4 * Hashing names in the index state
6 * Copyright (C) 2008 Linus Torvalds
8 #define NO_THE_INDEX_COMPATIBILITY_MACROS
11 static unsigned int hash_name(const char *name, int namelen)
13 unsigned int hash = 0x123;
16 unsigned char c = *name++;
22 static void hash_index_entry(struct index_state *istate, struct cache_entry *ce)
27 if (ce->ce_flags & CE_HASHED)
29 ce->ce_flags |= CE_HASHED;
31 hash = hash_name(ce->name, ce_namelen(ce));
32 pos = insert_hash(hash, ce, &istate->name_hash);
39 static void lazy_init_name_hash(struct index_state *istate)
43 if (istate->name_hash_initialized)
45 for (nr = 0; nr < istate->cache_nr; nr++)
46 hash_index_entry(istate, istate->cache[nr]);
47 istate->name_hash_initialized = 1;
50 void add_name_hash(struct index_state *istate, struct cache_entry *ce)
52 ce->ce_flags &= ~CE_UNHASHED;
53 if (istate->name_hash_initialized)
54 hash_index_entry(istate, ce);
57 struct cache_entry *index_name_exists(struct index_state *istate, const char *name, int namelen)
59 unsigned int hash = hash_name(name, namelen);
60 struct cache_entry *ce;
62 lazy_init_name_hash(istate);
63 ce = lookup_hash(hash, &istate->name_hash);
66 if (!(ce->ce_flags & CE_UNHASHED)) {
67 if (!cache_name_compare(name, namelen, ce->name, ce->ce_flags))