Esempio n. 1
0
File: mpc.c Progetto: rforge/mpc
SEXP R_mpc_div(SEXP e1, SEXP e2) {
	/* N.B. We always use signed integers for e2 given R's type system. */
	mpc_t *z = (mpc_t *)malloc(sizeof(mpc_t));
	if (Rf_inherits(e1, "mpc")) {
		mpc_t *z1 = (mpc_t *)R_ExternalPtrAddr(e1);
		if (Rf_inherits(e2, "mpc")) {
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpc_init2(*z, max(mpc_get_prec(*z1),
				mpc_get_prec(*z2)));
			mpc_div(*z, *z1, *z2, Rmpc_get_rounding());
		} else if (Rf_isInteger(e2)) {
			mpc_init2(*z, mpc_get_prec(*z1));
			mpc_div_ui(*z, *z1, INTEGER(e2)[0],
			    Rmpc_get_rounding());
		} else if (Rf_isNumeric(e2)) {
			mpc_init2(*z, mpc_get_prec(*z1));
			mpfr_t x;
			mpfr_init2(x, 53);
			mpfr_set_d(x, REAL(e2)[0], GMP_RNDN);
			mpc_div_fr(*z, *z1, x, Rmpc_get_rounding());
		} else {
			Rf_error("Invalid second operand for mpc division.");
		}
	} else if (Rf_isInteger(e1)) {
		if (Rf_inherits(e2, "mpc")) {
			/* TODO: sign issue here.  mpc_ui_div is
			 * unsigned, mult -1 if needed by asnwer? */
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpc_init2(*z, mpc_get_prec(*z2));
			mpc_ui_div(*z, INTEGER(e1)[0], *z2,
			    Rmpc_get_rounding());
		} else {
			Rf_error("Invalid second operand for mpc division.");
		}
	} else if (Rf_isNumeric(e1)) {
		if (Rf_inherits(e2, "mpc")) {
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpfr_t x;
			mpfr_init2(x, 53);
			mpfr_set_d(x, REAL(e2)[0], GMP_RNDN);
			mpc_fr_div(*z, x, *z2, Rmpc_get_rounding());

