couchstore_error_t tree_file_open(tree_file* file,
const char *filename,
int openflags,
const couch_file_ops *ops)
{
couchstore_error_t errcode = COUCHSTORE_SUCCESS;
/* Sanity check input parameters */
if (filename == NULL || file == NULL || ops == NULL ||
ops->version != 4 || ops->constructor == NULL || ops->open == NULL ||
ops->close == NULL || ops->pread == NULL ||
ops->pwrite == NULL || ops->goto_eof == NULL ||
ops->sync == NULL || ops->destructor == NULL) {
return COUCHSTORE_ERROR_INVALID_ARGUMENTS;
}
memset(file, 0, sizeof(*file));
file->path = strdup(filename);
error_unless(file->path, COUCHSTORE_ERROR_ALLOC_FAIL);
file->ops = couch_get_buffered_file_ops(ops, &file->handle);
error_unless(file->ops, COUCHSTORE_ERROR_ALLOC_FAIL);
error_pass(file->ops->open(&file->handle, filename, openflags));
cleanup:
return errcode;
}
LIBCOUCHSTORE_API
couchstore_error_t couchstore_open_db_ex(const char *filename,
couchstore_open_flags flags,
const couch_file_ops *ops,
Db **pDb)
{
couchstore_error_t errcode = COUCHSTORE_SUCCESS;
Db *db;
int openflags;
/* Sanity check input parameters */
if (filename == NULL || pDb == NULL || ops == NULL ||
ops->version != 3 || ops->constructor == NULL || ops->open == NULL ||
ops->close == NULL || ops->pread == NULL ||
ops->pwrite == NULL || ops->goto_eof == NULL ||
ops->sync == NULL || ops->destructor == NULL ||
((flags & COUCHSTORE_OPEN_FLAG_RDONLY) &&
(flags & COUCHSTORE_OPEN_FLAG_CREATE))) {
return COUCHSTORE_ERROR_INVALID_ARGUMENTS;
}
if ((db = calloc(1, sizeof(Db))) == NULL) {
return COUCHSTORE_ERROR_ALLOC_FAIL;
}
if (flags & COUCHSTORE_OPEN_FLAG_RDONLY) {
openflags = O_RDONLY;
} else {
openflags = O_RDWR;
}
if (flags & COUCHSTORE_OPEN_FLAG_CREATE) {
openflags |= O_CREAT;
}
db->filename = strdup(filename);
error_unless(db->filename, COUCHSTORE_ERROR_ALLOC_FAIL);
db->file_ops = couch_get_buffered_file_ops(ops, &db->file_handle);
error_unless(db->file_ops, COUCHSTORE_ERROR_ALLOC_FAIL);
error_pass(db->file_ops->open(&db->file_handle, filename, openflags));
if ((db->file_pos = db->file_ops->goto_eof(db->file_handle)) == 0) {
/* This is an empty file. Create a new fileheader unless the
* user wanted a read-only version of the file
*/
if (flags & COUCHSTORE_OPEN_FLAG_RDONLY) {
error_pass(COUCHSTORE_ERROR_NO_HEADER);
} else {
error_pass(create_header(db));
}
} else {
error_pass(find_header(db));
}
*pDb = db;
return COUCHSTORE_SUCCESS;
cleanup:
couchstore_close_db(db);
return errcode;
}
