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CableSwig.cxx

#include "CableSwig.h"

#include <ctype.h>

// include cable classes
#include "cableVersion.h"
#include "cableXMLSourceParser.h"
#include "cableSourceRepresentation.h"
#include "cableNamespace.h"
#include "cableVariable.h"
#include "cableTypedef.h"
#include "cableClass.h"
#include "cableEnumeration.h"
#include "cableType.h"
#include "cableClassType.h"
#include "cableFunction.h"
#include "cableMethod.h"
#include "cableFunctionType.h"
#include "cableEnumerationType.h"
#include "cableReferenceType.h"
#include "cablePointerType.h"
#include "cableSystemTools.h"
#include "cxxCvQualifiedType.h"
#include "cxxPointerType.h"
#include "cxxReferenceType.h"
#include "cxxFunctionType.h"
#include "cxxClassType.h"
#include <fstream>

List *Swig_overload_rank(Node *n);

// This is a copy of the file CableSwigModule.h
// Currently, it supports PERL, TCL, and PYTHON
// Do not edit here, edit CableSwigModule.h, and
// then re-create this string from that file.
const char* SwigInitMacrosString =
"/* --- DECLARE_MODULE_INIT and CALL_MODULE_INIT definitions */\n"
"#ifdef SWIGPERL\n"
"#define CS_MODULE_INIT_DEFINED 1\n"
"#ifndef PERL_OBJECT\n"
"#ifndef MULTIPLICITY\n"
"#define SWIG_INIT_ARGS CV* cv;\n"
"#define SWIG_INIT_CALL_ARGS cv\n"
"#else\n"
"#define SWIG_INIT_ARGS pTHXo_ CV* cv\n"
"#define SWIG_INIT_CALL_ARGS aTHXx_ cv\n"
"#endif\n"
"#else\n"
"#define SWIG_INIT_ARGS CV *cv, CPerlObj *\n"
"#define SWIG_INIT_CALL_ARGS aTHXx_ cv, 0\n"
"#endif\n"
"#define DECLARE_MODULE_INIT(name, Capitalname) \\\n"
"extern \"C\" int boot_##name( SWIG_INIT_ARGS );\n"
"\n"
"#define CALL_MODULE_INIT(name, Capitalname) \\\n"
"boot_##name( SWIG_INIT_CALL_ARGS );\n"
"#endif\n"
"\n"
"#ifdef SWIG_TCL_INT\n"
"#define CS_MODULE_INIT_DEFINED 1\n"
"#define DECLARE_MODULE_INIT(name, Capitalname) \\\n"
"extern \"C\" int Capitalname##_Init( Tcl_Interp* );\n"
"#define CALL_MODULE_INIT(name, Capitalname) \\\n"
"Capitalname##_Init( interp );\n"
"#endif\n"
"\n"
"#ifdef SWIGPYTHON\n"
"#define CS_MODULE_INIT_DEFINED 1\n"
"#define DECLARE_MODULE_INIT(name, Capitalname) \\\n"
"extern \"C\" int init_##name( );\n"
"#define CALL_MODULE_INIT(name, Capitalname) \\\n"
"init_##name( );\n"
"#endif\n"
"\n"
"#ifndef CS_MODULE_INIT_DEFINED\n"
"#define DECLARE_MODULE_INIT(name, Capitalname)\n"
"#define CALL_MODULE_INIT(name, Capitalname)\n"
"#endif\n"
"\n";



// copied from swig, with a modification
// that it does not look for = 0, but looks at
// the "abstract" attribute
static List *pure_abstract(Node *n)
{
  List *abs = 0;
  while (n)
    {
    if (Cmp(nodeType(n),"cdecl") == 0)
      {
      ::String *decl = Getattr(n,"decl");
      if (SwigType_isfunction(decl))
        {
        ::String *init = Getattr(n,"abstract");
        if (Cmp(init,"1") == 0)
          {
          if (!abs)
            {
            abs = NewList();
            }
          Append(abs,n);
          }
        }
      }
    else if (Cmp(nodeType(n),"destructor") == 0)
      {
      if (Cmp(Getattr(n,"abstract"),"1") == 0)
        {
        if (!abs)
          {
          abs = NewList();
          }
        Append(abs,n);
        }
      }
    n = nextSibling(n);
    }
  return abs;
}


// function to reduce all commas followed by spaces to just commas
void CableSwig::ReduceCommaSpace(std::string& source)
{
  const char *cs = ", ";
  std::string::size_type start = source.find(cs);
  if (start == std::string::npos)
    {
    return;
    }

  std::string rest;
  std::string::size_type cslen = strlen(cs);
  while (start != std::string::npos)
    {
    rest = source.substr(start + cslen);
    source = source.substr(0, start);
    source += ",";
    source += rest;
    // this is the only real difference with ReplaceString:
    // we restrict subsequent searches to begin at the replaced
    // ',' so that commas with multiple spaces are also neatly
    // reduced
    start = source.find(cs, start);
    }
}

// replace a substring in source
void CableSwig::ReplaceString(std::string& source,
                              const char* replace,
                              const char* with)
{
  // get out quick if string is not found
  std::string::size_type start = source.find(replace);
  if(start ==  std::string::npos)
    {
    return;
    }
  std::string rest;
  std::string::size_type lengthReplace = strlen(replace);
  std::string::size_type lengthWith = strlen(with);
  while(start != std::string::npos)
    {
    rest = source.substr(start+lengthReplace);
    source = source.substr(0, start);
    source += with;
    source += rest;
    start = source.find(replace, start + lengthWith );
    }
}

