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1194 lines (1124 loc) · 31 KB
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Copy pathAssembly.lua
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1194 lines (1124 loc) · 31 KB
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--[[
Copyright 2017 YANG Huan (sy.yanghuan@gmail.com).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--]]
local System = System
local define = System.define
local throw = System.throw
local div = System.div
local Type = System.Type
local typeof = System.typeof
local getClass = System.getClass
local is = System.is
local band = System.band
local arrayFromTable = System.arrayFromTable
local toLuaTable = System.toLuaTable
local Exception = System.Exception
local NotSupportedException = System.NotSupportedException
local ArgumentException = System.ArgumentException
local ArgumentNullException = System.ArgumentNullException
local assert = assert
local pairs = pairs
local getmetatable = getmetatable
local setmetatable = setmetatable
local rawget = rawget
local type = type
local unpack = table.unpack
local select = select
local floor = math.floor
local TargetException = define("System.Reflection.TargetException", {
__tostring = Exception.ToString,
base = { Exception }
})
local TargetParameterCountException = define("System.Reflection.TargetParameterCountException", {
__tostring = Exception.ToString,
base = { Exception },
__ctor__ = function(this, message, innerException)
Exception.__ctor__(this, message or "Parameter count mismatch.", innerException)
end,
})
local AmbiguousMatchException = define("System.Reflection.AmbiguousMatchException", {
__tostring = Exception.ToString,
base = { System.SystemException },
__ctor__ = function(this, message, innerException)
Exception.__ctor__(this, message or "Ambiguous match found.", innerException)
end,
})
local MissingMethodException = define("System.MissingMethodException", {
__tostring = Exception.ToString,
base = { Exception },
__ctor__ = function(this, message, innerException)
Exception.__ctor__(this, message or "Specified method could not be found.", innerException)
end
})
local function throwNoMatadata(sign)
throw(NotSupportedException("not found metadata for " .. sign), 1)
end
local function eq(left, right)
return left[1] == right[1] and left.name == right.name
end
local function getName(this)
return this.name
end
local function isAccessibility(this, kind)
local metadata = this:getMetadata()
return band(metadata[2], 0x7) == kind
end
local MemberInfo = define("System.Reflection.MemberInfo", {
getName = getName,
getCls = function (this)
return this.c
end,
getMetadata = function (this)
local metadata = this.metadata
if not metadata then
throwNoMatadata(this:getCls().__name__ .. "." .. this.name)
end
return metadata
end,
EqualsObj = function (this, obj)
if getmetatable(this) ~= getmetatable(obj) then
return false
end
return eq(this, obj)
end,
getMemberType = function (this)
return this.memberType
end,
getDeclaringType = function (this)
return typeof(this:getCls())
end,
getIsAbstract = function (this)
local metadata = this:getMetadata()
return band(metadata[2], 0x10) ~= 0
end,
getIsStatic = function (this)
local metadata = this:getMetadata()
return band(metadata[2], 0x8) ~= 0
end,
getIsPrivate = function (this)
return isAccessibility(this, 1)
end,
getIsFamilyAndAssembly = function (this)
return isAccessibility(this, 2)
end,
getIsFamily = function (this)
return isAccessibility(this, 3)
end,
getIsAssembly = function (this)
return isAccessibility(this, 4)
end,
getIsFamilyOrAssembly = function (this)
return isAccessibility(this, 5)
end,
getIsPublic = function (this)
return isAccessibility(this, 6)
end
})
local function getFieldOrPropertyType(this)
local metadata = this.metadata
