add ansicolors module

Author: Markus Klotzbuecher

ansicolors.lua

@@ -0,0 +1,82 @@
+-- Copyright (c) 2009 Rob Hoelz <[email protected]>
+--
+-- Permission is hereby granted, free of charge, to any person obtaining a copy
+-- of this software and associated documentation files (the "Software"), to deal
+-- in the Software without restriction, including without limitation the rights
+-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+-- copies of the Software, and to permit persons to whom the Software is
+-- furnished to do so, subject to the following conditions:
+--
+-- The above copyright notice and this permission notice shall be included in
+-- all copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+-- THE SOFTWARE.
+
+local pairs = pairs
+local tostring = tostring
+local setmetatable = setmetatable
+local schar = string.char
+
+module 'ansicolors'
+
+local colormt = {}
+
+function colormt:__tostring()
+    return self.value
+end
+
+function colormt:__concat(other)
+    return tostring(self) .. tostring(other)
+end
+
+function colormt:__call(s)
+    return self .. s .. _M.reset
+end
+
+colormt.__metatable = {}
+
+local function makecolor(value)
+    return setmetatable({ value = schar(27) .. '[' .. tostring(value) .. 'm' }, colormt)
+end
+
+local colors = {
+    -- attributes
+    reset = 0,
+    clear = 0,
+    bright = 1,
+    dim = 2,
+    underscore = 4,
+    blink = 5,
+    reverse = 7,
+    hidden = 8,
+
+    -- foreground
+    black = 30,
+    red = 31,
+    green = 32,
+    yellow = 33,
+    blue = 34,
+    magenta = 35,
+    cyan = 36,
+    white = 37,
+
+    -- background
+    onblack = 40,
+    onred = 41,
+    ongreen = 42,
+    onyellow = 43,
+    onblue = 44,
+    onmagenta = 45,
+    oncyan = 46,
+    onwhite = 47,
+}
+
+for c, v in pairs(colors) do
+    _M[c] = makecolor(v)
+end