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-rw-r--r--libmariadb/plugins/compress/c_zlib.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/libmariadb/plugins/compress/c_zlib.c b/libmariadb/plugins/compress/c_zlib.c
new file mode 100644
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+++ b/libmariadb/plugins/compress/c_zlib.c
@@ -0,0 +1,99 @@
+/************************************************************************************
+ 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;
+