045113a53e
Entries that belong to the base index should not be freed. Mark CE_REMOVE to track them. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
#include "cache.h"
|
|
#include "split-index.h"
|
|
|
|
struct split_index *init_split_index(struct index_state *istate)
|
|
{
|
|
if (!istate->split_index) {
|
|
istate->split_index = xcalloc(1, sizeof(*istate->split_index));
|
|
istate->split_index->refcount = 1;
|
|
}
|
|
return istate->split_index;
|
|
}
|
|
|
|
int read_link_extension(struct index_state *istate,
|
|
const void *data_, unsigned long sz)
|
|
{
|
|
const unsigned char *data = data_;
|
|
struct split_index *si;
|
|
if (sz < 20)
|
|
return error("corrupt link extension (too short)");
|
|
si = init_split_index(istate);
|
|
hashcpy(si->base_sha1, data);
|
|
data += 20;
|
|
sz -= 20;
|
|
if (sz)
|
|
return error("garbage at the end of link extension");
|
|
return 0;
|
|
}
|
|
|
|
int write_link_extension(struct strbuf *sb,
|
|
struct index_state *istate)
|
|
{
|
|
struct split_index *si = istate->split_index;
|
|
strbuf_add(sb, si->base_sha1, 20);
|
|
return 0;
|
|
}
|
|
|
|
static void mark_base_index_entries(struct index_state *base)
|
|
{
|
|
int i;
|
|
/*
|
|
* To keep track of the shared entries between
|
|
* istate->base->cache[] and istate->cache[], base entry
|
|
* position is stored in each base entry. All positions start
|
|
* from 1 instead of 0, which is resrved to say "this is a new
|
|
* entry".
|
|
*/
|
|
for (i = 0; i < base->cache_nr; i++)
|
|
base->cache[i]->index = i + 1;
|
|
}
|
|
|
|
void merge_base_index(struct index_state *istate)
|
|
{
|
|
struct split_index *si = istate->split_index;
|
|
|
|
mark_base_index_entries(si->base);
|
|
istate->cache_nr = si->base->cache_nr;
|
|
ALLOC_GROW(istate->cache, istate->cache_nr, istate->cache_alloc);
|
|
memcpy(istate->cache, si->base->cache,
|
|
sizeof(*istate->cache) * istate->cache_nr);
|
|
}
|
|
|
|
void prepare_to_write_split_index(struct index_state *istate)
|
|
{
|
|
struct split_index *si = init_split_index(istate);
|
|
/* take cache[] out temporarily */
|
|
si->saved_cache_nr = istate->cache_nr;
|
|
istate->cache_nr = 0;
|
|
}
|
|
|
|
void finish_writing_split_index(struct index_state *istate)
|
|
{
|
|
struct split_index *si = init_split_index(istate);
|
|
istate->cache_nr = si->saved_cache_nr;
|
|
}
|
|
|
|
void discard_split_index(struct index_state *istate)
|
|
{
|
|
struct split_index *si = istate->split_index;
|
|
if (!si)
|
|
return;
|
|
istate->split_index = NULL;
|
|
si->refcount--;
|
|
if (si->refcount)
|
|
return;
|
|
if (si->base) {
|
|
discard_index(si->base);
|
|
free(si->base);
|
|
}
|
|
free(si);
|
|
}
|
|
|
|
void save_or_free_index_entry(struct index_state *istate, struct cache_entry *ce)
|
|
{
|
|
if (ce->index &&
|
|
istate->split_index &&
|
|
istate->split_index->base &&
|
|
ce->index <= istate->split_index->base->cache_nr &&
|
|
ce == istate->split_index->base->cache[ce->index - 1])
|
|
ce->ce_flags |= CE_REMOVE;
|
|
else
|
|
free(ce);
|
|
}
|