if not metadata then
throwNoMatadata(this.c.__name__ .. "." .. this.name)
end
return typeof(metadata[3])
end
local function checkObj(obj, cls)
if not is(obj, cls) then
throw(ArgumentException("Object does not match target type.", "obj"), 1)
end
end
local function checkTarget(cls, obj, metadata)
if band(metadata[2], 0x8) == 0 then
if obj == nil then
throw(TargetException())
end
checkObj(obj, cls)
else
return true
end
end
local function checkValue(value, valueClass)
if value == nil then
if valueClass.class == "S" then
value = valueClass:default()
end
else
checkObj(value, valueClass)
end
return value
end
local function getOrSetField(this, obj, isSet, value)
local cls, metadata = this.c, this.metadata
if metadata then
if checkTarget(cls, obj, metadata) then
obj = cls
end
local name = metadata[4]
if type(name) ~= "string" then
name = this.name
end
if isSet then
obj[name] = checkValue(value, metadata[3])
else
return obj[name]
end
else
if obj ~= nil then
checkObj(obj, cls)
else
obj = cls
end
if isSet then
obj[this.name] = value
else
return obj[this.name]
end
end
end
local function isMetadataDefined(metadata, index, attributeType)
attributeType = attributeType[1]
for i = index, #metadata do
if is(metadata[i], attributeType) then
return true
end
end
return false
end
local function fillMetadataCustomAttributes(t, metadata, index, attributeType)
local count = #t + 1
if attributeType then
attributeType = attributeType[1]
for i = index, #metadata do
if is(metadata[i], attributeType) then
t[count] = metadata[i]
count = count + 1
end
end
else
for i = index, #metadata do
t[count] = metadata[i]
count = count + 1
end
end
end
local FieldInfo = define("System.Reflection.FieldInfo", {
__eq = eq,
base = { MemberInfo },
memberType = 4,
getFieldType = getFieldOrPropertyType,
GetRawConstantValue = System.nilFn,
GetValue = getOrSetField,
SetValue = function (this, obj, value)
getOrSetField(this, obj, true, value)
end,
IsDefined = function (this, attributeType)
if attributeType == nil then throw(ArgumentNullException()) end
local metadata = this.metadata
if metadata then
return isMetadataDefined(metadata, 4, attributeType)
end
return false
end,
GetCustomAttributes = function (this, attributeType, inherit)
if type(attributeType) == "boolean" then
attributeType, inherit = nil, attributeType
else
if attributeType == nil then throw(ArgumentNullException()) end
end
local t = {}
local metadata = this.metadata
if metadata then
local index = 4
if type(metadata[index]) == "string" then
index = 5
end
fillMetadataCustomAttributes(t, metadata, index, attributeType)
end
return arrayFromTable(t, System.Attribute)
end,
GetCustomAttribute = function (this, attributeType, inherit)
if attributeType == nil then throw(ArgumentNullException()) end
local t = {}
local metadata = this.metadata
if metadata then
local index = 4
if type(metadata[index]) == "string" then
index = 5
end
fillMetadataCustomAttributes(t, metadata, index, attributeType)
end
local size = #t
if size == 0 then
return nil
elseif size > 1 then
throw(AmbiguousMatchException())
end
return t[1]
end
})
local function getOrSetProperty(this, obj, isSet, value)
local cls, metadata = this.c, this.metadata
if metadata then
local isStatic
if checkTarget(cls, obj, metadata) then
obj = cls
isStatic = true
end
if isSet then
value = checkValue(value, metadata[3])
end
local kind = band(metadata[2], 0x300)
if kind == 0 then
local name = metadata[4]
if type(name) ~= "string" then
name = this.name
end
if isSet then
obj[name] = value
else
return obj[name]
end
else
local index
if kind == 0x100 then
index = isSet and 5 or 4
elseif kind == 0x200 then
if isSet then
throw(ArgumentException("Property Set method was not found."))
end
index = 4
else
if not isSet then
throw(ArgumentException("Property Get method was not found."))
