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lammps/lib/atc/Array2D.h
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Array2D.h
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#ifndef ARRAY2D_H
#define ARRAY2D_H
#include <string>
#include <iostream>
#include <cstdio>
template<typename T>
class Array2D {
public:
Array2D();
Array2D(int nrows, int ncols);
Array2D(const Array2D<T>& A); // copy constructor
~Array2D();
// Resize and reinitalize matrix
void reset(int nrows, int ncols);
// Access method to get the (i,j) element:
T& operator() (int i, int j);
// Access method to get the (i,j) element:
const T& operator() (int i, int j) const;
// Copy operator
Array2D<T>& operator= (const Array2D<T>& other);
// assignment operator
Array2D<T>& operator= (const T other);
// Get size of Array2D
int nRows() const;
int nCols() const;
// Do I have this element?
bool has_member(T val) const;
// print
void print(std::string name ="") const;
// Dump templated type to disk; operation not safe for all types
void write_restart(FILE *f) const;
private:
int nrows_, ncols_;
T *data_;
};
template<typename T>
Array2D<T>::Array2D() {
nrows_ = 0;
ncols_ = 0;
data_ = NULL;
}
template<typename T>
Array2D<T>::Array2D(int nrows, int ncols) {
nrows_ = nrows;
ncols_ = ncols;
data_ = new T[nrows_ * ncols_];
}
template<typename T>
Array2D<T>::Array2D(const Array2D<T>& A) {
nrows_ = A.nrows_;
ncols_ = A.ncols_;
if (A.data_==NULL)
data_ = NULL;
else {
data_ = new T[nrows_ * ncols_];
for(int i=0;i<nrows_*ncols_;i++)
data_[i] = A.data_[i];
}
}
template<typename T>
void Array2D<T>::reset(int nrows, int ncols) {
if (nrows_ == nrows && ncols_ == ncols) { // no size change; don't realloc memory
return;
}
else { // size changed; realloc memory
nrows_ = nrows;
ncols_ = ncols;
if (data_ != NULL)
delete [] data_;
if (ncols_ > 0 && nrows_ > 0)
data_ = new T[nrows_ * ncols_];
else {
data_ = NULL;
nrows_ = 0;
ncols_ = 0;
}
}
}
template<typename T>
T& Array2D<T>::operator() (int row, int col) {
// Array bounds checking
return data_[col*nrows_ + row];
}
template<typename T>
const T& Array2D<T>::operator() (int row, int col) const {
// Array bounds checking
return data_[col*nrows_ + row];
}
template<typename T>
Array2D<T>& Array2D<T>::operator= (const Array2D<T>& other) {
if (data_ == NULL) { // initialize my internal storage to match LHS
nrows_ = other.nrows_;
ncols_ = other.ncols_;
if (other.data_==NULL)
data_ = NULL;
else
data_ = new T[nrows_ * ncols_];
}
for(int i=0;i<nrows_*ncols_;i++)
data_[i] = other.data_[i];
return *this;
}
template<typename T>
Array2D<T>& Array2D<T>::operator= (const T other) {
for(int i=0;i<nrows_*ncols_;i++)
data_[i] = other;
return *this;
}
template<typename T>
int Array2D<T>::nRows() const {
return nrows_;
}
template<typename T>
int Array2D<T>::nCols() const {
return ncols_;
}
template<typename T>
bool Array2D<T>::has_member(T val) const {
int i;
bool retval = false;
for(i=0;i<nrows_*ncols_;i++)
if (val == data_[i])
retval = true;
return(retval);
}
template<typename T>
void Array2D<T>::write_restart(FILE *f) const {
fwrite(&nrows_,sizeof(int),1,f);
fwrite(&ncols_,sizeof(int),1,f);
if (nrows_*ncols_ > 0)
fwrite(data_,sizeof(T),nrows_*ncols_,f);
}
template<typename T>
Array2D<T>::~Array2D() {
if (data_ != NULL)
delete[] data_;
}
template<typename T>
void Array2D<T>::print(std::string name) const {
std::cout << "------- Begin "<<name<<" -----------------\n";
if (data_ != NULL) {
for(int col=0;col<ncols_;col++) {
for(int row=0;row<nrows_;row++) {
std::cout << data_[col*nrows_ + row] << " ";
}
std::cout << "\n";
}
}
std::cout << "\n------- End "<<name<<" -------------------\n";
}
#endif // Array2D.h
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