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-rw-r--r--lualibs-file.lua682
1 files changed, 367 insertions, 315 deletions
diff --git a/lualibs-file.lua b/lualibs-file.lua
index bea4ef0..af86f93 100644
--- a/lualibs-file.lua
+++ b/lualibs-file.lua
@@ -11,67 +11,228 @@ if not modules then modules = { } end modules ['l-file'] = {
file = file or { }
local file = file
+if not lfs then
+ lfs = optionalrequire("lfs")
+end
+
+if not lfs then
+
+ lfs = {
+ getcurrentdir = function()
+ return "."
+ end,
+ attributes = function()
+ return nil
+ end,
+ isfile = function(name)
+ local f = io.open(name,'rb')
+ if f then
+ f:close()
+ return true
+ end
+ end,
+ isdir = function(name)
+ print("you need to load lfs")
+ return false
+ end
+ }
+
+elseif not lfs.isfile then
+
+ local attributes = lfs.attributes
+
+ function lfs.isdir(name)
+ return attributes(name,"mode") == "directory"
+ end
+
+ function lfs.isfile(name)
+ return attributes(name,"mode") == "file"
+ end
+
+ -- function lfs.isdir(name)
+ -- local a = attributes(name)
+ -- return a and a.mode == "directory"
+ -- end
+
+ -- function lfs.isfile(name)
+ -- local a = attributes(name)
+ -- return a and a.mode == "file"
+ -- end
+
+end
+
local insert, concat = table.insert, table.concat
-local find, gmatch, match, gsub, sub, char, lower = string.find, string.gmatch, string.match, string.gsub, string.sub, string.char, string.lower
+local match = string.match
local lpegmatch = lpeg.match
local getcurrentdir, attributes = lfs.currentdir, lfs.attributes
+local checkedsplit = string.checkedsplit
+
+-- local patterns = file.patterns or { }
+-- file.patterns = patterns
+
+local P, R, S, C, Cs, Cp, Cc, Ct = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Cs, lpeg.Cp, lpeg.Cc, lpeg.Ct
-local P, R, S, C, Cs, Cp, Cc = lpeg.P, lpeg.R, lpeg.S, lpeg.C, lpeg.Cs, lpeg.Cp, lpeg.Cc
+local colon = P(":")
+local period = P(".")
+local periods = P("..")
+local fwslash = P("/")
+local bwslash = P("\\")
+local slashes = S("\\/")
+local noperiod = 1-period
+local noslashes = 1-slashes
+local name = noperiod^1
+local suffix = period/"" * (1-period-slashes)^1 * -1
-local function dirname(name,default)
- return match(name,"^(.+)[/\\].-$") or (default or "")
+----- pattern = C((noslashes^0 * slashes^1)^1)
+local pattern = C((1 - (slashes^1 * noslashes^1 * -1))^1) * P(1) -- there must be a more efficient way
+
+local function pathpart(name,default)
+ return name and lpegmatch(pattern,name) or default or ""
end
+local pattern = (noslashes^0 * slashes)^1 * C(noslashes^1) * -1
+
local function basename(name)
- return match(name,"^.+[/\\](.-)$") or name
+ return name and lpegmatch(pattern,name) or name
end
--- local function nameonly(name)
--- return (gsub(match(name,"^.+[/\\](.-)$") or name,"%..*$",""))
--- end
+-- print(pathpart("file"))
+-- print(pathpart("dir/file"))
+-- print(pathpart("/dir/file"))
+-- print(basename("file"))
+-- print(basename("dir/file"))
+-- print(basename("/dir/file"))
+
+local pattern = (noslashes^0 * slashes^1)^0 * Cs((1-suffix)^1) * suffix^0
local function nameonly(name)
- return (gsub(match(name,"^.+[/\\](.-)$") or name,"%.[%a%d]+$",""))
+ return name and lpegmatch(pattern,name) or name
end
-local function suffixonly(name,default)
- return match(name,"^.+%.([^/\\]-)$") or default or ""
-end
+local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * C(noperiod^1) * -1
-local function splitname(name)
- local n, s = match(name,"^(.+)%.([^/\\]-)$")
- return n or name, s or ""
+local function suffixonly(name)
+ return name and lpegmatch(pattern,name) or ""
end
+file.pathpart = pathpart
file.basename = basename
-
-file.pathpart = dirname
-file.dirname = dirname
-
file.nameonly = nameonly
-
file.suffixonly = suffixonly
-file.extname = suffixonly -- obsolete
file.suffix = suffixonly
-function file.removesuffix(filename)
- return (gsub(filename,"%.[%a%d]+$",""))
+file.dirname = pathpart -- obsolete
+file.extname = suffixonly -- obsolete
+
+-- actually these are schemes
+
+local drive = C(R("az","AZ")) * colon
