Error reporting in arifmetic and Get<> functions.

Replace 0 on nullptr.

include/builtin.h

@@ -10,7 +10,7 @@ struct Valued
 template<>
 struct Valued<ObjectString>
 {
- double operator ()(const ObjectString* q, bool* isok) {double d=0; *isok=str2double(q->Value(),&d); return d;}
+ double operator ()(const ObjectString* q, bool* isok) {double d=0; if(!str2double(q->Value(),&d)) *isok=false; return d;}
 };
 
 template<class O>
@@ -22,7 +22,7 @@ struct Valuei
 template<>
 struct Valuei<ObjectString>
 {
- int64_t operator ()(const ObjectString* q, bool* isok) {int64_t i=0; *isok=str2int(q->Value(),&i); return i;}
+ int64_t operator ()(const ObjectString* q, bool* isok) {int64_t i=0; if(!str2int(q->Value(),&i)) *isok=false; return i;}
 };
 
 
@@ -37,36 +37,52 @@ template<class T> class OpPos {public: static T V(T a) {return +a;}};
 template<template<typename> class Op, bool intArifm=true>
 ObjectBase* Arifm2(const ObjectList* input)
 {
- if(input->Size()!=2) return 0;
+ if(input->Size()!=2) return new ObjectError("Arifmetic binary operator","incorrect number of arguments");
  const ObjectBase *arg1=input->At(0),*arg2=input->At(1);
  OBTypeM<Valuei,ObjectInt,ObjectString> i1(arg1), i2(arg2);
  OBTypeM<Valued,ObjectReal,ObjectInt,ObjectString> r1(arg1), r2(arg2);
- bool isok;
+ bool isok1=true, isok2=true;
 
  // Integer arifmetic
- isok=true;
  if(i1 && i2 && intArifm)
  {
-  int64_t v1=i1(&isok),v2=i2(&isok);
-  if(isok) return new ObjectInt(Op<int64_t>::V(v1,v2));
+  int64_t v1=i1(&isok1),v2=i2(&isok2);
+  if(isok1 && isok2) return new ObjectInt(Op<int64_t>::V(v1,v2));
  }
 
+ isok1=isok2=true;
  // Real arifmetic
- isok=true;
  if(r1 && r2)
  {
-  double v1=r1(&isok),v2=r2(&isok);
-  if(isok) return new ObjectReal(Op<double>::V(v1,v2));
+  double v1=r1(&isok1),v2=r2(&isok2);
+  if(isok1 && isok2) return new ObjectReal(Op<double>::V(v1,v2));
+ }
+
+ // Analyze error
+ // Check first argument
+ switch(r1.Error())
+ {
+  case(OBTypeErr::OK): if(!isok1) return new ObjectError("Arifmetic binary operator","failed conversion of first argument to double"); else break;
+  case(OBTypeErr::NULLPTR):       return new ObjectError("Arifmetic binary operator","first argument is nullptr"); // Impossible case
+  case(OBTypeErr::TYPEMISMATCH):  return new ObjectError("Arifmetic binary operator","first argument has incorrect type");
  }
 
- return 0;
+ // Firs argument is ok, check second
+ switch(r2.Error())
+ {
+  case(OBTypeErr::OK): if(!isok2) return new ObjectError("Arifmetic binary operator","failed conversion of second argument to double"); else break;
+  case(OBTypeErr::NULLPTR):       return new ObjectError("Arifmetic binary operator","second argument is nullptr"); // Impossible case
+  case(OBTypeErr::TYPEMISMATCH):  return new ObjectError("Arifmetic binary operator","second argument has incorrect type");
+ }
+
+ return new ObjectError("Arifmetic binary operator","unknown error"); // Impossible case
 }
 
 
 template<template<typename> class Op, bool intArifm=true>
 ObjectBase* Arifm1(const ObjectList* input)
 {
- if(input->Size()!=1) return 0;
+ if(input->Size()!=1) return new ObjectError("Arifmetic unary operator","incorrect number of arguments");
  const ObjectBase *arg=input->At(0);
  OBTypeM<Valuei,ObjectInt,ObjectString> i(arg);
  OBTypeM<Valued,ObjectReal,ObjectString> r(arg);
@@ -88,5 +104,13 @@ ObjectBase* Arifm1(const ObjectList* input)
   if(isok) return new ObjectReal(Op<double>::V(v));
  }
 
