--- parser3/src/classes/reflection.C 2009/07/28 08:03:05 1.3 +++ parser3/src/classes/reflection.C 2016/12/01 21:49:02 1.72 @@ -1,262 +1,459 @@ /** @file Parser: @b reflection parser class. - Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com) + Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com) Author: Alexandr Petrosian (http://paf.design.ru) */ -static const char * const IDENT_REFLECTION_C="$Date: 2009/07/28 08:03:05 $"; - #include "pa_vmethod_frame.h" #include "pa_request.h" #include "pa_vbool.h" +#include "pa_vobject.h" + +volatile const char * IDENT_REFLECTION_C="$Id: reflection.C,v 1.72 2016/12/01 21:49:02 moko Exp $"; static const String class_type_methoded("methoded"); static const String method_type_native("native"); static const String method_type_parser("parser"); -static const String method_call_type_static("static"); -static const String method_call_type_dynamic("dynamic"); -static const String method_call_type_any("any"); +static const String method_name("name"); +static const String method_class_name("class"); +static const String method_call_type("call_type"); +static const String method_inherited("inherited"); +static const String method_overridden("overridden"); static const String method_min_params("min_params"); static const String method_max_params("max_params"); +static const String method_extra_param("extra_param"); + +static const String def_class("class"); // class class MReflection: public Methoded { public: MReflection(); -public: // Methoded - bool used_directly() { return true; } }; // global variable -DECLARE_CLASS_VAR(reflection, new MReflection, 0); +DECLARE_CLASS_VAR(reflection, new MReflection); // methods static void _create(Request& r, MethodParams& params) { - const String& class_name=params.as_string(0, "class_name must be string"); - Value* class_value=r.classes().get(class_name); + const Method* method; + const String& class_name=params.as_string(0, "class name must be string"); + VStateless_class* vclass=r.get_class(class_name); - if(!class_value) - throw Exception(PARSER_RUNTIME, - &class_name, - "class is undefined"); - - const String& constructor_name=params.as_string(1, "constructor_name must be string"); - Value* constructor_value=class_value->get_element(constructor_name, *class_value, true); - - if(!constructor_value || !constructor_value->get_junction() || constructor_value->get_junction()->self.get_class()!=class_value) - throw Exception(PARSER_RUNTIME, - &constructor_name, - "constructor must be declared in class '%s'", - class_value->get_class()->name_cstr()); + if(!vclass) + throw Exception(PARSER_RUNTIME, &class_name, "class is undefined"); - Junction* junction=constructor_value->get_junction(); - const Method* method=junction->method; + const String& constructor_name=params.as_string(1, "constructor name must be string"); - int nparams=params.count()-2; - int max_params_count; + if(!(method=vclass->get_method(constructor_name))) + throw Exception(PARSER_RUNTIME, &constructor_name, "constructor not found in class '%s'", vclass->type()); - if(method->native_code){ - if(method->call_type==Method::CT_STATIC) - throw Exception(PARSER_RUNTIME, - &constructor_name, - "native method of class '%s' (%s) is not allowed to be called dynamically", - class_value->get_class()->name_cstr(), - class_value->type()); - - if(nparamsmin_numbered_params_count) - throw Exception(PARSER_RUNTIME, - &constructor_name, - "native method of class '%s' (%s) accepts minimum %d parameter(s) (%d passed)", - class_value->get_class()->name_cstr(), - class_value->type(), - method->min_numbered_params_count, - nparams); + Value &object = r.construct(*vclass, *method); - max_params_count=method->max_numbered_params_count; - } else { - max_params_count=method->params_names->count(); - } + int nparams=params.count()-2; - if(nparams>max_params_count) - throw Exception(PARSER_RUNTIME, - &constructor_name, - "method of class '%s' (%s) accepts maximum %d parameter(s) (%d passed)", - class_value->get_class()->name_cstr(), - class_value->type(), - max_params_count, - nparams); - - VMethodFrame frame(*junction, r.get_method_frame()); - - Value* v[100]; - if(nparams>0){ - for(int i=0; i0){ + for(int i=0; iget_class()) - v=new VString(class_type_methoded); - else - v=VVoid::get(); - result->put(key, v); -} - static void _classes(Request& r, MethodParams&) { VHash& result=*new VHash; - r.classes().for_each(store_vlass_info, result.get_hash()); - r.write_no_lang(result); + for(HashString::Iterator i(r.classes()); i; i.next()){ + result.hash().put(i.key(), i.value()->get_methods().count()>0 ? new VString(class_type_methoded) : VVoid::get() ); + } + r.write(result); } -static Value* get_class(Value* value){ - if(VStateless_class* result=value->get_class()) - return result; - else - // classes with fields only, like env & console +static Value& get_class(Value& value){ + if(VStateless_class* result=value.get_class()) + return *result; + else { + // we can't return code junction to outside as it's stack value + if(Junction *j=value.get_junction()) + if(j->code) + throw Exception(PARSER_RUNTIME, 0, "param must not be code junction"); + // method junction return value; + } } -static const String* get_class_name(Value* value){ - if(VStateless_class* lclass=value->get_class()) - return &lclass->name(); - else - // classes with fields only, like env & console - return new String(value->type()); +static const String& get_class_name(Value& value){ + return *new String(get_class(value).type()); } static void _class(Request& r, MethodParams& params) { - r.write_no_lang(*get_class(¶ms[0])); + r.write(get_class(params[0])); } static void _class_name(Request& r, MethodParams& params) { - r.write_no_lang(*get_class_name(¶ms[0])); + r.write(get_class_name(params[0])); } +static void _class_by_name(Request& r, MethodParams& params) { + const String& class_name=params.as_string(0, "class_name must be string"); + Value* class_value=r.get_class(class_name); + if(!class_value) + throw Exception(PARSER_RUNTIME, &class_name, "class is undefined"); + r.write(*class_value); +} static void _base(Request& r, MethodParams& params) { - if(VStateless_class* lclass=params[0].get_class()) - if(Value* base=lclass->base()){ - r.write_no_lang(*get_class(base)); + if(VStateless_class* vclass=params[0].get_class()) + if(Value* base=vclass->base()){ + r.write(get_class(*base)); return; } // classes with fields only, like env & console or without base - r.write_no_lang(*VVoid::get()); + r.write_value(*VVoid::get()); } static void _base_name(Request& r, MethodParams& params) { - if(VStateless_class* lclass=params[0].get_class()) - if(Value* base=lclass->base()) - r.write_no_lang(*get_class_name(base)); + if(VStateless_class* vclass=params[0].get_class()) + if(Value* base=vclass->base()) + r.write(get_class_name(*base)); } - -static void store_method_info( - HashString::key_type key, - HashString::value_type method, - HashStringValue* result -) { - result->put(key, new VString(method->native_code?method_type_native:method_type_parser)); +static void _def(Request& r, MethodParams& params) { + const String& type=params.as_string(0, "type must be string"); + if(type == def_class) { + const String& name=params.as_string(1, "name must be string"); + // can't use get_class because it will call @autouse[] if the class wasn't loaded + r.write(VBool::get(r.classes().get(name)!=0)); + } else { + throw Exception(PARSER_RUNTIME, &type, "is invalid type, must be '%s'", def_class.cstr()); + } } static void _methods(Request& r, MethodParams& params) { const String& class_name=params.as_string(0, "class_name must be string"); - Value* class_value=r.classes().get(class_name); - if(!class_value) - throw Exception(PARSER_RUNTIME, - &class_name, - "class is undefined"); + VStateless_class* vclass=r.get_class(class_name); + if(!vclass) + throw Exception(PARSER_RUNTIME, &class_name, "class is undefined"); VHash& result=*new VHash; - if(VStateless_class* lclass=class_value->get_class()){ - HashString methods=lclass->get_methods(); - methods.for_each(store_method_info, result.get_hash()); - } else { - // class which does not have methods (env, console, etc) + for(HashStringMethod::Iterator i(vclass->get_methods()); i; i.next()){ + result.hash().put(i.key(), new VString(i.value()->native_code ? method_type_native : method_type_parser)); } - r.write_no_lang(result); + + r.write(result); } +static VJunction &method_junction(Value &self, Method &method){ + if(method.native_code) + throw Exception(PARSER_RUNTIME, method.name, "method must not be native"); -static void _method_params(Request& r, MethodParams& params) { - const String& class_name=params.as_string(0, "class_name must be string"); - Value* class_value=r.classes().get(class_name); - if(!class_value) - throw Exception(PARSER_RUNTIME, - &class_name, - "class is undefined"); - - VStateless_class* lclass=class_value->get_class(); - if(!lclass) - throw Exception(PARSER_RUNTIME, - &class_name, - "class does not have methods"); - - const String& method_name=params.as_string(1, "method_name must be string"); - Method* method=lclass->get_method(method_name); - if(!method) - throw Exception(PARSER_RUNTIME, - &method_name, - "method not found in class %s", - class_name.cstr()); + if(!