--- parser3/src/main/execute.C 2001/04/05 19:35:16 1.138 +++ parser3/src/main/execute.C 2001/05/28 06:10:06 1.166 @@ -5,31 +5,29 @@ Author: Alexander Petrosyan (http://design.ru/paf) - $Id: execute.C,v 1.138 2001/04/05 19:35:16 paf Exp $ + $Id: execute.C,v 1.166 2001/05/28 06:10:06 parser Exp $ */ -#include "pa_config_includes.h" -#include "code.h" +#include "pa_opcode.h" #include "pa_array.h" #include "pa_request.h" #include "pa_vstring.h" #include "pa_vhash.h" -#include "pa_vunknown.h" -#include "pa_vcframe.h" -#include "pa_vmframe.h" +#include "pa_vnothing.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 - -#define PUSH(value) stack.push(value) -#define POP() static_cast(stack.pop()) -#define POP_NAME() static_cast(stack.pop())->as_string() +//#define DEBUG_EXECUTE +const uint ANTI_ENDLESS_EXECUTE_RECOURSION=500; +#ifdef DEBUG_EXECUTE char *opcode_name[]={ // literals "VALUE", "CURLY_CODE__STORE_PARAM", "EXPR_CODE__STORE_PARAM", @@ -48,7 +46,7 @@ char *opcode_name[]={ "CALL", // expression ops: unary - "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", + "NEG", "INV", "NOT", "DEF", "IN", "FEXISTS", "DEXISTS", // expression ops: binary "SUB", "ADD", "MUL", "DIV", "MOD", "BIN_AND", "BIN_OR", "BIN_XOR", @@ -58,75 +56,83 @@ char *opcode_name[]={ "IS" }; -void va_log_printf(Pool& pool, const char *fmt,va_list args) { - return; +void va_debug_printf(Pool& pool, const char *fmt,va_list args) { char buf[MAX_STRING]; vsnprintf(buf, MAX_STRING, fmt, args); SAPI::log(pool, "%s", buf); } -void log_printf(Pool& pool, const char *fmt, ...) { +void debug_printf(Pool& pool, const char *fmt, ...) { va_list args; va_start(args,fmt); - va_log_printf(pool,fmt,args); + va_debug_printf(pool,fmt,args); va_end(args); } -void dump(Pool& pool, int level, const Array& ops) { - if(0){ +void debug_dump(Pool& pool, int level, const Array& ops) { + { int size=ops.quick_size(); - //log_printf(pool, "size=%d\n", size); + //debug_printf(pool, "size=%d\n", size); for(int i=0; i(ops.quick_get(++i)); - log_printf(pool, + debug_printf(pool, "%*s%s" " \"%s\" %s", level*4, "", opcode_name[op.code], value->get_string()->cstr(), value->type()); continue; } - log_printf(pool, "%*s%s", level*4, "", opcode_name[op.code]); + 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(ops.quick_get(++i)); - dump(pool, level+1, *local_ops); + debug_dump(pool, level+1, *local_ops); } } } +#endif + +#define PUSH(value) stack.push(value) +#define POP() static_cast(stack.pop()) +#define POP_NAME() static_cast(stack.pop())->as_string() void Request::execute(const Array& ops) { - if(1) { - log_printf(pool(), "source----------------------------\n"); - dump(pool(), 0, ops); - log_printf(pool(), "execution-------------------------\n"); - } +#ifdef DEBUG_EXECUTE + debug_printf(pool(), "source----------------------------\n"); + debug_dump(pool(), 0, ops); + debug_printf(pool(), "execution-------------------------\n"); +#endif int size=ops.quick_size(); - //log_printf(pool(), "size=%d\n", size); + //debug_printf(pool(), "size=%d\n", size); for(int i=0; i(ops.quick_get(++i)); - log_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type()); +#ifdef DEBUG_EXECUTE + debug_printf(pool(), " \"%s\" %s", value->get_string()->cstr(), value->type()); +#endif PUSH(value); break; } @@ -136,29 +142,22 @@ void Request::execute(const Array& ops) VMethodFrame *frame=static_cast(stack.top_value()); // code const Array *local_ops=reinterpret_cast(ops.quick_get(++i)); - log_printf(pool(), " (%d)\n", local_ops->size()); - dump(pool(), 1, *local_ops); - - // when called method of some object, specifying object literally, - // e.g ^t.menu, code of curly params must be executed - // in r/w context of that object. - // otherwise in current r/w context. - // +#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, zeroing junction.wcontext being created - // later, in .process we would test that field + // 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, - wcontext->somebody_entered_some_object()>1? - &frame->junction.self /*^t.menu{}*/:rcontext/*^if()*/, - op.code==OP_EXPR_CODE__STORE_PARAM? - 0:wcontext->somebody_entered_some_object()>1? - frame/*^t.menu{}*/:wcontext/*^if()*/, + rcontext, + op.code==OP_EXPR_CODE__STORE_PARAM?0:wcontext, local_ops); Value *value=NEW VJunction(j); @@ -177,7 +176,7 @@ void Request::execute(const Array& ops) if(!value) THROW(0,0, &name, - ": undefined class"); + "class is undefined"); PUSH(value); break; @@ -228,6 +227,10 @@ void Request::execute(const Array& ops) { 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: @@ -239,7 +242,9 @@ void Request::execute(const Array& ops) case OP_STRING__WRITE: { VString *vstring=static_cast(ops.quick_get(++i)); - log_printf(pool(), " \"%s\"", vstring->string().cstr()); +#ifdef DEBUG_EXECUTE + debug_printf(pool(), " \"%s\"", vstring->string().cstr()); +#endif write_no_lang(vstring->string()); break; } @@ -283,8 +288,8 @@ void Request::execute(const Array& ops) { Value *ncontext=POP(); PUSH(rcontext); - rcontext=ncontext; PUSH(wcontext); + rcontext=ncontext; wcontext=NEW WWrapper(pool(), ncontext, false /*not constructing*/); break; } @@ -295,7 +300,7 @@ void Request::execute(const Array& ops) if(string) value=NEW VString(*string); else - value=NEW VUnknown(pool()); + value=NEW VNothing(pool()); wcontext=static_cast(POP()); rcontext=POP(); PUSH(value); @@ -316,7 +321,7 @@ void Request::execute(const Array& ops) if(string) value=NEW VString(*string); else - NEW VUnknown(pool()); + NEW VNothing(pool()); wcontext=static_cast(POP()); PUSH(value); break; @@ -343,8 +348,7 @@ void Request::execute(const Array& ops) if(is_constructor) wcontext->constructing(false); - VMethodFrame *frame=NEW VMethodFrame(pool(), *junction, is_constructor); - frame->set_name(value->name()); + VMethodFrame *frame=NEW VMethodFrame(pool(), value->name(), *junction, is_constructor); PUSH(frame); break; } @@ -358,7 +362,9 @@ void Request::execute(const Array& ops) case OP_CALL: { - log_printf(pool(), "->\n"); +#ifdef DEBUG_EXECUTE + debug_printf(pool(), "->\n"); +#endif VMethodFrame *frame=static_cast(POP()); frame->fill_unspecified_params(); PUSH(self); @@ -367,18 +373,23 @@ void Request::execute(const Array& ops) PUSH(wcontext); VStateless_class *called_class=frame->junction.self.get_class(); - // is context object or class & is it my class or my parent's 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(read_class && read_class->is_or_derived_from(*called_class)) // yes + 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) - if(frame->is_constructor) { + // 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 derivates with constructors - if(called_class==table_class) - self=NEW VTable(pool()); - else if(called_class==file_class) - self=NEW VFile(pool()); + // 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, @@ -401,14 +412,23 @@ void Request::execute(const Array& ops) 