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+--
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+-- lume
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+--
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+-- Copyright (c) 2020 rxi
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+--
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+-- Permission is hereby granted, free of charge, to any person obtaining a copy of
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+-- this software and associated documentation files (the "Software"), to deal in
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+-- the Software without restriction, including without limitation the rights to
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+-- use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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+-- of the Software, and to permit persons to whom the Software is furnished to do
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+-- so, subject to the following conditions:
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+--
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+-- The above copyright notice and this permission notice shall be included in all
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+-- copies or substantial portions of the Software.
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+--
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+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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+-- SOFTWARE.
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+--
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+
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+local lume = { _version = "2.3.0" }
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+
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+local pairs, ipairs = pairs, ipairs
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+local type, assert, unpack = type, assert, unpack or table.unpack
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+local tostring, tonumber = tostring, tonumber
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+local math_floor = math.floor
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+local math_ceil = math.ceil
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+local math_atan2 = math.atan2 or math.atan
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+local math_sqrt = math.sqrt
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+local math_abs = math.abs
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+
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+local noop = function()
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+end
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+
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+local identity = function(x)
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+ return x
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+end
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+
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+local patternescape = function(str)
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+ return str:gsub("[%(%)%.%%%+%-%*%?%[%]%^%$]", "%%%1")
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+end
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+
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+local absindex = function(len, i)
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+ return i < 0 and (len + i + 1) or i
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+end
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+
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+local iscallable = function(x)
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+ if type(x) == "function" then return true end
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+ local mt = getmetatable(x)
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+ return mt and mt.__call ~= nil
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+end
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+
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+local getiter = function(x)
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+ if lume.isarray(x) then
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+ return ipairs
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+ elseif type(x) == "table" then
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+ return pairs
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+ end
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+ error("expected table", 3)
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+end
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+
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+local iteratee = function(x)
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+ if x == nil then return identity end
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+ if iscallable(x) then return x end
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+ if type(x) == "table" then
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+ return function(z)
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+ for k, v in pairs(x) do
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+ if z[k] ~= v then return false end
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+ end
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+ return true
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+ end
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+ end
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+ return function(z) return z[x] end
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+end
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+
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+
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+
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+function lume.clamp(x, min, max)
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+ return x < min and min or (x > max and max or x)
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+end
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+
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+
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+function lume.round(x, increment)
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+ if increment then return lume.round(x / increment) * increment end
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+ return x >= 0 and math_floor(x + .5) or math_ceil(x - .5)
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+end
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+
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+
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+function lume.sign(x)
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+ return x < 0 and -1 or 1
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+end
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+
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+
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+function lume.lerp(a, b, amount)
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+ return a + (b - a) * lume.clamp(amount, 0, 1)
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+end
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+
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+
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+function lume.smooth(a, b, amount)
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+ local t = lume.clamp(amount, 0, 1)
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+ local m = t * t * (3 - 2 * t)
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+ return a + (b - a) * m
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+end
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+
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+
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+function lume.pingpong(x)
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+ return 1 - math_abs(1 - x % 2)
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+end
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+
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+
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+function lume.distance(x1, y1, x2, y2, squared)
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+ local dx = x1 - x2
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+ local dy = y1 - y2
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+ local s = dx * dx + dy * dy
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+ return squared and s or math_sqrt(s)
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+end
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+
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+
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+function lume.angle(x1, y1, x2, y2)
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+ return math_atan2(y2 - y1, x2 - x1)
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+end
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+
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+
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+function lume.vector(angle, magnitude)
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+ return math.cos(angle) * magnitude, math.sin(angle) * magnitude
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+end
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+
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+
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+function lume.random(a, b)
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+ if not a then a, b = 0, 1 end
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+ if not b then b = 0 end
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+ return a + math.random() * (b - a)
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+end
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+
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+
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+function lume.randomchoice(t)
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+ return t[math.random(#t)]
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+end
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+
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+
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+function lume.weightedchoice(t)
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+ local sum = 0
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+ for _, v in pairs(t) do
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+ assert(v >= 0, "weight value less than zero")
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+ sum = sum + v
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+ end
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+ assert(sum ~= 0, "all weights are zero")
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+ local rnd = lume.random(sum)
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+ for k, v in pairs(t) do
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+ if rnd < v then return k end
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+ rnd = rnd - v
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+ end
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+end
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+
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+
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+function lume.isarray(x)
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+ return type(x) == "table" and x[1] ~= nil
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+end
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+
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+
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+function lume.push(t, ...)
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+ local n = select("#", ...)
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+ for i = 1, n do
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+ t[#t + 1] = select(i, ...)
