xxq250/Nasal-Interpreter
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version 3.0
This commit is contained in:
Valk Richard Li
2020-10-23 14:53:04 +08:00
parent 479eb457c9
commit 84f09cb932
91 changed files with 8428 additions and 26899 deletions
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main.cpp Normal file
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#include "nasal.h"
nasal_resource resource;
nasal_lexer lexer;
nasal_parse parse;
nasal_import preprocessor;
nasal_codegen code_generator;
std::string command;
std::string inputfile="null";
nasal_runtime runtime;
void help()
{
std::cout<<">> [\"file\"] input a file name.\n";
std::cout<<">> [clear ] clear the screen.\n";
std::cout<<">> [del ] clear the input filename.\n";
std::cout<<">> [rs ] print source code.\n";
std::cout<<">> [lex ] use lexer to turn code into tokens.\n";
std::cout<<">> [ast ] do parsing and check the abstract syntax tree.\n";
std::cout<<">> [run ] run abstract syntax tree.\n";
std::cout<<">> [exec ] generate byte code.\n";
std::cout<<">> [erun ] run byte code.\n";
std::cout<<">> [logo ] print logo of nasal .\n";
std::cout<<">> [exit ] quit nasal interpreter.\n";
return;
}
void logo()
{
std::cout<<" __ _ \n";
std::cout<<" /\\ \\ \\__ _ ___ __ _| | \n";
std::cout<<" / \\/ / _` / __|/ _` | | \n";
std::cout<<" / /\\ / (_| \\__ \\ (_| | | \n";
std::cout<<" \\_\\ \\/ \\__,_|___/\\__,_|_|\n";
return;
}
void del_func()
{
resource.clear();
lexer.clear();
parse.clear();
inputfile="null";
std::cout<<">> [Delete] complete.\n";
return;
}
void die(std::string stage,std::string filename)
{
std::cout<<">> ["<<stage<<"] in <\""<<filename<<"\">: error(s) occurred,stop.\n";
return;
}
void lex_func()
{
if(!resource.input_file(inputfile))
{
die("resource",inputfile);
return;
}
lexer.scanner(resource.get_file());
if(lexer.get_error())
{
die("lexer",inputfile);
return;
}
lexer.print_token();
return;
}
void ast_print()
{
if(!resource.input_file(inputfile))
{
die("resource",inputfile);
return;
}
lexer.scanner(resource.get_file());
if(lexer.get_error())
{
die("lexer",inputfile);
return;
}
parse.set_toklist(lexer.get_token_list());
parse.main_process();
if(parse.get_error())
{
die("parse",inputfile);
return;
}
parse.get_root().print_ast(0);
return;
}
void runtime_start()
{
if(!resource.input_file(inputfile))
{
die("resource",inputfile);
return;
}
lexer.scanner(resource.get_file());
if(lexer.get_error())
{
die("lexer",inputfile);
return;
}
parse.set_toklist(lexer.get_token_list());
parse.main_process();
if(parse.get_error())
{
die("parse",inputfile);
return;
}
preprocessor.preprocessing(parse.get_root());
if(preprocessor.get_error())
{
die("import",inputfile);
return;
}
runtime.set_root(preprocessor.get_root());
runtime.run();
return;
}
void codegen_start()
{
if(!resource.input_file(inputfile))
{
die("resource",inputfile);
return;
}
lexer.scanner(resource.get_file());
if(lexer.get_error())
{
die("lexer",inputfile);
return;
}
parse.set_toklist(lexer.get_token_list());
parse.main_process();
if(parse.get_error())
{
die("parse",inputfile);
return;
}
preprocessor.preprocessing(parse.get_root());
if(preprocessor.get_error())
{
die("import",inputfile);
return;
}
runtime.set_root(preprocessor.get_root());
code_generator.output_exec(inputfile+".naexec",preprocessor.get_root());
if(code_generator.get_error())
{
die("code",inputfile);
return;
}
return;
}
void execution_start()
{
code_generator.load_exec(inputfile,preprocessor.get_root());
if(code_generator.get_error())
{
die("code",inputfile);
return;
}
runtime.set_root(preprocessor.get_root());
runtime.run();
return;
}
int main()
{
#ifdef _WIN32
// use chcp 65001 to use unicode io
system("chcp 65001");
system("cls");
#endif
logo();
#ifdef _WIN32
std::cout<<">> [system] Windows system.\n";
#endif
#ifdef _linux_
std::cout<<">> [system] Linux system.\n";
#endif
#ifdef TARGET_OS_MAC
std::cout<<">> [system] MacOS system.\n";
#endif
std::cout<<">> Nasal interpreter ver 3.0 .\n";
std::cout<<">> Code: https://github.com/ValKmjolnir/Nasal-Interpreter\n";
std::cout<<">> Info: http://wiki.flightgear.org/Nasal_scripting_language\n";
std::cout<<">> Input \"help\" to get help .\n";
while(1)
{
std::cout<<">> ";
std::cin>>command;
if(command=="help")
help();
else if(command=="clear")
{
#ifdef _WIN32
system("cls");
#endif
#ifdef _linux_
system("clear");
#endif
#ifdef TARGET_OS_MAC
system("clear");
#endif
}
else if(command=="del")
del_func();
else if(command=="rs")
{
if(resource.input_file(inputfile))
resource.print_file();
}
else if(command=="lex")
lex_func();
else if(command=="ast")
ast_print();
else if(command=="run")
runtime_start();
else if(command=="exec")
codegen_start();
else if(command=="erun")
execution_start();
else if(command=="logo")
logo();
else if(command=="exit")
break;
else
{
inputfile=command;
std::ifstream fin(command);
if(fin.fail())
{
std::cout<<">> [file] cannot open file \""<<command<<"\".\n";
inputfile="null";
}
fin.close();
}
}
return 0;
}