3 // Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 // This program is free software; you can redistribute it and/or modify
6 // it under the terms of the GNU General Public License as published by
7 // the Free Software Foundation; version 2 of the License.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 // TODO: do not iterate from begin to end but in the reverse direction. This should be more
31 Vector_unique(struct Vector *vec, int (*compare)(const void *, const void *))
35 if (vec->count<2) return;
37 for (idx=0; idx+1<vec->count; ++idx) {
38 char *ptr = (char *)(vec->data) + idx*vec->elem_size;
39 char *next_ptr = ptr + vec->elem_size;
40 size_t next_idx = idx + 1;
42 while (next_idx<vec->count &&
43 compare(ptr, next_ptr)==0) {
45 next_ptr += vec->elem_size;
48 if (next_idx==vec->count)
50 else if (next_idx-idx > 1) {
51 memmove(ptr + vec->elem_size,
52 next_ptr, (vec->count - next_idx)*vec->elem_size);
53 vec->count -= (next_idx-idx-1);