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if not modules then modules = { } end modules ['util-fmt'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
utilities = utilities or { }
utilities.formatters = utilities.formatters or { }
local formatters = utilities.formatters
local concat, format = table.concat, string.format
local tostring, type = tostring, type
local strip = string.strip
local P, R, Cs = lpeg.P, lpeg.R, lpeg.Cs
local lpegmatch = lpeg.match
-- temporary here
local digit = R("09")
local period = P(".")
local zero = P("0")
local trailingzeros = zero^0 * -digit -- suggested by Roberto R
local case_1 = period * trailingzeros / ""
local case_2 = period * (digit - trailingzeros)^1 * (trailingzeros / "")
local number = digit^1 * (case_1 + case_2)
local stripper = Cs((number + 1)^0)
--~ local sample = "bla 11.00 bla 11 bla 0.1100 bla 1.00100 bla 0.00 bla 0.001 bla 1.1100 bla 0.100100100 bla 0.00100100100"
--~ collectgarbage("collect")
--~ str = string.rep(sample,10000)
--~ local ts = os.clock()
--~ lpegmatch(stripper,str)
--~ print(#str, os.clock()-ts, lpegmatch(stripper,sample))
lpeg.patterns.strip_zeros = stripper
function formatters.strip_zeros(str)
return lpegmatch(stripper,str)
end
function formatters.formatcolumns(result,between)
if result and #result > 0 then
between = between or " "
local widths, numbers = { }, { }
local first = result[1]
local n = #first
for i=1,n do
widths[i] = 0
end
for i=1,#result do
local r = result[i]
for j=1,n do
local rj = r[j]
local tj = type(rj)
if tj == "number" then
numbers[j] = true
end
if tj ~= "string" then
rj = tostring(rj)
r[j] = rj
end
local w = #rj
if w > widths[j] then
widths[j] = w
end
end
end
for i=1,n do
local w = widths[i]
if numbers[i] then
if w > 80 then
widths[i] = "%s" .. between
else
widths[i] = "%0" .. w .. "i" .. between
end
else
if w > 80 then
widths[i] = "%s" .. between
elseif w > 0 then
widths[i] = "%-" .. w .. "s" .. between
else
widths[i] = "%s"
end
end
end
local template = strip(concat(widths))
for i=1,#result do
local str = format(template,unpack(result[i]))
result[i] = strip(str)
end
end
return result
end
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