lib/libc/stdtime/private.h

   1 /*
   2  * $FreeBSD: head/contrib/tzcode/stdtime/private.h 192625 2009-05-23 06:31:50Z edwin $
   3  */
   4
   5 #ifndef PRIVATE_H
   6
   7 #define PRIVATE_H
   8 /*
   9 ** This file is in the public domain, so clarified as of
  10 ** 1996-06-05 by Arthur David Olson.
  11 */
  12
  13 /* Stuff moved from Makefile.inc to reduce clutter */
  14 #ifndef TM_GMTOFF
  15 #define TM_GMTOFF       tm_gmtoff
  16 #define TM_ZONE         tm_zone
  17 #define TZDIR           "/usr/share/zoneinfo"
  18 #endif /* ndef TM_GMTOFF */
  19
  20 /*
  21 ** This header is for use ONLY with the time conversion code.
  22 ** There is no guarantee that it will remain unchanged,
  23 ** or that it will remain at all.
  24 ** Do NOT copy it to any system include directory.
  25 ** Thank you!
  26 */
  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_GETTEXT
  36 #define HAVE_GETTEXT            0
  37 #endif /* !defined HAVE_GETTEXT */
  38
  39 /*
  40 ** Nested includes
  41 */
  42
  43 #include "sys/types.h"  /* for time_t */
  44 #include "stdio.h"
  45 #include "errno.h"
  46 #include "string.h"
  47 #include "limits.h"     /* for CHAR_BIT et al. */
  48 #include "time.h"
  49 #include "stdlib.h"
  50
  51 #if HAVE_GETTEXT
  52 #include "libintl.h"
  53 #endif /* HAVE_GETTEXT */
  54
  55 #include <sys/wait.h>   /* for WIFEXITED and WEXITSTATUS */
  56
  57 #include "unistd.h"     /* for F_OK, R_OK, and other POSIX goodness */
  58
  59 /* Unlike <ctype.h>'s isdigit, this also works if c < 0 | c > UCHAR_MAX. */
  60 #define is_digit(c) ((unsigned)(c) - '0' <= 9)
  61
  62 #include "stdint.h"
  63 #include <inttypes.h>
  64
  65 /*
  66 ** Private function declarations.
  67 */
  68
  69 char *          icatalloc(char * old, const char * new);
  70 char *          icpyalloc(const char * string);
  71 const char *    scheck(const char * string, const char * format);
  72
  73 /*
  74 ** Finally, some convenience items.
  75 */
  76
  77 #ifndef TRUE
  78 #define TRUE    1
  79 #endif /* !defined TRUE */
  80
  81 #ifndef FALSE
  82 #define FALSE   0
  83 #endif /* !defined FALSE */
  84
  85 #ifndef TYPE_BIT
  86 #define TYPE_BIT(type)  (sizeof (type) * CHAR_BIT)
  87 #endif /* !defined TYPE_BIT */
  88
  89 #ifndef TYPE_SIGNED
  90 #define TYPE_SIGNED(type) (((type) -1) < 0)
  91 #endif /* !defined TYPE_SIGNED */
  92
  93 /* The minimum and maximum finite time values.  */
  94 static time_t const time_t_min =
  95   (TYPE_SIGNED(time_t)
  96    ? (time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1)
  97    : 0);
  98 static time_t const time_t_max =
  99   (TYPE_SIGNED(time_t)
 100    ? - (~ 0 < 0) - ((time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1))
 101    : -1);
 102
 103 /*
 104 ** Since the definition of TYPE_INTEGRAL contains floating point numbers,
 105 ** it cannot be used in preprocessor directives.
 106 */
 107
 108 #ifndef TYPE_INTEGRAL
 109 #define TYPE_INTEGRAL(type) (((type) 0.5) != 0.5)
 110 #endif /* !defined TYPE_INTEGRAL */
 111
 112 #ifndef INT_STRLEN_MAXIMUM
 113 /*
 114 ** 302 / 1000 is log10(2.0) rounded up.
 115 ** Subtract one for the sign bit if the type is signed;
 116 ** add one for integer division truncation;
 117 ** add one more for a minus sign if the type is signed.
 118 */
 119 #define INT_STRLEN_MAXIMUM(type) \
 120         ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \
 121         1 + TYPE_SIGNED(type))
 122 #endif /* !defined INT_STRLEN_MAXIMUM */
 123
 124 /*
 125 ** INITIALIZE(x)
 126 */
 127
 128 #ifndef GNUC_or_lint
 129 #ifdef lint
 130 #define GNUC_or_lint
 131 #endif /* defined lint */
 132 #ifndef lint
 133 #ifdef __GNUC__
 134 #define GNUC_or_lint
 135 #endif /* defined __GNUC__ */
 136 #endif /* !defined lint */
 137 #endif /* !defined GNUC_or_lint */
 138
 139 #ifndef INITIALIZE
 140 #ifdef GNUC_or_lint
 141 #define INITIALIZE(x)   ((x) = 0)
 142 #endif /* defined GNUC_or_lint */
 143 #ifndef GNUC_or_lint
 144 #define INITIALIZE(x)
 145 #endif /* !defined GNUC_or_lint */
 146 #endif /* !defined INITIALIZE */
 147
 148 /*
 149 ** For the benefit of GNU folk...
 150 ** `_(MSGID)' uses the current locale's message library string for MSGID.
 151 ** The default is to use gettext if available, and use MSGID otherwise.
 152 */
 153
 154 #ifndef _
 155 #if HAVE_GETTEXT
 156 #define _(msgid) gettext(msgid)
 157 #else /* !HAVE_GETTEXT */
 158 #define _(msgid) msgid
 159 #endif /* !HAVE_GETTEXT */
 160 #endif /* !defined _ */
 161
 162 #ifndef TZ_DOMAIN
 163 #define TZ_DOMAIN "tz"
 164 #endif /* !defined TZ_DOMAIN */
 165
 166 #ifndef YEARSPERREPEAT
 167 #define YEARSPERREPEAT          400     /* years before a Gregorian repeat */
 168 #endif /* !defined YEARSPERREPEAT */
 169
 170 /*
 171 ** The Gregorian year averages 365.2425 days, which is 31556952 seconds.
 172 */
 173
 174 #ifndef AVGSECSPERYEAR
 175 #define AVGSECSPERYEAR          31556952L
 176 #endif /* !defined AVGSECSPERYEAR */
 177
 178 #ifndef SECSPERREPEAT
 179 #define SECSPERREPEAT           ((int_fast64_t) YEARSPERREPEAT * (int_fast64_t) AVGSECSPERYEAR)
 180 #endif /* !defined SECSPERREPEAT */
 181
 182 #ifndef SECSPERREPEAT_BITS
 183 #define SECSPERREPEAT_BITS      34      /* ceil(log2(SECSPERREPEAT)) */
 184 #endif /* !defined SECSPERREPEAT_BITS */
 185
 186 /*
 187 ** UNIX was a registered trademark of The Open Group in 2003.
 188 */
 189
 190 #endif /* !defined PRIVATE_H */