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added the ability to seek and read files line by line

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This commit is contained in:
Izaya 2019-07-18 13:49:34 +10:00
parent 77c28adefa
commit 8a880406bc
1 changed files with 15 additions and 1 deletions
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16
module/fs.lua
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@ -29,8 +29,19 @@ for k,v in pairs({"makeDirectory","exists","isDirectory","list","lastModified","
end
local function fread(self,length)
length = length or "*l"
if length == "*a" then
length = math.huge
elseif length == "*l" then
local rstr, lstr = "", ""
while true do
lstr = fs.mounts[self.fs].read(self.fid,1)
if lstr == "\n" or not lstr then
break
end
rstr = rstr .. lstr
end
return rstr
end
if type(length) == "number" then
local rstr, lstr = "", ""
@ -45,6 +56,9 @@ end
local function fwrite(self,data)
fs.mounts[self.fs].write(self.fid,data)
end
local function fseek(self,dist)
fs.mounts[self.fs].seek(self.fid,dist)
end
local function fclose(self)
fs.mounts[self.fs].close(self.fid)
end
@ -55,7 +69,7 @@ function fs.open(path,mode) -- opens file *path* with mode *mode*
if not fs.mounts[fsi] then return false end
local fid = fs.mounts[fsi].open(path,mode)
if fid then
local fobj = {["fs"]=fsi,["fid"]=fid,["close"]=fclose}
local fobj = {["fs"]=fsi,["fid"]=fid,["seek"]=fseek,["close"]=fclose}
if mode:find("r") then
fobj.read = fread
end