- return 0;
+ // Analyze error
+ switch(r.Error())
+ {
+  case(OBTypeErr::OK): if(!isok) return new ObjectError("Arifmetic unary operator","failed conversion of argument to double"); else break;
+  case(OBTypeErr::NULLPTR):      return new ObjectError("Arifmetic unary operator","argument is nullptr"); // Impossible case
+  case(OBTypeErr::TYPEMISMATCH): return new ObjectError("Arifmetic unary operator","argument has incorrect type");
+ }
+
+ return new ObjectError("Arifmetic unary operator","unknown error"); // Impossible case
 }

include/common.h

@@ -39,7 +39,7 @@ class EXPORT ObjectBase
  protected:
  bool err;
  // No save by default
- virtual const int8_t* Blob(size_t* size) const { *size=0; return 0; }
+ virtual const int8_t* Blob(size_t* size) const { *size=0; return nullptr; }
  virtual void DeallocBlob(const int8_t* ptr) const {};
  ObjectBase():err(false) {}
  public:
@@ -57,6 +57,7 @@ class EXPORT ObjectBase
  virtual std::string Dump() const {return "%"+Type()+"%";}
 };
 
+enum class OBTypeErr {OK,NULLPTR,TYPEMISMATCH};
 
 // Template for checking and using ObjectBase derivative classes
 // Checking if arg is non-zero: if(OBType<Derived>(arg).Exist())
@@ -71,11 +72,12 @@ class OBType
  OBType() = delete;
  OBType(OBType&&) = delete;
  OBType(OBType&) = delete;
- OBType(const ObjectBase* arg):iszero(0==arg) {if(0==arg) p=0; else if(typeid(*arg)==typeid(O)) p=dynamic_cast<const O*>(arg); else p=0;}
+ OBType(const ObjectBase* arg):iszero(nullptr==arg) {if(nullptr==arg) p=nullptr; else if(typeid(*arg)==typeid(O)) p=dynamic_cast<const O*>(arg); else p=nullptr;}
  const O* operator->() const {return p;}
- operator bool() const {return 0!=p;}
+ operator bool() const {return nullptr!=p;}
  operator const O*() const {return p;}
  bool Exist() const {return !iszero;}
+ OBTypeErr Error() const {if(iszero) return OBTypeErr::NULLPTR; else if(nullptr==p) return OBTypeErr::TYPEMISMATCH; else return OBTypeErr::OK;}
 };
 
 
@@ -110,7 +112,7 @@ class OBTypeM<Func,O1,O...>: public OBTypeM<Func,O...>
   else return OBTypeM<Func,O...>::template F<Res,Args...>(args...);
  }
  public:
- OBTypeM(const ObjectBase* arg):OBTypeM<Func,O...>(arg) {if(0==arg) right=false; else right=(typeid(*arg)==typeid(O1));}
+ OBTypeM(const ObjectBase* arg):OBTypeM<Func,O...>(arg) {if(nullptr==arg) right=false; else right=(typeid(*arg)==typeid(O1));}
  operator bool() const {return right || OBTypeM<Func,O...>::operator bool();}
  template<class Res, class... Args>
  bool Apply(Res& res, Args... args) const
@@ -127,6 +129,7 @@ class OBTypeM<Func,O1,O...>: public OBTypeM<Func,O...>
   else return OBTypeM<Func,O...>::template F<T,Args...>(args...);
  }
  bool Exist() const {return OBTypeM<Func,O...>::Exist();}
+ OBTypeErr Error() const {if(!Exist()) return OBTypeErr::NULLPTR; else if(!operator bool()) return OBTypeErr::TYPEMISMATCH; else return OBTypeErr::OK;}
 };
 
 // Partial instantiation of the bottom of recursion
@@ -147,7 +150,7 @@ class OBTypeM<Func>
  void operator ()(Args... args) const {}
  template<class Res, class... Args>
  Res F(Args... args) const {return Res();}
- bool Exist() const {return 0!=p;}
+ bool Exist() const {return nullptr!=p;}
 };
 
 
@@ -261,17 +264,17 @@ public:
  std::string Dump() const override { return Name()+"="+val->Dump(); }
 
