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/* routines from the section 8 of tutorial.txt */
#include "matrix.h"
#define M3D_LIST 3 /* list number */
#define TYPE_MAT3D 0 /* the number of a type */
/* type for 3 dimensional matrices */
typedef struct {
int l,m,n; /* actual dimensions */
int max_l, max_m, max_n; /* maximal dimensions */
Real ***me; /* pointer to matrix elements */
/* we do not consider segmented memory */
Real *base, **me2d; /* me and me2d are additional pointers
to base */
} MAT3D;
/* function for creating a variable of MAT3D type */
MAT3D *m3d_get(l,m,n)
int l,m,n;
{
MAT3D *mat;
int i,j,k;
/* check if arguments are positive */
if (l <= 0 || m <= 0 || n <= 0)
error(E_NEG,"m3d_get");
/* new structure */
if ((mat = NEW(MAT3D)) == (MAT3D *)NULL)
error(E_MEM,"m3d_get");
else if (mem_info_is_on()) {
/* record how many bytes is allocated */
mem_bytes_list(TYPE_MAT3D,0,sizeof(MAT3D),M3D_LIST);
/* record a new allocated variable */
mem_numvar_list(TYPE_MAT3D,1,M3D_LIST);
}
mat->l = mat->max_l = l;
mat->m = mat->max_m = m;
mat->n = mat->max_n = n;
/* allocate memory for 3D array */
if ((mat->base = NEW_A(l*m*n,Real)) == (Real *)NULL)
error(E_MEM,"m3d_get");
else if (mem_info_is_on())
mem_bytes_list(TYPE_MAT3D,0,l*m*n*sizeof(Real),M3D_LIST);
/* allocate memory for 2D pointers */
if ((mat->me2d = NEW_A(l*m,Real *)) == (Real **)NULL)
error(E_MEM,"m3d_get");
else if (mem_info_is_on())
mem_bytes_list(TYPE_MAT3D,0,l*m*sizeof(Real *),M3D_LIST);
/* allocate memory for 1D pointers */
if ((mat->me = NEW_A(l,Real **)) == (Real ***)NULL)
error(E_MEM,"m3d_get");
else if (mem_info_is_on())
mem_bytes_list(TYPE_MAT3D,0,l*sizeof(Real **),M3D_LIST);
/* pointers to 2D matrices */
for (i=0,k=0; i < l; i++)
for (j=0; j < m; j++)
mat->me2d[k++] = &mat->base[(i*m+j)*n];
/* pointers to rows */
for (i=0; i < l; i++)
mat->me[i] = &mat->me2d[i*m];
return mat;
}
/* deallocate a variable of type MAT3D */
int m3d_free(mat)
MAT3D *mat;
{
/* do not try to deallocate the NULL pointer */
if (mat == (MAT3D *)NULL)
return -1;
/* first deallocate base */
if (mat->base != (Real *)NULL) {
if (mem_info_is_on())
/* record how many bytes is deallocated */
mem_bytes_list(TYPE_MAT3D,mat->max_l*mat->max_m*mat->max_n*sizeof(Real),
0,M3D_LIST);
free((char *)mat->base);
}
/* deallocate array of 2D pointers */
if (mat->me2d != (Real **)NULL) {
if (mem_info_is_on())
/* record how many bytes is deallocated */
mem_bytes_list(TYPE_MAT3D,mat->max_l*mat->max_m*sizeof(Real *),
0,M3D_LIST);
free((char *)mat->me2d);
}
/* deallocate array of 1D pointers */
if (mat->me != (Real ***)NULL) {
if (mem_info_is_on())
/* record how many bytes is deallocated */
mem_bytes_list(TYPE_MAT3D,mat->max_l*sizeof(Real **),0,M3D_LIST);
free((char *)mat->me);
}
/* deallocate MAT3D structure */
if (mem_info_is_on()) {
mem_bytes_list(TYPE_MAT3D,sizeof(MAT3D),0,M3D_LIST);
mem_numvar_list(TYPE_MAT3D,-1,M3D_LIST);
}
free((char *)mat);
return 0;
}
/*=============================================*/
char *m3d_names[] = {
"MAT3D"
};
#define M3D_NUM (sizeof(m3d_names)/sizeof(*m3d_names))
int (*m3d_free_funcs[M3D_NUM])() = {
m3d_free
};
static MEM_ARRAY m3d_sum[M3D_NUM];
/* test routing for allocating/deallocating static variables */
void test_stat(k)
int k;
{
static MAT3D *work;
if (!work) {
work = m3d_get(10,10,10);
mem_stat_reg_list((void **)&work,TYPE_MAT3D,M3D_LIST);
work->me[9][9][9] = -3.14;
}
if (k == 9)
printf(" work[9][9][9] = %g\n",work->me[9][9][9]);
}
void main()
{
MAT3D *M;
int i,j,k;
mem_info_on(TRUE);
/* can be the first command */
mem_attach_list(M3D_LIST,M3D_NUM,m3d_names,m3d_free_funcs,m3d_sum);
M = m3d_get(3,4,5);
mem_info_file(stdout,M3D_LIST);
/* make use of M->me[i][j][k], where i,j,k are non-negative and
i < 3, j < 4, k < 5 */
mem_stat_mark(1);
for (i=0; i < 3; i++)
for (j=0; j < 4; j++)
for (k=0; k < 5; k++) {
test_stat(i+j+k);
M->me[i][j][k] = i+j+k;
}
mem_stat_free_list(1,M3D_LIST);
mem_info_file(stdout,M3D_LIST);
printf(" M[%d][%d][%d] = %g\n",2,3,4,M->me[2][3][4]);
mem_stat_mark(2);
test_stat(9);
mem_stat_free_list(2,M3D_LIST);
m3d_free(M); /* if M is not necessary */
mem_info_file(stdout,M3D_LIST);
}
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