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|
local util = require 'utility'
local error = error
local type = type
local next = next
local tostring = tostring
local print = print
local ipairs = ipairs
local tableInsert = table.insert
local tableUnpack = table.unpack
local tableRemove = table.remove
local tableMove = table.move
local pairs = pairs
_ENV = nil
local m = {}
local blockTypes = {
['while'] = true,
['in'] = true,
['loop'] = true,
['repeat'] = true,
['do'] = true,
['function'] = true,
['ifblock'] = true,
['elseblock'] = true,
['elseifblock'] = true,
['main'] = true,
}
local breakBlockTypes = {
['while'] = true,
['in'] = true,
['loop'] = true,
['repeat'] = true,
}
m.childMap = {
['main'] = {'#'},
['repeat'] = {'#', 'filter'},
['while'] = {'filter', '#'},
['in'] = {'keys', '#'},
['loop'] = {'loc', 'max', 'step', '#'},
['if'] = {'#'},
['ifblock'] = {'filter', '#'},
['elseifblock'] = {'filter', '#'},
['elseblock'] = {'#'},
['setfield'] = {'node', 'field', 'value'},
['setglobal'] = {'value'},
['local'] = {'attrs', 'value'},
['setlocal'] = {'value'},
['return'] = {'#'},
['do'] = {'#'},
['select'] = {'vararg'},
['table'] = {'#'},
['tableindex'] = {'index', 'value'},
['tablefield'] = {'field', 'value'},
['function'] = {'args', '#'},
['funcargs'] = {'#'},
['setmethod'] = {'node', 'method', 'value'},
['getmethod'] = {'node', 'method'},
['setindex'] = {'node', 'index', 'value'},
['getindex'] = {'node', 'index'},
['paren'] = {'exp'},
['call'] = {'node', 'args'},
['callargs'] = {'#'},
['getfield'] = {'node', 'field'},
['list'] = {'#'},
['binary'] = {1, 2},
['unary'] = {1}
}
m.actionMap = {
['main'] = {'#'},
['repeat'] = {'#'},
['while'] = {'#'},
['in'] = {'#'},
['loop'] = {'#'},
['if'] = {'#'},
['ifblock'] = {'#'},
['elseifblock'] = {'#'},
['elseblock'] = {'#'},
['do'] = {'#'},
['function'] = {'#'},
['funcargs'] = {'#'},
}
--- 是否是字面量
function m.isLiteral(obj)
local tp = obj.type
return tp == 'nil'
or tp == 'boolean'
or tp == 'string'
or tp == 'number'
or tp == 'table'
end
--- 获取字面量
function m.getLiteral(obj)
local tp = obj.type
if tp == 'boolean' then
return obj[1]
elseif tp == 'string' then
return obj[1]
elseif tp == 'number' then
return obj[1]
end
return nil
end
--- 寻找父函数
function m.getParentFunction(obj)
for _ = 1, 1000 do
obj = obj.parent
if not obj then
break
end
local tp = obj.type
if tp == 'function' or tp == 'main' then
return obj
end
end
return nil
end
--- 寻找所在区块
function m.getBlock(obj)
for _ = 1, 1000 do
if not obj then
return nil
end
local tp = obj.type
if blockTypes[tp] then
return obj
end
obj = obj.parent
end
error('guide.getBlock overstack')
end
--- 寻找所在父区块
function m.getParentBlock(obj)
for _ = 1, 1000 do
obj = obj.parent
if not obj then
return nil
end
local tp = obj.type
if blockTypes[tp] then
return obj
end
end
error('guide.getParentBlock overstack')
end
--- 寻找所在可break的父区块
function m.getBreakBlock(obj)
for _ = 1, 1000 do
obj = obj.parent
if not obj then
return nil
end
local tp = obj.type
if breakBlockTypes[tp] then
return obj
end
if tp == 'function' then
return nil
end
end
error('guide.getBreakBlock overstack')
end
--- 寻找根区块
function m.getRoot(obj)
for _ = 1, 1000 do
local parent = obj.parent
if not parent then
return obj
end
obj = parent
end
error('guide.getRoot overstack')
end
--- 寻找函数的不定参数,返回不定参在第几个参数上,以及该参数对象。
--- 如果函数是主函数,则返回`0, nil`。
---@return table
---@return integer
function m.getFunctionVarArgs(func)
if func.type == 'main' then
return 0, nil
end
if func.type ~= 'function' then
return nil, nil
end
local args = func.args
if not args then
return nil, nil
end
for i = 1, #args do
local arg = args[i]
if arg.type == '...' then
return i, arg
end
end
return nil, nil
end
--- 获取指定区块中可见的局部变量
---@param block table
---@param name string {comment = '变量名'}
---@param pos integer {comment = '可见位置'}
function m.getLocal(block, name, pos)
block = m.getBlock(block)
