模組:EncoderUtil
 | 此模块被引用於約669,000個頁面。 為了避免造成大規模的影響，所有對此模块的編輯應先於沙盒或測試樣例上測試。 測試後無誤的版本可以一次性地加入此模块中，但是修改前請務必於討論頁發起討論。 模板引用數量會自動更新。 |
使用方法
JSON
編碼
- 本模組._jsonEncode
能將Lua編碼為JSON的函數。與mw.text.jsonEncode不同在於，mw.text.jsonEncode遇到函數物件會出錯，而本模組的_jsonEncode會將函數物件以替代符號表示而不會出錯，能正常轉換各種Lua物件。
不支援模板直接呼叫。
解碼
JSON解碼僅需要使用mw.text.jsonDecode即可，本模組無特別提供。
YAML
解碼
- 本模組.yamlDecode
| 原始碼 | 輸出 |
|---|---|
{{#invoke:EncoderUtil|yamlDecode|
---
receipt: Oz-Ware Purchase Invoice
date: 2012-08-06
customer:
given: Dorothy
family: Gale}}
|
{
["customer"] = {
["family"] = "Gale",
["given"] = "Dorothy"
},
["date"] = 1344182400,
["receipt"] = "Oz-Ware Purchase Invoice"
}
|
- 本模組.yaml2json
將YAML轉換為JSON。支援模板直接呼叫。
| 原始碼 | 輸出 |
|---|---|
{{#invoke:EncoderUtil|yaml2json|
---
receipt: Oz-Ware Purchase Invoice
date: 2012-08-06
customer:
given: Dorothy
family: Gale}}
|
{"customer":{"given":"Dorothy","family":"Gale"},"date":1344182400,"receipt":"Oz-Ware Purchase Invoice"}
|
二进制資料流
本函數的功能並非設計給數字進行进制轉換之用，而是資料流的編解碼。若需要將數字進行进制轉換，請參考Module:BaseConvert或Module:BigNumber提供的convertBase函數。
編碼
- 本模組._toBinary(x,digits)
能將一整數轉換成指定位數的二進制資料串。（供QR碼資料串編碼使用）
不支援模板直接呼叫。
- 本模組._binaryEncode(str)
能將一字串以UTF-8的格式編碼為二進制資料串。
有支援模板直接呼叫的函數binaryEncode
- 原始碼
{{#invoke:EncoderUtil|binaryEncode|維基百科}}- 輸出→111001111011011010101101111001011001111110111010111001111001100110111110111001111010011110010001
- 本模組._hexadecimalEncode(str)
有支援模板直接呼叫的函數hexadecimalEncode
- 原始碼
{{#invoke:EncoderUtil|hexadecimalEncode|維基百科，自由的百科全書}}- 輸出→e7b6ade59fbae799bee7a791efbc8ce887aae794b1e79a84e799bee7a791e585a8e69bb8
解碼
- 本模組._binaryDecode(bin)
一個二進制資料串解碼為UTF-8格式編碼的字串。
有支援模板直接呼叫的函數binaryDecode
- 原始碼
{{#invoke:EncoderUtil|binaryDecode|111001111011011010101101111001011001111110111010111001111001100110111110111001111010011110010001}}- 輸出→維基百科
- 本模組._hexadecimalDecode(hex)
有支援模板直接呼叫的函數hexadecimalDecode
- 原始碼
{{#invoke:EncoderUtil|hexadecimalDecode|e7b6ade59fbae799bee7a791efbc8ce887aae794b1e79a84e799bee7a791e585a8e69bb8}}- 輸出→維基百科，自由的百科全書
QR碼
- 本模組._get_libqrcode()
初始化QR碼編碼程式庫。此處所有函數皆不支援模板直接呼叫。若要讓模板直接呼叫，請改用Module:QR和Module:RegularTiling提供的API（相依於本模組）。
初始化完的程式庫有以下成員：
- license：記錄函式庫三句版BSD授權條款的詳細資料。
- encode_string_numeric：將純數字字串編碼為QR碼格式的二进制資料流。
- encode_string_ascii：將純ASCII字串編碼為QR碼格式的二进制資料流。
- encode_string_binary：將UTF-8字串編碼為QR碼格式的二进制資料流。
- encode_data：根據QR碼編碼模式將輸入的資料編碼為QR碼格式的二进制資料流。
- qrcode：生成完整QR碼二維碼的二进制資料流。
- get_mode：判斷輸入字串適合的QR碼編碼模式。
- get_length：將資料長度資訊編碼為QR碼格式的二进制資料流。
- add_pad_data：生成QR碼的padding bits。
- get_generator_polynominal_adjusted：
- get_pixel_with_mask：取得QR碼特定位置的掩模。
- get_version_eclevel_mode_bistringlength：
- get_version_eclevel：
- remainder：各Ver的QR碼編碼時需要補餘的位元數量。
- arrange_codewords_and_calculate_ec：
- calculate_error_correction：計算糾錯碼
- convert_bitstring_to_bytes：將長度為的二进制字串轉換為長度為的數字陣列。
- get_matrix_and_penalty：
- get_matrix_with_lowest_penalty：
- bit_xor：
Base64
- 本模組._get_libbase64()
初始化Base64編碼程式庫。此處所有函數皆不支援模板直接呼叫。
初始化完的程式庫有以下成員：
- encode( str, encoder, usecaching )：將字串以指定編碼器編碼為Base64。
- decode( b64, decoder, usecaching )：將Base64資料流以指定解碼器進行解碼。
- makeencoder( s62, s63, spad )：以給定的62、63字元和指定的spad生成編碼器。
- makedecoder( s62, s63, spad )：以給定的62、63字元和指定的spad生成解碼器。
編碼
- 本模組.base64Encode(str)
將字串編碼為標準的Base64資料流。支援模板直接呼叫。
- 原始碼
{{#invoke:EncoderUtil|base64Encode|維基百科，自由的百科全書}}- 輸出→57at5Z+655m+56eR77yM6Ieq55Sx55qE55m+56eR5YWo5pu4
解碼
- 本模組.base64Decode(b64)
將給定的Base64資料流依照標準的Base64格式進行解碼。支援模板直接呼叫。
- 原始碼
{{#invoke:EncoderUtil|base64Decode|57at5Z+655m+56eR77yM6Ieq55Sx55qE55m+56eR5YWo5pu4}}- 輸出→維基百科，自由的百科全書
| 上述文档嵌入自Module:EncoderUtil/doc。 (编辑 | 历史) 编者可以在本模块的沙盒 (创建 | 镜像)和测试样例 (创建)页面进行实验。 本模块的子页面。 |
local p={}
local lib_arg={}
local yaml = require("Module:EncoderUtil/yaml")
local function _safejson_number(obj, flat_out)
if type(obj) == type(0) then
if not not tostring(obj):lower():find('inf') then return tostring(obj) end
if not not tostring(obj):lower():find('nan') then return flat_out and tostring(obj) or '\127null\127'end
return flat_out and tostring(obj) or obj
else
return obj
end
end
local q={}
function q._safejson_clone(obj, deep)
if type(obj) == type({'table'}) then
local new_table = {}
for key,val in pairs(obj) do
if type(val) == type({'table'}) then
if deep < 10 then
new_table[key] = q._safejson_clone(val, deep + 1)
else
if xpcall(function()new_table[key] = mw.text.jsonDecode(mw.text.jsonEncode(val))end,function()end) then else new_table[key] = key end
end
elseif type(val) == type(function()end) then new_table[key] = key
elseif type(val) == type(nil) then
elseif type(val) == type(0) then new_table[key] = _safejson_number(val)
else new_table[key] = mw.clone(val) end
end
return new_table
else
return obj
end
end
local function _check_table(obj)
if type(obj) == type({'table'}) then
local new_table = {}
for key,val in pairs(obj) do
if type(val) == type({'table'}) then new_table[key] = q._safejson_clone(val,0)
elseif type(val) == type(function()end) then new_table[key] = key
elseif type(val) == type(nil) then new_table[key] = '\127null\127'
elseif type(val) == type(0) then new_table[key] = _safejson_number(val)
else new_table[key] = mw.clone(val) end
end
return new_table
else
return obj
end
end
local function _jsonEncode(obj)
local result = ''
if type(obj) == type({'table'}) then
result = mw.text.jsonEncode(_check_table(obj))
elseif type(obj) == type(function()end) then result = 'function'
elseif type(obj) == type(nil) then result = 'null'
elseif type(obj) == type(0) then
local can_encode = false
can_encode,result = xpcall(function()return mw.text.jsonEncode(obj)end,function()end)
if can_encode==false then result=_safejson_number(obj,true)end
else result = mw.text.jsonEncode(obj) end
return result
end
function p.yamlDecode(str)
local input_str = str
if type(str) == type({"table"}) then
input_str = (str.args or {})[1] or str[1] or ''
elseif type(str) ~= type("string") then
input_str = tostring(str)
end
local result = yaml.eval(input_str)
if str == mw.getCurrentFrame() or type(str.getParent)==type(function()end) then
return yaml.to_string(result) or ''
end
return result
end
function p.yaml2json(str)
local input_str = str
if type(str) == type({"table"}) then
input_str = (str.args or {})[1] or str[1] or ''
elseif type(str) ~= type("string") then
input_str = tostring(str)
end
local result = yaml.eval(input_str)
return _jsonEncode(result)
end
function p._get_string_length( str )
if type(str)==type("str")and str~='' then
return #str
elseif type(str)==type(nil)or str=='' then return 0
elseif type(str)==type(0) then return #(''..str)
else return #str
end
return 0
end
-- Return the binary representation of the number x with the width of `digits`.