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+ end
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+ return ...
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+end
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+
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+
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+function lume.remove(t, x)
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+ local iter = getiter(t)
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+ for i, v in iter(t) do
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+ if v == x then
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+ if lume.isarray(t) then
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+ table.remove(t, i)
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+ break
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+ else
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+ t[i] = nil
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+ break
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+ end
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+ end
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+ end
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+ return x
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+end
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+
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+
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+function lume.clear(t)
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+ local iter = getiter(t)
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+ for k in iter(t) do
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+ t[k] = nil
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+ end
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+ return t
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+end
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+
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+
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+function lume.extend(t, ...)
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+ for i = 1, select("#", ...) do
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+ local x = select(i, ...)
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+ if x then
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+ for k, v in pairs(x) do
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+ t[k] = v
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+ end
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+ end
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+ end
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+ return t
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+end
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+
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+
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+function lume.shuffle(t)
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+ local rtn = {}
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+ for i = 1, #t do
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+ local r = math.random(i)
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+ if r ~= i then
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+ rtn[i] = rtn[r]
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+ end
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+ rtn[r] = t[i]
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.sort(t, comp)
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+ local rtn = lume.clone(t)
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+ if comp then
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+ if type(comp) == "string" then
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+ table.sort(rtn, function(a, b) return a[comp] < b[comp] end)
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+ else
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+ table.sort(rtn, comp)
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+ end
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+ else
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+ table.sort(rtn)
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.array(...)
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+ local t = {}
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+ for x in ... do t[#t + 1] = x end
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+ return t
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+end
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+
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+
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+function lume.each(t, fn, ...)
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+ local iter = getiter(t)
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+ if type(fn) == "string" then
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+ for _, v in iter(t) do v[fn](v, ...) end
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+ else
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+ for _, v in iter(t) do fn(v, ...) end
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+ end
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+ return t
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+end
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+
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+
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+function lume.map(t, fn)
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+ fn = iteratee(fn)
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+ local iter = getiter(t)
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+ local rtn = {}
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+ for k, v in iter(t) do rtn[k] = fn(v) end
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+ return rtn
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+end
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+
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+
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+function lume.all(t, fn)
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+ fn = iteratee(fn)
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+ local iter = getiter(t)
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+ for _, v in iter(t) do
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+ if not fn(v) then return false end
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+ end
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+ return true
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+end
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+
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+
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+function lume.any(t, fn)
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+ fn = iteratee(fn)
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+ local iter = getiter(t)
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+ for _, v in iter(t) do
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+ if fn(v) then return true end
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+ end
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+ return false
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+end
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+
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+
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+function lume.reduce(t, fn, first)
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+ local started = first ~= nil
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+ local acc = first
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+ local iter = getiter(t)
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+ for _, v in iter(t) do
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+ if started then
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+ acc = fn(acc, v)
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+ else
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+ acc = v
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+ started = true
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+ end
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+ end
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+ assert(started, "reduce of an empty table with no first value")
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+ return acc
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+end
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+
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+
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+function lume.unique(t)
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+ local rtn = {}
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+ for k in pairs(lume.invert(t)) do
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+ rtn[#rtn + 1] = k
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.filter(t, fn, retainkeys)
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+ fn = iteratee(fn)
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+ local iter = getiter(t)
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+ local rtn = {}
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+ if retainkeys then
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+ for k, v in iter(t) do
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+ if fn(v) then rtn[k] = v end
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+ end
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+ else
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+ for _, v in iter(t) do
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+ if fn(v) then rtn[#rtn + 1] = v end
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+ end
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.reject(t, fn, retainkeys)
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+ fn = iteratee(fn)
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+ local iter = getiter(t)
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+ local rtn = {}
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+ if retainkeys then
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+ for k, v in iter(t) do
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+ if not fn(v) then rtn[k] = v end
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+ end
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+ else
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+ for _, v in iter(t) do
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+ if not fn(v) then rtn[#rtn + 1] = v end
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+ end
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.merge(...)
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+ local rtn = {}
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+ for i = 1, select("#", ...) do
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+ local t = select(i, ...)
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+ local iter = getiter(t)
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+ for k, v in iter(t) do
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+ rtn[k] = v
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+ end
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.concat(...)
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+ local rtn = {}
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+ for i = 1, select("#", ...) do
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+ local t = select(i, ...)