+local path = C((noslashes^0 * slashes)^0)
+local suffix = period * C(P(1-period)^0 * P(-1))
+local base = C((1-suffix)^0)
+local rest = C(P(1)^0)
+
+drive = drive + Cc("")
+path = path + Cc("")
+base = base + Cc("")
+suffix = suffix + Cc("")
+
+local pattern_a = drive * path * base * suffix
+local pattern_b = path * base * suffix
+local pattern_c = C(drive * path) * C(base * suffix) -- trick: two extra captures
+local pattern_d = path * rest
+
+function file.splitname(str,splitdrive)
+ if not str then
+ -- error
+ elseif splitdrive then
+ return lpegmatch(pattern_a,str) -- returns drive, path, base, suffix
+ else
+ return lpegmatch(pattern_b,str) -- returns path, base, suffix
+ end
+end
+
+function file.splitbase(str)
+ return str and lpegmatch(pattern_d,str) -- returns path, base+suffix
end
-function file.addsuffix(filename, suffix, criterium)
- if not suffix or suffix == "" then
+---- stripslash = C((1 - P("/")^1*P(-1))^0)
+
+function file.nametotable(str,splitdrive)
+ if str then
+ local path, drive, subpath, name, base, suffix = lpegmatch(pattern_c,str)
+ -- if path ~= "" then
+ -- path = lpegmatch(stripslash,path) -- unfortunate hack, maybe this becomes default
+ -- end
+ if splitdrive then
+ return {
+ path = path,
+ drive = drive,
+ subpath = subpath,
+ name = name,
+ base = base,
+ suffix = suffix,
+ }
+ else
+ return {
+ path = path,
+ name = name,
+ base = base,
+ suffix = suffix,
+ }
+ end
+ end
+end
+
+-- print(file.splitname("file"))
+-- print(file.splitname("dir/file"))
+-- print(file.splitname("/dir/file"))
+-- print(file.splitname("file"))
+-- print(file.splitname("dir/file"))
+-- print(file.splitname("/dir/file"))
+
+-- inspect(file.nametotable("file.ext"))
+-- inspect(file.nametotable("dir/file.ext"))
+-- inspect(file.nametotable("/dir/file.ext"))
+-- inspect(file.nametotable("file.ext"))
+-- inspect(file.nametotable("dir/file.ext"))
+-- inspect(file.nametotable("/dir/file.ext"))
+
+----- pattern = Cs(((period * noperiod^1 * -1) / "" + 1)^1)
+local pattern = Cs(((period * (1-period-slashes)^1 * -1) / "" + 1)^1)
+
+function file.removesuffix(name)
+ return name and lpegmatch(pattern,name)
+end
+
+-- local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * Cp() * noperiod^1 * -1
+--
+-- function file.addsuffix(name, suffix)
+-- local p = lpegmatch(pattern,name)
+-- if p then
+-- return name
+-- else
+-- return name .. "." .. suffix
+-- end
+-- end
+
+local suffix = period/"" * (1-period-slashes)^1 * -1
+local pattern = Cs((noslashes^0 * slashes^1)^0 * ((1-suffix)^1)) * Cs(suffix)
+
+function file.addsuffix(filename,suffix,criterium)
+ if not filename or not suffix or suffix == "" then
return filename
elseif criterium == true then
return filename .. "." .. suffix
elseif not criterium then
- local n, s = splitname(filename)
+ local n, s = lpegmatch(pattern,filename)
if not s or s == "" then
return filename .. "." .. suffix
else
return filename
end
else
- local n, s = splitname(filename)
+ local n, s = lpegmatch(pattern,filename)
if s and s ~= "" then
local t = type(criterium)
if t == "table" then
@@ -88,84 +249,54 @@ function file.addsuffix(filename, suffix, criterium)
end
end
end
- return n .. "." .. suffix
+ return (n or filename) .. "." .. suffix
end
end
---~ print("1 " .. file.addsuffix("name","new") .. " -> name.new")
---~ print("2 " .. file.addsuffix("name.old","new") .. " -> name.old")
---~ print("3 " .. file.addsuffix("name.old","new",true) .. " -> name.old.new")
---~ print("4 " .. file.addsuffix("name.old","new","new") .. " -> name.new")
---~ print("5 " .. file.addsuffix("name.old","new","old") .. " -> name.old")
---~ print("6 " .. file.addsuffix("name.old","new","foo") .. " -> name.new")
---~ print("7 " .. file.addsuffix("name.old","new",{"foo","bar"}) .. " -> name.new")
---~ print("8 " .. file.addsuffix("name.old","new",{"old","bar"}) .. " -> name.old")
-
-function file.replacesuffix(filename, suffix)
- return (gsub(filename,"%.[%a%d]+$","")) .. "." .. suffix
-end
-
---~ function file.join(...)
