From 34a4ab54f7f1e58396a636d322c2a674c04e2344 Mon Sep 17 00:00:00 2001
From: tomsmeding <hallo@tomsmeding.nl>
Date: Wed, 14 Oct 2015 21:46:42 +0200
Subject: Add beginnings of cripp

---
 .gitignore      |   1 +
 cripp/Makefile  |   2 +
 cripp/cripp.cpp | 328 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 331 insertions(+)
 create mode 100644 cripp/Makefile
 create mode 100644 cripp/cripp.cpp

diff --git a/.gitignore b/.gitignore
index dc5aaf2..210dcfe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 rip
 *.hi
 *.o
+*.dSYM
diff --git a/cripp/Makefile b/cripp/Makefile
new file mode 100644
index 0000000..925e6f7
--- /dev/null
+++ b/cripp/Makefile
@@ -0,0 +1,2 @@
+CXX = g++
+CXXFLAGS = -Wall -Wextra -O2 -std=c++11 -lgmp -lgmpxx
\ No newline at end of file
diff --git a/cripp/cripp.cpp b/cripp/cripp.cpp
new file mode 100644
index 0000000..0e193b0
--- /dev/null
+++ b/cripp/cripp.cpp
@@ -0,0 +1,328 @@
+#include <iostream>
+#include <fstream>
+#include <exception>
+#include <cctype>
+#include <gmpxx.h>
+
+#undef RIPMODE
+#undef DEBUGMODE
+
+using namespace std;
+
+typedef mpz_class ripint;
+
+template <typename T>
+int integral(T v){
+	return (int)v;
+}
+template <>
+int integral<mpz_class>(mpz_class v){
+	return v.get_si();
+}
+
+template <typename T>
+class Llist{
+	struct Node{
+		T value;
+		Node *prev,*next;
+
+		inline Node(void):prev(NULL),next(NULL){}
+	};
+
+	Node *first,*last;
+	int sz;
+
+public:
+	inline Llist(void):first(NULL),last(NULL),sz(0){}
+	inline ~Llist(void){
+		Node *n;
+		while(first){
+			n=first->next;
+			delete first;
+			first=n;
+		}
+	}
+
+	inline int size(void){return sz;}
+
+	inline void push_back(T v){
+		Node *n=new Node;
+		swap(n->value,v);
+		if(last==NULL)first=last=n;
+		else {
+			last->next=n;
+			n->prev=last;
+			last=n;
+		}
+		sz++;
+	}
+	inline void push_front(T v){
+		Node *n=new Node;
+		swap(n->value,v);
+		if(first==NULL)first=last=n;
+		else {
+			first->prev=n;
+			n->next=first;
+			first=n;
+		}
+		sz++;
+	}
+	inline void pop_back(void){
+		if(last==NULL)throw length_error("pop_back on empty Llist");
+		Node *n=last;
+		last=last->prev;
+		if(last==NULL)first=NULL;
+		else last->next=NULL;
+		delete n;
+		sz--;
+	}
+	inline void pop_front(void){
+		if(first==NULL)throw length_error("pop_front on empty Llist");
+		Node *n=first;
+		first=first->next;
+		if(first==NULL)last=NULL;
+		else first->prev=NULL;
+		delete n;
+		sz--;
+	}
+
+	inline T& back(void){
+		if(last==NULL)throw length_error("back on empty Llist");
+		return last->value;
+	}
+	inline T& front(void){
+		if(first==NULL)throw length_error("front on empty Llist");
+		return first->value;
+	}
+
+	inline void* itemp(int i){
+		if(i>=0){
+			Node *n=first;
+			while(i-->0)n=n->next;
+			return n;
+		} else {
+			Node *n=last;
+			while(++i<0)n=n->prev;
+			return n;
+		}
+	}
+
+	inline void* frontp(void){return first;}
+	inline void* backp(void){return last;}
+
+	inline void erase(void *p){
+		Node *n=(Node*)p;
+		if(n->prev)n->prev->next=n->next; else first=n->next;
+		if(n->next)n->next->prev=n->prev; else last=n->prev;
+		sz--;
+		delete n;
+	}
+	inline void insertafter(void *after,T v){
+		Node *aftern=(Node*)after;
+		Node *n=new Node;
+		swap(n->value,v);
+		n->prev=aftern;
+		if(aftern->next){
+			n->next=aftern->next;
+			aftern->next->prev=n;
+			aftern->next=n;
+		} else {
+			aftern->next=n;
+			last=n;
+		}
+		sz++;
+	}
+
+	static inline void* nextp(void *p){return ((Node*)p)->next;}
+	static inline void* prevp(void *p){return ((Node*)p)->prev;}
+	static inline T& valueof(void *p){return ((Node*)p)->value;}
+};
+
+#ifdef RIPMODE
+void riperror(string){
+	cerr<<"rip"<<endl;
+	exit(1);
+}
+#else
+void riperror(string s){
+	throw runtime_error(s);
+}
+#endif
+
+void buildjumpmap(char *code,int len,int *jumpmap){
+	Llist<int> stack;
+	int i;
+	int iwidx=-1,fidx=-1,lastangleidx=-1;
+	for(i=0;i<len;i++){
+		if(isspace(code[i]))continue;
+		if(code[i]=='['){
+			stack.push_back(i);
+			if(iwidx!=-1)jumpmap[iwidx]=i;
+			if(lastangleidx!=-1)jumpmap[lastangleidx]=i;
+		} else if(code[i]==']'){
+			if(stack.size()==0)riperror("Unexpected closing ']'");