		} else {
			Rf_error("Invalid second operand for mpc division.");
		}
	} else {
		Rf_error("Invalid operands for mpc division.");
	}
	SEXP retVal = PROTECT(R_MakeExternalPtr((void *)z,
		Rf_install("mpc ptr"), R_NilValue));
	Rf_setAttrib(retVal, R_ClassSymbol, Rf_mkString("mpc"));
	R_RegisterCFinalizerEx(retVal, mpcFinalizer, TRUE);
	UNPROTECT(1);
	return retVal;
}
Esempio n. 2
0
File: mpc.c Progetto: rforge/mpc
SEXP R_mpc_pow(SEXP e1, SEXP e2) {
	mpc_t *z = (mpc_t *)malloc(sizeof(mpc_t));
	if (Rf_inherits(e1, "mpc")) {
		mpc_t *z1 = (mpc_t *)R_ExternalPtrAddr(e1);
		if (Rf_inherits(e2, "mpc")) {
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpc_init2(*z, max(mpc_get_prec(*z1),
				mpc_get_prec(*z2)));
			mpc_pow(*z, *z1, *z2, Rmpc_get_rounding());
		} else if (Rf_isInteger(e2)) {
			mpc_init2(*z, mpc_get_prec(*z1));
			mpc_pow_si(*z, *z1, INTEGER(e2)[0],
			    Rmpc_get_rounding());
		} else if (Rf_isNumeric(e2)) {
			mpc_init2(*z, mpc_get_prec(*z1));
			mpc_pow_d(*z, *z1, REAL(e2)[0], Rmpc_get_rounding());
		} else {
			Rf_error("Invalid second operand for mpc power.");
		}
	} else {
		Rf_error("Invalid first operand for MPC power.");
	}
	SEXP retVal = PROTECT(R_MakeExternalPtr((void *)z,
		Rf_install("mpc ptr"), R_NilValue));
	Rf_setAttrib(retVal, R_ClassSymbol, Rf_mkString("mpc"));
	R_RegisterCFinalizerEx(retVal, mpcFinalizer, TRUE);
	UNPROTECT(1);
	return retVal;
}
Esempio n. 3
0
 inline R_adjacency_list(SEXP num_verts_in,
                         SEXP num_edges_in,
                         SEXP R_edges_in,
                         SEXP R_weights_in)
         : Base(Rf_asInteger(num_verts_in))
 {
     if (!Rf_isNumeric(R_weights_in)) error("R_weights_in should be Numeric");
     if (!Rf_isInteger(R_edges_in)) error("R_edges_in should be integer");
     int NE = Rf_asInteger(num_edges_in);
     int* edges_in = INTEGER(R_edges_in);
     if (Rf_isReal(R_weights_in)) {
         if (boost::is_integral<R_weight_type>::value)
             error("R_weights_in should be integer");
         else {
             double* weights_in = REAL(R_weights_in);
             for (int i = 0; i < NE ; i++, edges_in += 2, weights_in++) {
                 boost::add_edge(*edges_in, *(edges_in+1),
                                 *weights_in, *this);
             }
         }
     } else {
         int* weights_in = INTEGER(R_weights_in);
         for (int i = 0; i < NE ; i++, edges_in += 2, weights_in++) {
             boost::add_edge(*edges_in, *(edges_in+1), *weights_in, *this);
         }
     }
 }
Esempio n. 4
0
File: mpc.c Progetto: rforge/mpc
/* R_mpc - Create an MPC S3 object for arbitrary precision complex numbers.
 *
 * We currently use external pointers for performance reasons, which
 * means that we can't allocVector a list of length(n) MPC objects,
 * and instead must instantiate them one at a time, that a caller can
 * put into a list if they want, but not a vector.
 *
 * Args:
 *   n -   An integer, numeric, or complex number to convert to an MPC.
 *   sprec  - The number of bits of precision to use, e.g. 52 for doubles.
 */
SEXP R_mpc(SEXP n, SEXP sprec) {
	/* TODO: INTEGER returns 32bit integer but mpfr_prec_t may be
	 * 64bit. This is based on how mpfr was compiled. Therefore we
	 * could add this as a configure check? */
	mpfr_prec_t prec = INTEGER(sprec)[0];
	mpc_t *z = (mpc_t *)malloc(sizeof(mpc_t));
	if (z == NULL) {
		Rf_error("Could not allocate memory for MPC type.");
	}
	mpc_init2(*z, prec);

