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mirror of https://github.com/Adorable-Catgirl/LuaComp.git synced 2024-12-23 08:48:05 +11:00
This commit is contained in:
sam 2022-02-14 12:14:17 -05:00
parent bc5e11b23f
commit 5b8a90da87
3 changed files with 8 additions and 424 deletions

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@ -1,286 +0,0 @@
--[[
ast.lua - Generates a structure for use in preprocessing.
]]
-- This Source Code Form is subject to the terms of the Mozilla Public
-- License, v. 2.0. If a copy of the MPL was not distributed with this
-- file, You can obtain one at https://mozilla.org/MPL/2.0/.
local function nextc(f, c)
c = c or 1
return f:read(c)
end
local function peek(f, c)
c = c or 1
local z = f:read(c)
f:seek("cur", -c)
return z
end
local function skip(f, c)
c = c or 1
return f:seek("cur", c)
end
local ws = {
["\t"] = true,
[" "] = true
}
local function parse_hex(f)
local lc = " "
local hex = ""
while (48 <= lc:byte() and lc:byte() <= 57) or (97 <= lc:byte() and lc:byte() <= 102) or (65 <= lc:byte() and lc:byte() <= 70) and lc do
lc = nextc(f)
if (48 <= lc:byte() and lc:byte()) <= 57 or (97 <= lc:byte() and lc:byte() <= 102) or (65 <= lc:byte() and lc:byte() <= 70) and lc then
hex = hex .. lc
end
end
return tonumber(hex, 16)
end
local function parse_number(f, c)
local lc = " "
local num = c
while 48 <= lc:byte() and lc:byte() <= 57 and lc do
lc = nextc(f)
if (48 <= lc:byte() and lc:byte() <= 57) and lc then
num = num .. lc
end
end
return tonumber(hex, 10)
end
local esct = {
["t"] = "\t",
["n"] = "\n",
["r"] = "\r",
["\\"] = "\\\\"
}
for i=0, 9 do
esct[tostring(i)] = string.char(i)
end
local function parse_dblquote(f)
local val = ""
while peek(f) ~= "\"" do
local c = nextc(f)
if (peek(f) == "\n" or peek(f) == "\r") then
return nil, "Unexpected end of line"
elseif (not peek(f)) then
return nil, "Unexpected end of file"
end
if (c == "\\") then
if (esct[peek(f)]) then
c = esct[peek(f)]
skip(f)
else
c = nextc(f)
end
end
val = val .. c
end
skip(f)
return val
end
local function parse_snglquote(f)
local val = ""
while peek(f) ~= "\'" do
local c = nextc(f)
if (peek(f) == "\n" or peek(f) == "\r") then
return nil, "Unexpected end of line"
elseif (not peek(f)) then
return nil, "Unexpected end of file"
end
if (c == "\\") then
if (esct[peek(f)]) then
c = esct[peek(f)]
skip(f)
else
c = nextc(f)
end
end
val = val .. c
end
skip(f)
return val
end
local function parse_envarg(f)
local val = ""
while peek(f) ~= ")" do
if (peek(f) == "\n" or peek(f) == "\r") then
return nil, "Unexpected end of line"
elseif (not peek(f)) then
return nil, "Unexpected end of file"
end
val = val .. nextc(f)
end
skip(f)
return val
end
local function parse_directive(f)
local lc = "_"
local name = ""
local args = {}
local carg = ""
while not ws[lc] do
lc = nextc(f)
if (lc == "\n" or lc == "\r") then
if (lc == "\r" and peek(f) == "\n") then skip(f) end
return {type="directive", name=name}
elseif not ws[lc] then
name = name .. lc
end
end
while true do
lc = nextc(f)
if (lc == "\n" or lc == "\r") then
if (lc == "\r" and peek(f) == "\n") then skip(f) end
return {type="directive", name=name, args=args}
elseif lc == "0" and peek(f) == "x" then
skip(f)
local val = parse_hex(f)
args[#args+1] = val
elseif 48 <= lc:byte() and lc:byte() <= 57 then
local val = parse_number(f, lc)
args[#args+1] = val