(dynamic_cast(&self) || dynamic_cast(&self))) + throw Exception(PARSER_RUNTIME, 0, "self must be parser object or class"); + + return *method.get_vjunction(self); +} + +static void _method(Request& r, MethodParams& params) { + Value &source=params[0]; + + if(Junction *j=source.get_junction()){ + if(Method* method=const_cast(j->method)){ + Value& self=params.count()>1 ? params.as_no_junction(1, "self must be object, not junction") : r.get_method_frame()->caller()->self(); + r.write(method_junction(self, *method)); + return; + } + throw Exception(PARSER_RUNTIME, 0, "param must be method junction"); + } + + if(params.count()==1) + throw Exception(PARSER_RUNTIME, 0, "method name must be specified"); + + const String& name=params.as_string(1, "method name must be string"); + + if(VStateless_class* vclass=source.get_class()) { + if(Method* method=vclass->get_method(name)){ + r.write( params.count()>2 ? method_junction(params.as_no_junction(2, "self must be object, not junction"), *method) : *method->get_vjunction(source) ); + return; + } + } + r.write_value(*VVoid::get()); +} + +static void _fields(Request& r, MethodParams& params) { + Value& o=params.as_no_junction(0, "param must be object or class, not junction"); + + if(HashStringValue* fields=o.get_fields()) + r.write(*new VHash(*fields)); + else + r.write(*new VHash()); +} + +static void _fields_reference(Request& r, MethodParams& params) { + Value& o=params.as_no_junction(0, "param must be object or hash, not junction"); + + if(HashStringValue* fields=o.get_fields_reference()) + r.write(*new VHashReference(*fields)); + else + throw Exception(PARSER_RUNTIME, 0, "param must be object or hash"); +} + +static void _field(Request& r, MethodParams& params) { + Value& o=params.as_no_junction(0, "first param must be object or class, not junction"); + const String& name=params.as_string(1, "field name must be string"); + + if(HashStringValue* fields=o.get_fields()) + if(Value* value=fields->get(name)) + r.write(*value); +} + +static void _method_info(Request& r, MethodParams& params) { + const Method* method; VHash& result=*new VHash; HashStringValue* hash=result.get_hash(); + + if(Junction *j=params[0].get_junction()){ + if(!(method=j->method)) + throw Exception(PARSER_RUNTIME, 0, "param must be class name or method junction"); + + hash->put(method_name, new VString(*method->name)); + hash->put(method_class_name, new VString(*new String(j->self.type()))); + + } else { + const String& class_name=params.as_string(0, "param must be class name or method junction"); + VStateless_class* vclass=r.get_class(class_name); + + if(!vclass) + throw Exception(PARSER_RUNTIME, &class_name, "class is undefined"); + + if(params.count()==1) + throw Exception(PARSER_RUNTIME, 0, "method name must be specified"); + + const String& method_name=params.as_string(1, "method name must be string"); + if(!(method=vclass->get_method(method_name))) + throw Exception(PARSER_RUNTIME, &method_name, "method not found in class '%s'", vclass->type()); + + Method* base_method; + if(vclass && vclass->base() && (base_method=vclass->base()->get_method(*method->name))){ + VStateless_class* c=vclass->base()->get_class(); + while(c->base() && base_method==c->base()->get_method(*method->name)) + c=c->base()->get_class(); + hash->put((base_method==method) ? method_inherited : method_overridden, new VString(*new String(c->type()))); + } + } + + Value* call_type=0; + switch(method->call_type){ + case Method::CT_DYNAMIC: + call_type=new VString(Symbols::DYNAMIC_SYMBOL); + break; + case Method::CT_STATIC: + call_type=new VString(Symbols::STATIC_SYMBOL); + break; + case Method::CT_ANY: + break; + } + if(call_type) + hash->put(method_call_type, call_type); + if(method->native_code){ // native code hash->put(method_min_params, new VInt(method->min_numbered_params_count)); hash->put(method_max_params, new VInt(method->max_numbered_params_count)); - const String* call_type; - switch(method->call_type){ - case Method::CT_DYNAMIC: - call_type=&method_call_type_dynamic; - break; - case Method::CT_STATIC: - call_type=&method_call_type_static; - break; - default: - call_type=&method_call_type_any; - } - hash->put(String("call_type"), new VString(*call_type)); - } else { // parser code + const String* filespec = r.get_method_filespec(method); + if( filespec ) + hash->put("file", new VString(*filespec)); + + hash->put(method_max_params, new VInt(method->params_names ? method->params_names->count() : 0)); + if(method->params_names) for(size_t i=0; iparams_names->count(); i++) hash->put(String::Body::Format(i), new VString(*method->params_names->get(i))); + + if(method->extra_params) + hash->put(method_extra_param, new VString(*method->extra_params)); + } + + r.write(result); +} + +static void _filename(Request& r, MethodParams& params) { + if(Junction *j=params[0].get_junction()){ + if(const Method* method=j->method){ + if(!method->native_code) + if(const String* filespec = r.get_method_filespec(method)) + r.write(*new VString(*filespec)); + return; + } + throw Exception(PARSER_RUNTIME, 0, "param must be object, class or method junction"); + } + + if(VClass* vclass = dynamic_cast(params[0].get_class())){ + r.write(*new VString(vclass->get_filespec())); + } +} + +static void _dynamical(Request& r, MethodParams& params) { + if(params.count()){ + r.write(VBool::get(params[0].get_class() != ¶ms[0])); + } else { + VMethodFrame* caller=r.get_method_frame()->caller(); + r.write(VBool::get(caller && caller->get_class() != &caller->self())); + } +} + +static void _is(Request& r, MethodParams& params) { + const String& name=params.as_string(0, "element name must be string"); + const String& type=params.as_string(1, "class name must be string"); + Value *context=params.count()==3 ? &(params.as_no_junction(2, "context must not be code")) : r.get_method_frame()->caller(); + Value *value=context ? context->get_element(name) : 0; + + if(value) { + if(type == "code" || type == "method") { + Junction *junction=value->get_junction(); + r.write(VBool::get(junction && ((junction->code==0) ^ (type == "code"))) ); + } else { + r.write(VBool::get( value->is(type.cstr()) )); + } + } else + r.write(VBool::get(type == "void")); +} + +static void _copy(Request& r, MethodParams& params) { + HashStringValue* src=params.as_no_junction(0, "source must not be code").get_hash(); + + if(src==NULL) + throw Exception(PARSER_RUNTIME, 0, "source must have hash representation"); + + Value& dst=params.as_no_junction(1, "destination must not be code"); + + for(HashStringValue::Iterator i(*src); i; i.next()) + r.put_element(dst, *new String(i.key(), String::L_TAINTED), i.value()); +} + +static void _uid(Request& r, MethodParams& params) { + Value& obj=params.as_no_junction(0, "object must not be code"); + + char local_buf[MAX_NUMBER]; + int size=snprintf(local_buf, sizeof(local_buf), "%p", &obj); + + r.write(*new String(String::C(pa_strdup(local_buf, (size_t)size), size))); +} + +static void _delete(Request&, MethodParams& params) { + Value* v=¶ms.as_no_junction(0, "param must be object or class, not junction"); + const String& key=params.as_string(1, "field name must be string"); + + if(VObject* o=dynamic_cast(v)){ + o->get_fields()->remove(key); + } else if(VClass* c=dynamic_cast(v)){ + HashStringProperty &p=*c->get_properties(); + if(Property* property=p.get(key)) + if(property->value) + p.remove(key); } +} - r.write_no_lang(result); +static void _mixin(Request& r, MethodParams& params) { + Value& vsource=params.as_no_junction(0, "source must not be code"); + + Value* vtarget=0; + const String *name=0; + bool copy_methods=true; + bool copy_fields=true; + bool overwrite=false; + + if(params.count()>1) + if(HashStringValue* options=params.as_hash(1, "mixin options")) { + int valid_options=0; + if(vtarget=options->get("to")) { + valid_options++; + } + if(Value* vname=options->get("name")) { + name=&vname->as_string(); + valid_options++; + } + if(Value* vmethods=options->get("methods")) { + copy_methods=r.process(*vmethods).as_bool(); + valid_options++; + } + if(Value* vfields=options->get("fields")) { + copy_fields=r.process(*vfields).as_bool(); + valid_options++; + } + if(Value* voverwrite=options->get("overwrite")) { + overwrite=r.process(*voverwrite).as_bool(); + valid_options++; + } + if(valid_options!