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| version 1.202, 2001/11/01 16:27:20 | version 1.256, 2002/08/21 10:18:35 |
|---|---|
| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: executor part of request class. | Parser: executor part of request class. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| $Id$ | |
| */ | */ |
| static const char* IDENT_EXECUTE_C="$Date$"; | |
| #include "pa_opcode.h" | #include "pa_opcode.h" |
| #include "pa_array.h" | #include "pa_array.h" |
| #include "pa_request.h" | #include "pa_request.h" |
| Line 24 | Line 24 |
| #include "pa_wwrapper.h" | #include "pa_wwrapper.h" |
| //#define DEBUG_EXECUTE | //#define DEBUG_EXECUTE |
| //#define DEBUG_STRING_APPENDS_VS_EXPANDS | |
| #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS | |
| ulong wcontext_result_size=0; | |
| #endif | |
| const uint ANTI_ENDLESS_EXECUTE_RECOURSION=200; | |
| #ifdef DEBUG_EXECUTE | #ifdef DEBUG_EXECUTE |
| char *opcode_name[]={ | char *opcode_name[]={ |
| // literals | // literals |
| "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM", | "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM", |
| "NESTED_CODE", | |
| // actions | // actions |
| "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE", | "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE", |
| "GET_CLASS", | "GET_CLASS", |
| "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT", | "CONSTRUCT_VALUE", "CONSTRUCT_EXPR", "CURLY_CODE__CONSTRUCT", |
| "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE", | "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE", |
| "GET_ELEMENT", "GET_ELEMENT__WRITE", | "GET_ELEMENT_OR_OPERATOR", "GET_ELEMENT", "GET_ELEMENT__WRITE", |
| "CREATE_EWPOOL", "REDUCE_EWPOOL", | "OBJECT_POOL", "STRING_POOL", |
| "CREATE_SWPOOL", "REDUCE_SWPOOL", | |
| "GET_METHOD_FRAME", | |
| "STORE_PARAM", | "STORE_PARAM", |
| "PREPARE_TO_CONSTRUCT_OBJECT", "CALL", | "PREPARE_TO_CONSTRUCT_OBJECT", "PREPARE_TO_EXPRESSION", |
| "CALL", "CALL__WRITE", | |
| // expression ops: unary | // expression ops: unary |
| "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS", | "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS", |
| Line 89 void debug_dump(Pool& pool, int level, c | Line 95 void debug_dump(Pool& pool, int level, c |
| case OP_CURLY_CODE__STORE_PARAM: | case OP_CURLY_CODE__STORE_PARAM: |
| case OP_EXPR_CODE__STORE_PARAM: | case OP_EXPR_CODE__STORE_PARAM: |
| case OP_CURLY_CODE__CONSTRUCT: | case OP_CURLY_CODE__CONSTRUCT: |
| case OP_NESTED_CODE: | |
| case OP_OBJECT_POOL: | |
| case OP_STRING_POOL: | |
| case OP_CALL: | |
| const Array *local_ops=reinterpret_cast<const Array *>(i.next()); | const Array *local_ops=reinterpret_cast<const Array *>(i.next()); |
| debug_dump(pool, level+1, *local_ops); | debug_dump(pool, level+1, *local_ops); |
| } | } |
| Line 99 void debug_dump(Pool& pool, int level, c | Line 109 void debug_dump(Pool& pool, int level, c |
| #define PUSH(value) stack.push(value) | #define PUSH(value) stack.push(value) |
| #define POP() static_cast<Value *>(stack.pop()) | #define POP() static_cast<Value *>(stack.pop()) |
| #define POP_NAME() static_cast<Value *>(stack.pop())->as_string() | #define POP_NAME() static_cast<Value *>(stack.pop())->as_string() |
| #define POP_CODE() static_cast<Array *>(stack.pop()) | |
| /** | |
| Helps preventing evaluation of junctions in outdated context | |
| To stop situations like this: | |
| @code | |
| @main[] | |
| ^method1[] | |
| ^method2[] | |
| @method1[] | |
| $junction{ | |
| some code | |
| } | |
| @method2[] | |
| ^junction[] | |
| @endcode | |
| All Junctions, generated by OP_CURLY_CODE__CONSTRUCT are registered here, | |
| and on scope exit got cleaned - there Junction::root becomes 0, | |
| which later in Request::process triggers exception | |
| */ | |
| class Auto_junction_cleaner { | |
| public: | |
| Auto_junction_cleaner () : junctions(0) {} | |
| ~Auto_junction_cleaner () { | |
| if(junctions) { | |
| Array_iter i(*junctions); | |
| while(i.has_next()) | |
| static_cast<Junction *>(i.next())->change_context(0); | |
| // someday free junctions | |
| } | |
| } | |
| void register_junction(Pool& apool, Junction& ajunction) { | |