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+ if t ~= nil then
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+ local iter = getiter(t)
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+ for _, v in iter(t) do
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+ rtn[#rtn + 1] = v
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+ end
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+ end
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.find(t, value)
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+ local iter = getiter(t)
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+ for k, v in iter(t) do
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+ if v == value then return k end
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+ end
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+ return nil
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+end
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+
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+
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+function lume.match(t, fn)
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+ fn = iteratee(fn)
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+ local iter = getiter(t)
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+ for k, v in iter(t) do
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+ if fn(v) then return v, k end
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+ end
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+ return nil
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+end
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+
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+
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+function lume.count(t, fn)
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+ local count = 0
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+ local iter = getiter(t)
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+ if fn then
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+ fn = iteratee(fn)
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+ for _, v in iter(t) do
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+ if fn(v) then count = count + 1 end
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+ end
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+ else
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+ if lume.isarray(t) then
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+ return #t
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+ end
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+ for _ in iter(t) do count = count + 1 end
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+ end
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+ return count
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+end
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+
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+
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+function lume.slice(t, i, j)
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+ i = i and absindex(#t, i) or 1
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+ j = j and absindex(#t, j) or #t
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+ local rtn = {}
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+ for x = i < 1 and 1 or i, j > #t and #t or j do
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+ rtn[#rtn + 1] = t[x]
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.first(t, n)
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+ if not n then return t[1] end
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+ return lume.slice(t, 1, n)
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+end
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+
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+
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+function lume.last(t, n)
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+ if not n then return t[#t] end
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+ return lume.slice(t, -n, -1)
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+end
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+
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+
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+function lume.invert(t)
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+ local rtn = {}
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+ for k, v in pairs(t) do rtn[v] = k end
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+ return rtn
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+end
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+
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+
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+function lume.pick(t, ...)
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+ local rtn = {}
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+ for i = 1, select("#", ...) do
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+ local k = select(i, ...)
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+ rtn[k] = t[k]
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+ end
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+ return rtn
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+end
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+
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+
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+function lume.keys(t)
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+ local rtn = {}
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+ local iter = getiter(t)
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+ for k in iter(t) do rtn[#rtn + 1] = k end
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+ return rtn
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+end
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+
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+
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+function lume.clone(t)
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+ local rtn = {}
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+ for k, v in pairs(t) do rtn[k] = v end
|
|
|
+ return rtn
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.fn(fn, ...)
|
|
|
+ assert(iscallable(fn), "expected a function as the first argument")
|
|
|
+ local args = { ... }
|
|
|
+ return function(...)
|
|
|
+ local a = lume.concat(args, { ... })
|
|
|
+ return fn(unpack(a))
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.once(fn, ...)
|
|
|
+ local f = lume.fn(fn, ...)
|
|
|
+ local done = false
|
|
|
+ return function(...)
|
|
|
+ if done then return end
|
|
|
+ done = true
|
|
|
+ return f(...)
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+local memoize_fnkey = {}
|
|
|
+local memoize_nil = {}
|
|
|
+
|
|
|
+function lume.memoize(fn)
|
|
|
+ local cache = {}
|
|
|
+ return function(...)
|
|
|
+ local c = cache
|
|
|
+ for i = 1, select("#", ...) do
|
|
|
+ local a = select(i, ...) or memoize_nil
|
|
|
+ c[a] = c[a] or {}
|
|
|
+ c = c[a]
|
|
|
+ end
|
|
|
+ c[memoize_fnkey] = c[memoize_fnkey] or {fn(...)}
|
|
|
+ return unpack(c[memoize_fnkey])
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.combine(...)
|
|
|
+ local n = select('#', ...)
|
|
|
+ if n == 0 then return noop end
|
|
|
+ if n == 1 then
|
|
|
+ local fn = select(1, ...)
|
|
|
+ if not fn then return noop end
|
|
|
+ assert(iscallable(fn), "expected a function or nil")
|
|
|
+ return fn
|
|
|
+ end
|
|
|
+ local funcs = {}
|
|
|
+ for i = 1, n do
|
|
|
+ local fn = select(i, ...)
|
|
|
+ if fn ~= nil then
|
|
|
+ assert(iscallable(fn), "expected a function or nil")
|
|
|
+ funcs[#funcs + 1] = fn
|
|
|
+ end
|
|
|
+ end
|
|
|
+ return function(...)
|
|
|
+ for _, f in ipairs(funcs) do f(...) end
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.call(fn, ...)
|
|
|
+ if fn then
|
|
|
+ return fn(...)
