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godot/modules/gdscript/gd_compiler.cpp
Juan Linietsky cc0a7b24e7 missed ifdef that broke android build
2016-06-01 20:44:34 -03:00

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/*************************************************************************/
/* gd_compiler.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gd_compiler.h"
#include "gd_script.h"
void GDCompiler::_set_error(const String& p_error,const GDParser::Node *p_node) {
if (error!="")
return;
error=p_error;
if (p_node) {
err_line=p_node->line;
err_column=p_node->column;
} else {
err_line=0;
err_column=0;
}
}
bool GDCompiler::_create_unary_operator(CodeGen& codegen,const GDParser::OperatorNode *on,Variant::Operator op, int p_stack_level) {
ERR_FAIL_COND_V(on->arguments.size()!=1,false);
int src_address_a = _parse_expression(codegen,on->arguments[0],p_stack_level);
if (src_address_a<0)
return false;
codegen.opcodes.push_back(GDFunction::OPCODE_OPERATOR); // perform operator
codegen.opcodes.push_back(op); //which operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_a); // argument 2 (repeated)
//codegen.opcodes.push_back(GDFunction::ADDR_TYPE_NIL); // argument 2 (unary only takes one parameter)
return true;
}
bool GDCompiler::_create_binary_operator(CodeGen& codegen,const GDParser::OperatorNode *on,Variant::Operator op, int p_stack_level,bool p_initializer) {
ERR_FAIL_COND_V(on->arguments.size()!=2,false);
int src_address_a = _parse_expression(codegen,on->arguments[0],p_stack_level,false,p_initializer);
if (src_address_a<0)
return false;
if (src_address_a&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)
p_stack_level++; //uses stack for return, increase stack
int src_address_b = _parse_expression(codegen,on->arguments[1],p_stack_level,false,p_initializer);
if (src_address_b<0)
return false;
codegen.opcodes.push_back(GDFunction::OPCODE_OPERATOR); // perform operator
codegen.opcodes.push_back(op); //which operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
return true;
}
/*
int GDCompiler::_parse_subexpression(CodeGen& codegen,const GDParser::Node *p_expression) {
int ret = _parse_expression(codegen,p_expression);
if (ret<0)
return ret;
if (ret&(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)) {
codegen.stack_level++;
codegen.check_max_stack_level();
//stack was used, keep value
}
return ret;
}
*/
int GDCompiler::_parse_assign_right_expression(CodeGen& codegen,const GDParser::OperatorNode *p_expression, int p_stack_level) {
Variant::Operator var_op=Variant::OP_MAX;
switch(p_expression->op) {
case GDParser::OperatorNode::OP_ASSIGN_ADD: var_op=Variant::OP_ADD; break;
case GDParser::OperatorNode::OP_ASSIGN_SUB: var_op=Variant::OP_SUBSTRACT; break;
case GDParser::OperatorNode::OP_ASSIGN_MUL: var_op=Variant::OP_MULTIPLY; break;
case GDParser::OperatorNode::OP_ASSIGN_DIV: var_op=Variant::OP_DIVIDE; break;
case GDParser::OperatorNode::OP_ASSIGN_MOD: var_op=Variant::OP_MODULE; break;
case GDParser::OperatorNode::OP_ASSIGN_SHIFT_LEFT: var_op=Variant::OP_SHIFT_LEFT; break;
case GDParser::OperatorNode::OP_ASSIGN_SHIFT_RIGHT: var_op=Variant::OP_SHIFT_RIGHT; break;
case GDParser::OperatorNode::OP_ASSIGN_BIT_AND: var_op=Variant::OP_BIT_AND; break;
case GDParser::OperatorNode::OP_ASSIGN_BIT_OR: var_op=Variant::OP_BIT_OR; break;
case GDParser::OperatorNode::OP_ASSIGN_BIT_XOR: var_op=Variant::OP_BIT_XOR; break;
case GDParser::OperatorNode::OP_INIT_ASSIGN:
case GDParser::OperatorNode::OP_ASSIGN: {
//none
} break;
default: {
ERR_FAIL_V(-1);
}
}
bool initializer = p_expression->op==GDParser::OperatorNode::OP_INIT_ASSIGN;
if (var_op==Variant::OP_MAX) {
return _parse_expression(codegen,p_expression->arguments[1],p_stack_level,false,initializer);
}
if (!_create_binary_operator(codegen,p_expression,var_op,p_stack_level,initializer))
return -1;
int dst_addr=(p_stack_level)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
}
int GDCompiler::_parse_expression(CodeGen& codegen,const GDParser::Node *p_expression, int p_stack_level,bool p_root,bool p_initializer) {
switch(p_expression->type) {
//should parse variable declaration and adjust stack accordingly...
case GDParser::Node::TYPE_IDENTIFIER: {
//return identifier
//wait, identifier could be a local variable or something else... careful here, must reference properly
//as stack may be more interesting to work with
//This could be made much simpler by just indexing "self", but done this way (with custom self-addressing modes) increases peformance a lot.
const GDParser::IdentifierNode *in = static_cast<const GDParser::IdentifierNode*>(p_expression);
StringName identifier = in->name;
// TRY STACK!
if (!p_initializer && codegen.stack_identifiers.has(identifier)) {
int pos = codegen.stack_identifiers[identifier];
return pos|(GDFunction::ADDR_TYPE_STACK_VARIABLE<<GDFunction::ADDR_BITS);
}
//TRY MEMBERS!
if (!codegen.function_node || !codegen.function_node->_static) {
// TRY MEMBER VARIABLES!
//static function
if (codegen.script->member_indices.has(identifier)) {
int idx = codegen.script->member_indices[identifier].index;
return idx|(GDFunction::ADDR_TYPE_MEMBER<<GDFunction::ADDR_BITS); //argument (stack root)
}
}
//TRY CLASS CONSTANTS
GDScript *owner = codegen.script;
while (owner) {
GDScript *scr = owner;
GDNativeClass *nc=NULL;
while(scr) {
if (scr->constants.has(identifier)) {
//int idx=scr->constants[identifier];
int idx = codegen.get_name_map_pos(identifier);
return idx|(GDFunction::ADDR_TYPE_CLASS_CONSTANT<<GDFunction::ADDR_BITS); //argument (stack root)
}
if (scr->native.is_valid())
nc=scr->native.ptr();
scr=scr->_base;
}
// CLASS C++ Integer Constant
if (nc) {
bool success=false;
int constant = ObjectTypeDB::get_integer_constant(nc->get_name(),identifier,&success);
if (success) {
Variant key=constant;
int idx;
if (!codegen.constant_map.has(key)) {
idx=codegen.constant_map.size();
codegen.constant_map[key]=idx;
} else {
idx=codegen.constant_map[key];
}
return idx|(GDFunction::ADDR_TYPE_LOCAL_CONSTANT<<GDFunction::ADDR_BITS); //make it a local constant (faster access)
}
}
owner=owner->_owner;
}
/*
handled in constants now
if (codegen.script->subclasses.has(identifier)) {
//same with a subclass, make it a local constant.