for _ = 1, 1000 do
if not block then
return nil
end
local locals = block.locals
local res
if not locals then
goto CONTINUE
end
for i = 1, #locals do
local loc = locals[i]
if loc.effect > pos then
break
end
if loc[1] == name then
if not res or res.effect < loc.effect then
res = loc
end
end
end
if res then
return res, res
end
::CONTINUE::
block = m.getParentBlock(block)
end
error('guide.getLocal overstack')
end
--- 获取指定区块中所有的可见局部变量名称
function m.getVisibleLocals(block, pos)
local result = {}
m.eachSourceContain(m.getRoot(block), pos, function (source)
local locals = source.locals
if locals then
for i = 1, #locals do
local loc = locals[i]
local name = loc[1]
if loc.effect <= pos then
result[name] = loc
end
end
end
end)
return result
end
--- 获取指定区块中可见的标签
---@param block table
---@param name string {comment = '标签名'}
function m.getLabel(block, name)
block = m.getBlock(block)
for _ = 1, 1000 do
if not block then
return nil
end
local labels = block.labels
if labels then
local label = labels[name]
if label then
return label
end
end
if block.type == 'function' then
return nil
end
block = m.getParentBlock(block)
end
error('guide.getLocal overstack')
end
--- 判断source是否包含offset
function m.isContain(source, offset)
return source.start <= offset and source.finish >= offset - 1
end
--- 判断offset在source的影响范围内
---
--- 主要针对赋值等语句时,key包含value
function m.isInRange(source, offset)
return (source.vstart or source.start) <= offset and (source.range or source.finish) >= offset - 1
end
--- 添加child
function m.addChilds(list, obj, map)
local keys = map[obj.type]
if keys then
for i = 1, #keys do
local key = keys[i]
if key == '#' then
for i = 1, #obj do
list[#list+1] = obj[i]
end
else
list[#list+1] = obj[key]
end
end
end
end
--- 遍历所有包含offset的source
function m.eachSourceContain(ast, offset, callback)
local list = { ast }
local mark = {}
while true do
local len = #list
if len == 0 then
return
end
local obj = list[len]
list[len] = nil
if not mark[obj] then
mark[obj] = true
if m.isInRange(obj, offset) then
if m.isContain(obj, offset) then
local res = callback(obj)
if res ~= nil then
return res
end
end
m.addChilds(list, obj, m.childMap)
end
end
end
end
--- 遍历所有指定类型的source
function m.eachSourceType(ast, type, callback)
local cache = ast.typeCache
if not cache then
cache = {}
ast.typeCache = cache
m.eachSource(ast, function (source)
local tp = source.type
if not tp then
return
end
local myCache = cache[tp]
if not myCache then
myCache = {}
cache[tp] = myCache
end
myCache[#myCache+1] = source
end)
end
local myCache = cache[type]
if not myCache then
return
end
for i = 1, #myCache do
callback(myCache[i])
end
end
--- 遍历所有的source
function m.eachSource(ast, callback)
local list = { ast }
local mark = {}
local index = 1
while true do
local obj = list[index]
if not obj then
return
end
list[index] = false
index = index + 1
if not mark[obj] then
mark[obj] = true
callback(obj)
m.addChilds(list, obj, m.childMap)
end
end
end
--- 获取指定的 special
function m.eachSpecialOf(ast, name, callback)
local root = m.getRoot(ast)
if not root.specials then
return
end
local specials = root.specials[name]
if not specials then
return
end
for i = 1, #specials do
callback(specials[i])
end
end
--- 获取偏移对应的坐标
---@param lines table
---@return integer {name = 'row'}
---@return integer {name = 'col'}
function m.positionOf(lines, offset)
if offset < 1 then
return 0, 0
end
local lastLine = lines[#lines]
if offset > lastLine.finish then
return #lines, lastLine.finish - lastLine.start + 1
end
local min = 1
local max = #lines
for _ = 1, 100 do
if max <= min then
local line = lines[min]
return min, offset - line.start + 1
end
local row = (max - min) // 2 + min
local line = lines[row]
if offset < line.start then
max = row - 1
elseif offset > line.finish then
min = row + 1
else
return row, offset - line.start + 1
end
end
error('Stack overflow!')
