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| version 1.2, 2001/02/20 19:21:13 | version 1.172, 2001/06/29 14:16:29 |
|---|---|
| Line 1 | Line 1 |
| /* | /** @file |
| $Id$ | Parser: executor part of request class. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | |
| */ | */ |
| static const char *RCSId="$Id$"; | |
| #include "pa_array.h" | #include "pa_opcode.h" |
| #include "code.h" | #include "pa_array.h" |
| #include "pa_request.h" | |
| #include "pa_vstring.h" | |
| #include "pa_vhash.h" | |
| #include "pa_vvoid.h" | |
| #include "pa_vcode_frame.h" | |
| #include "pa_vmethod_frame.h" | |
| #include "pa_vobject.h" | |
| #include "pa_vdouble.h" | |
| #include "pa_vbool.h" | |
| #include "pa_vtable.h" | |
| #include "pa_vfile.h" | |
| #include "pa_vimage.h" | |
| #include <stdio.h> | //#define DEBUG_EXECUTE |
| const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500; | |
| #ifdef DEBUG_EXECUTE | |
| char *opcode_name[]={ | char *opcode_name[]={ |
| "STRING", | // literals |
| "CODE_ARRAY", | "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM", |
| "WITH_ROOT", "WITH_SELF", "WITH_READ", "WITH_WRITE", | |
| "CONSTRUCT", | // actions |
| "EXPRESSION_EVAL", "MODIFY_EVAL", | "WITH_SELF", "WITH_ROOT", "WITH_READ", "WITH_WRITE", |
| "WRITE", | "GET_CLASS", |
| "REPLACE_RESULT", | "CONSTRUCT_VALUE", "CONSTRUCT_DOUBLE", |
| "WRITE_VALUE", "WRITE_EXPR_RESULT", "STRING__WRITE", | |
| "GET_ELEMENT", "GET_ELEMENT__WRITE", | "GET_ELEMENT", "GET_ELEMENT__WRITE", |
| "CREATE_EWPOOL", "REDUCE_EWPOOL", | "CREATE_EWPOOL", "REDUCE_EWPOOL", |
| "CREATE_RWPOOL", "REDUCE_RWPOOL", | "CREATE_RWPOOL", "REDUCE_RWPOOL", |
| "CREATE_SWPOOL", "REDUCE_SWPOOL", | |
| "GET_METHOD_FRAME", | "GET_METHOD_FRAME", |
| "CREATE_JUNCTION", | |
| "STORE_PARAM", | "STORE_PARAM", |
| "CALL" | "CALL", |
| // expression ops: unary | |
| "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS", | |
| // expression ops: binary | |
| "SUB", "ADD", "MUL", "DIV", "MOD", | |
| "BIN_AND", "BIN_OR", "BIN_XOR", | |
| "LOG_AND", "LOG_OR", "LOG_XOR", | |
| "NUM_LT", "NUM_GT", "NUM_LE", "NUM_GE", "NUM_EQ", "NUM_NE", | |
| "STR_LT", "STR_GT", "STR_LE", "STR_GE", "STR_EQ", "STR_NE", | |
| "IS" | |
| }; | }; |
| void dump(int level, const Array *ops) { | void va_debug_printf(Pool& pool, const char *fmt,va_list args) { |
| if(!ops) | char buf[MAX_STRING]; |
| return; | vsnprintf(buf, MAX_STRING, fmt, args); |
| SAPI::log(pool, "%s", buf); | |
| } | |
| void debug_printf(Pool& pool, const char *fmt, ...) { | |
| va_list args; | |
| va_start(args,fmt); | |
| va_debug_printf(pool,fmt,args); | |
| va_end(args); | |
| } | |
| int size=ops->size(); | void debug_dump(Pool& pool, int level, const Array& ops) { |
| { | |
| int size=ops.quick_size(); | |
| //debug_printf(pool, "size=%d\n", size); | |
| for(int i=0; i<size; i++) { | |
| Operation op; | |
| op.cast=ops.quick_get(i); | |
| debug_printf(pool, "%8X\n", op.cast); | |
| } | |
| } | |
| int size=ops.quick_size(); | |
| //debug_printf(pool, "size=%d\n", size); | |
| for(int i=0; i<size; i++) { | for(int i=0; i<size; i++) { |
| int code=reinterpret_cast<int>(ops->raw_get(i)); | Operation op; |
| printf("%*s%s", level*4, "", opcode_name[code]); | op.cast=ops.quick_get(i); |
| if(code==OP_STRING) { | if(op.code==OP_VALUE || op.code==OP_STRING__WRITE) { |
| printf(" \"%s\"", static_cast<const String *>(ops->raw_get(++i))->cstr()); | Value *value=static_cast<Value *>(ops.quick_get(++i)); |
| debug_printf(pool, | |
| "%*s%s" | |
| " \"%s\" %s", | |
| level*4, "", opcode_name[op.code], | |
| value->get_string()->cstr(), value->type()); | |
| continue; | |
| } | } |
| printf("\n"); | debug_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]); |