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.time(fn, ...)
|
|
|
+ local start = os.clock()
|
|
|
+ local rtn = {fn(...)}
|
|
|
+ return (os.clock() - start), unpack(rtn)
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+local lambda_cache = {}
|
|
|
+
|
|
|
+function lume.lambda(str)
|
|
|
+ if not lambda_cache[str] then
|
|
|
+ local args, body = str:match([[^([%w,_ ]-)%->(.-)$]])
|
|
|
+ assert(args and body, "bad string lambda")
|
|
|
+ local s = "return function(" .. args .. ")\nreturn " .. body .. "\nend"
|
|
|
+ lambda_cache[str] = lume.dostring(s)
|
|
|
+ end
|
|
|
+ return lambda_cache[str]
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+local serialize
|
|
|
+
|
|
|
+local serialize_map = {
|
|
|
+ [ "boolean" ] = tostring,
|
|
|
+ [ "nil" ] = tostring,
|
|
|
+ [ "string" ] = function(v) return string.format("%q", v) end,
|
|
|
+ [ "number" ] = function(v)
|
|
|
+ if v ~= v then return "0/0" -- nan
|
|
|
+ elseif v == 1 / 0 then return "1/0" -- inf
|
|
|
+ elseif v == -1 / 0 then return "-1/0" end -- -inf
|
|
|
+ return tostring(v)
|
|
|
+ end,
|
|
|
+ [ "table" ] = function(t, stk)
|
|
|
+ stk = stk or {}
|
|
|
+ if stk[t] then error("circular reference") end
|
|
|
+ local rtn = {}
|
|
|
+ stk[t] = true
|
|
|
+ for k, v in pairs(t) do
|
|
|
+ rtn[#rtn + 1] = "[" .. serialize(k, stk) .. "]=" .. serialize(v, stk)
|
|
|
+ end
|
|
|
+ stk[t] = nil
|
|
|
+ return "{" .. table.concat(rtn, ",") .. "}"
|
|
|
+ end
|
|
|
+}
|
|
|
+
|
|
|
+setmetatable(serialize_map, {
|
|
|
+ __index = function(_, k) error("unsupported serialize type: " .. k) end
|
|
|
+})
|
|
|
+
|
|
|
+serialize = function(x, stk)
|
|
|
+ return serialize_map[type(x)](x, stk)
|
|
|
+end
|
|
|
+
|
|
|
+function lume.serialize(x)
|
|
|
+ return serialize(x)
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.deserialize(str)
|
|
|
+ return lume.dostring("return " .. str)
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.split(str, sep)
|
|
|
+ if not sep then
|
|
|
+ return lume.array(str:gmatch("([%S]+)"))
|
|
|
+ else
|
|
|
+ assert(sep ~= "", "empty separator")
|
|
|
+ local psep = patternescape(sep)
|
|
|
+ return lume.array((str..sep):gmatch("(.-)("..psep..")"))
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.trim(str, chars)
|
|
|
+ if not chars then return str:match("^[%s]*(.-)[%s]*$") end
|
|
|
+ chars = patternescape(chars)
|
|
|
+ return str:match("^[" .. chars .. "]*(.-)[" .. chars .. "]*$")
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.wordwrap(str, limit)
|
|
|
+ limit = limit or 72
|
|
|
+ local check
|
|
|
+ if type(limit) == "number" then
|
|
|
+ check = function(s) return #s >= limit end
|
|
|
+ else
|
|
|
+ check = limit
|
|
|
+ end
|
|
|
+ local rtn = {}
|
|
|
+ local line = ""
|
|
|
+ for word, spaces in str:gmatch("(%S+)(%s*)") do
|
|
|
+ local s = line .. word
|
|
|
+ if check(s) then
|
|
|
+ table.insert(rtn, line .. "\n")
|
|
|
+ line = word
|
|
|
+ else
|
|
|
+ line = s
|
|
|
+ end
|
|
|
+ for c in spaces:gmatch(".") do
|
|
|
+ if c == "\n" then
|
|
|
+ table.insert(rtn, line .. "\n")
|
|
|
+ line = ""
|
|
|
+ else
|
|
|
+ line = line .. c
|
|
|
+ end
|
|
|
+ end
|
|
|
+ end
|
|
|
+ table.insert(rtn, line)
|
|
|
+ return table.concat(rtn)
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.format(str, vars)
|
|
|
+ if not vars then return str end
|
|
|
+ local f = function(x)
|
|
|
+ return tostring(vars[x] or vars[tonumber(x)] or "{" .. x .. "}")
|
|
|
+ end
|
|
|
+ return (str:gsub("{(.-)}", f))
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.trace(...)
|
|
|
+ local info = debug.getinfo(2, "Sl")
|
|
|
+ local t = { info.short_src .. ":" .. info.currentline .. ":" }
|
|
|
+ for i = 1, select("#", ...) do
|
|
|
+ local x = select(i, ...)