end
--- 获取坐标对应的偏移
---@param lines table
---@param row integer
---@param col integer
---@return integer {name = 'offset'}
function m.offsetOf(lines, row, col)
if row < 1 then
return 0
end
if row > #lines then
local lastLine = lines[#lines]
return lastLine.finish
end
local line = lines[row]
local len = line.finish - line.start + 1
if col < 0 then
return line.start
elseif col > len then
return line.finish
else
return line.start + col - 1
end
end
function m.lineContent(lines, text, row)
local line = lines[row]
if not line then
return ''
end
return text:sub(line.start, line.finish)
end
function m.lineRange(lines, row)
local line = lines[row]
if not line then
return 0, 0
end
return line.start, line.finish
end
function m.getNameOfLiteral(obj)
if not obj then
return nil
end
local tp = obj.type
if tp == 'string' then
return obj[1]
end
return nil
end
function m.getName(obj)
local tp = obj.type
if tp == 'getglobal'
or tp == 'setglobal' then
return obj[1]
elseif tp == 'local'
or tp == 'getlocal'
or tp == 'setlocal' then
return obj[1]
elseif tp == 'getfield'
or tp == 'setfield'
or tp == 'tablefield' then
return obj.field[1]
elseif tp == 'getmethod'
or tp == 'setmethod' then
return obj.method[1]
elseif tp == 'getindex'
or tp == 'setindex'
or tp == 'tableindex' then
return m.getNameOfLiteral(obj.index)
elseif tp == 'field'
or tp == 'method' then
return obj[1]
end
return m.getNameOfLiteral(obj)
end
function m.getKeyNameOfLiteral(obj)
if not obj then
return nil
end
local tp = obj.type
if tp == 'field'
or tp == 'method' then
return 's|' .. obj[1]
elseif tp == 'string' then
local s = obj[1]
if s then
return 's|' .. s
else
return s
end
elseif tp == 'number' then
local n = obj[1]
if n then
return ('n|%s'):format(util.viewLiteral(obj[1]))
else
return 'n'
end
elseif tp == 'boolean' then
local b = obj[1]
if b then
return 'b|' .. tostring(b)
else
return 'b'
end
end
return nil
end
function m.getKeyName(obj)
local tp = obj.type
if tp == 'getglobal'
or tp == 'setglobal' then
return 's|' .. obj[1]
elseif tp == 'local'
or tp == 'getlocal'
or tp == 'setlocal' then
return 'l|' .. obj[1]
elseif tp == 'getfield'
or tp == 'setfield'
or tp == 'tablefield' then
if obj.field then
return 's|' .. obj.field[1]
end
elseif tp == 'getmethod'
or tp == 'setmethod' then
if obj.method then
return 's|' .. obj.method[1]
end
elseif tp == 'getindex'
or tp == 'setindex'
or tp == 'tableindex' then
return m.getKeyNameOfLiteral(obj.index)
elseif tp == 'field'
or tp == 'method' then
return 's|' .. obj[1]
end
return m.getKeyNameOfLiteral(obj)
end
function m.getSimpleName(obj)
if obj.type == 'call' then
local key = obj.args[2]
return m.getKeyName(key)
end
return m.getKeyName(obj)
end
function m.getENV(ast)
if ast.type ~= 'main' then
return nil
end
return ast.locals[1]
end
--- 测试 a 到 b 的路径(不经过函数,不考虑 goto),
--- 每个路径是一个 block 。
---
--- 如果 a 在 b 的前面,返回 `"before"` 加上 2个`list<block>`
---
--- 如果 a 在 b 的后面,返回 `"after"` 加上 2个`list<block>`
---
--- 否则返回 `false`
---
--- 返回的2个 `list` 分别为基准block到达 a 与 b 的路径。
---@param a table
---@param b table
---@return string|boolean mode
---@return table|nil pathA
---@return table|nil pathB
function m.getPath(a, b, sameFunction)
--- 首先测试双方在同一个函数内
if not sameFunction and m.getParentFunction(a) ~= m.getParentFunction(b) then
return false
end
local mode
local objA
local objB
if a.finish < b.start then
mode = 'before'
objA = a
objB = b
elseif a.start > b.finish then
mode = 'after'
objA = b
objB = a
else
return 'equal', {}, {}
end
local pathA = {}
local pathB = {}
for _ = 1, 1000 do
objA = m.getParentBlock(objA)
