You've already forked mariadb-connector-c
mirror of
https://github.com/mariadb-corporation/mariadb-connector-c.git
synced 2025-08-07 02:42:49 +03:00
770cf2286a
ZSTD compression is now supported for connections to a MySQL Server 8.0. Compression algorithms are supported via compression plugins, which can be found in plugins/compress.
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/************************************************************************************
|
|
Copyright (C) 2022 MariaDB Corporation AB
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
This library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with this library; if not see <http://www.gnu.org/licenses>
|
|
or write to the Free Software Foundation, Inc.,
|
|
51 Franklin St., Fifth Floor, Boston, MA 02110, USA
|
|
|
|
*************************************************************************************/
|
|
|
|
#include <ma_global.h>
|
|
#include <ma_sys.h>
|
|
#include <mysql.h>
|
|
#include <mysql/client_plugin.h>
|
|
#include <string.h>
|
|
#include <memory.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <zlib.h>
|
|
|
|
static ma_compress_ctx *ma_zlib_ctx_init(int compression_level)
|
|
{
|
|
ma_compress_ctx *ctx;
|
|
|
|
if (!(ctx = (ma_compress_ctx *)calloc(1, sizeof(ma_compress_ctx))))
|
|
return NULL;
|
|
|
|
ctx->compression_level= (compression_level == COMPRESSION_LEVEL_DEFAULT) ?
|
|
Z_DEFAULT_COMPRESSION : compression_level;
|
|
return ctx;
|
|
}
|
|
|
|
static void ma_zlib_ctx_deinit(ma_compress_ctx *ctx)
|
|
{
|
|
free(ctx);
|
|
}
|
|
|
|
my_bool ma_zlib_compress(ma_compress_ctx *ctx, void *dst,
|
|
size_t *dst_len, void *source, size_t source_len)
|
|
{
|
|
int rc;
|
|
if (!ctx)
|
|
return 1;
|
|
|
|
if ((rc= compress2((Bytef *)dst, (uLongf *)dst_len, (Bytef *)source, (uLong)source_len,
|
|
ctx->compression_level)) != Z_OK)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
my_bool ma_zlib_decompress(ma_compress_ctx *ctx, void *dst, size_t *dst_len,
|
|
void *source, size_t *source_len)
|
|
{
|
|
int rc;
|
|
if (!ctx)
|
|
return 1;
|
|
|
|
rc= uncompress((Bytef*) dst, (uLongf *)dst_len, (Bytef*) source, (uLongf)*source_len);
|
|
|
|
if (rc != Z_OK)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifndef PLUGIN_DYNAMIC
|
|
MARIADB_COMPRESSION_PLUGIN zlib_client_plugin=
|
|
#else
|
|
MARIADB_COMPRESSION_PLUGIN _mysql_client_plugin_declaration_ =
|
|
#endif
|
|
{
|
|
MARIADB_CLIENT_COMPRESSION_PLUGIN,
|
|
MARIADB_CLIENT_COMPRESSION_PLUGIN_INTERFACE_VERSION,
|
|
"zlib",
|
|
"Georg Richter",
|
|
"zlib compresson plugin",
|
|
{0,1,0},
|
|
"LGPL",
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
ma_zlib_ctx_init,
|
|
ma_zlib_ctx_deinit,
|
|
ma_zlib_compress,
|
|
ma_zlib_decompress,
|
|
mysql_end_client_plugin;
|
|
|