2 * collectd - src/utils_match.h
3 * Copyright (C) 2008 Florian octo Forster
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24 * Florian octo Forster <octo at collectd.org>
28 #define UTILS_MATCH_H 1
33 * Each type may have 12 sub-types
34 * 0x1000 = 1000000000000
36 * ^^^^^^^^^^^^ <- Subtype bits
38 #define UTILS_MATCH_DS_TYPE_GAUGE 0x1000
39 #define UTILS_MATCH_DS_TYPE_COUNTER 0x2000
40 #define UTILS_MATCH_DS_TYPE_DERIVE 0x4000
41 #define UTILS_MATCH_DS_TYPE_ABSOLUTE 0x8000
43 #define UTILS_MATCH_CF_GAUGE_AVERAGE 0x01
44 #define UTILS_MATCH_CF_GAUGE_MIN 0x02
45 #define UTILS_MATCH_CF_GAUGE_MAX 0x04
46 #define UTILS_MATCH_CF_GAUGE_LAST 0x08
47 #define UTILS_MATCH_CF_GAUGE_INC 0x10
48 #define UTILS_MATCH_CF_GAUGE_ADD 0x20
50 #define UTILS_MATCH_CF_COUNTER_SET 0x01
51 #define UTILS_MATCH_CF_COUNTER_ADD 0x02
52 #define UTILS_MATCH_CF_COUNTER_INC 0x04
54 #define UTILS_MATCH_CF_DERIVE_SET 0x01
55 #define UTILS_MATCH_CF_DERIVE_ADD 0x02
56 #define UTILS_MATCH_CF_DERIVE_INC 0x04
58 #define UTILS_MATCH_CF_ABSOLUTE_SET 0x01
59 #define UTILS_MATCH_CF_ABSOLUTE_ADD 0x02
60 #define UTILS_MATCH_CF_ABSOLUTE_INC 0x04
66 typedef struct cu_match_s cu_match_t;
68 struct cu_match_value_s
72 unsigned int values_num;
74 typedef struct cu_match_value_s cu_match_value_t;
81 * match_create_callback
84 * Creates a new `cu_match_t' object which will use the regular expression
85 * `regex' to match lines, see the `match_apply' method below. If the line
86 * matches, the callback passed in `callback' will be called along with the
87 * pointer `user_pointer'.
88 * The string that's passed to the callback depends on the regular expression:
89 * If the regular expression includes a sub-match, i. e. something like
90 * "value=([0-9][0-9]*)"
91 * then only the submatch (the part in the parenthesis) will be passed to the
92 * callback. If there is no submatch, then the entire string is passed to the
94 * The optional `excluderegex' allows to exclude the line from the match, if
95 * the excluderegex matches.
97 cu_match_t *match_create_callback (const char *regex, const char *excluderegex,
98 int (*callback) (const char *str,
99 char * const *matches, size_t matches_num, void *user_data),
104 * match_create_simple
107 * Creates a new `cu_match_t' with a default callback. The user data for that
108 * default callback will be a `cu_match_value_t' structure, with
109 * `ds_type' copied to the structure. The default callback will handle the
110 * string as containing a number (see strtoll(3) and strtod(3)) and store that
111 * number in the `value' member. How that is done depends on `ds_type':
113 * UTILS_MATCH_DS_TYPE_GAUGE
114 * The function will search for a floating point number in the string and
115 * store it in value.gauge.
116 * UTILS_MATCH_DS_TYPE_COUNTER_SET
117 * The function will search for an integer in the string and store it in
119 * UTILS_MATCH_DS_TYPE_COUNTER_ADD
120 * The function will search for an integer in the string and add it to the
121 * value in value.counter.
122 * UTILS_MATCH_DS_TYPE_COUNTER_INC
123 * The function will not search for anything in the string and increase
124 * value.counter by one.
126 cu_match_t *match_create_simple (const char *regex,
127 const char *excluderegex, int ds_type);
134 * Destroys the object and frees all internal resources.
136 void match_destroy (cu_match_t *obj);
143 * Tries to match the string `str' with the regular expression of `obj'. If
144 * the string matches, calls the callback in `obj' with the (sub-)match.
146 * The user_data pointer passed to `match_create_callback' is NOT freed
147 * automatically. The `cu_match_value_t' structure allocated by
148 * `match_create_callback' is freed automatically.
150 int match_apply (cu_match_t *obj, const char *str);
154 * match_get_user_data
157 * Returns the pointer passed to `match_create_callback' or a pointer to the
158 * `cu_match_value_t' structure allocated by `match_create_simple'.
160 void *match_get_user_data (cu_match_t *obj);
162 #endif /* UTILS_MATCH_H */
164 /* vim: set sw=2 sts=2 ts=8 : */