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#include "cache.h"
struct index_state;
struct strbuf;
struct ewah_bitmap;
struct split_index {
struct object_id base_oid;
struct index_state *base;
struct ewah_bitmap *delete_bitmap;
struct ewah_bitmap *replace_bitmap;
struct cache_entry **saved_cache;
unsigned int saved_cache_nr;
unsigned int nr_deletions;
unsigned int nr_replacements;
int refcount;
struct split_index *init_split_index(struct index_state *istate);
void save_or_free_index_entry(struct index_state *istate, struct cache_entry *ce);
void replace_index_entry_in_base(struct index_state *istate,
struct cache_entry *old,
struct cache_entry *new_entry);
int read_link_extension(struct index_state *istate,
const void *data, unsigned long sz);
int write_link_extension(struct strbuf *sb,
struct index_state *istate);
void move_cache_to_base_index(struct index_state *istate);
void merge_base_index(struct index_state *istate);
void prepare_to_write_split_index(struct index_state *istate);
void finish_writing_split_index(struct index_state *istate);
void discard_split_index(struct index_state *istate);
void add_split_index(struct index_state *istate);
void remove_split_index(struct index_state *istate);