added moonscript package

This commit is contained in:
kepler155c@gmail.com
2020-06-05 21:38:45 -06:00
parent b289594c7f
commit 4f74ab2840
15 changed files with 1799 additions and 461 deletions

View File

@@ -1,142 +0,0 @@
-- see: https://github.com/Rochet2/lualzw
-- MIT License - Copyright (c) 2016 Rochet2
local char = string.char
local type = type
local sub = string.sub
local tconcat = table.concat
local SIGC = 'LZWC'
local basedictcompress = {}
local basedictdecompress = {}
for i = 0, 255 do
local ic, iic = char(i), char(i, 0)
basedictcompress[ic] = iic
basedictdecompress[iic] = ic
end
local function dictAddA(str, dict, a, b)
if a >= 256 then
a, b = 0, b+1
if b >= 256 then
dict = {}
b = 1
end
end
dict[str] = char(a,b)
a = a+1
return dict, a, b
end
local function compress(input)
if type(input) ~= "string" then
error ("string expected, got "..type(input))
end
local len = #input
if len <= 1 then
return input
end
local dict = {}
local a, b = 0, 1
local result = { SIGC }
local resultlen = 1
local n = 2
local word = ""
for i = 1, len do
local c = sub(input, i, i)
local wc = word..c
if not (basedictcompress[wc] or dict[wc]) then
local write = basedictcompress[word] or dict[word]
if not write then
error "algorithm error, could not fetch word"
end
result[n] = write
resultlen = resultlen + #write
n = n+1
if len <= resultlen then
return input
end
dict, a, b = dictAddA(wc, dict, a, b)
word = c
else
word = wc
end
end
result[n] = basedictcompress[word] or dict[word]
resultlen = resultlen+#result[n]
if len <= resultlen then
return input
end
return tconcat(result)
end
local function dictAddB(str, dict, a, b)
if a >= 256 then
a, b = 0, b+1
if b >= 256 then
dict = {}
b = 1
end
end
dict[char(a,b)] = str
a = a+1
return dict, a, b
end
local function decompress(input)
if type(input) ~= "string" then
error( "string expected, got "..type(input))
end
if #input <= 1 then
return input
end
local control = sub(input, 1, 4)
if control ~= SIGC then
return input
end
input = sub(input, 5)
local len = #input
if len < 2 then
error("invalid input - not a compressed string")
end
local dict = {}
local a, b = 0, 1
local result = {}
local n = 1
local last = sub(input, 1, 2)
result[n] = basedictdecompress[last] or dict[last]
n = n+1
for i = 3, len, 2 do
local code = sub(input, i, i+1)
local lastStr = basedictdecompress[last] or dict[last]
if not lastStr then
error( "could not find last from dict. Invalid input?")
end
local toAdd = basedictdecompress[code] or dict[code]
if toAdd then
result[n] = toAdd
n = n+1
dict, a, b = dictAddB(lastStr..sub(toAdd, 1, 1), dict, a, b)
else
local tmp = lastStr..sub(lastStr, 1, 1)
result[n] = tmp
n = n+1
dict, a, b = dictAddB(tmp, dict, a, b)
end
last = code
end
return tconcat(result)
end
return {
compress = compress,
decompress = decompress,
}

