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* collectd - src/utils_match.h
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* Copyright (C) 2008 Florian octo Forster
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* Florian octo Forster <octo at verplant.org>
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#define UTILS_MATCH_H 1
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#define UTILS_MATCH_DS_TYPE_GAUGE 0x10
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#define UTILS_MATCH_DS_TYPE_COUNTER 0x20
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#define UTILS_MATCH_CF_GAUGE_AVERAGE 0x01
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#define UTILS_MATCH_CF_GAUGE_MIN 0x02
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#define UTILS_MATCH_CF_GAUGE_MAX 0x04
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#define UTILS_MATCH_CF_GAUGE_LAST 0x08
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#define UTILS_MATCH_CF_COUNTER_SET 0x01
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#define UTILS_MATCH_CF_COUNTER_ADD 0x02
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#define UTILS_MATCH_CF_COUNTER_INC 0x04
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typedef struct cu_match_s cu_match_t;
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struct cu_match_value_s
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unsigned int values_num;
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typedef struct cu_match_value_s cu_match_value_t;
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* match_create_callback
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* Creates a new `cu_match_t' object which will use the regular expression
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* `regex' to match lines, see the `match_apply' method below. If the line
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* matches, the callback passed in `callback' will be called along with the
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* pointer `user_pointer'.
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* The string that's passed to the callback depends on the regular expression:
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* If the regular expression includes a sub-match, i. e. something like
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* "value=([0-9][0-9]*)"
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* then only the submatch (the part in the parenthesis) will be passed to the
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* callback. If there is no submatch, then the entire string is passed to the
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cu_match_t *match_create_callback (const char *regex,
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int (*callback) (const char *str,
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char * const *matches, size_t matches_num, void *user_data),
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* Creates a new `cu_match_t' with a default callback. The user data for that
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* default callback will be a `cu_match_value_t' structure, with
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* `ds_type' copied to the structure. The default callback will handle the
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* string as containing a number (see strtoll(3) and strtod(3)) and store that
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* number in the `value' member. How that is done depends on `ds_type':
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* UTILS_MATCH_DS_TYPE_GAUGE
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* The function will search for a floating point number in the string and
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* store it in value.gauge.
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* UTILS_MATCH_DS_TYPE_COUNTER_SET
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* The function will search for an integer in the string and store it in
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* UTILS_MATCH_DS_TYPE_COUNTER_ADD
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* The function will search for an integer in the string and add it to the
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* value in value.counter.
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* UTILS_MATCH_DS_TYPE_COUNTER_INC
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* The function will not search for anything in the string and increase
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* value.counter by one.
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cu_match_t *match_create_simple (const char *regex, int ds_type);
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* Destroys the object and frees all internal resources.
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void match_destroy (cu_match_t *obj);
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* Tries to match the string `str' with the regular expression of `obj'. If
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* the string matches, calls the callback in `obj' with the (sub-)match.
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* The user_data pointer passed to `match_create_callback' is NOT freed
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* automatically. The `cu_match_value_t' structure allocated by
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* `match_create_callback' is freed automatically.
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int match_apply (cu_match_t *obj, const char *str);
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* match_get_user_data
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* Returns the pointer passed to `match_create_callback' or a pointer to the
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* `cu_match_value_t' structure allocated by `match_create_callback'.
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void *match_get_user_data (cu_match_t *obj);
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#endif /* UTILS_MATCH_H */
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/* vim: set sw=2 sts=2 ts=8 : */