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local env = require 'matcher.env'
local mt = {}
mt.__index = mt
function mt:getVar(key, source)
if key == nil then
return nil
end
local var = self.env.var[key]
or self:getField(self.env.var._ENV, key, source) -- 这里不需要用getVar来递归获取_ENV
if not var then
var = self:addField(self:getVar '_ENV', key, source)
end
if var and var.meta then
var = var.meta
end
return var
end
function mt:addInfo(obj, type, source)
if not obj then
return nil
end
obj[#obj+1] = {
type = type,
source = source,
}
return obj
end
function mt:createVar(type, key, source)
local var = {
type = type,
key = key,
source = source,
childs = {},
}
self.results.vars[#self.results.vars+1] = var
return var
end
function mt:createLabel(key)
local lbl = {
key = key,
type = 'label',
}
self.results.labels[#self.results.labels+1] = lbl
return lbl
end
function mt:createDots()
local dots = {
type = 'dots',
}
self.results.dots[#self.results.dots+1] = dots
return dots
end
function mt:createLib(name)
local lib = {
name = name,
type = 'lib',
childs = {},
}
return lib
end
function mt:createLocal(key, source, var)
if key == nil then
return nil
end
if not var then
var = self:createVar('local', key, source)
self:addInfo(var, 'local', source)
end
local old = self.env.var[key]
if old then
local shadow = old.shadow
if not shadow then
shadow = { old }
old.shadow = shadow
end
var.shadow = shadow
shadow[#shadow+1] = var
end
self.env.var[key] = var
return var
end
function mt:addField(parent, key, source)
if parent == nil or key == nil then
return nil
end
assert(source)
local var = parent.childs[key]
if not var then
var = self:createVar('field', key, source)
parent.childs[key] = var
var.parent = parent
end
return var
end
function mt:getField(parent, key, source)
if parent == nil or key == nil then
return nil
end
local var
if parent.childs then
var = parent.childs[key]
end
if not var and source then
var = self:addField(parent, key, source)
end
return var
end
function mt:isGlobal(var)
if var.type ~= 'field' then
return false
end
if not var.parent then
return false
end
return var.parent.key == '_ENV' or var.parent.key == '_G'
end
function mt:getApi(func)
if not func then
return nil
end
func = func.value or func
if self:isGlobal(func) then
return func.key
end
return nil
end
function mt:checkName(name)
local var = self:getVar(name[1], name)
self:addInfo(var, 'get', name)
return var
end
function mt:checkDots(source)
local dots = self.env.dots
if not dots then
return
end
self:addInfo(dots, 'get', source)
end
function mt:fixCallAsSetMetaTable(results)
local obj = results[1]
local metatable = results[2]
if metatable then
local index = self:getField(metatable, '__index')
if obj then
self:setMeta(obj, index)
return obj
else
return index
end
else
return obj
end
end
function mt:fixCallAsRequire(results)
local libname = results[1]
if not libname then
return
end
libname = libname.value or libname
if libname.type ~= 'string' then
return
end
return self:createLib(libname.string)
end
function mt:searchCall(call, func, lastobj)
local results = {}
for i, exp in ipairs(call) do
results[i] = self:searchExp(exp)
end
if lastobj then
table.insert(self.results.calls, {
call = call,
lastobj = lastobj,
})
end
local api = self:getApi(func)
if api == 'setmetatable' then
return self:fixCallAsSetMetaTable(results)
end
if api == 'require' then
return self:fixCallAsRequire(results)
end
return nil
end
function mt:searchSimple(simple)
local name = simple[1]
local var
if name.type == 'name' then
var = self:getVar(name[1], name)
end
if name.type == 'string' then
var = self:getString(name)
end
self:searchExp(simple[1])
for i = 2, #simple do
local obj = simple[i]
local tp = obj.type
if tp == 'call' then