int idx = codegen.get_constant_pos(codegen.script->subclasses[identifier]);
return idx|(GDFunction::ADDR_TYPE_LOCAL_CONSTANT<<GDFunction::ADDR_BITS); //make it a local constant (faster access)
}*/
if (GDScriptLanguage::get_singleton()->get_global_map().has(identifier)) {
int idx = GDScriptLanguage::get_singleton()->get_global_map()[identifier];
return idx|(GDFunction::ADDR_TYPE_GLOBAL<<GDFunction::ADDR_BITS); //argument (stack root)
}
//not found, error
_set_error("Identifier not found: "+String(identifier),p_expression);
return -1;
} break;
case GDParser::Node::TYPE_CONSTANT: {
//return constant
const GDParser::ConstantNode *cn = static_cast<const GDParser::ConstantNode*>(p_expression);
int idx;
if (!codegen.constant_map.has(cn->value)) {
idx=codegen.constant_map.size();
codegen.constant_map[cn->value]=idx;
} else {
idx=codegen.constant_map[cn->value];
}
return idx|(GDFunction::ADDR_TYPE_LOCAL_CONSTANT<<GDFunction::ADDR_BITS); //argument (stack root)
} break;
case GDParser::Node::TYPE_SELF: {
//return constant
if (codegen.function_node && codegen.function_node->_static) {
_set_error("'self' not present in static function!",p_expression);
return -1;
}
return (GDFunction::ADDR_TYPE_SELF<<GDFunction::ADDR_BITS);
} break;
case GDParser::Node::TYPE_ARRAY: {
const GDParser::ArrayNode *an = static_cast<const GDParser::ArrayNode*>(p_expression);
Vector<int> values;
int slevel=p_stack_level;
for(int i=0;i<an->elements.size();i++) {
int ret = _parse_expression(codegen,an->elements[i],slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
}
codegen.opcodes.push_back(GDFunction::OPCODE_CONSTRUCT_ARRAY);
codegen.opcodes.push_back(values.size());
for(int i=0;i<values.size();i++)
codegen.opcodes.push_back(values[i]);
int dst_addr=(p_stack_level)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDParser::Node::TYPE_DICTIONARY: {
const GDParser::DictionaryNode *dn = static_cast<const GDParser::DictionaryNode*>(p_expression);
Vector<int> values;
int slevel=p_stack_level;
for(int i=0;i<dn->elements.size();i++) {
int ret = _parse_expression(codegen,dn->elements[i].key,slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
ret = _parse_expression(codegen,dn->elements[i].value,slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
values.push_back(ret);
}
codegen.opcodes.push_back(GDFunction::OPCODE_CONSTRUCT_DICTIONARY);
codegen.opcodes.push_back(dn->elements.size());
for(int i=0;i<values.size();i++)
codegen.opcodes.push_back(values[i]);
int dst_addr=(p_stack_level)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
case GDParser::Node::TYPE_OPERATOR: {
//hell breaks loose
const GDParser::OperatorNode *on = static_cast<const GDParser::OperatorNode*>(p_expression);
switch(on->op) {
//call/constructor operator
case GDParser::OperatorNode::OP_PARENT_CALL: {
ERR_FAIL_COND_V(on->arguments.size()<1,-1);
const GDParser::IdentifierNode *in = (const GDParser::IdentifierNode *)on->arguments[0];
Vector<int> arguments;
int slevel = p_stack_level;
for(int i=1;i<on->arguments.size();i++) {
int ret = _parse_expression(codegen,on->arguments[i],slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(GDFunction::OPCODE_CALL_SELF_BASE); // basic type constructor
codegen.opcodes.push_back(codegen.get_name_map_pos(in->name)); //instance
codegen.opcodes.push_back(arguments.size()); //argument count
codegen.alloc_call(arguments.size());
for(int i=0;i<arguments.size();i++)
codegen.opcodes.push_back(arguments[i]); //arguments
} break;
case GDParser::OperatorNode::OP_CALL: {
if (on->arguments[0]->type==GDParser::Node::TYPE_TYPE) {
//construct a basic type
ERR_FAIL_COND_V(on->arguments.size()<1,-1);
const GDParser::TypeNode *tn = (const GDParser::TypeNode *)on->arguments[0];
int vtype = tn->vtype;
Vector<int> arguments;
int slevel = p_stack_level;
for(int i=1;i<on->arguments.size();i++) {
int ret = _parse_expression(codegen,on->arguments[i],slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(GDFunction::OPCODE_CONSTRUCT); // basic type constructor
codegen.opcodes.push_back(vtype); //instance
codegen.opcodes.push_back(arguments.size()); //argument count
codegen.alloc_call(arguments.size());
for(int i=0;i<arguments.size();i++)
codegen.opcodes.push_back(arguments[i]); //arguments
} else if (on->arguments[0]->type==GDParser::Node::TYPE_BUILT_IN_FUNCTION) {
//built in function
ERR_FAIL_COND_V(on->arguments.size()<1,-1);
Vector<int> arguments;
int slevel = p_stack_level;
for(int i=1;i<on->arguments.size();i++) {
int ret = _parse_expression(codegen,on->arguments[i],slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
codegen.opcodes.push_back(GDFunction::OPCODE_CALL_BUILT_IN);
codegen.opcodes.push_back(static_cast<const GDParser::BuiltInFunctionNode*>(on->arguments[0])->function);
codegen.opcodes.push_back(on->arguments.size()-1);
codegen.alloc_call(on->arguments.size()-1);
for(int i=0;i<arguments.size();i++)
codegen.opcodes.push_back(arguments[i]);
} else {
//regular function
ERR_FAIL_COND_V(on->arguments.size()<2,-1);
const GDParser::Node *instance = on->arguments[0];
bool in_static=false;
if (instance->type==GDParser::Node::TYPE_SELF) {
//room for optimization
}
Vector<int> arguments;
int slevel = p_stack_level;
for(int i=0;i<on->arguments.size();i++) {
int ret;
if (i==0 && on->arguments[i]->type==GDParser::Node::TYPE_SELF && codegen.function_node && codegen.function_node->_static) {
//static call to self
ret=(GDFunction::ADDR_TYPE_CLASS<<GDFunction::ADDR_BITS);
} else if (i==1) {
if (on->arguments[i]->type!=GDParser::Node::TYPE_IDENTIFIER) {
_set_error("Attempt to call a non-identifier.",on);
return -1;
}
