Initial commit of test/ugly/prototype code.

.gitignore

@@ -0,0 +1,2 @@
+openwrt
+sdk

README

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+This is the Hackerspace Warsaw electronic lock mk2 project.
+
+Work in progress! This is a prototype for a TP-Link WR703n based hardware
+solution - with a I2C bus on which there is a MAX7300 IO expander and a PN532
+NFC tag reader. The I2C is software bit-banged by the kernel, drivers for both
+the IO expander and the PN532 are written in Lua.
+
+Files:
+    hslockmk2/                       - this directory
+             /code.lua               - main Lua source code
+             /lua-libs/              - necessary Lua libraries
+                      /mips-bin/     - C libraries compiled for MIPS/OpenWRT
+                      luai2c.tar.gz  - C i2c library
+                      luasha2.tar.gz - C sha2 library
+                      JSON.lua       - JSON library
+                      bit.lua        - bitwise operations for Lua 5.1
+
+You will additonally need luasec, luaposix and luasocket. But you can easily
+find these in your favourite distribution, or even the OpenWRT source tree.

code.lua

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+-- The MIT License (MIT)
+-- 
+-- Copyright (c) 2013 Sergiusz 'q3k' Bazański <q3k@q3k.org>
+--
+-- 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.
+
+-- This is the HSWAW lock mk2. source code. WIP. refucktor badly needed.
+
+local i2c = require("libluai2c")
+require('bit')
+require('socket')
+require('posix')
+local sha2 = require('libsha2')
+local https = require('ssl.https')
+
+q3k = {}
+q3k.Config = {}
+
+q3k.Config.I2CBus = 0
+
+q3k.Config.I2CGPIO = 0x40
+q3k.Config.I2CNFC = 0x24
+
+q3k.I2CWrite = function(Address, ...)
+    local Data = {...}
+    local Bytes = string.format("%02x ", Address)
+    for _, Byte in pairs(Data) do
+        Bytes = Bytes .. string.format("%02x ", Byte)
+    end
+    local DataString = string.char(unpack(Data))
+    return i2c.write(q3k.Config.I2CBus, Address, DataString)
+end
+
+q3k.I2CRead = function(Address, BytesOut, ...)
+    local Data = {...}
+    local DataString = string.char(unpack(Data))
+    local Status, Data = i2c.read(q3k.Config.I2CBus, Address, BytesOut, DataString)
+    local Return = {}
+
+    if Status == 0 then
+        Data:gsub(".", function(c)
+            Return[#Return+1] = string.byte(c)
+        end)
+        return Return
+    end
+end
+
+-- sigh. luaposix on openwrt doesn't have nanosleep()
+q3k.Sleep = function(Seconds)
+    socket.select(nil, nil, Seconds)
+end
+
+-- GPIO Functions
+q3k.SetupGPIO = function()
+    -- Set up pins 28, 29, 30, 31 as output
+    q3k.I2CWrite(q3k.Config.I2CGPIO, 0x0F, 0x55)
+    q3k.DoorClose()
+    -- Set up pins 12, 13, 14, 15 as input without pullups
+    q3k.I2CWrite(q3k.Config.I2CGPIO, 0x0B, 0xAA)
+
+    -- Turn on GPIO Multiplexer
+    q3k.I2CWrite(q3k.Config.I2CGPIO, 0x04, 0x01)
+end
+
+q3k.DoorOpen = function()
+     -- Turn on pin 31 (door)
+        q3k.I2CWrite(q3k.Config.I2CGPIO, 0x3F, 0x01)
+end
+
+q3k.DoorClose = function()
+     -- Turn off pin 31 (door)
+        q3k.I2CWrite(q3k.Config.I2CGPIO, 0x3F, 0x00)
+end
+
+-- NFC (PN532) functions
+local PN532_PREAMBLE = 0x00
+local PN532_STARTCODE1 = 0x00
+local PN532_STARTCODE2 = 0xFF
+local PN532_POSTAMBLE = 0x00
+
+local PN532_HOSTTOPN532 = 0xD4
+local PN532_PN532TOHOST = 0xD5
+
+q3k.NFCIRQRead = function()
+    local Data = q3k.I2CRead(q3k.Config.I2CGPIO, 1, 0x2C)
+    if Data then
+        return Data[1]
+    else
+        return 1
+    end
+end
+
+q3k.NFCWaitForIRQ = function(Timeout)
+    local Timeout = Timeout or 5
+    local WaitStart = os.time()
+    while os.time() < WaitStart + Timeout do
+        local IRQStatus = q3k.NFCIRQRead()
+          if IRQStatus == 0 then
+            break
+        end
+        q3k.Sleep(0.2)
+    end
+    local IRQStatus = q3k.NFCIRQRead()
+        if IRQStatus ~= 0 then
+                return false
+        end
+    return true
+end
+
+q3k.NFCWriteCommand = function(...)
+    local Command = {...}
+    local Checksum = PN532_PREAMBLE + PN532_STARTCODE1 + PN532_STARTCODE2
+    local WireCommand = { PN532_PREAMBLE, PN532_STARTCODE1, PN532_STARTCODE2 }
+
+    WireCommand[#WireCommand+1] = (#Command + 1)
+    WireCommand[#WireCommand+1] = bit.band(bit.bnot(#Command +1) + 1, 0xFF)
+
+    Checksum = Checksum + PN532_HOSTTOPN532
+    WireCommand[#WireCommand+1] = PN532_HOSTTOPN532
+
+    for _, Byte in pairs(Command) do
+        Checksum = Checksum + Byte
+        WireCommand[#WireCommand+1] = Byte
+    end
+
+    WireCommand[#WireCommand+1] = bit.band(bit.bnot(Checksum), 0xFF)
+    WireCommand[#WireCommand+1] = PN532_POSTAMBLE
+
+    q3k.I2CWrite(q3k.Config.I2CNFC, unpack(WireCommand))
+end
+
+q3k.NFCSendAndAck = function(...)
