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Jeremy Penner 2021-02-07 16:56:19 -05:00
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5
conf.lua Normal file
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function love.conf(t)
t.window.width = 1280
t.window.height = 1000
t.window.resizable = true
end

17
editor/editmode.fnl Normal file
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(local modes (require :editor.lovemode))
(local core (require :core))
(local events [])
(local editor-mode
{:draw system.draw_love_frame
:update (fn [...]
(when (and core.active_view core.active_view.handle-love-update)
(core.active_view:handle-love-update ...)))
:handler (fn [...]
(system.enqueue_love_event ...)
(when (and core.active_view core.active_view.handle-love-event)
(core.active_view:handle-love-event ...)))})
(modes:register :editor editor-mode)
{: editor-mode : events}

215
editor/imstate.fnl Normal file
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(local core (require :core))
(local config (require :core.config))
(local command (require :core.command))
(local keymap (require :core.keymap))
(local style (require :core.style))
(local lume (require :lib.lume))
(fn attach-imstate [view]
(set view.imstate {})
(fn view.on_mouse_pressed [self button x y clicks]
(tset self.imstate button :pressed)
(self.__index.on_mouse_pressed self button x y clicks))
(fn view.on_mouse_released [self button x y]
(tset self.imstate button :released)
(self.__index.on_mouse_released self button x y))
(fn view.on_key_pressed [self key]
(when (= self.imstate.keys nil)
(set self.imstate.keys []))
(table.insert self.imstate.keys key))
(fn view.on_text_input [self text]
(set self.imstate.text (.. (or self.imstate.text "") text))
(self.__index.on_text_input self text))
(fn view.draw [self]
(set self.cursor nil)
(self.__index.draw self)
(when (= self.cursor nil) (set self.cursor :arrow))
(set self.imstate.keys nil)
(set self.imstate.text nil)
(when (= self.imstate.left :released)
(set self.imstate.active nil))
(each [_ button (pairs [:left :middle :right])]
(tset self.imstate button
(match (. self.imstate button)
:pressed :down
:down :down
:released nil)))))
(fn register-keys [keys]
(local commands {})
(local keymaps {})
(each [_ key (ipairs keys)]
(local command-name (.. "imstate:" key))
(tset commands command-name #(core.active_view:on_key_pressed key))
(tset keymaps key command-name))
(command.add #(not= (-?> core.active_view.imstate (. :focus)) nil) commands)
(keymap.add keymaps))
(register-keys [:backspace :delete :left :right :shift+left :shift+right :home :end :shift+home :shift+end
:ctrl+left :ctrl+right :ctrl+shift+left :ctrl+shift+right :ctrl+c :ctrl+v])
(fn cmd-predicate [p]
(var p-fn p)
(when (= (type p-fn) :string) (set p-fn (require p-fn)))
(when (= (type p-fn) :table)
(local cls p-fn)
(set p-fn (fn [] (core.active_view:is cls))))
(fn [] (when (= (-?> core.active_view.imstate (. :focus)) nil)
(p-fn))))
(fn make-tag [tag]
(match (type tag)
:string tag
:table (table.concat tag "::")
_ (tostring tag)))
(fn mouse-inside [x y w h]
(local (mx my) (values (love.mouse.getX) (love.mouse.getY)))
(and (>= mx x) (<= mx (+ x w)) (>= my y) (<= my (+ y h))))
(fn activate [view tag x y w h]
(when (and (= view.imstate.left :pressed) (mouse-inside x y w h))
(set view.imstate.active (make-tag tag))
true))
(fn active? [view tag] (= view.imstate.active (make-tag tag)))
(fn button [view tag x y w h]
(when (mouse-inside x y w h) (set view.cursor :hand))
(activate view tag x y w h)
(and (active? view tag) (= view.imstate.left :released) (mouse-inside x y w h)))
(fn textbutton [view label x y]
(local (w h) (values (+ (style.font:get_width label) 8) 24))
(renderer.draw_rect x y w h style.selection)
(renderer.draw_text style.font label (+ x 4) (+ y 4) style.text)
(values (button view label x y w h) (+ y h)))
(fn checkbox [view name isset x y ?tag]
(love.graphics.rectangle (if isset :fill :line) x y 12 12)
(local xEnd (renderer.draw_text style.font name (+ x 16) y style.text))
(love.graphics.setColor 1 1 1 1)
(button view (or ?tag name) x y (- xEnd x) 12))
(fn focused? [view tag] (= tag (-?> view.imstate.focus (. :tag))))
(fn focus [view tag x y w h opts]
(if (activate view tag x y w h)
(set view.imstate.focus
(doto (lume.clone (or opts {}))
(tset :tag tag)))
(and (= view.imstate.left :released) (focused? view tag) (not (active? view tag)))
(set view.imstate.focus nil))
(focused? view tag))
(local blink_period 0.8)
(fn x-from-i [s i xLeft font]
(if (or (<= i 1) (= s "")) xLeft
(x-from-i (s:sub 2) (- i 1) (+ xLeft (font:get_width (s:sub 1 1))) font)))
(fn i-from-x [s x xLeft font ?i]
(local i (or ?i 1))
(local w (font:get_width (s:sub 1 1)))
(local xMid (+ xLeft (/ w 2)))
(if (or (<= x xMid) (= s "")) i
(i-from-x (s:sub 2) x (+ xLeft w) font (+ i 1))))
(fn next-match [text i di pred]
(local imax (+ (length text) 1))
(local inext (+ i di))
(if (<= inext 1) 1
(> inext imax) imax
(pred (text:sub inext inext)) (if (< di 0) i inext)
(next-match text inext di pred)))
(fn is-nonword-char [char] (config.non_word_chars:find char nil true))
(fn next-word [text i di]
(let [iwordboundary (next-match text i di #(is-nonword-char $1))]
(next-match text iwordboundary di #(not (is-nonword-char $1)))))
(fn textnav [key i text]
(local imax (+ (length text) 1))
(match key
:left (math.max 1 (- i 1))
:right (math.min imax (+ i 1))
:ctrl+left (next-word text i -1)
:ctrl+right (next-word text i 1)
:home 1
:end imax))
(fn selection-span [view]
(let [f view.imstate.focus
iStart (math.min f.i f.iAnchor)
iLim (math.max f.i f.iAnchor)]
(values iStart iLim)))
(fn selection-text [view text]
(local (iStart iLim) (selection-span view))
(text:sub iStart (- iLim 1)))
(fn replace-selection [view s replacement ?iStart ?iLim]
(local (iStart iLim) (if ?iLim (values ?iStart ?iLim) (selection-span view)))
(local text
(.. (s:sub 1 (- iStart 1))
replacement
(s:sub iLim)))
(local iNew (+ iStart (length replacement)))
(set view.imstate.focus.i iNew)
(set view.imstate.focus.iAnchor iNew)
text)
(fn textbox [view tag text x y w]
(var textNew (or text ""))
(local (h hText xText yText) (values 20 16 (+ x 2) (+ y 2)))
; handle key events
(when (focus view tag x y w h {:i 1 :iAnchor 1 :blink (love.timer.getTime)})
(local f view.imstate.focus)
(when view.imstate.text
(set textNew (replace-selection view textNew view.imstate.text)))
(each [_ key (ipairs (or view.imstate.keys []))]
(set view.imstate.focus.blink (love.timer.getTime))
(if (= key :ctrl+c) (system.set_clipboard (selection-text view textNew))
(= key :ctrl+v) (set textNew (replace-selection view textNew (system.get_clipboard)))
(key:find "shift%+") (set f.i (or (textnav (key:gsub "shift%+" "") f.i textNew) f.i))
(let [iNav (textnav key f.i textNew)]
(when iNav
(set f.i iNav)
(set f.iAnchor iNav))
(when (or (= key :delete) (= key :backspace))
(local (iStartDel iLimDel)
(if (not= f.i f.iAnchor) (selection-span view)
(= key :delete) (values f.i (+ f.i 1))
(= key :backspace) (values (math.max 1 (- f.i 1)) f.i)))
(set textNew (replace-selection view textNew "" iStartDel iLimDel)))))))
; handle mouse events
(when (mouse-inside x y w h) (set view.cursor :ibeam))
(when (and (focused? view tag) (active? view tag) (mouse-inside x y w h))
(local mouse-i (i-from-x textNew (love.mouse.getX) x style.font))
(when (= view.imstate.left :pressed)
(set view.imstate.focus.iAnchor mouse-i))
(set view.imstate.focus.i mouse-i))
; draw box
(love.graphics.setLineWidth 1)
(love.graphics.rectangle :line x y w h)
(if (focused? view tag)
; draw text with selection + caret
(let [(iStart iLim) (selection-span view)
xSelect (renderer.draw_text style.font (textNew:sub 1 (- iStart 1)) xText yText style.text)
sSelect (textNew:sub iStart (- iLim 1))
wSelect (style.font:get_width sSelect)
xTail (+ xSelect wSelect)]
(when (> wSelect 0)
(renderer.draw_rect xSelect yText wSelect hText style.selection)
(renderer.draw_text style.font sSelect xSelect yText style.text))
(renderer.draw_text style.font (textNew:sub iLim) xTail yText style.text)
(when (or (active? view tag)
(< (% (- (love.timer.getTime) view.imstate.focus.blink) (* blink_period 2)) blink_period))
(renderer.draw_rect (x-from-i textNew view.imstate.focus.i xText style.font) yText style.caret_width hText style.caret)))
; just draw the text
(renderer.draw_text style.font textNew xText yText style.text))
(love.graphics.setColor 1 1 1)
(values textNew (+ y h)))
(fn textfield [view label text x y wLabel wText]
(renderer.draw_text style.font label x y style.text)
(textbox view label text (+ x wLabel) y wText))
{: attach-imstate : cmd-predicate : mouse-inside : activate : active? : button : checkbox : textbox : textfield : textbutton}