GDParser::IdentifierNode *id = static_cast<GDParser::IdentifierNode*>(on->arguments[i]);
ret=codegen.get_name_map_pos(id->name);
} else {
ret = _parse_expression(codegen,on->arguments[i],slevel);
if (ret<0)
return ret;
if (ret&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
}
arguments.push_back(ret);
}
codegen.opcodes.push_back(p_root?GDFunction::OPCODE_CALL:GDFunction::OPCODE_CALL_RETURN); // perform operator
codegen.opcodes.push_back(on->arguments.size()-2);
codegen.alloc_call(on->arguments.size()-2);
for(int i=0;i<arguments.size();i++)
codegen.opcodes.push_back(arguments[i]);
}
} break;
case GDParser::OperatorNode::OP_YIELD: {
ERR_FAIL_COND_V(on->arguments.size() && on->arguments.size()!=2,-1);
Vector<int> arguments;
int slevel = p_stack_level;
for(int i=0;i<on->arguments.size();i++) {
int ret = _parse_expression(codegen,on->arguments[i],slevel);
if (ret<0)
return ret;
if (ret&(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)) {
slevel++;
codegen.alloc_stack(slevel);
}
arguments.push_back(ret);
}
//push call bytecode
codegen.opcodes.push_back(arguments.size()==0?GDFunction::OPCODE_YIELD:GDFunction::OPCODE_YIELD_SIGNAL); // basic type constructor
for(int i=0;i<arguments.size();i++)
codegen.opcodes.push_back(arguments[i]); //arguments
codegen.opcodes.push_back(GDFunction::OPCODE_YIELD_RESUME);
//next will be where to place the result :)
} break;
//indexing operator
case GDParser::OperatorNode::OP_INDEX:
case GDParser::OperatorNode::OP_INDEX_NAMED: {
ERR_FAIL_COND_V(on->arguments.size()!=2,-1);
int slevel = p_stack_level;
bool named=(on->op==GDParser::OperatorNode::OP_INDEX_NAMED);
int from = _parse_expression(codegen,on->arguments[0],slevel);
if (from<0)
return from;
int index;
if (named) {
#ifdef DEBUG_ENABLED
if (on->arguments[0]->type==GDParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
const Map<StringName,GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(static_cast<GDParser::IdentifierNode*>(on->arguments[1])->name);
if (MI && MI->get().getter==codegen.function_node->name) {
String n = static_cast<GDParser::IdentifierNode*>(on->arguments[1])->name;
_set_error("Must use '"+n+"' instead of 'self."+n+"' in getter.",on);
return -1;
}
}
#endif
index=codegen.get_name_map_pos(static_cast<GDParser::IdentifierNode*>(on->arguments[1])->name);
} else {
if (on->arguments[1]->type==GDParser::Node::TYPE_CONSTANT && static_cast<const GDParser::ConstantNode*>(on->arguments[1])->value.get_type()==Variant::STRING) {
//also, somehow, named (speed up anyway)
StringName name = static_cast<const GDParser::ConstantNode*>(on->arguments[1])->value;
index=codegen.get_name_map_pos(name);
named=true;
} else {
//regular indexing
if (from&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
index = _parse_expression(codegen,on->arguments[1],slevel);
if (index<0)
return index;
}
}
codegen.opcodes.push_back(named?GDFunction::OPCODE_GET_NAMED:GDFunction::OPCODE_GET); // perform operator
codegen.opcodes.push_back(from); // argument 1
codegen.opcodes.push_back(index); // argument 2 (unary only takes one parameter)
} break;
case GDParser::OperatorNode::OP_AND: {
// AND operator with early out on failure
int res = _parse_expression(codegen,on->arguments[0],p_stack_level);
if (res<0)
return res;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos=codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen,on->arguments[1],p_stack_level);
if (res<0)
return res;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(res);
int jump_fail_pos2=codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDFunction::OPCODE_ASSIGN_TRUE);
codegen.opcodes.push_back(p_stack_level|GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size()+3);
codegen.opcodes[jump_fail_pos]=codegen.opcodes.size();
codegen.opcodes[jump_fail_pos2]=codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_ASSIGN_FALSE);
codegen.opcodes.push_back(p_stack_level|GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
return p_stack_level|GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS;
} break;
case GDParser::OperatorNode::OP_OR: {
// OR operator with early out on success
int res = _parse_expression(codegen,on->arguments[0],p_stack_level);
if (res<0)
return res;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(res);
int jump_success_pos=codegen.opcodes.size();
codegen.opcodes.push_back(0);
res = _parse_expression(codegen,on->arguments[1],p_stack_level);
if (res<0)
return res;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF);
codegen.opcodes.push_back(res);
int jump_success_pos2=codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.alloc_stack(p_stack_level); //it will be used..
codegen.opcodes.push_back(GDFunction::OPCODE_ASSIGN_FALSE);
codegen.opcodes.push_back(p_stack_level|GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size()+3);
codegen.opcodes[jump_success_pos]=codegen.opcodes.size();
codegen.opcodes[jump_success_pos2]=codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_ASSIGN_TRUE);
codegen.opcodes.push_back(p_stack_level|GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
return p_stack_level|GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS;
} break;
//unary operators
case GDParser::OperatorNode::OP_NEG: { if (!_create_unary_operator(codegen,on,Variant::OP_NEGATE,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_NOT: { if (!_create_unary_operator(codegen,on,Variant::OP_NOT,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_BIT_INVERT: { if (!_create_unary_operator(codegen,on,Variant::OP_BIT_NEGATE,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_PREINC: { } break; //?