| if(op.code==OP_CURLY_CODE__STORE_PARAM || op.code==OP_EXPR_CODE__STORE_PARAM) { | |
| const Array *local_ops=reinterpret_cast<const Array *>(ops.quick_get(++i)); | |
| debug_dump(pool, level+1, *local_ops); | |
| } | |
| } | |
| } | |
| #endif | |
| #define PUSH(value) stack.push(value) | |
| #define POP() static_cast<Value *>(stack.pop()) | |
| #define POP_NAME() static_cast<Value *>(stack.pop())->as_string() | |
| void Request::execute(const Array& ops) { | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), "source----------------------------\n"); | |
| debug_dump(pool(), 0, ops); | |
| debug_printf(pool(), "execution-------------------------\n"); | |
| #endif | |
| int size=ops.quick_size(); | |
| //debug_printf(pool(), "size=%d\n", size); | |
| for(int i=0; i<size; i++) { | |
| Operation op; | |
| op.cast=ops.quick_get(i); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), "%d:%s", stack.top_index()+1, opcode_name[op.code]); | |
| #endif | |
| switch(op.code) { | |
| // param in next instruction | |
| case OP_VALUE: | |
| { | |
| Value *value=static_cast<Value *>(ops.quick_get(++i)); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type()); | |
| #endif | |
| PUSH(value); | |
| 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 *>(ops.quick_get(++i)); | |
| #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 *value=NEW VJunction(j); | |
| // store param | |
| frame->store_param(frame->name(), value); | |
| break; | |
| } | |
| case OP_GET_CLASS: | |
| { | |
| // maybe they do ^class:method[] call, remember the fact | |
| wcontext->set_somebody_entered_some_class(); | |
| const String& name=POP_NAME(); | |
| Value *value=static_cast<Value *>(classes().get(name)); | |
| if(!value) | |
| THROW(0,0, | |
| &name, | |
| "class is undefined"); | |
| PUSH(value); | |
| break; | |
| } | |
| // OP_WITH | |
| case OP_WITH_SELF: | |
| { | |
| PUSH(self); | |
| break; | |
| } | |
| case OP_WITH_ROOT: | |
| { | |
| PUSH(root); | |
| break; | |
| } | |
| case OP_WITH_READ: | |
| { | |
| PUSH(rcontext); | |
| break; | |
| } | |
| case OP_WITH_WRITE: | |
| { | |
| PUSH(wcontext); | |
| break; | |
| } | |
| // OTHER ACTIONS BUT WITHs | |
| case OP_CONSTRUCT_VALUE: | |
| { | |
| Value *value=POP(); | |
| const String& name=POP_NAME(); | |
| Value *ncontext=POP(); | |
| ncontext->put_element(name, value); | |
| value->set_name(name); | |
| break; | |
| } | |
| case OP_CONSTRUCT_EXPR: | |
| { | |
| Value *value=POP(); | |
| const String& name=POP_NAME(); | |
| Value *ncontext=POP(); | |
| ncontext->put_element(name, value->as_expr_result()); | |
| value->set_name(name); | |
| break; | |
| } | |
| case OP_WRITE_VALUE: | |
| { | |
| Value *value=POP(); | |
| write_assign_lang(*value); | |
| // forget the fact they've entered some ^object.method[]. | |
| // see OP_GET_ELEMENT | |
| wcontext->clear_somebody_entered_some_object(); | |
| break; | |
| } | |
| case OP_WRITE_EXPR_RESULT: | |
| { | |
| Value *value=POP(); | |
| write_expr_result(*value->as_expr_result()); | |
| break; | |
| } | |
| case OP_STRING__WRITE: | |
| { | |
| VString *vstring=static_cast<VString *>(ops.quick_get(++i)); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), " \"%s\"", vstring->string().cstr()); | |
| #endif | |
| write_no_lang(vstring->string()); | |
| break; | |
| } | |
| case OP_GET_ELEMENT: | |
| { | |
| // maybe they do ^object.method[] call, remember the fact | |
| wcontext->inc_somebody_entered_some_object(); | |
| Value *value=get_element(); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_GET_ELEMENT__WRITE: | |
| { | |
| Value *value=get_element(); | |
| write_assign_lang(*value); | |
| break; | |
| } | |