17
editor/init.fnl Normal file
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(local util (require :lib.util))
(local core (require :core))
(local command (require :core.command))
(local keymap (require :core.keymap))
(local common (require :core.common))
(fn inline-eval [eval]
(let [ldoc core.active_view.doc
(aline acol bline bcol) (ldoc:get_selection)
inject #(ldoc:insert bline bcol (eval $1))]
(if (and (= aline bline) (= acol bcol))
(inject (ldoc:get_text aline 1 aline 10000000))
(inject (ldoc:get_text aline acol bline bcol)))))
(require :editor.editmode)
{: inline-eval}

44
editor/lovemode.fnl Normal file
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(local lume (require :lib.lume))
(local common (require :core.common))
(local style (require :core.style))
(local std-handlers love.handlers)
(local modes {:name-to-mode {}
:mode-index 1
:names []
: std-handlers})
(fn modes.cycle [self]
(set self.mode-index (+ self.mode-index 1))
(when (> self.mode-index (length self.names))
(set self.mode-index 1))
(self:switch (self:current)))
(fn modes.current [self]
(. self.name-to-mode (. self.names self.mode-index)))
(fn add-mode-cycler [handlers]
(fn mode-cycler [ev key ...]
(when (and (= ev :keyreleased) (= key :f1))
(modes:cycle))
(when (rawget handlers :any) (handlers.any ev key ...)))
(setmetatable {:any mode-cycler} {:__index handlers}))
(fn modes.switch [self mode]
(set love.handlers (add-mode-cycler (if mode.handler {:any mode.handler} std-handlers)))
(set love.update mode.update)
(set love.draw (fn []
(xpcall mode.draw (fn [msg]
(love.graphics.reset)
(love.graphics.setColor 1 0 0 1)
(love.graphics.setNewFont 14)
(love.graphics.printf (.. msg "\n" (debug.traceback))
20 20 (- (love.graphics.getWidth) 40)))))))
(fn modes.register [self name mode]
(tset self.name-to-mode name mode)
(when (not (lume.any self.names #(= $1 name)))
(table.insert self.names name))
(when (= (length self.names) 1) (self:cycle)))
modes

25
editor/modeview.fnl Normal file
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(local modes (require :editor.lovemode))
(local View (require :core.view))
(local ModeView (View:extend))
(fn ModeView.new [self mode]
(ModeView.super.new self)
(set self.mode mode))
(fn ModeView.draw [self]
(love.graphics.push :all)
(love.graphics.translate self.position.x self.position.y)
(xpcall self.mode.draw (fn [...] (love.graphics.pop) (error ...)))
(love.graphics.pop))
(fn ModeView.handle-love-update [self ...]
(when self.mode.update (self.mode.update ...)))
(fn ModeView.handle-love-event [self ev ...]
(if self.mode.handler
(self.mode.handler ev ...)
((. modes.std-handlers ev) ...)))
ModeView

12
game/entities/bomberman.fnl Normal file
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(local Entity (require :game.entity))
(local rules (require :game.rules))
(local Bomberman (Entity:extend))
(set Bomberman.keymap {:up :w :down :s :left :a :right :d :bomb :x})
(set Bomberman.color [0.2 0.2 0.2])
(fn Bomberman.update [self dt]
(Bomberman.super.update self dt)
(when (love.keyboard.isDown self.keymap.bomb)
(rules.place-bomb self.x self.y)))
Bomberman

9
game/entities/pacman.fnl Normal file
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(local Entity (require :game.entity))
(local rules (require :game.rules))
(local Pacman (Entity:extend))
(set Pacman.keymap {:up :up :down :down :left :left :right :right})
(set Pacman.color [1 1 0])
Pacman

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game/entity.fnl Normal file
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(local util (require :lib.util))
(local {: vec* : dir-from-key} (util.require :game.helpers))
(local rules (require :game.rules))
(local Object (require :core.object))
(local Entity (Object:extend))
(fn Entity.new [self x y]
(set self.x x)
(set self.y y)
(set self.velocity [0 0]))
(fn Entity.draw [self]
(when (= self.color nil)
(set self.color [(math.random) (math.random) (math.random)]))
(love.graphics.setColor (table.unpack self.color))
(love.graphics.circle :fill self.x self.y 16))
(fn Entity.move [self [dx dy]]
(set self.velocity [dx dy])
(set self.x (rules.collide :x self dx))
(set self.y (rules.collide :y self dy)))
(fn Entity.update [self dt]
(self:move (vec* (dir-from-key self.keymap) (* self.speed dt))))
(set Entity.speed 64)
Entity

12
game/helpers.fnl Normal file
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(fn dir-from-key [keymap]
(var (dx dy) (values 0 0))
(when (love.keyboard.isDown keymap.up) (set dy -1))
(when (love.keyboard.isDown keymap.down) (set dy 1))
(when (love.keyboard.isDown keymap.left) (set dx -1))
(when (love.keyboard.isDown keymap.right) (set dx 1))
[dx dy])
(fn vec* [vec scalar]
(icollect [_ v (ipairs vec)] (* v scalar)))
{: dir-from-key : vec*}

21
game/init.fnl Normal file
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(local util (require :lib.util))
(local modes (require :editor.lovemode))
(local ModeView (require :editor.modeview))
(local state (require :game.state))
(local core (require :core))
(local command (require :core.command))
(local gamemode (require :game.mode))
(modes:register :game gamemode)
(set state.entities
[((require :game.entities.bomberman) 20 20)
((require :game.entities.pacman) 350 350)])
(command.add nil {
"love:game" (fn []
(let [node (core.root_view:get_active_node)]
(node:add_view (ModeView gamemode))))
})
{}

12
game/mode.fnl Normal file
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(local state (require :game.state))
(fn update [dt]
(each [_ entity (ipairs state.entities)]
(entity:update dt)))
(fn draw []
(each [_ entity (ipairs state.entities)]
(entity:draw)))
{: update : draw}

8
game/rules.fnl Normal file
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(local state (require :game.state))
(fn collide [axis entity d]
(+ (. entity axis) d))
(fn place-bomb [x y])
{: collide : place-bomb}

1
game/state.fnl Normal file
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{}

16
game/tiles.fnl Normal file
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(local tiles
[{:name :empty
:draw (fn [])}
{:name :strongwall
:draw (fn [x y w h]
(love.graphics.setColor 0.4 0.4 0.4)
(love.graphics.rectangle :fill x y w h))}
{:name :weakwall
:draw (fn [x y w h]
(love.graphics.setColor 0.4 0.4 0.4)
(love.graphics.rectangle :fill x y w h))}
{:name :dot
:draw (fn [x y w h]
(love.graphics.setColor 1 1 1)
(love.graphics.circle :fill x y w 5))}
])

