vlib.h

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#ifndef RVALS
#define RVALS 2 // max bits in reg/wire divided by 32
#endif

#ifndef _VLIB_H_FILE_
#define _VLIB_H_FILE_

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <ctime>
#include <cstdio>

#define MAXARG 2000

typedef unsigned long long int rval;
#define Sizeofrval sizeof(rval)

class module;

enum SignalMode 
{
    mnone = 0, 
    mreg, 
    mwire, 
    minput, 
    moutput, 
    minout, 
    mnum, 
    mtemp
};

class Signal
{
public:
    Signal ();
    Signal (rval);
    Signal (int);
    Signal (unsigned int);
    Signal (const char*);
    Signal (int bits, rval value);
    void create();
    void init (int, int, const char*);
    void init(const char* rname){init(0, 0, rname);};
    void init(Signal* shost, int h, int l, const char* rname);
    void makemask();
#ifdef VGEN
    std::string& getname(){return name;};
    std::string& getorname(){return orname;};
    std::string& getcatname();
    void setname (std::string& rname){name = rname;};
    void setorname (std::string& rname){orname = rname;};
    void setbrackets(const char* l, const char* r){lb = l; rb = r;};
#endif
    rval getr(){return r;};
    int getint(){return (unsigned int)r;};
    int getl(){return l;};
    int geth(){return h;};
    rval getmask(){return mask;};
    void setr(rval rv){r = rv & mask;};
    void setrc(rval rv){rc = rv & mask;};
    void sethlmask(int high, int low, rval imask){h = high; l = low; mask = imask;};
//  bool getbool(){return (r != 0);};
    bool getbool(){return (getval() != 0);};
    int getposedge(){return pedge;};
    int getnegedge(){return nedge;};
    int getchange(){return change;};
    void setchange(int ch){change = ch;};
    void setposedge(int ch){pedge = ch;};
    void setnegedge(int ch){nedge = ch;};
    void setalwaysn(int n) {alwaysn = (n == -1) ? 0 : n;};
    int  getalwaysn(){return alwaysn;};
    void setprintable(int p){printable = p;};
    rval getval();

    Signal set(Signal);
    Signal asgn(Signal);
    Signal operator=  (Signal);

    Signal operator+  (Signal);
    Signal operator-  (Signal);
    Signal operator*  (Signal);
    Signal operator/  (Signal);
    Signal operator%  (Signal);
    Signal operator^  (Signal);
    Signal operator>> (Signal);
    Signal operator<< (Signal);
    Signal operator&  (Signal);
    Signal operator&& (Signal);
    Signal operator|  (Signal);
    Signal operator|| (Signal);

    Signal operator<  (Signal);
    Signal operator>  (Signal);
    Signal operator<= (Signal);
    Signal operator>= (Signal);
    Signal operator== (Signal);
    Signal operator!= (Signal);

    Signal operator!  ();
    Signal operator~  ();
    Signal* operator&  ();
    Signal operator++  (){return *this = *this + 1;};
    Signal operator--  (){return *this = *this - 1;};
    Signal operator++  (int){return *this = *this + 1;};        // postfix operators require some work (different names for operations and assignment printing?)
    Signal operator--  (int){return *this = *this - 1;};

    friend Signal ror (Signal);
    friend Signal rxor (Signal);
    friend Signal rand (Signal);


    Signal operator()(Signal, Signal);
    Signal operator()(Signal);

    Signal operator,(Signal);

    friend std::ostream &operator<<(std::ostream &stream, Signal s);

    void input (int, int, const char*);
    void input (const char* rname){input(0, 0, rname);};
    void clock (const char* rname);

    void output (int, int, const char*);
    void output (const char* rname){output(0, 0, rname);};
    void output (int high, int low, const char* rname, module* parent);
    void output (const char* rname, module* parent);

    void inout (int, int, const char*);
    void inout (const char* rname){inout(0, 0, rname);};

    void reg (int, int, const char*);
    void initreg (int, int, const char*);
    void reg (const char* rname){reg(0, 0, rname);};

    void wire (int, int, const char*);
    void wire (int, int, const char*, int);
    void wire (const char* rname){wire(0, 0, rname);};


protected:
    rval r; // value holder
    rval rc; // current value holder
    int h, l;  // high and low bit numbers
    int hostl; // low bit of host
    rval mask; // bit mask
#ifdef VGEN
    std::string name;
    std::string orname;
    std::string lb, rb; // to distinguish between expression and variable
    std::string obname;
    std::string catname;
#endif
    Signal* host; // this Signal is a portion of the host
    Signal *ca1;
    Signal *ca2; // arguments of the comma operator
    int pedge, nedge, change;
    Signal* source; // pointer to source object
    Signal* outhost;
    Signal* outreg;
    int alwaysn;
    int inited;
    int printable;
    int mode; // none, reg, wire, input, output, inout
};


class parameter : public Signal
{
public:
    parameter (const char* rname, Signal arg);
    operator int(){return (unsigned int)r;};
protected:
    void init (int, int, const char*);
    void operator= (Signal arg);
};



class memory
{
public: 
    memory (){r = nullptr;};
    ~memory ();
    void reg (int, int, int, int, const char*);
    void reg (int nup, int ndown, const char* rname) {reg (0, 0, nup, ndown, rname);};
#ifdef VGEN
    Signal operator[] (Signal);
#else
    Signal& operator[] (Signal);
#endif

protected:
#ifdef VGEN
    std::string name;
#endif
    Signal* r;
    int up, down;