case GDParser::OperatorNode::OP_PREDEC: { } break;
case GDParser::OperatorNode::OP_INC: { } break;
case GDParser::OperatorNode::OP_DEC: { } break;
//binary operators (in precedence order)
case GDParser::OperatorNode::OP_IN: { if (!_create_binary_operator(codegen,on,Variant::OP_IN,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_EQUAL: { if (!_create_binary_operator(codegen,on,Variant::OP_EQUAL,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_NOT_EQUAL: { if (!_create_binary_operator(codegen,on,Variant::OP_NOT_EQUAL,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_LESS: { if (!_create_binary_operator(codegen,on,Variant::OP_LESS,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_LESS_EQUAL: { if (!_create_binary_operator(codegen,on,Variant::OP_LESS_EQUAL,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_GREATER: { if (!_create_binary_operator(codegen,on,Variant::OP_GREATER,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_GREATER_EQUAL: { if (!_create_binary_operator(codegen,on,Variant::OP_GREATER_EQUAL,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_ADD: { if (!_create_binary_operator(codegen,on,Variant::OP_ADD,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_SUB: { if (!_create_binary_operator(codegen,on,Variant::OP_SUBSTRACT,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_MUL: { if (!_create_binary_operator(codegen,on,Variant::OP_MULTIPLY,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_DIV: { if (!_create_binary_operator(codegen,on,Variant::OP_DIVIDE,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_MOD: { if (!_create_binary_operator(codegen,on,Variant::OP_MODULE,p_stack_level)) return -1;} break;
//case GDParser::OperatorNode::OP_SHIFT_LEFT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_LEFT,p_stack_level)) return -1;} break;
//case GDParser::OperatorNode::OP_SHIFT_RIGHT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_RIGHT,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_BIT_AND: { if (!_create_binary_operator(codegen,on,Variant::OP_BIT_AND,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_BIT_OR: { if (!_create_binary_operator(codegen,on,Variant::OP_BIT_OR,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_BIT_XOR: { if (!_create_binary_operator(codegen,on,Variant::OP_BIT_XOR,p_stack_level)) return -1;} break;
//shift
case GDParser::OperatorNode::OP_SHIFT_LEFT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_LEFT,p_stack_level)) return -1;} break;
case GDParser::OperatorNode::OP_SHIFT_RIGHT: { if (!_create_binary_operator(codegen,on,Variant::OP_SHIFT_RIGHT,p_stack_level)) return -1;} break;
//assignment operators
case GDParser::OperatorNode::OP_ASSIGN_ADD:
case GDParser::OperatorNode::OP_ASSIGN_SUB:
case GDParser::OperatorNode::OP_ASSIGN_MUL:
case GDParser::OperatorNode::OP_ASSIGN_DIV:
case GDParser::OperatorNode::OP_ASSIGN_MOD:
case GDParser::OperatorNode::OP_ASSIGN_SHIFT_LEFT:
case GDParser::OperatorNode::OP_ASSIGN_SHIFT_RIGHT:
case GDParser::OperatorNode::OP_ASSIGN_BIT_AND:
case GDParser::OperatorNode::OP_ASSIGN_BIT_OR:
case GDParser::OperatorNode::OP_ASSIGN_BIT_XOR:
case GDParser::OperatorNode::OP_INIT_ASSIGN:
case GDParser::OperatorNode::OP_ASSIGN: {
ERR_FAIL_COND_V(on->arguments.size()!=2,-1);
if (on->arguments[0]->type==GDParser::Node::TYPE_OPERATOR && (static_cast<GDParser::OperatorNode*>(on->arguments[0])->op==GDParser::OperatorNode::OP_INDEX || static_cast<GDParser::OperatorNode*>(on->arguments[0])->op==GDParser::OperatorNode::OP_INDEX_NAMED)) {
//SET (chained) MODE!!
#ifdef DEBUG_ENABLED
if (static_cast<GDParser::OperatorNode*>(on->arguments[0])->op==GDParser::OperatorNode::OP_INDEX_NAMED) {
const GDParser::OperatorNode* inon = static_cast<GDParser::OperatorNode*>(on->arguments[0]);
if (inon->arguments[0]->type==GDParser::Node::TYPE_SELF && codegen.script && codegen.function_node && !codegen.function_node->_static) {
const Map<StringName,GDScript::MemberInfo>::Element *MI = codegen.script->member_indices.find(static_cast<GDParser::IdentifierNode*>(inon->arguments[1])->name);
if (MI && MI->get().setter==codegen.function_node->name) {
String n = static_cast<GDParser::IdentifierNode*>(inon->arguments[1])->name;
_set_error("Must use '"+n+"' instead of 'self."+n+"' in setter.",inon);
return -1;
}
}
}
#endif
int slevel=p_stack_level;
GDParser::OperatorNode* op = static_cast<GDParser::OperatorNode*>(on->arguments[0]);
/* Find chain of sets */
List<GDParser::OperatorNode*> chain;
{
//create get/set chain
GDParser::OperatorNode* n=op;
while(true) {
chain.push_back(n);
if (n->arguments[0]->type!=GDParser::Node::TYPE_OPERATOR)
break;
n = static_cast<GDParser::OperatorNode*>(n->arguments[0]);
if (n->op!=GDParser::OperatorNode::OP_INDEX && n->op!=GDParser::OperatorNode::OP_INDEX_NAMED)
break;
}
}
/* Chain of gets */
//get at (potential) root stack pos, so it can be returned
int prev_pos = _parse_expression(codegen,chain.back()->get()->arguments[0],slevel);
if (prev_pos<0)
return prev_pos;
int retval=prev_pos;
//print_line("retval: "+itos(retval));
if (retval&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
Vector<int> setchain;
int prev_key_idx=-1;
for(List<GDParser::OperatorNode*>::Element *E=chain.back();E;E=E->prev()) {
if (E==chain.front()) //ignore first
break;
bool named = E->get()->op==GDParser::OperatorNode::OP_INDEX_NAMED;
int key_idx;
if (named) {
key_idx = codegen.get_name_map_pos(static_cast<const GDParser::IdentifierNode*>(E->get()->arguments[1])->name);
//printf("named key %x\n",key_idx);
} else {
if (prev_pos&(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)) {
slevel++;
codegen.alloc_stack(slevel);
}
GDParser::Node *key = E->get()->arguments[1];
key_idx = _parse_expression(codegen,key,slevel);
//printf("expr key %x\n",key_idx);
//stack was raised here if retval was stack but..
}
if (key_idx<0)
return key_idx;
codegen.opcodes.push_back(named ? GDFunction::OPCODE_GET_NAMED : GDFunction::OPCODE_GET);
codegen.opcodes.push_back(prev_pos);
codegen.opcodes.push_back(key_idx);
slevel++;
codegen.alloc_stack(slevel);
int dst_pos = (GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)|slevel;
codegen.opcodes.push_back(dst_pos);
//add in reverse order, since it will be reverted
setchain.push_back(dst_pos);
setchain.push_back(key_idx);
setchain.push_back(prev_pos);
setchain.push_back(named ? GDFunction::OPCODE_SET_NAMED : GDFunction::OPCODE_SET);
prev_pos=dst_pos;
prev_key_idx=key_idx;
}
setchain.invert();
int set_index;
bool named=false;
if (static_cast<const GDParser::OperatorNode*>(op)->op==GDParser::OperatorNode::OP_INDEX_NAMED) {
set_index=codegen.get_name_map_pos(static_cast<const GDParser::IdentifierNode*>(op->arguments[1])->name);
named=true;
} else {
set_index = _parse_expression(codegen,op->arguments[1],slevel+1);
named=false;
}
if (set_index<0)
return set_index;
if (set_index&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
int set_value = _parse_assign_right_expression(codegen,on,slevel+1);
if (set_value<0)
return set_value;
codegen.opcodes.push_back(named?GDFunction::OPCODE_SET_NAMED:GDFunction::OPCODE_SET);
codegen.opcodes.push_back(prev_pos);
codegen.opcodes.push_back(set_index);
codegen.opcodes.push_back(set_value);
for(int i=0;i<setchain.size();i+=4) {
codegen.opcodes.push_back(setchain[i+0]);
codegen.opcodes.push_back(setchain[i+1]);
codegen.opcodes.push_back(setchain[i+2]);
codegen.opcodes.push_back(setchain[i+3]);
}
return retval;
} else {
//ASSIGNMENT MODE!!