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( + method.check_actual_numbered_params(pool(), frame->junction.self, frame->name(), frame->numbered_params()); - (*method.native_code)( + method.native_code( *this, frame->name(), frame->numbered_params()); // execute it - } else // parser code + } 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(), @@ -424,7 +444,9 @@ void Request::execute(const Array& ops) self=static_cast(POP()); PUSH(value); - log_printf(pool(), "<-returned"); +#ifdef DEBUG_EXECUTE + debug_printf(pool(), "<-returned"); +#endif break; } @@ -439,7 +461,7 @@ void Request::execute(const Array& ops) case OP_INV: { Value *operand=POP(); - Value *value=NEW VDouble(pool(), ~(int)operand->as_double()); + Value *value=NEW VDouble(pool(), ~operand->as_int()); PUSH(value); break; } @@ -461,7 +483,8 @@ void Request::execute(const Array& ops) { Value *operand=POP(); const char *path=operand->as_string().cstr(); - Value *value=NEW VBool(pool(), info.uri && strcmp(path, info.uri)<=0); + Value *value=NEW VBool(pool(), + info.uri && strncmp(path, info.uri, strlen(path))==0); PUSH(value); break; } @@ -473,6 +496,14 @@ void Request::execute(const Array& ops) 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: @@ -507,8 +538,8 @@ void Request::execute(const Array& ops) { Value *b=POP(); Value *a=POP(); Value *value=NEW VDouble(pool(), - (int)a->as_double() % - (int)b->as_double()); + a->as_int() % + b->as_int()); PUSH(value); break; } @@ -516,8 +547,8 @@ void Request::execute(const Array& ops) { Value *b=POP(); Value *a=POP(); Value *value=NEW VDouble(pool(), - (int)a->as_double() & - (int)b->as_double()); + a->as_int() & + b->as_int()); PUSH(value); break; } @@ -525,8 +556,8 @@ void Request::execute(const Array& ops) { Value *b=POP(); Value *a=POP(); Value *value=NEW VDouble(pool(), - (int)a->as_double() | - (int)b->as_double()); + a->as_int() | + b->as_int()); PUSH(value); break; } @@ -534,8 +565,8 @@ void Request::execute(const Array& ops) { Value *b=POP(); Value *a=POP(); Value *value=NEW VDouble(pool(), - (int)a->as_double() ^ - (int)b->as_double()); + a->as_int() ^ + b->as_int()); PUSH(value); break; } @@ -655,7 +686,7 @@ void Request::execute(const Array& ops) default: THROW(0,0, 0, - "unhandled '%s' opcode", opcode_name[op.code]); + "invalid opcode %d", op.code); } } } @@ -663,20 +694,25 @@ void Request::execute(const Array& ops) Value *Request::get_element() { const String& name=POP_NAME(); Value *ncontext=POP(); - Value *value=ncontext->get_element(name); - + Value *value; + if(Method* method=OP.get_method(name)) { // operator? + // as if that method were in self and we have normal dynamic method here + 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 VUnknown(pool()); + value=NEW VNothing(pool()); value->set_name(name); } return value; } -/** - intercept_string: +/** @param intercept_string - true: they want result=string value, possible object result goes to wcontext @@ -690,7 +726,9 @@ Value& Request::process(Value& value, co Junction *junction=value.get_junction(); if(junction && junction->code) { // is it a code-junction? // process it - log_printf(pool(), "ja->\n"); +#ifdef DEBUG_EXECUTE + debug_printf(pool(), "ja->\n"); +#endif PUSH(self); PUSH(root); PUSH(rcontext); @@ -728,7 +766,9 @@ Value& Request::process(Value& value, co root=POP(); self=static_cast(POP()); - log_printf(pool(), "<-ja returned"); +#ifdef DEBUG_EXECUTE + debug_printf(pool(), "<-ja returned"); +#endif } else result=&value;