14bb6cf99b
Several filters use a match-or-ignore logic with two regular expressions when filtering queries. This commit adds a convenience function for this task. Also adds a convenience function for reading several regular expression parameters at once, compiling them and saving the code while checking for errors. Also, use the new functions in QLA and CCR filters.
81 lines
2.7 KiB
C
81 lines
2.7 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: 2020-01-01
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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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/**
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* @file pcre2.h - Utility functions for regular expression matching
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* with the bundled PCRE2 library.
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*/
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#include <maxscale/cdefs.h>
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MXS_BEGIN_DECLS
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#if defined(PCRE2_CODE_UNIT_WIDTH)
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#error PCRE2_CODE_UNIT_WIDTH already defined. Do not define, and include <maxscale/pcre2.h>.
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#else
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#define PCRE2_CODE_UNIT_WIDTH 8
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#endif
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#include <pcre2.h>
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/**
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* Print an error message explaining an error code.
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* @param errorcode value returned by pcre2 functions
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*/
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#define MXS_PCRE2_PRINT_ERROR(errorcode)\
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mxs_pcre2_print_error(errorcode, MXS_MODULE_NAME, __FILE__,__LINE__, __func__)
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typedef enum
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{
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MXS_PCRE2_MATCH,
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MXS_PCRE2_NOMATCH,
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MXS_PCRE2_ERROR
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} mxs_pcre2_result_t;
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mxs_pcre2_result_t mxs_pcre2_substitute(pcre2_code *re, const char *subject,
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const char *replace, char** dest, size_t* size);
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mxs_pcre2_result_t mxs_pcre2_simple_match(const char* pattern, const char* subject,
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int options, int* error);
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/**
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* Print an error message explaining an error code. Best used through the macro
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* MXS_PCRE2_PRINT_ERROR
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*/
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void mxs_pcre2_print_error(int errorcode, const char *module_name, const char *filename,
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int line_num, const char* func_name);
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/**
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* Check that @c subject is valid. A valid subject matches @c re_match yet does
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* not match @c re_exclude. If an error occurs, an error code is written to
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* @c match_error_out.
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*
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* @param re_match If not NULL, the subject must match this to be valid. If NULL,
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* all inputs are considered valid.
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* @param re_exclude If not NULL, will invalidate a matching subject. Even subjects
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* validated by @c re_match can be invalidated. If NULL, invalidates nothing.
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* @param md PCRE2 match data block
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* @param subject Subject string. Should NOT be an empty string.
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* @param length Length of subject. Can be zero for 0-terminated strings.
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* @param calling_module Which module the function was called from. Can be NULL.
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* Used for log messages.
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*
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* @return True, if subject is considered valid. False if subject is not valid or
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* an error occurred.
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*/
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bool mxs_pcre2_check_match_exclude(pcre2_code* re_match, pcre2_code* re_exclude,
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pcre2_match_data* md, const char* subject,
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int length, const char* calling_module);
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MXS_END_DECLS
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