| if(!junctions) | |
| junctions=new(apool) Array(apool); | |
| if(junctions) | |
| *junctions+=&ajunction; | |
| } | |
| private: | |
| Array *junctions; | |
| }; | |
| void Request::execute(const Array& ops) { | void Request::execute(const Array& ops) { |
| // _asm int 3; | // _asm int 3; |
| Line 108 void Request::execute(const Array& ops) | Line 162 void Request::execute(const Array& ops) |
| debug_printf(pool(), "execution-------------------------\n"); | debug_printf(pool(), "execution-------------------------\n"); |
| #endif | #endif |
| Auto_junction_cleaner junction_cleaner; | |
| const String *last_get_element_name=0; | |
| Array_iter i(ops); | Array_iter i(ops); |
| while(i.has_next()) { | while(i.has_next()) { |
| Operation op; | Operation op; |
| Line 118 void Request::execute(const Array& ops) | Line 175 void Request::execute(const Array& ops) |
| Value *value; | Value *value; |
| Value *a; Value *b; | Value *a; Value *b; |
| Array *b_code; | |
| switch(op.code) { | switch(op.code) { |
| // param in next instruction | // param in next instruction |
| case OP_VALUE: | case OP_VALUE: |
| Line 129 void Request::execute(const Array& ops) | Line 187 void Request::execute(const Array& ops) |
| PUSH(value); | PUSH(value); |
| break; | break; |
| } | } |
| case OP_CURLY_CODE__STORE_PARAM: | |
| case OP_EXPR_CODE__STORE_PARAM: | |
| { | |
| VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value()); | |
| // code | |
| const Array *local_ops=reinterpret_cast<const Array *>(i.next()); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), " (%d)\n", local_ops->size()); | |
| debug_dump(pool(), 1, *local_ops); | |
| #endif | |
| // when they evaluate expression parameter, | |
| // the object expression result | |
| // does not need to be written into calling frame | |
| // it must go into any expressions using that parameter | |
| // hence, we zero junction.wcontext here, and later | |
| // in .process we would test that field | |
| // in decision "which wwrapper to use" | |
| Junction& j=*NEW Junction(pool(), | |
| *self, 0, 0, | |
| root, | |
| rcontext, | |
| op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext, | |
| local_ops); | |
| value=NEW VJunction(j); | |
| // store param | |
| frame->store_param(frame->name(), value); | |
| break; | |
| } | |
| case OP_GET_CLASS: | case OP_GET_CLASS: |
| { | { |
| // maybe they do ^class:method[] call, remember the fact | // maybe they do ^class:method[] call, remember the fact |
| Line 167 void Request::execute(const Array& ops) | Line 195 void Request::execute(const Array& ops) |
| const String& name=POP_NAME(); | const String& name=POP_NAME(); |
| value=static_cast<Value *>(classes().get(name)); | value=static_cast<Value *>(classes().get(name)); |
| if(!value) | if(!value) |
| throw Exception(0,0, | throw Exception("parser.runtime", |
| &name, | &name, |
| "class is undefined"); | "class is undefined"); |
| Line 203 void Request::execute(const Array& ops) | Line 231 void Request::execute(const Array& ops) |
| value=POP(); | value=POP(); |
| const String& name=POP_NAME(); | const String& name=POP_NAME(); |
| Value *ncontext=POP(); | Value *ncontext=POP(); |
| ncontext->put_element(name, value); | ncontext->put_element(name, value, false); |
| value->set_name(name); | |
| break; | break; |
| } | } |
| case OP_CONSTRUCT_EXPR: | case OP_CONSTRUCT_EXPR: |
| { | { |
| // see OP_PREPARE_TO_EXPRESSION | |
| wcontext->set_in_expression(false); | |
| value=POP(); | value=POP(); |
| const String& name=POP_NAME(); | const String& name=POP_NAME(); |
| Value *ncontext=POP(); | Value *ncontext=POP(); |
| ncontext->put_element(name, value->as_expr_result()); | ncontext->put_element(name, value->as_expr_result(), false); |
| value->set_name(name); | |
| break; | break; |
| } | } |
| case OP_CURLY_CODE__CONSTRUCT: | case OP_CURLY_CODE__CONSTRUCT: |
| Line 229 void Request::execute(const Array& ops) | Line 258 void Request::execute(const Array& ops) |
| rcontext, | rcontext, |
| wcontext, | wcontext, |
| local_ops); | local_ops); |
| junction_cleaner.register_junction(pool(), j); | |
| value=NEW VJunction(j); | value=NEW VJunction(j); |