function p._toBinary(x,digits)
local s=string.format("%o",x)
local a={["0"]="000",["1"]="001", ["2"]="010",["3"]="011",
["4"]="100",["5"]="101", ["6"]="110",["7"]="111"}
s=string.gsub(s,"(.)",function (d) return a[d] end)
-- remove leading 0s
s = string.gsub(s,"^0*(.*)$","%1")
local fmtstring = string.format("%%%ds",digits)
local ret = string.format(fmtstring,s)
return string.gsub(ret," ","0")
end
function p._binaryEncode(str)
local s = tostring(str)
local bin = ''
for i=1,s:len() do bin = bin .. p._toBinary(s:byte(i, i), 8) end
return bin
end
function p._hexadecimalEncode(str)
local s = tostring(str)
local hex = ''
for i=1,s:len() do hex = hex .. ("%%%ds"):format(2):format(("%x"):format(s:byte(i, i))):gsub(' ','0')end
return hex
end
function p._binaryDecode(str)
local s, result = tostring(str), ''
local s_len = s:len()
local lose = s_len % 8
if lose > 0 then lose = 8 - lose end
s_len = (s_len + lose) / 8
s = ('0'):rep(lose)..s
for i=0,s_len-1 do result = result .. string.char(tonumber(s:sub(i*8+1, i*8+8),2)) end
return result
end
function p._hexadecimalDecode(str)
local s, result = tostring(str), ''
local s_len = s:len()
local lose = s_len % 2
if lose > 0 then lose = 2 - lose end
s_len = (s_len + lose) / 2
s = ('0'):rep(lose)..s
for i=0,s_len-1 do result = result .. string.char(tonumber(s:sub(i*2+1, i*2+2),16)) end
return result
end
function p.binaryEncode(str)
local input_str = str
if type(str) == type({"table"}) then
input_str = (str.args or {})[1] or str[1] or ''
elseif type(str) ~= type("string") then
input_str = tostring(str)
end
return p._binaryEncode(input_str)
end
function p.hexadecimalEncode(str)
local input_str = str
if type(str) == type({"table"}) then
input_str = (str.args or {})[1] or str[1] or ''
elseif type(str) ~= type("string") then
input_str = tostring(str)
end
return p._hexadecimalEncode(input_str)
end
function p.binaryDecode(str)
local input_str = str
if type(str) == type({"table"}) then
input_str = (str.args or {})[1] or str[1] or ''
elseif type(str) ~= type("string") then
input_str = tostring(str)
end
return p._binaryDecode(input_str)
end
function p.hexadecimalDecode(str)
local input_str = str
if type(str) == type({"table"}) then
input_str = (str.args or {})[1] or str[1] or ''
elseif type(str) ~= type("string") then
input_str = tostring(str)
end
return p._hexadecimalDecode(input_str)
end
function p._get_bytes( str,... )
if #{...}<1 then return 0 end
local result={}
if type(str)==type("str")and str~='' then
return str:byte(...)
elseif type(str)==type(nil)or type(str)==type(0)or str=='' then
for i=1,#{...}do result[#result+1]=0 end
elseif #{...}>2 or #{...}==1 then
for key,value in pairs{...}do result[#result+1]=str[tonumber(value)or-1] end
else
local start,end_=unpack{...}
for i=start,end_,(end_>=start and 1 or-1)do result[#result+1]=str[i] end
end
for i=1,#result do
result[i] = (tonumber(result[i])or 0)%256
end
if #result > 0 then return unpack(result) end
return 0
end
local function init_qrcode_library()
local license =[[
The qrcode library is licensed under the 3-clause BSD license (aka "new BSD")
Copyright (c) 2012-2020, Patrick Gundlach and contributors, see https://github.com/speedata/luaqrcode , All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of the <organization> nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
]]
-- To calculate xor we need to do that bitwise. This helper table speeds up the num-to-bit
-- part a bit (no pun intended)
local cclxvi = {[0] = {0,0,0,0,0,0,0,0}, {1,0,0,0,0,0,0,0}, {0,1,0,0,0,0,0,0}, {1,1,0,0,0,0,0,0},
{0,0,1,0,0,0,0,0}, {1,0,1,0,0,0,0,0}, {0,1,1,0,0,0,0,0}, {1,1,1,0,0,0,0,0},
{0,0,0,1,0,0,0,0}, {1,0,0,1,0,0,0,0}, {0,1,0,1,0,0,0,0}, {1,1,0,1,0,0,0,0},
{0,0,1,1,0,0,0,0}, {1,0,1,1,0,0,0,0}, {0,1,1,1,0,0,0,0}, {1,1,1,1,0,0,0,0},
{0,0,0,0,1,0,0,0}, {1,0,0,0,1,0,0,0}, {0,1,0,0,1,0,0,0}, {1,1,0,0,1,0,0,0},
{0,0,1,0,1,0,0,0}, {1,0,1,0,1,0,0,0}, {0,1,1,0,1,0,0,0}, {1,1,1,0,1,0,0,0},
{0,0,0,1,1,0,0,0}, {1,0,0,1,1,0,0,0}, {0,1,0,1,1,0,0,0}, {1,1,0,1,1,0,0,0},
{0,0,1,1,1,0,0,0}, {1,0,1,1,1,0,0,0}, {0,1,1,1,1,0,0,0}, {1,1,1,1,1,0,0,0},
{0,0,0,0,0,1,0,0}, {1,0,0,0,0,1,0,0}, {0,1,0,0,0,1,0,0}, {1,1,0,0,0,1,0,0},
{0,0,1,0,0,1,0,0}, {1,0,1,0,0,1,0,0}, {0,1,1,0,0,1,0,0}, {1,1,1,0,0,1,0,0},
{0,0,0,1,0,1,0,0}, {1,0,0,1,0,1,0,0}, {0,1,0,1,0,1,0,0}, {1,1,0,1,0,1,0,0},
{0,0,1,1,0,1,0,0}, {1,0,1,1,0,1,0,0}, {0,1,1,1,0,1,0,0}, {1,1,1,1,0,1,0,0},
{0,0,0,0,1,1,0,0}, {1,0,0,0,1,1,0,0}, {0,1,0,0,1,1,0,0}, {1,1,0,0,1,1,0,0},
{0,0,1,0,1,1,0,0}, {1,0,1,0,1,1,0,0}, {0,1,1,0,1,1,0,0}, {1,1,1,0,1,1,0,0},
{0,0,0,1,1,1,0,0}, {1,0,0,1,1,1,0,0}, {0,1,0,1,1,1,0,0}, {1,1,0,1,1,1,0,0},
{0,0,1,1,1,1,0,0}, {1,0,1,1,1,1,0,0}, {0,1,1,1,1,1,0,0}, {1,1,1,1,1,1,0,0},
{0,0,0,0,0,0,1,0}, {1,0,0,0,0,0,1,0}, {0,1,0,0,0,0,1,0}, {1,1,0,0,0,0,1,0},
{0,0,1,0,0,0,1,0}, {1,0,1,0,0,0,1,0}, {0,1,1,0,0,0,1,0}, {1,1,1,0,0,0,1,0},
{0,0,0,1,0,0,1,0}, {1,0,0,1,0,0,1,0}, {0,1,0,1,0,0,1,0}, {1,1,0,1,0,0,1,0},
{0,0,1,1,0,0,1,0}, {1,0,1,1,0,0,1,0}, {0,1,1,1,0,0,1,0}, {1,1,1,1,0,0,1,0},
{0,0,0,0,1,0,1,0}, {1,0,0,0,1,0,1,0}, {0,1,0,0,1,0,1,0}, {1,1,0,0,1,0,1,0},
{0,0,1,0,1,0,1,0}, {1,0,1,0,1,0,1,0}, {0,1,1,0,1,0,1,0}, {1,1,1,0,1,0,1,0},
{0,0,0,1,1,0,1,0}, {1,0,0,1,1,0,1,0}, {0,1,0,1,1,0,1,0}, {1,1,0,1,1,0,1,0},
{0,0,1,1,1,0,1,0}, {1,0,1,1,1,0,1,0}, {0,1,1,1,1,0,1,0}, {1,1,1,1,1,0,1,0},
{0,0,0,0,0,1,1,0}, {1,0,0,0,0,1,1,0}, {0,1,0,0,0,1,1,0}, {1,1,0,0,0,1,1,0},
{0,0,1,0,0,1,1,0}, {1,0,1,0,0,1,1,0}, {0,1,1,0,0,1,1,0}, {1,1,1,0,0,1,1,0},
{0,0,0,1,0,1,1,0}, {1,0,0,1,0,1,1,0}, {0,1,0,1,0,1,1,0}, {1,1,0,1,0,1,1,0},
{0,0,1,1,0,1,1,0}, {1,0,1,1,0,1,1,0}, {0,1,1,1,0,1,1,0}, {1,1,1,1,0,1,1,0},
{0,0,0,0,1,1,1,0}, {1,0,0,0,1,1,1,0}, {0,1,0,0,1,1,1,0}, {1,1,0,0,1,1,1,0},
{0,0,1,0,1,1,1,0}, {1,0,1,0,1,1,1,0}, {0,1,1,0,1,1,1,0}, {1,1,1,0,1,1,1,0},
{0,0,0,1,1,1,1,0}, {1,0,0,1,1,1,1,0}, {0,1,0,1,1,1,1,0}, {1,1,0,1,1,1,1,0},
{0,0,1,1,1,1,1,0}, {1,0,1,1,1,1,1,0}, {0,1,1,1,1,1,1,0}, {1,1,1,1,1,1,1,0},
{0,0,0,0,0,0,0,1}, {1,0,0,0,0,0,0,1}, {0,1,0,0,0,0,0,1}, {1,1,0,0,0,0,0,1},
{0,0,1,0,0,0,0,1}, {1,0,1,0,0,0,0,1}, {0,1,1,0,0,0,0,1}, {1,1,1,0,0,0,0,1},
{0,0,0,1,0,0,0,1}, {1,0,0,1,0,0,0,1}, {0,1,0,1,0,0,0,1}, {1,1,0,1,0,0,0,1},
{0,0,1,1,0,0,0,1}, {1,0,1,1,0,0,0,1}, {0,1,1,1,0,0,0,1}, {1,1,1,1,0,0,0,1},
{0,0,0,0,1,0,0,1}, {1,0,0,0,1,0,0,1}, {0,1,0,0,1,0,0,1}, {1,1,0,0,1,0,0,1},
{0,0,1,0,1,0,0,1}, {1,0,1,0,1,0,0,1}, {0,1,1,0,1,0,0,1}, {1,1,1,0,1,0,0,1},
{0,0,0,1,1,0,0,1}, {1,0,0,1,1,0,0,1}, {0,1,0,1,1,0,0,1}, {1,1,0,1,1,0,0,1},
{0,0,1,1,1,0,0,1}, {1,0,1,1,1,0,0,1}, {0,1,1,1,1,0,0,1}, {1,1,1,1,1,0,0,1},
{0,0,0,0,0,1,0,1}, {1,0,0,0,0,1,0,1}, {0,1,0,0,0,1,0,1}, {1,1,0,0,0,1,0,1},
{0,0,1,0,0,1,0,1}, {1,0,1,0,0,1,0,1}, {0,1,1,0,0,1,0,1}, {1,1,1,0,0,1,0,1},
{0,0,0,1,0,1,0,1}, {1,0,0,1,0,1,0,1}, {0,1,0,1,0,1,0,1}, {1,1,0,1,0,1,0,1},
{0,0,1,1,0,1,0,1}, {1,0,1,1,0,1,0,1}, {0,1,1,1,0,1,0,1}, {1,1,1,1,0,1,0,1},
{0,0,0,0,1,1,0,1}, {1,0,0,0,1,1,0,1}, {0,1,0,0,1,1,0,1}, {1,1,0,0,1,1,0,1},
{0,0,1,0,1,1,0,1}, {1,0,1,0,1,1,0,1}, {0,1,1,0,1,1,0,1}, {1,1,1,0,1,1,0,1},
{0,0,0,1,1,1,0,1}, {1,0,0,1,1,1,0,1}, {0,1,0,1,1,1,0,1}, {1,1,0,1,1,1,0,1},
{0,0,1,1,1,1,0,1}, {1,0,1,1,1,1,0,1}, {0,1,1,1,1,1,0,1}, {1,1,1,1,1,1,0,1},
{0,0,0,0,0,0,1,1}, {1,0,0,0,0,0,1,1}, {0,1,0,0,0,0,1,1}, {1,1,0,0,0,0,1,1},