---~ local pth = concat({...},"/")
---~ pth = gsub(pth,"\\","/")
---~ local a, b = match(pth,"^(.*://)(.*)$")
---~ if a and b then
---~ return a .. gsub(b,"//+","/")
---~ end
---~ a, b = match(pth,"^(//)(.*)$")
---~ if a and b then
---~ return a .. gsub(b,"//+","/")
---~ end
---~ return (gsub(pth,"//+","/"))
---~ end
-
-local trick_1 = char(1)
-local trick_2 = "^" .. trick_1 .. "/+"
-
-function file.join(...) -- rather dirty
- local lst = { ... }
- local a, b = lst[1], lst[2]
- if not a or a == "" then -- not a added
- lst[1] = trick_1
- elseif b and find(a,"^/+$") and find(b,"^/") then
- lst[1] = ""
- lst[2] = gsub(b,"^/+","")
- end
- local pth = concat(lst,"/")
- pth = gsub(pth,"\\","/")
- local a, b = match(pth,"^(.*://)(.*)$")
- if a and b then
- return a .. gsub(b,"//+","/")
- end
- a, b = match(pth,"^(//)(.*)$")
- if a and b then
- return a .. gsub(b,"//+","/")
+-- print("1 " .. file.addsuffix("name","new") .. " -> name.new")
+-- print("2 " .. file.addsuffix("name.old","new") .. " -> name.old")
+-- print("3 " .. file.addsuffix("name.old","new",true) .. " -> name.old.new")
+-- print("4 " .. file.addsuffix("name.old","new","new") .. " -> name.new")
+-- print("5 " .. file.addsuffix("name.old","new","old") .. " -> name.old")
+-- print("6 " .. file.addsuffix("name.old","new","foo") .. " -> name.new")
+-- print("7 " .. file.addsuffix("name.old","new",{"foo","bar"}) .. " -> name.new")
+-- print("8 " .. file.addsuffix("name.old","new",{"old","bar"}) .. " -> name.old")
+
+local suffix = period * (1-period-slashes)^1 * -1
+local pattern = Cs((1-suffix)^0)
+
+function file.replacesuffix(name,suffix)
+ if name and suffix and suffix ~= "" then
+ return lpegmatch(pattern,name) .. "." .. suffix
+ else
+ return name
end
- pth = gsub(pth,trick_2,"")
- return (gsub(pth,"//+","/"))
end
---~ print(file.join("//","/y"))
---~ print(file.join("/","/y"))
---~ print(file.join("","/y"))
---~ print(file.join("/x/","/y"))
---~ print(file.join("x/","/y"))
---~ print(file.join("http://","/y"))
---~ print(file.join("http://a","/y"))
---~ print(file.join("http:///a","/y"))
---~ print(file.join("//nas-1","/y"))
+--
+
+local reslasher = lpeg.replacer(P("\\"),"/")
+
+function file.reslash(str)
+ return str and lpegmatch(reslasher,str)
+end
-- We should be able to use:
--
+-- local writable = P(1) * P("w") * Cc(true)
+--
-- function file.is_writable(name)
--- local a = attributes(name) or attributes(dirname(name,"."))
