jiri/LA_library
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jiri
2005-02-14 00:10:07 +00:00
parent ac8afe89ad
commit 6150e1b9c6
14 changed files with 513 additions and 62 deletions
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21
smat.h
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@@ -3,6 +3,7 @@
#include "vec.h"
#include "mat.h"
#include "la_traits.h"
#define NN2 (nn*(nn+1)/2)
template <class T>
@@ -25,6 +26,8 @@ public:
NRSMat & operator|=(const NRSMat &rhs); //assignment to a new copy
NRSMat & operator=(const NRSMat &rhs); //assignment
NRSMat & operator=(const T &a); //assign a to diagonal
const bool operator!=(const NRSMat &rhs) const {if(nn!=rhs.nn) return 1; return(memcmp(v,rhs.v,NN2*sizeof(T)));}
const bool operator==(const NRSMat &rhs) const {return !(*this != rhs);};
inline NRSMat & operator*=(const T &a);
inline NRSMat & operator+=(const T &a);
inline NRSMat & operator-=(const T &a);
@@ -54,6 +57,8 @@ public:
void axpy(const T alpha, const NRSMat &x); // this+= a*x
inline const T amax() const;
const T trace() const;
void get(int fd, bool dimensions=1);
void put(int fd, bool dimensions=1) const;
void copyonwrite();
void resize(const int n);
inline operator T*(); //get a pointer to the data
@@ -396,15 +401,29 @@ template <typename T>
void NRSMat<T>::resize(const int n)
{
#ifdef DEBUG
if (n <= 0) laerror("illegal matrix dimension in resize of Smat");
if (n < 0) laerror("illegal matrix dimension in resize of Smat");
#endif
if (count)
{
if(n==0)
{
if(--(*count) <= 0) {
if(v) delete[] (v);
delete count;
}
count=0;
nn=0;
v=0;
return;
}
if(*count > 1) { //detach from previous
(*count)--;
count = 0;
v = 0;
nn = 0;
}
}
if (!count) { //new uninitialized vector or just detached
count = new int;
*count = 1;