static struct cache_entry *create_ce_entry(const struct traverse_info *info, const struct name_entry *n, int stage)
{
int len = traverse_path_len(info, n);
struct cache_entry *ce = xcalloc(1, cache_entry_size(len));
ce->ce_mode = create_ce_mode(n->mode);
ce->ce_flags = create_ce_flags(stage);
ce->ce_namelen = len;
hashcpy(ce->sha1, n->sha1);
make_traverse_path(ce->name, info, n);
return ce;
}
static char *traverse_path(const struct traverse_info *info, const struct name_entry *n)
{
char *path = xmallocz(traverse_path_len(info, n) + the_hash_algo->rawsz);
return make_traverse_path(path, info, n);
}
static char *traverse_path(const struct traverse_info *info, const struct name_entry *n)
{
char *path = xmalloc(traverse_path_len(info, n) + 1);
return make_traverse_path(path, info, n);
}
int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info)
{
int error = 0;
struct name_entry *entry = xmalloc(n*sizeof(*entry));
int i;
struct tree_desc_x *tx = xcalloc(n, sizeof(*tx));
struct strbuf base = STRBUF_INIT;
int interesting = 1;
for (i = 0; i < n; i++)
tx[i].d = t[i];
if (info->prev) {
strbuf_grow(&base, info->pathlen);
make_traverse_path(base.buf, info->prev, &info->name);
base.buf[info->pathlen-1] = '/';
strbuf_setlen(&base, info->pathlen);
}
for (;;) {
int trees_used;
unsigned long mask, dirmask;
const char *first = NULL;
int first_len = 0;
struct name_entry *e = NULL;
int len;
for (i = 0; i < n; i++) {
e = entry + i;
extended_entry_extract(tx + i, e, NULL, 0);
}
/*
* A tree may have "t-2" at the current location even
* though it may have "t" that is a subtree behind it,
* and another tree may return "t". We want to grab
* all "t" from all trees to match in such a case.
*/
for (i = 0; i < n; i++) {
e = entry + i;
if (!e->path)
continue;
len = tree_entry_len(e);
if (!first) {
first = e->path;
first_len = len;
continue;
}
if (name_compare(e->path, len, first, first_len) < 0) {
first = e->path;
first_len = len;
}
}
if (first) {
for (i = 0; i < n; i++) {
e = entry + i;
extended_entry_extract(tx + i, e, first, first_len);
/* Cull the ones that are not the earliest */
if (!e->path)
continue;
len = tree_entry_len(e);
if (name_compare(e->path, len, first, first_len))
entry_clear(e);
}
}
/* Now we have in entry[i] the earliest name from the trees */
mask = 0;
dirmask = 0;
for (i = 0; i < n; i++) {
if (!entry[i].path)
continue;
mask |= 1ul << i;
if (S_ISDIR(entry[i].mode))
dirmask |= 1ul << i;
e = &entry[i];
}
if (!mask)
break;
interesting = prune_traversal(e, info, &base, interesting);
if (interesting < 0)
break;
if (interesting) {
trees_used = info->fn(n, mask, dirmask, entry, info);
if (trees_used < 0) {
error = trees_used;
if (!info->show_all_errors)
break;
}
mask &= trees_used;
}
for (i = 0; i < n; i++)
if (mask & (1ul << i))
update_extended_entry(tx + i, entry + i);
}
free(entry);
for (i = 0; i < n; i++)
free_extended_entry(tx + i);
free(tx);
strbuf_release(&base);
return error;
}
