diff options
Diffstat (limited to 'notes.h')
| -rw-r--r-- | notes.h | 81 |
1 files changed, 52 insertions, 29 deletions
@@ -2,6 +2,21 @@ #define NOTES_H /* + * Notes tree object + * + * Encapsulates the internal notes tree structure associated with a notes ref. + * Whenever a struct notes_tree pointer is required below, you may pass NULL in + * order to use the default/internal notes tree. E.g. you only need to pass a + * non-NULL value if you need to refer to several different notes trees + * simultaneously. + */ +extern struct notes_tree { + struct int_node *root; + char *ref; + int initialized; +} default_notes_tree; + +/* * Flags controlling behaviour of notes tree initialization * * Default behaviour is to initialize the notes tree from the tree object @@ -10,48 +25,54 @@ #define NOTES_INIT_EMPTY 1 /* - * Initialize internal notes tree structure with the notes tree at the given + * Initialize the given notes_tree with the notes tree structure at the given * ref. If given ref is NULL, the value of the $GIT_NOTES_REF environment * variable is used, and if that is missing, the default notes ref is used * ("refs/notes/commits"). * - * If you need to re-intialize the internal notes tree structure (e.g. loading - * from a different notes ref), please first de-initialize the current notes - * tree by calling free_notes(). + * If you need to re-intialize a notes_tree structure (e.g. when switching from + * one notes ref to another), you must first de-initialize the notes_tree + * structure by calling free_notes(struct notes_tree *). + * + * If you pass t == NULL, the default internal notes_tree will be initialized. + * + * Precondition: The notes_tree structure is zeroed (this can be achieved with + * memset(t, 0, sizeof(struct notes_tree))) */ -void init_notes(const char *notes_ref, int flags); +void init_notes(struct notes_tree *t, const char *notes_ref, int flags); /* - * Add the given note object to the internal notes tree structure + * Add the given note object to the given notes_tree structure * - * IMPORTANT: The changes made by add_note() to the internal notes tree structure + * IMPORTANT: The changes made by add_note() to the given notes_tree structure * are not persistent until a subsequent call to write_notes_tree() returns * zero. */ -void add_note(const unsigned char *object_sha1, +void add_note(struct notes_tree *t, const unsigned char *object_sha1, const unsigned char *note_sha1); /* - * Remove the given note object from the internal notes tree structure + * Remove the given note object from the given notes_tree structure * - * IMPORTANT: The changes made by remove_note() to the internal notes tree + * IMPORTANT: The changes made by remove_note() to the given notes_tree * structure are not persistent until a subsequent call to write_notes_tree() * returns zero. */ -void remove_note(const unsigned char *object_sha1); +void remove_note(struct notes_tree *t, const unsigned char *object_sha1); /* * Get the note object SHA1 containing the note data for the given object * * Return NULL if the given object has no notes. */ -const unsigned char *get_note(const unsigned char *object_sha1); +const unsigned char *get_note(struct notes_tree *t, + 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. + * in the given 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 @@ -75,7 +96,7 @@ const unsigned char *get_note(const unsigned char *object_sha1); #define FOR_EACH_NOTE_YIELD_SUBTREES 2 /* - * Invoke the specified callback function for each note + * Invoke the specified callback function for each note in the given notes_tree * * 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 @@ -92,30 +113,30 @@ const unsigned char *get_note(const unsigned char *object_sha1); 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); +int for_each_note(struct notes_tree *t, int flags, each_note_fn fn, + void *cb_data); /* - * Write the internal notes tree structure to the object database + * Write the given notes_tree structure to the object database * - * Creates a new tree object encapsulating the current state of the - * internal notes tree, and stores its SHA1 into the 'result' argument. + * Creates a new tree object encapsulating the current state of the given + * notes_tree, and stores its SHA1 into the 'result' argument. * * Returns zero on success, non-zero on failure. * - * IMPORTANT: Changes made to the internal notes tree structure are not - * persistent until this function has returned zero. Please also remember - * to create a corresponding commit object, and update the appropriate - * notes ref. + * IMPORTANT: Changes made to the given notes_tree are not persistent until + * this function has returned zero. Please also remember to create a + * corresponding commit object, and update the appropriate notes ref. */ -int write_notes_tree(unsigned char *result); +int write_notes_tree(struct notes_tree *t, unsigned char *result); /* - * Free (and de-initialize) the internal notes tree structure + * Free (and de-initialize) the given notes_tree structure * - * IMPORTANT: Changes made to the notes tree since the last, successful + * IMPORTANT: Changes made to the given notes_tree since the last, successful * call to write_notes_tree() will be lost. */ -void free_notes(void); +void free_notes(struct notes_tree *t); /* Flags controlling how notes are formatted */ #define NOTES_SHOW_HEADER 1 @@ -124,12 +145,14 @@ void free_notes(void); /* * Fill the given strbuf with the notes associated with the given object. * - * If the internal notes structure is not initialized, it will be auto- + * If the given notes_tree structure is not initialized, it will be auto- * initialized to the default value (see documentation for init_notes() above). + * If the given notes_tree is NULL, the internal/default notes_tree will be + * used instead. * * 'flags' is a bitwise combination of the above formatting flags. */ -void format_note(const unsigned char *object_sha1, struct strbuf *sb, - const char *output_encoding, int flags); +void format_note(struct notes_tree *t, const unsigned char *object_sha1, + struct strbuf *sb, const char *output_encoding, int flags); #endif |