smain.c

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#include <stdio.h>
#include <stdlib.h>
#include <grass/bitmap.h>
 
static int dump_map(struct BM *map);
 
int main(int argc, char *argv[])
{
    int SIZE;
    struct BM *map, *map2;
    int i, x, y;
    int dump;
    FILE *fp;
 
    if (argc < 2)
        SIZE = 11;
    else
        SIZE = atoi(argv[1]);
 
    if (NULL == getenv("NODUMP"))
        dump = 1;
    else
        dump = 0;
 
    map = BM_create_sparse(SIZE, SIZE);
 
    /* turn on bits in X pattern */
    for (i = 0; i < SIZE; i++) {
        BM_set(map, i, i, 1);
        BM_set(map, (SIZE - 1) - i, i, 1);
    }
 
    if (dump)
        dump_map(map);
 
    fprintf(stdout, "Size = %d\n", BM_get_map_size(map));
 
    /*
       BM_dump_map_sparse (map);
     */
 
    fprintf(stdout, "\n\n");
    /* now invert it */
    for (y = 0; y < SIZE; y++)
        for (x = 0; x < SIZE; x++) {
            BM_set(map, x, y, !BM_get(map, x, y));
#ifdef FOO
            /*DEBUG*/ if (y == 0)
                /*DEBUG*/ BM_dump_map_row_sparse(map, y);
#endif
        }
 
    if (dump)
        dump_map(map);
 
    fprintf(stdout, "Size = %d\n", BM_get_map_size(map));
    /*
       fprintf (stdout, "\n\n");
       BM_dump_map_sparse (map);
     */
    {
        fp = fopen("dumpfile", "w");
        if (0 > BM_file_write(fp, map)) {
            fprintf(stderr, "File_write failed\n");
            goto nowrite;
        }
        fclose(fp);
 
        fp = fopen("dumpfile", "r");
        map2 = BM_file_read(fp);
        fclose(fp);
        dump_map(map2);
    }
 
    BM_destroy(map2);
nowrite:
 
    BM_destroy(map);
 
    return 0;
}
 
static int dump_map(struct BM *map)
{
    int x, y;
 
    for (y = 0; y < map->rows; y++) {
        for (x = 0; x < map->cols; x++) {
            fprintf(stdout, "%c", BM_get(map, x, y) ? '#' : '.');
        }
        fprintf(stdout, "\n");
    }
}