| const String& name=POP_NAME(); | const String& name=POP_NAME(); |
| Value *ncontext=POP(); | Value *ncontext=POP(); |
| ncontext->put_element(name, value); | ncontext->put_element(name, value, false); |
| value->set_name(name); | break; |
| } | |
| case OP_NESTED_CODE: | |
| { | |
| Array *local_ops=static_cast<Array *>(i.next()); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), " (%d)\n", local_ops->size()); | |
| debug_dump(pool(), 1, *local_ops); | |
| #endif | |
| PUSH(local_ops); | |
| break; | break; |
| } | } |
| case OP_WRITE_VALUE: | case OP_WRITE_VALUE: |
| { | { |
| value=POP(); | value=POP(); |
| write_assign_lang(*value); | write_assign_lang(*value, last_get_element_name); |
| // forget the fact they've entered some ^object.method[]. | |
| // see OP_GET_ELEMENT | |
| wcontext->set_somebody_entered_some_object(false); | |
| break; | break; |
| } | } |
| case OP_WRITE_EXPR_RESULT: | case OP_WRITE_EXPR_RESULT: |
| { | { |
| value=POP(); | value=POP(); |
| write_expr_result(*value->as_expr_result()); | write_no_lang(*value->as_expr_result()); |
| // must be after write(result) and | |
| // see OP_PREPARE_TO_EXPRESSION | |
| wcontext->set_in_expression(false); | |
| break; | break; |
| } | } |
| case OP_STRING__WRITE: | case OP_STRING__WRITE: |
| Line 263 void Request::execute(const Array& ops) | Line 302 void Request::execute(const Array& ops) |
| break; | break; |
| } | } |
| case OP_GET_ELEMENT_OR_OPERATOR: | |
| { | |
| //_asm int 3; | |
| value=get_element(last_get_element_name, true); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_GET_ELEMENT: | case OP_GET_ELEMENT: |
| { | { |
| // maybe they do ^object.method[] call, remember the fact | |
| wcontext->set_somebody_entered_some_object(true); | |
| //_asm int 3; | //_asm int 3; |
| value=get_element(); | value=get_element(last_get_element_name, false); |
| PUSH(value); | PUSH(value); |
| break; | break; |
| } | } |
| case OP_GET_ELEMENT__WRITE: | case OP_GET_ELEMENT__WRITE: |
| { | { |
| value=get_element(); | value=get_element(last_get_element_name/*not followed by call, not needed really*/, false); |
| write_assign_lang(*value); | write_assign_lang(*value, last_get_element_name); |
| break; | break; |
| } | } |
| case OP_CREATE_EWPOOL: | case OP_OBJECT_POOL: |
| { | { |
| const Array *local_ops=reinterpret_cast<const Array *>(i.next()); | |
| PUSH(wcontext); | PUSH(wcontext); |
| PUSH((void *)flang); | PUSH((void *)flang); |
| flang=String::UL_PASS_APPENDED; | flang=String::UL_PASS_APPENDED; |
| wcontext=NEW WWrapper(pool(), 0 /*empty*/); | WWrapper local(pool(), 0 /*empty*/); |
| break; | wcontext=&local; |
| } | |
| case OP_REDUCE_EWPOOL: | execute(*local_ops); |
| { | |
| value=wcontext->result(); | value=&wcontext->result().as_value(); |
| flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP())); | flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP())); |
| wcontext=static_cast<WContext *>(POP()); | wcontext=static_cast<WContext *>(POP()); |
| PUSH(value); | PUSH(value); |
| break; | break; |
| } | } |
| case OP_CREATE_SWPOOL: | case OP_STRING_POOL: |
| { | { |
| const Array *local_ops=reinterpret_cast<const Array *>(i.next()); | |
| PUSH(wcontext); | PUSH(wcontext); |
| wcontext=NEW WWrapper(pool(), 0 /*empty*/); | WWrapper local(pool(), 0 /*empty*/); |
| break; | wcontext=&local; |
| } | |
| case OP_REDUCE_SWPOOL: | execute(*local_ops); |
| { | |
| // from "$a $b" part of expression taking only string value, | // from "$a $b" part of expression taking only string value, |
| // ignoring any other content of wcontext | // ignoring any other content of wcontext |
| const String *string=wcontext->get_string(); | const String *string=wcontext->get_string(); |
| Line 321 void Request::execute(const Array& ops) | Line 368 void Request::execute(const Array& ops) |
| } | } |
| // CALL | // CALL |
| case OP_GET_METHOD_FRAME: | case OP_STORE_PARAM: |
| { | { |
| value=POP(); | value=POP(); |
| VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value()); | |
| // info: | // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0 |
| // code compiled so that this one's always method-junction, | frame->store_param(value); |
| // not a code-junction | |
