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/******************************************************
Copyright (c) 2011-2017 Percona LLC and/or its affiliates.
The xbstream format interface.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program 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; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*******************************************************/
#ifndef XBSTREAM_H
#define XBSTREAM_H
#include <my_base.h>
/* Magic value in a chunk header */
#define XB_STREAM_CHUNK_MAGIC "XBSTCK01"
/* Chunk flags */
/* Chunk can be ignored if unknown version/format */
#define XB_STREAM_FLAG_IGNORABLE 0x01
/* Magic + flags + type + path len */
#define CHUNK_HEADER_CONSTANT_LEN ((sizeof(XB_STREAM_CHUNK_MAGIC) - 1) + \
1 + 1 + 4)
#define CHUNK_TYPE_OFFSET (sizeof(XB_STREAM_CHUNK_MAGIC) - 1 + 1)
#define PATH_LENGTH_OFFSET (sizeof(XB_STREAM_CHUNK_MAGIC) - 1 + 1 + 1)
typedef struct xb_wstream_struct xb_wstream_t;
typedef struct xb_wstream_file_struct xb_wstream_file_t;
typedef enum {
XB_STREAM_FMT_NONE,
XB_STREAM_FMT_XBSTREAM
} xb_stream_fmt_t;
/************************************************************************
Write interface. */
typedef ssize_t xb_stream_write_callback(xb_wstream_file_t *file,
void *userdata,
const void *buf, size_t len);
xb_wstream_t *xb_stream_write_new(void);
xb_wstream_file_t *xb_stream_write_open(xb_wstream_t *stream, const char *path,
MY_STAT *mystat, void *userdata,
xb_stream_write_callback *onwrite);
int xb_stream_write_data(xb_wstream_file_t *file, const void *buf, size_t len);
int xb_stream_write_close(xb_wstream_file_t *file);
int xb_stream_write_done(xb_wstream_t *stream);
/************************************************************************
Read interface. */
typedef enum {
XB_STREAM_READ_CHUNK,
XB_STREAM_READ_EOF,
XB_STREAM_READ_ERROR
} xb_rstream_result_t;
typedef enum {
XB_CHUNK_TYPE_UNKNOWN = '\0',
XB_CHUNK_TYPE_PAYLOAD = 'P',
XB_CHUNK_TYPE_EOF = 'E'
} xb_chunk_type_t;
typedef struct xb_rstream_struct xb_rstream_t;
typedef struct {
uchar flags;
xb_chunk_type_t type;
uint pathlen;
char path[FN_REFLEN];
size_t length;
my_off_t offset;
my_off_t checksum_offset;
void *data;
ulong checksum;
size_t buflen;
} xb_rstream_chunk_t;
xb_rstream_t *xb_stream_read_new(void);
xb_rstream_result_t xb_stream_read_chunk(xb_rstream_t *stream,
xb_rstream_chunk_t *chunk);
int xb_stream_read_done(xb_rstream_t *stream);
xb_rstream_result_t xb_stream_validate_checksum(xb_rstream_chunk_t *chunk);
#endif
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