--- return a and sub(a.permissions,2,2) == "w"
+-- local a = attributes(name) or attributes(pathpart(name,"."))
+-- return a and lpegmatch(writable,a.permissions) or false
-- end
--
--- But after some testing Taco and I came up with:
+-- But after some testing Taco and I came up with the more robust
+-- variant:
function file.is_writable(name)
- if lfs.isdir(name) then
+ if not name then
+ -- error
+ elseif lfs.isdir(name) then
name = name .. "/m_t_x_t_e_s_t.tmp"
local f = io.open(name,"wb")
if f then
@@ -190,77 +321,108 @@ function file.is_writable(name)
return false
end
+local readable = P("r") * Cc(true)
+
function file.is_readable(name)
- local a = attributes(name)
- return a and sub(a.permissions,1,1) == "r"
+ if name then
+ local a = attributes(name)
+ return a and lpegmatch(readable,a.permissions) or false
+ else
+ return false
+ end
end
file.isreadable = file.is_readable -- depricated
file.iswritable = file.is_writable -- depricated
function file.size(name)
- local a = attributes(name)
- return a and a.size or 0
+ if name then
+ local a = attributes(name)
+ return a and a.size or 0
+ else
+ return 0
+ end
end
--- todo: lpeg \\ / .. does not save much
-
-local checkedsplit = string.checkedsplit
-
-function file.splitpath(str,separator) -- string
- str = gsub(str,"\\","/")
- return checkedsplit(str,separator or io.pathseparator)
+function file.splitpath(str,separator) -- string .. reslash is a bonus (we could do a direct split)
+ return str and checkedsplit(lpegmatch(reslasher,str),separator or io.pathseparator)
end
function file.joinpath(tab,separator) -- table
- return concat(tab,separator or io.pathseparator) -- can have trailing //
+ return tab and concat(tab,separator or io.pathseparator) -- can have trailing //
end
--- we can hash them weakly
-
---~ function file.collapsepath(str) -- fails on b.c/..
---~ str = gsub(str,"\\","/")
---~ if find(str,"/") then
---~ str = gsub(str,"^%./",(gsub(getcurrentdir(),"\\","/")) .. "/") -- ./xx in qualified
---~ str = gsub(str,"/%./","/")
---~ local n, m = 1, 1
---~ while n > 0 or m > 0 do
---~ str, n = gsub(str,"[^/%.]+/%.%.$","")
---~ str, m = gsub(str,"[^/%.]+/%.%./","")
---~ end
---~ str = gsub(str,"([^/])/$","%1")
---~ -- str = gsub(str,"^%./","") -- ./xx in qualified
---~ str = gsub(str,"/%.$","")
---~ end
---~ if str == "" then str = "." end
---~ return str
---~ end
---~
---~ The previous one fails on "a.b/c" so Taco came up with a split based
---~ variant. After some skyping we got it sort of compatible with the old
---~ one. After that the anchoring to currentdir was added in a better way.
---~ Of course there are some optimizations too. Finally we had to deal with
---~ windows drive prefixes and things like sys://.
+local stripper = Cs(P(fwslash)^0/"" * reslasher)
+local isnetwork = fwslash * fwslash * (1-fwslash) + (1-fwslash-colon)^1 * colon
+local isroot = fwslash^1 * -1
+local hasroot = fwslash^1
+
+local deslasher = lpeg.replacer(S("\\/")^1,"/")
+
+-- If we have a network or prefix then there is a change that we end up with two
+-- // in the middle ... we could prevent this if we (1) expand prefixes: and (2)
+-- split and rebuild as url. Of course we could assume no network paths (which
+-- makes sense) adn assume either mapped drives (windows) or mounts (unix) but
+-- then we still have to deal with urls ... anyhow, multiple // are never a real
+-- problem but just ugly.
+
+function file.join(...)