end
index = 4
end
local fn = metadata[index]
if type(fn) == "table" then
fn = fn[1]
end
if isSet then
if isStatic then
fn(value)
else
fn(obj, value)
end
else
return fn(obj)
end
end
else
local isStatic
if obj ~= nil then
checkObj(obj, cls)
else
obj = cls
isStatic = true
end
if this.isField then
if isSet then
obj[this.name] = value
else
return obj[this.name]
end
else
if isSet then
local fn = obj["set" .. this.name]
if fn == nil then
throw(ArgumentException("Property Set method not found."))
end
if isStatic then
fn(value)
else
fn(obj, value)
end
else
local fn = obj["get" .. this.name]
if fn == nil then
throw(ArgumentException("Property Get method not found."))
end
return fn(obj)
end
end
end
end
local function getPropertyAttributesIndex(metadata)
local kind = band(metadata[2], 0x300)
local index
if kind == 0 then
index = 4
elseif kind == 0x100 then
index = 6
else
index = 5
end
return index
end
local PropertyInfo = define("System.Reflection.PropertyInfo", {
__eq = eq,
base = { MemberInfo },
memberType = 16,
getPropertyType = getFieldOrPropertyType,
GetValue = getOrSetProperty,
SetValue = function (this, obj, value)
getOrSetProperty(this, obj, true, value)
end,
IsDefined = function (this, attributeType)
if attributeType == nil then throw(ArgumentNullException()) end
local metadata = this.metadata
if metadata then
local index = getPropertyAttributesIndex(metadata)
return isMetadataDefined(metadata, index, attributeType)
end
return false
end,
GetCustomAttributes = function (this, attributeType, inherit)
if type(attributeType) == "boolean" then
attributeType, inherit = nil, attributeType
else
if attributeType == nil then throw(ArgumentNullException()) end
end
local t = {}
local metadata = this.metadata
if metadata then
local index = getPropertyAttributesIndex(metadata)
fillMetadataCustomAttributes(t, metadata, index, attributeType)
end
return arrayFromTable(t, System.Attribute)
end,
GetCustomAttribute = function (this, attributeType, inherit)
if attributeType == nil then throw(ArgumentNullException()) end
local t = {}
local metadata = this.metadata
if metadata then
local index = getPropertyAttributesIndex(metadata)
fillMetadataCustomAttributes(t, metadata, index, attributeType)
end
local size = #t
if size == 0 then
return nil
elseif size > 1 then
throw(AmbiguousMatchException())
end
return t[1]
end
})
local function hasPublicFlag(flags)
return band(flags, 0x7) == 6
end
local function getMethodParameterCount(flags)
local count = band(flags, 0xFF00)
if count ~= 0 then
count = count / 256
end
return floor(count)
end
local function getMethodAttributesIndex(metadata)
local flags = metadata[2]
local index
local typeParametersCount = band(flags, 0xFF0000)
if typeParametersCount == 0 then
local parameterCount = getMethodParameterCount(flags)
if band(flags, 0x80) == 0 then
index = 4 + parameterCount
else
index = 5 + parameterCount
end
else
index = 5
end
return index
end
local MethodInfo = define("System.Reflection.MethodInfo", {
__eq = eq,
base = { MemberInfo },
memberType = 8,
getReturnType = function (this)
local metadata = this.metadata
if not metadata then
throwNoMatadata(this.c.__name__ .. "." .. this.name)
end
local flags = metadata[2]
if band(flags, 0x80) == 0 then
return Type.Void
end
if band(flags, 0xC00) > 0 then
assert(false, "not implement for generic method")
end
local parameterCount = getMethodParameterCount(flags)
return typeof(metadata[4 + parameterCount])
end,
Invoke = function (this, obj, parameters)
local cls, metadata = this.c, this.metadata
if metadata then
local isStatic
if checkTarget(cls, obj, metadata) then
isStatic = true
end
local t = {}
local parameterCount = getMethodParameterCount(metadata[2])
