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-rw-r--r--notes.c216
1 files changed, 100 insertions, 116 deletions
diff --git a/notes.c b/notes.c
index 8f47c202c5..32d3dbcc1e 100644
--- a/notes.c
+++ b/notes.c
@@ -1,6 +1,7 @@
#include "cache.h"
#include "config.h"
#include "notes.h"
+#include "object-store.h"
#include "blob.h"
#include "tree.h"
#include "utf8.h"
@@ -64,7 +65,7 @@ struct non_note {
#define CLR_PTR_TYPE(ptr) ((void *) ((uintptr_t) (ptr) & ~3))
#define SET_PTR_TYPE(ptr, type) ((void *) ((uintptr_t) (ptr) | (type)))
-#define GET_NIBBLE(n, sha1) (((sha1[(n) >> 1]) >> ((~(n) & 0x01) << 2)) & 0x0f)
+#define GET_NIBBLE(n, sha1) ((((sha1)[(n) >> 1]) >> ((~(n) & 0x01) << 2)) & 0x0f)
#define KEY_INDEX (GIT_SHA1_RAWSZ - 1)
#define FANOUT_PATH_SEPARATORS ((GIT_SHA1_HEXSZ / 2) - 1)
@@ -270,8 +271,8 @@ static int note_tree_insert(struct notes_tree *t, struct int_node *tree,
if (!oidcmp(&l->val_oid, &entry->val_oid))
return 0;
- ret = combine_notes(l->val_oid.hash,
- entry->val_oid.hash);
+ ret = combine_notes(&l->val_oid,
+ &entry->val_oid);
if (!ret && is_null_oid(&l->val_oid))
note_tree_remove(t, tree, n, entry);
free(entry);
@@ -334,34 +335,6 @@ static void note_tree_free(struct int_node *tree)
}
}
-/*
- * Convert a partial SHA1 hex string to the corresponding partial SHA1 value.
- * - hex - Partial SHA1 segment in ASCII hex format
- * - hex_len - Length of above segment. Must be multiple of 2 between 0 and 40
- * - sha1 - Partial SHA1 value is written here
- * - sha1_len - Max #bytes to store in sha1, Must be >= hex_len / 2, and < 20
- * Returns -1 on error (invalid arguments or invalid SHA1 (not in hex format)).
- * Otherwise, returns number of bytes written to sha1 (i.e. hex_len / 2).
- * Pads sha1 with NULs up to sha1_len (not included in returned length).
- */
-static int get_oid_hex_segment(const char *hex, unsigned int hex_len,
- unsigned char *oid, unsigned int oid_len)
-{
- unsigned int i, len = hex_len >> 1;
- if (hex_len % 2 != 0 || len > oid_len)
- return -1;
- for (i = 0; i < len; i++) {
- unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
- if (val & ~0xff)
- return -1;
- *oid++ = val;
- hex += 2;
- }
- for (; i < oid_len; i++)
- *oid++ = 0;
- return len;
-}
-
static int non_note_cmp(const struct non_note *a, const struct non_note *b)
{
return strcmp(a->path, b->path);
@@ -417,80 +390,90 @@ static void load_subtree(struct notes_tree *t, struct leaf_node *subtree,
struct int_node *node, unsigned int n)
{
struct object_id object_oid;
- unsigned int prefix_len;
+ size_t prefix_len;
void *buf;
struct tree_desc desc;
struct name_entry entry;
- int len, path_len;
- unsigned char type;
- struct leaf_node *l;
- buf = fill_tree_descriptor(&desc, subtree->val_oid.hash);
+ buf = fill_tree_descriptor(&desc, &subtree->val_oid);
if (!buf)
die("Could not read %s for notes-index",
oid_to_hex(&subtree->val_oid));
prefix_len = subtree->key_oid.hash[KEY_INDEX];
- assert(prefix_len * 2 >= n);
+ if (prefix_len >= GIT_SHA1_RAWSZ)
+ BUG("prefix_len (%"PRIuMAX") is out of range", (uintmax_t)prefix_len);
+ if (prefix_len * 2 < n)
+ BUG("prefix_len (%"PRIuMAX") is too small", (uintmax_t)prefix_len);
memcpy(object_oid.hash, subtree->key_oid.hash, prefix_len);
