104 lines
3.8 KiB
C
104 lines
3.8 KiB
C
/*
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$Header: /cvs/src/chrony/util.h,v 1.15 2003/09/22 21:22:30 richard Exp $
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=======================================================================
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2003
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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**********************************************************************
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=======================================================================
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Various utility functions
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*/
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#ifndef GOT_UTIL_H
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#define GOT_UTIL_H
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#include "sysincl.h"
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#include "ntp.h"
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/* Convert a timeval into a floating point number of seconds */
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extern void UTI_TimevalToDouble(struct timeval *a, double *b);
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/* Convert a number of seconds expressed in floating point into a
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timeval */
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extern void UTI_DoubleToTimeval(double a, struct timeval *b);
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/* Returns -1 if a comes earlier than b, 0 if a is the same time as b,
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and +1 if a comes after b */
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extern int UTI_CompareTimevals(struct timeval *a, struct timeval *b);
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/* Normalise a struct timeval, by adding or subtracting seconds to bring
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its microseconds field into range */
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extern void UTI_NormaliseTimeval(struct timeval *x);
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/* Calculate result = a - b */
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extern void UTI_DiffTimevals(struct timeval *result, struct timeval *a, struct timeval *b);
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/* Calculate result = a - b and return as a double */
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extern void UTI_DiffTimevalsToDouble(double *result, struct timeval *a, struct timeval *b);
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/* Add a double increment to a timeval to get a new one. 'start' is
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the starting time, 'end' is the result that we return. This is
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safe to use if start and end are the same */
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extern void UTI_AddDoubleToTimeval(struct timeval *start, double increment, struct timeval *end);
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/* Calculate the average and difference (as a double) of two timevals */
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extern void UTI_AverageDiffTimevals(struct timeval *earlier, struct timeval *later, struct timeval *average, double *diff);
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/* Convert a timeval into a temporary string, largely for diagnostic
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display */
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extern char *UTI_TimevalToString(struct timeval *tv);
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/* Convert an NTP timestamp into a temporary string, largely for
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diagnostic display */
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extern char *UTI_TimestampToString(NTP_int64 *ts);
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/* Convert an IP address to dotted quad notation, for diagnostics */
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extern char *UTI_IPToDottedQuad(unsigned long ip);
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extern char *UTI_TimeToLogForm(time_t t);
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/* Adjust time following a frequency/offset change */
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extern void UTI_AdjustTimeval(struct timeval *old_tv, struct timeval *when, struct timeval *new_tv, double dfreq, double doffset);
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extern void UTI_TimevalToInt64(struct timeval *src, NTP_int64 *dest);
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extern void UTI_Int64ToTimeval(NTP_int64 *src, struct timeval *dest);
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/* Like assert(0) */
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#if defined(LINUX) && defined(__alpha__)
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#define CROAK(message) assert(0) /* Added JGH Feb 24 2001 FIXME */
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#else
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extern int croak(const char *file, int line, const char *msg);
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#define CROAK(message) croak(__FILE__, __LINE__, message);
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#endif
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#if defined (INLINE_UTILITIES)
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#define INLINE_STATIC inline static
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#include "util.c"
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#else
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#define INLINE_STATIC
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#endif /* defined (INLINE_UTILITIES) */
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#endif /* GOT_UTIL_H */
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