On Thu, Mar 24, 2022 at 4:51 PM Thijs Schreijer wrote:
This means that reading a Windows based text file, with CRLF as
line endings, the returned lines will have a trailing CR (char 13).
I can not reproduce this problem.
Everything works as expected on Windows.
Here’s my test code:
print(_VERSION)
local CR = string.char(13)
local LF = string.char(10)
local function writefile(name, content)
local f = io.open(name, "w")
f:write(content)
f:close()
end
local function readfile(name, mode)
local f = io.open(name, "r")
while f do
local l = f:read(mode)
if l then
local le = l:gsub(CR, "+CR"):gsub(LF, "+LF")
if le:sub(1,1) == "+" then
le = le:sub(2,-1)
end
print(#l, le)
else
f:close()
f = nil
end
end
end
local lines = { -- "*L" result:
"1234567890"..LF, -- 1 line, 11 bytes
"1234567890"..LF..CR..LF, -- 2 lines, 11 bytes + 2 bytes
"1234567890"..CR..LF, -- 1 line, 12 bytes
"1234567890"..CR..LF..LF, -- 2 lines, 12 bytes + 1 byte
"1234567890" -- 1 line, 10 bytes
}
lines = table.concat(lines)
writefile("test.txt", lines)
for _, mode in ipairs { "*l", "*L" } do
print("\nTesting mode: "..mode)
readfile("test.txt", mode)
end
Result on Mac:
Lua 5.3
Testing mode: *l
10 1234567890
10 1234567890
1 CR
11 1234567890+CR
11 1234567890+CR
0
10 1234567890
Testing mode: *L
11 1234567890+LF
11 1234567890+LF
2 CR+LF
12 1234567890+CR+LF
12 1234567890+CR+LF
1 LF
10 1234567890
Program completed in 0.16 seconds (pid: 86623).
Result on Windows:
Lua 5.3
Testing mode: *l
10 1234567890
10 1234567890
1 CR
11 1234567890+CR
11 1234567890+CR
0
10 1234567890
Testing mode: *L
11 1234567890+LF
11 1234567890+LF
2 CR+LF
12 1234567890+CR+LF
12 1234567890+CR+LF
1 LF
10 1234567890
Program completed in 0.23 seconds (pid: 5044).
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