/*
 * Copyright 2009-present MongoDB, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <bson/bson-prelude.h>

#ifndef BSON_WRITER_H
#define BSON_WRITER_H

#include <bson/bson_t.h>
#include <bson/memory.h>

#include <stdbool.h>

BSON_BEGIN_DECLS

/**
 * bson_writer_t:
 *
 * The bson_writer_t structure is a helper for writing a series of BSON
 * documents to a single malloc() buffer. You can provide a realloc() style
 * function to grow the buffer as you go.
 *
 * This is useful if you want to build a series of BSON documents right into
 * the target buffer for an outgoing packet. The offset parameter allows you to
 * start at an offset of the target buffer.
 */
typedef struct _bson_writer_t bson_writer_t;

BSON_EXPORT(bson_writer_t *)
bson_writer_new(uint8_t **buf, size_t *buflen, size_t offset, bson_realloc_func realloc_func, void *realloc_func_ctx);
BSON_EXPORT(void)
bson_writer_destroy(bson_writer_t *writer);
BSON_EXPORT(size_t)
bson_writer_get_length(bson_writer_t *writer);
BSON_EXPORT(bool)
bson_writer_begin(bson_writer_t *writer, bson_t **bson);
BSON_EXPORT(void)
bson_writer_end(bson_writer_t *writer);
BSON_EXPORT(void)
bson_writer_rollback(bson_writer_t *writer);

BSON_END_DECLS

#endif /* BSON_WRITER_H */
