forked from xxq250/Nasal-Interpreter
291 lines
12 KiB
C++
291 lines
12 KiB
C++
#ifndef __NASAL_RUNTIME_H__
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#define __NASAL_RUNTIME_H__
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class nasal_runtime
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{
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private:
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// global scope is a hash_map
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// main_local_scope is used in main block
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// when calling a loop or conditional expression
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// when adding a new identifier into scope,you need to check if this identifier is already in the scope.
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std::map<std::string,int> global_scope;
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std::list<std::map<std::string,int> > main_local_scope;
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// see detail of each enum type in function error_interrupt(const int)
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enum runtime_error_type
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{
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__incorrect_head_of_tree,
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__incorrect_head_of_func,
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__stack_overflow,
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};
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int runtime_error_exit_mark;
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void error_interrupt (const int);
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int number_generation (abstract_syntax_tree&);
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int string_generation (abstract_syntax_tree&);
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int vector_generation (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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int hash_generation (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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int function_generation(std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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int calculation (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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int call_identifier (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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void assignment (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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void definition (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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void loop_expr (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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void conditional (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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void func_proc (std::list<std::map<std::string,int> >&,abstract_syntax_tree&);
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public:
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nasal_runtime()
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{
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global_scope.clear();
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nasal_gc.gc_init();
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return;
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}
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~nasal_runtime()
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{
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global_scope.clear();
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nasal_gc.gc_init();
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return;
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}
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void main_proc(abstract_syntax_tree&);
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};
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void nasal_runtime::error_interrupt(const int type)
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{
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std::string error_head=">> [Runtime] fatal error: ";
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switch (type)
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{
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case __incorrect_head_of_tree:
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std::cout<<error_head<<"the abstract syntax tree's root type is not \'__root\'.please make sure that lib is loaded."<<std::endl;break;
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case __incorrect_head_of_func:
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std::cout<<error_head<<"called identifier is not a function."<<std::endl;break;
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case __stack_overflow:
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std::cout<<error_head<<"stack overflow."<<std::endl;break;
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default:
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std::cout<<error_head<<"unknown error."<<std::endl;break;
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}
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runtime_error_exit_mark=type;
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return;
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}
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int nasal_runtime::number_generation(abstract_syntax_tree& node)
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{
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int addr=nasal_gc.gc_alloc();
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nasal_gc.get_scalar(addr).set_type(scalar_number);
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nasal_gc.get_scalar(addr).get_number().set_number(node.get_var_number());
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return addr;
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}
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int nasal_runtime::string_generation(abstract_syntax_tree& node)
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{
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int addr=nasal_gc.gc_alloc();
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nasal_gc.get_scalar(addr).set_type(scalar_string);
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nasal_gc.get_scalar(addr).get_string().set_string(node.get_var_string());
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return addr;
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}
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int nasal_runtime::vector_generation(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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int addr=nasal_gc.gc_alloc();
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nasal_gc.get_scalar(addr).set_type(scalar_vector);
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for(std::list<abstract_syntax_tree>::iterator i=node.get_children().begin();i!=node.get_children().end();++i)
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{
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int var_type=i->get_node_type();
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if(var_type==__number)
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nasal_gc.get_scalar(addr).get_vector().vec_push(number_generation(*i));
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else if(var_type==__string)
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nasal_gc.get_scalar(addr).get_vector().vec_push(string_generation(*i));
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else if(var_type==__vector)
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nasal_gc.get_scalar(addr).get_vector().vec_push(vector_generation(local_scope,*i));
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else if(var_type==__hash)
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nasal_gc.get_scalar(addr).get_vector().vec_push(hash_generation(local_scope,*i));
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else if(var_type==__function)
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nasal_gc.get_scalar(addr).get_vector().vec_push(function_generation(local_scope,*i));
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else if(var_type==__id)
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nasal_gc.get_scalar(addr).get_vector().vec_push(call_identifier(local_scope,*i));
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else
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{
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;
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}
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}
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return addr;
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}
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int nasal_runtime::hash_generation(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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int addr=nasal_gc.gc_alloc();
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nasal_gc.get_scalar(addr).set_type(scalar_hash);
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nasal_gc.get_scalar(addr).get_hash().set_self_addr(addr);
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for(std::list<abstract_syntax_tree>::iterator i=node.get_children().begin();i!=node.get_children().end();++i)
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{
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if(i->get_node_type()!=__hash_member)
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break;
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else
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{
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std::string member_name=i->get_children().front().get_var_string();
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int var_type=i->get_children().back().get_node_type();
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if(var_type==__number)
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;
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else if(var_type==__string)
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;
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else if(var_type==__vector)
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;
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else if(var_type==__hash)
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;
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else if(var_type==__function)
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{
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// hash's function must get a parent_hash_addr
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// this address will be given to identifier 'me'
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nasal_gc.get_scalar(addr).get_hash().hash_push(member_name,function_generation(local_scope,i->get_children().back()));
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nasal_gc.get_scalar(nasal_gc.get_scalar(addr).get_hash().get_hash_member(member_name)).get_function().set_parent_hash_addr(addr);
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}
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else
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{
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;
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}
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}
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}
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return addr;
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}
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int nasal_runtime::function_generation(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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int addr=nasal_gc.gc_alloc();
