prosody
f56670ce64de
util/helpers.lua

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util/helpers.lua @ 1959:f56670ce64de

util.helpers: Add get_upvalue(function, name) helper
author Matthew Wild <mwild1@gmail.com>
date Fri, 16 Oct 2009 22:03:32 +0100
parent 1795:0e933d6f2c31
child 1964:101a8df23b29
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1
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2 module("helpers", package.seeall);
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3
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4 -- Helper functions for debugging
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6 local log = require "util.logger".init("util.debug");
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7
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8 function log_events(events, name, logger)
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9 local f = events.fire_event;
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10 if not f then
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11 error("Object does not appear to be a util.events object");
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12 end
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13 logger = logger or log;
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14 name = name or tostring(events);
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15 function events.fire_event(event, ...)
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16 logger("debug", "%s firing event: %s", name, event);
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17 return f(event, ...);
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18 end
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19 events[events.fire_event] = f;
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20 return events;
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21 end
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23 function revert_log_events(events)
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24 events.fire_event, events[events.fire_event] = events[events.fire_event], nil; -- :)
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25 end
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26
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27 function get_upvalue(f, get_name)
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28 local i, name, value = 0;
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29 repeat
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30 i = i + 1;
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31 name, value = debug.getupvalue(f, i);
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32 until name == get_name or name == nil;
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33 return value;
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34 end
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35
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36 return _M;