pathA[#pathA+1] = objA
if (not sameFunction and objA.type == 'function') or objA.type == 'main' then
break
end
end
for _ = 1, 1000 do
objB = m.getParentBlock(objB)
pathB[#pathB+1] = objB
if (not sameFunction and objA.type == 'function') or objB.type == 'main' then
break
end
end
-- pathA: {1, 2, 3, 4, 5}
-- pathB: {5, 6, 2, 3}
local top = #pathB
local start
for i = #pathA, 1, -1 do
local currentBlock = pathA[i]
if currentBlock == pathB[top] then
start = i
break
end
end
if not start then
return nil
end
-- pathA: { 1, 2, 3}
-- pathB: {5, 6, 2, 3}
local extra = 0
local align = top - start
for i = start, 1, -1 do
local currentA = pathA[i]
local currentB = pathB[i+align]
if currentA ~= currentB then
extra = i
break
end
end
-- pathA: {1}
local resultA = {}
for i = extra, 1, -1 do
resultA[#resultA+1] = pathA[i]
end
-- pathB: {5, 6}
local resultB = {}
for i = extra + align, 1, -1 do
resultB[#resultB+1] = pathB[i]
end
return mode, resultA, resultB
end
-- 根据语法,单步搜索定义
local function stepRefOfLocal(loc, mode)
local results = {}
if loc.start ~= 0 then
results[#results+1] = loc
end
local refs = loc.ref
if not refs then
return results
end
for i = 1, #refs do
local ref = refs[i]
if ref.start == 0 then
goto CONTINUE
end
if mode == 'def' then
if ref.type == 'local'
or ref.type == 'setlocal' then
results[#results+1] = ref
end
else
if ref.type == 'local'
or ref.type == 'setlocal'
or ref.type == 'getlocal' then
results[#results+1] = ref
end
end
::CONTINUE::
end
return results
end
local function stepRefOfLabel(label, mode)
local results = { label }
if not label or mode == 'def' then
return results
end
local refs = label.ref
for i = 1, #refs do
local ref = refs[i]
results[#results+1] = ref
end
return results
end
local function stepRefOfGlobal(obj, mode)
local results = {}
local name = m.getKeyName(obj)
local refs = obj.node.ref
for i = 1, #refs do
local ref = refs[i]
if m.getKeyName(ref) == name then
if mode == 'def' then
if obj == 'setglobal' then
results[#results+1] = ref
end
else
results[#results+1] = ref
end
end
end
return results
end
function m.getStepRef(obj, mode)
if obj.type == 'getlocal'
or obj.type == 'setlocal' then
return stepRefOfLocal(obj.node, mode)
end
if obj.type == 'local' then
return stepRefOfLocal(obj, mode)
end
if obj.type == 'label' then
return stepRefOfLabel(obj, mode)
end
if obj.type == 'goto' then
return stepRefOfLabel(obj.node, mode)
end
if obj.type == 'getglobal'
or obj.type == 'setglobal' then
return stepRefOfGlobal(obj, mode)
end
return nil
end
-- 根据语法,单步搜索field
local function stepFieldOfLocal(loc)
local results = {}
local refs = loc.ref
for i = 1, #refs do
local ref = refs[i]
if ref.type == 'setglobal'
or ref.type == 'getglobal' then
results[#results+1] = ref
elseif ref.type == 'getlocal' then
local nxt = ref.next
if nxt then
if nxt.type == 'setfield'
or nxt.type == 'getfield'
or nxt.type == 'setmethod'
or nxt.type == 'getmethod'
or nxt.type == 'setindex'
or nxt.type == 'getindex' then
results[#results+1] = nxt
end
end
end
end
return results
end
local function stepFieldOfTable(tbl)
local result = {}
for i = 1, #tbl do
result[i] = tbl[i]
end
return result
end
function m.getStepField(obj)
if obj.type == 'getlocal'
or obj.type == 'setlocal' then
return stepFieldOfLocal(obj.node)
end
if obj.type == 'local' then
return stepFieldOfLocal(obj)
end
if obj.type == 'table' then
return stepFieldOfTable(obj)
end
end
local function convertSimpleList(list)
local simple = {}
for i = #list, 1, -1 do
local c = list[i]
if c.special == '_G' then
simple.global = true
else
