Nasal-Interpreter/main.cpp

144 lines
3.9 KiB
C++

#include "nasal.h"
#define VM_LEXINFO 1
#define VM_ASTINFO 2
#define VM_CODEINFO 4
#define VM_EXECTIME 8
#define VM_OPCALLNUM 16
#define VM_EXEC 32
void help_cmd()
{
std::cout
#ifdef _WIN32
<<"use command \'chcp 65001\' if want to use unicode.\n"
#endif
<<"nasal <option>\n"
<<"option:\n"
<<" -h, --help | get help.\n"
<<" -v, --version | get version of nasal interpreter.\n\n"
<<"nasal <file>\n"
<<"file:\n"
<<" input file name to execute script file.\n\n"
<<"nasal [options] <file>\n"
<<"option:\n"
<<" -l, --lex | view token info.\n"
<<" -a, --ast | view abstract syntax tree.\n"
<<" -c, --code | view bytecode.\n"
<<" -t, --time | execute and get the running time.\n"
<<" -o, --opcnt | count operands while running.\n"
<<"file:\n"
<<" input file name to execute script file.\n";
return;
}
void logo()
{
std::cout
<<" __ _ \n"
<<" /\\ \\ \\__ _ ___ __ _| | \n"
<<" / \\/ / _` / __|/ _` | | \n"
<<" / /\\ / (_| \\__ \\ (_| | | \n"
<<" \\_\\ \\/ \\__,_|___/\\__,_|_|\n"
<<"nasal interpreter ver 8.0\n"
<<"thanks to : https://github.com/andyross/nasal\n"
<<"code repo : https://github.com/ValKmjolnir/Nasal-Interpreter\n"
<<"code repo : https://gitee.com/valkmjolnir/Nasal-Interpreter\n"
<<"lang info : http://wiki.flightgear.org/Nasal_scripting_language\n"
<<"input \"nasal -h\" to get help .\n";
return;
}
void die(const char* stage,const std::string& filename)
{
std::cout<<"["<<stage<<"] in <"<<filename<<">: error(s) occurred,stop.\n";
std::exit(1);
}
void cmderr()
{
std::cout
<<"invalid argument(s).\n"
<<"use nasal -h to get help.\n";
std::exit(1);
}
void execute(const std::string& file,const uint16_t cmd)
{
nasal_lexer lexer;
nasal_parse parse;
nasal_import import;
nasal_codegen codegen;
nasal_vm vm;
lexer.open(file);
lexer.scan();
if(lexer.err())
die("lexer",file);
if(cmd&VM_LEXINFO)
lexer.print();
parse.compile(lexer.get_tokens());
if(parse.err())
die("parse",file);
if(cmd&VM_ASTINFO)
parse.get_root().print(0);
// first used file is itself
import.link(parse.get_root(),file);
if(import.err())
die("import",file);
codegen.compile(import.get_root(),import.get_file());
if(codegen.err())
die("code",file);
if(cmd&VM_CODEINFO)
codegen.print();
vm.init(
codegen.get_strs(),
codegen.get_nums(),
import.get_file()
);
if(cmd&VM_EXECTIME)
{
clock_t t=clock();
vm.run(codegen.get_code(),cmd&VM_OPCALLNUM);
std::cout<<"process exited after "<<((double)(clock()-t))/CLOCKS_PER_SEC<<"s.\n";
}
else if(cmd&VM_EXEC)
vm.run(codegen.get_code(),cmd&VM_OPCALLNUM);
vm.clear();
return;
}
int main(int argc,const char* argv[])
{
std::string filename;
uint16_t cmd=0;
if(argc==2 && (!strcmp(argv[1],"-v") || !strcmp(argv[1],"--version")))
logo();
else if(argc==2 && (!strcmp(argv[1],"-h") || !strcmp(argv[1],"--help")))
help_cmd();
else if(argc==2 && argv[1][0]!='-')
cmd|=VM_EXEC;
else if(argc>=3)
{
for(int i=1;i<argc-1;++i)
{
std::string s(argv[i]);
if(s=="--lex" || s=="-l")
cmd|=VM_LEXINFO;
else if(s=="--ast" || s=="-a")
cmd|=VM_ASTINFO;
else if(s=="--code" || s=="-c")
cmd|=VM_CODEINFO;
else if(s=="--opcnt" || s=="-o")
cmd|=VM_OPCALLNUM|VM_EXEC;
else if(s=="--time" || s=="-t")
cmd|=VM_EXECTIME;
else
cmderr();
}
}
else
cmderr();
if(argv[argc-1][0]=='-')
cmderr();
if(cmd)
execute(argv[argc-1],cmd);
return 0;
}