	if (Rf_isInteger(n)) {
		mpc_set_d(*z, INTEGER(n)[0], Rmpc_get_rounding());
	} else if (Rf_isNumeric(n)) {
		mpc_set_d(*z, REAL(n)[0], Rmpc_get_rounding());
	} else if (Rf_isComplex(n)) {
		mpc_set_d_d(*z, COMPLEX(n)[0].r, COMPLEX(n)[0].i,
		    Rmpc_get_rounding());
	} else if (Rf_isString(n)) {
		mpc_set_str(*z, CHAR(STRING_ELT(n, 0)), 10,
		    Rmpc_get_rounding());
	} else {
		Rf_error("Unsupported type conversion to MPC.");
	}
	return(MakeMPC(z));
}
Esempio n. 5
0
 ConstVectorView ToBoomVectorView(SEXP v) {
   if (!Rf_isNumeric(v)) {
     report_error("ToBoomVectorView called with a non-numeric argument.");
   }
   PROTECT(v = Rf_coerceVector(v, REALSXP));
   int n = Rf_length(v);
   double *data = REAL(v);
   UNPROTECT(1);
   return ConstVectorView(data, n, 1);
 }
Esempio n. 6
0
RcppDateVector::RcppDateVector(SEXP vec) {
    int i;
    if (!Rf_isNumeric(vec) || Rf_isMatrix(vec) || Rf_isLogical(vec))
	throw std::range_error("RcppDateVector: invalid numeric vector in constructor");
    int len = Rf_length(vec);
    if (len == 0)
	throw std::range_error("RcppDateVector: null vector in constructor");
    v.resize(len);
    for (i = 0; i < len; i++)
	v[i] = RcppDate( (int) REAL(vec)[i]);
}
Esempio n. 7
0
RcppDatetime RcppParams::getDatetimeValue(std::string name) {
    std::map<std::string,int>::iterator iter = pmap.find(name);
    if (iter == pmap.end()) {
        std::string mesg = "RcppParams::getDatetimeValue: no such name: ";
	throw std::range_error(mesg+name);
    }
    int posn = iter->second;
    SEXP elt = VECTOR_ELT(_params, posn);
    if (!Rf_isNumeric(elt) || Rf_length(elt) != 1) {
	std::string mesg = "RcppParams::getDateValue: invalide date: ";
	throw std::range_error(mesg+name);
    }
    double d;
    if (Rf_isReal(elt)) 	// R stores POSIXt as a double
	d = REAL(elt)[0];
    else {
	std::string mesg = "RcppParams::getDatetimeValue: invalid value for: ";
	throw std::range_error(mesg+name);
    }
    return RcppDatetime(d);
}
Esempio n. 8
0
int RcppParams::getIntValue(std::string name) {
    std::map<std::string,int>::iterator iter = pmap.find(name);
    if (iter == pmap.end()) {
	std::string mesg = "RcppParams::getIntValue: no such name: ";
	throw std::range_error(mesg+name);
    }
    int posn = iter->second;
    SEXP elt = VECTOR_ELT(_params,posn);
    if (!Rf_isNumeric(elt) || Rf_length(elt) != 1) {
	std::string mesg = "RcppParams::getIntValue: must be scalar: ";
	throw std::range_error(mesg+name);
    }
    if (Rf_isInteger(elt))
	return INTEGER(elt)[0];
    else if (Rf_isReal(elt))
	return (int)REAL(elt)[0];
    else {
	std::string mesg = "RcppParams::getIntValue: invalid value for: ";
	throw std::range_error(mesg+name);
    }
    return 0; // never get here
}
Esempio n. 9
0
std::vector<byte> shape_extractor::getShape(size_t i)
{
  std::vector<byte> ret;
  SEXP it = 0;
  tools::vectorGeneric geometry(m_shape);
  it = geometry.at(i);
  if (Rf_isNull(it))
  {
    return ret;
  }
  else
  {
    if (TYPEOF(it) == NILSXP || Rf_isNumeric(it))
      return ret;
    else
    {
      if (!tools::copy_to(it, ret))
        return showError<false>("unknown structure"), ret;
      return ret;
    }
  }
}
Esempio n. 10
0
File: mpc.c Progetto: rforge/mpc
SEXP R_mpc_add(SEXP e1, SEXP e2) {
	mpc_t *z1 = (mpc_t *)R_ExternalPtrAddr(e1);
	mpc_t *z = (mpc_t *)malloc(sizeof(mpc_t));
	if (z == NULL) {
		Rf_error("Could not allocate memory for MPC type.");
	}

