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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "git2/object.h"
#include "git2/sys/odb_backend.h"
#include "fileops.h"
#include "hash.h"
#include "odb.h"
#include "array.h"
#include "oidmap.h"
#include "git2/odb_backend.h"
#include "git2/types.h"
#include "git2/pack.h"
GIT__USE_OIDMAP
struct memobject {
git_oid oid;
size_t len;
git_otype type;
char data[];
};
struct memory_packer_db {
git_odb_backend parent;
git_oidmap *objects;
git_array_t(struct memobject *) commits;
};
static int impl__write(git_odb_backend *_backend, const git_oid *oid, const void *data, size_t len, git_otype type)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
struct memobject *obj = NULL;
khiter_t pos;
size_t alloc_len;
int rval;
pos = kh_put(oid, db->objects, oid, &rval);
if (rval < 0)
return -1;
if (rval == 0)
return 0;
GITERR_CHECK_ALLOC_ADD(&alloc_len, sizeof(struct memobject), len);
obj = git__malloc(alloc_len);
GITERR_CHECK_ALLOC(obj);
memcpy(obj->data, data, len);
git_oid_cpy(&obj->oid, oid);
obj->len = len;
obj->type = type;
kh_key(db->objects, pos) = &obj->oid;
kh_val(db->objects, pos) = obj;
if (type == GIT_OBJ_COMMIT) {
struct memobject **store = git_array_alloc(db->commits);
GITERR_CHECK_ALLOC(store);
*store = obj;
}
return 0;
}
static int impl__exists(git_odb_backend *backend, const git_oid *oid)
{
struct memory_packer_db *db = (struct memory_packer_db *)backend;
khiter_t pos;
pos = kh_get(oid, db->objects, oid);
if (pos != kh_end(db->objects))
return 1;
return 0;
}
static int impl__read(void **buffer_p, size_t *len_p, git_otype *type_p, git_odb_backend *backend, const git_oid *oid)
{
struct memory_packer_db *db = (struct memory_packer_db *)backend;
struct memobject *obj = NULL;
khiter_t pos;
pos = kh_get(oid, db->objects, oid);
if (pos == kh_end(db->objects))
return GIT_ENOTFOUND;
obj = kh_val(db->objects, pos);
*len_p = obj->len;
*type_p = obj->type;
*buffer_p = git__malloc(obj->len);
GITERR_CHECK_ALLOC(*buffer_p);
memcpy(*buffer_p, obj->data, obj->len);
return 0;
}
static int impl__read_header(size_t *len_p, git_otype *type_p, git_odb_backend *backend, const git_oid *oid)
{
struct memory_packer_db *db = (struct memory_packer_db *)backend;
struct memobject *obj = NULL;
khiter_t pos;
pos = kh_get(oid, db->objects, oid);
if (pos == kh_end(db->objects))
return GIT_ENOTFOUND;
obj = kh_val(db->objects, pos);
*len_p = obj->len;
*type_p = obj->type;
return 0;
}
int git_mempack_dump(git_buf *pack, git_repository *repo, git_odb_backend *_backend)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
git_packbuilder *packbuilder;
uint32_t i;
int err = -1;
if (git_packbuilder_new(&packbuilder, repo) < 0)
return -1;
for (i = 0; i < db->commits.size; ++i) {
struct memobject *commit = db->commits.ptr[i];
err = git_packbuilder_insert_commit(packbuilder, &commit->oid);
if (err < 0)
goto cleanup;
}
err = git_packbuilder_write_buf(pack, packbuilder);
cleanup:
git_packbuilder_free(packbuilder);
return err;
}
void git_mempack_reset(git_odb_backend *_backend)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
struct memobject *object = NULL;
kh_foreach_value(db->objects, object, {
git__free(object);
});
git_array_clear(db->commits);
}
static void impl__free(git_odb_backend *_backend)
{
git_mempack_reset(_backend);
git__free(_backend);
}
int git_mempack_new(git_odb_backend **out)
{
struct memory_packer_db *db;
assert(out);
db = git__calloc(1, sizeof(struct memory_packer_db));
GITERR_CHECK_ALLOC(db);
db->objects = git_oidmap_alloc();
db->parent.read = &impl__read;
db->parent.write = &impl__write;
db->parent.read_header = &impl__read_header;
db->parent.exists = &impl__exists;
db->parent.free = &impl__free;
*out = (git_odb_backend *)db;
return 0;
}
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