| case OP_CREATE_EWPOOL: | |
| { | |
| PUSH(wcontext); | |
| PUSH((void *)flang); | |
| flang=String::UL_PASS_APPENDED; | |
| wcontext=NEW WWrapper(pool(), 0 /*empty*/, true /*constructing*/); | |
| break; | |
| } | |
| case OP_REDUCE_EWPOOL: | |
| { | |
| Value *value=wcontext->result(); | |
| flang=static_cast<String::Untaint_lang>(reinterpret_cast<int>(POP())); | |
| wcontext=static_cast<WContext *>(POP()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_CREATE_RWPOOL: | |
| { | |
| Value *ncontext=POP(); | |
| PUSH(rcontext); | |
| PUSH(wcontext); | |
| rcontext=ncontext; | |
| wcontext=NEW WWrapper(pool(), ncontext, false /*not constructing*/); | |
| break; | |
| } | |
| case OP_REDUCE_RWPOOL: | |
| { | |
| const String *string=wcontext->get_string(); | |
| Value *value; | |
| if(string) | |
| value=NEW VString(*string); | |
| else | |
| value=NEW VVoid(pool()); | |
| wcontext=static_cast<WContext *>(POP()); | |
| rcontext=POP(); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_CREATE_SWPOOL: | |
| { | |
| PUSH(wcontext); | |
| wcontext=NEW WWrapper(pool(), 0 /*empty*/, false /*not constructing*/); | |
| break; | |
| } | |
| case OP_REDUCE_SWPOOL: | |
| { | |
| // from "$a $b" part of expression taking only string value, | |
| // ignoring any other content of wcontext | |
| const String *string=wcontext->get_string(); | |
| Value *value; | |
| if(string) | |
| value=NEW VString(*string); | |
| else | |
| NEW VVoid(pool()); | |
| wcontext=static_cast<WContext *>(POP()); | |
| PUSH(value); | |
| break; | |
| } | |
| // CALL | |
| case OP_GET_METHOD_FRAME: | |
| { | |
| Value *value=POP(); | |
| if(code==OP_CODE_ARRAY) { | // info: |
| const Array *local_ops=reinterpret_cast<const Array *>(ops->raw_get(++i)); | // code compiled so that this one's always method-junction, |
| dump(level=1, local_ops); | // not a code-junction |
| Junction *junction=value->get_junction(); | |
| if(!junction) | |
| THROW(0,0, | |
| &value->name(), | |
| "(%s) not a method or junction, can not call it", | |
| value->type()); | |
| bool is_constructor= | |
| wcontext->constructing() && // constructing? | |
| wcontext->somebody_entered_some_class(); // ^class:method[..]? | |
| if(is_constructor) | |
| wcontext->constructing(false); | |
| VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction, is_constructor); | |
| PUSH(frame); | |
| break; | |
| } | |
| case OP_STORE_PARAM: | |
| { | |
| Value *value=POP(); | |
| VMethodFrame *frame=static_cast<VMethodFrame *>(stack.top_value()); | |
| frame->store_param(frame->name(), value); | |
| break; | |
| } | |
| case OP_CALL: | |
| { | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), "->\n"); | |
| #endif | |
| VMethodFrame *frame=static_cast<VMethodFrame *>(POP()); | |
| frame->fill_unspecified_params(); | |
| PUSH(self); | |
| PUSH(root); | |
| PUSH(rcontext); | |
| PUSH(wcontext); | |
| VStateless_class *called_class=frame->junction.self.get_class(); | |
| // not ^name.method call and | |
| // is context object or class & is it my class or my parent's class and? | |
| VStateless_class *read_class=rcontext->get_class(); | |
| if(!wcontext->somebody_entered_some_object() && | |
| read_class && read_class->is_or_derived_from(*called_class)) // yes | |
| self=rcontext; // class dynamic call | |
| else // no, not me or relative of mine (total stranger) | |
| // were are constructing something and | |
| // our constructor is just method call and | |
| // not static-only-method call | |
| if(frame->is_constructor && | |
| wcontext->somebody_entered_some_object()==1 && | |
| frame->junction.method->call_type!=Method::CT_STATIC) { | |
| // this is a constructor call | |
| // some stateless_object creatable derivates | |