if parameterCount == 0 then
if parameters ~= nil and #parameters > 0 then
throw(TargetParameterCountException())
end
else
if parameters == nil and #parameters ~= parameterCount then
throw(TargetParameterCountException())
end
for i = 4, 3 + parameterCount do
local j = #t
local paramValue, mtData = parameters:get(j), metadata[i]
if mtData ~= nil then
paramValue = checkValue(paramValue, mtData)
end
t[j + 1] = paramValue
end
end
local f = metadata[3]
if isStatic then
if t then
return f(unpack(t, 1, parameterCount))
else
return f()
end
else
if t then
return f(obj, unpack(t, 1, parameterCount))
else
return f(obj)
end
end
else
local f = assert(this.f)
if obj ~= nil then
checkObj(obj, cls)
if parameters ~= nil then
local t = toLuaTable(parameters)
return f(obj, unpack(t, 1, #parameters))
else
return f(obj)
end
else
if parameters ~= nil then
local t = toLuaTable(parameters)
return f(unpack(t, 1, #parameters))
else
return f()
end
end
end
end,
IsDefined = function (this, attributeType, inherit)
if attributeType == nil then throw(ArgumentNullException()) end
local metadata = this.metadata
if metadata then
local index = getMethodAttributesIndex(metadata)
return isMetadataDefined(metadata, index, attributeType)
end
return false
end,
GetCustomAttributes = function (this, attributeType, inherit)
if type(attributeType) == "boolean" then
attributeType, inherit = nil, attributeType
else
if attributeType == nil then throw(ArgumentNullException()) end
end
local t = {}
local metadata = this.metadata
if metadata then
local index = getMethodAttributesIndex(metadata)
fillMetadataCustomAttributes(t, metadata, index, attributeType)
end
return arrayFromTable(t, System.Attribute)
end,
GetCustomAttribute = function (this, attributeType, inherit)
if attributeType == nil then throw(ArgumentNullException()) end
local t = {}
local metadata = this.metadata
if metadata then
local index = getMethodAttributesIndex(metadata)
fillMetadataCustomAttributes(t, metadata, index, attributeType)
end
local size = #t
if size == 0 then
return nil
elseif size > 1 then
throw(AmbiguousMatchException())
end
return t[1]
end
})
local function buildFieldInfo(cls, name, metadata)
return setmetatable({ c = cls, name = name, metadata = metadata }, FieldInfo)
end
local function buildPropertyInfo(cls, name, metadata, isField)
return setmetatable({ c = cls, name = name, metadata = metadata, isField = isField }, PropertyInfo)
end
local function buildMethodInfo(cls, name, metadata, f)
return setmetatable({ c = cls, name = name, metadata = metadata, f = f }, MethodInfo)
end
-- https://en.cppreference.com/w/cpp/algorithm/lower_bound
local function lowerBound(t, first, last, value, comp)
local count = last - first
local it, step
while count > 0 do
it = first
step = div(count, 2)
it = it + step
if comp(t[it], value) then
it = it + 1
first = it
count = count - (step + 1)
else
count = step
end
end
return first
end
local function metadataItemCompByName(item, name)
return item[1] < name
end
local function binarySearchByName(metadata, name)
local last = #metadata + 1
local index = lowerBound(metadata, 1, last, name, metadataItemCompByName)
if index ~= last then
local item = metadata[index]
if item[1] == name then
return metadata[index], index
end
end
return nil
end
function Type.GetField(this, name)
if name == nil then throw(ArgumentNullException()) end
local cls = this[1]
local metadata = cls.__metadata__
if metadata then
local fields = metadata.fields
if fields then
local field = binarySearchByName(fields, name)
if field then
return buildFieldInfo(cls, name, field)
end
return nil
end
end
if type(cls[name]) ~= "function" then
return buildFieldInfo(cls, name)
end
end
function Type.GetFields(this)
