int fm_search(char *pattern, int pat_len, char *infile_name)
{
void fatal_error(char *);
void read_prologue(bwi_out *);
bwi_out s_main;
bwi_out *s = &s_main;
int num_occ,sp,ep;
Report_occ = 0;
Locate_occ = 0;
Display_occ = 0;
Oneline_report = 0;
Type_mem_ops = EXT_MEM;
Cache_percentage = 0;
if (check_bwi_suffix(infile_name) == 0)
fatal_error("The file name must end with .bwi -main-\n");
my_open_file(infile_name);
init_bwi_cache();
read_prologue(s);
num_occ = bwsearch(s, pattern, pat_len, &sp, &ep);
my_fclose(Infile);
return num_occ;
}
int fm_unbuild(fm_index *s, uchar ** text, ulong *length) {
int error;
ulong i;
if ((error = read_prologue(s)) < 0 ) {
free_unbuild_mem(s);
return error;
}
if ((error = uncompress_data(s)) < 0 ) {
free_unbuild_mem(s);
return error;
}
if ((error = fm_compute_lf(s)) < 0 ) {
free_unbuild_mem(s);
return error;
}
if ((error = fm_invert_bwt(s)) < 0 ) {
free_unbuild_mem(s);
return error;
}
ulong real_text_size;
if(s->skip>1) real_text_size = s->text_size-s->num_marked_rows;
else real_text_size = s->text_size;
/* remap text */
for(i=0; i<real_text_size; i++) {
if(s->text[i] == s->specialchar) s->text[i] = s->subchar;
s->text[i] = s->inv_char_map[s->text[i]];
}
*text = s->text;
s->text = NULL;
free_unbuild_mem(s); /* libera memoria allocata */
*length = real_text_size;
return FM_OK;
}