| Junction *junction=value->get_junction(); | |
| if(!junction) | |
| throw Exception(0, 0, | |
| &value->name(), | |
| "(%s) not a method or junction, can not call it", | |
| value->type()); | |
| VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction); | |
| PUSH(frame); | |
| break; | break; |
| } | } |
| case OP_STORE_PARAM: | case OP_CURLY_CODE__STORE_PARAM: |
| case OP_EXPR_CODE__STORE_PARAM: | |
| { | { |
| value=POP(); | // code |
| const Array *local_ops=reinterpret_cast<const Array *>(i.next()); | |
| VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value()); | VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value()); |
| frame->store_param(frame->name(), value); | #ifdef DEBUG_EXECUTE |
| debug_printf(pool(), " (%d)\n", local_ops->size()); | |
| debug_dump(pool(), 1, *local_ops); | |
| #endif | |
| // when they evaluate expression parameter, | |
| // the object expression result | |
| // does not need to be written into calling frame | |
| // it must go into any expressions using that parameter | |
| // hence, we zero junction.wcontext here, and later | |
| // in .process we would test that field | |
| // in decision "which wwrapper to use" | |
| Junction& j=*NEW Junction(pool(), | |
| *self, 0, 0, | |
| root, | |
| rcontext, | |
| op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext, | |
| local_ops); | |
| value=NEW VJunction(j); | |
| // store param | |
| // this op is executed from CALL local_ops only, so can not check method_frame_to_fill==0 | |
| frame->store_param(value); | |
| break; | break; |
| } | } |
| Line 352 void Request::execute(const Array& ops) | Line 413 void Request::execute(const Array& ops) |
| wcontext->set_constructing(true); | wcontext->set_constructing(true); |
| break; | break; |
| } | } |
| case OP_PREPARE_TO_EXPRESSION: | |
| { | |
| wcontext->set_in_expression(true); | |
| break; | |
| } | |
| case OP_CALL: | case OP_CALL: |
| case OP_CALL__WRITE: | |
| { | { |
| Array *local_ops=static_cast<Array *>(i.next()); | |
| #ifdef DEBUG_EXECUTE | #ifdef DEBUG_EXECUTE |
| debug_printf(pool(), " (%d)\n", local_ops->size()); | |
| debug_dump(pool(), 1, *local_ops); | |
| debug_printf(pool(), "->\n"); | debug_printf(pool(), "->\n"); |
| #endif | #endif |
| VMethodFrame *frame=static_cast<VMethodFrame *>(POP()); | value=POP(); |
| frame->fill_unspecified_params(); | |
| // info: | |
| // code compiled so that this one's always method-junction, | |
| // not a code-junction | |
| Junction *junction=value->get_junction(); | |
| if(!junction) | |
| throw Exception("parser.runtime", | |
| last_get_element_name, | |
| "(%s) not a method or junction, can not call it", | |
| value->type()); | |
| VMethodFrame frame(pool(), *last_get_element_name, *junction); | |
| if(local_ops){ // store param code goes here | |
| PUSH(&frame); // argument for *STORE_PARAM ops | |
| execute(*local_ops); | |
| POP(); | |
| } | |
| frame.fill_unspecified_params(); | |
| PUSH(self); | PUSH(self); |
| PUSH(root); | PUSH(root); |
| PUSH(rcontext); | PUSH(rcontext); |
| PUSH(wcontext); | PUSH(wcontext); |
| VStateless_class *called_class=frame->junction.self.get_class(); | VStateless_class *called_class=frame.junction.self.get_class(); |
| if(wcontext->get_constructing()) { | if(wcontext->get_constructing()) { |
| wcontext->set_constructing(false); | wcontext->set_constructing(false); |
| if(frame->junction.method->call_type!=Method::CT_STATIC) { | if(frame.junction.method->call_type!=Method::CT_STATIC) { |
| // this is a constructor call | // this is a constructor call |
| if(Value *value=called_class->create_new_value(pool())) { | if(Value *value=called_class->create_new_value(pool())) { |
| // some stateless_object creatable derivates | // some stateless_class creatable derivates |
| self=value; | self=value; |
| } else { | } else |
| // stateful object | throw Exception("parser.runtime", |
| self=NEW VObject(pool(), *called_class); | &frame.name(), |
| } | "is not a constructor, system class '%s' can be constructed only implicitly", |
| frame->write(*self, | called_class->name().cstr()); |
| frame.write(*self, | |
