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| version 1.57.14.1, 2005/08/05 13:01:16 | version 1.80, 2019/11/25 22:01:51 |
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| /** @file | /** @file |
| Parser: compiler support helper functions. | Parser: compiler support helper functions. |
| Copyright (c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2017 Art. Lebedev Studio (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ | */ |
| static const char * const IDENT_COMPILE_TOOLS_C="$Date$"; | |
| #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_vstring.h" |
| #include "pa_vdouble.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) { | Value* LA2V(ArrayOperation& literal_string_array, int offset, OP::OPCODE code) { |
| return literal_string_array[offset+0].code==OP_VALUE?literal_string_array[offset+2/*skip opcode&origin*/].value | return literal_string_array[offset+0].code==code?literal_string_array[offset+2/*skip opcode&origin*/].value |
| :0; | :0; |
| } | } |
| void maybe_change_string_literal_to_double_literal(ArrayOperation& literal_array) { | void maybe_change_string_literal_to_double_literal(ArrayOperation& literal_array) { |
| assert(literal_array[0].code==OP_VALUE); | assert(literal_array[0].code==OP::OP_VALUE); |
| VString& vstring=*static_cast<VString*>(literal_array[2/*opcode+origin*/].value); | VString& vstring=*static_cast<VString*>(literal_array[2/*opcode+origin*/].value); |
| if(isdigit(vstring.string().first_char())) | if(isdigit(vstring.string().first_char())) |
| literal_array.put(2/*opcode+origin*/, &vstring.as_expr_result()); | literal_array.put(2/*opcode+origin*/, &vstring.as_expr_result()); |
| } | } |
| void change_string_literal_value(ArrayOperation& literal_string_array, const String& new_value) { | void change_string_literal_value(ArrayOperation& literal_string_array, const String& new_value) { |
| assert(literal_string_array[0].code==OP_VALUE); | assert(literal_string_array[0].code==OP::OP_VALUE); |
| static_cast<VString*>(literal_string_array[2/*opcode+origin*/].value)->set_string(new_value); | static_cast<VString*>(literal_string_array[2/*opcode+origin*/].value)->set_string(new_value); |
| } | } |
| void changetail_or_append(ArrayOperation& opcodes, | bool change_first(ArrayOperation& opcodes, OP::OPCODE find, OP::OPCODE replace) { |
| OPCODE find, bool with_argument, OPCODE replace, OPCODE notfound) { | Operation& op=opcodes.get_ref(0); |
| int tail=opcodes.count()-(with_argument?2:1); | if(op.code!=find) |
| if(tail>=0) { | return false; |
| Operation& op=opcodes.get_ref(tail); | |
| if(op.code==find) { | op.code=replace; |
| op.code=replace; | return true; |
| return; | } |
| // OP_VALUE+origin+self+OP_GET_ELEMENT+OP_VALUE+origin+value+OP_GET_ELEMENT => OP_WITH_SELF__VALUE__GET_ELEMENT+origin+value | |
| bool maybe_make_self(ArrayOperation& opcodes, ArrayOperation& diving_code, size_t diving_count){ | |
| const String* first_name=LA2S(diving_code); | |
| if(first_name && SYMBOLS_EQ(*first_name,SELF_SYMBOL)){ | |
| #ifdef OPTIMIZE_BYTECODE_GET_SELF_ELEMENT | |
| if( | |
| diving_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(diving_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, diving_count >=4 ? 4 /*OP::OP_VALUE+origin+string+OP::OP_GET_ELEMENTx*/ : 3 /*OP::OP_+origin+string*/); | |
| } | } |
| return true; | |
| } | } |
| return false; | |
| } | |
| opcodes+=Operation(notfound); | #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; | |
| } | |
| } | } |
| bool is_special_element(ArrayOperation& opcodes){ | |
| const String* name=LA2S(opcodes); | |
| return name && ( SYMBOLS_EQ(*name,CLASS_SYMBOL) || SYMBOLS_EQ(*name,CLASS_NAME_SYMBOL) ); | |
| } | |
| #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!=Symbols::STATIC_SYMBOL) | |
| throw Exception("parser.compile", &call_type, "incorrect method call type. the only valid call type method prefix is '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(Parse_control& pc, lexical_state new_state) { | void push_LS(Parse_control& pc, lexical_state new_state) { |
| if(pc.ls_sp<MAX_LEXICAL_STATES) { | if(pc.ls_sp<MAX_LEXICAL_STATES) { |
| pc.ls_stack[pc.ls_sp++]=pc.ls; | pc.ls_stack[pc.ls_sp++]=pc.ls; |
| pc.ls=new_state; | pc.ls=new_state; |
| } else | } else |
| throw Exception(0, 0, | throw Exception(0, 0, "push_LS: ls_stack overflow"); |
| "push_LS: ls_stack overflow"); | |
| } | } |
| void pop_LS(Parse_control& pc) { | void pop_LS(Parse_control& pc) { |
| if(--pc.ls_sp>=0) | if(--pc.ls_sp>=0) |
| pc.ls=pc.ls_stack[pc.ls_sp]; | pc.ls=pc.ls_stack[pc.ls_sp]; |
| else | else |
| throw Exception(0, 0, | throw Exception(0, 0, "pop_LS: ls_stack underflow"); |
| "pop_LS: ls_stack underflow"); | |
| } | } |
| const String& Parse_control::alias_method(const String& name) { | const String& Parse_control::alias_method(const String& name) { |