+    q3k.NFCWriteCommand(...)
+    local IRQArrived = q3k.NFCWaitForIRQ()
+    if not IRQArrived then
+        return false
+    end
+    local ACK = q3k.I2CRead(q3k.Config.I2CNFC, 8)
+    if ACK[1] == 1 and ACK[2] == 0 and ACK[3] == 0 and ACK[4] == 255 
+        and ACK[5] == 0 and ACK[6] == 255 and ACK[7] == 0 then
+        return true
+    else
+        return false
+    end
+end
+
+q3k.NFCReadFrame = function(Count)
+    local Bytes = q3k.I2CRead(q3k.Config.I2CNFC, Count+2)
+    table.remove(Bytes, 1)
+    table.remove(Bytes, #Bytes)
+    return Bytes
+end
+
+-- Mock until we have a keypad
+q3k.ReadPIN = function()
+    print "[mock] Entering PIN..."
+    q3k.Sleep(2)
+    print "[mock] PIN entered."
+    return { 0, 0, 0, 0 }
+end
+
+-- API stuff
+
+-- the PIN is a table like { 1, 2, 3, 4 }
+-- the NFC ID is a table like { 0xde, 0xad, 0xbe, 0xef }
+q3k.CalculateHash = function(PIN, NFCID)
+    local PINString = string.format("%i%i%i%i", PIN[1], PIN[2], PIN[3], PIN[4])
+    local PINNumber = tonumber(PINString)
+    local IDString = string.format("%02x%02x%02x%02x", NFCID[4], NFCID[3], NFCID[2], NFCID[1])
+    local Source = string.format("%08x:%s", PINNumber, IDString)
+    return sha2.sha256hex(Source)
+end
+
+q3k.GetUserFromHash = function(Hash)
+    local Body, Code, Headers, Status = https.request('https://auth.hackerspace.pl/mifare', 'hash=' .. Hash)
+    if Code ~= 200 then
+        return nil
+    end
+    if #Body > 100 then
+        -- probably an error code
+        return nil
+    end
+    return Body
+end
+
+-- debug bytes
+local db = function(Data)
+    local s = ""
+    for _, Byte in pairs(Data) do
+        s = s .. string.format("%02x ", Byte)
+    end
+    print(s)
+end
+
+local main = function()
+    q3k.SetupGPIO()
+    q3k.NFCSendAndAck(0x14, 0x01, 0x14, 0x01)
+
+    while true do
+        q3k.NFCSendAndAck(0x4A, 1, 0)
+        if q3k.NFCWaitForIRQ(120) then
+            print "Card arrived in field"
+            local Bytes = q3k.NFCReadFrame(20)
+            if Bytes ~= nil and #Bytes == 20 then
+                local NFCID = { Bytes[14], Bytes[15], Bytes[16], Bytes[17] }
+                local Hash = q3k.CalculateHash(q3k.ReadPIN(), NFCID)
+                local User = q3k.GetUserFromHash(Hash) 
+                if User == nil then
+                    print "FAILED! no such user!"
+                else
+                    print(string.format("User: %s", User))
+                end
+            end
+        end
+    end
+end
+
+main()

lua-libs/JSON.lua

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+-- -*- coding: utf-8 -*-
+--
+-- Copyright 2010-2013 Jeffrey Friedl
+-- http://regex.info/blog/
+--
+-- Latest copy: http://regex.info/blog/lua/json
+--
+local VERSION = 20130120.6  -- version history at end of file
+local OBJDEF = { VERSION = VERSION }
+
+--
+-- Simple JSON encoding and decoding in pure Lua.
+-- http://www.json.org/
+--
+--
+--   JSON = (loadfile "JSON.lua")() -- one-time load of the routines
+--
+--   local lua_value = JSON:decode(raw_json_text)
+--
+--   local raw_json_text    = JSON:encode(lua_table_or_value)
+--   local pretty_json_text = JSON:encode_pretty(lua_table_or_value) -- "pretty printed" version for human readability
+--
+--
+-- DECODING
+--
+--   JSON = (loadfile "JSON.lua")() -- one-time load of the routines
+--
+--   local lua_value = JSON:decode(raw_json_text)
+--
+--   If the JSON text is for an object or an array, e.g.
+--     { "what": "books", "count": 3 }
+--   or
+--     [ "Larry", "Curly", "Moe" ]
+--
+--   the result is a Lua table, e.g.
+--     { what = "books", count = 3 }
+--   or
+--     { "Larry", "Curly", "Moe" }
+--
+--
+--   The encode and decode routines accept an optional second argument, "etc", which is not used
+--   during encoding or decoding, but upon error is passed along to error handlers. It can be of any
+--   type (including nil).
+--
+--   With most errors during decoding, this code calls
+--
+--      JSON:onDecodeError(message, text, location, etc)
+--
+--   with a message about the error, and if known, the JSON text being parsed and the byte count
+--   where the problem was discovered. You can replace the default JSON:onDecodeError() with your
+--   own function.
