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Remove "tree->entries" tree-entry list from tree parser

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Instead, just use the tree buffer directly, and use the tree-walk
infrastructure to walk the buffers instead of the tree-entry list.

The tree-entry list is inefficient, and generates tons of small
allocations for no good reason. The tree-walk infrastructure is
generally no harder to use than following a linked list, and allows
us to do most tree parsing in-place.

Some programs still use the old tree-entry lists, and are a bit
painful to convert without major surgery. For them we have a helper
function that creates a temporary tree-entry list on demand.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Linus Torvalds
2006-05-29 12:18:33 -07:00
committed by Junio C Hamano
parent 1ccf5a345a
commit 2d9c58c69d
9 changed files with 117 additions and 58 deletions
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26
builtin-rev-list.c
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@ -113,7 +113,7 @@ static struct object_list **process_tree(struct tree *tree,
const char *name)
{
struct object *obj = &tree->object;
struct tree_entry_list *entry;
struct tree_desc desc;
struct name_path me;
if (!revs.tree_objects)
@ -128,16 +128,22 @@ static struct object_list **process_tree(struct tree *tree,
me.up = path;
me.elem = name;
me.elem_len = strlen(name);
entry = tree->entries;
tree->entries = NULL;
while (entry) {
struct tree_entry_list *next = entry->next;
if (entry->directory)
p = process_tree(lookup_tree(entry->sha1), p, &me, entry->name);
desc.buf = tree->buffer;
desc.size = tree->size;
while (desc.size) {
unsigned mode;
const char *name;
const unsigned char *sha1;
sha1 = tree_entry_extract(&desc, &name, &mode);
update_tree_entry(&desc);
if (S_ISDIR(mode))
p = process_tree(lookup_tree(sha1), p, &me, name);
else
p = process_blob(lookup_blob(entry->sha1), p, &me, entry->name);
free(entry);
entry = next;
p = process_blob(lookup_blob(sha1), p, &me, name);
}
free(tree->buffer);
tree->buffer = NULL;