89
lib/bencode.lua Normal file
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-- Based on bencode.lua from the jeejah project by Phil Hagelberg
-- Distributed under the MIT license
-- https://gitlab.com/technomancy/jeejah/
local encode, decode
local function decode_list(str, t, total_len)
-- print("list", str, lume.serialize(t))
if #str == 0 then error("Incomplete") end
if(str:sub(1,1) == "e") then return t, total_len + 1 end
local value, v_len = decode(str)
table.insert(t, value)
total_len = total_len + v_len
return decode_list(str:sub(v_len + 1), t, total_len)
end
local function decode_table(str, t, total_len)
-- print("table", str, lume.serialize(t))
if #str == 0 then error("Incomplete") end
if(str:sub(1,1) == "e") then return t, total_len + 1 end
local key, k_len = decode(str)
local value, v_len = decode(str:sub(k_len+1))
local end_pos = 1 + k_len + v_len
t[key] = value
total_len = total_len + k_len + v_len
return decode_table(str:sub(end_pos), t, total_len)
end
function decode(str)
-- print("decoding", str)
if #str == 0 then
error("Incomplete")
elseif(str:sub(1,1) == "l") then
return decode_list(str:sub(2), {}, 1)
elseif(str:sub(1,1) == "d") then
return decode_table(str:sub(2), {}, 1)
elseif(str:sub(1,1) == "i") then
local iend = str:find("e")
if iend == nil then error("Incomplete") end
return(tonumber(str:sub(2, iend - 1))), iend
elseif(str:match("[0-9]+:")) then
local num_str = str:match("[0-9]+")
local beginning_of_string = #num_str + 2
local str_len = tonumber(num_str)
local total_len = beginning_of_string + str_len - 1
if #str < total_len then error("Incomplete") end
return str:sub(beginning_of_string, total_len), total_len
else
error("Could not parse "..str)
end
end
local function encode_str(s) return #s .. ":" .. s end
local function encode_int(n) return "i" .. tostring(n) .. "e" end
local function encode_table(t)
local s = "d"
for k,v in pairs(t) do s = s .. encode(k) .. encode(v) end
return s .. "e"
end
local function encode_list(l)
local s = "l"
for _,x in ipairs(l) do s = s .. encode(x) end
return s .. "e"
end
local function count(tbl)
local i = 0
for _ in pairs(tbl) do i = i + 1 end
return i
end
function encode(x)
local unpack = unpack or table.unpack
if(type(x) == "table" and select("#", unpack(x)) == count(x)) then
return encode_list(x)
elseif(type(x) == "table") then
return encode_table(x)
elseif(type(x) == "number" and math.floor(x) == x) then
return encode_int(x)
elseif(type(x) == "string") then
return encode_str(x)
else
error("Could not encode " .. type(x) .. ": " .. tostring(x))
end
end
return {decode=decode, encode=encode}