| if(Value *value=called_class->create_new_value(pool())) | |
| self=value; | |
| else // stateful object | |
| self=NEW VObject(pool(), *called_class); | |
| frame->write(*self, | |
| String::UL_CLEAN // not used, always an object, not string | |
| ); | |
| } else | |
| self=&frame->junction.self; // no, static or simple dynamic call | |
| frame->set_self(*self); | |
| root=rcontext=wcontext=frame; | |
| { | |
| // take object or class from any wrappers | |
| // 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= | |
| called_class==self ? Method::CT_STATIC : Method::CT_DYNAMIC; | |
| if( | |
| method.call_type==Method::CT_ANY || | |
| method.call_type==call_type) // allowed call type? | |
| if(method.native_code) { // native code? | |
| method.check_actual_numbered_params(pool(), | |
| frame->junction.self, | |
| frame->name(), frame->numbered_params()); | |
| method.native_code( | |
| *this, | |
| frame->name(), frame->numbered_params()); // execute it | |
| } else { // parser code | |
| if(++anti_endless_execute_recoursion==ANTI_ENDLESS_EXECUTE_RECOURSION) { | |
| anti_endless_execute_recoursion=0; // give @exception a chance | |
| THROW(0, 0, | |
| &frame->name(), | |
| "endless recursion detected"); | |
| } | |
| execute(*method.parser_code); // execute it | |
| anti_endless_execute_recoursion--; | |
| } | |
| else | |
| THROW(0, 0, | |
| &frame->name(), | |
| "is not allowed to be called %s", | |
| call_type==Method::CT_STATIC?"statically":"dynamically"); | |
| } | |
| Value *value=wcontext->result(); | |
| wcontext=static_cast<WContext *>(POP()); | |
| rcontext=POP(); | |
| root=POP(); | |
| self=static_cast<VAliased *>(POP()); | |
| PUSH(value); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), "<-returned"); | |
| #endif | |
| break; | |
| } | |
| // expression ops: unary | |
| case OP_NEG: | |
| { | |
| Value *operand=POP(); | |
| Value *value=NEW VDouble(pool(), -operand->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_INV: | |
| { | |
| Value *operand=POP(); | |
| Value *value=NEW VDouble(pool(), ~operand->as_int()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NOT: | |
| { | |
| Value *operand=POP(); | |
| Value *value=NEW VBool(pool(), !operand->as_bool()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_DEF: | |
| { | |
| Value *operand=POP(); | |
| Value *value=NEW VBool(pool(), operand->is_defined()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_IN: | |
| { | |
| Value *operand=POP(); | |
| const char *path=operand->as_string().cstr(); | |
| Value *value=NEW VBool(pool(), | |
| info.uri && strncmp(path, info.uri, strlen(path))==0); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_FEXISTS: | |
| { | |
| Value *operand=POP(); | |
| Value *value=NEW VBool(pool(), | |
| file_readable(absolute(operand->as_string()))); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_DEXISTS: | |
| { | |
| Value *operand=POP(); | |
| Value *value=NEW VBool(pool(), | |
| dir_readable(absolute(operand->as_string()))); | |
| PUSH(value); | |
| break; | |
| } | |
| // expression ops: binary | |
| case OP_SUB: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VDouble(pool(), a->as_double() - b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_ADD: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VDouble(pool(), a->as_double() + b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_MUL: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VDouble(pool(), a->as_double() * b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_DIV: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| double a_double=a->as_double(); | |
| double b_double=b->as_double(); | |
| if(b_double == 0) { | |