{0,0,1,0,0,0,1,1}, {1,0,1,0,0,0,1,1}, {0,1,1,0,0,0,1,1}, {1,1,1,0,0,0,1,1},
{0,0,0,1,0,0,1,1}, {1,0,0,1,0,0,1,1}, {0,1,0,1,0,0,1,1}, {1,1,0,1,0,0,1,1},
{0,0,1,1,0,0,1,1}, {1,0,1,1,0,0,1,1}, {0,1,1,1,0,0,1,1}, {1,1,1,1,0,0,1,1},
{0,0,0,0,1,0,1,1}, {1,0,0,0,1,0,1,1}, {0,1,0,0,1,0,1,1}, {1,1,0,0,1,0,1,1},
{0,0,1,0,1,0,1,1}, {1,0,1,0,1,0,1,1}, {0,1,1,0,1,0,1,1}, {1,1,1,0,1,0,1,1},
{0,0,0,1,1,0,1,1}, {1,0,0,1,1,0,1,1}, {0,1,0,1,1,0,1,1}, {1,1,0,1,1,0,1,1},
{0,0,1,1,1,0,1,1}, {1,0,1,1,1,0,1,1}, {0,1,1,1,1,0,1,1}, {1,1,1,1,1,0,1,1},
{0,0,0,0,0,1,1,1}, {1,0,0,0,0,1,1,1}, {0,1,0,0,0,1,1,1}, {1,1,0,0,0,1,1,1},
{0,0,1,0,0,1,1,1}, {1,0,1,0,0,1,1,1}, {0,1,1,0,0,1,1,1}, {1,1,1,0,0,1,1,1},
{0,0,0,1,0,1,1,1}, {1,0,0,1,0,1,1,1}, {0,1,0,1,0,1,1,1}, {1,1,0,1,0,1,1,1},
{0,0,1,1,0,1,1,1}, {1,0,1,1,0,1,1,1}, {0,1,1,1,0,1,1,1}, {1,1,1,1,0,1,1,1},
{0,0,0,0,1,1,1,1}, {1,0,0,0,1,1,1,1}, {0,1,0,0,1,1,1,1}, {1,1,0,0,1,1,1,1},
{0,0,1,0,1,1,1,1}, {1,0,1,0,1,1,1,1}, {0,1,1,0,1,1,1,1}, {1,1,1,0,1,1,1,1},
{0,0,0,1,1,1,1,1}, {1,0,0,1,1,1,1,1}, {0,1,0,1,1,1,1,1}, {1,1,0,1,1,1,1,1},
{0,0,1,1,1,1,1,1}, {1,0,1,1,1,1,1,1}, {0,1,1,1,1,1,1,1}, {1,1,1,1,1,1,1,1}}
-- Return a number that is the result of interpreting the table tbl (msb first)
local function tbl_to_number(tbl)
local n, rslt, power = #tbl, 0, 1
for i = 1, n do
rslt = rslt + tbl[i]*power
power = power*2
end
return rslt
end
-- Calculate bitwise xor of bytes m and n. 0 <= m,n <= 256.
local function bit_xor(m, n)
local tbl_m = cclxvi[m]
local tbl_n = cclxvi[n]
local tbl = {}
for i = 1, 8 do
if(tbl_m[i] ~= tbl_n[i]) then
tbl[i] = 1
else
tbl[i] = 0
end
end
return tbl_to_number(tbl)
end
local fill_matrix_position = function(matrix,bitstring,x,y) matrix[x][y] = (bitstring == "1") and 2 or -2 end
-- Return the mode for the given string `str`.
-- See table 2 of the spec. We only support mode 1, 2 and 4.
-- That is: numeric, alaphnumeric and binary.
local function get_mode( str )
local mode
if type(str)==type("str")and str~='' then
if string.match(str,"^[0-9]+$") then
return 1
elseif string.match(str,"^[0-9A-Z $%%*./:+-]+$") then
return 2
else
return 4
end
elseif type(str)==type(nil)or str=='' then return 4
elseif type(str)==type(0) then return 1
else return 4
end
assert(false,"never reached")
return nil
end
-- The capacity (number of codewords) of each version (1-40) for error correction levels 1-4 (LMQH).
-- The higher the ec level, the lower the capacity of the version. Taken from spec, tables 7-11.
local capacity = {
{ 19, 16, 13, 9},{ 34, 28, 22, 16},{ 55, 44, 34, 26},{ 80, 64, 48, 36},
{ 108, 86, 62, 46},{ 136, 108, 76, 60},{ 156, 124, 88, 66},{ 194, 154, 110, 86},
{ 232, 182, 132, 100},{ 274, 216, 154, 122},{ 324, 254, 180, 140},{ 370, 290, 206, 158},
{ 428, 334, 244, 180},{ 461, 365, 261, 197},{ 523, 415, 295, 223},{ 589, 453, 325, 253},
{ 647, 507, 367, 283},{ 721, 563, 397, 313},{ 795, 627, 445, 341},{ 861, 669, 485, 385},
{ 932, 714, 512, 406},{1006, 782, 568, 442},{1094, 860, 614, 464},{1174, 914, 664, 514},
{1276, 1000, 718, 538},{1370, 1062, 754, 596},{1468, 1128, 808, 628},{1531, 1193, 871, 661},
{1631, 1267, 911, 701},{1735, 1373, 985, 745},{1843, 1455, 1033, 793},{1955, 1541, 1115, 845},
{2071, 1631, 1171, 901},{2191, 1725, 1231, 961},{2306, 1812, 1286, 986},{2434, 1914, 1354, 1054},
{2566, 1992, 1426, 1096},{2702, 2102, 1502, 1142},{2812, 2216, 1582, 1222},{2956, 2334, 1666, 1276}}
-- mode = 1,2,4,8
local function get_version_eclevel(len,mode,requested_ec_level)
local local_mode = mode
if mode == 4 then
local_mode = 3
elseif mode == 8 then
local_mode = 4
end
assert( local_mode <= 4 )
local bytes, bits, digits, modebits, c
local tab = { {10,9,8,8},{12,11,16,10},{14,13,16,12} }
local minversion = 40
local maxec_level = requested_ec_level or 1
local min,max = 1, 4
if requested_ec_level and requested_ec_level >= 1 and requested_ec_level <= 4 then
min = requested_ec_level
max = requested_ec_level
end
for ec_level=min,max do
for version=1,#capacity do
bits = capacity[version][ec_level] * 8
bits = bits - 4 -- the mode indicator
if version < 10 then
digits = tab[1][local_mode]
elseif version < 27 then
digits = tab[2][local_mode]
elseif version <= 40 then
digits = tab[3][local_mode]
end
modebits = bits - digits
if local_mode == 1 then -- numeric
c = math.floor(modebits * 3 / 10)
elseif local_mode == 2 then -- alphanumeric
c = math.floor(modebits * 2 / 11)
elseif local_mode == 3 then -- binary
c = math.floor(modebits * 1 / 8)
else
c = math.floor(modebits * 1 / 13)
end
if c >= len then
if version <= minversion then
minversion = version
maxec_level = ec_level
end
break
end
end
end
return minversion, maxec_level
end
-- Return a bit string of 0s and 1s that includes the length of the code string.
-- The modes are numeric = 1, alphanumeric = 2, binary = 4, and japanese = 8
local function get_length(str,version,mode)
local i = mode
if mode == 4 then
i = 3
elseif mode == 8 then
i = 4
end
assert( i <= 4 )
local tab = { {10,9,8,8},{12,11,16,10},{14,13,16,12} }
local digits
if version < 10 then
digits = tab[1][i]
elseif version < 27 then
digits = tab[2][i]
elseif version <= 40 then
digits = tab[3][i]
else
assert(false, "get_length, version > 40 not supported")
end
local len = p._toBinary(p._get_string_length(str),digits)
return len
end
local function get_version_eclevel_mode_bistringlength(str,requested_ec_level,mode)
local local_mode
if mode then
assert(false,"not implemented")
-- check if the mode is OK for the string
local_mode = mode
else
local_mode = get_mode(str)
end
local version, ec_level
version, ec_level = get_version_eclevel(p._get_string_length(str),local_mode,requested_ec_level)
local length_string = get_length(str,version,local_mode)
return version,ec_level,p._toBinary((type(str)==type(nil))and 0 or local_mode,4),local_mode,length_string
end
local asciitbl = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -- 0x01-0x0f
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -- 0x10-0x1f
36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, -- 0x20-0x2f
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1, -- 0x30-0x3f
-1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, -- 0x40-0x4f
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -- 0x50-0x5f
}
-- Return a binary representation of the numeric string `str`. This must contain only digits 0-9.
local function encode_string_numeric(str)
local bitstring = ""
local int
string.gsub(str,"..?.?",function(a)
int = tonumber(a)
if #a == 3 then
bitstring = bitstring .. p._toBinary(int,10)
elseif #a == 2 then
bitstring = bitstring .. p._toBinary(int,7)
else
bitstring = bitstring .. p._toBinary(int,4)
end
end)
return bitstring
end
-- Return a binary representation of the alphanumeric string `str`. This must contain only
-- digits 0-9, uppercase letters A-Z, space and the following chars: $%*./:+-.
local function encode_string_ascii(str)
local bitstring = ""
local int
local b1, b2
string.gsub(str,"..?",function(a)
if #a == 2 then
b1 = asciitbl[string.byte(string.sub(a,1,1))]
b2 = asciitbl[string.byte(string.sub(a,2,2))]
int = b1 * 45 + b2
bitstring = bitstring .. p._toBinary(int,11)
else
int = asciitbl[string.byte(a)]
bitstring = bitstring .. p._toBinary(int,6)
end
end)
return bitstring
end
-- Return a bitstring representing string str in binary mode.