local t = {}
local cls = this[1]
local count = 1
repeat
local metadata = rawget(cls, "__metadata__")
if metadata then
local fields = metadata.fields
if fields then
for i = 1, #fields do
local field = fields[i]
if hasPublicFlag(field[2]) then
t[count] = buildFieldInfo(cls, field[1], field)
count = count + 1
end
end
else
metadata = nil
end
end
if not metadata then
for k, v in pairs(cls) do
if type(v) ~= "function" then
t[count] = buildFieldInfo(cls, k)
count = count + 1
end
end
end
cls = getmetatable(cls)
until cls == nil
return arrayFromTable(t, FieldInfo)
end
function Type.GetProperty(this, name)
if name == nil then throw(ArgumentNullException()) end
local cls = this[1]
local metadata = cls.__metadata__
if metadata then
local properties = metadata.properties
if properties then
local property = binarySearchByName(properties, name)
if property then
return buildPropertyInfo(cls, name, property)
end
return nil
end
end
if cls["get" .. name] or cls["set" .. name] then
return buildPropertyInfo(cls, name)
else
return buildPropertyInfo(cls, name, nil, true)
end
end
function Type.GetProperties(this)
local t = {}
local cls = this[1]
local count = 1
repeat
local metadata = rawget(cls, "__metadata__")
if metadata then
local properties = metadata.properties
if properties then
for i = 1, #properties do
local property = properties[i]
if hasPublicFlag(property[2]) then
t[count] = buildPropertyInfo(cls, property[1], property)
count = count + 1
end
end
end
end
cls = getmetatable(cls)
until cls == nil
return arrayFromTable(t, PropertyInfo)
end
function Type.GetMethod(this, name)
if name == nil then throw(ArgumentNullException()) end
local cls = this[1]
local metadata = cls.__metadata__
if metadata then
local methods = metadata.methods
if methods then
local item, index = binarySearchByName(methods, name)
if item then
local next = methods[index + 1]
if next and next[1] == name then
throw(AmbiguousMatchException())
end
return buildMethodInfo(cls, name, item, item[3])
end
return nil
end
end
local f = cls[name]
if type(f) == "function" then
return buildMethodInfo(cls, name, nil, f)
end
end
function Type.GetMethods(this)
local t = {}
local cls = this[1]
local count = 1
repeat
local metadata = rawget(cls, "__metadata__")
if metadata then
local methods = metadata.methods
if methods then
for i = 1, #methods do
local method = methods[i]
if hasPublicFlag(method[2]) then
t[count] = buildMethodInfo(cls, method[1], method, method[3])
count = count + 1
end
end
else
metadata = nil
end
end
if not metadata then
for k, v in pairs(cls) do
if type(v) == "function" then
t[count] = buildMethodInfo(cls, k, nil, v)
count = count + 1
end
end
end
cls = getmetatable(cls)
until cls == nil
return arrayFromTable(t, MethodInfo)
end
function Type.GetMembers(this)
local t = arrayFromTable({}, MemberInfo)
t:addRange(this:GetFields())
t:addRange(this:GetProperties())
t:addRange(this:GetMethods())
return t
end
function Type.IsDefined(this, attributeType, inherit)
if attributeType == nil then throw(ArgumentNullException()) end
local cls = this[1]
if not inherit then
local metadata = rawget(cls, "__metadata__")
if metadata then
local class = metadata.class
if class then
return isMetadataDefined(class, 3, attributeType)
end
end
return false
else
repeat
local metadata = rawget(cls, "__metadata__")
if metadata then
local class = metadata.class
if class then
if isMetadataDefined(class, 3, attributeType) then
return true
end
end
end
cls = getmetatable(cls)
until cls == nil
return false
end
end
function Type.GetCustomAttributes(this, attributeType, inherit)
if type(attributeType) == "boolean" then
attributeType, inherit = nil, attributeType
else
