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/* matrix.c: Matrix operations
Copyright 2003, 2005 Bjoern Butscher, Hendrik Weimer
This file is part of libquantum
libquantum is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
libquantum is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with libquantum; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "matrix.h"
#include "config.h"
#include "complex.h"
#include "error.h"
/* Statistics of the memory consumption */
unsigned long quantum_memman(long change)
{
static long mem = 0, max = 0;
mem += change;
if(mem > max)
max = mem;
return mem;
}
/* Create a new COLS x ROWS matrix */
quantum_matrix
quantum_new_matrix(int cols, int rows)
{
quantum_matrix m;
m.rows = rows;
m.cols = cols;
m.t = calloc(cols * rows, sizeof(COMPLEX_FLOAT));
#if (DEBUG_MEM)
printf("allocating %i bytes of memory for %ix%i matrix at 0x%X\n",
sizeof(COMPLEX_FLOAT) * cols * rows, cols, rows, (int) m.t);
#endif
if(!m.t)
quantum_error(QUANTUM_ENOMEM);
quantum_memman(sizeof(COMPLEX_FLOAT) * cols * rows);
return m;
}
/* Delete a matrix */
void
quantum_delete_matrix(quantum_matrix *m)
{
#if (DEBUG_MEM)
printf("freeing %i bytes of memory for %ix%i matrix at 0x%X\n",
sizeof(COMPLEX_FLOAT) * m->cols * m->rows, m->cols, m->rows,
(int) m->t);
#endif
free(m->t);
quantum_memman(-sizeof(COMPLEX_FLOAT) * m->cols * m->rows);
m->t=0;
}
/* Print the contents of a matrix to stdout */
void
quantum_print_matrix(quantum_matrix m)
{
int i, j, z=0;
/* int l; */
while ((1 << z++) < m.rows);
z--;
for(i=0; i<m.rows; i++)
{
/* for (l=z-1; l>=0; l--)
{
if ((l % 4 == 3))
printf(" ");
printf("%i", (i >> l) & 1);
} */
for(j=0; j<m.cols; j++)
printf("%g %+gi ", quantum_real(M(m, j, i)),
quantum_imag(M(m, j, i)));
printf("\n");
}
printf("\n");
}
/* Matrix multiplication */
quantum_matrix quantum_mmult(quantum_matrix A, quantum_matrix B)
{
int i, j, k;
quantum_matrix C;
if(A.cols != B.rows)
quantum_error(QUANTUM_EMSIZE);
C = quantum_new_matrix(B.cols, A.rows);
for(i=0; i<B.cols; i++)
{
for(j=0; j<A.rows; j++)
{
for(k=0; k<B.rows; k++)
M(C, i, j) += M(A, k, j) * M(B, i, k);
}
}
return C;
}
/* Compute the adjoint of a matrix */
void
quantum_adjoint(quantum_matrix *m)
{
int i, j;
COMPLEX_FLOAT tmp;
quantum_matrix A = *m;
for(i=0; i<m->cols; i++)
{
for(j=0;j<i;j++)
{
tmp = M(A, i, j);
M(A, i, j) = quantum_conj(M(A, j, i));
M(A, j, i) = quantum_conj(tmp);
}
}
}
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