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#!/usr/bin/env lua
local io = require "io"
local ioopen = io.open
local string = require "string"
local stringformat = string.format
local println = function (...) print (stringformat (...)) end
local parse_calendar do
local lpeg = require "lpeg"
local lpegmatch = lpeg.match
local P = lpeg.P
local C = lpeg.C
local Cp = lpeg.Cp
local p_cr = P"\r"
local p_lf = P"\n"
local p_eol = p_cr * p_lf + p_lf
local p_noeol = P(1) - p_eol
local p_content_line = C (p_noeol^1) * p_eol * Cp ()
local parse_content_line = function (raw, pos0)
local res, pos1 = lpegmatch (p_content_line, raw, pos0)
return res, pos1
end
parse_calendar = function (raw, pos0, consumed)
if pos0 == nil then return parse_calendar (raw, 1, 0) end
local cline, pos1 = parse_content_line (raw, pos0)
println ("»»» [%d–%d] [%s]", pos0, pos1, cline)
return parse_calendar (raw, pos1, consumed + pos1 - pos0)
end
end
local print_calendar do
end
local loaddata = function (fname)
local fh = ioopen (fname, "r")
if fh == nil then
error ("could not open file " .. fname .. " for reading")
end
return fh:read ("*a")
end
local main = function (argv)
if #argv ~= 1 then
error "pass me a file name, I insist!"
end
local raw = loaddata (argv [1])
return parse_calendar (raw)
end
return main (arg)
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