+--
+--   The default onDecodeError() merely augments the message with data about the text and the
+--   location if known (and if a second 'etc' argument had been provided to decode(), its value is
+--   tacked onto the message as well), and then calls JSON.assert(), which itself defaults to Lua's
+--   built-in assert(), and can also be overridden.
+--
+--   For example, in an Adobe Lightroom plugin, you might use something like
+--
+--          function JSON:onDecodeError(message, text, location, etc)
+--             LrErrors.throwUserError("Internal Error: invalid JSON data")
+--          end
+--
+--   or even just
+--
+--          function JSON.assert(message)
+--             LrErrors.throwUserError("Internal Error: " .. message)
+--          end
+--
+--   If JSON:decode() is passed a nil, this is called instead:
+--
+--      JSON:onDecodeOfNilError(message, nil, nil, etc)
+--
+--   and if JSON:decode() is passed HTML instead of JSON, this is called:
+--
+--      JSON:onDecodeOfHTMLError(message, text, nil, etc)
+--
+--   The use of the fourth 'etc' argument allows stronger coordination between decoding and error
+--   reporting, especially when you provide your own error-handling routines. Continuing with the
+--   the Adobe Lightroom plugin example:
+--
+--          function JSON:onDecodeError(message, text, location, etc)
+--             local note = "Internal Error: invalid JSON data"
+--             if type(etc) = 'table' and etc.photo then
+--                note = note .. " while processing for " .. etc.photo:getFormattedMetadata('fileName')
+--             end
+--             LrErrors.throwUserError(note)
+--          end
+--
+--            :
+--            :
+--
+--          for i, photo in ipairs(photosToProcess) do
+--               :             
+--               :             
+--               local data = JSON:decode(someJsonText, { photo = photo })
+--               :             
+--               :             
+--          end
+--
+--
+--
+--
+
+-- DECODING AND STRICT TYPES
+--
+--   Because both JSON objects and JSON arrays are converted to Lua tables, it's not normally
+--   possible to tell which a Lua table came from, or guarantee decode-encode round-trip
+--   equivalency.
+--
+--   However, if you enable strictTypes, e.g.
+--
+--      JSON = (loadfile "JSON.lua")() --load the routines
+--      JSON.strictTypes = true
+--
+--   then the Lua table resulting from the decoding of a JSON object or JSON array is marked via Lua
+--   metatable, so that when re-encoded with JSON:encode() it ends up as the appropriate JSON type.
+--
+--   (This is not the default because other routines may not work well with tables that have a
+--   metatable set, for example, Lightroom API calls.)
+--
+--
+-- ENCODING
+--
+--   JSON = (loadfile "JSON.lua")() -- one-time load of the routines
+--
+--   local raw_json_text    = JSON:encode(lua_table_or_value)
+--   local pretty_json_text = JSON:encode_pretty(lua_table_or_value) -- "pretty printed" version for human readability
+
+--   On error during encoding, this code calls:
+--
+--    JSON:onEncodeError(message, etc)
+--
+--   which you can override in your local JSON object.
+--
+--
+-- SUMMARY OF METHODS YOU CAN OVERRIDE IN YOUR LOCAL LUA JSON OBJECT
+--
+--    assert
+--    onDecodeError
+--    onDecodeOfNilError
+--    onDecodeOfHTMLError
+--    onEncodeError
+--
+--  If you want to create a separate Lua JSON object with its own error handlers,
+--  you can reload JSON.lua or use the :new() method.
+--
+---------------------------------------------------------------------------
+
+
+local author = "-[ JSON.lua package by Jeffrey Friedl (http://regex.info/blog/lua/json), version " .. tostring(VERSION) .. " ]-"
+local isArray  = { __tostring = function() return "JSON array"  end }    isArray.__index  = isArray
+local isObject = { __tostring = function() return "JSON object" end }    isObject.__index = isObject
+
+
+function OBJDEF:newArray(tbl)
+   return setmetatable(tbl or {}, isArray)
+end
+
+function OBJDEF:newObject(tbl)
+   return setmetatable(tbl or {}, isObject)
+end
+
+local function unicode_codepoint_as_utf8(codepoint)
+   --
+   -- codepoint is a number
+   --
+   if codepoint <= 127 then
+      return string.char(codepoint)
+
+   elseif codepoint <= 2047 then
+      --
+      -- 110yyyxx 10xxxxxx         <-- useful notation from http://en.wikipedia.org/wiki/Utf8
+      --
+      local highpart = math.floor(codepoint / 0x40)
+      local lowpart  = codepoint - (0x40 * highpart)
+      return string.char(0xC0 + highpart,
+                         0x80 + lowpart)
+
+   elseif codepoint <= 65535 then
+      --
+      -- 1110yyyy 10yyyyxx 10xxxxxx
+      --
+      local highpart  = math.floor(codepoint / 0x1000)
+      local remainder = codepoint - 0x1000 * highpart
+      local midpart   = math.floor(remainder / 0x40)
+      local lowpart   = remainder - 0x40 * midpart
+
+      highpart = 0xE0 + highpart
+      midpart  = 0x80 + midpart
+      lowpart  = 0x80 + lowpart
+
+      --
+      -- Check for an invalid character (thanks Andy R. at Adobe).
+      -- See table 3.7, page 93, in http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf#G28070
+      --
+      if ( highpart == 0xE0 and midpart < 0xA0 ) or
+         ( highpart == 0xED and midpart > 0x9F ) or
+         ( highpart == 0xF0 and midpart < 0x90 ) or
+         ( highpart == 0xF4 and midpart > 0x8F )
+      then
+         return "?"
