37 #include <grass/linkm.h>
38 #include <grass/bitmap.h>
41 #define BM_col_to_byte(x) ((x) >> 3)
42 #define BM_col_to_bit(x) ((x) & 7)
44 static int Mode = BM_FLAT;
64 if (Mode == BM_SPARSE)
67 if (
NULL == (map = (
struct BM *)malloc(
sizeof(
struct BM))))
70 map->bytes = (
x + 7) / 8;
72 void *tmp_map_data = (
unsigned char *)calloc(map->bytes * y,
sizeof(
char));
73 if (tmp_map_data ==
NULL){
77 map->data = tmp_map_data;
161 fprintf(stderr,
"BM_set_mode: Unknown mode: %d\n", mode);
166 fprintf(stderr,
"BM_set_mode: Bad size: %d\n", size);
190 int BM_set(
struct BM *map,
int x,
int y,
int val)
194 if (x < 0 || x >= map->cols || y < 0 || y >= map->rows)
227 if (x < 0 || x >= map->cols || y < 0 || y >= map->rows)
253 return (
size_t) map->bytes * map->rows;
281 fwrite(&c,
sizeof(
char),
sizeof(
char), fp);
283 fwrite(BM_TEXT, BM_TEXT_LEN,
sizeof(
char), fp);
286 fwrite(&c,
sizeof(
char),
sizeof(
char), fp);
288 fwrite(&(map->rows),
sizeof(map->rows),
sizeof(
char), fp);
290 fwrite(&(map->cols),
sizeof(map->cols),
sizeof(
char), fp);
292 for (i = 0; i < map->rows; i++)
294 fwrite(&(map->data[i * map->bytes]),
sizeof(
char), map->bytes,
320 char buf[BM_TEXT_LEN + 1];
322 struct BMlink *p =
NULL, *p2;
325 if (
NULL == (map = (
struct BM *)malloc(
sizeof(
struct BM))))
328 fread(&c,
sizeof(
char),
sizeof(
char), fp);
335 fread(buf, BM_TEXT_LEN,
sizeof(
char), fp);
337 fread(&c,
sizeof(
char),
sizeof(
char), fp);
341 fread(&(map->rows),
sizeof(map->rows),
sizeof(
char), fp);
343 fread(&(map->cols),
sizeof(map->cols),
sizeof(
char), fp);
345 map->bytes = (map->cols + 7) / 8;
347 if (map->sparse == BM_SPARSE)
350 if (
NULL == (map->data = (
unsigned char *)malloc(map->bytes * map->rows)))
357 for (i = 0; i < map->rows; i++)
359 fread(&(map->data[i * map->bytes]),
sizeof(
char), map->bytes, fp))
368 map->token =
link_init(
sizeof(
struct BMlink));
371 if (
NULL == (map->data = (
unsigned char *)
372 malloc(
sizeof(
struct BMlink *) * map->rows)))
375 for (y = 0; y < map->rows; y++) {
377 fread(&i,
sizeof(i),
sizeof(
char), fp);
382 for (i = 0; i < cnt; i++) {
383 p2 = (
struct BMlink *)
link_new(map->token);
386 ((
struct BMlink **)(map->data))[y] = p2;
394 fread(&n,
sizeof(n),
sizeof(
char), fp);
397 fread(&n,
sizeof(n),
sizeof(
char), fp);
struct BM * BM_create(int x, int y)
Create bitmap of dimension x/y and return structure token.
int BM_set(struct BM *map, int x, int y, int val)
Sets bitmap value to 'val' at location 'x' 'y'.
int BM_file_write(FILE *fp, struct BM *map)
Write bitmap out to file.
size_t BM_get_map_size(struct BM *map)
Returns size in bytes that bitmap is taking up.
int BM_get(struct BM *map, int x, int y)
Gets 'val' from the bitmap.
int BM_destroy(struct BM *map)
Destroy bitmap and free all associated memory.
struct BM * BM_file_read(FILE *fp)
Create map structure and load it from file.
int BM_set_mode(int mode, int size)
Specify the type of data structure to use for bitmap. 'mode' can be either BM_FLAT or BM_SPARSE:
#define BM_col_to_byte(x)
struct link_head * link_init(int size)
void link_set_chunk_size(int size)
VOID_T * link_new(struct link_head *Head)
struct BM * BM_create_sparse(int x, int y)
Create a sparse bitmap of dimension 'x'/'y'.
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 ...
int BM_get_sparse(struct BM *map, int x, int y)
Returns sparse bitmap value at location 'x'/'y'.
size_t BM_get_map_size_sparse(struct BM *map)
Returns size of sparse bitmap in bytes.
int BM_destroy_sparse(struct BM *map)
Destroy sparse bitmap and free all associated memory.
int BM_set_sparse(struct BM *map, int x, int y, int val)
Set sparse bitmap value to 'val' at location 'x'/'y'.