Difference between revisions of "Module:Sandbox/Erutuon/UTF-8"
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blackwiki>Erutuon (show characters) |
blackwiki>Erutuon (highlighting non-codepoint parts of encoding) |
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| Line 10: | Line 10: | ||
end | end | ||
| − | -- | + | -- Find the digit at a certain position in a byte. |
local function digitAt(number, index) | local function digitAt(number, index) | ||
if type(number) == "string" then | if type(number) == "string" then | ||
| Line 18: | Line 18: | ||
end | end | ||
| − | -- Returns a table containing bits in a byte, | + | -- Returns a table containing bits in a byte, from highest to lowest. |
local function getBits(byte) | local function getBits(byte) | ||
local t = {} | local t = {} | ||
| Line 37: | Line 37: | ||
end | end | ||
return out | return out | ||
| + | end | ||
| + | |||
| + | local function markDigits(byteTable) | ||
| + | local tag1 = { '<span style="color: deeppink;>', '</span>' } | ||
| + | local tag2 = { '<span style="color: chocolate;>', '</span>' } | ||
| + | local last | ||
| + | local onesCount = 0 | ||
| + | for i, digit in ipairs(byteTable) do | ||
| + | if digit == 1 then | ||
| + | onesCount = onesCount + 1 | ||
| + | last = digit | ||
| + | else | ||
| + | local tag | ||
| + | if onesCount > 1 then | ||
| + | tag = tag1 | ||
| + | else | ||
| + | tag = tag2 | ||
| + | end | ||
| + | table.insert(byteTable, i + 1, tag[2]) | ||
| + | table.insert(byteTable, 1, tag[1]) | ||
| + | return byteTable | ||
| + | end | ||
| + | end | ||
| + | return byteTable | ||
end | end | ||
| Line 44: | Line 68: | ||
str, | str, | ||
function(byte) | function(byte) | ||
| − | return table.concat(getBits(byte)) | + | return table.concat(markDigits(getBits(byte))) |
end | end | ||
), | ), | ||
Revision as of 09:45, 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
| a | ~ | ¡ | á | α | ᾰ | 𠀀 |
01100001 |
01111110 |
11000010 10100001 |
11000011 10100001 |
11001110 10110001 |
11100001 10111110 10110000 |
11110000 10100000 10000000 10000000 |
local p = {}
local bit = require("bit32")
local band = bit.band
local rshift = bit.rshift
-- Converts a string representing a number in binary base to a Lua number.
local function binary(stringBinary)
return tonumber(stringBinary, 2)
end
-- Find the digit at a certain position in a byte.
local function digitAt(number, index)
if type(number) == "string" then
number = binary(number)
end
return band(rshift(number, 8 - index), 1)
end
-- Returns a table containing bits in a byte, from highest to lowest.
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))))
-- Do something to each byte in a string; put the result in a table.
local function iterBytes(str, func)
local out = {}
for i = 1, #str do
table.insert(out, func(string.byte(str, i)))
end
return out
end
local function markDigits(byteTable)
local tag1 = { '<span style="color: deeppink;>', '</span>' }
local tag2 = { '<span style="color: chocolate;>', '</span>' }
local last
local onesCount = 0
for i, digit in ipairs(byteTable) do
if digit == 1 then
onesCount = onesCount + 1
last = digit
else
local tag
if onesCount > 1 then
tag = tag1
else
tag = tag2
end
table.insert(byteTable, i + 1, tag[2])
table.insert(byteTable, 1, tag[1])
return byteTable
end
end
return byteTable
end
local function printBytes(str)
return table.concat(
iterBytes(
str,
function(byte)
return table.concat(markDigits(getBits(byte)))
end
),
" "
)
end
local function makeCharByteTables(str)
local chars = {}
local bytes = {}
local uLen = mw.ustring.len(str)
for i = 1, uLen do
local char = mw.ustring.sub(str, i, i)
table.insert(chars, char)
table.insert(bytes, printBytes(char))
end
return chars, bytes
end
local function print(chars, bytes)
local output = { '{| class="wikitable"'}
for i, char in ipairs(chars) do
table.insert(output, "| " .. char)
end
table.insert(output, "|-")
for i, byteString in ipairs(bytes) do
table.insert(output, "| <code>" .. byteString .. "<code>")
end
table.insert(output, "|}")
return table.concat(output, "\n")
end
function p.show(frame)
local str = frame.args[1] or "ᾰ̓τῑμᾰ́ζω"
return printBytes(str) .. "\n" .. print(makeCharByteTables(str))
end
return p