  // Own functions
- bool Exist() const {return 0!=val.get();}
+ bool Exist() const {return nullptr!=val.get();}
  ObjectBase* Get(const std::string& gname) const
  {
   if(gname==name) return val->Copy();
-  else return 0;
+  else return new ObjectError("ObjectPair Get","pair has name "+name+" not "+gname);
  }
  // This function is same as Get but return pointer on constant object
  const ObjectBase* Find(const std::string& gname) const
  {
   if(gname==name) return val.get();
-  else return 0;
+  else return nullptr;
  }
  std::string Name() const {return name;}
  void SetPair(const std::string& n, ObjectBase* v) {if(!Exist()) {name=n; val.reset(v);}}
@@ -321,7 +324,7 @@ public:
  ObjectBase* Get(const std::string& gname) const
  {
   const ObjectBase* p=Find(gname);
-  return (0==p)?0:p->Copy();
+  return (nullptr==p)?new ObjectError("ObjectList Get","name "+gname+" not found in list"):p->Copy();
  }
  // This function is same as Get but return pointer on constant object
  const ObjectBase* Find(const std::string& gname) const
@@ -329,14 +332,14 @@ public:
   const ObjectBase* p;
   for(auto& i: *vals)
   {
-   p=0;
+   p=nullptr;
    OBType<ObjectPair> pair(i);
    OBType<ObjectList> list(i);
    if(pair) p=pair->Find(gname);
    else if(list) p=list->Find(gname);
-   if(0!=p) return p;
+   if(nullptr!=p) return p;
   }
-  return 0;
+  return nullptr;
  }
  ListValues::size_type Size() const {return vals->size();}
  ObjectList* PushBack(ObjectBase* p) {vals->push_back(p); return this;}
@@ -354,10 +357,11 @@ EXPORT int LoadModule(const std::string& name, const void* p, const std::string&
 template<class T>
 ObjectBase* Get(const ObjectList* input)
 {
- if(input->Size()!=2) return 0;
+ if(input->Size()!=2) return new ObjectError("GET","incorrect number of arguments");
  OBType<T> ob(input->At(0));
  OBType<ObjectString> name(input->At(1));
- if(!(ob && name)) return 0;
+ if(!name) return new ObjectError("GET","second argument is not ObjectString");
+ if(!ob) return new ObjectError("GET","incorrect type of first argument");
 
  return ob->Get(name->Value());
 }

src/deptree.cpp

@@ -281,14 +281,14 @@ void* TreeEvaluateM(void* arg)
   // Begin critical section (access to root)
   pthread_mutex_lock(&p->root_mtx);
   // Check, if all done, or error happens?
-  if(0==p->root->childrens.size() || 0!=p->exitcode) {pthread_mutex_unlock(&p->root_mtx); return 0;}
+  if(0==p->root->childrens.size() || 0!=p->exitcode) {pthread_mutex_unlock(&p->root_mtx); return nullptr;}
   // End critical section
   pthread_mutex_unlock(&p->root_mtx);
 
   // Begin critical section (access to leafs)
   pthread_mutex_lock(&p->leaf_mtx);
   // Check, if some work available?
-  if(0==p->leafs.size()) {pthread_mutex_unlock(&p->leaf_mtx); nanosleep(&skip,0); continue;}
+  if(0==p->leafs.size()) {pthread_mutex_unlock(&p->leaf_mtx); nanosleep(&skip,nullptr); continue;}
   // Select working node
   leaf=*(p->leafs.begin());
   // and remove its from list
@@ -307,12 +307,12 @@ void* TreeEvaluateM(void* arg)
     COUT(ERROR)<<" in instruction save at line "<<loc.first_line<<", position "<<loc.first_column<<std::endl;
     for(const auto& inc: loc.incstack) COUT(ERROR)<<"   included from "<<inc.filename<<" at line "<<inc.line<<", position "<<inc.column<<std::endl;
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    if(!Save(ol.get()))
    {
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    // This leaf can have only one parent - root
    // Begin critical section (access to root)
@@ -333,12 +333,12 @@ void* TreeEvaluateM(void* arg)
     COUT(ERROR)<<" in instruction print at line "<<loc.first_line<<", position "<<loc.first_column<<std::endl;
     for(const auto& inc: loc.incstack) COUT(ERROR)<<"   included from "<<inc.filename<<" at line "<<inc.line<<", position "<<inc.column<<std::endl;
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    if(!Print(ol.get()))
    {
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
 
