1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*!
* \file lib/raster/alloc_cell.c
*
* \brief Raster Library - Raster allocation routines.
*
* (C) 2001-2009 by the GRASS Development Team
*
* This program is free software under the GNU General Public License
* (>=v2). Read the file COPYING that comes with GRASS for details.
*
* \author Original author CERL
*/
#include <math.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/glocale.h>
/* convert type "RASTER_MAP_TYPE" into index */
#define F2I(map_type) \
(map_type == CELL_TYPE ? 0 : (map_type == FCELL_TYPE ? 1 : 2))
static const int type_size[3] = {sizeof(CELL), sizeof(FCELL), sizeof(DCELL)};
/*!
* \brief Returns size of a raster cell in bytes.
*
* - If <i>data_type</i> is CELL_TYPE, returns sizeof(CELL)
* - If <i>data_type</i> is FCELL_TYPE, returns sizeof(FCELL)
* - If <i>data_type</i> is DCELL_TYPE, returns sizeof(DCELL)
*
* \param data_type raster type (CELL, FCELL, DCELL)
*
* \return raster type size
*/
size_t Rast_cell_size(RASTER_MAP_TYPE data_type)
{
return (type_size[F2I(data_type)]);
}
/*!
* \brief Allocate memory for a raster map of given type
*
* Allocate an array of CELL, FCELL, or DCELL (depending on
* <i>data_type</i>) based on the number of columns in the current
* region.
*
* \param data_type raster type (CELL, FCELL, DCELL)
*
* \return pointer to allocated buffer
*/
void *Rast_allocate_buf(RASTER_MAP_TYPE data_type)
{
return (void *)G_calloc(Rast_window_cols() + 1, Rast_cell_size(data_type));
}
/*!
* \brief Allocate memory for a CELL type raster map.
*
* Allocate an array of CELL based on the number of columns in the
* current region.
*
* This routine allocates a buffer of type CELL just large enough to
* hold one row of raster data based on the number of columns in the
* active region.
*
\code
CELL *cell;
cell = Rast_allocate_c_buf();
\endcode
*
* If larger buffers are required, the routine G_malloc() can be used.
* The routine is generally used with each open cell file.
*
* Prints error message and calls exit() on error.
*
* \return pointer to allocated buffer
*/
CELL *Rast_allocate_c_buf(void)
{
return (CELL *)G_calloc(Rast_window_cols() + 1, sizeof(CELL));
}
/*!
* \brief Allocates memory for a raster map of type FCELL.
*
* Allocate an array of FCELL based on the number of columns in the
* current region.
*
* \return pointer to allocated buffer
*/
FCELL *Rast_allocate_f_buf(void)
{
return (FCELL *)G_calloc(Rast_window_cols() + 1, sizeof(FCELL));
}
/*!
* \brief Allocates memory for a raster map of type DCELL.
*
* Allocate an array of DCELL based on the number of columns in the
* current region.
*
* \return pointer to allocated buffer
*/
DCELL *Rast_allocate_d_buf(void)
{
return (DCELL *)G_calloc(Rast_window_cols() + 1, sizeof(DCELL));
}
/*!
* \brief Allocates memory for a null buffer.
*
* Allocate an array of char based on the number of columns in the
* current region.
*
* \return pointer to allocated buffer
*/
char *Rast_allocate_null_buf(void)
{
return (char *)G_calloc(Rast_window_cols() + 1, sizeof(char));
}
/*!
* \brief Allocates memory for null bits.
*
* Allocates an array of unsigned char based on <i>cols</i>.
*
* \param cols number of columns in region
*
* \return pointer to allocated buffer
*/
unsigned char *Rast__allocate_null_bits(int cols)
{
return (unsigned char *)G_calloc(Rast__null_bitstream_size(cols) + 1,
sizeof(unsigned char));
}
/*!
* \brief Determines null bitstream size.
*
* \param cols number of columns
*
* \return size of null bitstream
*/
int Rast__null_bitstream_size(int cols)
{
if (cols <= 0)
G_fatal_error(_("Rast__null_bitstream_size: cols (%d) is negative"),
cols);
return (cols + 7) / 8;
}
void *Rast_allocate_input_buf(RASTER_MAP_TYPE data_type)
{
return G_calloc(Rast_input_window_cols() + 1, Rast_cell_size(data_type));
}
CELL *Rast_allocate_c_input_buf(void)
{
return (CELL *)G_calloc(Rast_input_window_cols() + 1, sizeof(CELL));
}
FCELL *Rast_allocate_f_input_buf(void)
{
return (FCELL *)G_calloc(Rast_input_window_cols() + 1, sizeof(FCELL));
}
DCELL *Rast_allocate_d_input_buf(void)
{
return (DCELL *)G_calloc(Rast_input_window_cols() + 1, sizeof(DCELL));
}
char *Rast_allocate_null_input_buf(void)
{
return (char *)G_calloc(Rast_input_window_cols() + 1, sizeof(char));
}
void *Rast_allocate_output_buf(RASTER_MAP_TYPE data_type)
{
return G_calloc(Rast_output_window_cols() + 1, Rast_cell_size(data_type));
}
CELL *Rast_allocate_c_output_buf(void)
{
return (CELL *)G_calloc(Rast_output_window_cols() + 1, sizeof(CELL));
}
FCELL *Rast_allocate_f_output_buf(void)
{
return (FCELL *)G_calloc(Rast_output_window_cols() + 1, sizeof(FCELL));
}
DCELL *Rast_allocate_d_output_buf(void)
{
return (DCELL *)G_calloc(Rast_output_window_cols() + 1, sizeof(DCELL));
}
char *Rast_allocate_null_output_buf(void)
{
return (char *)G_calloc(Rast_output_window_cols() + 1, sizeof(char));
}
|
