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/*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* as published by the Free Software Foundation.
*
* In addition to the permissions in the GNU General Public License,
* the authors give you unlimited permission to link the compiled
* version of this file into combinations with other programs,
* and to distribute those combinations without any restriction
* coming from the use of this file. (The General Public License
* restrictions do apply in other respects; for example, they cover
* modification of the file, and distribution when not linked into
* a combined executable.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "git/odb.h"
struct git_odb {
/** Path to the "objects" directory. */
char *path;
/** Alternate databases to search. */
git_odb **alternates;
};
static int open_alternates(git_odb *db)
{
unsigned n = 0;
db->alternates = malloc(sizeof(*db->alternates) * (n + 1));
if (!db->alternates)
return GIT_ERROR;
db->alternates[n] = NULL;
return GIT_SUCCESS;
}
int git_odb_open(git_odb **out, const char *objects_dir)
{
git_odb *db = malloc(sizeof(*db));
if (!db)
return GIT_ERROR;
db->path = strdup(objects_dir);
if (!db->path) {
free(db);
return GIT_ERROR;
}
db->alternates = NULL;
*out = db;
return GIT_SUCCESS;
}
void git_odb_close(git_odb *db)
{
if (!db)
return;
if (db->alternates) {
git_odb **alt;
for (alt = db->alternates; *alt; alt++)
git_odb_close(*alt);
free(db->alternates);
}
free(db->path);
free(db);
}
int git_odb_read(
git_sobj *out,
git_odb *db,
const git_oid *id)
{
attempt:
if (!git_odb__read_packed(out, db, id))
return GIT_SUCCESS;
if (!git_odb__read_loose(out, db, id))
return GIT_SUCCESS;
if (!db->alternates && !open_alternates(db))
goto attempt;
out->data = NULL;
return GIT_ENOTFOUND;
}
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