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/*************************************************************************/
/* gd_compiler.h */
/*************************************************************************/
/* 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. */
/*************************************************************************/
#ifndef GD_COMPILER_H
#define GD_COMPILER_H
#include "gd_parser.h"
#include "gd_script.h"
class GDCompiler {
const GDParser *parser;
struct CodeGen {
GDScript *script;
const GDParser::ClassNode *class_node;
const GDParser::FunctionNode *function_node;
bool debug_stack;
List< Map<StringName,int> > stack_id_stack;
Map<StringName,int> stack_identifiers;
List<GDFunction::StackDebug> stack_debug;
List< Map<StringName,int> > block_identifier_stack;
Map<StringName,int> block_identifiers;
void add_stack_identifier(const StringName& p_id,int p_stackpos) {
stack_identifiers[p_id]=p_stackpos;
if (debug_stack) {
block_identifiers[p_id]=p_stackpos;
GDFunction::StackDebug sd;
sd.added=true;
sd.line=current_line;
sd.identifier=p_id;
sd.pos=p_stackpos;
stack_debug.push_back(sd);
}
}
void push_stack_identifiers() {
stack_id_stack.push_back( stack_identifiers );
if (debug_stack) {
block_identifier_stack.push_back(block_identifiers);
block_identifiers.clear();
}
}
void pop_stack_identifiers() {
stack_identifiers = stack_id_stack.back()->get();
stack_id_stack.pop_back();
if (debug_stack) {
for (Map<StringName,int>::Element *E=block_identifiers.front();E;E=E->next()) {
GDFunction::StackDebug sd;
sd.added=false;
sd.identifier=E->key();
sd.line=current_line;
sd.pos=E->get();
stack_debug.push_back(sd);
}
block_identifiers=block_identifier_stack.back()->get();
block_identifier_stack.pop_back();
}
}
//int get_identifier_pos(const StringName& p_dentifier) const;
HashMap<Variant,int,VariantHasher> constant_map;
Map<StringName,int> name_map;
int get_name_map_pos(const StringName& p_identifier) {
int ret;
if (!name_map.has(p_identifier)) {
ret=name_map.size();
name_map[p_identifier]=ret;
} else {
ret=name_map[p_identifier];
}
return ret;
}
int get_constant_pos(const Variant& p_constant) {
if (constant_map.has(p_constant))
return constant_map[p_constant];
int pos = constant_map.size();
constant_map[p_constant]=pos;
return pos;
}
Vector<int> opcodes;
void alloc_stack(int p_level) { if (p_level >= stack_max) stack_max=p_level+1; }
void alloc_call(int p_params) { if (p_params >= call_max) call_max=p_params; }
int current_line;
int stack_max;
int call_max;
};
#if 0
void _create_index(const GDParser::OperatorNode *on);
void _create_call(const GDParser::OperatorNode *on);
int _parse_expression(const GDParser::Node *p_expr,CodeGen& codegen);
void _parse_block(GDParser::BlockNode *p_block);
void _parse_function(GDParser::FunctionNode *p_func);
Ref<GDScript> _parse_class(GDParser::ClassNode *p_class);
#endif
void _set_error(const String& p_error,const GDParser::Node *p_node);
bool _create_unary_operator(CodeGen& codegen,const GDParser::OperatorNode *on,Variant::Operator op, int p_stack_level);
bool _create_binary_operator(CodeGen& codegen,const GDParser::OperatorNode *on,Variant::Operator op, int p_stack_level,bool p_initializer=false);
//int _parse_subexpression(CodeGen& codegen,const GDParser::BlockNode *p_block,const GDParser::Node *p_expression);
int _parse_assign_right_expression(CodeGen& codegen,const GDParser::OperatorNode *p_expression, int p_stack_level);
int _parse_expression(CodeGen& codegen,const GDParser::Node *p_expression, int p_stack_level,bool p_root=false,bool p_initializer=false);
Error _parse_block(CodeGen& codegen,const GDParser::BlockNode *p_block,int p_stack_level=0,int p_break_addr=-1,int p_continue_addr=-1);
Error _parse_function(GDScript *p_script,const GDParser::ClassNode *p_class,const GDParser::FunctionNode *p_func,bool p_for_ready=false);
Error _parse_class(GDScript *p_script,GDScript *p_owner,const GDParser::ClassNode *p_class);
int err_line;
int err_column;
StringName source;
String error;
public:
Error compile(const GDParser *p_parser,GDScript *p_script);
String get_error() const;
int get_error_line() const;
int get_error_column() const;
GDCompiler();
};
#endif // COMPILER_H
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