if attributeType == nil then throw(ArgumentNullException()) end
end
local cls = this[1]
local t = {}
if not inherit then
local metadata = rawget(cls, "__metadata__")
if metadata then
local class = metadata.class
if class then
fillMetadataCustomAttributes(t, class, 3, attributeType)
end
end
else
repeat
local metadata = rawget(cls, "__metadata__")
if metadata then
local class = metadata.class
if class then
fillMetadataCustomAttributes(t, class, 3, attributeType)
end
end
cls = getmetatable(cls)
until cls == nil
end
return arrayFromTable(t, System.Attribute)
end
local Assembly, coreSystemAssembly
local function getAssembly(t)
local assembly = t[1].__assembly__
if assembly then
return setmetatable(assembly, Assembly)
end
return coreSystemAssembly
end
local function getAssemblyName(this)
local name = this.name or "CSharpLua.CoreLib"
return name .. ", Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"
end
Assembly = define("System.Reflection.Assembly", {
GetName = getAssemblyName,
getFullName = getAssemblyName,
GetAssembly = getAssembly,
GetTypeFrom = Type.GetTypeFrom,
GetEntryAssembly = function ()
local entryAssembly = System.entryAssembly
if entryAssembly then
return setmetatable(entryAssembly, Assembly)
end
return nil
end,
getEntryPoint = function (this)
local entryPoint = this.entryPoint
if entryPoint ~= nil then
local _, _, t, name = entryPoint:find("(.*)%.(.*)")
local cls = getClass(t)
local f = assert(cls[name])
return buildMethodInfo(cls, name, nil, f)
end
return nil
end,
GetExportedTypes = function (this)
if this.exportedTypes then
return this.exportedTypes
end
local t = {}
local classes = this.classes
if classes then
for i = 1, #classes do
t[i] = typeof(classes[i])
end
end
local array = arrayFromTable(t, Type, true)
this.exportedTypes = array
return array
end
})
coreSystemAssembly = Assembly()
function System.GetExecutingAssembly(assembly)
return setmetatable(assembly, Assembly)
end
setmetatable(Type, MemberInfo)
Type.getAssembly = getAssembly
Type.memberType = 32
Type.getCls = function (this)
return this[1]
end
Type.getMetadata = function (this)
local cls = this[1]
local metadata = rawget(cls, "__metadata__")
if not metadata then
throwNoMatadata(cls.__name__)
end
return metadata.class
end
function Type.getAssemblyQualifiedName(this)
return this:getName() .. ', ' .. getName(assembly)
end
function Type.getAttributes(this)
local cls = this[1]
local metadata = rawget(cls, "__metadata__")
if metadata then
metadata = metadata.class
if metadata then
return metadata[2]
end
end
throwNoMatadata(cls.__name__)
end
local function getGenericClsFrom(name)
local _, i = name:find('.*`')
if i then
local genericBaseName = name:sub(1, i - 1)
local genericArgumentCount = name:sub(i + 1, i + 1)
name = genericBaseName .. '_' .. genericArgumentCount
end
return getClass(name)
end
local function getClsFrom(name)
local i = name:find("%[")
if i then
local t, count = {}, 1
local genericName = name:sub(1, i - 1)
local cls = getGenericClsFrom(genericName)
i = i + 1
while true do
local j = name:find(",", i) or -1
local clsName = name:sub(i, j - 1)
t[count] = getClsFrom(clsName)
if j == -1 then
break
end
count = count + 1
i = j + 1
end
return cls(unpack(t))
end
return getClass(name)
end
function Type.GetGenericArguments(this)
local t = {}
local count = 1
local cls = this[1]
local metadata = rawget(cls, "__metadata__")
if metadata then
metadata = metadata.class
if metadata then
local flags = metadata[2]
local typeParameterCount = band(flags, 0xFF00)
if typeParameterCount ~= 0 then
typeParameterCount = typeParameterCount / 256
for i = 3, 2 + typeParameterCount do
t[count] = typeof(metadata[i])
count = count + 1
end
end
return arrayFromTable(t, Type)