-- We don't handle UTF-8 in any special way because we assume the
-- scanner recognizes UTF-8 and displays it correctly.
local function encode_string_binary(str)
local ret = {}
if type(str)==type("str")and str~='' then
string.gsub(str,".",function(x)
ret[#ret + 1] = p._toBinary(string.byte(x),8)
end)
elseif type(str)==type(nil)or str==''then
return ''
else
for it=1,#str do
assert((type(str[it])==type('0'))or(type(str[it])==type(0)),"data not support")
local bytedata = tonumber(str[it])or 0
assert(bytedata<=255 and bytedata>=0,"data overflow")
bytedata=bytedata%255
ret[#ret + 1] = p._toBinary(bytedata,8)
end
end
return table.concat(ret)
end
-- Return a bitstring representing string str in the given mode.
local function encode_data(str,mode)
if mode == 1 then
return encode_string_numeric(str)
elseif mode == 2 then
return encode_string_ascii(str)
elseif mode == 4 then
return encode_string_binary(str)
else
assert(false,"not implemented yet")
end
end
-- Encoding the codeword is not enough. We need to make sure that
-- the length of the binary string is equal to the number of codewords of the version.
local function add_pad_data(version,ec_level,data)
local count_to_pad, missing_digits
local cpty = capacity[version][ec_level] * 8
count_to_pad = math.min(4,cpty - #data)
if count_to_pad > 0 then
data = data .. string.rep("0",count_to_pad)
end
if math.fmod(#data,8) ~= 0 then
missing_digits = 8 - math.fmod(#data,8)
data = data .. string.rep("0",missing_digits)
end
assert(math.fmod(#data,8) == 0)
-- add "11101100" and "00010001" until enough data
while #data < cpty do
data = data .. "11101100"
if #data < cpty then
data = data .. "00010001"
end
end
return data
end
-- https://codyplanteen.com/assets/rs/gf256_log_antilog.pdf
local alpha_int = {
[0] = 1,
2, 4, 8, 16, 32, 64, 128, 29, 58, 116, 232, 205, 135, 19, 38, 76,
152, 45, 90, 180, 117, 234, 201, 143, 3, 6, 12, 24, 48, 96, 192, 157,
39, 78, 156, 37, 74, 148, 53, 106, 212, 181, 119, 238, 193, 159, 35, 70,
140, 5, 10, 20, 40, 80, 160, 93, 186, 105, 210, 185, 111, 222, 161, 95,
190, 97, 194, 153, 47, 94, 188, 101, 202, 137, 15, 30, 60, 120, 240, 253,
231, 211, 187, 107, 214, 177, 127, 254, 225, 223, 163, 91, 182, 113, 226, 217,
175, 67, 134, 17, 34, 68, 136, 13, 26, 52, 104, 208, 189, 103, 206, 129,
31, 62, 124, 248, 237, 199, 147, 59, 118, 236, 197, 151, 51, 102, 204, 133,
23, 46, 92, 184, 109, 218, 169, 79, 158, 33, 66, 132, 21, 42, 84, 168,
77, 154, 41, 82, 164, 85, 170, 73, 146, 57, 114, 228, 213, 183, 115, 230,
209, 191, 99, 198, 145, 63, 126, 252, 229, 215, 179, 123, 246, 241, 255, 227,
219, 171, 75, 150, 49, 98, 196, 149, 55, 110, 220, 165, 87, 174, 65, 130,
25, 50, 100, 200, 141, 7, 14, 28, 56, 112, 224, 221, 167, 83, 166, 81,
162, 89, 178, 121, 242, 249, 239, 195, 155, 43, 86, 172, 69, 138, 9, 18,
36, 72, 144, 61, 122, 244, 245, 247, 243, 251, 235, 203, 139, 11, 22, 44,
88, 176, 125, 250, 233, 207, 131, 27, 54, 108, 216, 173, 71, 142, 0, 0
}
local int_alpha = {
[0] = 256, -- special value
0, 1, 25, 2, 50, 26, 198, 3, 223, 51, 238, 27, 104, 199, 75, 4,
100, 224, 14, 52, 141, 239, 129, 28, 193, 105, 248, 200, 8, 76, 113, 5,
138, 101, 47, 225, 36, 15, 33, 53, 147, 142, 218, 240, 18, 130, 69, 29,
181, 194, 125, 106, 39, 249, 185, 201, 154, 9, 120, 77, 228, 114, 166, 6,
191, 139, 98, 102, 221, 48, 253, 226, 152, 37, 179, 16, 145, 34, 136, 54,
208, 148, 206, 143, 150, 219, 189, 241, 210, 19, 92, 131, 56, 70, 64, 30,
66, 182, 163, 195, 72, 126, 110, 107, 58, 40, 84, 250, 133, 186, 61, 202,
94, 155, 159, 10, 21, 121, 43, 78, 212, 229, 172, 115, 243, 167, 87, 7,
112, 192, 247, 140, 128, 99, 13, 103, 74, 222, 237, 49, 197, 254, 24, 227,
165, 153, 119, 38, 184, 180, 124, 17, 68, 146, 217, 35, 32, 137, 46, 55,
63, 209, 91, 149, 188, 207, 205, 144, 135, 151, 178, 220, 252, 190, 97, 242,
86, 211, 171, 20, 42, 93, 158, 132, 60, 57, 83, 71, 109, 65, 162, 31,
45, 67, 216, 183, 123, 164, 118, 196, 23, 73, 236, 127, 12, 111, 246, 108,
161, 59, 82, 41, 157, 85, 170, 251, 96, 134, 177, 187, 204, 62, 90, 203,
89, 95, 176, 156, 169, 160, 81, 11, 245, 22, 235, 122, 117, 44, 215, 79,
174, 213, 233, 230, 231, 173, 232, 116, 214, 244, 234, 168, 80, 88, 175
}
-- We only need the polynomial generators for block sizes 7, 10, 13, 15, 16, 17, 18, 20, 22, 24, 26, 28, and 30. Version
-- 2 of the qr codes don't need larger ones (as opposed to version 1). The table has the format x^1*ɑ^21 + x^2*a^102 ...
local generator_polynomial = {
[7] = { 21, 102, 238, 149, 146, 229, 87, 0},
[10] = { 45, 32, 94, 64, 70, 118, 61, 46, 67, 251, 0 },
[13] = { 78, 140, 206, 218, 130, 104, 106, 100, 86, 100, 176, 152, 74, 0 },
[15] = {105, 99, 5, 124, 140, 237, 58, 58, 51, 37, 202, 91, 61, 183, 8, 0},
[16] = {120, 225, 194, 182, 169, 147, 191, 91, 3, 76, 161, 102, 109, 107, 104, 120, 0},
[17] = {136, 163, 243, 39, 150, 99, 24, 147, 214, 206, 123, 239, 43, 78, 206, 139, 43, 0},
[18] = {153, 96, 98, 5, 179, 252, 148, 152, 187, 79, 170, 118, 97, 184, 94, 158, 234, 215, 0},
[20] = {190, 188, 212, 212, 164, 156, 239, 83, 225, 221, 180, 202, 187, 26, 163, 61, 50, 79, 60, 17, 0},
[22] = {231, 165, 105, 160, 134, 219, 80, 98, 172, 8, 74, 200, 53, 221, 109, 14, 230, 93, 242, 247, 171, 210, 0},
[24] = { 21, 227, 96, 87, 232, 117, 0, 111, 218, 228, 226, 192, 152, 169, 180, 159, 126, 251, 117, 211, 48, 135, 121, 229, 0},
[26] = { 70, 218, 145, 153, 227, 48, 102, 13, 142, 245, 21, 161, 53, 165, 28, 111, 201, 145, 17, 118, 182, 103, 2, 158, 125, 173, 0},
[28] = {123, 9, 37, 242, 119, 212, 195, 42, 87, 245, 43, 21, 201, 232, 27, 205, 147, 195, 190, 110, 180, 108, 234, 224, 104, 200, 223, 168, 0},
[30] = {180, 192, 40, 238, 216, 251, 37, 156, 130, 224, 193, 226, 173, 42, 125, 222, 96, 239, 86, 110, 48, 50, 182, 179, 31, 216, 152, 145, 173, 41, 0}}
-- Turn a binary string of length 8*x into a table size x of numbers.
local function convert_bitstring_to_bytes(data)
local msg = {}
local tab = string.gsub(data,"(........)",function(x)
msg[#msg+1] = tonumber(x,2)
end)
return msg
end
-- Return a table that has 0's in the first entries and then the alpha
-- representation of the generator polynominal
local function get_generator_polynominal_adjusted(num_ec_codewords,highest_exponent)
local gp_alpha = {[0]=0}
for i=0,highest_exponent - num_ec_codewords - 1 do
gp_alpha[i] = 0
end
local gp = generator_polynomial[num_ec_codewords]
for i=1,num_ec_codewords + 1 do
gp_alpha[highest_exponent - num_ec_codewords + i - 1] = gp[i]
end
return gp_alpha
end
-- Convert polynominal in int notation to alpha notation.
local function convert_to_alpha( tab )
local new_tab = {}
for i=0,#tab do
new_tab[i] = int_alpha[tab[i]]
end
return new_tab
end
-- Convert polynominal in alpha notation to int notation.
local function convert_to_int(tab,len_message)
local new_tab = {}
for i=0,#tab do
new_tab[i] = alpha_int[tab[i]]
end
return new_tab
end
-- That's the heart of the error correction calculation.