	if (Rf_inherits(e2, "mpc")) {
		mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
		mpfr_prec_t real_prec, imag_prec;
		Rmpc_get_max_prec(&real_prec, &imag_prec, *z1, *z2);
		mpc_init3(*z, real_prec, imag_prec);
		mpc_add(*z, *z1, *z2, Rmpc_get_rounding());
	} else if (Rf_isInteger(e2)) {
		mpc_init2(*z, mpc_get_prec(*z1));
		mpc_add_ui(*z, *z1, INTEGER(e2)[0], Rmpc_get_rounding());
	} else if (Rf_isNumeric(e2)) {
		mpfr_t x;
		mpfr_init2(x, 53);
                // We use GMP_RNDN rather than MPFR_RNDN for compatibility
                // with mpfr 2.4.x and earlier as well as more modern versions.
		mpfr_set_d(x, REAL(e2)[0], GMP_RNDN);
		/* Max of mpc precision z2 and 53 from e2. */
		Rprintf("Precision: %d\n", mpc_get_prec(*z1));
		mpc_init2(*z, max(mpc_get_prec(*z1), 53));
		mpc_add_fr(*z, *z1, x, Rmpc_get_rounding());
	} else {
		/* TODO(mstokely): Add support for mpfr types here. */
		free(z);
		Rf_error("Invalid second operand for mpc addition.");
	}
	SEXP retVal = PROTECT(R_MakeExternalPtr((void *)z,
		Rf_install("mpc ptr"), R_NilValue));
	Rf_setAttrib(retVal, R_ClassSymbol, Rf_mkString("mpc"));
	R_RegisterCFinalizerEx(retVal, mpcFinalizer, TRUE);
	UNPROTECT(1);
	return retVal;
}
Esempio n. 11
0
File: mpc.c Progetto: rforge/mpc
SEXP R_mpc_sub(SEXP e1, SEXP e2) {
	mpc_t *z = (mpc_t *)malloc(sizeof(mpc_t));
	if (z == NULL) {
		Rf_error("Could not allocate memory for MPC type.");
	}

	if (Rf_inherits(e1, "mpc")) {
		Rprintf("It's an mpc");
		mpc_t *z1 = (mpc_t *)R_ExternalPtrAddr(e1);
		if (Rf_inherits(e2, "mpc")) {
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpc_init2(*z, max(mpc_get_prec(*z1),
				mpc_get_prec(*z2)));
			mpc_sub(*z, *z1, *z2, Rmpc_get_rounding());
		} else if (Rf_isInteger(e2)) {
			mpc_init2(*z, mpc_get_prec(*z1));
			mpc_sub_ui(*z, *z1, INTEGER(e2)[0],
			    Rmpc_get_rounding());
		} else if (Rf_isNumeric(e2)) {
			mpfr_t x;
			mpfr_init2(x, 53);
			mpfr_set_d(x, REAL(e2)[0], GMP_RNDN);
			Rprintf("Precision: %d\n", mpc_get_prec(*z1));
			mpc_init2(*z, max(mpc_get_prec(*z1), 53));
			mpc_sub_fr(*z, *z1, x, Rmpc_get_rounding());
		} else {
			Rf_error("Unsupported type for operand 2 of MPC subtraction.");
		}
	} else if (Rf_isInteger(e1)) {
		if (Rf_inherits(e2, "mpc")) {
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpc_init2(*z, mpc_get_prec(*z2));
			mpc_ui_sub(*z, INTEGER(e1)[0], *z2,
			    Rmpc_get_rounding());
		} else {
			Rf_error("Unsupported type for operands for MPC subtraction.");
		}
	} else if (Rf_isNumeric(e1)) {
		if (Rf_inherits(e2, "mpc")) {
			mpc_t *z2 = (mpc_t *)R_ExternalPtrAddr(e2);
			mpc_init2(*z, mpc_get_prec(*z2));
			mpfr_t x;
			mpfr_init2(x, 53);
			mpfr_set_d(x, REAL(e1)[0], GMP_RNDN);
			mpc_fr_sub(*z, x, *z2, Rmpc_get_rounding());
		} else {
			Rf_error("Unsupported type for operands for MPC subtraction.");
		}
	} else {
		/* TODO(mstokely): Add support for mpfr types here. */
		Rprintf("It's unknown");
		free(z);
		Rf_error("Invalid second operand for mpc subtraction.");
	}
	SEXP retVal = PROTECT(R_MakeExternalPtr((void *)z,
		Rf_install("mpc ptr"), R_NilValue));
	Rf_setAttrib(retVal, R_ClassSymbol, Rf_mkString("mpc"));
	R_RegisterCFinalizerEx(retVal, mpcFinalizer, TRUE);
	UNPROTECT(1);
	return retVal;
}
Esempio n. 12
0
char *nvimcom_browser_line(SEXP *x, const char *xname, const char *curenv, const char *prefix, char *p)
{
    char xclass[64];
    char newenv[512];
    char curenvB[512];
    char ebuf[64];
    char pre[128];
    char newpre[128];
    int len;
    const char *ename;
    SEXP listNames, label, lablab, eexp, elmt = R_NilValue;
    SEXP cmdSexp, cmdexpr, ans, cmdSexp2, cmdexpr2;
    ParseStatus status, status2;
    int er = 0;
    char buf[128];

