source: cpp/gdk/extvalue.cpp @ 107

// This file is a part of the Framsticks GDK library.
// Copyright (C) 2002-2011  Szymon Ulatowski.  See LICENSE.txt for details.
// Refer to http://www.framsticks.com/ for further information.

#include "extvalue.h"
#include "param.h"
#include "sstringutils.h"
#include <math.h>
#include <ctype.h>
#include "collectionobj.h"
#include "3dobject.h"

SString ExtObject::toString() const
{
if (isEmpty()) return SString("<empty object>");
Param tmp_param;
ParamInterface *p=getParamInterface(tmp_param);
int tostr=p->findId("toString");
if (tostr>=0)
        {
        return SString(p->getString(tostr));
        }
else
        {
        SString tmp("<");
        tmp+=p->getName();
        sprintf(tmp.directAppend(30)," object at %p>",
                (object?object:paraminterface));
        tmp.endAppend();
        return tmp;
        }
}

ThreadSingleton<ExtObject::Serialization> ExtObject::serialization;

void ExtObject::Serialization::begin()
{
if (level==0)
        refs.clear();
level++;
}

int ExtObject::Serialization::add(const ExtObject &o)
{
if (o.isEmpty()) return -1;
for(int i=0;i<refs.size();i++)
        {
        ExtObject& r=refs[i];
        if (r==o) return i;
        }
refs.push_back(o);
return -1;
}

void ExtObject::Serialization::replace(const ExtObject& o,const ExtObject& other)
{
if (o.isEmpty()) return;
for(int i=0;i<refs.size();i++)
        {
        ExtObject& r=refs[i];
        if (r==o)
                {
                r=other;
                return;
                }
        }
}

void ExtObject::Serialization::remove(const ExtObject& o)
{
if (o.isEmpty()) return;
for(int i=0;i<refs.size();i++)
        {
        ExtObject& r=refs[i];
        if (o==r) refs.erase(refs.begin()+i);
        }
}

const ExtObject* ExtObject::Serialization::get(int ref)
{
if (ref<0) return NULL;
if (ref>=refs.size()) return NULL;
return &refs[ref];
}

void ExtObject::Serialization::end()
{
level--;
if (level==0)
        refs.clear();
}

SString ExtObject::serialize_inner() const
{
int ref=serialization.getref().add(*this);
if (ref>=0)
        {
        SString ret;
        sprintf(ret.directAppend(20),"^%d",ref);ret.endAppend();
        return ret;
        }

if (isEmpty()) return SString();
VectorObject *vec=VectorObject::fromObject(*this);
if (vec)
        return vec->serialize();
DictionaryObject *dic=DictionaryObject::fromObject(*this);
if (dic)
        return dic->serialize();
Param tmp_param;
ParamInterface *p=getParamInterface(tmp_param);
int m=p->findId("toVector");
if (m<0) 
        m=p->findId("toDictionary");
if (m>=0)
        {
        ExtObject o(p->getObject(m));
        SString ret=SString(interfaceName())+o.serialize();
        return ret;
        }
m=p->findId("toString");
if (m>=0)
        {
        SString str=p->getString(m);
        sstringQuote(str);
        SString ret=SString(interfaceName())+"\""+str+"\"";
        return ret;
        }

SString ret=interfaceName();
sprintf(ret.directAppend(30),"<%p>",object?object:paraminterface);ret.endAppend();
return ret;
}

SString ExtObject::serialize() const
{
serialization.getref().begin();
SString ret=serialize_inner();
serialization.getref().end();
return ret;
}

///////////////////////////////////////

void ExtValue::set(const ExtValue& src)
{
switch(src.type)
        {
        case TString: sets(src.sdata()); break;
        case TInt: seti(src.idata()); break;
        case TDouble: setd(src.ddata()); break;
        case TObj: seto(src.odata()); break;
        case TInvalid: type=TInvalid; break;
        }
}

void ExtValue::setEmpty()
{
switch(type)
        {
#ifdef EXTVALUEUNION
        case TString: sdata().~SString(); break;
        case TObj: odata().~ExtObject(); break;
#else
        case TString: delete s; break;
        case TObj: delete o; break;
#endif
        }
type=TUnknown;
}

