2 * collectd - src/utils_match.h
3 * Copyright (C) 2008-2014 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Florian octo Forster <octo at verplant.org>
24 #define UTILS_MATCH_H 1
31 #define UTILS_MATCH_DS_TYPE_GAUGE 0x10
32 #define UTILS_MATCH_DS_TYPE_COUNTER 0x20
33 #define UTILS_MATCH_DS_TYPE_DERIVE 0x40
34 #define UTILS_MATCH_DS_TYPE_ABSOLUTE 0x80
36 #define UTILS_MATCH_CF_GAUGE_AVERAGE 0x01
37 #define UTILS_MATCH_CF_GAUGE_MIN 0x02
38 #define UTILS_MATCH_CF_GAUGE_MAX 0x04
39 #define UTILS_MATCH_CF_GAUGE_LAST 0x08
41 #define UTILS_MATCH_CF_COUNTER_SET 0x01
42 #define UTILS_MATCH_CF_COUNTER_ADD 0x02
43 #define UTILS_MATCH_CF_COUNTER_INC 0x04
45 #define UTILS_MATCH_CF_DERIVE_SET 0x01
46 #define UTILS_MATCH_CF_DERIVE_ADD 0x02
47 #define UTILS_MATCH_CF_DERIVE_INC 0x04
49 #define UTILS_MATCH_CF_ABSOLUTE_SET 0x01
50 #define UTILS_MATCH_CF_ABSOLUTE_ADD 0x02
51 #define UTILS_MATCH_CF_ABSOLUTE_INC 0x04
57 typedef struct cu_match_s cu_match_t;
59 struct cu_match_value_s
63 unsigned int values_num;
65 typedef struct cu_match_value_s cu_match_value_t;
72 * match_create_callback
75 * Creates a new `cu_match_t' object which will use the regular expression
76 * `regex' to match lines, see the `match_apply' method below. If the line
77 * matches, the callback passed in `callback' will be called along with the
78 * pointer `user_pointer'.
79 * The string that's passed to the callback depends on the regular expression:
80 * If the regular expression includes a sub-match, i. e. something like
81 * "value=([0-9][0-9]*)"
82 * then only the submatch (the part in the parenthesis) will be passed to the
83 * callback. If there is no submatch, then the entire string is passed to the
85 * The optional `excluderegex' allows to exclude the line from the match, if
86 * the excluderegex matches.
88 cu_match_t *match_create_callback (const char *regex, const char *excluderegex,
89 int (*callback) (const char *str,
90 char * const *matches, size_t matches_num, void *user_data),
98 * Creates a new `cu_match_t' with a default callback. The user data for that
99 * default callback will be a `cu_match_value_t' structure, with
100 * `ds_type' copied to the structure. The default callback will handle the
101 * string as containing a number (see strtoll(3) and strtod(3)) and store that
102 * number in the `value' member. How that is done depends on `ds_type':
104 * UTILS_MATCH_DS_TYPE_GAUGE
105 * The function will search for a floating point number in the string and
106 * store it in value.gauge.
107 * UTILS_MATCH_DS_TYPE_COUNTER_SET
108 * The function will search for an integer in the string and store it in
110 * UTILS_MATCH_DS_TYPE_COUNTER_ADD
111 * The function will search for an integer in the string and add it to the
112 * value in value.counter.
113 * UTILS_MATCH_DS_TYPE_COUNTER_INC
114 * The function will not search for anything in the string and increase
115 * value.counter by one.
117 cu_match_t *match_create_simple (const char *regex,
118 const char *excluderegex, int ds_type);
125 * Resets the internal state, if applicable. This function must be called
126 * after each iteration for "simple" matches, usually after dispatching the
129 void match_value_reset (cu_match_value_t *mv);
136 * Destroys the object and frees all internal resources.
138 void match_destroy (cu_match_t *obj);
145 * Tries to match the string `str' with the regular expression of `obj'. If
146 * the string matches, calls the callback in `obj' with the (sub-)match.
148 * The user_data pointer passed to `match_create_callback' is NOT freed
149 * automatically. The `cu_match_value_t' structure allocated by
150 * `match_create_callback' is freed automatically.
152 int match_apply (cu_match_t *obj, const char *str);
156 * match_get_user_data
159 * Returns the pointer passed to `match_create_callback' or a pointer to the
160 * `cu_match_value_t' structure allocated by `match_create_simple'.
162 void *match_get_user_data (cu_match_t *obj);
164 #endif /* UTILS_MATCH_H */
166 /* vim: set sw=2 sts=2 ts=8 : */