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#include <fstream>
#include <vector>
#include <string>
#include <unordered_map>
#include <cctype>
#include <cassert>
#include "parse.h"
void trim(string &str){
while(str.size()>0&&isspace(str[0]))str.erase(0,1);
while(str.size()>0&&isspace(str.back()))str.erase(str.size()-1,1);
}
void squashSpaces(string &str){
bool sp=false;
for(size_t i=0;i<str.size();i++){
if(isspace(str[i])){
if(sp){
str.erase(i,1);
i--;
} else {
str[i]=' ';
sp=true;
}
} else {
sp=false;
}
}
}
vector<string> splittrim(const string &str,char sep){
if(str.size()==0)return {};
vector<string> res;
size_t cursor=0;
while(true){
size_t idx=str.find(sep,cursor);
if(idx==string::npos){
string s=str.substr(cursor);
trim(s);
res.push_back(s);
return res;
}
string s=str.substr(cursor,idx-cursor);
trim(s);
res.push_back(s);
cursor=idx+1;
}
}
void lowercase(string &str){
for(size_t i=0;i<str.size();i++){
str[i]=tolower(str[i]);
}
}
Argument parseArgument(const string &str,const unordered_map<string,Location> &labels,Location ip){
if(str[0]=='#'||str[0]=='%'){
bool remote=str[0]=='%';
if(isdigit(str[1])){
int num=atoi(str.data()+1);
assert(num>=1&&num<=20);
return {arg_t::var,remote,num,{}};
} else {
return {arg_t::name,remote,0,str.substr(1)};
}
} else if(str[0]=='@'){
if(labels.find(str.substr(1))==labels.end()){
return {arg_t::undeflabel,false,0,str.substr(1)};
}
Location ref=labels.find(str.substr(1))->second;
assert(ref.bank==ip.bank);
return {arg_t::number,false,ref.pos-ip.pos,{}};
} else if(str[0]=='$'){
return {arg_t::constant,false,0,str.substr(1)};
} else if(isdigit(str[0])){
return {arg_t::number,false,atoi(str.data()),{}};
} else {
assert(false);
}
}
Team assemble(const string &source){
Team team;
unordered_map<string,Location> labels;
for(string line : splittrim(source,'\n')){
if(line.size()==0)continue;
string word1=line.substr(0,line.find(' '));
string word2r=line.find(' ')==string::npos?"":line.substr(line.find(' ')+1);
if(word1=="published"){
string word2=word2r.substr(0,word2r.find(' '));
string word3r=word2r.find(' ')==string::npos?"":word2r.substr(word2r.find(' ')+1);
if(word2=="name"){
team.name=word3r;
}
} else if(word1=="bank"){
team.banks.emplace_back();
} else if(word1[0]=='@'){
assert(line.find(' ')==string::npos);
assert(labels.find(word1.substr(1))==labels.end());
labels[word1.substr(1)]={(int)team.banks.size()-1,(int)team.banks.back().size()};
} else {
assert(team.banks.size()>0);
vector<string> args=splittrim(word2r,',');
vector<Argument> pargs;
for(const string &s : args){
pargs.push_back(parseArgument(s,labels,
{(int)team.banks.size()-1,(int)team.banks.back().size()}));
}
if(word1=="jump"||word1=="turn"||word1=="scan")assert(pargs.size()==1);
else if(word1=="die"||word1=="move")assert(pargs.size()==0);
else if(word1=="create")assert(pargs.size()==3);
else assert(pargs.size()==2);
Script &s=team.banks.back();
if(word1=="set")s.push_back(Instruction::make(ins_t::set,{pargs[0],pargs[1]}));
else if(word1=="add")s.push_back(Instruction::make(ins_t::add,{pargs[0],pargs[1]}));
else if(word1=="sub")s.push_back(Instruction::make(ins_t::sub,{pargs[0],pargs[1]}));
else if(word1=="comp")s.push_back(Instruction::make(ins_t::comp,{pargs[0],pargs[1]}));
else if(word1=="trans")s.push_back(Instruction::make(ins_t::trans,{pargs[0],pargs[1]}));
else if(word1=="jump")s.push_back(Instruction::make(ins_t::jump,{pargs[0]}));
else if(word1=="bjump")s.push_back(Instruction::make(ins_t::bjump,{pargs[0],pargs[1]}));
else if(word1=="die")s.push_back(Instruction::make(ins_t::die,{}));
else if(word1=="move")s.push_back(Instruction::make(ins_t::move,{}));
else if(word1=="turn")s.push_back(Instruction::make(ins_t::turn,{pargs[0]}));
else if(word1=="scan")s.push_back(Instruction::make(ins_t::scan,{pargs[0]}));
else if(word1=="create")s.push_back(Instruction::make(ins_t::create,{pargs[0],pargs[1],pargs[2]}));
else assert(false);
}
}
int bank=0;
for(Script &script : team.banks){
int pos=0;
for(Instruction &ins : script){
for(Argument &arg : ins.args){
if(arg.type==arg_t::undeflabel){
assert(labels.find(arg.name)!=labels.end());
assert(labels[arg.name].bank==bank);
arg.type=arg_t::number;
arg.num=labels[arg.name].pos-pos;
}
}
pos++;
}
bank++;
}
return team;
}
string preprocess(istream &file){
unordered_map<string,string> defines;
string result;
string line;
while(getline(file,line)){
if(line.find(';')!=string::npos){
line.erase(line.find(';'));
}
trim(line);
if(line.size()==0)continue;
squashSpaces(line);
lowercase(line);
string word1=line.substr(0,line.find(' '));
if(word1=="define"){
string word2r=line.find(' ')==string::npos?"":line.substr(line.find(' ')+1);
string word2=word2r.substr(0,word2r.find(' '));
string word3r=word2r.find(' ')==string::npos?"":word2r.substr(word2r.find(' ')+1);
assert(defines.find(word2.substr(1))==defines.end());
assert(word3r[0]=='{');
string value=word3r.substr(1);
assert(word3r.find('}')==string::npos||word3r.find('}')==word3r.size()-1);
if(word3r.back()!='}'){
while(true){
char c=file.get();
if(c=='}')break;
value+=c;
}
assert(file.get()=='\n');
} else {
value.erase(value.size()-1);
}
defines[word2.substr(1)]=value;
} else {
while(line.find('&')!=string::npos){
size_t start=line.find('&')+1;
size_t end=line.find_first_not_of("abcdefghijklmnopqrstuvwxyz0123456789._",start);
if(end==string::npos)end=line.size();
assert(defines.find(line.substr(start,end-start))!=defines.end());
line=line.substr(0,start-1)+defines.find(line.substr(start,end-start))->second+line.substr(end);
}
result+=line+'\n';
}
}
return result;
}
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