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Merge branch 'master' of https://github.com/marcoskirsch/nodemcu-httpserver

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Marcos Kirsch 8 år sedan
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1 ändrade filer med 0 tillägg och 67 borttagningar
  1. 0 67
      b64.lua

+ 0 - 67
b64.lua

@@ -1,67 +0,0 @@
-#!/usr/local/bin/lua
--- Based on http://lua-users.org/wiki/BaseSixtyFour by Alex Kloss
--- compatible with lua 5.1
--- http://www.it-rfc.de
--- licensed under the terms of the LGPL2
-
-b64 = {}
-
--- bitshift functions (<<, >> equivalent)
--- shift left
-local function lsh(value,shift)
-	return (value*(2^shift)) % 256
-end
-
--- shift right
-local function rsh(value,shift)
-   -- Lua builds with no floating point don't define math.
-   if math then return math.floor(value/2^shift) % 256 end
-   return (value/2^shift) % 256
-end
-
--- return single bit (for OR)
-local function bit(x,b)
-	return (x % 2^b - x % 2^(b-1) > 0)
-end
-
--- logic OR for number values
-local function lor(x,y)
-	result = 0
-	for p=1,8 do result = result + (((bit(x,p) or bit(y,p)) == true) and 2^(p-1) or 0) end
-	return result
-end
-
--- Character decoding table
-local function toBase64Byte(char)
-   ascii = string.byte(char, 1)
-   if ascii >= string.byte('A', 1) and ascii <= string.byte('Z', 1) then return ascii - string.byte('A', 1)
-   elseif ascii >= string.byte('a', 1) and ascii <= string.byte('z', 1) then return ascii - string.byte('a', 1) + 26
-   elseif ascii >= string.byte('0', 1) and ascii <= string.byte('9', 1) then return ascii + 4
-   elseif ascii == string.byte('-', 1) then return 62
-   elseif ascii == string.byte('_', 1) then return 63
-   elseif ascii == string.byte('=', 1) then return nil
-   else return nil, "ERROR! Char is invalid for Base64 encoding: "..char end
-end
-
-
--- function decode
--- decode base64 input to string
-function b64.decode(data)
-	local chars = {}
-	local result=""
-	for dpos=0,string.len(data)-1,4 do
-		for char=1,4 do chars[char] = toBase64Byte((string.sub(data,(dpos+char),(dpos+char)) or "=")) end
-			result = string.format(
-		   '%s%s%s%s',
-		   result,
-		   string.char(lor(lsh(chars[1],2), rsh(chars[2],4))),
-		   (chars[3] ~= nil) and string.char(lor(lsh(chars[2],4),
-		   rsh(chars[3],2))) or "",
-		   (chars[4] ~= nil) and string.char(lor(lsh(chars[3],6) % 192,
-		   (chars[4]))) or ""
-		)
-	end
-	return result
-end
-
-return b64