1 /* xbt_matrix_t management functions */
3 /* Copyright (c) 2006-2014. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
10 #include "xbt/sysdep.h"
12 #include "xbt/matrix.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_matrix, xbt, "2D data storage");
16 /** \brief constructor */
17 xbt_matrix_t xbt_matrix_new(int lines, int rows, const unsigned long elmsize, void_f_pvoid_t const free_f)
19 xbt_matrix_t res = xbt_new(s_xbt_matrix_t, 1);
22 res->elmsize = elmsize;
24 res->data = xbt_malloc(elmsize * lines * rows);
28 /** \brief Creates a matrix being a submatrix of another one */
29 xbt_matrix_t xbt_matrix_new_sub(xbt_matrix_t from, int lsize, int rsize, int lpos, int rpos,
30 pvoid_f_pvoid_t const cpy_f)
32 xbt_matrix_t res = xbt_matrix_new(lsize, rsize, from->elmsize, from->free_f);
33 xbt_matrix_copy_values(res, from, lsize, rsize, 0, 0, lpos, rpos, cpy_f);
37 /** \brief destructor */
38 void xbt_matrix_free(xbt_matrix_t mat)
43 for (i = 0; i < (mat->lines * mat->rows); i++) {
44 mat->free_f((void *) &(mat->data[i * mat->elmsize]));
52 /** \brief Freeing function for containers of xbt_matrix_t */
53 void xbt_matrix_free_voidp(void *d)
55 xbt_matrix_free((xbt_matrix_t) * (void **) d);
58 /** \brief Display the content of a matrix (debugging purpose)
59 * \param coords: boolean indicating whether we should add the coords of each cell to the output*/
60 void xbt_matrix_dump(xbt_matrix_t matrix, const char *name, int coords, void_f_pvoid_t display_fun)
64 fprintf(stderr, ">>> Matrix %s dump (%u x %u)\n", name, matrix->lines, matrix->rows);
65 for (i = 0; i < matrix->lines; i++) {
67 for (j = 0; j < matrix->rows; j++) {
69 fprintf(stderr, " (%u,%u)=", i, j);
72 display_fun(xbt_matrix_get_ptr(matrix, i, j));
74 fprintf(stderr, "\n");
76 fprintf(stderr, "<<< end_of_matrix %s dump\n", name);
79 void xbt_matrix_dump_display_double(void *d)
81 fprintf(stderr, "%.2f", *(double *) d);
84 /** \brief Copy the values from the matrix src into the matrix dst
85 * \param dest: destination
87 * \param lsize: number of lines to copy
88 * \param rsize: number of rows to copy
89 * \param lpos_dst: line offset on destination matrix
90 * \param rpos_dst: row offset on destination matrix
91 * \param lpos_src: line offset on destination matrix
92 * \param rpos_src: row offset on destination matrix
94 void xbt_matrix_copy_values(xbt_matrix_t dst, xbt_matrix_t src, unsigned int lsize, unsigned int rsize,
95 unsigned int lpos_dst, unsigned int rpos_dst,unsigned int lpos_src, unsigned int rpos_src,
96 pvoid_f_pvoid_t const cpy_f)
100 XBT_DEBUG ("Copy a %ux%u submatrix from %ux%u(of %ux%u) to %ux%u (of %ux%u)",
101 lsize, rsize, lpos_src, rpos_src, src->lines, src->rows, lpos_dst, rpos_dst, dst->lines, dst->rows);
103 /* everybody knows that issue is between the chair and the screen (particulary in my office) */
104 xbt_assert(src->elmsize == dst->elmsize);
105 /* don't check free_f since the user may play weird games with this */
107 xbt_assert(lpos_src + lsize <= src->lines);
108 xbt_assert(rpos_src + rsize <= src->rows);
110 xbt_assert(lpos_dst + lsize <= dst->lines);
111 xbt_assert(rpos_dst + rsize <= dst->rows);
113 /* Lets get serious here */
114 for (i = 0; i < rsize; i++) {
116 for (j = 0; j < lsize; j++)
117 xbt_matrix_get_as(dst, j + lpos_dst, i + rpos_dst, void *) =
118 cpy_f(xbt_matrix_get_ptr(src, j + rpos_src, i + lpos_src));
120 memcpy(xbt_matrix_get_ptr(dst, lpos_dst, i + rpos_dst), xbt_matrix_get_ptr(src, lpos_src, i + rpos_src),
121 dst->elmsize * lsize);
126 /** \brief Creates a new matrix of double filled with zeros */
127 xbt_matrix_t xbt_matrix_double_new_zeros(int lines, int rows)
129 xbt_matrix_t res = xbt_matrix_new(lines, rows, sizeof(double), NULL);
131 memset(res->data, 0, res->elmsize * res->lines * res->rows);
135 /** \brief Creates a new matrix of double being the identity matrix */
136 xbt_matrix_t xbt_matrix_double_new_id(int lines, int rows)
138 xbt_matrix_t res = xbt_matrix_double_new_zeros(lines, rows);
141 for (i = 0; i < lines; i++)
142 xbt_matrix_get_as(res, i, i, double) = 1;
146 /** \brief Creates a new matrix of double containing the sequence of numbers in order */
147 xbt_matrix_t xbt_matrix_double_new_seq(int lines, int rows)
149 xbt_matrix_t res = xbt_matrix_new(lines, rows, sizeof(double), NULL);
152 for (i = 0; i < lines * rows; i++)
153 *(double *) &res->data[i * res->elmsize] = i;
158 /** \brief add to C the result of A*B */
159 void xbt_matrix_double_addmult(xbt_matrix_t A, xbt_matrix_t B, /*OUT*/ xbt_matrix_t C)
161 unsigned int i, j, k;
163 xbt_assert(A->lines == C->lines, "A->lines != C->lines (%u vs %u)", A->lines, C->lines);
164 xbt_assert(B->rows == C->rows);
166 for (i = 0; i < C->lines; i++)
167 for (j = 0; j < C->rows; j++)
168 for (k = 0; k < B->lines; k++)
169 xbt_matrix_get_as(C, i, j, double) += xbt_matrix_get_as(A, i, k, double) * xbt_matrix_get_as(B, k, j, double);