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| version 1.4, 2001/02/21 11:13:16 | version 1.70, 2015/03/16 09:47:34 |
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| /* | /** @file |
| $Id$ | Parser: compiler support helper functions. |
| Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com) | |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| */ | */ |
| #include "compile_tools.h" | #include "compile_tools.h" |
| #include "pa_string.h" | #include "pa_string.h" |
| #include "pa_array.h" | #include "pa_array.h" |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_vstring.h" | |
| #include "pa_vdouble.h" | |
| #include "pa_vmethod_frame.h" | |
| volatile const char * IDENT_COMPILE_TOOLS_C="$Id$" IDENT_COMPILE_TOOLS_H; | |
| Value* LA2V(ArrayOperation& literal_string_array, int offset, OP::OPCODE code) { | |
| return literal_string_array[offset+0].code==code?literal_string_array[offset+2/*skip opcode&origin*/].value | |
| :0; | |
| } | |
| void maybe_change_string_literal_to_double_literal(ArrayOperation& literal_array) { | |
| assert(literal_array[0].code==OP::OP_VALUE); | |
| VString& vstring=*static_cast<VString*>(literal_array[2/*opcode+origin*/].value); | |
| if(isdigit(vstring.string().first_char())) | |
| literal_array.put(2/*opcode+origin*/, &vstring.as_expr_result()); | |
| } | |
| void change_string_literal_value(ArrayOperation& literal_string_array, const String& new_value) { | |
| assert(literal_string_array[0].code==OP::OP_VALUE); | |
| static_cast<VString*>(literal_string_array[2/*opcode+origin*/].value)->set_string(new_value); | |
| } | |
| Array *L(String *string) { | bool change_first(ArrayOperation& opcodes, OP::OPCODE find, OP::OPCODE replace) { |
| // empty ops array | Operation& op=opcodes.get_ref(0); |
| Array *result=N(string->pool()); | if(op.code!=find) |
| return false; | |
| op.code=replace; | |
| return true; | |
| } | |
| // append OP_STRING | |
| Operation op; op.code=OP_STRING; | |
| *result+=reinterpret_cast<Array::Item *>(op.cast); | |
| // append 'string' | // OP_VALUE+origin+self+OP_GET_ELEMENT+OP_VALUE+origin+value+OP_GET_ELEMENT => OP_WITH_SELF__VALUE__GET_ELEMENT+origin+value |
| *result+=string; | bool maybe_make_self(ArrayOperation& opcodes, ArrayOperation& diving_code, size_t divine_count){ |
| const String* first_name=LA2S(diving_code); | |
| if(first_name && *first_name==SELF_ELEMENT_NAME){ | |
| #ifdef OPTIMIZE_BYTECODE_GET_SELF_ELEMENT | |
| if( | |
| divine_count>=8 | |
| && diving_code[3].code==OP::OP_GET_ELEMENT | |
| && diving_code[4].code==OP::OP_VALUE | |
| && diving_code[7].code==OP::OP_GET_ELEMENT | |
| ){ | |
| // optimization for $self.field and ^self.method | |
| O(opcodes, OP::OP_WITH_SELF__VALUE__GET_ELEMENT); | |
| P(opcodes, diving_code, 5/*offset*/, 2/*limit*/); // copy second origin+value. we know that the first one is "self" | |
| if(divine_count>8) | |
| P(opcodes, diving_code, 8/*offset*/); // copy tail | |
| } else | |
| #endif | |
| { | |
| // self.xxx... => xxx... | |
| // OP_VALUE+origin+string+OP_GET_ELEMENT+... -> OP_WITH_SELF+... | |
| O(opcodes, OP::OP_WITH_SELF); /* stack: starting context */ | |
| P(opcodes, diving_code, divine_count>=4?4/*OP::OP_VALUE+origin+string+OP::OP_GET_ELEMENTx*/:3/*OP::OP_+origin+string*/); | |
| } | |
| return true; | |
| } | |
| return false; | |
| } | |
| return result; | #ifdef OPTIMIZE_BYTECODE_GET_ELEMENT__SPECIAL |
| bool maybe_append_simple_diving_code(ArrayOperation& code, ArrayOperation& diving_code){ | |
| if( | |
| diving_code.count()==3 | |
| && diving_code[0].code==OP::OP_STRING__WRITE | |
| ){ | |
| O(code, OP::OP_VALUE); | |
| P(code, diving_code, 1/*offset*/, 2/*limit*/); /*copy origin+value*/ | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| } | } |
| const String *LA2S(Array *literal_string_array) { | bool is_special_element(ArrayOperation& opcodes){ |
| return static_cast<const String *>(literal_string_array->get(1)); | const String* name=LA2S(opcodes); |
| return ( | |
| name | |
| && ( | |
| *name==class_element_name | |
| || *name==class_name_element_name | |
| ) | |
| ); | |
| } | } |
| #endif | |
| Method::Call_type GetMethodCallType(Parse_control& pc, ArrayOperation& literal_array) { | |
| const String* full_name=LA2S(literal_array); | |
| int pos=full_name->pos(':'); | |
| if(pos > 0) { | |
| const String call_type=full_name->mid(0, pos); | |
| if(call_type!=method_call_type_static) | |
| throw Exception("parser.compile", | |
| &call_type, | |
| "incorrect method call type. the only valid call type method prefix is '"METHOD_CALL_TYPE_STATIC"'" | |
| ); | |
| const String *sole_name=&full_name->mid(pos+1, full_name->length()); | |
| // replace full method name (static:method) by sole method name (method). it will be used later. | |
| change_string_literal_value(literal_array, *sole_name); | |
| return Method::CT_STATIC; | |
| } | |
| return pc.get_methods_call_type(); | |
| } | |
| void push_LS(struct parse_control *pc) { | void push_LS(Parse_control& pc, lexical_state new_state) { |
| if(pc->sp<MAX_LEXICAL_STATES) { | if(pc.ls_sp<MAX_LEXICAL_STATES) { |
| pc->stack[pc->sp++]=pc->ls; pc->ls=LS_VAR_NAME_SIMPLE; | pc.ls_stack[pc.ls_sp++]=pc.ls; |
| pc.ls=new_state; | |
| } else | } else |
| (static_cast<Pool *>(pc->pool))->exception().raise(0, 0, 0, | throw Exception(0, 0, |
| "push_LS: stack overflow"); | "push_LS: ls_stack overflow"); |
| } | } |
| void pop_LS(struct parse_control *pc) { | void pop_LS(Parse_control& pc) { |
| if(--pc->sp>=0) | if(--pc.ls_sp>=0) |
| pc->ls=pc->stack[pc->sp]; | pc.ls=pc.ls_stack[pc.ls_sp]; |
| else | else |
| (static_cast<Pool *>(pc->pool))->exception().raise(0, 0, 0, | throw Exception(0, 0, |
| "push_LS: stack underflow"); | "pop_LS: ls_stack underflow"); |
| } | |
| const String& Parse_control::alias_method(const String& name) { | |
| return (main_alias && name==main_method_name)?*main_alias:name; | |
| } | } |