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-- Module options:
local always_try_using_lpeg = true
local register_global_module_table = false
local global_module_name = 'json'
--[==[
David Kolf's JSON module for Lua 5.1/5.2
Version 2.5
For the documentation see the corresponding readme.txt or visit
<http://dkolf.de/src/dkjson-lua.fsl/>.
You can contact the author by sending an e-mail to 'david' at the
domain 'dkolf.de'.
Copyright (C) 2010-2013 David Heiko Kolf
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.
--]==]
-- global dependencies:
local pairs, type, tostring, tonumber, getmetatable, setmetatable, rawset =
pairs, type, tostring, tonumber, getmetatable, setmetatable, rawset
local error, require, pcall, select = error, require, pcall, select
local floor, huge = math.floor, math.huge
local strrep, gsub, strsub, strbyte, strchar, strfind, strlen, strformat =
string.rep, string.gsub, string.sub, string.byte, string.char,
string.find, string.len, string.format
local strmatch = string.match
local concat = table.concat
local json = { version = "dkjson 2.5" }
if register_global_module_table then
_G[global_module_name] = json
end
local _ENV = nil -- blocking globals in Lua 5.2
pcall (function()
-- Enable access to blocked metatables.
-- Don't worry, this module doesn't change anything in them.
local debmeta = require "debug".getmetatable
if debmeta then getmetatable = debmeta end
end)
json.null = setmetatable ({}, {
__tojson = function () return "null" end
})
local function isarray (tbl)
local max, n, arraylen = 0, 0, 0
for k,v in pairs (tbl) do
if k == 'n' and type(v) == 'number' then
arraylen = v
if v > max then
max = v
end
else
if type(k) ~= 'number' or k < 1 or floor(k) ~= k then
return false
end
if k > max then
max = k
end
n = n + 1
end
end
if max > 10 and max > arraylen and max > n * 2 then
return false -- don't create an array with too many holes
end
return true, max
end
local escapecodes = {
["\""] = "\\\"", ["\\"] = "\\\\", ["\b"] = "\\b", ["\f"] = "\\f",
["\n"] = "\\n", ["\r"] = "\\r", ["\t"] = "\\t"
}
local function escapeutf8 (uchar)
local value = escapecodes[uchar]
if value then
return value
end
local a, b, c, d = strbyte (uchar, 1, 4)
a, b, c, d = a or 0, b or 0, c or 0, d or 0
if a <= 0x7f then
value = a
elseif 0xc0 <= a and a <= 0xdf and b >= 0x80 then
value = (a - 0xc0) * 0x40 + b - 0x80
elseif 0xe0 <= a and a <= 0xef and b >= 0x80 and c >= 0x80 then
value = ((a - 0xe0) * 0x40 + b - 0x80) * 0x40 + c - 0x80
elseif 0xf0 <= a and a <= 0xf7 and b >= 0x80 and c >= 0x80 and d >= 0x80 then
value = (((a - 0xf0) * 0x40 + b - 0x80) * 0x40 + c - 0x80) * 0x40 + d - 0x80
else
return ""
end
if value <= 0xffff then
return strformat ("\\u%.4x", value)
elseif value <= 0x10ffff then
-- encode as UTF-16 surrogate pair
value = value - 0x10000
local highsur, lowsur = 0xD800 + floor (value/0x400), 0xDC00 + (value % 0x400)
return strformat ("\\u%.4x\\u%.4x", highsur, lowsur)
else
return ""
end
end
local function fsub (str, pattern, repl)
-- gsub always builds a new string in a buffer, even when no match
-- exists. First using find should be more efficient when most strings
-- don't contain the pattern.
if strfind (str, pattern) then
return gsub (str, pattern, repl)
else
return str
end
end
local function quotestring (value)
-- based on the regexp "escapable" in https://github.com/douglascrockford/JSON-js
value = fsub (value, "[%z\1-\31\"\\\127]", escapeutf8)
if strfind (value, "[\194\216\220\225\226\239]") then
value = fsub (value, "\194[\128-\159\173]", escapeutf8)
value = fsub (value, "\216[\128-\132]", escapeutf8)
value = fsub (value, "\220\143", escapeutf8)
value = fsub (value, "\225\158[\180\181]", escapeutf8)
value = fsub (value, "\226\128[\140-\143\168-\175]", escapeutf8)
value = fsub (value, "\226\129[\160-\175]", escapeutf8)
value = fsub (value, "\239\187\191", escapeutf8)
value = fsub (value, "\239\191[\176-\191]", escapeutf8)
end
return "\"" .. value .. "\""
end
json.quotestring = quotestring
local function replace(str, o, n)
local i, j = strfind (str, o, 1, true)
if i then
return strsub(str, 1, i-1) .. n .. strsub(str, j+1, -1)
else
return str
end
end
-- locale independent num2str and str2num functions
local decpoint, numfilter
local function updatedecpoint ()
decpoint = strmatch(tostring(0.5), "([^05+])")
-- build a filter that can be used to remove group separators
numfilter = "[^0-9%-%+eE" .. gsub(decpoint, "[%^%$%(%)%%%.%[%]%*%+%-%?]", "%%%0") .. "]+"
end
updatedecpoint()
local function num2str (num)
return replace(fsub(tostring(num), numfilter, ""), decpoint, ".")
end
local function str2num (str)
local num = tonumber(replace(str, ".", decpoint))
if not num then
updatedecpoint()
num = tonumber(replace(str, ".", decpoint))