int slevel = p_stack_level;
int dst_address_a = _parse_expression(codegen,on->arguments[0],slevel,false,on->op==GDParser::OperatorNode::OP_INIT_ASSIGN);
if (dst_address_a<0)
return -1;
if (dst_address_a&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS) {
slevel++;
codegen.alloc_stack(slevel);
}
int src_address_b = _parse_assign_right_expression(codegen,on,slevel);
if (src_address_b<0)
return -1;
codegen.opcodes.push_back(GDFunction::OPCODE_ASSIGN); // perform operator
codegen.opcodes.push_back(dst_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
return dst_address_a; //if anything, returns wathever was assigned or correct stack position
}
} break;
case GDParser::OperatorNode::OP_EXTENDS: {
ERR_FAIL_COND_V(on->arguments.size()!=2,false);
int slevel = p_stack_level;
int src_address_a = _parse_expression(codegen,on->arguments[0],slevel);
if (src_address_a<0)
return -1;
if (src_address_a&GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)
slevel++; //uses stack for return, increase stack
int src_address_b = _parse_expression(codegen,on->arguments[1],slevel);
if (src_address_b<0)
return -1;
codegen.opcodes.push_back(GDFunction::OPCODE_EXTENDS_TEST); // perform operator
codegen.opcodes.push_back(src_address_a); // argument 1
codegen.opcodes.push_back(src_address_b); // argument 2 (unary only takes one parameter)
} break;
default: {
ERR_EXPLAIN("Bug in bytecode compiler, unexpected operator #"+itos(on->op)+" in parse tree while parsing expression.");
ERR_FAIL_V(0); //unreachable code
} break;
}
int dst_addr=(p_stack_level)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.opcodes.push_back(dst_addr); // append the stack level as destination address of the opcode
codegen.alloc_stack(p_stack_level);
return dst_addr;
} break;
//TYPE_TYPE,
default: {
ERR_EXPLAIN("Bug in bytecode compiler, unexpected node in parse tree while parsing expression.");
ERR_FAIL_V(-1); //unreachable code
} break;
}
ERR_FAIL_V(-1); //unreachable code
}
Error GDCompiler::_parse_block(CodeGen& codegen,const GDParser::BlockNode *p_block,int p_stack_level,int p_break_addr,int p_continue_addr) {
codegen.push_stack_identifiers();
int new_identifiers=0;
codegen.current_line=p_block->line;
for(int i=0;i<p_block->statements.size();i++) {
const GDParser::Node *s = p_block->statements[i];
switch(s->type) {
case GDParser::Node::TYPE_NEWLINE: {
const GDParser::NewLineNode *nl = static_cast<const GDParser::NewLineNode*>(s);
codegen.opcodes.push_back(GDFunction::OPCODE_LINE);
codegen.opcodes.push_back(nl->line);
codegen.current_line=nl->line;
} break;
case GDParser::Node::TYPE_CONTROL_FLOW: {
// try subblocks
const GDParser::ControlFlowNode *cf = static_cast<const GDParser::ControlFlowNode*>(s);
switch(cf->cf_type) {
case GDParser::ControlFlowNode::CF_IF: {
#ifdef DEBUG_ENABLED
codegen.opcodes.push_back(GDFunction::OPCODE_LINE);
codegen.opcodes.push_back(cf->line);
codegen.current_line=cf->line;
#endif
int ret = _parse_expression(codegen,cf->arguments[0],p_stack_level,false);
if (ret<0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(ret);
int else_addr=codegen.opcodes.size();
codegen.opcodes.push_back(0); //temporary
Error err = _parse_block(codegen,cf->body,p_stack_level,p_break_addr,p_continue_addr);
if (err)
return err;
if (cf->body_else) {
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
int end_addr=codegen.opcodes.size();
codegen.opcodes.push_back(0);
codegen.opcodes[else_addr]=codegen.opcodes.size();
Error err = _parse_block(codegen,cf->body_else,p_stack_level,p_break_addr,p_continue_addr);
if (err)
return err;
codegen.opcodes[end_addr]=codegen.opcodes.size();
} else {
//end without else
codegen.opcodes[else_addr]=codegen.opcodes.size();
}
} break;
case GDParser::ControlFlowNode::CF_FOR: {
int slevel=p_stack_level;
int iter_stack_pos=slevel;
int iterator_pos = (slevel++)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
int counter_pos = (slevel++)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
int container_pos = (slevel++)|(GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS);
codegen.alloc_stack(slevel);
codegen.push_stack_identifiers();
codegen.add_stack_identifier(static_cast<const GDParser::IdentifierNode*>(cf->arguments[0])->name,iter_stack_pos);
int ret = _parse_expression(codegen,cf->arguments[1],slevel,false);
if (ret<0)
return ERR_COMPILATION_FAILED;
//assign container
codegen.opcodes.push_back(GDFunction::OPCODE_ASSIGN);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(ret);
//begin loop
codegen.opcodes.push_back(GDFunction::OPCODE_ITERATE_BEGIN);
codegen.opcodes.push_back(counter_pos);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(codegen.opcodes.size()+4);
codegen.opcodes.push_back(iterator_pos);
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP); //skip code for next
codegen.opcodes.push_back(codegen.opcodes.size()+8);
//break loop
int break_pos=codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP); //skip code for next
codegen.opcodes.push_back(0); //skip code for next
//next loop
int continue_pos=codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_ITERATE);
codegen.opcodes.push_back(counter_pos);
codegen.opcodes.push_back(container_pos);
codegen.opcodes.push_back(break_pos);
codegen.opcodes.push_back(iterator_pos);
Error err = _parse_block(codegen,cf->body,slevel,break_pos,continue_pos);
if (err)
return err;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(continue_pos);
codegen.opcodes[break_pos+1]=codegen.opcodes.size();
codegen.pop_stack_identifiers();
} break;
case GDParser::ControlFlowNode::CF_WHILE: {
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(codegen.opcodes.size()+3);
int break_addr=codegen.opcodes.size();
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(0);