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@@ -1,212 +0,0 @@
-- see: https://github.com/luarocks/luarocks/blob/master/src/luarocks/tools/tar.lua
-- A pure-Lua implementation of untar (unpacking .tar archives)
local Util = require('opus.util')
local fs = _G.fs
local blocksize = 512
local function get_typeflag(flag)
if flag == "0" or flag == "\0" then return "file"
elseif flag == "1" then return "link"
elseif flag == "2" then return "symlink" -- "reserved" in POSIX, "symlink" in GNU
elseif flag == "3" then return "character"
elseif flag == "4" then return "block"
elseif flag == "5" then return "directory"
elseif flag == "6" then return "fifo"
elseif flag == "7" then return "contiguous" -- "reserved" in POSIX, "contiguous" in GNU
elseif flag == "x" then return "next file"
elseif flag == "g" then return "global extended header"
elseif flag == "L" then return "long name"
elseif flag == "K" then return "long link name"
end
return "unknown"
end
local function octal_to_number(octal)
local exp = 0
local number = 0
octal = octal:gsub("%s", "")
for i = #octal,1,-1 do
local digit = tonumber(octal:sub(i,i))
if not digit then
break
end
number = number + (digit * 8^exp)
exp = exp + 1
end
return number
end
local function checksum_header(block)
local sum = 256
for i = 1,148 do
local b = block:byte(i) or 0
sum = sum + b
end
for i = 157,500 do
local b = block:byte(i) or 0
sum = sum + b
end
return sum
end
local function nullterm(s)
return s:match("^[^%z]*")
end
local function read_header_block(block)
local header = {}
header.name = nullterm(block:sub(1,100))
header.mode = nullterm(block:sub(101,108)):gsub(" ", "")
header.uid = octal_to_number(nullterm(block:sub(109,116)))
header.gid = octal_to_number(nullterm(block:sub(117,124)))
header.size = octal_to_number(nullterm(block:sub(125,136)))
header.mtime = octal_to_number(nullterm(block:sub(137,148)))
header.chksum = octal_to_number(nullterm(block:sub(149,156)))
header.typeflag = get_typeflag(block:sub(157,157))
header.linkname = nullterm(block:sub(158,257))
header.magic = block:sub(258,263)
header.version = block:sub(264,265)
header.uname = nullterm(block:sub(266,297))
header.gname = nullterm(block:sub(298,329))
header.devmajor = octal_to_number(nullterm(block:sub(330,337)))
header.devminor = octal_to_number(nullterm(block:sub(338,345)))
header.prefix = block:sub(346,500)
if not checksum_header(block) == header.chksum then
return false, "Failed header checksum"
end
return header
end
local function untar(filename, destdir, verbose)
assert(type(filename) == "string")
assert(type(destdir) == "string")
local tar_handle = io.open(filename, "rb")
if not tar_handle then return nil, "Error opening file "..filename end
local long_name, long_link_name
local ok, err
local make_dir = function(a)
if not fs.exists(a) then
fs.makeDir(a)
end
return true
end
while true do
local block
repeat
block = tar_handle:read(blocksize)
until (not block) or checksum_header(block) > 256
if not block then break end
if #block < blocksize then
ok, err = nil, "Invalid block size -- corrupted file?"
break
end
local header
header, err = read_header_block(block)
if not header then
ok = false
break
end
local file_data = tar_handle:read(math.ceil(header.size / blocksize) * blocksize):sub(1,header.size)
if header.typeflag == "long name" then
long_name = nullterm(file_data)
elseif header.typeflag == "long link name" then
long_link_name = nullterm(file_data)
else
if long_name then
header.name = long_name
long_name = nil
end
if long_link_name then
header.name = long_link_name
long_link_name = nil
end
end
local pathname = fs.combine(destdir, header.name)
if header.typeflag == "directory" then
ok, err = make_dir(pathname)
if not ok then
break
end
elseif header.typeflag == "file" then
local dirname = fs.getDir(pathname)
if dirname ~= "" then
ok, err = make_dir(dirname)
if not ok then
break
end
end
local file_handle
if verbose then
print(pathname)
end
file_handle, err = io.open(pathname, "wb")
if not file_handle then
ok = nil
break
end
file_handle:write(file_data)
file_handle:close()
end
end
tar_handle:close()
return ok, err
end
local function create_header_block(filename, abspath)
local block = ('\0'):rep(blocksize)
local function number_to_octal(n)
return ('%o'):format(n)
end
local function ins(pos, istr)
block = block:sub(1, pos - 1) .. istr .. block:sub(pos + #istr)
end
ins(1, filename) -- header
ins(125, number_to_octal(fs.getSize(abspath)))
ins(157, '0') -- typeflag
ins(149, number_to_octal(checksum_header(block)))
return block
end
-- the bare minimum for this program to untar
local function tar(filename, root, files)
assert(type(filename) == "string")
assert(type(root) == "string")
assert(type(files) == "table")
local tar_handle = io.open(filename, "wb")
if not tar_handle then return nil, "Error opening file "..filename end
for _, file in pairs(files) do
local abs = fs.combine(root, file)
local block = create_header_block(file, abs)
tar_handle:write(block)
local f = Util.readFile(abs, 'rb')
tar_handle:write(f)
local padding = #f % blocksize
if padding > 0 then
tar_handle:write(('\0'):rep(blocksize - padding))
end
end
tar_handle:close()
return true
end
return {
tar = tar,
untar = untar,
}

