/* crypto/tmdiff.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
#include <stdio.h>
#include <stdlib.h>
#include "cryptlib.h"
#include <openssl/tmdiff.h>
#if !defined(OPENSSL_SYS_MSDOS)
# include OPENSSL_UNISTD
#endif

#ifdef TIMEB
# undef OPENSSL_SYS_WIN32
# undef TIMES
#endif

#if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN32) && !(defined(OPENSSL_SYS_VMS) || defined(__DECC)) && !defined(OPENSSL_SYS_MACOSX_RHAPSODY) && !defined(OPENSSL_SYS_VXWORKS)
# define TIMES
#endif

#ifdef OPENSSL_SYS_NETWARE
# undef TIMES
#endif

#if !defined(_IRIX) || defined (OPENSSL_SYS_NETWARE)
# include <time.h>
#endif
#ifdef TIMES
# include <sys/types.h>
# include <sys/times.h>
#endif

/*
 * Depending on the VMS version, the tms structure is perhaps defined. The
 * __TMS macro will show if it was.  If it wasn't defined, we should undefine
 * TIMES, since that tells the rest of the program how things should be
 * handled.  -- Richard Levitte
 */
#if defined(OPENSSL_SYS_VMS_DECC) && !defined(__TMS)
# undef TIMES
#endif

#if defined(sun) || defined(__ultrix)
# define _POSIX_SOURCE
# include <limits.h>
# include <sys/param.h>
#endif

#if !defined(TIMES) && !defined(OPENSSL_SYS_VXWORKS) && !defined(OPENSSL_SYS_NETWARE)
# include <sys/timeb.h>
#endif

#ifdef OPENSSL_SYS_WIN32
# include <windows.h>
#endif

/* The following if from times(3) man page.  It may need to be changed */
#ifndef HZ
# if defined(_SC_CLK_TCK) \
     && (!defined(OPENSSL_SYS_VMS) || __CTRL_VER >= 70000000)
/* #  define HZ ((double)sysconf(_SC_CLK_TCK)) */
#  define HZ sysconf(_SC_CLK_TCK)
# else
#  ifndef CLK_TCK
#   ifndef _BSD_CLK_TCK_        /* FreeBSD hack */
#    define HZ  100.0
#   else                        /* _BSD_CLK_TCK_ */
#    define HZ ((double)_BSD_CLK_TCK_)
#   endif
#  else                         /* CLK_TCK */
#   define HZ ((double)CLK_TCK)
#  endif
# endif
#endif

struct ms_tm {
#ifdef TIMES
    struct tms ms_tms;
#else
# ifdef OPENSSL_SYS_WIN32
    HANDLE thread_id;
    FILETIME ms_win32;
# elif defined (OPENSSL_SYS_NETWARE)
    clock_t ms_clock;
# else
#  ifdef OPENSSL_SYS_VXWORKS
    unsigned long ticks;
#  else
    struct timeb ms_timeb;
#  endif
# endif
#endif
};

MS_TM *ms_time_new(void)
{
    MS_TM *ret;

    ret = (MS_TM *) OPENSSL_malloc(sizeof(MS_TM));
    if (ret == NULL)
        return (NULL);
    memset(ret, 0, sizeof(MS_TM));
#ifdef OPENSSL_SYS_WIN32
    ret->thread_id = GetCurrentThread();
#endif
    return ret;
}

void ms_time_free(MS_TM * a)
{
    if (a != NULL)
        OPENSSL_free(a);
}

void ms_time_get(MS_TM * tm)
{
#ifdef OPENSSL_SYS_WIN32
    FILETIME tmpa, tmpb, tmpc;
#endif

#ifdef TIMES
    times(&tm->ms_tms);
#else
# ifdef OPENSSL_SYS_WIN32
    GetThreadTimes(tm->thread_id, &tmpa, &tmpb, &tmpc, &(tm->ms_win32));
# elif defined (OPENSSL_SYS_NETWARE)
    tm->ms_clock = clock();
# else
#  ifdef OPENSSL_SYS_VXWORKS
    tm->ticks = tickGet();
#  else
    ftime(&tm->ms_timeb);
#  endif
# endif
#endif
}

double ms_time_diff(MS_TM * a, MS_TM * b)
{
    double ret;

#ifdef TIMES
    ret = HZ;
    ret = (b->ms_tms.tms_utime - a->ms_tms.tms_utime) / ret;
#else
# ifdef OPENSSL_SYS_WIN32
    {
#  ifdef __GNUC__
        signed long long la, lb;
#  else
        signed _int64 la, lb;
#  endif
        la = a->ms_win32.dwHighDateTime;
        lb = b->ms_win32.dwHighDateTime;
        la <<= 32;
        lb <<= 32;
        la += a->ms_win32.dwLowDateTime;
        lb += b->ms_win32.dwLowDateTime;
        ret = ((double)(lb - la)) / 1e7;
    }
# elif defined (OPENSSL_SYS_NETWARE)
    ret = (double)(b->ms_clock - a->ms_clock);
# else
#  ifdef OPENSSL_SYS_VXWORKS
    ret = (double)(b->ticks - a->ticks) / (double)sysClkRateGet();
#  else
    ret = (double)(b->ms_timeb.time - a->ms_timeb.time) +
        (((double)b->ms_timeb.millitm) -
         ((double)a->ms_timeb.millitm)) / 1000.0;
#  endif
# endif
#endif
    return ((ret < 0.0000001) ? 0.0000001 : ret);
}

int ms_time_cmp(const MS_TM * a, const MS_TM * b)
{
    double d;
    int ret;

#ifdef TIMES
    d = HZ;
    d = (b->ms_tms.tms_utime - a->ms_tms.tms_utime) / d;
#else
# ifdef OPENSSL_SYS_WIN32
    d = (b->ms_win32.dwHighDateTime & 0x000fffff) * 10 +
        b->ms_win32.dwLowDateTime / 1e7;
    d -= (a->ms_win32.dwHighDateTime & 0x000fffff) * 10 +
        a->ms_win32.dwLowDateTime / 1e7;
# elif defined (OPENSSL_SYS_NETWARE)
    d = (double)(b->ms_clock - a->ms_clock);
# else
#  ifdef OPENSSL_SYS_VXWORKS
    d = (b->ticks - a->ticks);
#  else
    d = (double)(b->ms_timeb.time - a->ms_timeb.time) +
        (((double)b->ms_timeb.millitm) -
         (double)a->ms_timeb.millitm) / 1000.0;
#  endif
# endif
#endif
    if (d == 0.0)
        ret = 0;
    else if (d < 0)
        ret = -1;
    else
        ret = 1;
    return (ret);
}