=options->count()) + throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); + } + + if(!vtarget) + vtarget=&r.get_method_frame()->caller()->self(); + + VClass* source=dynamic_cast(vsource.get_class()); + VClass* target=dynamic_cast(vtarget->get_class()); + + if(!source) + throw Exception(PARSER_RUNTIME, 0, "source must be parser object or class"); + if(!target) + throw Exception(PARSER_RUNTIME, 0, "destination must be parser object or class"); + + if(name){ + if(copy_methods) + if(Method* method=source->get_method(*name)) + if(overwrite || !target->get_method(*name)){ + target->set_method(*name, new Method(*method)); + } + + if(copy_fields) + if(Property* property=source->get_properties()->get(*name)) + if(property->value && (overwrite || !target->get_properties()->get(*name))){ + target->put_element(*target, *name, property->value); + } + + } else { + if(copy_methods) + for(HashStringMethod::Iterator i(source->get_methods()); i; i.next()){ + if(overwrite || !target->get_method(i.key())) + target->set_method(*i.value()->name, new Method(*i.value())); + } + if(copy_fields) + for(HashStringProperty::Iterator i(*source->get_properties()); i; i.next()){ + if(i.value()->value && ( overwrite || !target->get_properties()->get(i.key()) )) + target->put_element(*target, *new String(i.key(), String::L_TAINTED), i.value()->value); + } + } } + // constructor MReflection::MReflection(): Methoded("reflection") { // ^reflection:create[class_name;constructor_name[;param1[;param2[;...]]]] - add_native_method("create", Method::CT_STATIC, _create, 2, 102); + add_native_method("create", Method::CT_STATIC, _create, 1, 101); // ^reflection:classes[] add_native_method("classes", Method::CT_STATIC, _classes, 0, 0); @@ -267,15 +464,57 @@ MReflection::MReflection(): Methoded("re // ^reflection:class_name[object] add_native_method("class_name", Method::CT_STATIC, _class_name, 1, 1); + // ^reflection:class_by_name[class_name] + add_native_method("class_by_name", Method::CT_STATIC, _class_by_name, 1, 1); + // ^reflection:base_class[object] add_native_method("base", Method::CT_STATIC, _base, 1, 1); // ^reflection:base_class_name[object] add_native_method("base_name", Method::CT_STATIC, _base_name, 1, 1); + // ^reflection:def[class|...;name] + add_native_method("def", Method::CT_STATIC, _def, 2, 2); + // ^reflection:methods[class_name] add_native_method("methods", Method::CT_STATIC, _methods, 1, 1); - // ^reflection:method_params[class_name;method_name] - add_native_method("method_params", Method::CT_STATIC, _method_params, 2, 2); + // ^reflection:method[object or class;method_name[;self]] + // ^reflection:method[junction[;self]] + add_native_method("method", Method::CT_STATIC, _method, 1, 3); + + // ^reflection:method_info[class_name;method_name] + // ^reflection:method_info[junction] + add_native_method("method_info", Method::CT_STATIC, _method_info, 1, 2); + + // ^reflection:filename[object or class] + add_native_method("filename", Method::CT_STATIC, _filename, 1, 1); + + // ^reflection:fields[object or class] + add_native_method("fields", Method::CT_STATIC, _fields, 1, 1); + + // ^reflection:fields_reference[object] + add_native_method("fields_reference", Method::CT_STATIC, _fields_reference, 1, 1); + + // ^reflection:field[object or class;field_name] + add_native_method("field", Method::CT_STATIC, _field, 2, 2); + + // ^reflection:dynamical[[object or class, caller if absent]] + add_native_method("dynamical", Method::CT_STATIC, _dynamical, 0, 1); + + // ^reflection:is[element_name;class_name|code|method[;context]] + add_native_method("is", Method::CT_STATIC, _is, 2, 3); + + // ^reflection:copy[src;dst] + add_native_method("copy", Method::CT_STATIC, _copy, 2, 2); + + // ^reflection:uid[object or class] + add_native_method("uid", Method::CT_STATIC, _uid, 1, 1); + + // ^reflection:delete[object or class;field_name] + add_native_method("delete", Method::CT_STATIC, _delete, 2, 2); + + // ^reflection:mixin[object or class or junction;options] + add_native_method("mixin", Method::CT_STATIC, _mixin, 1, 2); + }