while (tree_entry(&desc, &entry)) {
- path_len = strlen(entry.path);
- len = get_oid_hex_segment(entry.path, path_len,
- object_oid.hash + prefix_len, GIT_SHA1_RAWSZ - prefix_len);
- if (len < 0)
- goto handle_non_note; /* entry.path is not a SHA1 */
- len += prefix_len;
+ unsigned char type;
+ struct leaf_node *l;
+ size_t path_len = strlen(entry.path);
+
+ if (path_len == 2 * (GIT_SHA1_RAWSZ - prefix_len)) {
+ /* This is potentially the remainder of the SHA-1 */
+
+ if (!S_ISREG(entry.mode))
+ /* notes must be blobs */
+ goto handle_non_note;
+
+ if (hex_to_bytes(object_oid.hash + prefix_len, entry.path,
+ GIT_SHA1_RAWSZ - prefix_len))
+ goto handle_non_note; /* entry.path is not a SHA1 */
- /*
- * If object SHA1 is complete (len == 20), assume note object
- * If object SHA1 is incomplete (len < 20), and current
- * component consists of 2 hex chars, assume note subtree
- */
- if (len <= GIT_SHA1_RAWSZ) {
type = PTR_TYPE_NOTE;
- l = (struct leaf_node *)
- xcalloc(1, sizeof(struct leaf_node));
- oidcpy(&l->key_oid, &object_oid);
- oidcpy(&l->val_oid, entry.oid);
- if (len < GIT_SHA1_RAWSZ) {
- if (!S_ISDIR(entry.mode) || path_len != 2)
- goto handle_non_note; /* not subtree */
- l->key_oid.hash[KEY_INDEX] = (unsigned char) len;
- type = PTR_TYPE_SUBTREE;
- }
- if (note_tree_insert(t, node, n, l, type,
- combine_notes_concatenate))
- die("Failed to load %s %s into notes tree "
- "from %s",
- type == PTR_TYPE_NOTE ? "note" : "subtree",
- oid_to_hex(&l->key_oid), t->ref);
+ } else if (path_len == 2) {
+ /* This is potentially an internal node */
+ size_t len = prefix_len;
+
+ if (!S_ISDIR(entry.mode))
+ /* internal nodes must be trees */
+ goto handle_non_note;
+
+ if (hex_to_bytes(object_oid.hash + len++, entry.path, 1))
+ goto handle_non_note; /* entry.path is not a SHA1 */
+
+ /*
+ * Pad the rest of the SHA-1 with zeros,
+ * except for the last byte, where we write
+ * the length:
+ */
+ memset(object_oid.hash + len, 0, GIT_SHA1_RAWSZ - len - 1);
+ object_oid.hash[KEY_INDEX] = (unsigned char)len;
+
+ type = PTR_TYPE_SUBTREE;
+ } else {
+ /* This can't be part of a note */
+ goto handle_non_note;
}
+
+ l = xcalloc(1, sizeof(*l));
+ oidcpy(&l->key_oid, &object_oid);
+ oidcpy(&l->val_oid, entry.oid);
+ if (note_tree_insert(t, node, n, l, type,
+ combine_notes_concatenate))
+ die("Failed to load %s %s into notes tree "
+ "from %s",
+ type == PTR_TYPE_NOTE ? "note" : "subtree",
+ oid_to_hex(&l->key_oid), t->ref);
+
continue;
handle_non_note:
/*
- * Determine full path for this non-note entry:
- * The filename is already found in entry.path, but the
- * directory part of the path must be deduced from the subtree
- * containing this entry. We assume here that the overall notes
- * tree follows a strict byte-based progressive fanout
- * structure (i.e. using 2/38, 2/2/36, etc. fanouts, and not
- * e.g. 4/36 fanout). This means that if a non-note is found at
- * path "dead/beef", the following code will register it as
- * being found on "de/ad/beef".
- * On the other hand, if you use such non-obvious non-note
- * paths in the middle of a notes tree, you deserve what's
- * coming to you ;). Note that for non-notes that are not
- * SHA1-like at the top level, there will be no problems.