| String::UL_CLEAN // not used, always an object, not string | String::UL_CLEAN // not used, always an object, not string |
| ); | ); |
| } else | } else |
| throw Exception(0, 0, | throw Exception("parser.runtime", |
| &frame->name(), | &frame.name(), |
| "method is static and can not be used as constructor"); | "method is static and can not be used as constructor"); |
| } else { | } else |
| // this is not constructor call | self=&frame.junction.self; |
| // not ^name.method call, name:method call; and | frame.set_self(*self); |
| // is context object or class & is it my class or my parent's class and? | |
| VStateless_class *read_class=rcontext->get_class(); | |
| if( | |
| !(wcontext->get_somebody_entered_some_object() && | |
| !wcontext->get_somebody_entered_some_class()) && | |
| read_class && read_class->is_or_derived_from(*called_class)) // yes | |
| self=rcontext; // dynamic call | |
| else // no, not me or relative of mine (=total stranger) | |
| self=&frame->junction.self; // static call | |
| } | |
| frame->set_self(*self); | // see OP_PREPARE_TO_EXPRESSION |
| rcontext=wcontext=frame; | frame.set_in_expression(wcontext->get_in_expression()); |
| rcontext=wcontext=&frame; | |
| { | { |
| // take object or class from any wrappers | const Method& method=*frame.junction.method; |
| // and substitute class alias to the class they are called AS | |
| Temp_alias temp_alias(*self->get_aliased(), *frame->junction.vclass); | |
| const Method& method=*frame->junction.method; | |
| Method::Call_type call_type= | Method::Call_type call_type= |
| called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC; | called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC; |
| if( | if( |
| Line 416 void Request::execute(const Array& ops) | Line 496 void Request::execute(const Array& ops) |
| if(method.native_code) { // native code? | if(method.native_code) { // native code? |
| // root unchanged, so that ^for ^foreach & co may write to locals | // root unchanged, so that ^for ^foreach & co may write to locals |
| method.check_actual_numbered_params( | method.check_actual_numbered_params( |
| frame->junction.self, | frame.junction.self, |
| frame->name(), frame->numbered_params()); | frame.name(), frame.numbered_params()); |
| method.native_code( | method.native_code( |
| *this, | *this, |
| frame->name(), frame->numbered_params()); // execute it | frame.name(), frame.numbered_params()); // execute it |
| } else { // parser code | } else { // parser code |
| root=frame; | root=&frame; |
| if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) { | // execute it |
| anti_endless_execute_recoursion=0; // give @exception a chance | recoursion_checked_execute(&frame.name(), *method.parser_code); |
| throw Exception(0, 0, | |
| &frame->name(), | |
| "endless recursion detected"); | |
| } | |
| execute(*method.parser_code); // execute it | |
| anti_endless_execute_recoursion--; | |
| } | } |
| } catch(...) { | } catch(...) { |
| // record it to stack trace | // record it to stack trace |
| trace.push((void *)&frame->name()); | exception_trace.push((void *)&frame.name()); |
| /*re*/throw; | /*re*/throw; |
| } | } |
| } else | } else |
| throw Exception(0, 0, | throw Exception("parser.runtime", |
| &frame->name(), | &frame.name(), |
| "is not allowed to be called %s", | "is not allowed to be called %s", |
| call_type==Method::CT_STATIC?"statically":"dynamically"); | call_type==Method::CT_STATIC?"statically":"dynamically"); |
| } | } |
| value=wcontext->result(); | StringOrValue result=wcontext->result(); |
| wcontext=static_cast<WContext *>(POP()); | wcontext=static_cast<WContext *>(POP()); |
| rcontext=POP(); | rcontext=POP(); |
| root=POP(); | root=POP(); |
| self=static_cast<VAliased *>(POP()); | self=static_cast<Value *>(POP()); |
| PUSH(value); | #ifdef DEBUG_STRING_APPENDS_VS_EXPANDS |
| if(const String *s=value->get_string()) | |
| wcontext_result_size+=s->used_rows()*sizeof(String::Chunk::Row); | |
| #endif | |
| if(op.code==OP_CALL__WRITE) { | |
| write_assign_lang(result, last_get_element_name); | |
| } else { // OP_CALL | |
| PUSH(&result.as_value()); | |
| } | |
| #ifdef DEBUG_EXECUTE | #ifdef DEBUG_EXECUTE |
| debug_printf(pool(), "<-returned"); | debug_printf(pool(), "<-returned"); |
