/* EXPORT->CreateDVector: Allocate space for double vector v[1..size] */
DVector CreateDVector(MemHeap *x, int size)
{
DVector v;
int *i;
v = (DVector)New(x,DVectorElemSize(size));
i = (int *) v; *i = size;
return v;
}
/* EXPORT->CreateDTriMat: Allocate space for double matrix m[1..size][1..i] */
DTriMat CreateDTriMat(MemHeap *x,int size)
{
int *i,j;
DVector *m;
char *p;
p = (char *) New(x,DTriMatElemSize(size));
i = (int *)p; *i = size;
m = (DVector *)p;
p += (size+1)*sizeof(DVector);
for (j=1;j<=size; j++) {
i = (int *) p; *i = j;
m[j] = (DVector) p; p += DVectorElemSize(j);
}
return m;
}
/* EXPORT->CreateDMatrix: Allocate space for double matrix m[1..nrows][1..ncols] */
DMatrix CreateDMatrix(MemHeap *x, int nrows,int ncols)
{
size_t vsize;
int *i,j;
DVector *m;
char *p;
p = (char *) New(x,DMatrixElemSize(nrows,ncols));
i = (int *) p; *i = nrows;
vsize = DVectorElemSize(ncols);
m = (DVector *) p;
p += MRound((nrows+1)*sizeof(DVector));
for (j=1; j<=nrows; j++, p += vsize) {
i = (int *) p; *i = ncols;
m[j] = (DVector) p;
}
return m;
}
size_t DMatrixElemSize(int nrows,int ncols)
{
return MRound(DVectorElemSize(ncols) * nrows + (nrows+1)*sizeof(DVector));
}
size_t DTriMatElemSize(int size)
{
return size*(DVectorElemSize(0)*2 + (size+1)*sizeof(double))/2
+ (size+1)*sizeof(DVector);
}
