7469c5be52
This functionality is needed both in the query classifier, where it was first created, and in the cache.
87 lines
3.5 KiB
C
87 lines
3.5 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/bsl11.
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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 modutil.h A set of useful routines for module writers
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*/
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#include <maxscale/cdefs.h>
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#include <maxscale/buffer.h>
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#include <maxscale/dcb.h>
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#include <string.h>
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#include <maxscale/pcre2.h>
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MXS_BEGIN_DECLS
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#define PTR_IS_RESULTSET(b) (b[0] == 0x01 && b[1] == 0x0 && b[2] == 0x0 && b[3] == 0x01)
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#define PTR_IS_EOF(b) (b[0] == 0x05 && b[1] == 0x0 && b[2] == 0x0 && b[4] == 0xfe)
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#define PTR_IS_OK(b) (b[4] == 0x00)
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#define PTR_IS_ERR(b) (b[4] == 0xff)
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#define PTR_IS_LOCAL_INFILE(b) (b[4] == 0xfb)
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#define IS_FULL_RESPONSE(buf) (modutil_count_signal_packets(buf,0,0) == 2)
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#define PTR_EOF_MORE_RESULTS(b) ((PTR_IS_EOF(b) && ptr[7] & 0x08))
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extern int modutil_is_SQL(GWBUF *);
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extern int modutil_is_SQL_prepare(GWBUF *);
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extern int modutil_extract_SQL(GWBUF *, char **, int *);
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extern int modutil_MySQL_Query(GWBUF *, char **, int *, int *);
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extern char* modutil_get_SQL(GWBUF *);
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extern GWBUF* modutil_replace_SQL(GWBUF *, char *);
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extern char* modutil_get_query(GWBUF* buf);
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extern int modutil_send_mysql_err_packet(DCB *, int, int, int, const char *, const char *);
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GWBUF* modutil_get_next_MySQL_packet(GWBUF** p_readbuf);
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GWBUF* modutil_get_complete_packets(GWBUF** p_readbuf);
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int modutil_MySQL_query_len(GWBUF* buf, int* nbytes_missing);
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void modutil_reply_parse_error(DCB* backend_dcb, char* errstr, uint32_t flags);
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void modutil_reply_auth_error(DCB* backend_dcb, char* errstr, uint32_t flags);
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int modutil_count_statements(GWBUF* buffer);
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GWBUF* modutil_create_query(const char* query);
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GWBUF* modutil_create_mysql_err_msg(int packet_number,
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int affected_rows,
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int merrno,
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const char *statemsg,
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const char *msg);
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int modutil_count_signal_packets(GWBUF*, int, int, int*);
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mxs_pcre2_result_t modutil_mysql_wildcard_match(const char* pattern, const char* string);
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/**
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* Given a buffer containing a MySQL statement, this function will return
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* a pointer to the first character that is not whitespace. In this context,
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* comments are also counted as whitespace. For instance:
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*
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* "SELECT" => "SELECT"
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* " SELECT => "SELECT"
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* " / * A comment * / SELECT" => "SELECT"
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* "-- comment\nSELECT" => "SELECT"
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*
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* @param sql Pointer to buffer containing a MySQL statement
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* @param len Length of sql.
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*
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* @return The first non whitespace (including comments) character. If the
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* entire buffer is only whitespace, the returned pointer will point
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* to the character following the buffer (i.e. sql + len).
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*/
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char* modutil_MySQL_bypass_whitespace(char* sql, size_t len);
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/** Character and token searching functions */
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char* strnchr_esc(char* ptr, char c, int len);
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char* strnchr_esc_mysql(char* ptr, char c, int len);
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bool is_mysql_statement_end(const char* start, int len);
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bool is_mysql_sp_end(const char* start, int len);
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char* modutil_get_canonical(GWBUF* querybuf);
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MXS_END_DECLS
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