2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
11 local config = require "core.configmanager";
12 local log_sources = config.get("*", "core", "log_sources");
14 local find = string.find;
15 local ipairs, pairs, setmetatable = ipairs, pairs, setmetatable;
19 local name_sinks, level_sinks = {}, {};
20 local name_patterns = {};
22 -- Weak-keyed so that loggers are collected
23 local modify_hooks = setmetatable({}, { __mode = "k" });
26 local outfunction = nil;
30 local log_this = false;
31 for _, source in ipairs(log_sources) do
32 if find(name, source) then
38 if not log_this then return function () end end
41 local log_debug = make_logger(name, "debug");
42 local log_info = make_logger(name, "info");
43 local log_warn = make_logger(name, "warn");
44 local log_error = make_logger(name, "error");
46 --name = nil; -- While this line is not commented, will automatically fill in file/line number info
47 local namelen = #name;
48 return function (level, message, ...)
49 if outfunction then return outfunction(name, level, message, ...); end
51 if level == "debug" then
52 return log_debug(message, ...);
53 elseif level == "info" then
54 return log_info(message, ...);
55 elseif level == "warn" then
56 return log_warn(message, ...);
57 elseif level == "error" then
58 return log_error(message, ...);
63 function make_logger(source_name, level)
64 local level_handlers = level_sinks[level];
65 if not level_handlers then
67 level_sinks[level] = level_handlers;
70 local source_handlers = name_sinks[source_name];
72 -- All your premature optimisation is belong to me!
73 local num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers;
75 local logger = function (message, ...)
76 if source_handlers then
77 for i = 1,num_source_handlers do
78 if source_handlers[i](source_name, level, message, ...) == false then
84 for i = 1,num_level_handlers do
85 level_handlers[i](source_name, level, message, ...);
89 -- To make sure our cached lengths stay in sync with reality
90 modify_hooks[logger] = function () num_level_handlers, num_source_handlers = #level_handlers, source_handlers and #source_handlers; end;
96 local old_func = outfunction;
97 if not f then outfunction = nil; return true, old_func; end
98 local ok, ret = pcall(f, "logger", "info", "Switched logging output successfully");
106 function add_level_sink(level, sink_function)
107 if not level_sinks[level] then
108 level_sinks[level] = { sink_function };
110 level_sinks[level][#level_sinks[level] + 1 ] = sink_function;
113 for _, modify_hook in pairs(modify_hooks) do
118 function add_name_sink(name, sink_function, exclusive)
119 if not name_sinks[name] then
120 name_sinks[name] = { sink_function };
122 name_sinks[name][#name_sinks[name] + 1] = sink_function;
125 for _, modify_hook in pairs(modify_hooks) do
130 function add_name_pattern_sink(name_pattern, sink_function, exclusive)
131 if not name_patterns[name_pattern] then
132 name_patterns[name_pattern] = { sink_function };
134 name_patterns[name_pattern][#name_patterns[name_pattern] + 1] = sink_function;
138 _M.new = make_logger;