    // Begin critical section (access to root)
@@ -363,7 +363,7 @@ void* TreeEvaluateM(void* arg)
     COUT(ERROR)<<" in definition of variable "<<leaf->name<<" at line "<<loc.first_line<<", position "<<loc.first_column<<std::endl;
     for(const auto& inc: loc.incstack) COUT(ERROR)<<"   included from "<<inc.filename<<" at line "<<inc.line<<", position "<<inc.column<<std::endl;
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
 
    // Begin critical section (access to tree structure)
@@ -390,7 +390,7 @@ void* TreeEvaluateM(void* arg)
   leaf->parents.clear();
   delete leaf;
  }
- return 0;
+ return nullptr;
 }
 
 
@@ -419,13 +419,13 @@ void* TreeEvaluate(void* arg)
     COUT(ERROR)<<" in instruction save at line "<<loc.first_line<<", position "<<loc.first_column<<std::endl;
     for(const auto& inc: loc.incstack) COUT(ERROR)<<"   included from "<<inc.filename<<" at line "<<inc.line<<", position "<<inc.column<<std::endl;
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    // eob is evaluated object
    if(!Save(ol.get()))
    {
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    // This leaf can have only one parent - root
    (*leaf->parents.begin())->childrens.erase(leaf);
@@ -442,12 +442,12 @@ void* TreeEvaluate(void* arg)
     COUT(ERROR)<<" in instruction print at line "<<loc.first_line<<", position "<<loc.first_column<<std::endl;
     for(const auto& inc: loc.incstack) COUT(ERROR)<<"   included from "<<inc.filename<<" at line "<<inc.line<<", position "<<inc.column<<std::endl;
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    if(!Print(ol.get()))
    {
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
    // This leaf can have only one parent - root
    (*leaf->parents.begin())->childrens.erase(leaf);
@@ -466,7 +466,7 @@ void* TreeEvaluate(void* arg)
     COUT(ERROR)<<" in definition of variable "<<leaf->name<<" at line "<<loc.first_line<<", position "<<loc.first_column<<std::endl;
     for(const auto& inc: loc.incstack) COUT(ERROR)<<"   included from "<<inc.filename<<" at line "<<inc.line<<", position "<<inc.column<<std::endl;
     p->exitcode=1;
-    return 0;
+    return nullptr;
    }
 
    for(auto& i:leaf->parents)
@@ -483,7 +483,7 @@ void* TreeEvaluate(void* arg)
   leaf->parents.clear();
   delete leaf;
  }
- return 0;
+ return nullptr;
 }
 
 
@@ -499,16 +499,16 @@ int DepTree::EvaluateTree(unsigned int nthreads)
  {
   pthread_t* threads=new pthread_t[nthreads-1];
   p.root=this;
-  pthread_mutex_init(&p.leaf_mtx,0);
-  pthread_mutex_init(&p.root_mtx,0);
-  pthread_mutex_init(&p.vars_mtx,0);
-  pthread_mutex_init(&p.prsv_mtx,0);
-  pthread_mutex_init(&p.tree_mtx,0);
+  pthread_mutex_init(&p.leaf_mtx,nullptr);
+  pthread_mutex_init(&p.root_mtx,nullptr);
+  pthread_mutex_init(&p.vars_mtx,nullptr);
+  pthread_mutex_init(&p.prsv_mtx,nullptr);
+  pthread_mutex_init(&p.tree_mtx,nullptr);
   while(0!=p.root->parents.size()) p.root=*(p.root->parents.begin());
 
-  for(unsigned int i=0;i<nthreads-1;++i) pthread_create(threads+i,0,&TreeEvaluateM,&p);
+  for(unsigned int i=0;i<nthreads-1;++i) pthread_create(threads+i,nullptr,&TreeEvaluateM,&p);
   TreeEvaluateM(&p);
-  for(unsigned int i=0;i<nthreads-1;++i) pthread_join(threads[i],0);
+  for(unsigned int i=0;i<nthreads-1;++i) pthread_join(threads[i],nullptr);
   delete[] threads;
   pthread_mutex_destroy(&p.leaf_mtx);
   pthread_mutex_destroy(&p.root_mtx);

src/globals.cpp

@@ -6,24 +6,9 @@ G_funcsType G_funcs;
 // Loaded modules
 G_libsType G_libs;
 