local function calculate_error_correction(data,num_ec_codewords)
local mp
if type(data)=="string" then
mp = convert_bitstring_to_bytes(data)
elseif type(data)=="table" then
mp = data
else
assert(false,"Unknown type for data: %s",type(data))
end
local len_message = #mp
local highest_exponent = len_message + num_ec_codewords - 1
local gp_alpha,tmp
local he
local gp_int = {}
local mp_int,mp_alpha = {},{}
-- create message shifted to left (highest exponent)
for i=1,len_message do
mp_int[highest_exponent - i + 1] = mp[i]
end
for i=1,highest_exponent - len_message do
mp_int[i] = 0
end
mp_int[0] = 0
mp_alpha = convert_to_alpha(mp_int)
while highest_exponent >= num_ec_codewords do
gp_alpha = get_generator_polynominal_adjusted(num_ec_codewords,highest_exponent)
-- Multiply generator polynomial by first coefficient of the above polynomial
-- take the highest exponent from the message polynom (alpha) and add
-- it to the generator polynom
local exp = mp_alpha[highest_exponent]
for i=highest_exponent,highest_exponent - num_ec_codewords,-1 do
if exp ~= 256 then
if gp_alpha[i] + exp >= 255 then
gp_alpha[i] = math.fmod(gp_alpha[i] + exp,255)
else
gp_alpha[i] = gp_alpha[i] + exp
end
else
gp_alpha[i] = 256
end
end
for i=highest_exponent - num_ec_codewords - 1,0,-1 do
gp_alpha[i] = 256
end
gp_int = convert_to_int(gp_alpha)
mp_int = convert_to_int(mp_alpha)
tmp = {}
for i=highest_exponent,0,-1 do
tmp[i] = bit_xor(gp_int[i],mp_int[i])
end
-- remove leading 0's
he = highest_exponent
for i=he,0,-1 do
-- We need to stop if the length of the codeword is matched
if i < num_ec_codewords then break end
if tmp[i] == 0 then
tmp[i] = nil
highest_exponent = highest_exponent - 1
else
break
end
end
mp_int = tmp
mp_alpha = convert_to_alpha(mp_int)
end
local ret = {}
-- reverse data
for i=#mp_int,0,-1 do
ret[#ret + 1] = mp_int[i]
end
return ret
end
local ecblocks = {
{{ 1,{ 26, 19, 2} }, { 1,{26,16, 4}}, { 1,{26,13, 6}}, { 1, {26, 9, 8} }},
{{ 1,{ 44, 34, 4} }, { 1,{44,28, 8}}, { 1,{44,22,11}}, { 1, {44,16,14} }},
{{ 1,{ 70, 55, 7} }, { 1,{70,44,13}}, { 2,{35,17, 9}}, { 2, {35,13,11} }},
{{ 1,{100, 80,10} }, { 2,{50,32, 9}}, { 2,{50,24,13}}, { 4, {25, 9, 8} }},
{{ 1,{134,108,13} }, { 2,{67,43,12}}, { 2,{33,15, 9}, 2,{34,16, 9}}, { 2, {33,11,11}, 2,{34,12,11}}},
{{ 2,{ 86, 68, 9} }, { 4,{43,27, 8}}, { 4,{43,19,12}}, { 4, {43,15,14} }},
{{ 2,{ 98, 78,10} }, { 4,{49,31, 9}}, { 2,{32,14, 9}, 4,{33,15, 9}}, { 4, {39,13,13}, 1,{40,14,13}}},
{{ 2,{121, 97,12} }, { 2,{60,38,11}, 2,{61,39,11}}, { 4,{40,18,11}, 2,{41,19,11}}, { 4, {40,14,13}, 2,{41,15,13}}},
{{ 2,{146,116,15} }, { 3,{58,36,11}, 2,{59,37,11}}, { 4,{36,16,10}, 4,{37,17,10}}, { 4, {36,12,12}, 4,{37,13,12}}},
{{ 2,{ 86, 68, 9}, 2,{ 87, 69, 9}}, { 4,{69,43,13}, 1,{70,44,13}}, { 6,{43,19,12}, 2,{44,20,12}}, { 6, {43,15,14}, 2,{44,16,14}}},
{{ 4,{101, 81,10} }, { 1,{80,50,15}, 4,{81,51,15}}, { 4,{50,22,14}, 4,{51,23,14}}, { 3, {36,12,12}, 8,{37,13,12}}},
{{ 2,{116, 92,12}, 2,{117, 93,12}}, { 6,{58,36,11}, 2,{59,37,11}}, { 4,{46,20,13}, 6,{47,21,13}}, { 7, {42,14,14}, 4,{43,15,14}}},
{{ 4,{133,107,13} }, { 8,{59,37,11}, 1,{60,38,11}}, { 8,{44,20,12}, 4,{45,21,12}}, { 12, {33,11,11}, 4,{34,12,11}}},
{{ 3,{145,115,15}, 1,{146,116,15}}, { 4,{64,40,12}, 5,{65,41,12}}, { 11,{36,16,10}, 5,{37,17,10}}, { 11, {36,12,12}, 5,{37,13,12}}},
{{ 5,{109, 87,11}, 1,{110, 88,11}}, { 5,{65,41,12}, 5,{66,42,12}}, { 5,{54,24,15}, 7,{55,25,15}}, { 11, {36,12,12}, 7,{37,13,12}}},
{{ 5,{122, 98,12}, 1,{123, 99,12}}, { 7,{73,45,14}, 3,{74,46,14}}, { 15,{43,19,12}, 2,{44,20,12}}, { 3, {45,15,15}, 13,{46,16,15}}},
{{ 1,{135,107,14}, 5,{136,108,14}}, { 10,{74,46,14}, 1,{75,47,14}}, { 1,{50,22,14}, 15,{51,23,14}}, { 2, {42,14,14}, 17,{43,15,14}}},
{{ 5,{150,120,15}, 1,{151,121,15}}, { 9,{69,43,13}, 4,{70,44,13}}, { 17,{50,22,14}, 1,{51,23,14}}, { 2, {42,14,14}, 19,{43,15,14}}},
{{ 3,{141,113,14}, 4,{142,114,14}}, { 3,{70,44,13}, 11,{71,45,13}}, { 17,{47,21,13}, 4,{48,22,13}}, { 9, {39,13,13}, 16,{40,14,13}}},
{{ 3,{135,107,14}, 5,{136,108,14}}, { 3,{67,41,13}, 13,{68,42,13}}, { 15,{54,24,15}, 5,{55,25,15}}, { 15, {43,15,14}, 10,{44,16,14}}},
{{ 4,{144,116,14}, 4,{145,117,14}}, { 17,{68,42,13}}, { 17,{50,22,14}, 6,{51,23,14}}, { 19, {46,16,15}, 6,{47,17,15}}},
{{ 2,{139,111,14}, 7,{140,112,14}}, { 17,{74,46,14}}, { 7,{54,24,15}, 16,{55,25,15}}, { 34, {37,13,12} }},
{{ 4,{151,121,15}, 5,{152,122,15}}, { 4,{75,47,14}, 14,{76,48,14}}, { 11,{54,24,15}, 14,{55,25,15}}, { 16, {45,15,15}, 14,{46,16,15}}},
{{ 6,{147,117,15}, 4,{148,118,15}}, { 6,{73,45,14}, 14,{74,46,14}}, { 11,{54,24,15}, 16,{55,25,15}}, { 30, {46,16,15}, 2,{47,17,15}}},
{{ 8,{132,106,13}, 4,{133,107,13}}, { 8,{75,47,14}, 13,{76,48,14}}, { 7,{54,24,15}, 22,{55,25,15}}, { 22, {45,15,15}, 13,{46,16,15}}},
{{ 10,{142,114,14}, 2,{143,115,14}}, { 19,{74,46,14}, 4,{75,47,14}}, { 28,{50,22,14}, 6,{51,23,14}}, { 33, {46,16,15}, 4,{47,17,15}}},
{{ 8,{152,122,15}, 4,{153,123,15}}, { 22,{73,45,14}, 3,{74,46,14}}, { 8,{53,23,15}, 26,{54,24,15}}, { 12, {45,15,15}, 28,{46,16,15}}},
{{ 3,{147,117,15}, 10,{148,118,15}}, { 3,{73,45,14}, 23,{74,46,14}}, { 4,{54,24,15}, 31,{55,25,15}}, { 11, {45,15,15}, 31,{46,16,15}}},
{{ 7,{146,116,15}, 7,{147,117,15}}, { 21,{73,45,14}, 7,{74,46,14}}, { 1,{53,23,15}, 37,{54,24,15}}, { 19, {45,15,15}, 26,{46,16,15}}},
{{ 5,{145,115,15}, 10,{146,116,15}}, { 19,{75,47,14}, 10,{76,48,14}}, { 15,{54,24,15}, 25,{55,25,15}}, { 23, {45,15,15}, 25,{46,16,15}}},
{{ 13,{145,115,15}, 3,{146,116,15}}, { 2,{74,46,14}, 29,{75,47,14}}, { 42,{54,24,15}, 1,{55,25,15}}, { 23, {45,15,15}, 28,{46,16,15}}},
{{ 17,{145,115,15} }, { 10,{74,46,14}, 23,{75,47,14}}, { 10,{54,24,15}, 35,{55,25,15}}, { 19, {45,15,15}, 35,{46,16,15}}},
{{ 17,{145,115,15}, 1,{146,116,15}}, { 14,{74,46,14}, 21,{75,47,14}}, { 29,{54,24,15}, 19,{55,25,15}}, { 11, {45,15,15}, 46,{46,16,15}}},
{{ 13,{145,115,15}, 6,{146,116,15}}, { 14,{74,46,14}, 23,{75,47,14}}, { 44,{54,24,15}, 7,{55,25,15}}, { 59, {46,16,15}, 1,{47,17,15}}},
{{ 12,{151,121,15}, 7,{152,122,15}}, { 12,{75,47,14}, 26,{76,48,14}}, { 39,{54,24,15}, 14,{55,25,15}}, { 22, {45,15,15}, 41,{46,16,15}}},
{{ 6,{151,121,15}, 14,{152,122,15}}, { 6,{75,47,14}, 34,{76,48,14}}, { 46,{54,24,15}, 10,{55,25,15}}, { 2, {45,15,15}, 64,{46,16,15}}},
{{ 17,{152,122,15}, 4,{153,123,15}}, { 29,{74,46,14}, 14,{75,47,14}}, { 49,{54,24,15}, 10,{55,25,15}}, { 24, {45,15,15}, 46,{46,16,15}}},
{{ 4,{152,122,15}, 18,{153,123,15}}, { 13,{74,46,14}, 32,{75,47,14}}, { 48,{54,24,15}, 14,{55,25,15}}, { 42, {45,15,15}, 32,{46,16,15}}},
{{ 20,{147,117,15}, 4,{148,118,15}}, { 40,{75,47,14}, 7,{76,48,14}}, { 43,{54,24,15}, 22,{55,25,15}}, { 10, {45,15,15}, 67,{46,16,15}}},
{{ 19,{148,118,15}, 6,{149,119,15}}, { 18,{75,47,14}, 31,{76,48,14}}, { 34,{54,24,15}, 34,{55,25,15}}, { 20, {45,15,15}, 61,{46,16,15}}}
}
-- The bits that must be 0 if the version does fill the complete matrix.
