Difference between revisions of "Module:Sandbox/Erutuon/UTF-8"
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blackwiki>Erutuon (newbie mistake) |
blackwiki>Erutuon (grab binary digit) |
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| Line 4: | Line 4: | ||
local band = bit.band | local band = bit.band | ||
local rshift = bit.rshift | local rshift = bit.rshift | ||
| + | |||
| + | local function binary(stringBinary) | ||
| + | return tonumber(stringBinary, 2) | ||
| + | end | ||
| + | |||
| + | -- Assumes in a single byte, with highest digit first. | ||
| + | local function digitAt(number, index) | ||
| + | return band(rshift(number, 8 - index), 1) | ||
| + | end | ||
local function getBits(byte) | local function getBits(byte) | ||
| Line 13: | Line 22: | ||
return t | return t | ||
end | end | ||
| + | |||
| + | -- mw.log(table.concat(getBits(rshift(binary("11100001"), 8 - 3)))) | ||
local function iterBytes(str, func) | local function iterBytes(str, func) | ||
| Line 32: | Line 43: | ||
), | ), | ||
" " | " " | ||
| − | ) | + | ) .. "\n\n" .. "digits 3 and 4 in 11100001: " .. digitAt(binary("11100001"), 3) .. ", " .. digitAt(binary("11100001"), 4) |
end | end | ||
return p | return p | ||
Revision as of 06:52, 17 September 2017
An experiment with printing binary digit representations of characters.
Usage
01100001 01111110 11000010 10100001 11000011 10100001 11001110 10110001 11100001 10111110 10110000 11110000 10100000 10000000 10000000
digits 3 and 4 in 11100001: 1, 0
local p = {}
local bit = require("bit32")
local band = bit.band
local rshift = bit.rshift
local function binary(stringBinary)
return tonumber(stringBinary, 2)
end
-- Assumes in a single byte, with highest digit first.
local function digitAt(number, index)
return band(rshift(number, 8 - index), 1)
end
local function getBits(byte)
local t = {}
for bit = 8, 1, -1 do
t[bit] = band(byte, 1)
byte = rshift(byte, 1)
end
return t
end
-- mw.log(table.concat(getBits(rshift(binary("11100001"), 8 - 3))))
local function iterBytes(str, func)
local out = {}
for i = 1, #str do
table.insert(out, func(string.byte(str, i)))
end
return out
end
function p.show(frame)
local str = frame.args[1] or "ᾰ̓τῑμᾰ́ζω"
return table.concat(
iterBytes(
str,
function(byte)
return table.concat(getBits(byte))
end
),
" "
) .. "\n\n" .. "digits 3 and 4 in 11100001: " .. digitAt(binary("11100001"), 3) .. ", " .. digitAt(binary("11100001"), 4)
end
return p