static long longsign(long x)
{
if (x<0) return -1;
if (x>0) return 1;
return 0;
}

long ExtValue::compare(const ExtValue& src) const
{
if (type==TUnknown)
        {
        if (src.type==TDouble)
                return (src.getDouble()!=0.0);
        if (src.type==TString)
                return 1;
        return src.getInt()?1:0;
        }
else if (src.type==TUnknown)
        {
        if (type==TDouble)
                return (getDouble()!=0.0);
        if (type==TString)
                return 1;
        return getInt()?1:0;
        }
switch(type)
        {
        case TInt:
        {
        long t=src.getInt();
        if (idata()>0)
                {if (t>0) return longsign(idata()-t); else return +1;}
        else
                {if (t<=0) return longsign(idata()-t); else return -1;}
        }
        case TDouble:
                {
                double t=ddata()-src.getDouble();
                if (t<0) return -1;
                else if (t>0) return 1;
                return 0;
                }
        case TString:
        {
        SString t=src.getString();
        SString& t2=sdata();
        const char* s1=(const char*)t2;
        const char* s2=(const char*)t;
        return longsign(strcmp(s1,s2));
        }
        case TObj: 
        {
        if (src.type==TObj)
                return !(odata()==src.odata());
        return 1;
        }
        }
return 1;
}

int ExtValue::operator==(const ExtValue& src) const
{
if (type!=src.type) return 0;
switch(type)
        {
        case TInt: return idata()==src.idata();
        case TDouble: return ddata()==src.ddata();
        case TString: return sdata()==src.sdata();
        case TObj: return odata()==src.odata();
        }
return 1;
}

void ExtValue::operator+=(const ExtValue& src)
{
switch(type)
        {
        case TInt: idata()+=src.getInt(); break;
        case TDouble: ddata()+=src.getDouble(); break;
        case TString: sdata()+=src.getString(); break;
        }
}

void ExtValue::operator-=(const ExtValue& src)
{
switch(type)
        {
        case TInt: idata()-=src.getInt(); break;
        case TDouble: ddata()-=src.getDouble(); break;
        }
}

void ExtValue::operator*=(const ExtValue& src)
{
switch(type)
        {
        case TInt: idata()*=src.getInt(); break;
        case TDouble: ddata()*=src.getDouble(); break;
        }
}

#include "framsg.h"
/*#include "fpu_control.h"
#include <signal.h>

static int fpuexception;
void mathhandler(int sig)
{
printf("fpu exception!\n");
fpuexception=1;
signal(SIGFPE,SIG_IGN);
} */

void ExtValue::operator/=(const ExtValue& src)
{
switch(type)
        {
        case TInt:
        { int a=src.getInt();
//              idata()/=src.getInt();
        if (a) idata()/=a;
        else FMprintf("ExtValue","divide",FMLV_ERROR,"%s/0",(const char*)getString());
        }
                break;

        case TDouble:
// ugly ;-(
#ifdef FPU_THROWS_EXCEPTIONS
                try
                        {
                        ddata()/=src.getDouble();
                        }
                catch(...)
                        {
                        FMprintf("ExtValue","divide",FMLV_ERROR,"%s/0.0",(const char*)getString());
                        }
#else
                {
                double d=ddata();
                d/=src.getDouble();
#ifdef IPHONE
        if (!isinf(d))
#else
                if (finite(d))
#endif
                        ddata()=d;
                else
                        FMprintf("ExtValue","divide",FMLV_ERROR,"%s/0.0",(const char*)getString());
                }
#endif
                break;
        }
}

void ExtValue::operator%=(const ExtValue& src)
{
switch(type)
        {
        case TInt: idata()=idata()%src.getInt(); break;
        case TDouble: ddata()=fmod(ddata(),src.getDouble()); break;
        }
}