elseif lc == "\"" then
local val, e = parse_dblquote(f)
if not val then return val, e end
args[#args+1] = val
elseif lc == "\'" then
local val, e = parse_snglquote(f)
if not val then return val, e end
args[#args+1] = val
elseif lc == "$" and peek(f) == "(" then
skip(f)
local val = parse_envarg(f)
if not os.getenv(val) then return nil, "Enviroment variable `"..val.."' does not exist." end
args[#args+1] = os.getenv(val)
elseif lc == "@" and peek(f, 2) == "[{" then
skip(f, 2)
local val = ""
while peek(f, 2) ~= "}]" do
val = val .. nextc(f)
end
args[#args+1] = {type="lua_var", val}
skip(f, 2)
elseif not ws[lc] then
return nil, "Syntax error"
end
end
end
local function mkast(f, n)
io.stderr:write("PROC\t",n,"\n")
local lc = " "
local lpos = 1
local ilpos = 1
local tree = {}
local code = ""
local branches = {}
local function add_code()
tree[#tree+1] = {type="code", data=code, file=n, line=lpos}
code = ""
end
local function parse_error(e)
io.stderr:write("ERROR:"..n..":"..lpos..": "..e.."\n")
os.exit(1)
end
while lc and lc ~= "" do
lc = nextc(f)
if (lc == "-" and ilpos == 1) then
if (peek(f, 2) == "-#") then --Directive
add_code()
skip(f, 2)
local d, r = parse_directive(f)
if not d then
parse_error(r)
end
d.line = lpos
d.file = n
lpos = lpos+1
tree[#tree+1] = d
else
code = code .. lc
ilpos = ilpos+1
end
elseif (lc == "/" and ilpos == 1) then
if (peek(f, 2) == "/#") then --Directive
add_code()
skip(f, 2)
local d, r = parse_directive(f)
if not d then
parse_error(r)
end
d.line = lpos
d.file = n
lpos = lpos+1
tree[#tree+1] = d
else
code = code .. lc
ilpos = ilpos+1
end
elseif (lc == "$" and peek(f) == "(") then
add_code()
skip(f)
local val, e = parse_envarg(f)
if not val then
parse_error(e)
end
tree[#tree+1] = {type="envvar", var=val, file=n, line=lpos}
elseif (lc == "@" and peek(f, 2) == "[[") then
add_code()
skip(f, 2)
local val = ""
while peek(f, 2) ~= "]]" do
val = val .. nextc(f)
end
tree[#tree+1] = {type="lua", code=val, file=n, line=lpos}
skip(f, 2)
elseif (lc == "@" and peek(f, 2) == "[{") then
add_code()
skip(f, 2)
local val = ""
while peek(f, 2) ~= "}]" do
val = val .. nextc(f)
end
tree[#tree+1] = {type="lua_r", code=val, file=n, line=lpos}
skip(f, 2)
elseif (lc == "$" and peek(f, 2) == "[[") then
add_code()
skip(f, 2)
local val = ""
while peek(f, 2) ~= "]]" do
val = val .. nextc(f)
end
tree[#tree+1] = {type="shell", code=val, file=n, line=lpos}
skip(f, 2)
elseif (lc == "$" and peek(f, 2) == "[{") then
add_code()
skip(f, 2)
local val = ""
while peek(f, 2) ~= "}]" do
val = val .. nextc(f)
end
tree[#tree+1] = {type="shell_r", code=val, file=n, line=lpos}
skip(f, 2)
elseif (lc == "\r" or lc == "\n") then
if (lc == "\r" and peek(f) == "\n") then
skip(f)
end
lpos = lpos+1
ilpos = 1
code = code .. "\n"
else
code = code .. (lc or "")
ilpos = ilpos+1
end
end
add_code()
return tree
end

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@ -2,6 +2,14 @@
-- License, v. 2.0. If a copy of the MPL was not distributed with this
-- file, You can obtain one at https://mozilla.org/MPL/2.0/.
local pragma_hooks = {
include_once = function(env, value)
if value and value ~= 0 then
end
end
}
function directives.pragma(env, key, value)
if not env.pragmas[key] then
return nil, "unknown pragma "..key

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@ -1,138 +0,0 @@
--[[
generator.lua - Generates the code.
