diff options
| -rw-r--r-- | lualibs-md5.lua | 57 |
1 files changed, 44 insertions, 13 deletions
diff --git a/lualibs-md5.lua b/lualibs-md5.lua index 6abf2e1..8ac20a5 100644 --- a/lualibs-md5.lua +++ b/lualibs-md5.lua @@ -7,29 +7,60 @@ if not modules then modules = { } end modules ['l-md5'] = { -- This also provides file checksums and checkers. +if not md5 then + md5 = optionalrequire("md5") +end + +if not md5 then + md5 = { + sum = function(str) print("error: md5 is not loaded (sum ignored)") return str end, + sumhexa = function(str) print("error: md5 is not loaded (sumhexa ignored)") return str end, + } +end + local md5, file = md5, file local gsub, format, byte = string.gsub, string.format, string.byte +local md5sum = md5.sum local function convert(str,fmt) - return (gsub(md5.sum(str),".",function(chr) return format(fmt,byte(chr)) end)) + return (gsub(md5sum(str),".",function(chr) return format(fmt,byte(chr)) end)) end if not md5.HEX then function md5.HEX(str) return convert(str,"%02X") end end if not md5.hex then function md5.hex(str) return convert(str,"%02x") end end if not md5.dec then function md5.dec(str) return convert(str,"%03i") end end ---~ if not md5.HEX then ---~ local function remap(chr) return format("%02X",byte(chr)) end ---~ function md5.HEX(str) return (gsub(md5.sum(str),".",remap)) end ---~ end ---~ if not md5.hex then ---~ local function remap(chr) return format("%02x",byte(chr)) end ---~ function md5.hex(str) return (gsub(md5.sum(str),".",remap)) end ---~ end ---~ if not md5.dec then ---~ local function remap(chr) return format("%03i",byte(chr)) end ---~ function md5.dec(str) return (gsub(md5.sum(str),".",remap)) end ---~ end +-- local P, Cs, lpegmatch = lpeg.P, lpeg.Cs,lpeg.match +-- +-- if not md5.HEX then +-- local function remap(chr) return format("%02X",byte(chr)) end +-- function md5.HEX(str) return (gsub(md5.sum(str),".",remap)) end +-- end +-- +-- if not md5.hex then +-- local function remap(chr) return format("%02x",byte(chr)) end +-- function md5.hex(str) return (gsub(md5.sum(str),".",remap)) end +-- end +-- +-- if not md5.dec then +-- local function remap(chr) return format("%03i",byte(chr)) end +-- function md5.dec(str) return (gsub(md5.sum(str),".",remap)) end +-- end + +-- if not md5.HEX then +-- local pattern_HEX = Cs( ( P(1) / function(chr) return format("%02X",byte(chr)) end)^0 ) +-- function md5.HEX(str) return lpegmatch(pattern_HEX,md5.sum(str)) end +-- end +-- +-- if not md5.hex then +-- local pattern_hex = Cs( ( P(1) / function(chr) return format("%02x",byte(chr)) end)^0 ) +-- function md5.hex(str) return lpegmatch(pattern_hex,md5.sum(str)) end +-- end +-- +-- if not md5.dec then +-- local pattern_dec = Cs( ( P(1) / function(chr) return format("%02i",byte(chr)) end)^0 ) +-- function md5.dec(str) return lpegmatch(pattern_dec,md5.sum(str)) end +-- end function file.needsupdating(oldname,newname,threshold) -- size modification access change local oldtime = lfs.attributes(oldname,"modification") |