long ExtValue::getInt() const
{
switch(type)
        {
        case TInt: return idata();
        case TDouble: return (int)ddata();
        case TString:
        {
        const char* s=(const char*)sdata();
        if ((s[0]=='0')&&(s[1]=='x'))
                {
                long val;
                sscanf(s+2,"%lx",&val);
                return val;
                }
        else
                {
                if (strchr(s,'e')||(strchr(s,'E')))
                        return atof(s);
                else
                        return atol(s);
                }
        }
        case TObj: return (long)odata().param;
        }
return 0;
}
double ExtValue::getDouble() const
{
switch(type)
        {
        case TDouble: return ddata();
        case TInt: return (double)idata();
        case TString:
        {
        const char* s=(const char*)sdata();
        if ((s[0]=='0')&&(s[1]=='x'))
                {
                long val;
                sscanf(s+2,"%lx",&val);
                return val;
                }
        else
                return atof(s);
        }
        case TObj: return (double)(long)odata().param;
        }
return 0.0;
}
SString ExtValue::getString() const
{
switch(type)
        {
        case TString: return sdata();
        case TInt:
                {
                SString tmp;
                sprintf(tmp.directAppend(20),"%d",idata());
                tmp.endAppend();
                return tmp;
                }
        case TDouble:
                {
                SString tmp;
                sprintf(tmp.directAppend(20),"%.15g",ddata());
                tmp.endAppend();
                if ((!strchr(tmp,'.'))&&(!strchr(tmp,'e'))) tmp+=".0";
                return tmp;
                }
        case TObj:
                return odata().toString();
        case TInvalid:
                return SString("undefined");
        default:
                return SString("null");
        }
}

SString ExtValue::serialize() const
{
switch(type)
        {
        case TString:
                {
                SString q=sdata();
                sstringQuote(q);
                return SString("\"")+q+SString("\"");
                }
        case TInt:
                {
                SString tmp;
                sprintf(tmp.directAppend(20),"%d",idata());
                tmp.endAppend();
                return tmp;
                }
        case TDouble:
                {
                SString tmp;
                sprintf(tmp.directAppend(20),"%.15g",ddata());
                tmp.endAppend();
                if ((!strchr(tmp,'.'))&&(!strchr(tmp,'e'))) tmp+=".0";
                return tmp;
                }
        case TObj:
                return odata().serialize();
        case TInvalid:
                return SString("undefined");
        default:
                return SString("null");
        }
}

//returns the first character after the parsed number or NULL if not a number
const char* ExtValue::parseNumber(const char* in)
{
if (isdigit(*in)||((*in=='-')&&(isdigit(in[1]))))
        {
        const char* p=in;
        if (*p=='-') p++;
        while(isdigit(*p)) p++;
        bool fp=false;
        if ((*p=='.') && isdigit(p[1]))
                {
                p++;
                while(isdigit(*p)) p++;
                fp=true;
                }
        if (((*p=='e')||(*p=='E')) && (isdigit(p[1]) || (((p[1]=='-') || (p[1]=='+')) && isdigit(p[2]))))
                {
                p++;
                if ((*p=='-')||(*p=='+')) p++;
                while(isdigit(*p)) p++;
                fp=true;
                }

        if (fp)
                {
                setDouble(atof(in));
                return p;
                }
        else
                {
                setInt(atol(in));
                return p;
                }
        }
return NULL;
}

PtrListTempl<ParamInterface*> ExtValue::deserializable_classes;

void ExtValue::initDeserializableClasses()
{
deserializable_classes+=&Pt3D_Ext::getStaticParam();
deserializable_classes+=&Orient_Ext::getStaticParam();
}

ParamInterface *ExtValue::findDeserializableClass(const char* name)
{
FOREACH(ParamInterface*,cls,deserializable_classes)
        if (!strcmp(cls->getName(),name))
                return cls;
return NULL;
}

static const char* skipWord(const char* in)
{
while(isalpha(*in))
        in++;
return in;
}

