91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
#pragma once
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/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl.
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*
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* Change Date: 2019-07-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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/**
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* @file resultset.h The MaxScale generic result set mechanism
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 17/02/15 Mark Riddoch Initial implementation
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*
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* @endverbatim
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*/
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#include <maxscale/cdefs.h>
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#include <maxscale/dcb.h>
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MXS_BEGIN_DECLS
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/**
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* Column types
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*/
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typedef enum
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{
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COL_TYPE_VARCHAR = 0x0f,
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COL_TYPE_VARSTRING = 0xfd
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} RESULT_COL_TYPE;
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/**
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* The result set column definition. Each result set has an order linked
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* list of column definitions.
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*/
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typedef struct resultcolumn
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{
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char *name; /*< Column name */
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int len; /*< Column length */
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RESULT_COL_TYPE type; /*< Column type */
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struct resultcolumn *next; /*< next column */
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} RESULT_COLUMN;
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/**
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* A representation of a row within a result set.
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*/
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typedef struct resultrow
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{
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int n_cols; /*< No. of columns in row */
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char **cols; /*< The columns themselves */
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} RESULT_ROW;
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struct resultset;
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/**
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* Type of callback function used to supply each row
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*/
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typedef RESULT_ROW * (*RESULT_ROW_CB)(struct resultset *, void *);
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/**
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* The representation of the result set itself.
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*/
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typedef struct resultset
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{
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int n_cols; /*< No. of columns */
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RESULT_COLUMN *column; /*< Linked list of column definitions */
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RESULT_ROW_CB fetchrow; /*< Fetch a row for the result set */
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void *userdata; /*< User data for the fetch row call */
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} RESULTSET;
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extern RESULTSET *resultset_create(RESULT_ROW_CB, void *);
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extern void resultset_free(RESULTSET *);
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extern int resultset_add_column(RESULTSET *, const char *, int, RESULT_COL_TYPE);
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extern void resultset_column_free(RESULT_COLUMN *);
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extern RESULT_ROW *resultset_make_row(RESULTSET *);
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extern void resultset_free_row(RESULT_ROW *);
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extern int resultset_row_set(RESULT_ROW *, int, const char *);
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extern void resultset_stream_mysql(RESULTSET *, DCB *);
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extern void resultset_stream_json(RESULTSET *, DCB *);
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MXS_END_DECLS
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