+      else
+         return string.char(highpart,
+                            midpart,
+                            lowpart)
+      end
+
+   else
+      --
+      -- 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx
+      --
+      local highpart  = math.floor(codepoint / 0x40000)
+      local remainder = codepoint - 0x40000 * highpart
+      local midA      = math.floor(remainder / 0x1000)
+      remainder       = remainder - 0x1000 * midA
+      local midB      = math.floor(remainder / 0x40)
+      local lowpart   = remainder - 0x40 * midB
+
+      return string.char(0xF0 + highpart,
+                         0x80 + midA,
+                         0x80 + midB,
+                         0x80 + lowpart)
+   end
+end
+
+function OBJDEF:onDecodeError(message, text, location, etc)
+   if text then
+      if location then
+         message = string.format("%s at char %d of: %s", message, location, text)
+      else
+         message = string.format("%s: %s", message, text)
+      end
+   end
+   if etc ~= nil then
+      message = message .. " (" .. OBJDEF:encode(etc) .. ")"
+   end
+
+   if self.assert then
+      self.assert(false, message)
+   else
+      assert(false, message)
+   end
+end
+
+OBJDEF.onDecodeOfNilError  = OBJDEF.onDecodeError
+OBJDEF.onDecodeOfHTMLError = OBJDEF.onDecodeError
+
+function OBJDEF:onEncodeError(message, etc)
+   if etc ~= nil then
+      message = message .. " (" .. OBJDEF:encode(etc) .. ")"
+   end
+
+   if self.assert then
+      self.assert(false, message)
+   else
+      assert(false, message)
+   end
+end
+
+local function grok_number(self, text, start, etc)
+   --
+   -- Grab the integer part
+   --
+   local integer_part = text:match('^-?[1-9]%d*', start)
+                     or text:match("^-?0",        start)
+
+   if not integer_part then
+      self:onDecodeError("expected number", text, start, etc)
+   end
+
+   local i = start + integer_part:len()
+
+   --
+   -- Grab an optional decimal part
+   --
+   local decimal_part = text:match('^%.%d+', i) or ""
+
+   i = i + decimal_part:len()
+
+   --
+   -- Grab an optional exponential part
+   --
+   local exponent_part = text:match('^[eE][-+]?%d+', i) or ""
+
+   i = i + exponent_part:len()
+
+   local full_number_text = integer_part .. decimal_part .. exponent_part
+   local as_number = tonumber(full_number_text)
+
+   if not as_number then
+      self:onDecodeError("bad number", text, start, etc)
+   end
+
+   return as_number, i
+end
+
+
+local function grok_string(self, text, start, etc)
+
+   if text:sub(start,start) ~= '"' then
+      self:onDecodeError("expected string's opening quote", text, start, etc)
+   end
+
+   local i = start + 1 -- +1 to bypass the initial quote
+   local text_len = text:len()
+   local VALUE = ""
+   while i <= text_len do
+      local c = text:sub(i,i)
+      if c == '"' then
+         return VALUE, i + 1
+      end
+      if c ~= '\\' then
+         VALUE = VALUE .. c
+         i = i + 1
+      elseif text:match('^\\b', i) then
+         VALUE = VALUE .. "\b"
+         i = i + 2
+      elseif text:match('^\\f', i) then
+         VALUE = VALUE .. "\f"
+         i = i + 2
+      elseif text:match('^\\n', i) then
+         VALUE = VALUE .. "\n"
+         i = i + 2
+      elseif text:match('^\\r', i) then
+         VALUE = VALUE .. "\r"
+         i = i + 2
+      elseif text:match('^\\t', i) then
+         VALUE = VALUE .. "\t"
+         i = i + 2
+      else
+         local hex = text:match('^\\u([0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF])', i)
+         if hex then
+            i = i + 6 -- bypass what we just read
+
+            -- We have a Unicode codepoint. It could be standalone, or if in the proper range and
+            -- followed by another in a specific range, it'll be a two-code surrogate pair.
+            local codepoint = tonumber(hex, 16)
+            if codepoint >= 0xD800 and codepoint <= 0xDBFF then
+               -- it's a hi surrogate... see whether we have a following low
+               local lo_surrogate = text:match('^\\u([dD][cdefCDEF][0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF])', i)
+               if lo_surrogate then
+                  i = i + 6 -- bypass the low surrogate we just read
+                  codepoint = 0x2400 + (codepoint - 0xD800) * 0x400 + tonumber(lo_surrogate, 16)
+               else
+                  -- not a proper low, so we'll just leave the first codepoint as is and spit it out.
