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Diffstat (limited to 'object.h')
-rw-r--r-- | object.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/object.h b/object.h new file mode 100644 index 0000000..82877c8 --- /dev/null +++ b/object.h @@ -0,0 +1,82 @@ +#ifndef OBJECT_H +#define OBJECT_H + +struct object_list { + struct object *item; + struct object_list *next; +}; + +struct object_refs { + unsigned count; + struct object *ref[FLEX_ARRAY]; /* more */ +}; + +struct object_array { + unsigned int nr; + unsigned int alloc; + struct object_array_entry { + struct object *item; + const char *name; + unsigned mode; + } *objects; +}; + +#define TYPE_BITS 3 +#define FLAG_BITS 27 + +/* + * The object type is stored in 3 bits. + */ +struct object { + unsigned parsed : 1; + unsigned used : 1; + unsigned type : TYPE_BITS; + unsigned flags : FLAG_BITS; + unsigned char sha1[20]; +}; + +extern const char *typename(unsigned int type); +extern int type_from_string(const char *str); + +extern unsigned int get_max_object_index(void); +extern struct object *get_indexed_object(unsigned int); + +/* + * This can be used to see if we have heard of the object before, but + * it can return "yes we have, and here is a half-initialised object" + * for an object that we haven't loaded/parsed yet. + * + * When parsing a commit to create an in-core commit object, its + * parents list holds commit objects that represent its parents, but + * they are expected to be lazily initialized and do not know what + * their trees or parents are yet. When this function returns such a + * half-initialised objects, the caller is expected to initialize them + * by calling parse_object() on them. + */ +struct object *lookup_object(const unsigned char *sha1); + +extern void *create_object(const unsigned char *sha1, int type, void *obj); + +/** Returns the object, having parsed it to find out what it is. **/ +struct object *parse_object(const unsigned char *sha1); + +/* Given the result of read_sha1_file(), returns the object after + * parsing it. eaten_p indicates if the object has a borrowed copy + * of buffer and the caller should not free() it. + */ +struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p); + +/** Returns the object, with potentially excess memory allocated. **/ +struct object *lookup_unknown_object(const unsigned char *sha1); + +struct object_list *object_list_insert(struct object *item, + struct object_list **list_p); + +int object_list_contains(struct object_list *list, struct object *obj); + +/* Object array handling .. */ +void add_object_array(struct object *obj, const char *name, struct object_array *array); +void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode); +void object_array_remove_duplicates(struct object_array *); + +#endif /* OBJECT_H */ |