37#include <grass/linkm.h>
38#include <grass/bitmap.h>
40#define BM_col_to_byte(x) ((x) >> 3)
41#define BM_col_to_bit(x) ((x)&7)
43static int Mode = BM_FLAT;
62 if (Mode == BM_SPARSE)
65 if (
NULL == (map = (
struct BM *)malloc(
sizeof(
struct BM))))
68 map->bytes = (
x + 7) / 8;
71 (map->data = (
unsigned char *)calloc(map->bytes * y,
sizeof(
char)))) {
157 fprintf(stderr,
"BM_set_mode: Unknown mode: %d\n", mode);
162 fprintf(stderr,
"BM_set_mode: Bad size: %d\n", size);
185int BM_set(
struct BM *map,
int x,
int y,
int val)
246 return (
size_t)map->bytes * map->rows;
273 fwrite(&c,
sizeof(
char),
sizeof(
char), fp);
275 fwrite(BM_TEXT, BM_TEXT_LEN,
sizeof(
char), fp);
278 fwrite(&c,
sizeof(
char),
sizeof(
char), fp);
280 fwrite(&(map->rows),
sizeof(map->rows),
sizeof(
char), fp);
282 fwrite(&(map->cols),
sizeof(map->cols),
sizeof(
char), fp);
284 for (i = 0; i < map->rows; i++)
286 fwrite(&(map->data[i * map->bytes]),
sizeof(
char), map->bytes, fp))
310 char buf[BM_TEXT_LEN + 1];
312 struct BMlink *p =
NULL, *p2;
315 if (
NULL == (map = (
struct BM *)malloc(
sizeof(
struct BM))))
318 if (fread(&c,
sizeof(
char),
sizeof(
char), fp) !=
sizeof(
char)) {
328 if (fread(buf, BM_TEXT_LEN,
sizeof(
char), fp) !=
sizeof(
char)) {
333 if (fread(&c,
sizeof(
char),
sizeof(
char), fp) !=
sizeof(
char)) {
339 if (fread(&(map->rows),
sizeof(map->rows),
sizeof(
char), fp) !=
345 if (fread(&(map->cols),
sizeof(map->cols),
sizeof(
char), fp) !=
351 map->bytes = (map->cols + 7) / 8;
353 if (map->sparse == BM_SPARSE)
356 if (
NULL == (map->data = (
unsigned char *)malloc(map->bytes * map->rows))) {
361 for (i = 0; i < map->rows; i++)
363 fread(&(map->data[i * map->bytes]),
sizeof(
char), map->bytes, fp)) {
374 map->token =
link_init(
sizeof(
struct BMlink));
376 if (
NULL == (map->data = (
unsigned char *)malloc(
sizeof(
struct BMlink *) *
382 for (y = 0; y < map->rows; y++) {
384 if (fread(&i,
sizeof(i),
sizeof(
char), fp) !=
sizeof(
char)) {
392 for (i = 0; i < cnt; i++) {
393 p2 = (
struct BMlink *)
link_new(map->token);
396 ((
struct BMlink **)(map->data))[y] = p2;
404 if (fread(&n,
sizeof(n),
sizeof(
char), fp) !=
sizeof(
char)) {
411 if (fread(&n,
sizeof(n),
sizeof(
char), fp) !=
sizeof(
char)) {
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)
void link_set_chunk_size(int size)
struct link_head * link_init(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'.