+               end
+            end
+            VALUE = VALUE .. unicode_codepoint_as_utf8(codepoint)
+
+         else
+
+            -- just pass through what's escaped
+            VALUE = VALUE .. text:match('^\\(.)', i)
+            i = i + 2
+         end
+      end
+   end
+
+   self:onDecodeError("unclosed string", text, start, etc)
+end
+
+local function skip_whitespace(text, start)
+
+   local match_start, match_end = text:find("^[ \n\r\t]+", start) -- [http://www.ietf.org/rfc/rfc4627.txt] Section 2
+   if match_end then
+      return match_end + 1
+   else
+      return start
+   end
+end
+
+local grok_one -- assigned later
+
+local function grok_object(self, text, start, etc)
+   if not text:sub(start,start) == '{' then
+      self:onDecodeError("expected '{'", text, start, etc)
+   end
+
+   local i = skip_whitespace(text, start + 1) -- +1 to skip the '{'
+
+   local VALUE = self.strictTypes and self:newObject { } or { }
+
+   if text:sub(i,i) == '}' then
+      return VALUE, i + 1
+   end
+   local text_len = text:len()
+   while i <= text_len do
+      local key, new_i = grok_string(self, text, i, etc)
+
+      i = skip_whitespace(text, new_i)
+
+      if text:sub(i, i) ~= ':' then
+         self:onDecodeError("expected colon", text, i, etc)
+      end
+
+      i = skip_whitespace(text, i + 1)
+
+      local val, new_i = grok_one(self, text, i)
+
+      VALUE[key] = val
+
+      --
+      -- Expect now either '}' to end things, or a ',' to allow us to continue.
+      --
+      i = skip_whitespace(text, new_i)
+
+      local c = text:sub(i,i)
+
+      if c == '}' then
+         return VALUE, i + 1
+      end
+
+      if text:sub(i, i) ~= ',' then
+         self:onDecodeError("expected comma or '}'", text, i, etc)
+      end
+
+      i = skip_whitespace(text, i + 1)
+   end
+
+   self:onDecodeError("unclosed '{'", text, start, etc)
+end
+
+local function grok_array(self, text, start, etc)
+   if not text:sub(start,start) == '[' then
+      self:onDecodeError("expected '['", text, start, etc)
+   end
+
+   local i = skip_whitespace(text, start + 1) -- +1 to skip the '['
+   local VALUE = self.strictTypes and self:newArray { } or { }
+   if text:sub(i,i) == ']' then
+      return VALUE, i + 1
+   end
+
+   local text_len = text:len()
+   while i <= text_len do
+      local val, new_i = grok_one(self, text, i)
+
+      table.insert(VALUE, val)
+
+      i = skip_whitespace(text, new_i)
+
+      --
+      -- Expect now either ']' to end things, or a ',' to allow us to continue.
+      --
+      local c = text:sub(i,i)
+      if c == ']' then
+         return VALUE, i + 1
+      end
+      if text:sub(i, i) ~= ',' then
+         self:onDecodeError("expected comma or '['", text, i, etc)
+      end
+      i = skip_whitespace(text, i + 1)
+   end
+   self:onDecodeError("unclosed '['", text, start, etc)
+end
+
+
+grok_one = function(self, text, start, etc)
+   -- Skip any whitespace
+   start = skip_whitespace(text, start)
+
+   if start > text:len() then
+      self:onDecodeError("unexpected end of string", text, nil, etc)
+   end
+
+   if text:find('^"', start) then
+      return grok_string(self, text, start, etc)
+
+   elseif text:find('^[-0123456789 ]', start) then
+      return grok_number(self, text, start, etc)
+
+   elseif text:find('^%{', start) then
+      return grok_object(self, text, start, etc)
+
+   elseif text:find('^%[', start) then
+      return grok_array(self, text, start, etc)
+
+   elseif text:find('^true', start) then
+      return true, start + 4
+
+   elseif text:find('^false', start) then
+      return false, start + 5
+
+   elseif text:find('^null', start) then
+      return nil, start + 4
+
+   else
+      self:onDecodeError("can't parse JSON", text, start, etc)
+   end
+end
+
+function OBJDEF:decode(text, etc)
+   if type(self) ~= 'table' or self.__index ~= OBJDEF then
+      OBJDEF:onDecodeError("JSON:decode must be called in method format", nil, nil, etc)
+   end
+
+   if text == nil then
+      self:onDecodeOfNilError(string.format("nil passed to JSON:decode()"), nil, nil, etc)
+   elseif type(text) ~= 'string' then
+      self:onDecodeError(string.format("expected string argument to JSON:decode(), got %s", type(text)), nil, nil, etc)
+   end
+
+   if text:match('^%s*$') then
+      return nil
+   end
+
+   if text:match('^%s*<') then
+      -- Can't be JSON... we'll assume it's HTML
+      self:onDecodeOfHTMLError(string.format("html passed to JSON:decode()"), text, nil, etc)
+   end
+
+   --
+   -- Ensure that it's not UTF-32 or UTF-16.
+   -- Those are perfectly valid encodings for JSON (as per RFC 4627 section 3),
+   -- but this package can't handle them.
+   --
+   if text:sub(1,1):byte() == 0 or (text:len() >= 2 and text:sub(2,2):byte() == 0) then
+      self:onDecodeError("JSON package groks only UTF-8, sorry", text, nil, etc)
+   end
+
+   local success, value = pcall(grok_one, self, text, 1, etc)
+   if success then
+      return value
+   else
+      -- should never get here... JSON parse errors should have been caught earlier
+      assert(false, value)
+      return nil
+   end
+end
+
+local function backslash_replacement_function(c)
+   if c == "\n" then
+      return "\\n"
+   elseif c == "\r" then
+      return "\\r"
+   elseif c == "\t" then
+      return "\\t"
+   elseif c == "\b" then
+      return "\\b"
+   elseif c == "\f" then
+      return "\\f"
+   elseif c == '"' then
+      return '\\"'
+   elseif c == '\\' then
+      return '\\\\'
+   else
+      return string.format("\\u%04x", c:byte())
+   end
+end
+
+local chars_to_be_escaped_in_JSON_string
+   = '['
+   ..    '"'    -- class sub-pattern to match a double quote
+   ..    '%\\'  -- class sub-pattern to match a backslash
+   ..    '%z'   -- class sub-pattern to match a null
+   ..    '\001' .. '-' .. '\031' -- class sub-pattern to match control characters
+   .. ']'
+
+local function json_string_literal(value)
+   local newval = value:gsub(chars_to_be_escaped_in_JSON_string, backslash_replacement_function)
+   return '"' .. newval .. '"'
+end
+
+local function object_or_array(self, T, etc)
+   --
+   -- We need to inspect all the keys... if there are any strings, we'll convert to a JSON
+   -- object. If there are only numbers, it's a JSON array.
