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if not modules then modules = { } end modules ['util-fil'] = {
version = 1.001,
optimize = true,
comment = "companion to luat-lib.mkxl",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- For the old ones, see util-fil.lua.
local byte = string.byte
local char = string.char
utilities = utilities or { }
local files = { }
utilities.files = files
local zerobased = { }
function files.open(filename,zb)
local f = io.open(filename,"rb")
if f then
zerobased[f] = zb or false
end
return f
end
function files.close(f)
if f then
zerobased[f] = nil
f:close()
end
end
function files.size(f)
if f then
local current = f:seek()
local size = f:seek("end")
f:seek("set",current)
return size
else
return 0
end
end
files.getsize = files.size
function files.setposition(f,n)
if zerobased[f] then
f:seek("set",n)
else
f:seek("set",n - 1)
end
end
function files.getposition(f)
if zerobased[f] then
return f:seek()
else
return f:seek() + 1
end
end
function files.look(f,n,chars)
local p = f:seek()
local s = f:read(n)
f:seek("set",p)
if chars then
return s
else
return byte(s,1,#s)
end
end
function files.skip(f,n)
if n == 1 then
f:read(n)
else
f:seek("set",f:seek()+n)
end
end
-- readers:
files.readcardinal1 = fio.readcardinal1
files.readcardinal2 = fio.readcardinal2
files.readcardinal3 = fio.readcardinal3
files.readcardinal4 = fio.readcardinal4
files.readcardinal1le = fio.readcardinal1le or files.readcardinal1le
files.readcardinal2le = fio.readcardinal2le or files.readcardinal2le
files.readcardinal3le = fio.readcardinal3le or files.readcardinal3le
files.readcardinal4le = fio.readcardinal4le or files.readcardinal4le
files.readinteger1 = fio.readinteger1
files.readinteger2 = fio.readinteger2
files.readinteger3 = fio.readinteger3
files.readinteger4 = fio.readinteger4
files.readinteger1le = fio.readinteger1le or files.readinteger1le
files.readinteger2le = fio.readinteger2le or files.readinteger2le
files.readinteger3le = fio.readinteger3le or files.readinteger3le
files.readinteger4le = fio.readinteger4le or files.readinteger4le
files.readfixed2 = fio.readfixed2
files.readfixed4 = fio.readfixed4
files.read2dot14 = fio.read2dot14
files.setposition = fio.setposition
files.getposition = fio.getposition
files.readbyte = files.readcardinal1
files.readsignedbyte = files.readinteger1
files.readcardinal = files.readcardinal1
files.readinteger = files.readinteger1
local skipposition = fio.skipposition
files.skipposition = skipposition
files.readbytes = fio.readbytes
files.readbytetable = fio.readbytetable
files.readcardinaltable = fio.readcardinaltable
files.readintegertable = fio.readintegertable
files.readcstring = fio.readcstring
files.readcline = fio.readcline
function files.readchar(f)
return f:read(1)
end
function files.readstring(f,n)
return f:read(n or 1)
end
function files.skipshort(f,n)
skipposition(f,2*(n or 1))
end
function files.skiplong(f,n)
skipposition(f,4*(n or 1))
end
-- writers
function files.writestring(f,s)
f:write(char(byte(s,1,#s)))
end
function files.writebyte(f,b)
f:write(char(b))
end
files.writecardinal1 = fio.writecardinal1
files.writecardinal2 = fio.writecardinal2
files.writecardinal3 = fio.writecardinal3
files.writecardinal4 = fio.writecardinal4
files.writecardinal1le = fio.writecardinal1le
files.writecardinal2le = fio.writecardinal2le
files.writecardinal3le = fio.writecardinal3le
files.writecardinal4le = fio.writecardinal4le
files.writeinteger1 = fio.writeinteger1 or fio.writecardinal1
files.writeinteger2 = fio.writeinteger2 or fio.writecardinal2
files.writeinteger3 = fio.writeinteger3 or fio.writecardinal3
files.writeinteger4 = fio.writeinteger4 or fio.writecardinal4
files.writeinteger1le = files.writeinteger1le or fio.writecardinal1le
files.writeinteger2le = files.writeinteger2le or fio.writecardinal2le
files.writeinteger3le = files.writeinteger3le or fio.writecardinal3le
files.writeinteger4le = files.writeinteger4le or fio.writecardinal4le
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