Safer nicotine wiki

Module:BaseConvert: Difference between revisions

Module Discussion

Module:BaseConvert (view source)

Revision as of 05:58, 13 April 2022

359 bytes removed ,  2 years ago
update from Module:BaseConvert/sandbox per talk; this removes globals
m (1 revision imported)
(update from Module:BaseConvert/sandbox per talk; this removes globals)
Line 3: Line 3:
local digits = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
local digits = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'


function normalizeFullWidthChars(s)
local function normalizeFullWidthChars(s)
    return mw.ustring.gsub(s, '[！-～]', function(s)  
return mw.ustring.gsub(s, '[！-～]', function(s)
        return mw.ustring.char(mw.ustring.codepoint(s, 1) - 0xFEE0)  
return mw.ustring.char(mw.ustring.codepoint(s, 1) - 0xFEE0)
    end)  
end)
end
end


function _convert(n, base, from, precision, width, default, prefix, suffix)
local function _convert(n, base, from, precision, width, default, prefix, suffix)
    n = '' .. n  -- convert to a string
n = tostring(n)
   
    -- strip off any leading '0x' (unless x is a valid digit in the input base)
    from = tonumber(from)
    if not from or from < 34 then
        local c
        n, c = n:gsub('^(-?)0[Xx]', '%1')
        if c > 0 and not from then from = 16 end
    end


    -- check for a negative sign. Do this while the input is still in string form,
-- strip off any leading '0x' (unless x is a valid digit in the input base)
    -- because tonumber doesn't support negative numbers in non-10 bases.
from = tonumber(from)
    local sign = ''
if not from or from < 34 then
    local c
local c
    n, c = n:gsub('^-', '')
n, c = n:gsub('^(-?)0[Xx]', '%1')
    if c > 0 then sign = '-' end
if c > 0 and not from then from = 16 end
   
end
    -- replace any full-width Unicode characters in the string with their ASCII equivalents
    n = normalizeFullWidthChars(n)
   
    -- handle scientific notation with whitespace around the 'e' e.g. '5 e7'
    n = n:gsub('%s*[eE]%s*', 'e')
   
    from = from or 10
    local num = tonumber(n, from)
    base = tonumber(base)
    precision = tonumber(precision)
    width = tonumber(width)
   
    if not num or not base then return default or n end
   
    local i, f = math.modf(num)


    local t = {}
-- check for a negative sign. Do this while the input is still in string form,
    repeat
-- because tonumber doesn't support negative numbers in non-10 bases.
        local d = (i % base) + 1
local sign = ''
        i = math.floor(i / base)
local c
        table.insert(t, 1, digits:sub(d, d))
n, c = n:gsub('^-', '')
    until i == 0
if c > 0 then sign = '-' end
    while #t < (width or 0) do
        table.insert(t, 1, '0')
    end
    local intPart = table.concat(t, '')
   
    -- compute the fractional part
    local tf = {}
    while f > 0 and #tf < (precision or 10) do
        f = f * base
        i, f = math.modf(f)
        table.insert(tf, digits:sub(i + 1, i + 1))
    end
   
    -- add trailing zeros if needed
    if precision and #tf < precision then
        for i = 1, precision - #tf do
            table.insert(tf, '0')
        end
    end


    fracPart = table.concat(tf, '')
-- replace any full-width Unicode characters in the string with their ASCII equivalents
   
n = normalizeFullWidthChars(n)
    -- remove trailing zeros if not needed
 
    if not precision then
-- handle scientific notation with whitespace around the 'e' e.g. '5 e7'
        fracPart = fracPart:gsub('0*$', '')
n = n:gsub('%s*[eE]%s*', 'e')
    end
 
   
from = from or 10
    -- add the radix point if needed
local num = tonumber(n, from)
    if #fracPart > 0 then
base = tonumber(base)
        fracPart = '.' .. fracPart
precision = tonumber(precision)
    end
width = tonumber(width)
   
 
    return (prefix or '') .. sign .. intPart .. fracPart .. (suffix or '')
if not num or not base then return default or n end
 
local i, f = math.modf(num)
 
local t = {}
repeat
local d = (i % base) + 1
i = math.floor(i / base)
table.insert(t, 1, digits:sub(d, d))
until i == 0
while #t < (width or 0) do
table.insert(t, 1, '0')
end
local intPart = table.concat(t, '')
 
-- compute the fractional part
local tf = {}
while f > 0 and #tf < (precision or 10) do
f = f * base
i, f = math.modf(f)
table.insert(tf, digits:sub(i + 1, i + 1))
end
 
-- add trailing zeros if needed
if precision and #tf < precision then
for i = 1, precision - #tf do
table.insert(tf, '0')
end
end
 
local fracPart = table.concat(tf, '')
 
-- remove trailing zeros if not needed
if not precision then
fracPart = fracPart:gsub('0*$', '')
end
 
-- add the radix point if needed
if #fracPart > 0 then
fracPart = '.' .. fracPart
end
 
return (prefix or '') .. sign .. intPart .. fracPart .. (suffix or '')
end
end


function p.convert(frame)
function p.convert(frame)
    -- Allow for invocation via #invoke or directly from another module
-- Allow for invocation via #invoke or directly from another module
    local args
local args
    if frame == mw.getCurrentFrame() then
if frame == mw.getCurrentFrame() then
        args = frame.args
args = frame.args
    else
else
        args = frame
args = frame
    end
end
   
 
    local n = args.n
local n = args.n
    local base = args.base
local base = args.base
    local from = args.from
local from = args.from
    local precision = args.precision
local precision = args.precision
    local width = args.width
local width = args.width
    local default = args.default
local default = args.default
    local prefix = args.prefix
local prefix = args.prefix
    local suffix = args.suffix
local suffix = args.suffix
    return _convert(n, base, from, precision, width, default, prefix, suffix)
return _convert(n, base, from, precision, width, default, prefix, suffix)
end
end


setmetatable(p, {
setmetatable(p, {
__index = function(t, k)
__index = function(t, k)
from, base = k:match('^([0-9]+)to([0-9]+)$')
local from, base = k:match('^([0-9]+)to([0-9]+)$')
if not from then return nil end
if not from then return nil end
return function(frame)
return function(frame)
args = frame.args
local args = frame.args
    return _convert(mw.text.trim(args[1]), base, from, args['precision'], args['width'],
return _convert(mw.text.trim(args[1]), base, from, args.precision, args.width,
    args['default'], args['prefix'], args['suffix'])
args.default, args.prefix, args.suffix)
    end
end
end
end
})
})


return p
return p
Anonymous user
Retrieved from ‘https://safernicotine.wiki/mediawiki/index.php/Special:MobileDiff/25061’