    if(strlen(xname) > 64)
        return p;

    if(obbrbufzise < strlen(obbrbuf2) + 1024)
        p = nvimcom_grow_obbrbuf();

    p = nvimcom_strcat(p, prefix);
    if(Rf_isLogical(*x)){
        p = nvimcom_strcat(p, "%#");
        strcpy(xclass, "logical");
    } else if(Rf_isNumeric(*x)){
        p = nvimcom_strcat(p, "{#");
        strcpy(xclass, "numeric");
    } else if(Rf_isFactor(*x)){
        p = nvimcom_strcat(p, "'#");
        strcpy(xclass, "factor");
    } else if(Rf_isValidString(*x)){
        p = nvimcom_strcat(p, "\"#");
        strcpy(xclass, "character");
    } else if(Rf_isFunction(*x)){
        p = nvimcom_strcat(p, "(#");
        strcpy(xclass, "function");
    } else if(Rf_isFrame(*x)){
        p = nvimcom_strcat(p, "[#");
        strcpy(xclass, "data.frame");
    } else if(Rf_isNewList(*x)){
        p = nvimcom_strcat(p, "[#");
        strcpy(xclass, "list");
    } else if(Rf_isS4(*x)){
        p = nvimcom_strcat(p, "<#");
        strcpy(xclass, "s4");
    } else if(TYPEOF(*x) == PROMSXP){
        p = nvimcom_strcat(p, "&#");
        strcpy(xclass, "lazy");
    } else {
        p = nvimcom_strcat(p, "=#");
        strcpy(xclass, "other");
    }

    PROTECT(lablab = allocVector(STRSXP, 1));
    SET_STRING_ELT(lablab, 0, mkChar("label"));
    PROTECT(label = getAttrib(*x, lablab));
    p = nvimcom_strcat(p, xname);
    p = nvimcom_strcat(p, "\t");
    if(length(label) > 0){
        if(Rf_isValidString(label)){
            snprintf(buf, 127, "%s", CHAR(STRING_ELT(label, 0)));
            p = nvimcom_strcat(p, buf);
        } else {
            if(labelerr)
                p = nvimcom_strcat(p, "Error: label isn't \"character\".");
        }
    }
    p = nvimcom_strcat(p, "\n");
    UNPROTECT(2);

    if(strcmp(xclass, "list") == 0 || strcmp(xclass, "data.frame") == 0 || strcmp(xclass, "s4") == 0){
        strncpy(curenvB, curenv, 500);
        if(xname[0] == '[' && xname[1] == '['){
            curenvB[strlen(curenvB) - 1] = 0;
        }
        if(strcmp(xclass, "s4") == 0)
            snprintf(newenv, 500, "%s%s@", curenvB, xname);
        else
            snprintf(newenv, 500, "%s%s$", curenvB, xname);
        if((nvimcom_get_list_status(newenv, xclass) == 1)){
            len = strlen(prefix);
            if(nvimcom_is_utf8){
                int j = 0, i = 0;
                while(i < len){
                    if(prefix[i] == '\xe2'){
                        i += 3;
                        if(prefix[i-1] == '\x80' || prefix[i-1] == '\x94'){
                            pre[j] = ' '; j++;
                        } else {
                            pre[j] = '\xe2'; j++;
                            pre[j] = '\x94'; j++;
                            pre[j] = '\x82'; j++;
                        }
                    } else {
                        pre[j] = prefix[i];
                        i++, j++;
                    }
                }
                pre[j] = 0;
            } else {
                for(int i = 0; i < len; i++){
                    if(prefix[i] == '-' || prefix[i] == '`')
                        pre[i] = ' ';
                    else
                        pre[i] = prefix[i];
                }
                pre[len] = 0;
            }
            sprintf(newpre, "%s%s", pre, strT);