+ local lst = { ... }
+ local one = lst[1]
+ if lpegmatch(isnetwork,one) then
+ local two = lpegmatch(deslasher,concat(lst,"/",2))
+ return one .. "/" .. two
+ elseif lpegmatch(isroot,one) then
+ local two = lpegmatch(deslasher,concat(lst,"/",2))
+ if lpegmatch(hasroot,two) then
+ return two
+ else
+ return "/" .. two
+ end
+ elseif one == "" then
+ return lpegmatch(stripper,concat(lst,"/",2))
+ else
+ return lpegmatch(deslasher,concat(lst,"/"))
+ end
+end
+
+-- print(file.join("c:/whatever","name"))
+-- print(file.join("//","/y"))
+-- print(file.join("/","/y"))
+-- print(file.join("","/y"))
+-- print(file.join("/x/","/y"))
+-- print(file.join("x/","/y"))
+-- print(file.join("http://","/y"))
+-- print(file.join("http://a","/y"))
+-- print(file.join("http:///a","/y"))
+-- print(file.join("//nas-1","/y"))
+
+-- The previous one fails on "a.b/c" so Taco came up with a split based
+-- variant. After some skyping we got it sort of compatible with the old
+-- one. After that the anchoring to currentdir was added in a better way.
+-- Of course there are some optimizations too. Finally we had to deal with
+-- windows drive prefixes and things like sys://. Eventually gsubs and
+-- finds were replaced by lpegs.
+
+local drivespec = R("az","AZ")^1 * colon
+local anchors = fwslash + drivespec
+local untouched = periods + (1-period)^1 * P(-1)
+local splitstarter = (Cs(drivespec * (bwslash/"/" + fwslash)^0) + Cc(false)) * Ct(lpeg.splitat(S("/\\")^1))
+local absolute = fwslash
function file.collapsepath(str,anchor)
- if anchor and not find(str,"^/") and not find(str,"^%a:") then
+ if not str then
+ return
+ end
+ if anchor and not lpegmatch(anchors,str) then
str = getcurrentdir() .. "/" .. str
end
if str == "" or str =="." then
return "."
- elseif find(str,"^%.%.") then
- str = gsub(str,"\\","/")
- return str
- elseif not find(str,"%.") then
- str = gsub(str,"\\","/")
- return str
+ elseif lpegmatch(untouched,str) then
+ return lpegmatch(reslasher,str)
end
- str = gsub(str,"\\","/")
- local starter, rest = match(str,"^(%a+:/*)(.-)$")
- if starter then
- str = rest
- end
- local oldelements = checkedsplit(str,"/")
+ local starter, oldelements = lpegmatch(splitstarter,str)
local newelements = { }
local i = #oldelements
while i > 0 do
@@ -290,29 +452,37 @@ function file.collapsepath(str,anchor)
return starter or "."
elseif starter then
return starter .. concat(newelements, '/')
- elseif find(str,"^/") then
+ elseif lpegmatch(absolute,str) then
return "/" .. concat(newelements,'/')
else
return concat(newelements, '/')
end
end
---~ local function test(str)
---~ print(string.format("%-20s %-15s %-15s",str,file.collapsepath(str),file.collapsepath(str,true)))
---~ end
---~ test("a/b.c/d") test("b.c/d") test("b.c/..")
---~ test("/") test("c:/..") test("sys://..")
---~ test("") test("./") test(".") test("..") test("./..") test("../..")
---~ test("a") test("./a") test("/a") test("a/../..")
---~ test("a/./b/..") test("a/aa/../b/bb") test("a/.././././b/..") test("a/./././b/..")
---~ test("a/b/c/../..") test("./a/b/c/../..") test("a/b/c/../..")
+-- local function test(str)
+-- print(string.format("%-20s %-15s %-15s",str,file.collapsepath(str),file.collapsepath(str,true)))
+-- end
+-- test("a/b.c/d") test("b.c/d") test("b.c/..")
+-- test("/") test("c:/..") test("sys://..")
+-- test("") test("./") test(".") test("..") test("./..") test("../..")
+-- test("a") test("./a") test("/a") test("a/../..")
+-- test("a/./b/..") test("a/aa/../b/bb") test("a/.././././b/..") test("a/./././b/..")
+-- test("a/b/c/../..") test("./a/b/c/../..") test("a/b/c/../..")
+
+local validchars = R("az","09","AZ","--","..")
