source: git/kernel/misc.cc @ 35aab3

/****************************************
*  Computer Algebra System SINGULAR     *
****************************************/
/*
* ABSTRACT:
*/

#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <time.h>

#include "mod2.h"
#include <mylimits.h>
#include "omalloc.h"
#include "structs.h"
#include "febase.h"
//#include "cntrlc.h"
#include "kstd1.h"
#include "timer.h"
#include "intvec.h"
#include "ring.h"
#include "omSingularConfig.h"
#include "p_Procs.h"
#include "version.h"

#include "static.h"
#ifdef HAVE_STATIC
#undef HAVE_DYN_RL
#endif

#define SI_DONT_HAVE_GLOBAL_VARS

//#ifdef HAVE_LIBPARSER
//#  include "libparse.h"
//#endif /* HAVE_LIBPARSER */

#ifdef HAVE_FACTORY
#include <factory.h>
#endif

/* version strings */
#ifdef HAVE_LIBFAC_P
  extern const char * libfac_version;
  extern const char * libfac_date;
#endif
extern "C" {
#include <gmp.h>
}
#ifdef HAVE_MPSR
#include <MP_Config.h>
#endif

/* init bins from structs.h */

omBin MP_INT_bin = omGetSpecBin(sizeof(MP_INT));
omBin char_ptr_bin = omGetSpecBin(sizeof(char_ptr));
omBin ideal_bin = omGetSpecBin(sizeof(ideal));
omBin int_bin = omGetSpecBin(sizeof(int));
omBin poly_bin = omGetSpecBin(sizeof(poly));
omBin void_ptr_bin = omGetSpecBin(sizeof(void_ptr));
omBin indlist_bin = omGetSpecBin(sizeof(indlist));
omBin naIdeal_bin = omGetSpecBin(sizeof(naIdeal));
omBin snaIdeal_bin = omGetSpecBin(sizeof(snaIdeal));
omBin sm_prec_bin = omGetSpecBin(sizeof(sm_prec));
omBin smprec_bin = omGetSpecBin(sizeof(smprec));
omBin sip_sideal_bin = omGetSpecBin(sizeof(sip_sideal));
omBin sip_smap_bin = omGetSpecBin(sizeof(sip_smap));
omBin sip_sring_bin = omGetSpecBin(sizeof(sip_sring));
omBin ip_sideal_bin = omGetSpecBin(sizeof(ip_sideal));
omBin ip_smap_bin = omGetSpecBin(sizeof(ip_smap));
omBin ip_sring_bin = omGetSpecBin(sizeof(ip_sring));

/*0 implementation*/

/*2
* the global exit routine of Singular
*/
extern "C" {
void m2_end(short i)
{
  fe_reset_input_mode();
  #ifdef PAGE_TEST
  mmEndStat();
  #endif
  #ifdef HAVE_TCL
  if (tclmode)
  {
    PrintTCL('Q',0,NULL);
  }
  #endif
  fe_reset_input_mode();
  if (i<=0)
  {
    #ifdef HAVE_TCL
    if (!tclmode)
    #endif
      if (BVERBOSE(0))
      {
        if (i==0)
          printf("Auf Wiedersehen.\n");
        else
          printf("\n$Bye.\n");
      }
    #ifdef sun
      #ifndef __svr4__
        _cleanup();
        _exit(0);
      #endif
    #endif
    exit(0);
  }
  else
  {
    #ifdef HAVE_TCL
    if (!tclmode)
    #endif
      printf("\nhalt %d\n",i);
  }
  exit(i);
}
}

/*2
* the renice routine for very large jobs
* works only on unix machines,
* testet on : linux, HP 9.0
*
*#ifndef MSDOS
*#ifndef macintosh
*#include <sys/times.h>
*#include <sys/resource.h>
*extern "C" int setpriority(int,int,int);
*void very_nice()
*{
*#ifndef NO_SETPRIORITY
*  setpriority(PRIO_PROCESS,0,19);
*#endif
*  sleep(10);
*}
*#else
*void very_nice(){}
*#endif
*#else
*void very_nice(){}
*#endif
*/

/*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*/
#ifdef buildin_rand
/*
 *
 *  A prime modulus multiplicative linear congruential
 *  generator (PMMLCG), or "Lehmer generator".
 *  Implementation directly derived from the article:
 *
 *        S. K. Park and K. W. Miller
 *        Random Number Generators: Good Ones are Hard to Find
 *        CACM vol 31, #10. Oct. 1988. pp 1192-1201.
 *
 *  Using the following multiplier and modulus, we obtain a
 *  generator which:
 *
 *        1)  Has a full period: 1 to 2^31 - 2.
 *        2)  Is testably "random" (see the article).
 *        3)  Has a known implementation by E. L. Schrage.
 */


#define  A        16807L        /*  A "good" multiplier          */
#define  M   2147483647L        /*  Modulus: 2^31 - 1          */
#define  Q       127773L        /*  M / A                  */
#define  R         2836L        /*  M % A                  */


int siSeed = 1L;


int siRand()
{
  siSeed = A * (siSeed % Q) - R * (siSeed / Q);

  if ( siSeed < 0 )
    siSeed += M;

  return( siSeed );
}
#endif