//returns the first character after the parsed portion or NULL if invalid format
const char* ExtValue::deserialize_inner(const char* in)
{
const char* ret=parseNumber(in);
if (ret)
        return ret;
else if (*in=='\"')
        {
        ret=skipQuoteString(in+1,NULL);
        SString s(in+1,ret-(in+1));
        sstringUnquote(s);
        setString(s);
        if (*ret=='\"')
                return ret+1;
        else
                return NULL;
        }
else if (*in=='[')
        {
        VectorObject *vec=new VectorObject;
        ExtObject o(&VectorObject::par,vec);
        ExtObject::serialization.getref().add(o);
        const char* p=in+1;
        ExtValue tmp;
        while(*p)
                {
                if (*p==']') {p++;break;}
                ret=tmp.deserialize(p);
                if (ret)
                        {
                        vec->data+=new ExtValue(tmp);
                        p=ret;
                        if (*p==',') p++;
                        }
                else
                        {
                        p=NULL;
                        break;
                        }
                }
        setObject(o);
        return p;
        }
else if (*in=='{')
        {
        DictionaryObject *dic=new DictionaryObject;
        ExtObject o(&DictionaryObject::par,dic);
        ExtObject::serialization.getref().add(o);
        const char* p=in+1;
        ExtValue args[2]/*={value,key}*/, dummy_ret;
        while(*p)
                {
                if (*p=='}') {p++;break;}
                ret=args[1].deserialize(p);
                if ((!ret)||(args[1].getType()!=TString)) {p=NULL;break;}
                p=ret;
                if (*p!=':') {p=NULL;break;}
                p++;
                ret=args[0].deserialize(p);
                if (!ret) {p=NULL;break;}
                p=ret;
                dic->p_set(args,&dummy_ret);
                if (*p==',') p++;
                }
        setObject(o);
        return p;
        }
else if (!strncmp(in,"null",4))
        {
        setEmpty();
        return in+4;
        }
else if (!strncmp(in,"undefined",9))
        {
        setInvalid();
        return in+9;
        }
else if (*in=='<')
        { //unserializable object
        setInvalid();
        while(*in)
                if (*in=='>')
                        return in+1;
                else in++;
        return in;
        }
else if (*in=='^')
        {
        in++;
        ExtValue ref;
        ret=ref.parseNumber(in);
        if (ret && (ref.getType()==TInt))
                {
                const ExtObject* o=ExtObject::serialization.getref().get(ref.getInt());
                if (o)
                        {
                        setObject(*o);
                        return ret;
                        }
                }
        return NULL;
        }
else if ((ret=skipWord(in))&&(ret!=in))
        {
        SString clsname(in,ret-in);
        ExtValue tmp;
        ret=tmp.deserialize(ret);
        ParamInterface *cls=findDeserializableClass(clsname);
        if (cls && (tmp.getType()!=TUnknown) && (tmp.getType()!=TInvalid))
                {
                VectorObject *vec=VectorObject::fromObject(tmp.getObject());
                if (vec)
                        {
                        int m=cls->findId("newFromVector");
                        if (m>=0)
                                {
                                cls->call(m,&tmp,this);
                                ExtObject::serialization.getref().replace(tmp.getObject(),getObject());
                                return ret;
                                }
                        }
                DictionaryObject *dic=DictionaryObject::fromObject(tmp.getObject());
                if (dic)
                        {
                        int m=cls->findId("newFromDictionary");
                        if (m>=0)
                                {
                                cls->call(m,&tmp,this);
                                ExtObject::serialization.getref().replace(tmp.getObject(),getObject());
                                return ret;
                                }
                        }
                if (tmp.getType()==TString)
                        {
                        int m=cls->findId("newFromString");
                        if (m>=0)
                                {
                                cls->call(m,&tmp,this);
                                ExtObject::serialization.getref().replace(tmp.getObject(),getObject());
                                return ret;
                                }
                        }
                ExtObject::serialization.getref().remove(tmp.getObject());
                setEmpty();
                }
        FMprintf("ExtValue","deserialize",FMLV_WARN,"object of class \"%s\" could not be deserialized",(const char*)clsname);
        return ret;
        }
return NULL;
}

const char* ExtValue::deserialize(const char* in)
{
ExtObject::serialization.getref().begin();
const char* ret=deserialize_inner(in);
ExtObject::serialization.getref().end();
return ret;
}

ExtObject ExtValue::getObject() const
{
if (type==TObj) return odata();
return ExtObject();
}

ExtValue ExtValue::getExtType()
{
if (getType()!=TObj) return ExtValue((long)getType());
ExtObject& o=odata();
return ExtValue(SString(o.isEmpty()?"":o.interfaceName()));
}