+   --
+   -- If we'll be converting to a JSON object, we'll want to sort the keys so that the
+   -- end result is deterministic.
+   --
+   local string_keys = { }
+   local seen_number_key = false
+   local maximum_number_key
+
+   for key in pairs(T) do
+      if type(key) == 'number' then
+         seen_number_key = true
+         if not maximum_number_key or maximum_number_key < key then
+            maximum_number_key = key
+         end
+      elseif type(key) == 'string' then
+         table.insert(string_keys, key)
+      else
+         self:onEncodeError("can't encode table with a key of type " .. type(key), etc)
+      end
+   end
+
+   if seen_number_key and #string_keys > 0 then
+      --
+      -- Mixed key types... don't know what to do, so bail
+      --
+      self:onEncodeError("a table with both numeric and string keys could be an object or array; aborting", etc)
+
+   elseif #string_keys == 0  then
+      --
+      -- An array
+      --
+      if seen_number_key then
+         return nil, maximum_number_key -- an array
+      else
+         --
+         -- An empty table...
+         --
+         if tostring(T) == "JSON array" then
+            return nil
+         elseif tostring(T) == "JSON object" then
+            return { }
+         else
+            -- have to guess, so we'll pick array, since empty arrays are likely more common than empty objects
+            return nil
+         end
+      end
+   else
+      --
+      -- An object, so return a list of keys
+      --
+      table.sort(string_keys)
+      return string_keys
+   end
+end
+
+--
+-- Encode
+--
+local encode_value -- must predeclare because it calls itself
+function encode_value(self, value, parents, etc)
+
+
+   if value == nil then
+      return 'null'
+   end
+
+   if type(value) == 'string' then
+      return json_string_literal(value)
+   elseif type(value) == 'number' then
+      if value ~= value then
+         --
+         -- NaN (Not a Number).
+         -- JSON has no NaN, so we have to fudge the best we can. This should really be a package option.
+         --
+         return "null"
+      elseif value >= math.huge then
+         --
+         -- Positive infinity. JSON has no INF, so we have to fudge the best we can. This should
+         -- really be a package option. Note: at least with some implementations, positive infinity
+         -- is both ">= math.huge" and "<= -math.huge", which makes no sense but that's how it is.
+         -- Negative infinity is properly "<= -math.huge". So, we must be sure to check the ">="
+         -- case first.
+         --
+         return "1e+9999"
+      elseif value <= -math.huge then
+         --
+         -- Negative infinity.
+         -- JSON has no INF, so we have to fudge the best we can. This should really be a package option.
+         --
+         return "-1e+9999"
+      else
+         return tostring(value)
+      end
+   elseif type(value) == 'boolean' then
+      return tostring(value)
+
+   elseif type(value) ~= 'table' then
+      self:onEncodeError("can't convert " .. type(value) .. " to JSON", etc)
+
+   else
+      --
+      -- A table to be converted to either a JSON object or array.
+      --
+      local T = value
+
+      if parents[T] then
+         self:onEncodeError("table " .. tostring(T) .. " is a child of itself", etc)
+      else
+         parents[T] = true
+      end
+
+      local result_value
+
+      local object_keys, maximum_number_key = object_or_array(self, T, etc)
+      if maximum_number_key then
+         --
+         -- An array...
+         --
+         local ITEMS = { }
+         for i = 1, maximum_number_key do
+            table.insert(ITEMS, encode_value(self, T[i], parents, etc))
+         end
+
+         result_value = "[" .. table.concat(ITEMS, ",") .. "]"
+      elseif object_keys then
+         --
+         -- An object
+         --
+
+         --
+         -- We'll always sort the keys, so that comparisons can be made on
+         -- the results, etc. The actual order is not particularly
+         -- important (e.g. it doesn't matter what character set we sort
+         -- as); it's only important that it be deterministic... the same
+         -- every time.
+         --
+         local PARTS = { }
+         for _, key in ipairs(object_keys) do
+            local encoded_key = encode_value(self, tostring(key), parents, etc)
+            local encoded_val = encode_value(self, T[key],        parents, etc)
+            table.insert(PARTS, string.format("%s:%s", encoded_key, encoded_val))
+         end
+         result_value = "{" .. table.concat(PARTS, ",") .. "}"
+      else
+         --
+         -- An empty array/object... we'll treat it as an array, though it should really be an option
+         --
+         result_value = "[]"
+      end
+
+      parents[T] = false
+      return result_value
+   end
+end
+
+local encode_pretty_value -- must predeclare because it calls itself
+function encode_pretty_value(self, value, parents, indent, etc)
+
+   if type(value) == 'string' then
+      return json_string_literal(value)
+
+   elseif type(value) == 'number' then
+      return tostring(value)
+
+   elseif type(value) == 'boolean' then
+      return tostring(value)
+
+   elseif type(value) == 'nil' then
+      return 'null'
+
+   elseif type(value) ~= 'table' then
+      self:onEncodeError("can't convert " .. type(value) .. " to JSON", etc)
+
+   else
+      --
+      -- A table to be converted to either a JSON object or array.
