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/*
* Copyright (c) 2009 Samit Basu
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __GetSet_hpp__
#define __GetSet_hpp__
#include "IndexArray.hpp"
template <typename T>
void SetSlice(T& arg, const IndexArrayVector& index, const T& data) {
index_t offset = getSliceIndex(arg.dimensions(),index);
for (index_t i=1;i<=arg.dimensions()[0];i++)
arg.set(offset+i,data.get(i));
}
template <typename T, typename S>
void SetSlice(T& arg, const IndexArrayVector& index, const S& data) {
index_t offset = getSliceIndex(arg.dimensions(),index);
for (index_t i=1;i<=arg.dimensions()[0];i++)
arg.set(offset+i,data);
}
template <typename T>
void Set(T& arg, const IndexArray& index, const T& data) {
if (index.isEmpty()) return;
if (data.isEmpty()) {
arg.del(index);
return;
}
if (IsColonOp(index)) {
NTuple myDims;
if (!arg.isEmpty())
myDims = arg.dimensions();
else
myDims = data.dimensions();
if (myDims.count() != data.length())
throw Exception("assignment A(:) = B requires A and B to be the same size");
T retvec(data);
retvec.reshape(myDims);
arg = retvec;
return;
}
index_t max_ndx = MaxValue(index);
if (max_ndx > arg.length()) arg.resize(max_ndx);
if (index.length() != data.length())
throw Exception("Assignment A(I) = B requires I and B to be the same size");
for (index_t i=1;i<=index.length();i++)
arg.set(index.get(i),data.get(i));
}
template <typename T>
void Set(T& arg, const IndexArrayVector& index, const T& data) {
if (index.empty()) return;
if (data.isEmpty()) {
arg.del(index);
return;
}
if (!arg.isEmpty() && isSliceIndexCase(arg.dimensions(),index)) {
SetSlice(arg,index,data);
return;
}
IndexArrayVector ndx;
NTuple secdims;
NTuple maxsze;
if (arg.isEmpty()) {
// Special case when A(NDX) = B, and A is empty
if (data.isVector()) {
bool firstcolon = true;
for (int i=0;i<index.size();i++)
if (IsColonOp(index[i])) {
if (firstcolon) {
ndx.push_back(ExpandColons(index[i],data.length()));
firstcolon = false;
} else
ndx.push_back(ScalarToIndex(1));
} else {
ndx.push_back(index[i]);
}
} else {
// Correction -
// In the assignment of the form:
// g(2,:,4,:) = fs;
// we fill in the colons with the first and second dimensional sizes of fs
int colonDim = 0;
for (int i=0;i<index.size();i++) {
if (IsColonOp(index[i]))
ndx.push_back(ExpandColons(index[i],data.dimensions()[colonDim++]));
else
ndx.push_back(index[i]);
}
}
for (int i=0;i<ndx.size();i++) {
secdims[i] = ndx[i].length();
maxsze[i] = MaxValue(ndx[i]);
}
} else {
for (int i=0;i<index.size();i++) {
ndx.push_back(ExpandColons(index[i],arg.dimensions()[i]));
secdims[i] = ndx[i].length();
maxsze[i] = MaxValue(ndx[i]);
}
}
if (secdims.count() != data.length())
throw Exception("mismatch in size for assignment A(I1,I2,...) = B");
if (!(maxsze <= arg.dimensions()))
arg.resize(max(arg.dimensions(),maxsze));
NTuple pos(1,1);
index_t j=1;
while (pos <= secdims) {
NTuple qp;
for (int i=0;i<index.size();i++)
qp[i] = ndx[i].get(pos[i]);
arg.set(qp,data.get(j++));
secdims.increment(pos);
}
}
template <typename T, typename S>
void Set(T& arg, const IndexArrayVector& index, const S& data) {
if (index.empty()) return;
if (!arg.isEmpty() && isSliceIndexCase(arg.dimensions(),index)) {
SetSlice(arg,index,data);
return;
}
IndexArrayVector ndx;
NTuple secdims;
NTuple maxsze;
for (int i=0;i<index.size();i++) {
if (arg.isEmpty())
ndx.push_back(ExpandColons(index[i],1));
else
ndx.push_back(ExpandColons(index[i],arg.dimensions()[i]));
secdims[i] = ndx[i].length();
maxsze[i] = MaxValue(ndx[i]);
}
if (!(maxsze <= arg.dimensions()))
arg.resize(max(arg.dimensions(),maxsze));
NTuple pos(1,1);
while (pos <= secdims) {
NTuple qp;
for (int i=0;i<index.size();i++)
qp[i] = ndx[i].get(pos[i]);
arg.set(qp,data);
secdims.increment(pos);
}
}
template <typename T, typename S>
void Set(T& arg, const IndexArray& index, const S& data) {
if (index.isEmpty()) return;
if (IsColonOp(index)) {
if (arg.isEmpty())
arg.set(1,data);
else
for (index_t i=1;i<=arg.length();i++)
arg.set(i,data);
return;
}
index_t max_ndx = MaxValue(index);
if (max_ndx > arg.length()) arg.resize(max_ndx);
for (index_t i=1;i<=index.length();i++)
arg.set(index.get(i),data);
}
template <typename T>
const T Get(const T& arg, const IndexArray& index) {
if (index.isEmpty()) return T(index.dimensions());
if (IsColonOp(index)) {
T retvec(arg);
retvec.reshape(NTuple(arg.length(),1));
return retvec;
}
if (arg.isEmpty())
throw Exception("Cannot index into empty variable,");
NTuple retdims;
if (arg.isColumnVector() && index.isRowVector())
retdims = NTuple(index.length(),1);
else
retdims = index.dimensions();
T retvec(retdims);
for (index_t i=1;i<=retvec.length();i++)
retvec.set(i,arg.get(index.get(i)));
return retvec;
}
template <typename T>
const T Get(const T& arg, const IndexArrayVector& index) {
if (index.empty()) return T(NTuple(0,0));
if (isSliceIndexCase(arg.dimensions(),index)) return arg.slice(index);
IndexArrayVector ndx;
NTuple outdims;
for (int i=0;i<index.size();i++) {
ndx.push_back(ExpandColons(index[i],arg.dimensions()[i]));
outdims[i] = ndx[i].length();
}
T retval(outdims);
NTuple pos(1,1);
while (pos <= outdims) {
NTuple qp;
for (int i=0;i<index.size();i++)
qp[i] = ndx[i].get(pos[i]);
retval.set(pos,arg.get(qp));
outdims.increment(pos);
}
return retval;
}
#endif
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