int continue_addr=codegen.opcodes.size();
int ret = _parse_expression(codegen,cf->arguments[0],p_stack_level,false);
if (ret<0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_IF_NOT);
codegen.opcodes.push_back(ret);
codegen.opcodes.push_back(break_addr);
Error err = _parse_block(codegen,cf->body,p_stack_level,break_addr,continue_addr);
if (err)
return err;
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(continue_addr);
codegen.opcodes[break_addr+1]=codegen.opcodes.size();
} break;
case GDParser::ControlFlowNode::CF_SWITCH: {
} break;
case GDParser::ControlFlowNode::CF_BREAK: {
if (p_break_addr<0) {
_set_error("'break'' not within loop",cf);
return ERR_COMPILATION_FAILED;
}
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(p_break_addr);
} break;
case GDParser::ControlFlowNode::CF_CONTINUE: {
if (p_continue_addr<0) {
_set_error("'continue' not within loop",cf);
return ERR_COMPILATION_FAILED;
}
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP);
codegen.opcodes.push_back(p_continue_addr);
} break;
case GDParser::ControlFlowNode::CF_RETURN: {
int ret;
if (cf->arguments.size()) {
ret = _parse_expression(codegen,cf->arguments[0],p_stack_level,false);
if (ret<0)
return ERR_PARSE_ERROR;
} else {
ret=GDFunction::ADDR_TYPE_NIL << GDFunction::ADDR_BITS;
}
codegen.opcodes.push_back(GDFunction::OPCODE_RETURN);
codegen.opcodes.push_back(ret);
} break;
}
} break;
case GDParser::Node::TYPE_ASSERT: {
// try subblocks
const GDParser::AssertNode *as = static_cast<const GDParser::AssertNode*>(s);
int ret = _parse_expression(codegen,as->condition,p_stack_level,false);
if (ret<0)
return ERR_PARSE_ERROR;
codegen.opcodes.push_back(GDFunction::OPCODE_ASSERT);
codegen.opcodes.push_back(ret);
} break;
case GDParser::Node::TYPE_BREAKPOINT: {
// try subblocks
codegen.opcodes.push_back(GDFunction::OPCODE_BREAKPOINT);
} break;
case GDParser::Node::TYPE_LOCAL_VAR: {
const GDParser::LocalVarNode *lv = static_cast<const GDParser::LocalVarNode*>(s);
codegen.add_stack_identifier(lv->name,p_stack_level++);
codegen.alloc_stack(p_stack_level);
new_identifiers++;
} break;
default: {
//expression
int ret = _parse_expression(codegen,s,p_stack_level,true);
if (ret<0)
return ERR_PARSE_ERROR;
} break;
}
}
codegen.pop_stack_identifiers();
return OK;
}
Error GDCompiler::_parse_function(GDScript *p_script,const GDParser::ClassNode *p_class,const GDParser::FunctionNode *p_func,bool p_for_ready) {
Vector<int> bytecode;
CodeGen codegen;
codegen.class_node=p_class;
codegen.script=p_script;
codegen.function_node=p_func;
codegen.stack_max=0;
codegen.current_line=0;
codegen.call_max=0;
codegen.debug_stack=ScriptDebugger::get_singleton()!=NULL;
Vector<StringName> argnames;
int stack_level=0;
if (p_func) {
for(int i=0;i<p_func->arguments.size();i++) {
int idx = i;
codegen.add_stack_identifier(p_func->arguments[i],i);
#ifdef TOOLS_ENABLED
argnames.push_back(p_func->arguments[i]);
#endif
}
stack_level=p_func->arguments.size();
}
codegen.alloc_stack(stack_level);
/* Parse initializer -if applies- */
bool is_initializer=!p_for_ready && !p_func;
if (is_initializer || (p_func && String(p_func->name)=="_init")) {
//parse initializer for class members
if (!p_func && p_class->extends_used && p_script->native.is_null()){
//call implicit parent constructor
codegen.opcodes.push_back(GDFunction::OPCODE_CALL_SELF_BASE);
codegen.opcodes.push_back(codegen.get_name_map_pos("_init"));
codegen.opcodes.push_back(0);
codegen.opcodes.push_back((GDFunction::ADDR_TYPE_STACK<<GDFunction::ADDR_BITS)|0);
}
Error err = _parse_block(codegen,p_class->initializer,stack_level);
if (err)
return err;
is_initializer=true;
}
if (p_for_ready || (p_func && String(p_func->name)=="_ready")) {
//parse initializer for class members
if (p_class->ready->statements.size()) {
Error err = _parse_block(codegen,p_class->ready,stack_level);
if (err)
return err;
}
}
/* Parse default argument code -if applies- */
Vector<int> defarg_addr;
StringName func_name;
if (p_func) {
if (p_func->default_values.size()) {
codegen.opcodes.push_back(GDFunction::OPCODE_JUMP_TO_DEF_ARGUMENT);
defarg_addr.push_back(codegen.opcodes.size());
for(int i=0;i<p_func->default_values.size();i++) {
_parse_expression(codegen,p_func->default_values[i],stack_level,true);
defarg_addr.push_back(codegen.opcodes.size());
}
defarg_addr.invert();
}
Error err = _parse_block(codegen,p_func->body,stack_level);
if (err)
return err;
func_name=p_func->name;
} else {
if (p_for_ready)
func_name="_ready";
else
func_name="_init";
}
codegen.opcodes.push_back(GDFunction::OPCODE_END);
GDFunction *gdfunc=NULL;
//if (String(p_func->name)=="") { //initializer func
// gdfunc = &p_script->initializer;
//} else { //regular func
p_script->member_functions[func_name]=memnew(GDFunction);
gdfunc = p_script->member_functions[func_name];
//}
if (p_func)
gdfunc->_static=p_func->_static;
#ifdef TOOLS_ENABLED
gdfunc->arg_names=argnames;
#endif
//constants
if (codegen.constant_map.size()) {
gdfunc->_constant_count=codegen.constant_map.size();
gdfunc->constants.resize(codegen.constant_map.size());
gdfunc->_constants_ptr=&gdfunc->constants[0];
const Variant *K=NULL;
while((K=codegen.constant_map.next(K))) {
int idx = codegen.constant_map[*K];
gdfunc->constants[idx]=*K;
}
} else {
gdfunc->_constants_ptr=NULL;
gdfunc->_constant_count=0;
}
//global names
if (codegen.name_map.size()) {
gdfunc->global_names.resize(codegen.name_map.size());
gdfunc->_global_names_ptr = &gdfunc->global_names[0];
for(Map<StringName,int>::Element *E=codegen.name_map.front();E;E=E->next()) {
gdfunc->global_names[E->get()]=E->key();
}
gdfunc->_global_names_count=gdfunc->global_names.size();
} else {
gdfunc->_global_names_ptr = NULL;
gdfunc->_global_names_count =0;
}
if (codegen.opcodes.size()) {
gdfunc->code=codegen.opcodes;