| #endif | #endif |
| Line 546 void Request::execute(const Array& ops) | Line 629 void Request::execute(const Array& ops) |
| if(b_double == 0) { | if(b_double == 0) { |
| const String *problem_source=&b->as_string(); | const String *problem_source=&b->as_string(); |
| #ifndef NO_STRING_ORIGIN | throw Exception("number.zerodivision", |
| if(!problem_source->origin().file) | |
| problem_source=&b->name(); | |
| #endif | |
| throw Exception(0, 0, | |
| problem_source, | problem_source, |
| "Division by zero"); | "Division by zero"); |
| } | } |
| Line 568 void Request::execute(const Array& ops) | Line 647 void Request::execute(const Array& ops) |
| if(b_double == 0) { | if(b_double == 0) { |
| const String *problem_source=&b->as_string(); | const String *problem_source=&b->as_string(); |
| #ifndef NO_STRING_ORIGIN | throw Exception("number.zerodivision", |
| if(!problem_source->origin().file) | |
| problem_source=&b->name(); | |
| #endif | |
| throw Exception(0, 0, | |
| problem_source, | problem_source, |
| "Modulus by zero"); | "Modulus by zero"); |
| } | } |
| Line 590 void Request::execute(const Array& ops) | Line 665 void Request::execute(const Array& ops) |
| if(b_int == 0) { | if(b_int == 0) { |
| const String *problem_source=&b->as_string(); | const String *problem_source=&b->as_string(); |
| #ifndef NO_STRING_ORIGIN | throw Exception("number.zerodivision", |
| if(!problem_source->origin().file) | |
| problem_source=&b->name(); | |
| #endif | |
| throw Exception(0, 0, | |
| problem_source, | problem_source, |
| "Division by zero"); | "Division by zero"); |
| } | } |
| Line 632 void Request::execute(const Array& ops) | Line 703 void Request::execute(const Array& ops) |
| } | } |
| case OP_LOG_AND: | case OP_LOG_AND: |
| { | { |
| b=POP(); a=POP(); | b_code=POP_CODE(); a=POP(); |
| value=NEW VBool(pool(), a->as_bool() && b->as_bool()); | bool result; |
| if(a->as_bool()) { | |
| execute(*b_code); | |
| b=POP(); | |
| result=b->as_bool(); | |
| } else | |
| result=false; | |
| value=NEW VBool(pool(), result); | |
| PUSH(value); | PUSH(value); |
| break; | break; |
| } | } |
| case OP_LOG_OR: | case OP_LOG_OR: |
| { | { |
| b=POP(); a=POP(); | b_code=POP_CODE(); a=POP(); |
| value=NEW VBool(pool(), a->as_bool() || b->as_bool()); | bool result; |
| if(a->as_bool()) | |
| result=true; | |
| else { | |
| execute(*b_code); | |
| b=POP(); | |
| result=b->as_bool(); | |
| } | |
| value=NEW VBool(pool(), result); | |
| PUSH(value); | PUSH(value); |
| break; | break; |
| } | } |
| Line 737 void Request::execute(const Array& ops) | Line 823 void Request::execute(const Array& ops) |
| } | } |
| case OP_IS: | case OP_IS: |
| { | { |
| //_asm int 3; | |
| b=POP(); a=POP(); | b=POP(); a=POP(); |
| value=NEW VBool(pool(), b->as_string() == a->type()); | value=NEW VBool(pool(), a->is(b->as_string().cstr())); |
| PUSH(value); | PUSH(value); |
| break; | break; |
| } | } |
| default: | default: |
| throw Exception(0,0, | throw Exception(0, |
| 0, | 0, |
| "invalid opcode %d", op.code); | "invalid opcode %d", op.code); |
| } | } |
| } | } |
| } | } |
| Value *Request::get_element() { | /// @test cache|prepare junctions |
| const String& name=POP_NAME(); | Value *Request::get_element(const String *& remember_name, bool can_call_operator) { |
| const String& name=POP_NAME(); remember_name=&name; | |
| Value *ncontext=POP(); | Value *ncontext=POP(); |
| Value *value=ncontext->get_element(name); | Value *value=0; |
| if(!value) | if(can_call_operator) { |
| if(Method* method=OP.get_method(name)) { // maybe operator? | if(Method* method=OP.get_method(name)) { // looking operator of that name FIRST |
| // as if that method were in self and we have normal dynamic method here | // as if that method were in self and we have normal dynamic method here |
| Junction& junction=*NEW Junction(pool(), | Junction& junction=*NEW Junction(pool(), |
| *root, self->get_class(), method, 0,0,0,0); | *root, self->get_class(), method, 0,0,0,0); |
| value=NEW VJunction(junction); | value=NEW VJunction(junction); |
| } | } |
| } | |
| if(!value) { | |
| if(!wcontext->get_constructing() // not constructing | |