};

class module
{
public:
    module ();
    virtual ~module ();
    void create();
    void vendmodule();
    void vbeginmodule();

    virtual void operator()(){};
    
    void init (const char*, const char*);
    void init (const char*, const char*, module* fixt);
    void init (const char*, const char*, int);
    Signal posedge (Signal);
    Signal negedge (Signal);
    void pushswitch (Signal arg){switcharg[switchn] = arg; switchn++;};
    Signal getswitch (){return switcharg[switchn - 1];};
    void popswitch () {switchn--;}
    Signal* AddOutReg(Signal arg);
    Signal ifelse(Signal, Signal, Signal);
    void setchange(int c){change = c;}
    int getchange(){return change;}
#ifdef VGEN
    void PrintHeader();
#endif
protected:
#ifdef VGEN
    std::string name;
    std::streambuf *outbuf;
    std::ofstream vfile;
#endif
    std::string instname;
    int OuterIndPos;
    Signal switcharg[10];
    int switchn;
    int oldenmarg;
    Signal* outreg[1000];
    int outregn;
    void (*runperiod)();
    module* tfixt;
    int change;
    int itern; // number of iterations, for diagnostics
    rval passn; // number of pass

};


class function : public module
{
public:
    function(){};
    void init (int, int, const char*);
    void vendfunction();
    void vbeginfunction();
    void makemask(int hpar, int lpar);
protected:
#ifdef VGEN
    string retname;
#endif
    int h, l;
    rval mask;
    int OldChange;
    Signal result;
};
  
#define MAXSTIM 10000

class globcontrol
{
public:
    globcontrol();
#ifdef VGEN
    void AddParameter(string ln) {pars[npar] = ln; npar++;};
    void AddDeclarator(string ln){decls[ndecl] = ln; ndecl++;};
    void AddComment(string ln){ln += "\n"; decls[ndecl] = ln; ndecl++;};
    void AddIO(string ln);
    void Print ();
    string& PrintIO(bool col);
    void Indent(){indpos++; PrepMargin();};
    void Outdent(){indpos--; PrepMargin();};
    string& getmargin(){int t = nomargin; nomargin = 0; return (t) ? zeromargin : margin;};
    int getpos(){return indpos;};
    void setpos(int pos){indpos = pos; PrepMargin();};
    void setprintassign(int y){pa = y;};
    int  printassign(){return pa;};
    void enablemargin (int i){nomargin = !i;};
    int  getenablemargin (){return !nomargin;};
    void setFileOpen(int fo){VFileOpen = fo;};
    int  getFileOpen(){return VFileOpen;};
#endif
    void alwaysstart() {alwayscnt = 0; alwaysn++; if (alwaysn == 0 || alwaysn == -1) alwaysn = 1;}; 
    void alwayspush() {if (alwayscnt >= 0) alwayscnt++;};
    void alwayspop()  {if (alwayscnt >  0) alwayscnt--; if (alwayscnt == 0) alwayscnt = -1;};
    int  alwaysget() {return (alwayscnt > 0);};
    int  getalwaysn() {return (alwayscnt > 0) ? alwaysn : (-1);};

    void setchange(int i);
    int  getchange(){return change;};
    void setparent(module *rparent){parent = rparent;};
    module* getparent(){return parent;};
    void setfunction(int i){functiondecl = i;};
    int  getfunction(){int t = functiondecl; functiondecl = 0; return t;};
    int getce(){return ce;};
    int setce(int c){ce = c; return 1;};
    char* constant(int bits, char* val);
    char* constant(int bits, int val);
    void passn_inc(){passn++;};
    rval getpassn(){return passn;}

protected:
#ifdef VGEN
    string pars[MAXARG];
    int npar;

    string decls[MAXARG];
    int ndecl;

    string dios[MAXARG];
    int ndio;

    int indpos;
    string margin, zeromargin;
    void PrepMargin();
    int nomargin;

    int pa;
    string outln;
#endif
    int functiondecl;

    int alwayscnt;
    int alwaysn;

    int change;
    module* parent;

    int VFileOpen; // shows if the comments can be written into the file, or they need to be added to declarators
    int ce; // clock can be processed
    char constring[RVALS*32+32]; // string for text variables
    rval passn; // pass number

};

#ifdef VGEN
    #define beginsystem
    #define endsystem  exit(0);
#else
    #define beginsystem glc.setce(0); glc.passn_inc(); do { glc.setchange(0);
    #define endsystem   } while (glc.getchange() ? 1 : glc.getce() ? 0 : glc.setce(1));
#endif



#endif