+local pattern_a = lpeg.replacer(1-validchars)
+local pattern_a = Cs((validchars + P(1)/"-")^1)
+local whatever = P("-")^0 / ""
+local pattern_b = Cs(whatever * (1 - whatever * -1)^1)
function file.robustname(str,strict)
- str = gsub(str,"[^%a%d%/%-%.\\]+","-")
- if strict then
- return lower(gsub(str,"^%-*(.-)%-*$","%1"))
- else
- return str
+ if str then
+ str = lpegmatch(pattern_a,str) or str
+ if strict then
+ return lpegmatch(pattern_b,str) or str -- two step is cleaner (less backtracking)
+ else
+ return str
+ end
end
end
@@ -320,105 +490,25 @@ file.readdata = io.loaddata
file.savedata = io.savedata
function file.copy(oldname,newname)
- file.savedata(newname,io.loaddata(oldname))
+ if oldname and newname then
+ local data = io.loaddata(oldname)
+ if data and data ~= "" then
+ file.savedata(newname,data)
+ end
+ end
end
--- lpeg variants, slightly faster, not always
-
---~ local period = P(".")
---~ local slashes = S("\\/")
---~ local noperiod = 1-period
---~ local noslashes = 1-slashes
---~ local name = noperiod^1
-
---~ local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * C(noperiod^1) * -1
-
---~ function file.suffixonly(name)
---~ return lpegmatch(pattern,name) or ""
---~ end
-
---~ local pattern = Cs(((period * noperiod^1 * -1)/"" + 1)^1)
-
---~ function file.removesuffix(name)
---~ return lpegmatch(pattern,name)
---~ end
-
---~ local pattern = (noslashes^0 * slashes)^1 * C(noslashes^1) * -1
-
---~ function file.basename(name)
---~ return lpegmatch(pattern,name) or name
---~ end
-
---~ local pattern = (noslashes^0 * slashes)^1 * Cp() * noslashes^1 * -1
-
---~ function file.dirname(name)
---~ local p = lpegmatch(pattern,name)
---~ if p then
---~ return sub(name,1,p-2)
---~ else
---~ return ""
---~ end
---~ end
-
---~ local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * Cp() * noperiod^1 * -1
-
---~ function file.addsuffix(name, suffix)
---~ local p = lpegmatch(pattern,name)
---~ if p then
---~ return name
---~ else
---~ return name .. "." .. suffix
---~ end
---~ end
-
---~ local pattern = (noslashes^0 * slashes)^0 * (noperiod^1 * period)^1 * Cp() * noperiod^1 * -1
-
---~ function file.replacesuffix(name,suffix)
---~ local p = lpegmatch(pattern,name)
---~ if p then
---~ return sub(name,1,p-2) .. "." .. suffix
---~ else
---~ return name .. "." .. suffix
---~ end
---~ end
-
---~ local pattern = (noslashes^0 * slashes)^0 * Cp() * ((noperiod^1 * period)^1 * Cp() + P(true)) * noperiod^1 * -1
-
---~ function file.nameonly(name)
---~ local a, b = lpegmatch(pattern,name)
---~ if b then
---~ return sub(name,a,b-2)
---~ elseif a then
---~ return sub(name,a)
---~ else
---~ return name
---~ end
---~ end
-
---~ local test = file.suffixonly
---~ local test = file.basename
---~ local test = file.dirname
---~ local test = file.addsuffix
---~ local test = file.replacesuffix
---~ local test = file.nameonly
-
---~ print(1,test("./a/b/c/abd.def.xxx","!!!"))
---~ print(2,test("./../b/c/abd.def.xxx","!!!"))
---~ print(3,test("a/b/c/abd.def.xxx","!!!"))
---~ print(4,test("a/b/c/def.xxx","!!!"))
---~ print(5,test("a/b/c/def","!!!"))
---~ print(6,test("def","!!!"))
---~ print(7,test("def.xxx","!!!"))
