diff options
Diffstat (limited to 'notes.h')
| -rw-r--r-- | notes.h | 47 |
1 files changed, 47 insertions, 0 deletions
@@ -35,6 +35,53 @@ void remove_note(const unsigned char *object_sha1); */ const unsigned char *get_note(const unsigned char *object_sha1); +/* + * Flags controlling behaviour of for_each_note() + * + * Default behaviour of for_each_note() is to traverse every single note object + * in the notes tree, unpacking subtree entries along the way. + * The following flags can be used to alter the default behaviour: + * + * - DONT_UNPACK_SUBTREES causes for_each_note() NOT to unpack and recurse into + * subtree entries while traversing the notes tree. This causes notes within + * those subtrees NOT to be passed to the callback. Use this flag if you + * don't want to traverse _all_ notes, but only want to traverse the parts + * of the notes tree that have already been unpacked (this includes at least + * all notes that have been added/changed). + * + * - YIELD_SUBTREES causes any subtree entries that are encountered to be + * passed to the callback, before recursing into them. Subtree entries are + * not note objects, but represent intermediate directories in the notes + * tree. When passed to the callback, subtree entries will have a trailing + * slash in their path, which the callback may use to differentiate between + * note entries and subtree entries. Note that already-unpacked subtree + * entries are not part of the notes tree, and will therefore not be yielded. + * If this flag is used together with DONT_UNPACK_SUBTREES, for_each_note() + * will yield the subtree entry, but not recurse into it. + */ +#define FOR_EACH_NOTE_DONT_UNPACK_SUBTREES 1 +#define FOR_EACH_NOTE_YIELD_SUBTREES 2 + +/* + * Invoke the specified callback function for each note + * + * If the callback returns nonzero, the note walk is aborted, and the return + * value from the callback is returned from for_each_note(). Hence, a zero + * return value from for_each_note() indicates that all notes were walked + * successfully. + * + * IMPORTANT: The callback function is NOT allowed to change the notes tree. + * In other words, the following functions can NOT be invoked (on the current + * notes tree) from within the callback: + * - add_note() + * - remove_note() + * - free_notes() + */ +typedef int each_note_fn(const unsigned char *object_sha1, + const unsigned char *note_sha1, char *note_path, + void *cb_data); +int for_each_note(int flags, each_note_fn fn, void *cb_data); + /* Free (and de-initialize) the internal notes tree structure */ void free_notes(void); |