2 * collectd - src/utils_match.h
3 * Copyright (C) 2008 Florian octo Forster
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
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10 * Software is furnished to do so, subject to the following conditions:
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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21 * DEALINGS IN THE SOFTWARE.
24 * Florian octo Forster <octo at collectd.org>
28 #define UTILS_MATCH_H 1
35 #define UTILS_MATCH_DS_TYPE_GAUGE 0x10
36 #define UTILS_MATCH_DS_TYPE_COUNTER 0x20
37 #define UTILS_MATCH_DS_TYPE_DERIVE 0x40
38 #define UTILS_MATCH_DS_TYPE_ABSOLUTE 0x80
40 #define UTILS_MATCH_CF_GAUGE_AVERAGE 0x01
41 #define UTILS_MATCH_CF_GAUGE_MIN 0x02
42 #define UTILS_MATCH_CF_GAUGE_MAX 0x04
43 #define UTILS_MATCH_CF_GAUGE_LAST 0x08
45 #define UTILS_MATCH_CF_COUNTER_SET 0x01
46 #define UTILS_MATCH_CF_COUNTER_ADD 0x02
47 #define UTILS_MATCH_CF_COUNTER_INC 0x04
49 #define UTILS_MATCH_CF_DERIVE_SET 0x01
50 #define UTILS_MATCH_CF_DERIVE_ADD 0x02
51 #define UTILS_MATCH_CF_DERIVE_INC 0x04
53 #define UTILS_MATCH_CF_ABSOLUTE_SET 0x01
54 #define UTILS_MATCH_CF_ABSOLUTE_ADD 0x02
55 #define UTILS_MATCH_CF_ABSOLUTE_INC 0x04
61 typedef struct cu_match_s cu_match_t;
63 struct cu_match_value_s
67 unsigned int values_num;
69 typedef struct cu_match_value_s cu_match_value_t;
76 * match_create_callback
79 * Creates a new `cu_match_t' object which will use the regular expression
80 * `regex' to match lines, see the `match_apply' method below. If the line
81 * matches, the callback passed in `callback' will be called along with the
82 * pointer `user_pointer'.
83 * The string that's passed to the callback depends on the regular expression:
84 * If the regular expression includes a sub-match, i. e. something like
85 * "value=([0-9][0-9]*)"
86 * then only the submatch (the part in the parenthesis) will be passed to the
87 * callback. If there is no submatch, then the entire string is passed to the
89 * The optional `excluderegex' allows to exclude the line from the match, if
90 * the excluderegex matches.
92 cu_match_t *match_create_callback (const char *regex, const char *excluderegex,
93 int (*callback) (const char *str,
94 char * const *matches, size_t matches_num, void *user_data),
102 * Creates a new `cu_match_t' with a default callback. The user data for that
103 * default callback will be a `cu_match_value_t' structure, with
104 * `ds_type' copied to the structure. The default callback will handle the
105 * string as containing a number (see strtoll(3) and strtod(3)) and store that
106 * number in the `value' member. How that is done depends on `ds_type':
108 * UTILS_MATCH_DS_TYPE_GAUGE
109 * The function will search for a floating point number in the string and
110 * store it in value.gauge.
111 * UTILS_MATCH_DS_TYPE_COUNTER_SET
112 * The function will search for an integer in the string and store it in
114 * UTILS_MATCH_DS_TYPE_COUNTER_ADD
115 * The function will search for an integer in the string and add it to the
116 * value in value.counter.
117 * UTILS_MATCH_DS_TYPE_COUNTER_INC
118 * The function will not search for anything in the string and increase
119 * value.counter by one.
121 cu_match_t *match_create_simple (const char *regex,
122 const char *excluderegex, int ds_type);
129 * Destroys the object and frees all internal resources.
131 void match_destroy (cu_match_t *obj);
138 * Tries to match the string `str' with the regular expression of `obj'. If
139 * the string matches, calls the callback in `obj' with the (sub-)match.
141 * The user_data pointer passed to `match_create_callback' is NOT freed
142 * automatically. The `cu_match_value_t' structure allocated by
143 * `match_create_callback' is freed automatically.
145 int match_apply (cu_match_t *obj, const char *str);
149 * match_get_user_data
152 * Returns the pointer passed to `match_create_callback' or a pointer to the
153 * `cu_match_value_t' structure allocated by `match_create_simple'.
155 void *match_get_user_data (cu_match_t *obj);
157 #endif /* UTILS_MATCH_H */
159 /* vim: set sw=2 sts=2 ts=8 : */