static read_method_decl(filtered)
{
struct filtered_istream *fs = &(st->u.filtered);
size_t filled = 0;
while (sz) {
/* do we already have filtered output? */
if (fs->o_ptr < fs->o_end) {
size_t to_move = fs->o_end - fs->o_ptr;
if (sz < to_move)
to_move = sz;
memcpy(buf + filled, fs->obuf + fs->o_ptr, to_move);
fs->o_ptr += to_move;
sz -= to_move;
filled += to_move;
continue;
}
fs->o_end = fs->o_ptr = 0;
/* do we have anything to feed the filter with? */
if (fs->i_ptr < fs->i_end) {
size_t to_feed = fs->i_end - fs->i_ptr;
size_t to_receive = FILTER_BUFFER;
if (stream_filter(fs->filter,
fs->ibuf + fs->i_ptr, &to_feed,
fs->obuf, &to_receive))
return -1;
fs->i_ptr = fs->i_end - to_feed;
fs->o_end = FILTER_BUFFER - to_receive;
continue;
}
/* tell the filter to drain upon no more input */
if (fs->input_finished) {
size_t to_receive = FILTER_BUFFER;
if (stream_filter(fs->filter,
NULL, NULL,
fs->obuf, &to_receive))
return -1;
fs->o_end = FILTER_BUFFER - to_receive;
if (!fs->o_end)
break;
continue;
}
fs->i_end = fs->i_ptr = 0;
/* refill the input from the upstream */
if (!fs->input_finished) {
fs->i_end = read_istream(fs->upstream, fs->ibuf, FILTER_BUFFER);
if (fs->i_end < 0)
return -1;
if (fs->i_end)
continue;
}
fs->input_finished = 1;
}
return filled;
}
void test_stream_filter(void) {
stream_t *st;
long count = 0;
puts("Testing even filter (0-10):");
st = stream_range(0, 10, 1);
while(!stream_empty(st)) {
st = stream_filter(st, stream_generic_filter_even, NULL);
if(!st) break;
printf("\t%p\n", (void *)stream_head(st));
CU_ASSERT((void *)stream_head(st) == (void *)count);
count += 2;
st = stream_tail(st);
}
return;
}
/*
* Filter a stream of struct Schedule to contain schedules that contain a
* specific date.
*
* @param s Stream
* @param t time_t to filter against
* @return EXIT_FAILURE or EXIT_SUCCESS
*/
int tt_filter_schedule_contains_date(Stream *s, time_t *t) {
return stream_filter(s, filter, t, NULL);
}