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nasal_gc.get_scalar(addr).set_type(scalar_function);
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nasal_gc.get_scalar(addr).get_function().set_local_scope(local_scope);
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nasal_gc.get_scalar(addr).get_function().set_statement_block(node);
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return addr;
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}
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int nasal_runtime::calculation(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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int operator_type=node.get_node_type();
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if(operator_type==__add_operator)
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{
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node.get_children().front();
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node.get_children().back();
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}
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return -1;
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}
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int nasal_runtime::call_identifier(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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if(local_scope.empty())
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;
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return -1;
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}
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void nasal_runtime::assignment(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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if(local_scope.empty())
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;
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return;
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}
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void nasal_runtime::definition(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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if(local_scope.empty())
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;
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return;
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}
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void nasal_runtime::loop_expr(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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std::map<std::string,int> new_scope;
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local_scope.push_back(new_scope);
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return;
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}
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void nasal_runtime::conditional(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& node)
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{
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std::map<std::string,int> new_scope;
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local_scope.push_back(new_scope);
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return;
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}
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void nasal_runtime::func_proc(std::list<std::map<std::string,int> >& local_scope,abstract_syntax_tree& func_root)
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{
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if(func_root.get_node_type()!=__function)
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{
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error_interrupt(__incorrect_head_of_func);
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return;
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}
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std::map<std::string,int> new_scope;
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local_scope.push_back(new_scope);
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for(std::list<abstract_syntax_tree>::iterator iter=func_root.get_children().front().get_children().begin();iter!=func_root.get_children().front().get_children().end();++iter)
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{
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}
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for(std::list<abstract_syntax_tree>::iterator iter=func_root.get_children().back().get_children().begin();iter!=func_root.get_children().back().get_children().end();++iter)
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{
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// use local value node_type to avoid calling function too many times.
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int node_type=iter->get_node_type();
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if(node_type==__number || node_type==__string)
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;
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// only number or string
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else if(node_type==__id)
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this->call_identifier(local_scope,*iter);
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else if(node_type==__vector)
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this->vector_generation(local_scope,*iter);
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else if(node_type==__hash)
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this->hash_generation(local_scope,*iter);
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else if(node_type==__function)
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this->function_generation(local_scope,*iter);
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else if(node_type==__add_operator || node_type==__sub_operator || node_type==__mul_operator || node_type==__div_operator || node_type==__link_operator ||
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node_type==__cmp_equal || node_type==__cmp_less || node_type==__cmp_more || node_type==__cmp_not_equal || node_type==__cmp_less_or_equal || node_type==__cmp_more_or_equal ||
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node_type==__and_operator || node_type==__or_operator || node_type==__ques_mark ||
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node_type==__equal || node_type==__add_equal || node_type==__sub_equal || node_type==__div_equal || node_type==__mul_equal || node_type==__link_equal)
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this->calculation(local_scope,*iter);
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else if(node_type==__definition)
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this->definition(local_scope,*iter);
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else if(node_type==__conditional)
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this->conditional(local_scope,*iter);
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else if((node_type==__while) || (node_type==__for) || (node_type==__foreach) || (node_type==__forindex))
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this->loop_expr(local_scope,*iter);
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if(runtime_error_exit_mark>=0)
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break;
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}
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return;
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}
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void nasal_runtime::main_proc(abstract_syntax_tree& root)
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{
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time_t begin_time,end_time;
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begin_time=std::time(NULL);
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// initializing global scope and nasal_gc
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// runtime_error_exit_mark is set to -1,if runtime_error_exit_mark >=0,this means an error occurred
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global_scope.clear();
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nasal_gc.gc_init();
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runtime_error_exit_mark=-1;
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if(root.get_node_type()!=__root)
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{
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error_interrupt(__incorrect_head_of_tree);
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return;
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}
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for(std::list<abstract_syntax_tree>::iterator iter=root.get_children().begin();iter!=root.get_children().end();++iter)
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{
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// use local value node_type to avoid calling function too many times.
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int node_type=iter->get_node_type();
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if(node_type==__number || node_type==__string)
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;
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else if(node_type==__id)
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this->call_identifier(main_local_scope,*iter);
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else if(node_type==__vector)
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this->vector_generation(main_local_scope,*iter);
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else if(node_type==__hash)
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this->hash_generation(main_local_scope,*iter);
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else if(node_type==__function)
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this->function_generation(main_local_scope,*iter);
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else if(node_type==__add_operator || node_type==__sub_operator || node_type==__mul_operator || node_type==__div_operator || node_type==__link_operator ||
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node_type==__cmp_equal || node_type==__cmp_less || node_type==__cmp_more || node_type==__cmp_not_equal || node_type==__cmp_less_or_equal || node_type==__cmp_more_or_equal ||
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node_type==__and_operator || node_type==__or_operator || node_type==__ques_mark ||
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node_type==__equal || node_type==__add_equal || node_type==__sub_equal || node_type==__div_equal || node_type==__mul_equal || node_type==__link_equal)
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this->calculation(main_local_scope,*iter);
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else if(node_type==__definition)
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this->definition(main_local_scope,*iter);
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else if(node_type==__conditional)
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this->conditional(main_local_scope,*iter);
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else if((node_type==__while) || (node_type==__for) || (node_type==__foreach) || (node_type==__forindex))
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this->loop_expr(main_local_scope,*iter);
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if(runtime_error_exit_mark>=0)
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break;
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}
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end_time=std::time(NULL);
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std::cout<<">> [Runtime] process exited after "<<end_time-begin_time<<" s ."<<std::endl;
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return;
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}
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#endif |