gdfunc->_code_ptr=&gdfunc->code[0];
gdfunc->_code_size=codegen.opcodes.size();
} else {
gdfunc->_code_ptr=NULL;
gdfunc->_code_size=0;
}
if (defarg_addr.size()) {
gdfunc->default_arguments=defarg_addr;
gdfunc->_default_arg_count=defarg_addr.size()-1;
gdfunc->_default_arg_ptr=&gdfunc->default_arguments[0];
} else {
gdfunc->_default_arg_count=0;
gdfunc->_default_arg_ptr=NULL;
}
gdfunc->_argument_count=p_func ? p_func->arguments.size() : 0;
gdfunc->_stack_size=codegen.stack_max;
gdfunc->_call_size=codegen.call_max;
gdfunc->name=func_name;
#ifdef DEBUG_ENABLED
if (ScriptDebugger::get_singleton()){
String signature;
//path
if (p_script->get_path()!=String())
signature+=p_script->get_path();
//loc
if (p_func) {
signature+="::"+itos(p_func->body->line);
} else {
signature+="::0";
}
//funciton and class
if (p_class->name) {
signature+="::"+String(p_class->name)+"."+String(func_name);;
} else {
signature+="::"+String(func_name);
}
gdfunc->profile.signature=signature;
}
#endif
gdfunc->_script=p_script;
gdfunc->source=source;
#ifdef DEBUG_ENABLED
{
gdfunc->func_cname=(String(source)+" - "+String(func_name)).utf8();
gdfunc->_func_cname=gdfunc->func_cname.get_data();
}
#endif
if (p_func) {
gdfunc->_initial_line=p_func->line;
} else {
gdfunc->_initial_line=0;
}
if (codegen.debug_stack)
gdfunc->stack_debug=codegen.stack_debug;
if (is_initializer)
p_script->initializer=gdfunc;
return OK;
}
Error GDCompiler::_parse_class(GDScript *p_script, GDScript *p_owner, const GDParser::ClassNode *p_class, bool p_keep_state) {
Map<StringName,Ref<GDScript> > old_subclasses;
if (p_keep_state) {
old_subclasses=p_script->subclasses;
}
p_script->native=Ref<GDNativeClass>();
p_script->base=Ref<GDScript>();
p_script->_base=NULL;
p_script->members.clear();
p_script->constants.clear();
for (Map<StringName,GDFunction*>::Element *E=p_script->member_functions.front();E;E=E->next()) {
memdelete(E->get());
}
p_script->member_functions.clear();
p_script->member_indices.clear();
p_script->member_info.clear();
p_script->initializer=NULL;
p_script->subclasses.clear();
p_script->_owner=p_owner;
p_script->tool=p_class->tool;
p_script->name=p_class->name;
int index_from=0;
Ref<GDNativeClass> native;
if (p_class->extends_used) {
//do inheritance
String path = p_class->extends_file;
Ref<GDScript> script;
if (path!="") {
//path (and optionally subclasses)
if (path.is_rel_path()) {
String base;
if (p_owner) {
GDScript *current_class = p_owner;
while (current_class != NULL) {
base=current_class->get_path();
if (base=="")
current_class = current_class->_owner;
else
break;
}
}
else {
base = p_script->get_path();
}
if (base=="" || base.is_rel_path()) {
_set_error("Could not resolve relative path for parent class: "+path,p_class);
return ERR_FILE_NOT_FOUND;
}
path=base.get_base_dir().plus_file(path).simplify_path();
}
script = ResourceLoader::load(path);
if (script.is_null()) {
_set_error("Could not load base class: "+path,p_class);
return ERR_FILE_NOT_FOUND;
}
if (!script->valid) {
_set_error("Script not fully loaded (cyclic preload?): "+path,p_class);
return ERR_BUSY;
}
//print_line("EXTENDS PATH: "+path+" script is "+itos(script.is_valid())+" indices is "+itos(script->member_indices.size())+" valid? "+itos(script->valid));
if (p_class->extends_class.size()) {
for(int i=0;i<p_class->extends_class.size();i++) {
String sub = p_class->extends_class[i];
if (script->subclasses.has(sub)) {
script=script->subclasses[sub];
} else {
_set_error("Could not find subclass: "+sub,p_class);
return ERR_FILE_NOT_FOUND;
}
}
}
} else {
ERR_FAIL_COND_V(p_class->extends_class.size()==0,ERR_BUG);
//look around for the subclasses
String base=p_class->extends_class[0];
GDScript *p = p_owner;
Ref<GDScript> base_class;
while(p) {
if (p->subclasses.has(base)) {
base_class=p->subclasses[base];
break;
}
p=p->_owner;
}
if (base_class.is_valid()) {
for(int i=1;i<p_class->extends_class.size();i++) {
String subclass=p_class->extends_class[i];
if (base_class->subclasses.has(subclass)) {
base_class=base_class->subclasses[subclass];
} else {
_set_error("Could not find subclass: "+subclass,p_class);
return ERR_FILE_NOT_FOUND;
}
}
script=base_class;
} else {
if (p_class->extends_class.size()>1) {
_set_error("Invalid inheritance (unknown class+subclasses)",p_class);
return ERR_FILE_NOT_FOUND;
}
//if not found, try engine classes
if (!GDScriptLanguage::get_singleton()->get_global_map().has(base)) {
_set_error("Unknown class: '"+base+"'",p_class);
return ERR_FILE_NOT_FOUND;
}
int base_idx = GDScriptLanguage::get_singleton()->get_global_map()[base];
native = GDScriptLanguage::get_singleton()->get_global_array()[base_idx];
if (!native.is_valid()) {
_set_error("Global not a class: '"+base+"'",p_class);
return ERR_FILE_NOT_FOUND;
}
}
}
if (script.is_valid()) {
p_script->base=script;
p_script->_base=p_script->base.ptr();
p_script->member_indices=script->member_indices;
} else if (native.is_valid()) {
p_script->native=native;
} else {
_set_error("Could not determine inheritance",p_class);
return ERR_FILE_NOT_FOUND;
}
}
//print_line("Script: "+p_script->get_path()+" indices: "+itos(p_script->member_indices.size()));
for(int i=0;i<p_class->variables.size();i++) {
StringName name = p_class->variables[i].identifier;
if (p_script->member_indices.has(name)) {
_set_error("Member '"+name+"' already exists (in current or parent class)",p_class);
return ERR_ALREADY_EXISTS;
}
if (p_class->variables[i]._export.type!=Variant::NIL) {
p_script->member_info[name]=p_class->variables[i]._export;
#ifdef TOOLS_ENABLED
if (p_class->variables[i].default_value.get_type()!=Variant::NIL) {
p_script->member_default_values[name]=p_class->variables[i].default_value;
}
#endif
}
//int new_idx = p_script->member_indices.size();
GDScript::MemberInfo minfo;
