rmodulo2m.h File Reference

#include "misc/auxiliary.h"

Go to the source code of this file.

Functions
BOOLEAN	nr2mInitChar (coeffs r, void *)
number	nr2mMapZp (number from, const coeffs, const coeffs dst)

Function Documentation

nr2mInitChar()

BOOLEAN nr2mInitChar	(	coeffs	r,
		void *	p
	)

Definition at line 770 of file rmodulo2m.cc.

{
  assume( getCoeffType(r) == n_Z2m );
  nr2mInitExp((int)(long)(p), r);
 
  r->is_field=FALSE;
  r->is_domain=FALSE;
  r->rep=n_rep_int;
 
  //r->cfKillChar    = ndKillChar; /* dummy*/
  r->nCoeffIsEqual = nr2mCoeffIsEqual;
 
  r->modBase = (mpz_ptr) omAllocBin (gmp_nrz_bin);
  mpz_init_set_si (r->modBase, 2L);
  r->modNumber= (mpz_ptr) omAllocBin (gmp_nrz_bin);
  mpz_init (r->modNumber);
  mpz_pow_ui (r->modNumber, r->modBase, r->modExponent);
 
  /* next cast may yield an overflow as mod2mMask is an unsigned long */
  r->ch = (int)r->mod2mMask + 1;
 
  r->cfInit        = nr2mInit;
  //r->cfCopy        = ndCopy;
  r->cfInt         = nr2mInt;
  r->cfAdd         = nr2mAdd;
  r->cfSub         = nr2mSub;
  r->cfMult        = nr2mMult;
  r->cfDiv         = nr2mDiv;
  r->cfAnn         = nr2mAnn;
  r->cfIntMod      = nr2mMod;
  r->cfExactDiv    = nr2mDiv;
  r->cfInpNeg         = nr2mNeg;
  r->cfInvers      = nr2mInvers;
  r->cfDivBy       = nr2mDivBy;
  r->cfDivComp     = nr2mDivComp;
  r->cfGreater     = nr2mGreater;
  r->cfEqual       = nr2mEqual;
  r->cfIsZero      = nr2mIsZero;
  r->cfIsOne       = nr2mIsOne;
  r->cfIsMOne      = nr2mIsMOne;
  r->cfGreaterZero = nr2mGreaterZero;
  r->cfWriteLong       = nr2mWrite;
  r->cfRead        = nr2mRead;
  r->cfPower       = nr2mPower;
  r->cfSetMap      = nr2mSetMap;
//  r->cfNormalize   = ndNormalize; // default
  r->cfLcm         = nr2mLcm;
  r->cfGcd         = nr2mGcd;
  r->cfIsUnit      = nr2mIsUnit;
  r->cfGetUnit     = nr2mGetUnit;
  r->cfExtGcd      = nr2mExtGcd;
  r->cfCoeffName   = nr2mCoeffName;
  r->cfQuot1       = nr2mQuot1;
#ifdef LDEBUG
  r->cfDBTest      = nr2mDBTest;
#endif
  r->has_simple_Alloc=TRUE;
  return FALSE;
}

nr2mMapZp()

number nr2mMapZp	(	number	from,
		const	coeffs,
		const coeffs	dst
	)

Definition at line 613 of file rmodulo2m.cc.

{
  unsigned long j = (unsigned long)1;
  long ii = (long)from;
  if (ii < 0) { j = dst->mod2mMask; ii = -ii; }
  unsigned long i = (unsigned long)ii;
  i = i & dst->mod2mMask;
  /* now we have: from = j * i mod 2^m */
  return (number)nr2mMult((number)i, (number)j, dst);
}