| && wcontext->get_somebody_entered_some_class() ) // ^class:method | |
| if(VStateless_class *called_class=ncontext->get_class()) | |
| if(VStateless_class *read_class=rcontext->get_class()) | |
| if(read_class->derived_from(*called_class)) // current derived from called | |
| if(Value *base_object=self->base_object()) { // doing DYNAMIC call | |
| Temp_derived temp_derived(*base_object, 0); // temporarily prevent go-back-down virtual calls | |
| value=base_object->get_element(name, base_object, false); // virtual-up lookup starting from parent | |
| goto _void; | |
| } | |
| } | |
| if(!value) | |
| value=ncontext->get_element(name, ncontext, false); | |
| _void: | |
| if(value) | if(value) |
| value=&process(*value, &name); // process possible code-junction | value=&process_to_value(*value); // process possible code-junction |
| else { | else |
| value=NEW VVoid(pool()); | value=NEW VVoid(pool()); |
| value->set_name(name); | |
| } | |
| return value; | return value; |
| } | } |
| Line 781 Value *Request::get_element() { | Line 882 Value *Request::get_element() { |
| they want any result[string|object] | they want any result[string|object] |
| nothing goes to wcontext. | nothing goes to wcontext. |
| used in @c (expression) params evaluation | used in @c (expression) params evaluation |
| using the fact it's either string_ or value_ result requested to speed up checkes | |
| */ | */ |
| Value& Request::process(Value& value, const String *name, bool intercept_string) { | StringOrValue Request::process(Value& input_value, bool intercept_string) { |
| Value *result; | StringOrValue result; |
| Junction *junction=value.get_junction(); | Junction *junction=input_value.get_junction(); |
| if(junction && junction->code) { // is it a code-junction? | if(junction && junction->code) { // is it a code-junction? |
| // process it | // process it |
| #ifdef DEBUG_EXECUTE | #ifdef DEBUG_EXECUTE |
| debug_printf(pool(), "ja->\n"); | debug_printf(pool(), "ja->\n"); |
| #endif | #endif |
| if(!junction->root) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "junction used outside of context"); | |
| PUSH(self); | PUSH(self); |
| PUSH(root); | PUSH(root); |
| PUSH(rcontext); | PUSH(rcontext); |
| PUSH(wcontext); | PUSH(wcontext); |
| WContext *frame; | self=&junction->self; |
| root=junction->root; | |
| rcontext=junction->rcontext; | |
| // for expression method params | // for expression method params |
| // wcontext is set 0 | // wcontext is set 0 |
| // using the fact in decision "which wwrapper to use" | // using the fact in decision "which wwrapper to use" |
| Line 803 Value& Request::process(Value& value, co | Line 915 Value& Request::process(Value& value, co |
| if(using_code_frame) { | if(using_code_frame) { |
| // almost plain wwrapper about junction wcontext, | // almost plain wwrapper about junction wcontext, |
| // BUT intercepts string writes | // BUT intercepts string writes |
| frame=NEW VCodeFrame(pool(), *junction->wcontext); | VCodeFrame local(pool(), *junction->wcontext); |
| } else { | wcontext=&local; |
| // plain wwrapper | |
| frame=NEW WWrapper(pool(), 0/*empty*/); | // execute it |
| } | recoursion_checked_execute(0/*result_name*/, *junction->code); |
| //frame->set_name(value.name()); | |
| wcontext=frame; | |
| self=&junction->self; | |
| root=junction->root; | |
| rcontext=junction->rcontext; | |
| execute(*junction->code); | |
| if(using_code_frame) { | |
| // CodeFrame soul: | // CodeFrame soul: |
| // string writes were intercepted | // string writes were intercepted |
| // returning them as the result of getting code-junction | // returning them as the result of getting code-junction |
| result=NEW VString(*frame->get_string()); | result.set_string(*wcontext->get_string()); |
| } else | } else { |
| result=frame->result(); | // plain wwrapper |
| WWrapper local(pool(), 0/*empty*/); | |
| wcontext=&local; | |
| // execute it | |
| recoursion_checked_execute(0/*result_name*/, *junction->code); | |
| result=wcontext->result(); | |
| } | |
| wcontext=static_cast<WContext *>(POP()); | wcontext=static_cast<WContext *>(POP()); |
| rcontext=POP(); | rcontext=POP(); |
| root=POP(); | root=POP(); |
