You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
1 year ago
|
/*
|
||
|
|
* Copyright 2013 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_READER_H
|
||
|
|
#define BSON_READER_H
|
||
|
|
|
||
|
|
|
||
|
|
#include "bson/bson-compat.h"
|
||
|
|
#include "bson/bson-oid.h"
|
||
|
|
#include "bson/bson-types.h"
|
||
|
|
|
||
|
|
|
||
|
|
BSON_BEGIN_DECLS
|
||
|
|
|
||
|
|
|
||
|
|
#define BSON_ERROR_READER_BADFD 1
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*--------------------------------------------------------------------------
|
||
|
|
*
|
||
|
|
* bson_reader_read_func_t --
|
||
|
|
*
|
||
|
|
* This function is a callback used by bson_reader_t to read the
|
||
|
|
* next chunk of data from the underlying opaque file descriptor.
|
||
|
|
*
|
||
|
|
* This function is meant to operate similar to the read() function
|
||
|
|
* as part of libc on UNIX-like systems.
|
||
|
|
*
|
||
|
|
* Parameters:
|
||
|
|
* @handle: The handle to read from.
|
||
|
|
* @buf: The buffer to read into.
|
||
|
|
* @count: The number of bytes to read.
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* 0 for end of stream.
|
||
|
|
* -1 for read failure.
|
||
|
|
* Greater than zero for number of bytes read into @buf.
|
||
|
|
*
|
||
|
|
* Side effects:
|
||
|
|
* None.
|
||
|
|
*
|
||
|
|
*--------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef ssize_t (*bson_reader_read_func_t) (void *handle, /* IN */
|
||
|
|
void *buf, /* IN */
|
||
|
|
size_t count); /* IN */
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*--------------------------------------------------------------------------
|
||
|
|
*
|
||
|
|
* bson_reader_destroy_func_t --
|
||
|
|
*
|
||
|
|
* Destroy callback to release any resources associated with the
|
||
|
|
* opaque handle.
|
||
|
|
*
|
||
|
|
* Parameters:
|
||
|
|
* @handle: the handle provided to bson_reader_new_from_handle().
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* None.
|
||
|
|
*
|
||
|
|
* Side effects:
|
||
|
|
* None.
|
||
|
|
*
|
||
|
|
*--------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef void (*bson_reader_destroy_func_t) (void *handle); /* IN */
|
||
|
|
|
||
|
|
|
||
|
|
BSON_EXPORT (bson_reader_t *)
|
||
|
|
bson_reader_new_from_handle (void *handle,
|
||
|
|
bson_reader_read_func_t rf,
|
||
|
|
bson_reader_destroy_func_t df);
|
||
|
|
BSON_EXPORT (bson_reader_t *)
|
||
|
|
bson_reader_new_from_fd (int fd, bool close_on_destroy);
|
||
|
|
BSON_EXPORT (bson_reader_t *)
|
||
|
|
bson_reader_new_from_file (const char *path, bson_error_t *error);
|
||
|
|
BSON_EXPORT (bson_reader_t *)
|
||
|
|
bson_reader_new_from_data (const uint8_t *data, size_t length);
|
||
|
|
BSON_EXPORT (void)
|
||
|
|
bson_reader_destroy (bson_reader_t *reader);
|
||
|
|
BSON_EXPORT (void)
|
||
|
|
bson_reader_set_read_func (bson_reader_t *reader, bson_reader_read_func_t func);
|
||
|
|
BSON_EXPORT (void)
|
||
|
|
bson_reader_set_destroy_func (bson_reader_t *reader,
|
||
|
|
bson_reader_destroy_func_t func);
|
||
|
|
BSON_EXPORT (const bson_t *)
|
||
|
|
bson_reader_read (bson_reader_t *reader, bool *reached_eof);
|
||
|
|
BSON_EXPORT (off_t)
|
||
|
|
bson_reader_tell (bson_reader_t *reader);
|
||
|
|
BSON_EXPORT (void)
|
||
|
|
bson_reader_reset (bson_reader_t *reader);
|
||
|
|
|
||
|
|
BSON_END_DECLS
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* BSON_READER_H */
|