            if(strcmp(xclass, "s4") == 0){
                snprintf(buf, 127, "slotNames(%s%s)", curenvB, xname);
                PROTECT(cmdSexp = allocVector(STRSXP, 1));
                SET_STRING_ELT(cmdSexp, 0, mkChar(buf));
                PROTECT(cmdexpr = R_ParseVector(cmdSexp, -1, &status, R_NilValue));

                if (status != PARSE_OK) {
                    p = nvimcom_strcat(p, "nvimcom error: invalid value in slotNames(");
                    p = nvimcom_strcat(p, xname);
                    p = nvimcom_strcat(p, ")\n");
                } else {
                    PROTECT(ans = R_tryEval(VECTOR_ELT(cmdexpr, 0), R_GlobalEnv, &er));
                    if(er){
                        p = nvimcom_strcat(p, "nvimcom error: ");
                        p = nvimcom_strcat(p, xname);
                        p = nvimcom_strcat(p, "\n");
                    } else {
                        len = length(ans);
                        if(len > 0){
                            int len1 = len - 1;
                            for(int i = 0; i < len; i++){
                                ename = CHAR(STRING_ELT(ans, i));
                                snprintf(buf, 127, "%s%s@%s", curenvB, xname, ename);
                                PROTECT(cmdSexp2 = allocVector(STRSXP, 1));
                                SET_STRING_ELT(cmdSexp2, 0, mkChar(buf));
                                PROTECT(cmdexpr2 = R_ParseVector(cmdSexp2, -1, &status2, R_NilValue));
                                if (status2 != PARSE_OK) {
                                    p = nvimcom_strcat(p, "nvimcom error: invalid code \"");
                                    p = nvimcom_strcat(p, xname);
                                    p = nvimcom_strcat(p, "@");
                                    p = nvimcom_strcat(p, ename);
                                    p = nvimcom_strcat(p, "\"\n");
                                } else {
                                    PROTECT(elmt = R_tryEval(VECTOR_ELT(cmdexpr2, 0), R_GlobalEnv, &er));
                                    if(i == len1)
                                        sprintf(newpre, "%s%s", pre, strL);
                                    p = nvimcom_browser_line(&elmt, ename, newenv, newpre, p);
                                    UNPROTECT(1);
                                }
                                UNPROTECT(2);
                            }
                        }
                    }
                    UNPROTECT(1);
                }
                UNPROTECT(2);
            } else {
                PROTECT(listNames = getAttrib(*x, R_NamesSymbol));
                len = length(listNames);
                if(len == 0){ /* Empty list? */
                    int len1 = length(*x);
                    if(len1 > 0){ /* List without names */
                        len1 -= 1;
                        for(int i = 0; i < len1; i++){
                            sprintf(ebuf, "[[%d]]", i + 1);
                            elmt = VECTOR_ELT(*x, i);
                            p = nvimcom_browser_line(&elmt, ebuf, newenv, newpre, p);
                        }
                        sprintf(newpre, "%s%s", pre, strL);
                        sprintf(ebuf, "[[%d]]", len1 + 1);
                        PROTECT(elmt = VECTOR_ELT(*x, len));
                        p = nvimcom_browser_line(&elmt, ebuf, newenv, newpre, p);
                        UNPROTECT(1);
                    }
                } else { /* Named list */
                    len -= 1;
                    for(int i = 0; i < len; i++){
                        PROTECT(eexp = STRING_ELT(listNames, i));
                        ename = CHAR(eexp);
                        UNPROTECT(1);
                        if(ename[0] == 0){
                            sprintf(ebuf, "[[%d]]", i + 1);
                            ename = ebuf;
                        }
                        PROTECT(elmt = VECTOR_ELT(*x, i));
                        p = nvimcom_browser_line(&elmt, ename, newenv, newpre, p);
                        UNPROTECT(1);
                    }
                    sprintf(newpre, "%s%s", pre, strL);
                    ename = CHAR(STRING_ELT(listNames, len));
                    if(ename[0] == 0){
                        sprintf(ebuf, "[[%d]]", len + 1);
                        ename = ebuf;
                    }
                    PROTECT(elmt = VECTOR_ELT(*x, len));
                    p = nvimcom_browser_line(&elmt, ename, newenv, newpre, p);
                    UNPROTECT(1);
                }
                UNPROTECT(1); /* listNames */
            }
        }
    }
    return p;
}
Esempio n. 13
0
long shape_extractor::at(size_t i, IGeometry **ppNewGeom)
{
  if (m_gt == esriGeometryNull)
    return S_FALSE;