end
return num
end
local function addnewline2 (level, buffer, buflen)
buffer[buflen+1] = "\n"
buffer[buflen+2] = strrep (" ", level)
buflen = buflen + 2
return buflen
end
function json.addnewline (state)
if state.indent then
state.bufferlen = addnewline2 (state.level or 0,
state.buffer, state.bufferlen or #(state.buffer))
end
end
local encode2 -- forward declaration
local function addpair (key, value, prev, indent, level, buffer, buflen, tables, globalorder, state)
local kt = type (key)
if kt ~= 'string' and kt ~= 'number' then
return nil, "type '" .. kt .. "' is not supported as a key by JSON."
end
if prev then
buflen = buflen + 1
buffer[buflen] = ","
end
if indent then
buflen = addnewline2 (level, buffer, buflen)
end
buffer[buflen+1] = quotestring (key)
buffer[buflen+2] = ":"
return encode2 (value, indent, level, buffer, buflen + 2, tables, globalorder, state)
end
local function appendcustom(res, buffer, state)
local buflen = state.bufferlen
if type (res) == 'string' then
buflen = buflen + 1
buffer[buflen] = res
end
return buflen
end
local function exception(reason, value, state, buffer, buflen, defaultmessage)
defaultmessage = defaultmessage or reason
local handler = state.exception
if not handler then
return nil, defaultmessage
else
state.bufferlen = buflen
local ret, msg = handler (reason, value, state, defaultmessage)
if not ret then return nil, msg or defaultmessage end
return appendcustom(ret, buffer, state)
end
end
function json.encodeexception(reason, value, state, defaultmessage)
return quotestring("<" .. defaultmessage .. ">")
end
encode2 = function (value, indent, level, buffer, buflen, tables, globalorder, state)
local valtype = type (value)
local valmeta = getmetatable (value)
valmeta = type (valmeta) == 'table' and valmeta -- only tables
local valtojson = valmeta and valmeta.__tojson
if valtojson then
if tables[value] then
return exception('reference cycle', value, state, buffer, buflen)
end
tables[value] = true
state.bufferlen = buflen
local ret, msg = valtojson (value, state)
if not ret then return exception('custom encoder failed', value, state, buffer, buflen, msg) end
tables[value] = nil
buflen = appendcustom(ret, buffer, state)
elseif value == nil then
buflen = buflen + 1
buffer[buflen] = "null"
elseif valtype == 'number' then
local s
if value ~= value or value >= huge or -value >= huge then
-- This is the behaviour of the original JSON implementation.
s = "null"
else
s = num2str (value)
end
buflen = buflen + 1
buffer[buflen] = s
elseif valtype == 'boolean' then
buflen = buflen + 1
buffer[buflen] = value and "true" or "false"
elseif valtype == 'string' then
buflen = buflen + 1
buffer[buflen] = quotestring (value)
elseif valtype == 'table' then
if tables[value] then
return exception('reference cycle', value, state, buffer, buflen)
end
tables[value] = true
level = level + 1
local isa, n = isarray (value)
if n == 0 and valmeta and valmeta.__jsontype == 'object' then
isa = false
end
local msg
if isa then -- JSON array
buflen = buflen + 1
buffer[buflen] = "["
for i = 1, n do
buflen, msg = encode2 (value[i], indent, level, buffer, buflen, tables, globalorder, state)
if not buflen then return nil, msg end
if i < n then
buflen = buflen + 1
buffer[buflen] = ","
end
end
buflen = buflen + 1
buffer[buflen] = "]"
else -- JSON object
local prev = false
buflen = buflen + 1
buffer[buflen] = "{"
local order = valmeta and valmeta.__jsonorder or globalorder
if order then
local used = {}
n = #order
for i = 1, n do
local k = order[i]
local v = value[k]
if v then
used[k] = true
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
prev = true -- add a seperator before the next element
end
end
for k,v in pairs (value) do
if not used[k] then
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
if not buflen then return nil, msg end
prev = true -- add a seperator before the next element
end
end
else -- unordered
for k,v in pairs (value) do
buflen, msg = addpair (k, v, prev, indent, level, buffer, buflen, tables, globalorder, state)
if not buflen then return nil, msg end
prev = true -- add a seperator before the next element
end
end
if indent then
buflen = addnewline2 (level - 1, buffer, buflen)
end
buflen = buflen + 1
buffer[buflen] = "}"
end
tables[value] = nil
else
return exception ('unsupported type', value, state, buffer, buflen,
"type '" .. valtype .. "' is not supported by JSON.")
end
return buflen
end
function json.encode (value, state)
state = state or {}
local oldbuffer = state.buffer
local buffer = oldbuffer or {}
state.buffer = buffer
updatedecpoint()
local ret, msg = encode2 (value, state.indent, state.level or 0,
buffer, state.bufferlen or 0, state.tables or {}, state.keyorder, state)
if not ret then
