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main.cpp
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//
// main.cpp
// LACI_Compiler
//
// Created by 박상권 on 2021/05/27.
//
#include <iostream>
#include <vector>
#include <unistd.h>
using namespace std;
void decision();
void evenodd();
void operation();
void prevset();
FILE* input_code = fopen("input.txt", "r");
int EAX, EBX, EIP, COPY, next_EIP = -1;
char prev_F = '.', prev_E = '.';
struct CODE {
char c[3];
};
vector<CODE> code;
vector<int> S;
void decision() {
CODE tmp = code[EIP];
if(tmp.c[0] == 'L') {
if(prev_F == 'A') {
if(!S.empty()) {
if(S.back() == 0) next_EIP = EBX;
}
}
if(prev_F == 'C') {
if(!S.empty()) {
COPY = S.back();
}
}
} else if(tmp.c[0] == 'A') {
if(prev_F == 'I') {
while(!S.empty()) {
S.pop_back();
}
}
} else if(tmp.c[0] == 'C') {
if(prev_F == 'L') {
if(!S.empty()) {
if(EAX > 0) {
EAX--;
next_EIP = EBX;
}
}
} else if(prev_F == 'I') {
if(!S.empty()) {
int tmp = S.back() + (1<<7);
S.pop_back();
S.push_back(tmp);
}
}
} else if(tmp.c[0] == 'I') {
if(prev_F == 'L') {
S.push_back(COPY);
} else if(prev_F == 'A') {
if(S.size() >= 2) {
int tmp1 = S[S.size()-1];
int tmp2 = S[S.size()-2];
if(tmp1 == tmp2) S.push_back(1);
else S.push_back(0);
}
}
}
if(next_EIP != -1) {
EIP = next_EIP;
next_EIP = -1;
} else {
evenodd();
}
}
void evenodd() {
CODE tmp = code[EIP];
int cur_E = tmp.c[1] == 'L' || tmp.c[1] == 'A' ? 'E' : 'O';
if(prev_E == cur_E) {
if(prev_E == 'E') {
if(!S.empty()) S[S.size()-1] = S.back() << 1;
}
if(prev_E == 'O') {
if(!S.empty()) S[S.size()-1] = S.back() >> 1;
}
}
operation();
}
void operation() {
CODE tmp = code[EIP];
if(tmp.c[0] == 'L') {
if(tmp.c[1] == 'L' || tmp.c[1] == 'C') {
if(tmp.c[2] == 'L') {
if(!S.empty()) {
EAX = S.back();
}
} else if(tmp.c[2] == 'A') {
S.push_back(EAX);
} else if(tmp.c[2] == 'C') {
if(!S.empty()) {
EBX = S.back();
}
} else if(tmp.c[2] == 'I') {
S.push_back(EBX);
}
}
if(tmp.c[1] == 'A' || tmp.c[1] == 'I') {
if(tmp.c[2] == 'L') {
EBX = EIP+1;
} else if(tmp.c[2] == 'A') {
exit(0);
}
}
} else if(tmp.c[0] == 'A') {
if(tmp.c[1] == 'L' || tmp.c[1] == 'C') {
if(tmp.c[2] == 'L') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1+tmp2);
}
} else if(tmp.c[2] == 'A') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1-tmp2);
}
} else if(tmp.c[2] == 'C') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1*tmp2);
}
} else if(tmp.c[2] == 'I') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1/tmp2);
}
}
}
if(tmp.c[1] == 'A' || tmp.c[1] == 'I') {
if(tmp.c[2] == 'L') {
if(!S.empty()) {
S[S.size()-1] = S.back()+1;
}
} else if(tmp.c[2] == 'A') {
if(!S.empty()) {
S[S.size()-1] = S.back()-1;
}
} else if(tmp.c[2] == 'I') {
if(!S.empty()) S.pop_back();
}
}
} else if(tmp.c[0] == 'C') {
if(tmp.c[1] == 'L' || tmp.c[1] == 'C') {
if(tmp.c[2] == 'L') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1 & tmp2);
}
} else if(tmp.c[2] == 'A') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1 | tmp2);
}
} else if(tmp.c[2] == 'C') {
if(S.size() >= 1) {
int tmp1 = S.back();
S.pop_back();
S.push_back(!tmp1);
}
} else if(tmp.c[2] == 'I') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1 ^ tmp2);
}
}
}
if(tmp.c[1] == 'A' || tmp.c[1] == 'I') {
if(tmp.c[2] == 'L') {
S.push_back(0);
} else if(tmp.c[2] == 'A') {
S.push_back(S.empty());
} else if(tmp.c[2] == 'I') {
if(S.size() >= 2) {
int tmp2 = S.back();
S.pop_back();
int tmp1 = S.back();
S.pop_back();
S.push_back(tmp1 < tmp2);
}
}
}
} else if(tmp.c[0] == 'I') {
if(tmp.c[1] == 'L' || tmp.c[1] == 'C') {
if(tmp.c[2] == 'L') {
int tmp1;
scanf("%d", &tmp1);
S.push_back(tmp1);
} else if(tmp.c[2] == 'A') {
char tmp1;
scanf("%c", &tmp1);
S.push_back((int)tmp1);
} else if(tmp.c[2] == 'C') {
printf("%d", S.back());
} else if(tmp.c[2] == 'I') {
printf("%c", (char)S.back());
}
}
if(tmp.c[1] == 'A' || tmp.c[1] == 'I') {
if(tmp.c[2] == 'L') {
printf("%d", S.back());
S.pop_back();
} else if(tmp.c[2] == 'A') {
printf("%c", (char)S.back());
S.pop_back();
}
}
}
prevset();
}
void prevset() {
prev_F = code[EIP].c[0];
prev_E = code[EIP].c[1] == 'L' || code[EIP].c[1] == 'A' ? 'E' : 'O';
if(next_EIP == -1) EIP++;
else EIP = next_EIP;
next_EIP = -1;
}
int main(int argc, const char * argv[]) {
CODE tmp;
while(fscanf(input_code, "%3s", tmp.c) != EOF) {
code.push_back(tmp);
}
while(1) {
decision();
// S;
// next_EIP = next_EIP;
// sleep(1);
}
}