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| version 1.22, 2001/03/09 08:19:50 | version 1.68, 2010/07/05 01:38:14 |
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| /* | /** @file |
| $Id$ | Parser: compiler support helper functions. |
| Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com) | |
| 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" | |
| void PV(Array/*<op>*/ *result, Value *value) { | Value* LA2V(ArrayOperation& literal_string_array, int offset, OP::OPCODE code) { |
| // append OP_VALUE | return literal_string_array[offset+0].code==code?literal_string_array[offset+2/*skip opcode&origin*/].value |
| Operation op; op.code=OP_VALUE; | :0; |
| *result+=op.cast; | } |
| // append 'value' | void maybe_change_string_literal_to_double_literal(ArrayOperation& literal_array) { |
| *result+=value; | 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())) | |
| void PCA(Array/*<op>*/ *result, Array/*<op>*/ *code_array) { | literal_array.put(2/*opcode+origin*/, &vstring.as_expr_result()); |
| // append OP_CODE | } |
| Operation op; op.code=OP_CODE__STORE_PARAM; | |
| *result+=op.cast; | void change_string_literal_value(ArrayOperation& literal_string_array, const String& new_value) { |
| assert(literal_string_array[0].code==OP::OP_VALUE); | |
| // append 'vstring' | static_cast<VString*>(literal_string_array[2/*opcode+origin*/].value)->set_string(new_value); |
| *result+=code_array; | } |
| } | |
| void changetail_or_append(ArrayOperation& opcodes, | |
| OP::OPCODE find, bool with_argument, OP::OPCODE replace, OP::OPCODE notfound) { | |
| Array *VL(Value *value) { | int tail=opcodes.count()-(with_argument?2:1); |
| // empty ops array | if(tail>=0) { |
| Array *result=N(value->pool()); | Operation& op=opcodes.get_ref(tail); |
| if(op.code==find) { | |
| // append 'value' to 'result' | op.code=replace; |
| PV(result, value); | return; |
| } | |
| return result; | } |
| } | |
| opcodes+=Operation(notfound); | |
| String *SLA2S(Array *literal_string_array, int offset) { | } |
| Operation op; | |
| op.cast=literal_string_array->get(offset+0); | bool maybe_change_first_opcode(ArrayOperation& opcodes, OP::OPCODE find, OP::OPCODE replace) { |
| if(op.code!=OP_VALUE) | if(opcodes[0].code!=find) |
| return 0; | return false; |
| return static_cast<VString *>(literal_string_array->get(offset+1))->get_string(); | opcodes.put(0, replace); |
| } | return true; |
| } | |
| void change_string_literal_to_double_literal(Array *literal_string_array) { | |
| VString *vstring=static_cast<VString *>(literal_string_array->get(1)); | |
| Value *value=vstring->get_expr_result(); | // OP_VALUE+origin+self+OP_GET_ELEMENT+OP_VALUE+origin+value+OP_GET_ELEMENT => OP_WITH_SELF__VALUE__GET_ELEMENT+origin+value |
| literal_string_array->put(1, value); | 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){ | |
| void push_LS(struct parse_control *pc, lexical_state new_state) { | #ifdef OPTIMIZE_BYTECODE_GET_SELF_ELEMENT |
| if(pc->sp<MAX_LEXICAL_STATES) { | if( |
| pc->stack[pc->sp++]=pc->ls; pc->ls=new_state; | 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; | |
| } | |
| 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(Parse_control& pc, lexical_state new_state) { | |
| if(pc.ls_sp<MAX_LEXICAL_STATES) { | |
| pc.ls_stack[pc.ls_sp++]=pc.ls; | |
| pc.ls=new_state; | |
| } else | } else |
| pc->pool->THROW(0, 0, 0, "push_LS: stack overflow"); | throw Exception(0, 0, |
| "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 |
| pc->pool->THROW(0, 0, 0, "push_LS: stack underflow"); | throw Exception(0, 0, |
| "pop_LS: ls_stack underflow"); | |
| } | |
| const String& Parse_control::alias_method(const String& name) { | |
| return (main_alias && name==main_method_name)?*main_alias:name; | |
| } | } |