error (msg, 2)
elseif oldbuffer == buffer then
state.bufferlen = ret
return true
else
state.bufferlen = nil
state.buffer = nil
return concat (buffer)
end
end
local function loc (str, where)
local line, pos, linepos = 1, 1, 0
while true do
pos = strfind (str, "\n", pos, true)
if pos and pos < where then
line = line + 1
linepos = pos
pos = pos + 1
else
break
end
end
return "line " .. line .. ", column " .. (where - linepos)
end
local function unterminated (str, what, where)
return nil, strlen (str) + 1, "unterminated " .. what .. " at " .. loc (str, where)
end
local function scanwhite (str, pos)
while true do
pos = strfind (str, "%S", pos)
if not pos then return nil end
local sub2 = strsub (str, pos, pos + 1)
if sub2 == "\239\187" and strsub (str, pos + 2, pos + 2) == "\191" then
-- UTF-8 Byte Order Mark
pos = pos + 3
elseif sub2 == "//" then
pos = strfind (str, "[\n\r]", pos + 2)
if not pos then return nil end
elseif sub2 == "/*" then
pos = strfind (str, "*/", pos + 2)
if not pos then return nil end
pos = pos + 2
else
return pos
end
end
end
local escapechars = {
["\""] = "\"", ["\\"] = "\\", ["/"] = "/", ["b"] = "\b", ["f"] = "\f",
["n"] = "\n", ["r"] = "\r", ["t"] = "\t"
}
local function unichar (value)
if value < 0 then
return nil
elseif value <= 0x007f then
return strchar (value)
elseif value <= 0x07ff then
return strchar (0xc0 + floor(value/0x40),
0x80 + (floor(value) % 0x40))
elseif value <= 0xffff then
return strchar (0xe0 + floor(value/0x1000),
0x80 + (floor(value/0x40) % 0x40),
0x80 + (floor(value) % 0x40))
elseif value <= 0x10ffff then
return strchar (0xf0 + floor(value/0x40000),
0x80 + (floor(value/0x1000) % 0x40),
0x80 + (floor(value/0x40) % 0x40),
0x80 + (floor(value) % 0x40))
else
return nil
end
end
local function scanstring (str, pos)
local lastpos = pos + 1
local buffer, n = {}, 0
while true do
local nextpos = strfind (str, "[\"\\]", lastpos)
if not nextpos then
return unterminated (str, "string", pos)
end
if nextpos > lastpos then
n = n + 1
buffer[n] = strsub (str, lastpos, nextpos - 1)
end
if strsub (str, nextpos, nextpos) == "\"" then
lastpos = nextpos + 1
break
else
local escchar = strsub (str, nextpos + 1, nextpos + 1)
local value
if escchar == "u" then
value = tonumber (strsub (str, nextpos + 2, nextpos + 5), 16)
if value then
local value2
if 0xD800 <= value and value <= 0xDBff then
-- we have the high surrogate of UTF-16. Check if there is a
-- low surrogate escaped nearby to combine them.
if strsub (str, nextpos + 6, nextpos + 7) == "\\u" then
value2 = tonumber (strsub (str, nextpos + 8, nextpos + 11), 16)
if value2 and 0xDC00 <= value2 and value2 <= 0xDFFF then
value = (value - 0xD800) * 0x400 + (value2 - 0xDC00) + 0x10000
else
value2 = nil -- in case it was out of range for a low surrogate
end
end
end
value = value and unichar (value)
if value then
if value2 then
lastpos = nextpos + 12
else
lastpos = nextpos + 6
end
end
end
end
if not value then
value = escapechars[escchar] or escchar
lastpos = nextpos + 2
end
n = n + 1
buffer[n] = value
end
end
if n == 1 then
return buffer[1], lastpos
elseif n > 1 then
return concat (buffer), lastpos
else
return "", lastpos
end
end
local scanvalue -- forward declaration
local function scantable (what, closechar, str, startpos, nullval, objectmeta, arraymeta)
local len = strlen (str)
local tbl, n = {}, 0
local pos = startpos + 1
if what == 'object' then
setmetatable (tbl, objectmeta)
else
setmetatable (tbl, arraymeta)
end
while true do
pos = scanwhite (str, pos)
if not pos then return unterminated (str, what, startpos) end
local char = strsub (str, pos, pos)
if char == closechar then
return tbl, pos + 1
end
local val1, err
val1, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta)
if err then return nil, pos, err end
pos = scanwhite (str, pos)
if not pos then return unterminated (str, what, startpos) end
char = strsub (str, pos, pos)
if char == ":" then
if val1 == nil then
return nil, pos, "cannot use nil as table index (at " .. loc (str, pos) .. ")"
end
pos = scanwhite (str, pos + 1)
if not pos then return unterminated (str, what, startpos) end
local val2
val2, pos, err = scanvalue (str, pos, nullval, objectmeta, arraymeta)
if err then return nil, pos, err end
tbl[val1] = val2
pos = scanwhite (str, pos)
if not pos then return unterminated (str, what, startpos) end
char = strsub (str, pos, pos)
else
n = n + 1
tbl[n] = val1
end
if char == "," then
pos = pos + 1
end
end
end
scanvalue = function (str, pos, nullval, objectmeta, arraymeta)
pos = pos or 1
pos = scanwhite (str, pos)
if not pos then
return nil, strlen (str) + 1, "no valid JSON value (reached the end)"
end
local char = strsub (str, pos, pos)
if char == "{" then
return scantable ('object', "}", str, pos, nullval, objectmeta, arraymeta)
