MAX)
 157 #endif /* !defined INT32_MIN */
 158
 159 /*
 160 ** Workarounds for compilers/systems.
 161 */
 162
 163 /*
 164 ** Some time.h implementations don't declare asctime_r.
 165 ** Others might define it as a macro.
 166 ** Fix the former without affecting the latter.
 167 */
 168
 169 #ifndef asctime_r
 170 extern char *   asctime_r(struct tm const *, char *);
 171 #endif
 172
 173 /*
 174 ** Private function declarations.
 175 */
 176
 177 char *          icalloc(int nelem, int elsize);
 178 char *          icatalloc(char * old, const char * new);
 179 char *          icpyalloc(const char * string);
 180 char *          imalloc(int n);
 181 void *          irealloc(void * pointer, int size);
 182 void            icfree(char * pointer);
 183 void            ifree(char * pointer);
 184 const char *    scheck(const char * string, const char * format);
 185
 186 /*
 187 ** Finally, some convenience items.
 188 */
 189
 190 #ifndef TRUE
 191 #define TRUE    1
 192 #endif /* !defined TRUE */
 193
 194 #ifndef FALSE
 195 #define FALSE   0
 196 #endif /* !defined FALSE */
 197
 198 #ifndef TYPE_BIT
 199 #define TYPE_BIT(type)  (sizeof (type) * CHAR_BIT)
 200 #endif /* !defined TYPE_BIT */
 201
 202 #ifndef TYPE_SIGNED
 203 #define TYPE_SIGNED(type) (((type) -1) < 0)
 204 #endif /* !defined TYPE_SIGNED */
 205
 206 /*
 207 ** Since the definition of TYPE_INTEGRAL contains floating point numbers,
 208 ** it cannot be used in preprocessor directives.
 209 */
 210
 211 #ifndef TYPE_INTEGRAL
 212 #define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5)
 213 #endif /* !defined TYPE_INTEGRAL */
 214
 215 #ifndef INT_STRLEN_MAXIMUM
 216 /*
 217 ** 302 / 1000 is log10(2.0) rounded up.
 218 ** Subtract one for the sign bit if the type is signed;
 219 ** add one for integer division truncation;
 220 ** add one more for a minus sign if the type is signed.
 221 */
 222 #define INT_STRLEN_MAXIMUM(type) \
 223         ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
 224         1 + TYPE_SIGNED(type))
 225 #endif /* !defined INT_STRLEN_MAXIMUM */
 226
 227 /*
 228 ** INITIALIZE(x)
 229 */
 230
 231 #ifndef GNUC_or_lint
 232 #ifdef lint
 233 #define GNUC_or_lint
 234 #endif /* defined lint */
 235 #ifndef lint
 236 #ifdef __GNUC__
 237 #define GNUC_or_lint
 238 #endif /* defined __GNUC__ */
 239 #endif /* !defined lint */
 240 #endif /* !defined GNUC_or_lint */
 241
 242 #ifndef INITIALIZE
 243 #ifdef GNUC_or_lint
 244 #define INITIALIZE(x)   ((x) = 0)
 245 #endif /* defined GNUC_or_lint */
 246 #ifndef GNUC_or_lint
 247 #define INITIALIZE(x)
 248 #endif /* !defined GNUC_or_lint */
 249 #endif /* !defined INITIALIZE */
 250
 251 /*
 252 ** For the benefit of GNU folk...
 253 ** `_(MSGID)' uses the current locale's message library string for MSGID.
 254 ** The default is to use gettext if available, and use MSGID otherwise.
 255 */
 256
 257 #ifndef _
 258 #if HAVE_GETTEXT
 259 #define _(msgid) gettext(msgid)
 260 #else /* !HAVE_GETTEXT */
 261 #define _(msgid) msgid
 262 #endif /* !HAVE_GETTEXT */
 263 #endif /* !defined _ */
 264
 265 #ifndef TZ_DOMAIN
 266 #define TZ_DOMAIN "tz"
 267 #endif /* !defined TZ_DOMAIN */
 268
 269 #if HAVE_INCOMPATIBLE_CTIME_R
 270 #undef asctime_r
 271 #undef ctime_r
 272 char *asctime_r(struct tm const *, char *);
 273 char *ctime_r(time_t const *, char *);
 274 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
 275
 276 #ifndef YEARSPERREPEAT
 277 #define YEARSPERREPEAT          400     /* years before a Gregorian repeat */
 278 #endif /* !defined YEARSPERREPEAT */
 279
 280 /*
 281 ** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
 282 */
 283
 284 #ifndef AVGSECSPERYEAR
 285 #define AVGSECSPERYEAR          31556952L
 286 #endif /* !defined AVGSECSPERYEAR */
 287
 288 #ifndef SECSPERREPEAT
 289 #define SECSPERREPEAT           ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
 290 #endif /* !defined SECSPERREPEAT */
 291
 292 #ifndef SECSPERREPEAT_BITS
 293 #define SECSPERREPEAT_BITS      34      /* ceil(log2(SECSPERREPEAT)) */
 294 #endif /* !defined SECSPERREPEAT_BITS */
 295
 296 /*
 297 ** UNIX was a registered trademark of The Open Group in 2003.
 298 */
 299
 300 #endif /* !defined PRIVATE_H */