View File

@@ -1,14 +1,10 @@
local LZW = require('compress.lzw')
local Tar = require('compress.tar')
local LZW = require('opus.compress.lzw')
local Tar = require('opus.compress.tar')
local Util = require('opus.util')
local fs = _G.fs
local shell = _ENV.shell
local TMP_FILE = '.out.tar'
local args = { ... }
local files = { }
if not args[2] then
error('Syntax: tar OUTFILE DIR')
@@ -24,30 +20,10 @@ elseif file:match('(.+)%.lzw$') then
filetype = 'lzw'
end
local function recurse(rel)
local abs = fs.combine(dir, rel)
for _,f in ipairs(fs.list(abs)) do
local fullName = fs.combine(abs, f)
if fs.native.isDir(fullName) then -- skip virtual dirs
recurse(fs.combine(rel, f))
else
table.insert(files, fs.combine(rel, f))
end
end
end
recurse('')
if filetype == 'tar' then
Tar.tar(file, dir, files)
Tar.tar(file, dir)
elseif filetype == 'lzw' then
fs.mount(TMP_FILE, 'ramfs', 'file')
Tar.tar(TMP_FILE, dir, files)
local c = Util.readFile(TMP_FILE)
fs.delete(TMP_FILE)
c = LZW.compress(c)
Util.writeFile(file, c)
local c = Tar.tar_string(dir)
Util.writeFile(file, LZW.compress(c), 'wb')
end

View File

@@ -1,14 +1,11 @@
local DEFLATE = require('compress.deflatelua')
local LZW = require('compress.lzw')
local Tar = require('compress.tar')
local LZW = require('opus.compress.lzw')
local Tar = require('opus.compress.tar')
local Util = require('opus.util')
local fs = _G.fs
local io = _G.io
local shell = _ENV.shell
local TMP_FILE = '.out.tar'
local args = { ... }
if not args[2] then
@@ -18,49 +15,40 @@ end
local inFile = shell.resolve(args[1])
local outDir = shell.resolve(args[2])
local s, m = pcall(function()
if inFile:match('(.+)%.[gG][zZ]$') then
local fh = io.open(inFile, 'rb') or error('Error opening ' .. inFile)
if inFile:match('(.+)%.[gG][zZ]$') then
-- uncompress a file created with: tar czf ...
local fh = io.open(inFile, 'rb') or error('Error opening ' .. inFile)
fs.mount(TMP_FILE, 'ramfs', 'file')
local ofh = io.open(TMP_FILE, 'wb')
DEFLATE.gunzip {input=fh, output=ofh, disable_crc=true}
fh:close()
ofh:close()
local s, m = Tar.untar(TMP_FILE, outDir, true)
if not s then
error(m)
end
elseif inFile:match('(.+)%.lzw$') then
local c = Util.readFile(inFile)
if not c then
error('Unable to open ' .. inFile)
end
fs.mount(TMP_FILE, 'ramfs', 'file')
Util.writeFile(TMP_FILE, LZW.decompress(c))
local s, m = Tar.untar(TMP_FILE, outDir, true)
if not s then
error(m)
end
else
local s, m = Tar.untar(inFile, outDir)
if not s then
error(m)
end
local t = { }
local function writer(b)
table.insert(t, b)
end
end)
fs.delete(TMP_FILE)
DEFLATE.gunzip {input=fh, output=writer, disable_crc=true}
if not s then
error(m)
fh:close()
local s, m = Tar.untar_string(string.char(table.unpack(t)), outDir, true)
if not s then
error(m)
end
elseif inFile:match('(.+)%.tar%.lzw$') then
local c = Util.readFile(inFile, 'rb')
if not c then
error('Unable to open ' .. inFile)
end
local s, m = Tar.untar_string(LZW.decompress(c), outDir, true)
if not s then
error(m)
end
else
local s, m = Tar.untar(inFile, outDir, true)
if not s then
error(m)
end
end