- *
- * To conclude, it is strongly advised to make sure non-notes
- * have at least one non-hex character in the top-level path
- * component.
+ * Determine full path for this non-note entry. The
+ * filename is already found in entry.path, but the
+ * directory part of the path must be deduced from the
+ * subtree containing this entry based on our
+ * knowledge that the overall notes tree follows a
+ * strict byte-based progressive fanout structure
+ * (i.e. using 2/38, 2/2/36, etc. fanouts).
*/
{
struct strbuf non_note_path = STRBUF_INIT;
const char *q = oid_to_hex(&subtree->key_oid);
- int i;
+ size_t i;
for (i = 0; i < prefix_len; i++) {
strbuf_addch(&non_note_path, *q++);
strbuf_addch(&non_note_path, *q++);
@@ -685,7 +668,7 @@ static int tree_write_stack_finish_subtree(struct tree_write_stack *tws)
ret = tree_write_stack_finish_subtree(n);
if (ret)
return ret;
- ret = write_sha1_file(n->buf.buf, n->buf.len, tree_type, s.hash);
+ ret = write_object_file(n->buf.buf, n->buf.len, tree_type, &s);
if (ret)
return ret;
strbuf_release(&n->buf);
@@ -804,8 +787,8 @@ static int prune_notes_helper(const struct object_id *object_oid,
return 0;
}
-int combine_notes_concatenate(unsigned char *cur_sha1,
- const unsigned char *new_sha1)
+int combine_notes_concatenate(struct object_id *cur_oid,
+ const struct object_id *new_oid)
{
char *cur_msg = NULL, *new_msg = NULL, *buf;
unsigned long cur_len, new_len, buf_len;
@@ -813,18 +796,18 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
int ret;
/* read in both note blob objects */
- if (!is_null_sha1(new_sha1))
- new_msg = read_sha1_file(new_sha1, &new_type, &new_len);
+ if (!is_null_oid(new_oid))
+ new_msg = read_object_file(new_oid, &new_type, &new_len);
if (!new_msg || !new_len || new_type != OBJ_BLOB) {
free(new_msg);
return 0;
}
- if (!is_null_sha1(cur_sha1))
- cur_msg = read_sha1_file(cur_sha1, &cur_type, &cur_len);
+ if (!is_null_oid(cur_oid))
+ cur_msg = read_object_file(cur_oid, &cur_type, &cur_len);
if (!cur_msg || !cur_len || cur_type != OBJ_BLOB) {
free(cur_msg);
free(new_msg);
- hashcpy(cur_sha1, new_sha1);
+ oidcpy(cur_oid, new_oid);
return 0;
}
@@ -843,20 +826,20 @@ int combine_notes_concatenate(unsigned char *cur_sha1,
free(new_msg);
/* create a new blob object from buf */
- ret = write_sha1_file(buf, buf_len, blob_type, cur_sha1);
+ ret = write_object_file(buf, buf_len, blob_type, cur_oid);
free(buf);
return ret;
}
-int combine_notes_overwrite(unsigned char *cur_sha1,
- const unsigned char *new_sha1)
+int combine_notes_overwrite(struct object_id *cur_oid,
+ const struct object_id *new_oid)
{
- hashcpy(cur_sha1, new_sha1);
+ oidcpy(cur_oid, new_oid);
return 0;
}
-int combine_notes_ignore(unsigned char *cur_sha1,
- const unsigned char *new_sha1)
+int combine_notes_ignore(struct object_id *cur_oid,
+ const struct object_id *new_oid)
{
return 0;
}
@@ -866,17 +849,17 @@ int combine_notes_ignore(unsigned char *cur_sha1,
* newlines removed.