]]
-- This Source Code Form is subject to the terms of the Mozilla Public
-- License, v. 2.0. If a copy of the MPL was not distributed with this
-- file, You can obtain one at https://mozilla.org/MPL/2.0/.
local function lua_escape(code)
return code:gsub("\\", "\\\\"):gsub("\"", "\\\""):gsub("\n", "\\n")
end
local function shell_escape(code)
return code:gsub("\\%[", "[")
end
local function svar_escape(code)
return code:gsub("\"", "\\\""):gsub("\'", "\\\'"):gsub("`", "\\`")
end
local directives = {}
local function generate(ast, gencode)
local lua_code = ""
for i=1, #ast do
local leaf = ast[i]
if (leaf.type == "lua") then
lua_code = lua_code .. leaf.code
elseif (leaf.type == "directive") then
local stargs = {}
for i=1, #leaf.args do
local arg = leaf.args[i]
if (type(arg) == "string") then
stargs[i] = "\""..lua_escape(arg).."\""
elseif (type(arg) == "number") then
stargs[i] = tostring(arg)
elseif (type(arg) == "table" and arg.type=="lua_var") then
stargs[i] = arg[1]
end
end
lua_code = lua_code .. "call_directive(\""..leaf.file..":"..tostring(leaf.line).."\",\""..leaf.name.."\","..table.concat(stargs, ",")..")"
elseif (leaf.type == "envvar") then
lua_code = lua_code .. "put_env(\""..leaf.file..":"..tostring(leaf.line).."\",\""..leaf.var.."\")"
elseif (leaf.type == "code") then
lua_code = lua_code .. "put_code(\""..leaf.file..":"..tostring(leaf.line).."\",\"" .. lua_escape(leaf.data) .. "\")"
elseif (leaf.type == "lua_r") then
lua_code = lua_code .. "put_code(\""..leaf.file..":"..tostring(leaf.line).."\",tostring("..leaf.code.."))"
elseif (leaf.type == "shell") then
lua_code = lua_code .. "put_shell_out(\""..leaf.file..":"..tostring(leaf.line).."\",\""..lua_escape(leaf.code).."\")"
elseif (leaf.type == "shell_r") then
lua_code = lua_code .. "put_svar(\""..leaf.file..":"..tostring(leaf.line).."\",\""..leaf.code.."\")"
else
io.stderr:write("ERROR: Internal catastrophic failure, unknown type "..leaf.type.."\n")
os.exit(1)
end
lua_code = lua_code .. "\n"
end
local env = {code = ""}
local function run_away_screaming(fpos, err)
io.stdout:write("ERROR: "..fpos..": "..err.."\n")
os.exit(1)
end
local function bitch(fpos, err)
io.stdout:write("WARNING: "..fpos..": "..err.."\n")
end
local function call_directive(fpos, dname, ...)
if (not directives[dname]) then
run_away_screaming(fpos, "Invalid directive name `"..dname.."'")
end
local r, er = directives[dname](env, ...)
if (not r) then
run_away_screaming(fpos, er)
end
end
local function put_env(fpos, evar)
local e = svar.get(evar)
if not e then
run_away_screaming(fpos, "Enviroment variable `"..evar.."' does not exist!")
end
env.code = env.code .. "\""..lua_escape(e).."\""
end
local function put_code(fpos, code)
env.code = env.code .. code --not much that can fail here...
end
local function put_shell_out(fpos, code)
local tname = os.tmpname()
local f = os.tmpname()
local fh = io.open(f, "w")
fh:write(code)
fh:close()
os.execute("chmod +x "..f)
local vars = svar.get_all()
local vstr = ""
for k, v in pairs(vars) do
vstr = vstr .. k.."=".."\""..svar_escape(v).."\" "
end
dprint("Shell", vstr .. f.." "..tname)
local h = io.popen(vstr .. f.." "..tname, "r")
local output = h:read("*a"):gsub("\n$", "")
local ok, sig, code = h:close()
fh = io.open(tname, "r")
local stderr = fh:read("*a"):gsub("\n$", "")
fh:close()
os.remove(f)
os.remove(tname)
if not ok then
run_away_screaming(fpos, "Shell exit code "..code..", SIG_"..sig:upper().."\n"..stderr)
elseif #stderr > 0 then
bitch(fpos, stderr)
end
env.code = env.code .. output
end
local function put_svar(fpos, evar)
local e = svar.get(evar)
if not e then
run_away_screaming(fpos, "Enviroment variable `"..evar.."' does not exist!")
end
env.code = env.code .. e
end
local fenv = {}
for k, v in pairs(_G) do
fenv[k] = v
end
if gencode then
return lua_code
end
fenv._G = fenv
fenv._ENV = fenv
fenv.call_directive = call_directive
fenv.put_code = put_code
fenv.put_env = put_env
fenv.put_svar = put_svar
fenv.put_shell_out = put_shell_out
fenv._GENERATOR=env
local func = assert(load(lua_code, "=(generated code: "..ast.file..")", "t", fenv))
func()
return env.code
end