simple[#simple+1] = m.getSimpleName(c)
end
if c.type == 'getglobal'
or c.type == 'setglobal' then
simple.global = true
end
if #simple <= 1 then
if simple.global then
simple.first = m.getLocal(c, '_ENV', c.start)
elseif c.type == 'setlocal'
or c.type == 'getlocal' then
simple.first = c.node
else
simple.first = c
end
end
end
return simple
end
-- 搜索 `a.b.c` 的等价表达式
local function buildSimpleList(obj, max)
local list = {}
local cur = obj
local limit = max and (max + 1) or 11
for i = 1, max or limit do
if i == limit then
return nil
end
if cur.type == 'setfield'
or cur.type == 'getfield'
or cur.type == 'setmethod'
or cur.type == 'getmethod'
or cur.type == 'setindex'
or cur.type == 'getindex' then
list[i] = cur
cur = cur.node
elseif cur.type == 'tablefield'
or cur.type == 'tableindex' then
list[i] = cur
cur = cur.parent.parent
elseif cur.type == 'getlocal'
or cur.type == 'setlocal'
or cur.type == 'local' then
list[i] = cur
break
elseif cur.type == 'setglobal'
or cur.type == 'getglobal' then
list[i] = cur
break
elseif cur.type == 'function'
or cur.type == 'main' then
break
else
return nil
end
end
return convertSimpleList(list)
end
function m.getSimple(obj, max)
local simpleList
if obj.type == 'getfield'
or obj.type == 'setfield'
or obj.type == 'getmethod'
or obj.type == 'setmethod'
or obj.type == 'getindex'
or obj.type == 'setindex'
or obj.type == 'local'
or obj.type == 'getlocal'
or obj.type == 'setlocal'
or obj.type == 'setglobal'
or obj.type == 'getglobal'
or obj.type == 'tableindex' then
simpleList = buildSimpleList(obj, max)
elseif obj.type == 'field'
or obj.type == 'method' then
simpleList = buildSimpleList(obj.parent, max)
end
return simpleList
end
m.SearchFlag = {
STEP = 1 << 0,
SIMPLE = 1 << 1,
ALL = 0xffff,
}
m.Version = 53
function m.status(parentStatus, interface)
local status = {
cache = parentStatus and parentStatus.cache or {},
depth = parentStatus and parentStatus.depth or 0,
interface = parentStatus and parentStatus.interface or {},
flag = m.SearchFlag.ALL,
results = {},
}
if interface then
for k, v in pairs(interface) do
status.interface[k] = v
end
end
return status
end
function m.copyStatusResults(a, b)
local ra = a.results
local rb = b.results
for i = 1, #rb do
ra[#ra+1] = rb[i]
end
end
function m.getCallAndArgIndex(callarg)
local callargs = callarg.parent
if not callargs or callargs.type ~= 'callargs' then
return nil
end
local index
for i = 1, #callargs do
if callargs[i] == callarg then
index = i
break
end
end
local call = callargs.parent
return call, index
end
-- 根据函数调用的返回值,获取:调用的函数,参数列表,自己是第几个返回值
function m.getCallValue(source)
local value = source.value
if not value or value.type ~= 'select' then
return
end
local call = value.vararg
if call.type ~= 'call' then
return
end
return call.node, call.args, value.index
end
function m.getNextRef(ref)
local nextRef = ref.next
if nextRef then
if nextRef.type == 'setfield'
or nextRef.type == 'getfield'
or nextRef.type == 'setmethod'
or nextRef.type == 'getmethod'
or nextRef.type == 'setindex'
or nextRef.type == 'getindex' then
return nextRef
end
else
-- 穿透 rawget 与 rawset
local call, index = m.getCallAndArgIndex(ref)
if call then
if call.node.special == 'rawset' and index == 1 then
return call
end
if call.node.special == 'rawget' and index == 1 then
return call
end
end
end
return nil
end
function m.checkSameSimpleInValueOfTable(status, value, start, queue)
if value.type ~= 'table' then
return
end
for i = 1, #value do
local field = value[i]
queue[#queue+1] = {
obj = field,
start = start + 1,
}
end
end
function m.searchFields(status, obj, key, interface)