var = self:searchCall(obj, var, simple[i-1])
elseif tp == ':' then
elseif tp == 'name' then
if obj.index then
self:checkName(obj)
var = nil
else
var = self:getField(var, obj[1], obj)
self:addInfo(var, 'get', obj)
end
elseif obj.index and (obj.type == 'string' or obj.type == 'number' or obj.type == 'boolean') then
var = self:getField(var, obj[1], obj)
self:addInfo(var, 'get', obj)
else
self:searchExp(obj)
var = nil
end
end
return var
end
function mt:searchBinary(exp)
self:searchExp(exp[1])
self:searchExp(exp[2])
end
function mt:searchUnary(exp)
self:searchExp(exp[1])
end
function mt:searchTable(exp)
local tbl = {
type = 'table',
childs = {},
}
for _, obj in ipairs(exp) do
if obj.type == 'pair' then
local key, value = obj[1], obj[2]
local res = self:searchExp(value)
local var = self:addField(tbl, key[1], key)
self:setValue(var, res)
self:addInfo(var, 'set', key)
else
self:searchExp(obj)
end
end
return tbl
end
function mt:getString(exp)
return {
type = 'string',
string = exp[1],
childs = {},
}
end
function mt:searchExp(exp)
local tp = exp.type
if tp == 'nil' then
elseif tp == 'string' then
return self:getString(exp)
elseif tp == 'boolean' then
elseif tp == 'number' then
elseif tp == 'name' then
return self:checkName(exp)
elseif tp == 'simple' then
return self:searchSimple(exp)
elseif tp == 'binary' then
self:searchBinary(exp)
elseif tp == 'unary' then
self:searchUnary(exp)
elseif tp == '...' then
self:checkDots(exp)
elseif tp == 'function' then
self:searchFunction(exp)
elseif tp == 'table' then
return self:searchTable(exp)
end
return nil
end
function mt:searchReturn(action)
for _, exp in ipairs(action) do
self:searchExp(exp)
end
end
function mt:setValue(var, value)
if not var or not value then
return
end
var.value = value.value or value
if value.childs then
var.childs = value.childs
for _, child in pairs(value.childs) do
child.parent = var
end
end
end
function mt:setMeta(var, meta)
if not var or not meta then
return
end
var.childs.meta = meta
meta.childs.meta = var
end
function mt:markSimple(simple)
local name = simple[1]
local var
if name.type == 'name' then
var = self:getVar(name[1], name)
end
if name.type == 'string' then
var = self:getString(name)
end
self:searchExp(simple[1])
for i = 2, #simple do
local obj = simple[i]
local tp = obj.type
if tp == 'call' then
var = self:searchCall(obj, var, simple[i-1])
elseif tp == ':' then
var = self:createLocal('self', simple[i-1], self:getVar(simple[i-1][1]))
var.disableRename = true
elseif tp == 'name' then
if obj.index then
self:checkName(obj)
var = nil
else
if i == #simple then
var = self:addField(var, obj[1], obj)
self:addInfo(var, 'set', obj)
else
var = self:getField(var, obj[1], obj)
self:addInfo(var, 'get', obj)
end
end
elseif obj.index and (obj.type == 'string' or obj.type == 'number' or obj.type == 'boolean') then
if i == #simple then
var = self:addField(var, obj[1], obj)
self:addInfo(var, 'set', obj)
else
var = self:getField(var, obj[1], obj)
self:addInfo(var, 'get', obj)
end
else
self:searchExp(obj)
var = nil
end
end
return var
end
function mt:markSet(simple, value)
if simple.type == 'name' then
local var = self:getVar(simple[1], simple)
self:addInfo(var, 'set', simple)
self:setValue(var, value)
else
local var = self:markSimple(simple)
self:setValue(var, value)
end
end
function mt:markLocal(name, value)
if name.type == 'name' then
local str = name[1]
-- 创建一个局部变量
local var = self:createLocal(str, name)
self:setValue(var, value)
elseif name.type == '...' then
local dots = self:createDots()
self:addInfo(dots, 'local', name)
self.env.dots = dots
elseif name.type == ':' then
-- 创建一个局部变量
self:createLocal('self', name)
end
end
function mt:forList(list, callback)
if not list then
return
end
if list.type == 'list' then
for i = 1, #list do