+			const int start=stack.back();
+			stack.pop_back();
+			jumpmap[start]=i;
+			jumpmap[i]=start;
+		} else if(code[i]=='<'){
+			if(fidx!=-1)jumpmap[fidx]=i;
+			const int start=i;
+			for(i++;i<len;i++)if(code[i]=='>')break;
+			if(i==len)riperror("Unmatched open '<'");
+			jumpmap[start]=i;
+			lastangleidx=i; //the '>'
+		} else if(code[i]=='>'){
+			riperror("Unexpected closing '>'");
+		} else if(code[i]=='W'||code[i]=='I'){
+			iwidx=i;
+		} else if(code[i]=='F'){
+			fidx=i;
+		}
+		if(iwidx!=i)iwidx=-1;
+		if(fidx!=i)fidx=-1;
+		if(lastangleidx!=i)lastangleidx=-1;
+	}
+}
+
+void runcode(const char *code,const int *jumpmap,Llist<ripint> &stack,const int startat=0){
+	int i;
+	for(i=startat;code[i];i++){
+#ifdef DEBUGMODE
+		cout<<'[';
+		for(void *p=stack.frontp();p;p=Llist<ripint>::nextp(p)){
+			cout<<Llist<ripint>::valueof(p)<<' ';
+		}
+		cout<<']'<<endl;
+#endif
+		if(code[i]>='0'&&code[i]<='9'){
+			stack.push_back(code[i]-'0');
+			continue;
+		}
+		switch(code[i]){
+			case 'P':
+				stack.pop_back();
+				break;
+			case 'S':{
+				const ripint b=stack.back(); stack.pop_back();
+				const ripint a=stack.back(); stack.pop_back();
+				stack.push_back(b);
+				stack.push_back(a);
+				break;
+			}
+			case 'D':
+				stack.push_back(stack.back());
+				break;
+			case 'i':
+				stack.back()++;
+				break;
+			case 'd':
+				stack.back()--;
+				break;
+			case 'r':{
+				const int n=integral(stack.back()); stack.pop_back();
+				const ripint value=stack.back(); stack.pop_back();
+				if(n==stack.size()+1)stack.push_front(value);
+				else {
+					void *const before=stack.itemp(-n);
+					stack.insertafter(before,value);
+				}
+				break;
+			}
+			case 'R':{
+				const int n=integral(stack.back()); stack.pop_back();
+				void *const p=stack.itemp(-n);
+				stack.push_back(Llist<ripint>::valueof(p));
+				stack.erase(p);
+				break;
+			}
+			case 'l':
+				stack.push_back(stack.size());
+				break;
+			case 'a': case 's': case 'm': case 'q': case 'G': case 'L': case 'E':{
+				const ripint b=stack.back(); stack.pop_back();
+				const ripint a=stack.back(); stack.pop_back();
+				switch(code[i]){
+					case 'a': stack.push_back(a+b); break;
+					case 's': stack.push_back(a-b); break;
+					case 'm': stack.push_back(a*b); break;
+					case 'q': stack.push_back(a/b); break;
+					case 'G': stack.push_back(a>b); break;
+					case 'L': stack.push_back(a<b); break;
+					case 'E': stack.push_back(a==b); break;
+				}
+				break;
+			}
+			case 'n':
+				stack.back()=!integral(stack.back());
+				break;
+			case 'I': {
+				if(jumpmap[i]==0)riperror("No code block after 'I'");
+				const int cond=integral(stack.back()); stack.pop_back();
+				if(cond){
+					runcode(code,jumpmap,stack,jumpmap[i]+1);
+				}
+				i=jumpmap[jumpmap[i]];
+				break;
+			}
+			case 'W': {
+				if(jumpmap[i]==0)riperror("No code block after 'W'");
+				int cond;
+				while(true){
+					cond=integral(stack.back()); stack.pop_back();
+					//cerr<<"whiling on "<<string(code+i-2,5)<<"; cond="<<cond<<endl;
+					if(!cond)break;
+					runcode(code,jumpmap,stack,jumpmap[i]+1);
+				}
+				i=jumpmap[jumpmap[i]];
+				break;
+			}
+			case 'o':
+				cout<<(char)integral(stack.back());
+				stack.pop_back();
+				break;
+			case 'O':
+				cout<<stack.back();
+				stack.pop_back();
+				break;
+			case 'g':{
+				char c;
+				cin>>c;
+				stack.push_back((int)c);
+				break;
+			}
+			case '$':
+				for(void *p=stack.frontp();p;p=Llist<ripint>::nextp(p)){
+					cout<<Llist<ripint>::valueof(p)<<' ';
+				}
+				cout<<endl;
+				break;
+			case ']':
+				return;
+		}
+	}
+}
+
+int main(int argc,char **argv){
+	if(argc!=2){
+		cout<<"Pass a rip file as the command-line argument"<<endl;
+		return 1;
+	}
+	ifstream codef(argv[1]);
+	codef.seekg(0,ios::end);
+	const size_t len=codef.tellg();
+	codef.seekg(0);
+	char *code=new char[len+1];
+	codef.read(code,len);
+	code[len]='\0';
+	codef.close();
+
+	int *jumpmap=new int[len]();
+	buildjumpmap(code,len,jumpmap);
+
+	Llist<ripint> stack;
+	runcode(code,jumpmap,stack);
+
+	delete[] jumpmap;
+	delete[] code;
+}
-- 
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