GRASS GIS 7 Programmer's Manual  7.5.svn(2017)-r71817
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ialloc.c
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1 
2 /**
3  * \file ialloc.c
4  *
5  * \brief Matrix memory management functions.
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or (at
10  * your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  *
21  * \author GRASS GIS Development Team
22  *
23  * \date 2004-2006
24  */
25 
26 
27 #include <stdlib.h>
28 #include <grass/gis.h>
29 
30 
31 /**
32  * \fn int *G_alloc_ivector (size_t n)
33  *
34  * \brief Vector matrix memory allocation.
35  *
36  * Allocate a vector (array) of <b>n</b> integers initialized to zero.
37  *
38  * \param[in] n size of vector to allocate
39  * \return integer *
40  */
41 int *G_alloc_ivector(size_t n)
42 {
43  return (int *)G_calloc(n, sizeof(int));
44 }
45 
46 /**
47  * \fn int **G_alloc_imatrix (int rows, int cols)
48  *
49  * \brief Matrix memory allocation.
50  *
51  * Allocate a matrix of <b>rows</b> by <b>cols</b> integers initialized
52  * to zero.
53  *
54  * \param[in] rows number of rows in matrix
55  * \param[in] cols number of columns in matrix
56  * \return int **
57  */
58 int **G_alloc_imatrix(int rows, int cols)
59 {
60  int **m;
61  int i;
62 
63  m = (int **)G_calloc(rows, sizeof(int *));
64  m[0] = (int *)G_calloc((size_t) rows * cols, sizeof(int));
65  for (i = 1; i < rows; i++)
66  m[i] = m[i - 1] + cols;
67 
68  return m;
69 }
70 
71 /**
72  * \fn void G_free_ivector(int *v)
73  *
74  * \brief Vector memory deallocation.
75  *
76  * Deallocate a vector (array) of integers.
77  *
78  * \param[in,out] v vector to free
79  * \return void
80  */
81 void G_free_ivector(int *v)
82 {
83  G_free(v);
84  v = NULL;
85 
86  return;
87 }
88 
89 /**
90  * \fn int G_free_imatrix (int **m)
91  *
92  * \brief Matrix memory deallocation.
93  *
94  * Deallocate a matrix of integers.
95  *
96  * \param[in,out] m matrix to free
97  * \return void
98  */
99 void G_free_imatrix(int **m)
100 {
101  G_free(m[0]);
102  G_free(m);
103  m = NULL;
104 
105  return;
106 }
void G_free(void *buf)
Free allocated memory.
Definition: gis/alloc.c:149
#define NULL
Definition: ccmath.h:32
int * G_alloc_ivector(size_t n)
Vector matrix memory allocation.
Definition: ialloc.c:41
int
Reads the categories file for map name in mapset and stores the categories in the pcats structure...
int ** G_alloc_imatrix(int rows, int cols)
Matrix memory allocation.
Definition: ialloc.c:58
void G_free_imatrix(int **m)
Matrix memory deallocation.
Definition: ialloc.c:99
void G_free_ivector(int *v)
Vector memory deallocation.
Definition: ialloc.c:81