mirror of
https://git.shadowkat.net/izaya/OC-PsychOS2.git
synced 2024-11-22 03:54:20 -05:00
70 lines
1.9 KiB
Lua
70 lines
1.9 KiB
Lua
local preproc = {}
|
|
preproc.directives = {}
|
|
|
|
function preproc.parsewords(line) -- string -- table -- Returns a table of words from the string *line*, parsing quotes and escapes.
|
|
local rt = {""}
|
|
local escaped, quoted = false, false
|
|
for c in line:gmatch(".") do
|
|
if escaped then
|
|
rt[#rt] = rt[#rt]..c
|
|
elseif c == '"' or c == "'" then
|
|
quoted = not quoted
|
|
elseif c == "\\" then
|
|
escaped = true
|
|
elseif c:match("%s") and not quoted and rt[#rt]:len() > 0 then
|
|
rt[#rt+1] = ""
|
|
else
|
|
rt[#rt] = rt[#rt]..c
|
|
end
|
|
end
|
|
return rt
|
|
end
|
|
|
|
function preproc.line(line) -- string -- -- Returns either a function - which can be called to get lines until it returns nil - or a string from processing *line* using preprocessor directives.
|
|
if line:match("^%-%-#") then
|
|
local directive, args = line:match("^%-%-#(%S+)%s(.+)")
|
|
print(directive,args)
|
|
local args = preproc.parsewords(args)
|
|
if preproc.directives[directive] then
|
|
return preproc.directives[directive](table.unpack(args))
|
|
else
|
|
error("unknown preprocessor directive: "..directive)
|
|
end
|
|
else
|
|
return line
|
|
end
|
|
end
|
|
|
|
function preproc.preproc(...) -- string -- string -- Returns the output from preprocessing the files listed in *...*.
|
|
local tA = {...}
|
|
local output = ""
|
|
for _,fname in ipairs(tA) do
|
|
local f,e = io.open(fname)
|
|
if not f then error("unable to open file "..fname..": "..e) end
|
|
for line in f:lines() do
|
|
local r = preproc.line(line)
|
|
if type(r) == "function" then
|
|
while true do
|
|
local rs = r()
|
|
if not rs then break end
|
|
output = output .. rs .. "\n"
|
|
end
|
|
else
|
|
output = output .. r .. "\n"
|
|
end
|
|
end
|
|
end
|
|
return output
|
|
end
|
|
|
|
preproc.directives.include = preproc.preproc
|
|
|
|
return setmetatable(preproc,{__call=function(_,...)
|
|
local tA = {...}
|
|
local out = table.remove(tA,#tA)
|
|
local f,e = io.open(out,"wb")
|
|
if not f then error("unable to open file "..out..": "..e) end
|
|
f:write(preproc.preproc(table.unpack(tA)))
|
|
f:close()
|
|
end})
|