elseif char == "[" then
return scantable ('array', "]", str, pos, nullval, objectmeta, arraymeta)
elseif char == "\"" then
return scanstring (str, pos)
else
local pstart, pend = strfind (str, "^%-?[%d%.]+[eE]?[%+%-]?%d*", pos)
if pstart then
local number = str2num (strsub (str, pstart, pend))
if number then
return number, pend + 1
end
end
pstart, pend = strfind (str, "^%a%w*", pos)
if pstart then
local name = strsub (str, pstart, pend)
if name == "true" then
return true, pend + 1
elseif name == "false" then
return false, pend + 1
elseif name == "null" then
return nullval, pend + 1
end
end
return nil, pos, "no valid JSON value at " .. loc (str, pos)
end
end
local function optionalmetatables(...)
if select("#", ...) > 0 then
return ...
else
return {__jsontype = 'object'}, {__jsontype = 'array'}
end
end
function json.decode (str, pos, nullval, ...)
local objectmeta, arraymeta = optionalmetatables(...)
return scanvalue (str, pos, nullval, objectmeta, arraymeta)
end
function json.use_lpeg ()
local g = require ("lpeg")
if g.version() == "0.11" then
error "due to a bug in LPeg 0.11, it cannot be used for JSON matching"
end
local pegmatch = g.match
local P, S, R = g.P, g.S, g.R
local function ErrorCall (str, pos, msg, state)
if not state.msg then
state.msg = msg .. " at " .. loc (str, pos)
state.pos = pos
end
return false
end
local function Err (msg)
return g.Cmt (g.Cc (msg) * g.Carg (2), ErrorCall)
end
local SingleLineComment = P"//" * (1 - S"\n\r")^0
local MultiLineComment = P"/*" * (1 - P"*/")^0 * P"*/"
local Space = (S" \n\r\t" + P"\239\187\191" + SingleLineComment + MultiLineComment)^0
local PlainChar = 1 - S"\"\\\n\r"
local EscapeSequence = (P"\\" * g.C (S"\"\\/bfnrt" + Err "unsupported escape sequence")) / escapechars
local HexDigit = R("09", "af", "AF")
local function UTF16Surrogate (match, pos, high, low)
high, low = tonumber (high, 16), tonumber (low, 16)
if 0xD800 <= high and high <= 0xDBff and 0xDC00 <= low and low <= 0xDFFF then
return true, unichar ((high - 0xD800) * 0x400 + (low - 0xDC00) + 0x10000)
else
return false
end
end
local function UTF16BMP (hex)
return unichar (tonumber (hex, 16))
end
local U16Sequence = (P"\\u" * g.C (HexDigit * HexDigit * HexDigit * HexDigit))
local UnicodeEscape = g.Cmt (U16Sequence * U16Sequence, UTF16Surrogate) + U16Sequence/UTF16BMP
local Char = UnicodeEscape + EscapeSequence + PlainChar
local String = P"\"" * g.Cs (Char ^ 0) * (P"\"" + Err "unterminated string")
local Integer = P"-"^(-1) * (P"0" + (R"19" * R"09"^0))
local Fractal = P"." * R"09"^0
local Exponent = (S"eE") * (S"+-")^(-1) * R"09"^1
local Number = (Integer * Fractal^(-1) * Exponent^(-1))/str2num
local Constant = P"true" * g.Cc (true) + P"false" * g.Cc (false) + P"null" * g.Carg (1)
local SimpleValue = Number + String + Constant
local ArrayContent, ObjectContent
-- The functions parsearray and parseobject parse only a single value/pair
-- at a time and store them directly to avoid hitting the LPeg limits.
local function parsearray (str, pos, nullval, state)
local obj, cont
local npos
local t, nt = {}, 0
repeat
obj, cont, npos = pegmatch (ArrayContent, str, pos, nullval, state)
if not npos then break end
pos = npos
nt = nt + 1
t[nt] = obj
until cont == 'last'
return pos, setmetatable (t, state.arraymeta)
end
local function parseobject (str, pos, nullval, state)
local obj, key, cont
local npos
local t = {}
repeat
key, obj, cont, npos = pegmatch (ObjectContent, str, pos, nullval, state)
if not npos then break end
pos = npos
t[key] = obj
until cont == 'last'
return pos, setmetatable (t, state.objectmeta)
end
local Array = P"[" * g.Cmt (g.Carg(1) * g.Carg(2), parsearray) * Space * (P"]" + Err "']' expected")
local Object = P"{" * g.Cmt (g.Carg(1) * g.Carg(2), parseobject) * Space * (P"}" + Err "'}' expected")
local Value = Space * (Array + Object + SimpleValue)
local ExpectedValue = Value + Space * Err "value expected"
ArrayContent = Value * Space * (P"," * g.Cc'cont' + g.Cc'last') * g.Cp()
local Pair = g.Cg (Space * String * Space * (P":" + Err "colon expected") * ExpectedValue)
ObjectContent = Pair * Space * (P"," * g.Cc'cont' + g.Cc'last') * g.Cp()
local DecodeValue = ExpectedValue * g.Cp ()
function json.decode (str, pos, nullval, ...)
local state = {}
state.objectmeta, state.arraymeta = optionalmetatables(...)
local obj, retpos = pegmatch (DecodeValue, str, pos, nullval, state)
if state.msg then
return nil, state.pos, state.msg
else
return obj, retpos
end
end
-- use this function only once:
json.use_lpeg = function () return json end
json.using_lpeg = true
return json -- so you can get the module using json = require "dkjson".use_lpeg()
end
if always_try_using_lpeg then
pcall (json.use_lpeg)
end
return json

