GRASS GIS 8 Programmer's Manual
8.5.0dev(2024)-b4187339ee
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Go to the source code of this file.
Macros | |
#define | BM_col_to_byte(x) ((x) >> 3) /* x / 8 */ |
#define | BM_col_to_bit(x) ((x) & 7) /* x % 8 */ |
Functions | |
struct BM * | BM_create_sparse (int x, int y) |
Create a sparse bitmap of dimension 'x'/'y'. More... | |
int | BM_destroy_sparse (struct BM *map) |
Destroy sparse bitmap and free all associated memory. More... | |
int | BM_set_sparse (struct BM *map, int x, int y, int val) |
Set sparse bitmap value to 'val' at location 'x'/'y'. More... | |
int | BM_get_sparse (struct BM *map, int x, int y) |
Returns sparse bitmap value at location 'x'/'y'. More... | |
size_t | BM_get_map_size_sparse (struct BM *map) |
Returns size of sparse bitmap in bytes. More... | |
int | BM_dump_map_sparse (struct BM *map) |
Debugging code to dump out structure of links. More... | |
int | BM_dump_map_row_sparse (struct BM *map, int y) |
Debugging code to dump out structure of links for single row. More... | |
int | BM_file_write_sparse (FILE *fp, struct BM *map) |
Write sparse bitmap matrix out to disk file 'fp'. NOTE: 'fp' must already be opened and later closed by user. More... | |
struct BM* BM_create_sparse | ( | int | x, |
int | y | ||
) |
Create a sparse bitmap of dimension 'x'/'y'.
Returns bitmap structure or NULL on error
x | |
y |
Definition at line 42 of file sparse.c.
References BM::bytes, BM::cols, count, BM::data, free(), link_init(), link_new(), link_set_chunk_size(), malloc(), NULL, BM::rows, BM::sparse, BM::token, BMlink::val, and x.
Referenced by main().
int BM_destroy_sparse | ( | struct BM * | map | ) |
Destroy sparse bitmap and free all associated memory.
Returns 0
map |
Definition at line 88 of file sparse.c.
Referenced by BM_destroy().
int BM_dump_map_row_sparse | ( | struct BM * | map, |
int | y | ||
) |
Debugging code to dump out structure of links for single row.
Returns 0
map | |
y |
Definition at line 323 of file sparse.c.
References BMlink::count, BM::data, BMlink::next, NULL, and BMlink::val.
int BM_dump_map_sparse | ( | struct BM * | map | ) |
Debugging code to dump out structure of links.
Returns 0
map |
Definition at line 294 of file sparse.c.
References BMlink::count, BM::data, BMlink::next, NULL, BM::rows, and BMlink::val.
int BM_file_write_sparse | ( | FILE * | fp, |
struct BM * | map | ||
) |
size_t BM_get_map_size_sparse | ( | struct BM * | map | ) |
Returns size of sparse bitmap in bytes.
map |
Definition at line 265 of file sparse.c.
References BM::data, BMlink::next, NULL, and BM::rows.
Referenced by BM_get_map_size().
int BM_get_sparse | ( | struct BM * | map, |
int | x, | ||
int | y | ||
) |
Returns sparse bitmap value at location 'x'/'y'.
Returns value or -1 on error
map | |
x | |
y |
Definition at line 240 of file sparse.c.
References BMlink::count, cur_x, BM::data, BMlink::next, NULL, BMlink::val, and x.
Referenced by BM_get().
int BM_set_sparse | ( | struct BM * | map, |
int | x, | ||
int | y, | ||
int | val | ||
) |
Set sparse bitmap value to 'val' at location 'x'/'y'.
Returns 0
map | |
x | |
y | |
val |
Definition at line 125 of file sparse.c.
References BMlink::count, cur_x, BM::data, link_dispose(), link_new(), BMlink::next, NULL, BM::token, BMlink::val, VOID_T, and x.
Referenced by BM_set().