| const String *problem_source=&b->as_string(); | |
| #ifndef NO_STRING_ORIGIN | |
| if(!problem_source->origin().file) | |
| problem_source=&b->name(); | |
| #endif | |
| THROW(0, 0, | |
| problem_source, | |
| "Division by zero"); | |
| } | |
| Value *value=NEW VDouble(pool(), a_double / b_double); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_MOD: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| int a_int=a->as_int(); | |
| int b_int=b->as_int(); | |
| if(b_int == 0) { | |
| const String *problem_source=&b->as_string(); | |
| #ifndef NO_STRING_ORIGIN | |
| if(!problem_source->origin().file) | |
| problem_source=&b->name(); | |
| #endif | |
| THROW(0, 0, | |
| problem_source, | |
| "Modulus by zero"); | |
| } | |
| Value *value=NEW VDouble(pool(), a_int % b_int); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_BIN_AND: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VDouble(pool(), | |
| a->as_int() & | |
| b->as_int()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_BIN_OR: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VDouble(pool(), | |
| a->as_int() | | |
| b->as_int()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_BIN_XOR: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VDouble(pool(), | |
| a->as_int() ^ | |
| b->as_int()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_LOG_AND: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_bool() && b->as_bool()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_LOG_OR: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_bool() || b->as_bool()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_LOG_XOR: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_bool() ^ b->as_bool()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NUM_LT: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_double() < b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NUM_GT: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_double() > b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NUM_LE: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_double() <= b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NUM_GE: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_double() >= b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NUM_EQ: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_double() == b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_NUM_NE: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_double() != b->as_double()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_STR_LT: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_string() < b->as_string()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_STR_GT: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_string() > b->as_string()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_STR_LE: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_string() <= b->as_string()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_STR_GE: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_string() >= b->as_string()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_STR_EQ: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_string() == b->as_string()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_STR_NE: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), a->as_string() != b->as_string()); | |
| PUSH(value); | |
| break; | |
| } | |
| case OP_IS: | |
| { | |
| Value *b=POP(); Value *a=POP(); | |
| Value *value=NEW VBool(pool(), b->as_string() == a->type()); | |
| PUSH(value); | |
| break; | |
| } | |
| default: | |
| THROW(0,0, | |
| 0, | |
| "invalid opcode %d", op.code); | |
| } | } |
| } | } |
| } | } |
| void execute(Pool *pool, const Array *ops) { | Value *Request::get_element() { |