if obj.type == 'table' then
local keyName = key and ('s|' .. key)
local results = {}
for i = 1, #obj do
local field = obj[i]
if not keyName or keyName == m.getSimpleName(field) then
results[#results+1] = field
end
end
return results
else
local newStatus = m.status(status, interface)
local simple = m.getSimple(obj, 1)
if not simple then
return {}
end
simple[#simple+1] = key and ('s|' .. key) or '*'
m.searchSameFields(newStatus, simple, 'def')
local results = newStatus.results
m.cleanResults(results)
return results
end
end
function m.getObjectValue(obj)
if obj.value then
return obj.value
end
if obj.type == 'field'
or obj.type == 'method' then
return obj.parent.value
end
if obj.type == 'call' then
if obj.node.special == 'rawset' then
return obj.args[3]
end
end
return nil
end
function m.checkSameSimpleInValueInMetaTable(status, mt, start, queue)
local indexes = m.searchFields(status, mt, '__index')
if not indexes then
return
end
local refsStatus = m.status(status)
for i = 1, #indexes do
local indexValue = m.getObjectValue(indexes[i])
if indexValue then
m.searchRefs(refsStatus, indexValue, 'ref')
end
end
for i = 1, #refsStatus.results do
local obj = refsStatus.results[i]
queue[#queue+1] = {
obj = obj,
start = start,
force = true,
}
end
end
function m.checkSameSimpleInValueOfSetMetaTable(status, value, start, queue)
if value.type ~= 'select' then
return
end
local vararg = value.vararg
if not vararg or vararg.type ~= 'call' then
return
end
local func = vararg.node
if not func or func.special ~= 'setmetatable' then
return
end
local args = vararg.args
local obj = args[1]
local mt = args[2]
if obj then
queue[#queue+1] = {
obj = obj,
start = start,
force = true,
}
end
if mt then
m.checkSameSimpleInValueInMetaTable(status, mt, start, queue)
end
end
function m.checkSameSimpleInArg1OfSetMetaTable(status, obj, start, queue)
local args = obj.parent
if not args or args.type ~= 'callargs' then
return
end
if args[1] ~= obj then
return
end
local mt = args[2]
if mt then
m.checkSameSimpleInValueInMetaTable(status, mt, start, queue)
end
end
function m.checkSameSimpleInBranch(status, ref, start, queue)
-- 根据赋值扩大搜索范围
local value = m.getObjectValue(ref)
if value then
-- 检查赋值是字面量表的情况
m.checkSameSimpleInValueOfTable(status, value, start, queue)
-- 检查赋值是 setmetatable 调用的情况
m.checkSameSimpleInValueOfSetMetaTable(status, value, start, queue)
end
-- 检查自己是字面量表的情况
m.checkSameSimpleInValueOfTable(status, ref, start, queue)
-- 检查自己作为 setmetatable 第一个参数的情况
m.checkSameSimpleInArg1OfSetMetaTable(status, ref, start, queue)
end
function m.searchSameMethodCrossSelf(ref, mark)
local selfNode
if ref.tag == 'self' then
selfNode = ref
else
if ref.type == 'getlocal'
or ref.type == 'setlocal' then
local node = ref.node
if node.tag == 'self' then
selfNode = node
end
end
end
if selfNode then
if mark[selfNode] then
return nil
end
mark[selfNode] = true
return selfNode.method.node
end
end
function m.searchSameMethod(ref, mark)
if mark['method'] then
return nil
end
local nxt = ref.next
if not nxt then
return nil
end
if nxt.type == 'setmethod' then
mark['method'] = true
return ref
end
return nil
end
function m.searchSameFieldsCrossMethod(status, ref, start, queue)
local mark = status.cache.crossMethodMark
if not mark then
mark = {}
status.cache.crossMethodMark = mark
end
local method = m.searchSameMethod(ref, mark)
or m.searchSameMethodCrossSelf(ref, mark)
if not method then
return
end
local methodStatus = m.status(status)
m.searchRefs(methodStatus, method, 'ref')
for _, md in ipairs(methodStatus.results) do
