/**
* Writes the browse host data of the context ``ctx'' to the buffer
* ``dest''. This must be called multiple times to retrieve the complete
* data until zero is returned i.e., the end of file is reached.
*
* This routine deals with query hit data generation.
*
* @param ctx an initialized browse host context.
* @param dest the destination buffer.
* @param size the amount of bytes ``dest'' can hold.
*
* @return -1 on failure, zero at the end-of-file condition or if size
* was zero. On success, the amount of bytes copied to ``dest''
* is returned.
*/
static ssize_t
browse_host_read_qhits(struct special_upload *ctx,
void *const dest, size_t size)
{
struct browse_host_upload *bh = cast_to_browse_host_upload(ctx);
size_t remain = size;
char *p = dest;
/*
* If we have no hit pending that we can send, build some more.
*/
if (NULL == bh->hits) {
pslist_t *files = NULL, *sl;
int i;
for (i = 0; i < BH_SCAN_AHEAD; i++) {
shared_file_t *sf;
do {
/* Skip holes in indices */
bh->file_index++;
sf = shared_file_sorted(bh->file_index);
} while (NULL == sf && bh->file_index <= shared_files_scanned());
if (SHARE_REBUILDING == sf || NULL == sf)
break;
files = pslist_prepend(files, sf);
}
if (NULL == files) /* Did not find any more file to include */
return 0; /* We're done */
/*
* Now build the query hits containing the files we selected.
*/
files = pslist_reverse(files); /* Preserve order */
if (bh->flags & BH_F_G2) {
g2_build_qh2_results(files, i, BH_MAX_QH2_SIZE,
browse_host_record_qh2, bh, &blank_guid, 0);
} else {
qhit_build_results(files, i, BH_MAX_QHIT_SIZE,
browse_host_record_hit, bh, &blank_guid, 0, &zero_array);
}
g_assert(bh->hits != NULL); /* At least 1 hit enqueued */
bh->hits = pslist_reverse(bh->hits); /* Preserve order */
PSLIST_FOREACH(files, sl) {
shared_file_t *sf = sl->data;
shared_file_unref(&sf);
}
/**
* Writes the browse host data of the context ``ctx'' to the buffer
* ``dest''. This must be called multiple times to retrieve the complete
* data until zero is returned i.e., the end of file is reached.
*
* This routine deals with query hit data generation.
*
* @param ctx an initialized browse host context.
* @param dest the destination buffer.
* @param size the amount of bytes ``dest'' can hold.
*
* @return -1 on failure, zero at the end-of-file condition or if size
* was zero. On success, the amount of bytes copied to ``dest''
* is returned.
*/
static ssize_t
browse_host_read_qhits(struct special_upload *ctx,
void *const dest, size_t size)
{
struct browse_host_upload *bh = cast_to_browse_host_upload(ctx);
size_t remain = size;
char *p = dest;
/*
* If we have no hit pending that we can send, build some more.
*/
if (NULL == bh->hits) {
GSList *files = NULL;
int i;
for (i = 0; i < BH_SCAN_AHEAD; i++) {
const shared_file_t *sf;
do {
/* Skip holes in indices */
bh->file_index++;
sf = shared_file_sorted(bh->file_index);
} while (NULL == sf && bh->file_index <= shared_files_scanned());
if (SHARE_REBUILDING == sf || NULL == sf)
break;
files = g_slist_prepend(files, deconstify_pointer(sf));
}
if (NULL == files) /* Did not find any more file to include */
return 0; /* We're done */
/*
* Now build the query hits containing the files we selected.
*/
files = g_slist_reverse(files); /* Preserve order */
qhit_build_results(files, i, BH_MAX_QHIT_SIZE,
browse_host_record_hit, bh, &blank_guid, FALSE, &zero_array);
g_assert(bh->hits != NULL); /* At least 1 hit enqueued */
bh->hits = g_slist_reverse(bh->hits); /* Preserve order */
gm_slist_free_null(&files);
}
/*
* Read each query hit in turn.
*/
while (remain > 0 && NULL != bh->hits) {
pmsg_t *mb = bh->hits->data;
int r;
r = pmsg_read(mb, p, remain);
p += r;
remain -= r;
if (r == 0 || 0 == pmsg_size(mb)) {
bh->hits = g_slist_remove(bh->hits, mb);
pmsg_free(mb);
}
}
return size - remain;
}