+      --
+      local T = value
+
+      if parents[T] then
+         self:onEncodeError("table " .. tostring(T) .. " is a child of itself", etc)
+      end
+      parents[T] = true
+
+      local result_value
+
+      local object_keys = object_or_array(self, T, etc)
+      if not object_keys then
+         --
+         -- An array...
+         --
+         local ITEMS = { }
+         for i = 1, #T do
+            table.insert(ITEMS, encode_pretty_value(self, T[i], parents, indent, etc))
+         end
+
+         result_value = "[ " .. table.concat(ITEMS, ", ") .. " ]"
+
+      else
+
+         --
+         -- An object -- can keys be numbers?
+         --
+
+         local KEYS = { }
+         local max_key_length = 0
+         for _, key in ipairs(object_keys) do
+            local encoded = encode_pretty_value(self, tostring(key), parents, "", etc)
+            max_key_length = math.max(max_key_length, #encoded)
+            table.insert(KEYS, encoded)
+         end
+         local key_indent = indent .. "    "
+         local subtable_indent = indent .. string.rep(" ", max_key_length + 2 + 4)
+         local FORMAT = "%s%" .. tostring(max_key_length) .. "s: %s"
+
+         local COMBINED_PARTS = { }
+         for i, key in ipairs(object_keys) do
+            local encoded_val = encode_pretty_value(self, T[key], parents, subtable_indent, etc)
+            table.insert(COMBINED_PARTS, string.format(FORMAT, key_indent, KEYS[i], encoded_val))
+         end
+         result_value = "{\n" .. table.concat(COMBINED_PARTS, ",\n") .. "\n" .. indent .. "}"
+      end
+
+      parents[T] = false
+      return result_value
+   end
+end
+
+function OBJDEF:encode(value, etc)
+   if type(self) ~= 'table' or self.__index ~= OBJDEF then
+      OBJDEF:onEncodeError("JSON:encode must be called in method format", etc)
+   end
+
+   local parents = {}
+   return encode_value(self, value, parents, etc)
+end
+
+function OBJDEF:encode_pretty(value, etc)
+   local parents = {}
+   local subtable_indent = ""
+   return encode_pretty_value(self, value, parents, subtable_indent, etc)
+end
+
+function OBJDEF.__tostring()
+   return "JSON encode/decode package"
+end
+
+OBJDEF.__index = OBJDEF
+
+function OBJDEF:new(args)
+   local new = { }
+
+   if args then
+      for key, val in pairs(args) do
+         new[key] = val
+      end
+   end
+
+   return setmetatable(new, OBJDEF)
+end
+
+return OBJDEF:new()
+
+--
+-- Version history:
+--
+--   20130120.6    Comment update: added a link to the specific page on my blog where this code can
+--                 be found, so that folks who come across the code outside of my blog can find updates
+--                 more easily.
+--
+--   20111207.5    Added support for the 'etc' arguments, for better error reporting.
+--
+--   20110731.4    More feedback from David Kolf on how to make the tests for Nan/Infinity system independent.
+--
+--   20110730.3    Incorporated feedback from David Kolf at http://lua-users.org/wiki/JsonModules:
+--
+--                   * When encoding lua for JSON, Sparse numeric arrays are now handled by
+--                     spitting out full arrays, such that
+--                        JSON:encode({"one", "two", [10] = "ten"})
+--                     returns
+--                        ["one","two",null,null,null,null,null,null,null,"ten"]
+--
+--                     In 20100810.2 and earlier, only up to the first non-null value would have been retained.
+--
+--                   * When encoding lua for JSON, numeric value NaN gets spit out as null, and infinity as "1+e9999".
+--                     Version 20100810.2 and earlier created invalid JSON in both cases.
+--
+--                   * Unicode surrogate pairs are now detected when decoding JSON.
+--
+--   20100810.2    added some checking to ensure that an invalid Unicode character couldn't leak in to the UTF-8 encoding
+--
+--   20100731.1    initial public release
+--

lua-libs/bit.lua

@@ -0,0 +1,260 @@
+--[[---------------
+LuaBit v0.4
+-------------------
+a bitwise operation lib for lua.
+
+http://luaforge.net/projects/bit/
+
+How to use:
+-------------------
+ bit.bnot(n) -- bitwise not (~n)
+ bit.band(m, n) -- bitwise and (m & n)
+ bit.bor(m, n) -- bitwise or (m | n)
+ bit.bxor(m, n) -- bitwise xor (m ^ n)
+ bit.brshift(n, bits) -- right shift (n >> bits)
+ bit.blshift(n, bits) -- left shift (n << bits)
+ bit.blogic_rshift(n, bits) -- logic right shift(zero fill >>>)
+ 
+Please note that bit.brshift and bit.blshift only support number within
+32 bits.
+
+2 utility functions are provided too:
+ bit.tobits(n) -- convert n into a bit table(which is a 1/0 sequence)
+               -- high bits first
+ bit.tonumb(bit_tbl) -- convert a bit table into a number 
+-------------------
+
+Under the MIT license.
+
+copyright(c) 2006~2007 hanzhao (abrash_han@hotmail.com)
+--]]---------------
+
+do
+
+------------------------
+-- bit lib implementions
+
+local function check_int(n)
+ -- checking not float
+ if(n - math.floor(n) > 0) then
+  error("trying to use bitwise operation on non-integer!")