queue[#queue+1] = {
obj = md,
start = start,
force = true,
}
local nxt = md.next
if not nxt then
goto CONTINUE
end
if nxt.type == 'setmethod' then
local func = nxt.value
if not func then
goto CONTINUE
end
local selfNode = func.locals and func.locals[1]
if not selfNode or not selfNode.ref then
goto CONTINUE
end
if mark[selfNode] then
goto CONTINUE
end
mark[selfNode] = true
for _, selfRef in ipairs(selfNode.ref) do
queue[#queue+1] = {
obj = selfRef,
start = start,
force = true,
}
end
end
::CONTINUE::
end
end
function m.checkSameSimpleInCall(status, ref, start, queue)
if not status.interface.call then
return
end
local func, args, index = m.getCallValue(ref)
if not func then
return
end
local objs = status.interface.call(func, args, index)
if objs then
for _, obj in ipairs(objs) do
queue[#queue+1] = {
obj = obj,
start = start,
force = true,
call = true,
}
end
end
end
function m.checkSameSimpleInGlobal(status, name, start, queue)
if not status.interface.global then
return
end
local objs = status.interface.global(name)
if objs then
for _, obj in ipairs(objs) do
queue[#queue+1] = {
obj = obj,
start = start,
force = true,
}
end
end
end
function m.checkSameSimple(status, simple, data, mode, results, queue)
local ref = data.obj
local start = data.start
local force = data.force
for i = start, #simple do
local sm = simple[i]
if sm ~= '*' and not force and m.getSimpleName(ref) ~= sm then
return
end
force = false
-- 穿透 self:func 与 mt:func
m.searchSameFieldsCrossMethod(status, ref, i, queue)
if i == #simple then
break
end
-- 检查形如 a = {} 的分支情况
m.checkSameSimpleInBranch(status, ref, i, queue)
-- 检查形如 a = f() 的分支情况,需要业务层传入 interface.call
m.checkSameSimpleInCall(status, ref, i, queue)
ref = m.getNextRef(ref)
if not ref then
return
end
end
if mode == 'def' then
if ref.type == 'setglobal'
or ref.type == 'setlocal'
or ref.type == 'local' then
results[#results+1] = ref
elseif ref.type == 'setfield'
or ref.type == 'tablefield' then
results[#results+1] = ref.field
elseif ref.type == 'setmethod' then
results[#results+1] = ref.method
elseif ref.type == 'setindex'
or ref.type == 'tableindex' then
results[#results+1] = ref.index
elseif ref.type == 'call' then
if ref.node.special == 'rawset' then
results[#results+1] = ref
end
end
if data.call then
results[#results+1] = ref
end
else
if ref.type == 'setfield'
or ref.type == 'getfield'
or ref.type == 'tablefield' then
results[#results+1] = ref.field
elseif ref.type == 'setmethod'
or ref.type == 'getmethod' then
results[#results+1] = ref.method
elseif ref.type == 'setindex'
or ref.type == 'getindex'
or ref.type == 'tableindex' then
results[#results+1] = ref.index
else
results[#results+1] = ref
end
end
end
function m.searchSameFields(status, simple, mode)
local first = simple.first
local fref = first and first.ref
local queue = {}
if fref then
for i = 1, #fref do
local ref = fref[i]
queue[i] = {
obj = ref,
start = 1,
}
end
end
if simple.global then
for i = 1, #queue do
local data = queue[i]
local obj = data.obj
local nxt = m.getNextRef(obj)
if nxt and obj.special == '_G' then
data.obj = nxt
end
end
if first then
if first.tag == '_ENV' then
-- 检查全局变量的分支情况,需要业务层传入 interface.global
m.checkSameSimpleInGlobal(status, simple[1], 1, queue)
else
-- local _ENV 的情况
m.checkSameSimpleInBranch(status, first, 0, queue)
end
end
else
queue[#queue+1] = {
obj = first,
start = 1,
}
if first then
m.checkSameSimpleInCall(status, first, 1, queue)
end
end
for i = 1, 999 do
local data = queue[i]
if not data then
return
end
m.checkSameSimple(status, simple, data, mode, status.results, queue)