-/*
-// Variables definitions
-G_VarType G_Vars;
-
-// List of objects to save
-G_ExecType G_ToSave;
-
-// List of objects to print
-G_ExecType G_ToPrint;
-*/
-
 void ClearGlobals()
 {
  for(auto& it:G_libs) dlclose(it);
-
- //G_Vars.clear();
- //G_ToPrint.clear();
- //G_ToSave.clear();
 }
 
 
@@ -47,20 +32,20 @@ int LoadModule(const std::string& name, const void* p, const std::string& modnam
  initname+="_module_init";
 
  // Check if module is statically linked or already loaded: dlopen'ed the main program
- handle=dlopen(0,RTLD_LAZY|RTLD_GLOBAL);
- if(0==handle)
+ handle=dlopen(nullptr,RTLD_LAZY|RTLD_GLOBAL);
+ if(nullptr==handle)
  {
   COUT(ERROR)<<std::endl<<"Something wrong: can't dlopen the main program"<<std::endl;
   return 1;
  }
  initfunc=dlsym(handle,initname.c_str());
 
- if(0==initfunc) // We not find it
+ if(nullptr==initfunc) // We not find it
  {
   if('/'==name[0]) // Absolute path
   {
    handle=dlopen(name.c_str(),RTLD_LAZY|RTLD_GLOBAL);
-   if(0==handle) handle=dlopen((name+".so").c_str(),RTLD_LAZY|RTLD_GLOBAL);
+   if(nullptr==handle) handle=dlopen((name+".so").c_str(),RTLD_LAZY|RTLD_GLOBAL);
   }
   else // Relative path
   {
@@ -72,13 +57,13 @@ int LoadModule(const std::string& name, const void* p, const std::string& modnam
     epos=spath.find(':',bpos);
     curpath=spath.substr(bpos,(std::string::npos==epos)?epos:(epos-bpos));
     handle=dlopen((curpath+name).c_str(),RTLD_LAZY|RTLD_GLOBAL);
-    if(0!=handle) break;
+    if(nullptr!=handle) break;
     handle=dlopen((curpath+name+".so").c_str(),RTLD_LAZY|RTLD_GLOBAL);
-    if(0!=handle) break;
+    if(nullptr!=handle) break;
     bpos=epos+1;
    } while(std::string::npos!=epos);
   }
-  if(0==handle)
+  if(nullptr==handle)
   {
    COUT(ERROR)<<std::endl<<"Can't dlopen module "<<name<<std::endl;
    return 1;
@@ -87,7 +72,7 @@ int LoadModule(const std::string& name, const void* p, const std::string& modnam
   initfunc=dlsym(handle,initname.c_str());
  }
 
- if(0==initfunc)
+ if(nullptr==initfunc)
  {
   COUT(ERROR)<<std::endl<<"Can't find initialising function "<<initname<<" in module "<<name<<std::endl;
   return 1;

src/init.cpp

@@ -25,7 +25,7 @@ int ParseConfigFile(const char* config, ExecType& tosave, ExecType& toprint, Var
  int ret;
 
  conffd=fopen(config,"r");
- if(conffd==0)
+ if(nullptr==conffd)
  {
   COUT(ERROR)<<"Can't open file "<<config<<std::endl;
   return 1;

src/main.cpp

@@ -22,11 +22,11 @@ int main(int argc, char** argv)
  options.threads=1;
  options.help=options.dump=false;
  options.dl=NORMAL;
- options.config=0;
+ options.config=nullptr;
 
  // Parse options
  ret=ParseOptions(argc,argv,options);
- if(ret!=0 || options.config==0) {usage(argv[0]); return 1;}
+ if(ret!=0 || nullptr==options.config) {usage(argv[0]); return 1;}
  if(options.help) {usage(argv[0]); return 0;}
 
  SetDebugLevel(options.dl);

src/object.cpp

@@ -213,13 +213,13 @@ bool ObjectBase::Save(const char* fname) const
 
  fd=fopen(fname,"w");
  serrno=errno;
- if(0==fd)
+ if(nullptr==fd)
  {
   COUT(ERROR)<<"Can't open file "<<fname<<" for writing: "<<strerror(serrno)<<std::endl;
   return false;
  }
  dptr=Blob(&size);
- if(0==dptr)
+ if(nullptr==dptr)
  {
   COUT(ERROR)<<"Can't get blob for writing to "<<fname<<std::endl;
   fclose(fd);