+ end
+end
+
+local function to_bits(n)
+ check_int(n)
+ if(n < 0) then
+  -- negative
+  return to_bits(bit.bnot(math.abs(n)) + 1)
+ end
+ -- to bits table
+ local tbl = {}
+ local cnt = 1
+ while (n > 0) do
+  local last = math.mod(n,2)
+  if(last == 1) then
+   tbl[cnt] = 1
+  else
+   tbl[cnt] = 0
+  end
+  n = (n-last)/2
+  cnt = cnt + 1
+ end
+
+ return tbl
+end
+
+local function tbl_to_number(tbl)
+ local n = table.getn(tbl)
+
+ local rslt = 0
+ local power = 1
+ for i = 1, n do
+  rslt = rslt + tbl[i]*power
+  power = power*2
+ end
+ 
+ return rslt
+end
+
+local function expand(tbl_m, tbl_n)
+ local big = {}
+ local small = {}
+ if(table.getn(tbl_m) > table.getn(tbl_n)) then
+  big = tbl_m
+  small = tbl_n
+ else
+  big = tbl_n
+  small = tbl_m
+ end
+ -- expand small
+ for i = table.getn(small) + 1, table.getn(big) do
+  small[i] = 0
+ end
+
+end
+
+local function bit_or(m, n)
+ local tbl_m = to_bits(m)
+ local tbl_n = to_bits(n)
+ expand(tbl_m, tbl_n)
+
+ local tbl = {}
+ local rslt = math.max(table.getn(tbl_m), table.getn(tbl_n))
+ for i = 1, rslt do
+  if(tbl_m[i]== 0 and tbl_n[i] == 0) then
+   tbl[i] = 0
+  else
+   tbl[i] = 1
+  end
+ end
+ 
+ return tbl_to_number(tbl)
+end
+
+local function bit_and(m, n)
+ local tbl_m = to_bits(m)
+ local tbl_n = to_bits(n)
+ expand(tbl_m, tbl_n) 
+
+ local tbl = {}
+ local rslt = math.max(table.getn(tbl_m), table.getn(tbl_n))
+ for i = 1, rslt do
+  if(tbl_m[i]== 0 or tbl_n[i] == 0) then
+   tbl[i] = 0
+  else
+   tbl[i] = 1
+  end
+ end
+
+ return tbl_to_number(tbl)
+end
+
+local function bit_not(n)
+ 
+ local tbl = to_bits(n)
+ local size = math.max(table.getn(tbl), 32)
+ for i = 1, size do
+  if(tbl[i] == 1) then 
+   tbl[i] = 0
+  else
+   tbl[i] = 1
+  end
+ end
+ return tbl_to_number(tbl)
+end
+
+local function bit_xor(m, n)
+ local tbl_m = to_bits(m)
+ local tbl_n = to_bits(n)
+ expand(tbl_m, tbl_n) 
+
+ local tbl = {}
+ local rslt = math.max(table.getn(tbl_m), table.getn(tbl_n))
+ for i = 1, rslt do
+  if(tbl_m[i] ~= tbl_n[i]) then
+   tbl[i] = 1
+  else
+   tbl[i] = 0
+  end
+ end
+ 
+ --table.foreach(tbl, print)
+
+ return tbl_to_number(tbl)
+end
+
+local function bit_rshift(n, bits)
+ check_int(n)
+ 
+ local high_bit = 0
+ if(n < 0) then
+  -- negative
+  n = bit_not(math.abs(n)) + 1
+  high_bit = 2147483648 -- 0x80000000
+ end
+
+ for i=1, bits do
+  n = n/2
+  n = bit_or(math.floor(n), high_bit)
+ end
+ return math.floor(n)
+end
+
+-- logic rightshift assures zero filling shift
+local function bit_logic_rshift(n, bits)
+ check_int(n)
+ if(n < 0) then
+  -- negative
+  n = bit_not(math.abs(n)) + 1
+ end
+ for i=1, bits do
+  n = n/2
+ end
+ return math.floor(n)
+end
+
+local function bit_lshift(n, bits)
+ check_int(n)
+ 
+ if(n < 0) then
+  -- negative
+  n = bit_not(math.abs(n)) + 1
+ end
+
+ for i=1, bits do
+  n = n*2
+ end
+ return bit_and(n, 4294967295) -- 0xFFFFFFFF
+end
+
+local function bit_xor2(m, n)
+ local rhs = bit_or(bit_not(m), bit_not(n))
+ local lhs = bit_or(m, n)
+ local rslt = bit_and(lhs, rhs)
+ return rslt
+end
+
+--------------------
+-- bit lib interface
+
+bit = {
+ -- bit operations
+ bnot = bit_not,
+ band = bit_and,
+ bor  = bit_or,
+ bxor = bit_xor,
+ brshift = bit_rshift,
+ blshift = bit_lshift,
+ bxor2 = bit_xor2,
+ blogic_rshift = bit_logic_rshift,
+
+ -- utility func
+ tobits = to_bits,
+ tonumb = tbl_to_number,
+}
+
+end
+
+--[[
+for i = 1, 100 do
+ for j = 1, 100 do
+  if(bit.bxor(i, j) ~= bit.bxor2(i, j)) then
+   error("bit.xor failed.")
+  end
+ end
+end
+--]]
+
+
+
+
+
+
+
+
+
+
+
+
+