end
end
function m.searchRefsAsFunctionReturn(status, obj, mode)
status.results[#status.results+1] = obj
-- 搜索所在函数
local currentFunc = m.getParentFunction(obj)
if currentFunc.type == 'main' then
return
end
local returns = currentFunc.returns
if not returns then
return
end
-- 看看他是第几个返回值
local index
for i = 1, #returns do
local rtn = returns[i]
if m.isContain(rtn, obj.start) then
for j = 1, #rtn do
if obj == rtn[j] then
index = j
goto BREAK
end
end
end
end
::BREAK::
if not index then
return
end
-- 搜索所有所在函数的调用者
local funcRefs = m.status(status)
m.searchRefOfValue(funcRefs, currentFunc)
if #funcRefs.results == 0 then
return
end
local calls = {}
for _, res in ipairs(funcRefs.results) do
local call = res.parent
if call.type == 'call' then
calls[#calls+1] = call
end
end
-- 搜索调用者的返回值
if #calls == 0 then
return
end
local selects = {}
for i = 1, #calls do
local parent = calls[i].parent
if parent.type == 'select' and parent.index == index then
selects[#selects+1] = parent.parent
end
local extParent = calls[i].extParent
if extParent then
for j = 1, #extParent do
local ext = extParent[j]
if ext.type == 'select' and ext.index == index then
selects[#selects+1] = ext.parent
end
end
end
end
-- 搜索调用者的引用
for i = 1, #selects do
m.searchRefs(status, selects[i])
end
end
function m.searchRefsAsFunctionSet(status, obj, mode)
local parent = obj.parent
if not parent then
return
end
if parent.type == 'local'
or parent.type == 'setlocal'
or parent.type == 'setglobal'
or parent.type == 'setfield'
or parent.type == 'setmethod'
or parent.type == 'setindex'
or parent.type == 'tableindex'
or parent.type == 'tablefield' then
m.searchRefs(status, parent, mode)
end
end
function m.searchRefsAsFunction(status, obj, mode)
if obj.type ~= 'function' then
return
end
m.searchRefsAsFunctionSet(status, obj, mode)
-- 检查自己作为返回函数时的引用
m.searchRefsAsFunctionReturn(status, obj, mode)
end
function m.cleanResults(results)
local mark = {}
for i = #results, 1, -1 do
local res = results[i]
if res.tag == 'self'
or mark[res] then
results[i] = results[#results]
results[#results] = nil
else
mark[res] = true
end
end
end
function m.searchRefs(status, obj, mode)
status.depth = status.depth + 1
-- 检查单步引用
if status.flag & m.SearchFlag.STEP ~= 0 then
local res = m.getStepRef(obj, mode)
if res then
for i = 1, #res do
status.results[#status.results+1] = res[i]
end
end
end
-- 检查simple
if status.flag & m.SearchFlag.SIMPLE ~= 0 then
if status.depth <= 10 then
local simple = m.getSimple(obj)
if simple then
m.searchSameFields(status, simple, mode)
end
elseif m.debugMode then
error('stack overflow')
end
end
status.depth = status.depth - 1
m.cleanResults(status.results)
end
function m.searchRefOfValue(status, obj)
local var = obj.parent
if var.type == 'local'
or var.type == 'set' then
return m.searchRefs(status, var, 'ref')
end
end
--- 请求对象的引用,包括 `a.b.c` 形式
--- 与 `return function` 形式。
--- 不穿透 `setmetatable` ,考虑由
--- 业务层进行反向 def 搜索。
function m.requestReference(obj, interface)
local status = m.status(nil, interface)
-- 根据 field 搜索引用
m.searchRefs(status, obj, 'ref')
m.searchRefsAsFunction(status, obj, 'ref')
return status.results
end
--- 请求对象的定义,包括 `a.b.c` 形式
--- 与 `return function` 形式。
--- 穿透 `setmetatable` 。
function m.requestDefinition(obj, interface)
local status = m.status(nil, interface)
-- 根据 field 搜索定义
m.searchRefs(status, obj, 'def')
return status.results
end
--- 请求对象的域
function m.requestFields(obj, interface)
return m.searchFields(nil, obj, nil, interface)
end
return m
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