minfo.index = p_script->member_indices.size();
minfo.setter = p_class->variables[i].setter;
minfo.getter = p_class->variables[i].getter;
p_script->member_indices[name]=minfo;
p_script->members.insert(name);
}
for(int i=0;i<p_class->constant_expressions.size();i++) {
StringName name = p_class->constant_expressions[i].identifier;
ERR_CONTINUE( p_class->constant_expressions[i].expression->type!=GDParser::Node::TYPE_CONSTANT );
GDParser::ConstantNode *constant = static_cast<GDParser::ConstantNode*>(p_class->constant_expressions[i].expression);
p_script->constants.insert(name,constant->value);
//p_script->constants[constant->value].make_const();
}
for(int i=0;i<p_class->_signals.size();i++) {
StringName name = p_class->_signals[i].name;
GDScript *c = p_script;
while(c) {
if (c->_signals.has(name)) {
_set_error("Signal '"+name+"' redefined (in current or parent class)",p_class);
return ERR_ALREADY_EXISTS;
}
if (c->base.is_valid()) {
c=c->base.ptr();
} else {
c=NULL;
}
}
if (native.is_valid()) {
if (ObjectTypeDB::has_signal(native->get_name(),name)) {
_set_error("Signal '"+name+"' redefined (original in native class '"+String(native->get_name())+"')",p_class);
return ERR_ALREADY_EXISTS;
}
}
p_script->_signals[name]=p_class->_signals[i].arguments;
}
//parse sub-classes
for(int i=0;i<p_class->subclasses.size();i++) {
StringName name = p_class->subclasses[i]->name;
Ref<GDScript> subclass;
if (old_subclasses.has(name)) {
subclass=old_subclasses[name];
} else {
subclass.instance();
}
Error err = _parse_class(subclass.ptr(),p_script,p_class->subclasses[i],p_keep_state);
if (err)
return err;
p_script->constants.insert(name,subclass); //once parsed, goes to the list of constants
p_script->subclasses.insert(name,subclass);
}
//parse methods
bool has_initializer=false;
bool has_ready=false;
for(int i=0;i<p_class->functions.size();i++) {
if (!has_initializer && p_class->functions[i]->name=="_init")
has_initializer=true;
if (!has_ready && p_class->functions[i]->name=="_ready")
has_ready=true;
Error err = _parse_function(p_script,p_class,p_class->functions[i]);
if (err)
return err;
}
//parse static methods
for(int i=0;i<p_class->static_functions.size();i++) {
Error err = _parse_function(p_script,p_class,p_class->static_functions[i]);
if (err)
return err;
}
if (!has_initializer) {
//create a constructor
Error err = _parse_function(p_script,p_class,NULL);
if (err)
return err;
}
if (!has_ready && p_class->ready->statements.size()) {
//create a constructor
Error err = _parse_function(p_script,p_class,NULL,true);
if (err)
return err;
}
#ifdef DEBUG_ENABLED
//validate setters/getters if debug is enabled
for(int i=0;i<p_class->variables.size();i++) {
if (p_class->variables[i].setter) {
const Map<StringName,GDFunction*>::Element *E=p_script->get_member_functions().find(p_class->variables[i].setter);
if (!E) {
_set_error("Setter function '"+String(p_class->variables[i].setter)+"' not found in class.",NULL);
err_line=p_class->variables[i].line;
err_column=0;
return ERR_PARSE_ERROR;
}
if (E->get()->is_static()) {
_set_error("Setter function '"+String(p_class->variables[i].setter)+"' is static.",NULL);
err_line=p_class->variables[i].line;
err_column=0;
return ERR_PARSE_ERROR;
}
}
if (p_class->variables[i].getter) {
const Map<StringName,GDFunction*>::Element *E=p_script->get_member_functions().find(p_class->variables[i].getter);
if (!E) {
_set_error("Getter function '"+String(p_class->variables[i].getter)+"' not found in class.",NULL);
err_line=p_class->variables[i].line;
err_column=0;
return ERR_PARSE_ERROR;
}
if (E->get()->is_static()) {
_set_error("Getter function '"+String(p_class->variables[i].getter)+"' is static.",NULL);
err_line=p_class->variables[i].line;
err_column=0;
return ERR_PARSE_ERROR;
}
}
}
//validate instances if keeping state
if (p_keep_state) {
print_line("RELOAD KEEP "+p_script->path);
for (Set<Object*>::Element *E=p_script->instances.front();E;) {
Set<Object*>::Element *N = E->next();
ScriptInstance *si = E->get()->get_script_instance();
if (si->is_placeholder()) {
#ifdef TOOLS_ENABLED
PlaceHolderScriptInstance *psi = static_cast<PlaceHolderScriptInstance*>(si);
if (p_script->is_tool()) {
//re-create as an instance
p_script->placeholders.erase(psi); //remove placeholder
GDInstance* instance = memnew( GDInstance );
instance->base_ref=E->get()->cast_to<Reference>();
instance->members.resize(p_script->member_indices.size());
instance->script=Ref<GDScript>(p_script);
instance->owner=E->get();
//needed for hot reloading
for(Map<StringName,GDScript::MemberInfo>::Element *E=p_script->member_indices.front();E;E=E->next()) {
instance->member_indices_cache[E->key()]=E->get().index;
}
instance->owner->set_script_instance(instance);
/* STEP 2, INITIALIZE AND CONSRTUCT */
Variant::CallError ce;
p_script->initializer->call(instance,NULL,0,ce);
if (ce.error!=Variant::CallError::CALL_OK) {
//well, tough luck, not goinna do anything here
}
}
#endif
} else {
GDInstance *gi = static_cast<GDInstance*>(si);
gi->reload_members();
}
E=N;
}
}
#endif
p_script->valid=true;
return OK;
}
Error GDCompiler::compile(const GDParser *p_parser,GDScript *p_script,bool p_keep_state) {
err_line=-1;
err_column=-1;
error="";
parser=p_parser;
const GDParser::Node* root = parser->get_parse_tree();
ERR_FAIL_COND_V(root->type!=GDParser::Node::TYPE_CLASS,ERR_INVALID_DATA);
source=p_script->get_path();
Error err = _parse_class(p_script,NULL,static_cast<const GDParser::ClassNode*>(root),p_keep_state);
if (err)
return err;
return OK;
}
String GDCompiler::get_error() const {
return error;
}
int GDCompiler::get_error_line() const{
return err_line;
}
int GDCompiler::get_error_column() const{
return err_column;
}
GDCompiler::GDCompiler()
{
}
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