| if(!ops) | const String& name=POP_NAME(); |
| return; | Value *ncontext=POP(); |
| Value *value; | |
| puts("---------------------------"); | if(Method* method=OP.get_method(name)) { // operator? |
| dump(0, ops); | // as if that method were in self and we have normal dynamic method here |
| puts("---------------------------"); | Junction& junction=*NEW Junction(pool(), |
| *self, self->get_class(), method, 0,0,0,0); | |
| value=NEW VJunction(junction); | |
| } else | |
| value=ncontext->get_element(name); | |
| if(value) | |
| value=&process(*value, &name); // process possible code-junction | |
| else { | |
| value=NEW VVoid(pool()); | |
| value->set_name(name); | |
| } | |
| return value; | |
| } | |
| /** @param intercept_string | |
| - true: | |
| they want result=string value, | |
| possible object result goes to wcontext | |
| - false: | |
| they want any result[string|object] | |
| nothing goes to wcontext. | |
| used in @c (expression) params evaluation | |
| */ | |
| Value& Request::process(Value& value, const String *name, bool intercept_string) { | |
| Value *result; | |
| Junction *junction=value.get_junction(); | |
| if(junction && junction->code) { // is it a code-junction? | |
| // process it | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), "ja->\n"); | |
| #endif | |
| PUSH(self); | |
| PUSH(root); | |
| PUSH(rcontext); | |
| PUSH(wcontext); | |
| WContext *frame; | |
| // for expression method params | |
| // wcontext is set 0 | |
| // using the fact in decision "which wwrapper to use" | |
| bool using_code_frame=intercept_string && junction->wcontext; | |
| if(using_code_frame) { | |
| // almost plain wwrapper about junction wcontext, | |
| // BUT intercepts string writes | |
| frame=NEW VCodeFrame(pool(), *junction->wcontext); | |
| } else { | |
| // plain wwrapper | |
| frame=NEW WWrapper(pool(), 0/*empty*/, false/*not constructing*/); | |
| } | |
| wcontext=frame; | |
| self=&junction->self; | |
| root=junction->root; | |
| rcontext=junction->rcontext; | |
| execute(*junction->code); | |
| if(using_code_frame) { | |
| // CodeFrame soul: | |
| // string writes were intercepted | |
| // returning them as the result of getting code-junction | |
| result=NEW VString(*frame->get_string()); | |
| } else | |
| result=frame->result(); | |
| wcontext=static_cast<WContext *>(POP()); | |
| rcontext=POP(); | |
| root=POP(); | |
| self=static_cast<VAliased *>(POP()); | |
| #ifdef DEBUG_EXECUTE | |
| debug_printf(pool(), "<-ja returned"); | |
| #endif | |
| } else | |
| result=&value; | |
| if(name) | |
| result->set_name(*name); | |
| return *result; | |
| } | |
| const String *Request::execute_method(Value& aself, const Method& method, bool return_cstr) { | |
| PUSH(self); | |
| PUSH(root); | |
| PUSH(rcontext); | |
| PUSH(wcontext); | |
| // initialize contexts | |
| root=rcontext=self=&aself; | |
| wcontext=NEW WWrapper(pool(), &aself, false /*not constructing*/); | |
| // execute! | |
| execute(*method.parser_code); | |
| // result | |
| const String *result; | |
| if(return_cstr) | |
| result=&wcontext->as_string(); | |
| else | |
| result=0; // ignore result | |
| wcontext=static_cast<WContext *>(POP()); | |
| rcontext=POP(); | |
| root=POP(); | |
| self=static_cast<VAliased *>(POP()); | |
| // return | |
| return result; | |
| } | |
| const String *Request::execute_method(Value& aself, | |
| const String& method_name, bool return_cstr) { | |
| if(Value *value=aself.get_element(method_name)) | |
| if(Junction *junction=value->get_junction()) | |
| if(const Method *method=junction->method) | |
| return execute_method(aself, *method, return_cstr); | |
| return 0; | |
| } | } |