-- Example: for version 1, no bits need to be added after arranging the data, for version 2 we need to add 7 bits at the end.
local remainder = {0, 7, 7, 7, 7, 7, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0}
-- This is the formula for table 1 in the spec:
-- function get_capacity_remainder( version )
-- local len = version * 4 + 17
-- local size = len^2
-- local function_pattern_modules = 192 + 2 * len - 32 -- Position Adjustment pattern + timing pattern
-- local count_alignemnt_pattern = #alignment_pattern[version]
-- if count_alignemnt_pattern > 0 then
-- -- add 25 for each aligment pattern
-- function_pattern_modules = function_pattern_modules + 25 * ( count_alignemnt_pattern^2 - 3 )
-- -- but substract the timing pattern occupied by the aligment pattern on the top and left
-- function_pattern_modules = function_pattern_modules - ( count_alignemnt_pattern - 2) * 10
-- end
-- size = size - function_pattern_modules
-- if version > 6 then
-- size = size - 67
-- else
-- size = size - 31
-- end
-- return math.floor(size/8),math.fmod(size,8)
-- end
-- The given data can be a string of 0's and 1' (with #string mod 8 == 0).
-- Alternatively the data can be a table of codewords. The number of codewords
-- must match the capacity of the qr code.
local function arrange_codewords_and_calculate_ec( version,ec_level,data )
if type(data)=="table" then
local tmp = ""
for i=1,#data do
tmp = tmp .. p._toBinary(data[i],8)
end
data = tmp
end
-- If the size of the data is not enough for the codeword, we add 0's and two special bytes until finished.
local blocks = ecblocks[version][ec_level]
local size_datablock_bytes, size_ecblock_bytes
local datablocks = {}
local ecblocks = {}
local count = 1
local pos = 0
local cpty_ec_bits = 0
for i=1,#blocks/2 do
for j=1,blocks[2*i - 1] do
size_datablock_bytes = blocks[2*i][2]
size_ecblock_bytes = blocks[2*i][1] - blocks[2*i][2]
cpty_ec_bits = cpty_ec_bits + size_ecblock_bytes * 8
datablocks[#datablocks + 1] = string.sub(data, pos * 8 + 1,( pos + size_datablock_bytes)*8)
tmp_tab = calculate_error_correction(datablocks[#datablocks],size_ecblock_bytes)
tmp_str = ""
for x=1,#tmp_tab do
tmp_str = tmp_str .. p._toBinary(tmp_tab[x],8)
end
ecblocks[#ecblocks + 1] = tmp_str
pos = pos + size_datablock_bytes
count = count + 1
end
end
local arranged_data = ""
pos = 1
repeat
for i=1,#datablocks do
if pos < #datablocks[i] then
arranged_data = arranged_data .. string.sub(datablocks[i],pos, pos + 7)
end
end
pos = pos + 8
until #arranged_data == #data
-- ec
local arranged_ec = ""
pos = 1
repeat
for i=1,#ecblocks do
if pos < #ecblocks[i] then
arranged_ec = arranged_ec .. string.sub(ecblocks[i],pos, pos + 7)
end
end
pos = pos + 8
until #arranged_ec == cpty_ec_bits
return arranged_data .. arranged_ec
end
local function add_position_detection_patterns(tab_x)
local size = #tab_x
-- allocate quite zone in the matrix area
for i=1,8 do
for j=1,8 do
tab_x[i][j] = -2
tab_x[size - 8 + i][j] = -2
tab_x[i][size - 8 + j] = -2
end
end
-- draw the detection pattern (outer)
for i=1,7 do
-- top left
tab_x[1][i]=2
tab_x[7][i]=2
tab_x[i][1]=2
tab_x[i][7]=2
-- top right
tab_x[size][i]=2
tab_x[size - 6][i]=2
tab_x[size - i + 1][1]=2
tab_x[size - i + 1][7]=2
-- bottom left
tab_x[1][size - i + 1]=2
tab_x[7][size - i + 1]=2
tab_x[i][size - 6]=2
tab_x[i][size]=2
end
-- draw the detection pattern (inner)
for i=1,3 do
for j=1,3 do
-- top left
tab_x[2+j][i+2]=2
-- top right
tab_x[size - j - 1][i+2]=2
-- bottom left
tab_x[2 + j][size - i - 1]=2
end
end
end
-- The timing patterns (two) are the dashed lines between two adjacent positioning patterns on row/column 7.
local function add_timing_pattern(tab_x)
local line,col
line = 7
col = 9
for i=col,#tab_x - 8 do
if math.fmod(i,2) == 1 then
tab_x[i][line] = 2
else
tab_x[i][line] = -2
end
end
for i=col,#tab_x - 8 do
if math.fmod(i,2) == 1 then
tab_x[line][i] = 2
else
tab_x[line][i] = -2
end
end
end
-- For each version, where should we place the alignment patterns? See table E.1 of the spec
local alignment_pattern = {
{},{6,18},{6,22},{6,26},{6,30},{6,34}, -- 1-6
{6,22,38},{6,24,42},{6,26,46},{6,28,50},{6,30,54},{6,32,58},{6,34,62}, -- 7-13
{6,26,46,66},{6,26,48,70},{6,26,50,74},{6,30,54,78},{6,30,56,82},{6,30,58,86},{6,34,62,90}, -- 14-20
{6,28,50,72,94},{6,26,50,74,98},{6,30,54,78,102},{6,28,54,80,106},{6,32,58,84,110},{6,30,58,86,114},{6,34,62,90,118}, -- 21-27
{6,26,50,74,98 ,122},{6,30,54,78,102,126},{6,26,52,78,104,130},{6,30,56,82,108,134},{6,34,60,86,112,138},{6,30,58,86,114,142},{6,34,62,90,118,146}, -- 28-34
{6,30,54,78,102,126,150}, {6,24,50,76,102,128,154},{6,28,54,80,106,132,158},{6,32,58,84,110,136,162},{6,26,54,82,110,138,166},{6,30,58,86,114,142,170} -- 35 - 40
}
local function add_alignment_pattern( tab_x )
local version = (#tab_x - 17) / 4
local ap = alignment_pattern[version]
local pos_x, pos_y
for x=1,#ap do
for y=1,#ap do
-- we must not put an alignment pattern on top of the positioning pattern
if not (x == 1 and y == 1 or x == #ap and y == 1 or x == 1 and y == #ap ) then
pos_x = ap[x] + 1
pos_y = ap[y] + 1
tab_x[pos_x][pos_y] = 2
tab_x[pos_x+1][pos_y] = -2
tab_x[pos_x-1][pos_y] = -2
tab_x[pos_x+2][pos_y] = 2
tab_x[pos_x-2][pos_y] = 2
tab_x[pos_x ][pos_y - 2] = 2
tab_x[pos_x+1][pos_y - 2] = 2
tab_x[pos_x-1][pos_y - 2] = 2
tab_x[pos_x+2][pos_y - 2] = 2
tab_x[pos_x-2][pos_y - 2] = 2
tab_x[pos_x ][pos_y + 2] = 2
tab_x[pos_x+1][pos_y + 2] = 2
tab_x[pos_x-1][pos_y + 2] = 2
tab_x[pos_x+2][pos_y + 2] = 2
tab_x[pos_x-2][pos_y + 2] = 2
tab_x[pos_x ][pos_y - 1] = -2
tab_x[pos_x+1][pos_y - 1] = -2
tab_x[pos_x-1][pos_y - 1] = -2
tab_x[pos_x+2][pos_y - 1] = 2
tab_x[pos_x-2][pos_y - 1] = 2
tab_x[pos_x ][pos_y + 1] = -2
tab_x[pos_x+1][pos_y + 1] = -2
tab_x[pos_x-1][pos_y + 1] = -2
tab_x[pos_x+2][pos_y + 1] = 2
tab_x[pos_x-2][pos_y + 1] = 2
end
end
end
end
local typeinfo = {
{ [-1]= "111111111111111", [0] = "111011111000100", "111001011110011", "111110110101010", "111100010011101", "110011000101111", "110001100011000", "110110001000001", "110100101110110" },
{ [-1]= "111111111111111", [0] = "101010000010010", "101000100100101", "101111001111100", "101101101001011", "100010111111001", "100000011001110", "100111110010111", "100101010100000" },
{ [-1]= "111111111111111", [0] = "011010101011111", "011000001101000", "011111100110001", "011101000000110", "010010010110100", "010000110000011", "010111011011010", "010101111101101" },
{ [-1]= "111111111111111", [0] = "001011010001001", "001001110111110", "001110011100111", "001100111010000", "000011101100010", "000001001010101", "000110100001100", "000100000111011" }
}
local function add_typeinfo_to_matrix( matrix,ec_level,mask )
local ec_mask_type = typeinfo[ec_level][mask]
local bit
-- vertical from bottom to top
for i=1,7 do
bit = string.sub(ec_mask_type,i,i)
fill_matrix_position(matrix, bit, 9, #matrix - i + 1)
end
for i=8,9 do
bit = string.sub(ec_mask_type,i,i)
fill_matrix_position(matrix,bit,9,17-i)
end
for i=10,15 do
bit = string.sub(ec_mask_type,i,i)
fill_matrix_position(matrix,bit,9,16 - i)
end
-- horizontal, left to right
for i=1,6 do
bit = string.sub(ec_mask_type,i,i)
fill_matrix_position(matrix,bit,i,9)
end
bit = string.sub(ec_mask_type,7,7)
fill_matrix_position(matrix,bit,8,9)
for i=8,15 do
bit = string.sub(ec_mask_type,i,i)
fill_matrix_position(matrix,bit,#matrix - 15 + i,9)
end
end
-- Bits for version information 7-40
-- The reversed strings from https://www.thonky.com/qr-code-tutorial/format-version-tables
local version_information = {"001010010011111000", "001111011010000100", "100110010101100100", "110010110010010100",
"011011111101110100", "010001101110001100", "111000100001101100", "101100000110011100", "000101001001111100",
"000111101101000010", "101110100010100010", "111010000101010010", "010011001010110010", "011001011001001010",
"110000010110101010", "100100110001011010", "001101111110111010", "001000110111000110", "100001111000100110",
"110101011111010110", "011100010000110110", "010110000011001110", "111111001100101110", "101011101011011110",
"000010100100111110", "101010111001000001", "000011110110100001", "010111010001010001", "111110011110110001",
"110100001101001001", "011101000010101001", "001001100101011001", "100000101010111001", "100101100011000101" }
-- Versions 7 and above need two bitfields with version information added to the code
local function add_version_information(matrix,version)
if version < 7 then return end
local size = #matrix
local bitstring = version_information[version - 6]
local x,y, bit
local start_x, start_y
-- first top right
start_x = #matrix - 10
start_y = 1
for i=1,#bitstring do
bit = string.sub(bitstring,i,i)
x = start_x + math.fmod(i - 1,3)
y = start_y + math.floor( (i - 1) / 3 )
fill_matrix_position(matrix,bit,x,y)
end
-- now bottom left
start_x = 1
start_y = #matrix - 10
for i=1,#bitstring do
bit = string.sub(bitstring,i,i)
x = start_x + math.floor( (i - 1) / 3 )
y = start_y + math.fmod(i - 1,3)
fill_matrix_position(matrix,bit,x,y)
end
end
local function prepare_matrix_with_mask( version,ec_level, mask )
local size
local tab_x = {}
size = version * 4 + 17
for i=1,size do
tab_x[i]={}
for j=1,size do
tab_x[i][j] = 0
end
end
add_position_detection_patterns(tab_x)
add_timing_pattern(tab_x)
add_version_information(tab_x,version)
-- black pixel above lower left position detection pattern
tab_x[9][size - 7] = 2
add_alignment_pattern(tab_x)
add_typeinfo_to_matrix(tab_x,ec_level, mask)
return tab_x
end
-- Return 1 (black) or -1 (blank) depending on the mask, value and position.