*/
static int string_list_add_note_lines(struct string_list *list,
- const unsigned char *sha1)
+ const struct object_id *oid)
{
char *data;
unsigned long len;
enum object_type t;
- if (is_null_sha1(sha1))
+ if (is_null_oid(oid))
return 0;
/* read_sha1_file NUL-terminates */
- data = read_sha1_file(sha1, &t, &len);
+ data = read_object_file(oid, &t, &len);
if (t != OBJ_BLOB || !data || !len) {
free(data);
return t != OBJ_BLOB || !data;
@@ -902,17 +885,17 @@ static int string_list_join_lines_helper(struct string_list_item *item,
return 0;
}
-int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
- const unsigned char *new_sha1)
+int combine_notes_cat_sort_uniq(struct object_id *cur_oid,
+ const struct object_id *new_oid)
{
struct string_list sort_uniq_list = STRING_LIST_INIT_DUP;
struct strbuf buf = STRBUF_INIT;
int ret = 1;
/* read both note blob objects into unique_lines */
- if (string_list_add_note_lines(&sort_uniq_list, cur_sha1))
+ if (string_list_add_note_lines(&sort_uniq_list, cur_oid))
goto out;
- if (string_list_add_note_lines(&sort_uniq_list, new_sha1))
+ if (string_list_add_note_lines(&sort_uniq_list, new_oid))
goto out;
string_list_remove_empty_items(&sort_uniq_list, 0);
string_list_sort(&sort_uniq_list);
@@ -923,7 +906,7 @@ int combine_notes_cat_sort_uniq(unsigned char *cur_sha1,
string_list_join_lines_helper, &buf))
goto out;
- ret = write_sha1_file(buf.buf, buf.len, blob_type, cur_sha1);
+ ret = write_object_file(buf.buf, buf.len, blob_type, cur_oid);
out:
strbuf_release(&buf);
@@ -1026,11 +1009,11 @@ void init_notes(struct notes_tree *t, const char *notes_ref,
t->dirty = 0;
if (flags & NOTES_INIT_EMPTY || !notes_ref ||
- get_sha1_treeish(notes_ref, object_oid.hash))
+ get_oid_treeish(notes_ref, &object_oid))
return;
- if (flags & NOTES_INIT_WRITABLE && read_ref(notes_ref, object_oid.hash))
+ if (flags & NOTES_INIT_WRITABLE && read_ref(notes_ref, &object_oid))
die("Cannot use notes ref %s", notes_ref);
- if (get_tree_entry(object_oid.hash, "", oid.hash, &mode))
+ if (get_tree_entry(&object_oid, "", &oid, &mode))
die("Failed to read notes tree referenced by %s (%s)",
notes_ref, oid_to_hex(&object_oid));
@@ -1141,11 +1124,12 @@ int for_each_note(struct notes_tree *t, int flags, each_note_fn fn,
return for_each_note_helper(t, t->root, 0, 0, flags, fn, cb_data);
}
-int write_notes_tree(struct notes_tree *t, unsigned char *result)
+int write_notes_tree(struct notes_tree *t, struct object_id *result)
{
struct tree_write_stack root;
struct write_each_note_data cb_data;
int ret;
+ int flags;
if (!t)
t = &default_notes_tree;
@@ -1159,12 +1143,12 @@ int write_notes_tree(struct notes_tree *t, unsigned char *result)
cb_data.next_non_note = t->first_non_note;
/* Write tree objects representing current notes tree */
- ret = for_each_note(t, FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
- FOR_EACH_NOTE_YIELD_SUBTREES,
- write_each_note, &cb_data) ||
- write_each_non_note_until(NULL, &cb_data) ||
- tree_write_stack_finish_subtree(&root) ||
- write_sha1_file(root.buf.buf, root.buf.len, tree_type, result);
+ flags = FOR_EACH_NOTE_DONT_UNPACK_SUBTREES |
+ FOR_EACH_NOTE_YIELD_SUBTREES;
+ ret = for_each_note(t, flags, write_each_note, &cb_data) ||
+ write_each_non_note_until(NULL, &cb_data) ||
+ tree_write_stack_finish_subtree(&root) ||
+ write_object_file(root.buf.buf, root.buf.len, tree_type, result);
strbuf_release(&root.buf);
return ret;
}
@@ -1234,7 +1218,7 @@ static void format_note(struct notes_tree *t, const struct object_id *object_oid
if (!oid)
return;
- if (!(msg = read_sha1_file(oid->hash, &type, &msglen)) || type != OBJ_BLOB) {
+ if (!(msg = read_object_file(oid, &type, &msglen)) || type != OBJ_BLOB) {
free(msg);
return;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 14:30:44 +0000