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|
local error = error
local type = type
local next = next
local tostring = tostring
local util = require 'utility'
_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 }
while true do
local len = #list
if len == 0 then
return
end
local obj = list[len]
list[len] = nil
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
--- 遍历所有指定类型的source
function m.eachSourceType(ast, type, callback)
local cache = ast.typeCache
if not cache then
local mark = {}
cache = {}
ast.typeCache = cache
m.eachSource(ast, function (source)
if mark[source] then
return
end
mark[source] = true
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 index = 1
while true do
local obj = list[index]
if not obj then
return
end
list[index] = false
index = index + 1
callback(obj)
m.addChilds(list, obj, m.childMap)
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]
elseif tp == 'index' then
return m.getNameOfLiteral(obj.index)
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 == '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 == 'index' 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.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
-- 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
return m
|