-- Parameter mask is 0-7 (-1 for 'no mask'). x and y are 1-based coordinates,
-- 1,1 = upper left. tonumber(value) must be 0 or 1.
local function get_pixel_with_mask( mask, x,y,value )
x = x - 1
y = y - 1
local invert = false
-- test purpose only:
if mask == -1 then
-- ignore, no masking applied
elseif mask == 0 then
if math.fmod(x + y,2) == 0 then invert = true end
elseif mask == 1 then
if math.fmod(y,2) == 0 then invert = true end
elseif mask == 2 then
if math.fmod(x,3) == 0 then invert = true end
elseif mask == 3 then
if math.fmod(x + y,3) == 0 then invert = true end
elseif mask == 4 then
if math.fmod(math.floor(y / 2) + math.floor(x / 3),2) == 0 then invert = true end
elseif mask == 5 then
if math.fmod(x * y,2) + math.fmod(x * y,3) == 0 then invert = true end
elseif mask == 6 then
if math.fmod(math.fmod(x * y,2) + math.fmod(x * y,3),2) == 0 then invert = true end
elseif mask == 7 then
if math.fmod(math.fmod(x * y,3) + math.fmod(x + y,2),2) == 0 then invert = true end
else
assert(false,"This can't happen (mask must be <= 7)")
end
if invert then
-- value = 1? -> -1, value = 0? -> 1
return 1 - 2 * tonumber(value)
else
-- value = 1? -> 1, value = 0? -> -1
return -1 + 2*tonumber(value)
end
end
-- We need up to 8 positions in the matrix. Only the last few bits may be less then 8.
-- The function returns a table of (up to) 8 entries with subtables where
-- the x coordinate is the first and the y coordinate is the second entry.
local function get_next_free_positions(matrix,x,y,dir,byte)
local ret = {}
local count = 1
local mode = "right"
while count <= #byte do
if mode == "right" and matrix[x][y] == 0 then
ret[#ret + 1] = {x,y}
mode = "left"
count = count + 1
elseif mode == "left" and matrix[x-1][y] == 0 then
ret[#ret + 1] = {x-1,y}
mode = "right"
count = count + 1
if dir == "up" then
y = y - 1
else
y = y + 1
end
elseif mode == "right" and matrix[x-1][y] == 0 then
ret[#ret + 1] = {x-1,y}
count = count + 1
if dir == "up" then
y = y - 1
else
y = y + 1
end
else
if dir == "up" then
y = y - 1
else
y = y + 1
end
end
if y < 1 or y > #matrix then
x = x - 2
-- don't overwrite the timing pattern
if x == 7 then x = 6 end
if dir == "up" then
dir = "down"
y = 1
else
dir = "up"
y = #matrix
end
end
end
return ret,x,y,dir
end
-- Add the data string (0's and 1's) to the matrix for the given mask.
local function add_data_to_matrix(matrix,data,mask)
size = #matrix
local x,y,positions
local _x,_y,m
local dir = "up"
local byte_number = 0
x,y = size,size
string.gsub(data,".?.?.?.?.?.?.?.?",function ( byte )
byte_number = byte_number + 1
positions,x,y,dir = get_next_free_positions(matrix,x,y,dir,byte,mask)
for i=1,#byte do
_x = positions[i][1]
_y = positions[i][2]
m = get_pixel_with_mask(mask,_x,_y,string.sub(byte,i,i))
if debugging then
matrix[_x][_y] = m * (i + 10)
else
matrix[_x][_y] = m
end
end
end)
end
-- Return the penalty for the given matrix
local function calculate_penalty(matrix)
local penalty1, penalty2, penalty3, penalty4 = 0,0,0,0
local size = #matrix
-- this is for penalty 4
local number_of_dark_cells = 0
-- 1: Adjacent modules in row/column in same color
-- --------------------------------------------
-- No. of modules = (5+i) -> 3 + i
local last_bit_blank -- < 0: blank, > 0: black
local is_blank
local number_of_consecutive_bits
-- first: vertical
for x=1,size do
number_of_consecutive_bits = 0
last_bit_blank = nil
for y = 1,size do
if matrix[x][y] > 0 then
-- small optimization: this is for penalty 4
number_of_dark_cells = number_of_dark_cells + 1
is_blank = false
else
is_blank = true
end
is_blank = matrix[x][y] < 0
if last_bit_blank == is_blank then
number_of_consecutive_bits = number_of_consecutive_bits + 1
else
if number_of_consecutive_bits >= 5 then
penalty1 = penalty1 + number_of_consecutive_bits - 2
end
number_of_consecutive_bits = 1
end
last_bit_blank = is_blank
end
if number_of_consecutive_bits >= 5 then
penalty1 = penalty1 + number_of_consecutive_bits - 2
end
end
-- now horizontal
for y=1,size do
number_of_consecutive_bits = 0
last_bit_blank = nil
for x = 1,size do
is_blank = matrix[x][y] < 0
if last_bit_blank == is_blank then
number_of_consecutive_bits = number_of_consecutive_bits + 1
else
if number_of_consecutive_bits >= 5 then
penalty1 = penalty1 + number_of_consecutive_bits - 2
end
number_of_consecutive_bits = 1
end
last_bit_blank = is_blank
end
if number_of_consecutive_bits >= 5 then
penalty1 = penalty1 + number_of_consecutive_bits - 2
end
end
for x=1,size do
for y=1,size do
-- 2: Block of modules in same color
-- -----------------------------------
-- Blocksize = m × n -> 3 × (m-1) × (n-1)
if (y < size - 1) and ( x < size - 1) and ( (matrix[x][y] < 0 and matrix[x+1][y] < 0 and matrix[x][y+1] < 0 and matrix[x+1][y+1] < 0) or (matrix[x][y] > 0 and matrix[x+1][y] > 0 and matrix[x][y+1] > 0 and matrix[x+1][y+1] > 0) ) then
penalty2 = penalty2 + 3
end
-- 3: 1:1:3:1:1 ratio (dark:light:dark:light:dark) pattern in row/column
-- ------------------------------------------------------------------
-- Gives 40 points each
--
-- I have no idea why we need the extra 0000 on left or right side. The spec doesn't mention it,
-- other sources do mention it. This is heavily inspired by zxing.
if (y + 6 < size and
matrix[x][y] > 0 and
matrix[x][y + 1] < 0 and
matrix[x][y + 2] > 0 and
matrix[x][y + 3] > 0 and
matrix[x][y + 4] > 0 and
matrix[x][y + 5] < 0 and
matrix[x][y + 6] > 0 and
((y + 10 < size and
matrix[x][y + 7] < 0 and
matrix[x][y + 8] < 0 and
matrix[x][y + 9] < 0 and
matrix[x][y + 10] < 0) or
(y - 4 >= 1 and
matrix[x][y - 1] < 0 and
matrix[x][y - 2] < 0 and
matrix[x][y - 3] < 0 and
matrix[x][y - 4] < 0))) then penalty3 = penalty3 + 40 end
if (x + 6 <= size and
matrix[x][y] > 0 and
matrix[x + 1][y] < 0 and
matrix[x + 2][y] > 0 and
matrix[x + 3][y] > 0 and
matrix[x + 4][y] > 0 and
matrix[x + 5][y] < 0 and
matrix[x + 6][y] > 0 and
((x + 10 <= size and
matrix[x + 7][y] < 0 and
matrix[x + 8][y] < 0 and
matrix[x + 9][y] < 0 and
matrix[x + 10][y] < 0) or
(x - 4 >= 1 and
matrix[x - 1][y] < 0 and
matrix[x - 2][y] < 0 and
matrix[x - 3][y] < 0 and
matrix[x - 4][y] < 0))) then penalty3 = penalty3 + 40 end
end
end
-- 4: Proportion of dark modules in entire symbol
-- ----------------------------------------------
-- 50 ± (5 × k)% to 50 ± (5 × (k + 1))% -> 10 × k
local dark_ratio = number_of_dark_cells / ( size * size )
penalty4 = math.floor(math.abs(dark_ratio * 100 - 50)) * 2
return penalty1 + penalty2 + penalty3 + penalty4
end
-- Create a matrix for the given parameters and calculate the penalty score.
