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Array.h
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Fri, Mar 7, 03:33

Array.h
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#ifndef ARRAY_H
#define ARRAY_H
#include <cstdlib>
#include <iostream>
#include <string>
#include <stdio.h>
// for macros
#include "MatrixDef.h"
namespace ATC_matrix {
/**
* @class Array
* @brief Base class for creating, sizing and operating on 1-D arrays of data
*/
template<typename T>
class Array {
public:
Array();
Array(int len);
Array(const Array<T>& A);
virtual ~Array();
// Resize and reinitialize the array
virtual void reset(int len);
//* resizes the matrix, copy what fits default to OFF
virtual void resize(int len, bool copy=false);
// Access method to get the element i:
T& operator() (int i);
const T& operator() (int i) const;
// Assignment
virtual Array<T>& operator= (const Array<T> &other);
virtual Array<T>& operator= (const T &value);
// Get length of array
int size() const;
// Do I have this element?
bool has_member(T val) const;
// range
bool check_range(T min, T max) const;
void range(T & min, T & max) const;
// search an ordered array
int index(T& val) const;
// Return pointer to internal data
const T* data() const;
T* ptr() 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;
protected:
int len_;
T *data_;
};
template<typename T>
class AliasArray {
public:
AliasArray();
AliasArray(const Array<T>& A);
AliasArray(const AliasArray<T>& A);
AliasArray(int len, T * A);
virtual ~AliasArray();
virtual AliasArray<T>& operator= (const Array<T> &other);
virtual AliasArray<T>& operator= (const T &value);
const T& operator() (int i) const;
int size() const;
T* ptr() const;
protected:
int len_;
T *data_;
};
template<typename T>
Array<T>::Array(void) {
len_ = 0;
data_ = NULL;
}
template<typename T>
Array<T>::Array(int len) {
len_ = len;
data_ = new T[len_];
}
template<typename T>
Array<T>::Array(const Array<T>& A) {
len_ = A.len_;
if (A.data_==NULL)
data_ = NULL;
else {
data_ = new T[len_];
for(int i=0;i<len_;i++)
data_[i] = A.data_[i];
}
}
template<typename T>
Array<T>::~Array() {
if (data_ != NULL) delete[] data_;
}
template<typename T>
void Array<T>::reset(int len) {
if (len_ == len) { // no size change; don't realloc memory
return;
}
else { // size change, realloc memory
len_ = len;
if (data_ != NULL)
delete[] data_;
if (len_ > 0)
data_ = new T[len_];
else {
data_ = NULL;
len_ = 0;
}
}
}
template<typename T>
void Array<T>::resize(int len, bool copy) {
if (len_ == len) { // no size change; don't realloc memory
return;
}
else { // size change, realloc memory
len_ = len;
if (len_ > 0) {
if (copy && data_ != NULL) {
Array<T> temp(*this);
delete[] data_;
data_ = new T[len_];
for (int i = 0 ; i < len_; i++) {
if (i < temp.size())
data_[i] = temp.data_[i];
}
}
else {
if (data_ != NULL) delete[] data_;
data_ = new T[len_];
}
}
else {
data_ = NULL;
len_ = 0;
}
}
}
template<typename T>
T& Array<T>::operator() (int i) {
return data_[i];
}
template<typename T>
Array<T>& Array<T>::operator= (const Array<T> &other) {
if (data_ == NULL) { // initialize my internal storage to match LHS
len_ = other.len_;
if (other.data_==NULL)
data_ = NULL;
else
data_ = new T[len_];
}
for(int i=0;i<len_;i++)
data_[i] = other.data_[i];
return *this;
}
template<typename T>
Array<T>& Array<T>::operator= (const T &value) {
for(int i=0;i<len_;i++) data_[i] = value;
return *this;
}
template<typename T>
const T& Array<T>::operator() (int i) const {
return data_[i];
}
template<typename T>
int Array<T>::size(void) const {
return len_;
}
template<typename T>
bool Array<T>::has_member(T val) const {
int i;
bool retval = false;
for(i=0;i<len_;i++)
if (val == data_[i])
retval = true;
return(retval);
}
template<typename T>
bool Array<T>::check_range(T min, T max) const {
int i;
for(i=0;i<len_;i++) {
T val = data_[i];
if (val > max) return false;
else if (val < min) return false;
}
return true;
}
template<typename T>
void Array<T>::range(T& min, T& max) const {
int i;
min = max = data_[0];
for(i=1;i<len_;i++) {
T val = data_[i];
if (val > max) max = val;
else if (val < min) min = val;
}
}
template<typename T>
int Array<T>::index(T& val) const {
int idx = -1;
int i;
for(i=0;i<len_;i++) {
T x = data_[i];
if (val <= x) return idx;
idx++;
}
return idx;
}
template<typename T>
void Array<T>::write_restart(FILE *f) const {
fwrite(&len_,sizeof(int),1,f);
if (len_ > 0)
fwrite(data_,sizeof(T),len_,f);
}
template<typename T>
const T* Array<T>::data() const {
return data_;
}
template<typename T>
T* Array<T>::ptr() const {
return data_;
}
template<typename T>
void Array<T>::print(std::string name) const {
std::cout << "------- Begin "<<name<<" -----------------\n";
if (data_ != NULL) {
for(int i=0;i<len_;i++) std::cout << data_[i] << " ";
std::cout << "\n";
}
std::cout << "\n------- End "<<name<<" -------------------\n";
}
template<typename T>
AliasArray<T>::AliasArray(void) {
}
template<typename T>
AliasArray<T>::AliasArray(const AliasArray<T> & other) {
len_ = other.size();
data_ = other.ptr();
}
// for a mem continguous slice
template<typename T>
AliasArray<T>::AliasArray(int len, T * ptr) {
len_ = len;
data_ = ptr;
}
template<typename T>
AliasArray<T>::AliasArray(const Array<T>& A) {
len_ = A.len_;
data_ = A.ptr();
}
template<typename T>
AliasArray<T>::~AliasArray(void) {
len_ = 0;
data_ = NULL; // trick base class into not deleting parent data
}
template<typename T>
AliasArray<T>& AliasArray<T>::operator= (const Array<T> &other) {
len_ = other.size();
data_ = other.ptr();
return *this;
}
template<typename T>
AliasArray<T>& AliasArray<T>::operator= (const T &value) {
for(int i=0;i < len_;i++)
data_[i] = value;
return *this;
}
template<typename T>
const T& AliasArray<T>::operator() (int i) const {
return data_[i];
}
template<typename T>
int AliasArray<T>::size(void) const {
return len_;
}
template<typename T>
T* AliasArray<T>::ptr() const {
return data_;
}
} // end namespace
#endif // Array.h

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