  CComQIPtr<IGeometry> ipNewShape;
  if (m_gt == esriGeometryPoint)
  {
    HRESULT hr = newShape(m_gt, m_ipSR, m_hasZ, m_hasM, &ipNewShape);
    if (hr != S_OK)
      return showError<true>(L"create new geometry failed"), hr;
    CComQIPtr<IPoint> ipPoint(ipNewShape);

    double x, y, z, m;
    if (m_as_matrix)
    {
      ATLASSERT(Rf_isMatrix(m_shape));
      size_t r = m_len;//INTEGER(dims)[0];
      x = REAL(m_shape)[i];
      y = REAL(m_shape)[i + r];
      if (m_hasZ || m_hasM)
      {
        m = z = REAL(m_shape)[i + (r*2)];
        if (m_hasZ && m_hasM)
          m = REAL(m_shape)[i + (r*3)];
      }
    }
    else
    {
      x = REAL(m_parts[0])[i];
      y = REAL(m_parts[1])[i];
      if (m_hasZ || m_hasM)
      {
        double z, m;
        m = z = REAL(m_parts[2])[i];
        if (m_hasZ && m_hasM)
          m = REAL(m_parts[3])[i];
      }
    }
    ipPoint->PutCoords(x, y);
    if (m_hasZ) ipPoint->put_Z(z);
    if (m_hasM) ipPoint->put_M(m);

    return ipNewShape.CopyTo(ppNewGeom);
  }

  SEXP it = 0;
  tools::vectorGeneric geometry(m_shape);
  HRESULT hr = newShape(m_gt, m_ipSR, false, false, &ipNewShape);
  if (hr != S_OK)
    return showError<true>(L"create new geometry failed"), hr;

  it = geometry.at(i);
  if (Rf_isNull(it))
  {
    ipNewShape->SetEmpty();
  }
  else
  {
    HRESULT hr = S_FALSE;
    if (TYPEOF(it) == NILSXP || Rf_isNumeric(it))
      hr = ipNewShape->SetEmpty();
    else
    {
      std::vector<BYTE> buff;
      if (!tools::copy_to(it, buff))
        return showError<false>(L"unknown structure"), E_FAIL;
      CComQIPtr<IESRIShape2> ipShape(ipNewShape);
      long buffSize = (long)buff.size();
      hr = ipShape->ImportFromESRIShapeEx(esriShapeImportNoSwap | esriShapeImportNonTrusted, &buffSize, &buff[0]);
    }
    if (hr != S_OK)
      return showError<true>(L"create new geometry"), hr;
  }
  return ipNewShape.CopyTo(ppNewGeom);
}