-- Return both (matrix and penalty)
local function get_matrix_and_penalty(version,ec_level,data,mask)
local tab = prepare_matrix_with_mask(version,ec_level,mask)
add_data_to_matrix(tab,data,mask)
local penalty = calculate_penalty(tab)
return tab, penalty
end
-- Return the matrix with the smallest penalty. To to this
-- we try out the matrix for all 8 masks and determine the
-- penalty (score) each.
local function get_matrix_with_lowest_penalty(version,ec_level,data)
local tab, penalty
local tab_min_penalty, min_penalty
-- try masks 0-7
tab_min_penalty, min_penalty = get_matrix_and_penalty(version,ec_level,data,0)
for i=1,7 do
tab, penalty = get_matrix_and_penalty(version,ec_level,data,i)
if penalty < min_penalty then
tab_min_penalty = tab
min_penalty = penalty
end
end
return tab_min_penalty
end
-- If ec_level or mode is given, use the ones for generating the qrcode. (mode is not implemented yet)
local function qrcode( str, ec_level, mode, version_input )
local arranged_data, version, data_raw, mode, len_bitstring
version, ec_level, data_raw, mode, len_bitstring = get_version_eclevel_mode_bistringlength(str,ec_level)
version_in = tonumber(version_input or version)
if version_in and version_in<version then mw.addWarning('資料'..mw.dumpObject(str)..'無法置入version為'..version_in..'的QR碼中。')end
version = (version_in<40 and version_in>=version)and version_in or version
data_raw = data_raw .. len_bitstring
data_raw = data_raw .. encode_data(str,mode)
data_raw = add_pad_data(version,ec_level,data_raw)
arranged_data = arrange_codewords_and_calculate_ec(version,ec_level,data_raw)
if math.fmod(#arranged_data,8) ~= 0 then
return false, string.format("Arranged data %% 8 != 0: data length = %d, mod 8 = %d",#arranged_data, math.fmod(#arranged_data,8))
end
arranged_data = arranged_data .. string.rep("0",remainder[version])
local tab = get_matrix_with_lowest_penalty(version,ec_level,arranged_data)
return true, tab
end
return {
license = license,
encode_string_numeric = encode_string_numeric,
encode_string_ascii = encode_string_ascii,
encode_string_binary = encode_string_binary,
encode_data = encode_data,
qrcode = qrcode,
get_mode = get_mode,
get_length = get_length,
add_pad_data = add_pad_data,
get_generator_polynominal_adjusted = get_generator_polynominal_adjusted,
get_pixel_with_mask = get_pixel_with_mask,
get_version_eclevel_mode_bistringlength = get_version_eclevel_mode_bistringlength,
get_version_eclevel = get_version_eclevel,
remainder = remainder,
--get_capacity_remainder = get_capacity_remainder,
arrange_codewords_and_calculate_ec = arrange_codewords_and_calculate_ec,
calculate_error_correction = calculate_error_correction,
convert_bitstring_to_bytes = convert_bitstring_to_bytes,
get_matrix_and_penalty = get_matrix_and_penalty,
get_matrix_with_lowest_penalty=get_matrix_with_lowest_penalty,
bit_xor = bit_xor,
}
end
function p._get_libbase64()local a,b,c,d,e,f,g,h={},require('bit32').extract,'makeencoder','makedecoder',0x10000,0x40000,'[^%%w%%%s%%%s%%=]',p._get_string_length;a[c]=function(s62,s63,spad)local l={}for m,n in pairs{[0]='A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8','9',s62 or'+',s63 or'/',spad or'='}do l[m]=n:byte()end;return l end;a[d]=function(s62,s63,spad)local o={}for m,q in pairs(a[c](s62,s63,spad))do o[q]=m end;return o end;local r=a[c]()local s=a[d]()local n,t,u=string.char,table.concat,p._get_bytes;function a.encode(v,l,w)l=l or r;local x,y,z={},1,h(v)local A=z%3;local B={}for C=1,z-A,3 do local D,E,F=u(v,C,C+2)local G=D*e+E*0x100+F;local H;if w then H=B[G]if not H then H=n(l[b(G,18,6)],l[b(G,12,6)],l[b(G,6,6)],l[b(G,0,6)])B[G]=H end else H=n(l[b(G,18,6)],l[b(G,12,6)],l[b(G,6,6)],l[b(G,0,6)])end;x[y]=H;y=y+1 end;if A==2 then local D,E=u(v,z-1,z)local G=D*e+E*0x100;x[y]=n(l[b(G,18,6)],l[b(G,12,6)],l[b(G,6,6)],l[64])elseif A==1 then local G=u(v,z)*e;x[y]=n(l[b(G,18,6)],l[b(G,12,6)],l[64],l[64])end;return t(x)end;function a.decode(I,o,w,J)o=o or s;local K='[^%w%+%/%=]'if o then local i,j;for q,m in pairs(o)do if m==62 then i=q elseif m==63 then j=q end end;K=g:format(n(i),n(j))end;I=I:gsub(K,'')local B=w and{}local x,y={},1;local z=#I;local L=I:sub(-2)=='=='and 2 or I:sub(-1)=='='and 1 or 0;for C=1,L>0 and z-4 or z,4 do local D,E,F,M=I:byte(C,C+3)local H;if w then local N=D*0x1000000+E*e+F*0x100+M;H=B[N]if not H then local G=o[D]*f+o[E]*0x1000+o[F]*0x40+o[M]H=n(b(G,16,8),b(G,8,8),b(G,0,8))B[N]=H end else local G=o[D]*f+o[E]*0x1000+o[F]*0x40+o[M]H=n(b(G,16,8),b(G,8,8),b(G,0,8))end;x[y]=H;y=y+1 end;if L==1 then local D,E,F=I:byte(z-3,z-1)local G=o[D]*f+o[E]*0x1000+o[F]*0x40;x[y]=n(b(G,16,8),b(G,8,8))elseif L==2 then local D,E=I:byte(z-3,z-2)local G=o[D]*f+o[E]*0x1000;x[y]=n(b(G,16,8))end;if J==true then local O={}for C=1,#x do for P=1,#x[C]do O[#O+1]=x[C]:byte(P)end end;return O end;return t(x)end;return a end
function p.jsonEncode(obj)
local args, working_frame
if obj == mw.getCurrentFrame() then
-- We're being called via #invoke. The args are passed through to the module
-- from the template page, so use the args that were passed into the template.
if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
args = lib_arg.getArgs(obj, {
parentFirst=true,
trim = false,
removeBlanks = false
})
working_frame = obj
else
-- We're being called from another module or from the debug console, so assume
-- the args are passed in directly.
args = obj
working_frame = mw.getCurrentFrame()
if type(args) ~= type({}) then args = {obj} end
end
return _jsonEncode(args)
end
function p.jsonDecode(obj)
local args, working_frame
if obj == mw.getCurrentFrame() then
-- We're being called via #invoke. The args are passed through to the module
-- from the template page, so use the args that were passed into the template.
if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
args = lib_arg.getArgs(obj, {
parentFirst=true,
trim = false,
removeBlanks = false
})
working_frame = obj
else
-- We're being called from another module or from the debug console, so assume
-- the args are passed in directly.
args = obj
working_frame = mw.getCurrentFrame()
if type(args) ~= type({}) then args = {obj} end
end
local var = args[1] or args['1']
if type(var) ~= type({"table"}) then
if type(var) == type(nil) then return nil end
if type(var) ~= type("string") then return var end
return mw.text.jsonDecode(tostring(var))
end
return var
end
function p.jsonGet(obj)
local args, working_frame
if obj == mw.getCurrentFrame() then
-- We're being called via #invoke. The args are passed through to the module
-- from the template page, so use the args that were passed into the template.
if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
args = lib_arg.getArgs(obj, {
parentFirst=true,
trim = false,
removeBlanks = false
})
working_frame = obj
else
-- We're being called from another module or from the debug console, so assume
-- the args are passed in directly.
args = obj
working_frame = mw.getCurrentFrame()
if type(args) ~= type({}) then args = {obj} end
end
local json = p.jsonDecode(obj)
local key = args[2] or args["2"]
if type(json) == type(0) or type(json) == type(true) then return nil end
return (json or {})[key]
end
local yesno=require("Module:Yesno")
function p.base64Encode(obj)
local args, working_frame
if obj == mw.getCurrentFrame() then
-- We're being called via #invoke. The args are passed through to the module
-- from the template page, so use the args that were passed into the template.
if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
args = lib_arg.getArgs(obj, {
parentFirst=true,
trim = false,
removeBlanks = false
})
working_frame = obj
else
-- We're being called from another module or from the debug console, so assume
-- the args are passed in directly.
args = obj
working_frame = mw.getCurrentFrame()
if type(args) ~= type({}) then args = {obj} end
end
local text = args[1]or args['1'] or args.text
local bitstream = args.bitstream and mw.text.split(args.bitstream,',')
if not(text or bitstream) then return '' end
return p._get_libbase64().encode(text or bitstream)
end
function p.base64Decode(obj)
local args, working_frame
if obj == mw.getCurrentFrame() then
-- We're being called via #invoke. The args are passed through to the module
-- from the template page, so use the args that were passed into the template.
if lib_arg.getArgs == nil then lib_arg = require('Module:Arguments') end
args = lib_arg.getArgs(obj, {
parentFirst=true,
trim = false,
removeBlanks = false
})
working_frame = obj
else
-- We're being called from another module or from the debug console, so assume
-- the args are passed in directly.
args = obj
working_frame = mw.getCurrentFrame()
if type(args) ~= type({}) then args = {obj} end
end
local text = args[1]or args['1'] or args.text
local bitstream = yesno(args.bitstream or false)
local body = p._get_libbase64().decode(text,nil,nil,bitstream)
if type(body)==type({})then body=table.concat(body,',')end
return body
end
p._jsonEncode=_jsonEncode
p._get_libqrcode=function()return init_qrcode_library()end
return p