-
---~ local tim = os.clock() for i=1,250000 do local ext = test("abd.def.xxx","!!!") end print(os.clock()-tim)
-
-- also rewrite previous
local letter = R("az","AZ") + S("_-+")
local separator = P("://")
-local qualified = P(".")^0 * P("/") + letter*P(":") + letter^1*separator + letter^1 * P("/")
-local rootbased = P("/") + letter*P(":")
+local qualified = period^0 * fwslash
+ + letter * colon
+ + letter^1 * separator
+ + letter^1 * fwslash
+local rootbased = fwslash
+ + letter * colon
lpeg.patterns.qualified = qualified
lpeg.patterns.rootbased = rootbased
@@ -426,68 +516,13 @@ lpeg.patterns.rootbased = rootbased
-- ./name ../name /name c: :// name/name
function file.is_qualified_path(filename)
- return lpegmatch(qualified,filename) ~= nil
+ return filename and lpegmatch(qualified,filename) ~= nil
end
function file.is_rootbased_path(filename)
- return lpegmatch(rootbased,filename) ~= nil
+ return filename and lpegmatch(rootbased,filename) ~= nil
end
--- actually these are schemes
-
-local slash = S("\\/")
-local period = P(".")
-local drive = C(R("az","AZ")) * P(":")
-local path = C(((1-slash)^0 * slash)^0)
-local suffix = period * C(P(1-period)^0 * P(-1))
-local base = C((1-suffix)^0)
-local rest = C(P(1)^0)
-
-drive = drive + Cc("")
-path = path + Cc("")
-base = base + Cc("")
-suffix = suffix + Cc("")
-
-local pattern_a = drive * path * base * suffix
-local pattern_b = path * base * suffix
-local pattern_c = C(drive * path) * C(base * suffix) -- trick: two extra captures
-local pattern_d = path * rest
-
-function file.splitname(str,splitdrive)
- if splitdrive then
- return lpegmatch(pattern_a,str) -- returns drive, path, base, suffix
- else
- return lpegmatch(pattern_b,str) -- returns path, base, suffix
- end
-end
-
-function file.splitbase(str)
- return lpegmatch(pattern_d,str) -- returns path, base+suffix
-end
-
-function file.nametotable(str,splitdrive) -- returns table
- local path, drive, subpath, name, base, suffix = lpegmatch(pattern_c,str)
- if splitdrive then
- return {
- path = path,
- drive = drive,
- subpath = subpath,
- name = name,
- base = base,
- suffix = suffix,
- }
- else
- return {
- path = path,
- name = name,
- base = base,
- suffix = suffix,
- }
- end
-end
-
--- print(file.splitbase("a/b/c.txt"))
-
-- function test(t) for k, v in next, t do print(v, "=>", file.splitname(v)) end end
--
-- test { "c:", "c:/aa", "c:/aa/bb", "c:/aa/bb/cc", "c:/aa/bb/cc.dd", "c:/aa/bb/cc.dd.ee" }
@@ -495,18 +530,35 @@ end
-- test { "/aa", "/aa/bb", "/aa/bb/cc", "/aa/bb/cc.dd", "/aa/bb/cc.dd.ee" }
-- test { "aa", "aa/bb", "aa/bb/cc", "aa/bb/cc.dd", "aa/bb/cc.dd.ee" }
---~ -- todo:
---~
---~ if os.type == "windows" then
---~ local currentdir = getcurrentdir
---~ function getcurrentdir()
---~ return (gsub(currentdir(),"\\","/"))
---~ end
---~ end
+-- -- maybe:
+--
+-- if os.type == "windows" then
+-- local currentdir = getcurrentdir
+-- function getcurrentdir()
+-- return lpegmatch(reslasher,currentdir())
+-- end
+-- end
-- for myself:
function file.strip(name,dir)
- local b, a = match(name,"^(.-)" .. dir .. "(.*)$")
- return a ~= "" and a or name
+ if name then
+ local b, a = match(name,"^(.-)" .. dir .. "(.*)$")
+ return a ~= "" and a or name
+ end
end
+
+-- local debuglist = {
+-- "pathpart", "basename", "nameonly", "suffixonly", "suffix", "dirname", "extname",
+-- "addsuffix", "removesuffix", "replacesuffix", "join",
+-- "strip","collapsepath", "joinpath", "splitpath",
+-- }
+
+-- for i=1,#debuglist do
+-- local name = debuglist[i]
+-- local f = file[name]
+-- file[name] = function(...)
+-- print(name,f(...))
+-- return f(...)
+-- end
+-- end