|
|
|
+ if type(x) == "number" then
|
|
|
+ x = string.format("%g", lume.round(x, .01))
|
|
|
+ end
|
|
|
+ t[#t + 1] = tostring(x)
|
|
|
+ end
|
|
|
+ print(table.concat(t, " "))
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.dostring(str)
|
|
|
+ return assert((loadstring or load)(str))()
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.uuid()
|
|
|
+ local fn = function(x)
|
|
|
+ local r = math.random(16) - 1
|
|
|
+ r = (x == "x") and (r + 1) or (r % 4) + 9
|
|
|
+ return ("0123456789abcdef"):sub(r, r)
|
|
|
+ end
|
|
|
+ return (("xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx"):gsub("[xy]", fn))
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.hotswap(modname)
|
|
|
+ local oldglobal = lume.clone(_G)
|
|
|
+ local updated = {}
|
|
|
+ local function update(old, new)
|
|
|
+ if updated[old] then return end
|
|
|
+ updated[old] = true
|
|
|
+ local oldmt, newmt = getmetatable(old), getmetatable(new)
|
|
|
+ if oldmt and newmt then update(oldmt, newmt) end
|
|
|
+ for k, v in pairs(new) do
|
|
|
+ if type(v) == "table" then update(old[k], v) else old[k] = v end
|
|
|
+ end
|
|
|
+ end
|
|
|
+ local err = nil
|
|
|
+ local function onerror(e)
|
|
|
+ for k in pairs(_G) do _G[k] = oldglobal[k] end
|
|
|
+ err = lume.trim(e)
|
|
|
+ end
|
|
|
+ local ok, oldmod = pcall(require, modname)
|
|
|
+ oldmod = ok and oldmod or nil
|
|
|
+ xpcall(function()
|
|
|
+ package.loaded[modname] = nil
|
|
|
+ local newmod = require(modname)
|
|
|
+ if type(oldmod) == "table" then update(oldmod, newmod) end
|
|
|
+ for k, v in pairs(oldglobal) do
|
|
|
+ if v ~= _G[k] and type(v) == "table" then
|
|
|
+ update(v, _G[k])
|
|
|
+ _G[k] = v
|
|
|
+ end
|
|
|
+ end
|
|
|
+ end, onerror)
|
|
|
+ package.loaded[modname] = oldmod
|
|
|
+ if err then return nil, err end
|
|
|
+ return oldmod
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+local ripairs_iter = function(t, i)
|
|
|
+ i = i - 1
|
|
|
+ local v = t[i]
|
|
|
+ if v ~= nil then
|
|
|
+ return i, v
|
|
|
+ end
|
|
|
+end
|
|
|
+
|
|
|
+function lume.ripairs(t)
|
|
|
+ return ripairs_iter, t, (#t + 1)
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+function lume.color(str, mul)
|
|
|
+ mul = mul or 1
|
|
|
+ local r, g, b, a
|
|
|
+ r, g, b = str:match("#(%x%x)(%x%x)(%x%x)")
|
|
|
+ if r then
|
|
|
+ r = tonumber(r, 16) / 0xff
|
|
|
+ g = tonumber(g, 16) / 0xff
|
|
|
+ b = tonumber(b, 16) / 0xff
|
|
|
+ a = 1
|
|
|
+ elseif str:match("rgba?%s*%([%d%s%.,]+%)") then
|
|
|
+ local f = str:gmatch("[%d.]+")
|
|
|
+ r = (f() or 0) / 0xff
|
|
|
+ g = (f() or 0) / 0xff
|
|
|
+ b = (f() or 0) / 0xff
|
|
|
+ a = f() or 1
|
|
|
+ else
|
|
|
+ error(("bad color string '%s'"):format(str))
|
|
|
+ end
|
|
|
+ return r * mul, g * mul, b * mul, a * mul
|
|
|
+end
|
|
|
+
|
|
|
+
|
|
|
+local chain_mt = {}
|
|
|
+chain_mt.__index = lume.map(lume.filter(lume, iscallable, true),
|
|
|
+ function(fn)
|
|
|
+ return function(self, ...)
|
|
|
+ self._value = fn(self._value, ...)
|
|
|
+ return self
|
|
|
+ end
|
|
|
+ end)
|
|
|
+chain_mt.__index.result = function(x) return x._value end
|
|
|
+
|
|
|
+function lume.chain(value)
|
|
|
+ return setmetatable({ _value = value }, chain_mt)
|
|
|
+end
|
|
|
+
|
|
|
+setmetatable(lume, {
|
|
|
+ __call = function(_, ...)
|
|
|
+ return lume.chain(...)
|
|
|
+ end
|
|
|
+})
|
|
|
+
|
|
|
+
|
|
|
+return lume
|