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--
-- lume
--
-- Copyright (c) 2020 rxi
--
-- 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 lume = { _version = "2.3.0" }
local pairs, ipairs = pairs, ipairs
local type, assert, unpack = type, assert, unpack or table.unpack
local tostring, tonumber = tostring, tonumber
local math_floor = math.floor
local math_ceil = math.ceil
local math_atan2 = math.atan2 or math.atan
local math_sqrt = math.sqrt
local math_abs = math.abs
local noop = function()
end
local identity = function(x)
return x
end
local patternescape = function(str)
return str:gsub("[%(%)%.%%%+%-%*%?%[%]%^%$]", "%%%1")
end
local absindex = function(len, i)
return i < 0 and (len + i + 1) or i
end
local iscallable = function(x)
if type(x) == "function" then return true end
local mt = getmetatable(x)
return mt and mt.__call ~= nil
end
local getiter = function(x)
if lume.isarray(x) then
return ipairs
elseif type(x) == "table" then
return pairs
end
error("expected table", 3)
end
local iteratee = function(x)
if x == nil then return identity end
if iscallable(x) then return x end
if type(x) == "table" then
return function(z)
for k, v in pairs(x) do
if z[k] ~= v then return false end
end
return true
end
end
return function(z) return z[x] end
end
function lume.clamp(x, min, max)
return x < min and min or (x > max and max or x)
end
function lume.round(x, increment)
if increment then return lume.round(x / increment) * increment end
return x >= 0 and math_floor(x + .5) or math_ceil(x - .5)
end
function lume.sign(x)
return x < 0 and -1 or 1
end
function lume.lerp(a, b, amount)
return a + (b - a) * lume.clamp(amount, 0, 1)
end
function lume.smooth(a, b, amount)
local t = lume.clamp(amount, 0, 1)
local m = t * t * (3 - 2 * t)
return a + (b - a) * m
end
function lume.pingpong(x)
return 1 - math_abs(1 - x % 2)
end
function lume.distance(x1, y1, x2, y2, squared)
local dx = x1 - x2
local dy = y1 - y2
local s = dx * dx + dy * dy
return squared and s or math_sqrt(s)
end
function lume.angle(x1, y1, x2, y2)
return math_atan2(y2 - y1, x2 - x1)
end
function lume.vector(angle, magnitude)
return math.cos(angle) * magnitude, math.sin(angle) * magnitude
end
function lume.random(a, b)
if not a then a, b = 0, 1 end
if not b then b = 0 end
return a + math.random() * (b - a)
end
function lume.randomchoice(t)
return t[math.random(#t)]
end
function lume.weightedchoice(t)
local sum = 0
for _, v in pairs(t) do
assert(v >= 0, "weight value less than zero")
sum = sum + v
end
assert(sum ~= 0, "all weights are zero")
local rnd = lume.random(sum)
for k, v in pairs(t) do
if rnd < v then return k end
rnd = rnd - v
end
end
function lume.isarray(x)
return type(x) == "table" and x[1] ~= nil
end
function lume.push(t, ...)
local n = select("#", ...)
for i = 1, n do
t[#t + 1] = select(i, ...)
end
return ...
end
function lume.remove(t, x)
local iter = getiter(t)
for i, v in iter(t) do
if v == x then
if lume.isarray(t) then
table.remove(t, i)
break
else
t[i] = nil
break
end
end
end
return x
end
function lume.clear(t)
local iter = getiter(t)
for k in iter(t) do
t[k] = nil
end
return t
end
function lume.extend(t, ...)
for i = 1, select("#", ...) do
local x = select(i, ...)
if x then
for k, v in pairs(x) do
t[k] = v
end
end
end
return t
<