callback(list[i])
end
else
callback(list)
end
end
function mt:markSets(action)
local keys = action[1]
local values = action[2]
local results = {}
-- 要先计算赋值
local i = 0
self:forList(values, function (value)
i = i + 1
results[i] = self:searchExp(value)
end)
local i = 0
self:forList(keys, function (key)
i = i + 1
self:markSet(key, results[i])
end)
end
function mt:markLocals(action)
local keys = action[1]
local values = action[2]
local results = {}
-- 要先计算赋值
local i = 0
self:forList(values, function (value)
i = i + 1
results[i] = self:searchExp(value)
end)
local i = 0
self:forList(keys, function (key)
i = i + 1
self:markLocal(key, results[i])
end)
end
function mt:searchIfs(action)
for _, block in ipairs(action) do
self.env:push()
if block.filter then
self:searchExp(block.filter)
end
self:searchActions(block)
self.env:pop()
end
end
function mt:searchLoop(action)
self.env:push()
self:markLocal(action.arg)
self:searchExp(action.min)
self:searchExp(action.max)
if action.step then
self:searchExp(action.step)
end
self:searchActions(action)
self.env:pop()
end
function mt:searchIn(action)
self:forList(action.exp, function (exp)
self:searchExp(exp)
end)
self.env:push()
self:forList(action.arg, function (arg)
self:markLocal(arg)
end)
self:searchActions(action)
self.env:pop()
end
function mt:searchDo(action)
self.env:push()
self:searchActions(action)
self.env:pop()
end
function mt:searchWhile(action)
self:searchExp(action.filter)
self.env:push()
self:searchActions(action)
self.env:pop()
end
function mt:searchRepeat(action)
self.env:push()
self:searchActions(action)
self:searchExp(action.filter)
self.env:pop()
end
function mt:searchFunction(func)
self.env:push()
self.env:cut 'dots'
self.env.label = {}
if func.name then
self:markSet(func.name)
end
self:forList(func.arg, function (arg)
self:markLocal(arg)
end)
self:searchActions(func)
self.env:pop()
end
function mt:searchLocalFunction(func)
if func.name then
self:markLocal(func.name)
end
self.env:push()
self:forList(func.arg, function (arg)
self:markLocal(arg)
end)
self:searchActions(func)
self.env:pop()
end
function mt:markLabel(label)
local str = label[1]
if not self.env.label[str] then
self.env.label[str] = self:createLabel(str)
end
self:addInfo(self.env.label[str], 'set', label)
end
function mt:searchGoTo(obj)
local str = obj[1]
if not self.env.label[str] then
self.env.label[str] = self:createLabel(str)
end
self:addInfo(self.env.label[str], 'goto', obj)
end
function mt:searchAction(action)
local tp = action.type
if tp == 'do' then
self:searchDo(action)
elseif tp == 'break' then
elseif tp == 'return' then
self:searchReturn(action)
elseif tp == 'label' then
self:markLabel(action)
elseif tp == 'goto' then
self:searchGoTo(action)
elseif tp == 'set' then
self:markSets(action)
elseif tp == 'local' then
self:markLocals(action)
elseif tp == 'simple' then
self:searchSimple(action)
elseif tp == 'if' then
self:searchIfs(action)
elseif tp == 'loop' then
self:searchLoop(action)
elseif tp == 'in' then
self:searchIn(action)
elseif tp == 'while' then
self:searchWhile(action)
elseif tp == 'repeat' then
self:searchRepeat(action)
elseif tp == 'function' then
self:searchFunction(action)
elseif tp == 'localfunction' then
self:searchLocalFunction(action)
end
end
function mt:searchActions(actions)
for _, action in ipairs(actions) do
self:searchAction(action)
end
return nil
end
return function (ast)
if not ast then
return nil
end
local searcher = setmetatable({
env = env {
var = {},
usable = {}
},
results = {
labels = {},
vars = {},
dots = {},
calls = {},
}
}, mt)
searcher.env.label = {}
searcher:createLocal('_ENV', { start = -1, finish = -1 })
searcher:searchActions(ast)
return searcher.results
end
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