| self=static_cast<VAliased *>(POP()); | self=static_cast<Value *>(POP()); |
| #ifdef DEBUG_EXECUTE | #ifdef DEBUG_EXECUTE |
| debug_printf(pool(), "<-ja returned"); | debug_printf(pool(), "<-ja returned"); |
| #endif | #endif |
| } else | } else { |
| result=&value; | result.set_value(input_value); |
| } | |
| if(name) | return result; |
| result->set_name(*name); | |
| return *result; | |
| } | } |
| const String *Request::execute_method(Value& aself, const Method& method, | const String& Request::execute_method(VMethodFrame& amethodFrame, const Method& method) { |
| bool return_cstr) { | |
| PUSH(self); | PUSH(self); |
| PUSH(root); | PUSH(root); |
| PUSH(rcontext); | PUSH(rcontext); |
| PUSH(wcontext); | PUSH(wcontext); |
| // initialize contexts | // initialize contexts |
| root=rcontext=self=&aself; | root=rcontext=self=&amethodFrame; |
| wcontext=NEW WWrapper(pool(), &aself); | wcontext=&amethodFrame; |
| // execute! | // execute! |
| execute(*method.parser_code); | execute(*method.parser_code); |
| // result | // result |
| const String *result; | const String& result=wcontext->result().as_string(); |
| if(return_cstr) | |
| result=&wcontext->as_string(); | |
| else | |
| result=0; // ignore result | |
| wcontext=static_cast<WContext *>(POP()); | wcontext=static_cast<WContext *>(POP()); |
| rcontext=POP(); | rcontext=POP(); |
| root=POP(); | root=POP(); |
| self=static_cast<VAliased *>(POP()); | self=static_cast<Value *>(POP()); |
| // return | // return |
| return result; | return result; |
| } | } |
| void Request::execute_method(Value& aself, | |
| const Method& method, VString *optional_param, | |
| const String **return_string) { | |
| PUSH(self); | |
| PUSH(root); | |
| PUSH(rcontext); | |
| PUSH(wcontext); | |
| // initialize contexts | |
| //root=rcontext=self=&aself; | |
| self=&aself; | |
| // WWrapper local(pool(), &aself); | |
| // wcontext=&local; | |
| Junction local_junction(pool(), *self, self->get_class(), &method, 0,0,0,0); | |
| VMethodFrame local_frame(pool(), method.name, local_junction); | |
| if(optional_param && local_frame.can_store_param()) { | |
| local_frame.store_param(optional_param); | |
| local_frame.fill_unspecified_params(); | |
| } | |
| local_frame.set_self(*self); | |
| root=rcontext=wcontext=&local_frame; | |
| // prevent non-string writes for better error reporting | |
| if(return_string) | |
| wcontext->write(local_frame); | |
| // execute! | |
| execute(*method.parser_code); | |
| // result | |
| const String *result=0; | |
| if(return_string) | |
| *return_string=&wcontext->result().as_string(); | |
| wcontext=static_cast<WContext *>(POP()); | |
| rcontext=POP(); | |
| root=POP(); | |
| self=static_cast<Value *>(POP()); | |
| } | |
| void Request::execute_nonvirtual_method(VStateless_class& aclass, | |
| const String& method_name, VString *optional_param, | |
| const String **return_string, | |
| const Method **return_method) { | |
| const Method *method=aclass.get_method(method_name); | |
| if(return_string) | |
| *return_string=0; | |
| if(return_method) | |
| *return_method=method; | |
| if(method) | |
| execute_method(aclass, *method, optional_param, return_string); | |
| } | |
| const String *Request::execute_virtual_method(Value& aself, | const String *Request::execute_virtual_method(Value& aself, |
| const String& method_name, | const String& method_name) { |
| bool return_cstr) { | if(Value *value=aself.get_element(method_name, &aself, false)) |
| if(Value *value=aself.get_element(method_name)) | |
| if(Junction *junction=value->get_junction()) | if(Junction *junction=value->get_junction()) |
| if(const Method *method=junction->method) | if(const Method *method=junction->method) { |
| return execute_method(aself, *method, return_cstr); | const String *result; |
| execute_method(aself, *method, 0/*no params*/, &result); | |
| return result; | |
| } | |
| return 0; | return 0; |
| } | } |
| const String *Request::execute_nonvirtual_method(VStateless_class& aclass, | |
| const String& method_name, | |
| bool return_cstr) { | |
| if(const Method *method=aclass.get_method(method_name)) | |
| return execute_method(aclass, *method, return_cstr); | |
| return 0; | |
| } |