2 * collectd - src/utils_match.h
3 * Copyright (C) 2008-2014 Florian octo Forster
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24 * Florian octo Forster <octo at collectd.org>
28 #define UTILS_MATCH_H 1
31 #include "utils_latency.h"
34 * Each type may have 12 sub-types
35 * 0x1000 = 1000000000000
37 * ^^^^^^^^^^^^ <- Subtype bits
39 #define UTILS_MATCH_DS_TYPE_GAUGE 0x1000
40 #define UTILS_MATCH_DS_TYPE_COUNTER 0x2000
41 #define UTILS_MATCH_DS_TYPE_DERIVE 0x4000
42 #define UTILS_MATCH_DS_TYPE_ABSOLUTE 0x8000
44 #define UTILS_MATCH_CF_GAUGE_AVERAGE 0x01
45 #define UTILS_MATCH_CF_GAUGE_MIN 0x02
46 #define UTILS_MATCH_CF_GAUGE_MAX 0x04
47 #define UTILS_MATCH_CF_GAUGE_LAST 0x08
48 #define UTILS_MATCH_CF_GAUGE_INC 0x10
49 #define UTILS_MATCH_CF_GAUGE_ADD 0x20
50 #define UTILS_MATCH_CF_GAUGE_LATENCY 0x40
52 #define UTILS_MATCH_CF_COUNTER_SET 0x01
53 #define UTILS_MATCH_CF_COUNTER_ADD 0x02
54 #define UTILS_MATCH_CF_COUNTER_INC 0x04
56 #define UTILS_MATCH_CF_DERIVE_SET 0x01
57 #define UTILS_MATCH_CF_DERIVE_ADD 0x02
58 #define UTILS_MATCH_CF_DERIVE_INC 0x04
60 #define UTILS_MATCH_CF_ABSOLUTE_SET 0x01
61 #define UTILS_MATCH_CF_ABSOLUTE_ADD 0x02
62 #define UTILS_MATCH_CF_ABSOLUTE_INC 0x04
68 typedef struct cu_match_s cu_match_t;
70 struct cu_match_value_s
74 unsigned int values_num;
75 latency_counter_t *latency;
77 typedef struct cu_match_value_s cu_match_value_t;
84 * match_create_callback
87 * Creates a new `cu_match_t' object which will use the regular expression
88 * `regex' to match lines, see the `match_apply' method below. If the line
89 * matches, the callback passed in `callback' will be called along with the
90 * pointer `user_pointer'.
91 * The string that's passed to the callback depends on the regular expression:
92 * If the regular expression includes a sub-match, i. e. something like
93 * "value=([0-9][0-9]*)"
94 * then only the submatch (the part in the parenthesis) will be passed to the
95 * callback. If there is no submatch, then the entire string is passed to the
97 * The optional `excluderegex' allows to exclude the line from the match, if
98 * the excluderegex matches.
99 * When `match_destroy' is called the `user_data' pointer is freed using
100 * the `free_user_data' callback - if it is not NULL.
102 cu_match_t *match_create_callback (const char *regex, const char *excluderegex,
103 int (*callback) (const char *str,
104 char * const *matches, size_t matches_num, void *user_data),
105 void *user_data, void (*free_user_data) (void *user_data));
109 * match_create_simple
112 * Creates a new `cu_match_t' with a default callback. The user data for that
113 * default callback will be a `cu_match_value_t' structure, with
114 * `ds_type' copied to the structure. The default callback will handle the
115 * string as containing a number (see strtoll(3) and strtod(3)) and store that
116 * number in the `value' member. How that is done depends on `ds_type':
118 * UTILS_MATCH_DS_TYPE_GAUGE
119 * The function will search for a floating point number in the string and
120 * store it in value.gauge.
121 * UTILS_MATCH_DS_TYPE_COUNTER_SET
122 * The function will search for an integer in the string and store it in
124 * UTILS_MATCH_DS_TYPE_COUNTER_ADD
125 * The function will search for an integer in the string and add it to the
126 * value in value.counter.
127 * UTILS_MATCH_DS_TYPE_COUNTER_INC
128 * The function will not search for anything in the string and increase
129 * value.counter by one.
131 cu_match_t *match_create_simple (const char *regex,
132 const char *excluderegex, int ds_type);
139 * Resets the internal state, if applicable. This function must be called
140 * after each iteration for "simple" matches, usually after dispatching the
143 void match_value_reset (cu_match_value_t *mv);
150 * Destroys the object and frees all internal resources.
152 void match_destroy (cu_match_t *obj);
159 * Tries to match the string `str' with the regular expression of `obj'. If
160 * the string matches, calls the callback in `obj' with the (sub-)match.
162 * The user_data pointer passed to `match_create_callback' is NOT freed
163 * automatically. The `cu_match_value_t' structure allocated by
164 * `match_create_callback' is freed automatically.
166 int match_apply (cu_match_t *obj, const char *str);
170 * match_get_user_data
173 * Returns the pointer passed to `match_create_callback' or a pointer to the
174 * `cu_match_value_t' structure allocated by `match_create_simple'.
176 void *match_get_user_data (cu_match_t *obj);
178 #endif /* UTILS_MATCH_H */
180 /* vim: set sw=2 sts=2 ts=8 : */