// return the class name unless it is a templated class,
// in which case you return the typedef for the class
std::string CableSwig::GetClassName(const cable::Class* c, const char* td)
{
  // if there is a typedef use that name
  if(td)
    {
    return std::string(td);
    }
  std::string name = c->GetName();
  // if not a template name or a typedef then return the name
  if(name.find('<') == name.npos)
    {
    return name;
    }
  else
    {
    return this->TemplateName(c->GetName());
    }
}


// convert to swig template names  <int> is <(int)>
std::string CableSwig::TemplateName(const char* s)
{
  std::string name = s;
  // change the name for any native strings to 
  // std::string, this is because itk.swg includes
  // std_string.i which always defines an std::string class
  // That class can then act as a native string in the wrapped
  // languages.
  if(m_NativeStringName.length() > 0 && name == m_NativeStringName)
    {
    name = "std::string";
    }
  ReplaceString(name, "<", "<(");
  ReplaceString(name, ">", ")>");
  ReplaceString(name, "> )", ">)");   
  // in order to following Swig convention, <int, 2> should be <int,2>
  // if this is not so, Swig and CableSwig type mangling yields different
  // results and ITK wrapped code created directly with Swig will not be
  // able to operate on CableSwig wrapped objects.
  ReduceCommaSpace(name);
  // Once again, gcc_xml returns "short unsigned int", Swig convention is
  // "unsigned short".  For the same reason as above, we convert to Swig
  // convention.  The other translations are for the same reason.
  ReplaceString(name, "short unsigned int", "unsigned short");
  ReplaceString(name, "long unsigned int", "unsigned long"); 

  return name;
}


// convert from cable to swig type, recursive function
std::string CableSwig::ToSwigType(cxx::CvQualifiedType const&  t)
{
  switch(t.GetRepresentationType())
    {
    case cxx::ArrayType_id:
      break;
    case cxx::ClassType_id:
      break;
    case cxx::EnumerationType_id:
      break;
    case cxx::PointerType_id:
      {
      cxx::PointerType const* p
        = cxx::PointerType::SafeDownCast(t.GetType());
      std::string n;
      if(t.IsConst())
        {
        n += "q(const).";
        }
      n += "p.";
      n += this->ToSwigType(p->GetPointedToType());
      return n;
      }
    break;
    case cxx::PointerToMemberType_id:
      break;
    case cxx::ReferenceType_id:
      {
      cxx::ReferenceType const* r
        = cxx::ReferenceType::SafeDownCast(t.GetType());
      std::string n = "r.";
      n += this->ToSwigType(r->GetReferencedType());
      return n;
      break;
      }

    case cxx::FundamentalType_id:
      break;
    case cxx::FunctionType_id:
      {

      cxx::FunctionType const* f
        = cxx::FunctionType::SafeDownCast(t.GetType());
      std::string n = "f(";
      cxx::CvQualifiedTypes const& args = f->GetArgumentTypes();
      cxx::CvQualifiedTypes::const_iterator i = args.begin();
      if(i != args.end())
        {
        n += this->ToSwigType(*i);
        for(++i; i != args.end(); ++i)
          {
          n += ",";
          n += this->ToSwigType(*i);
          }
        }
      n += ").";
      n += this->ToSwigType(f->GetReturnType());
      return n;
      break;
      }
    case cxx::Undefined_id:
      break;
    }
  std::string ret;
  if(t.IsConst())
    {
    ret = "q(const).";
    }
  ret += this->TemplateName(t.GetType()->Name().c_str());
  return ret;
}





// Create a swig method and add it to the swig class Node sc
// sc must be a swig class node that has already be created and
// the swig scope must be in that class when this is called.
void CableSwig::CreateSwigMethod(cable::Method* mth, Node* sc, std::string& cname,
                                 const char* access)
{
  m_CurrentFile = mth->GetFile();
  m_CurrentLine = mth->GetLine();
  cable::Function::FunctionIdType fid = mth->GetFunctionId();
  cable::FunctionType* ft = mth->GetFunctionType();
  Node* m;
  if(fid == cable::Function::ConverterId)
    {
    return;
    }
  const cable::ClassType* rtype = cable::ClassType::SafeDownCast(ft->GetReturns());
  if(rtype)
    {
    const cable::Class* c = rtype->GetClass();
    cable::Context* context = c->GetContext();
    // check to see if the return type is a nested class
    // since swig does not support nested classes, the
    // method is skipped
    if(context && cable::Class::SafeDownCast(context))
      {
      return;
      }
    }
  // do not wrap public destructors, as this
  // seems to confuse swig
  if(fid == cable::Function::DestructorId)
    {
    if(strcmp(access, "public") == 0)
      {
      return;
      }
    }

  if(fid == cable::Function::ConstructorId)
    {
    m = new_node("constructor");
    // for a constructor use the name of the class as the function name
    Setattr(m, "name", Getattr(sc, "name"));
    }
  else if(fid == cable::Function::DestructorId)
    {
    m = new_node("destructor");
    // for a constructor use the name of the class as the function name
    std::string name = "~";
    name += cname;
    Setattr(m, "name", name.c_str());
    }
  else
    {
    m = new_node("cdecl");
    Setattr(m, "name", mth->GetCallName().c_str());
    if(mth->GetVirtual())
      {
      Setattr(m, "storage", "virtual");
      if(mth->GetPureVirtual())
        {
        Setattr(m, "abstract", "1");
        }
      }
    if(mth->GetStatic())
      {
      Setattr(m, "storage", "static");
      }
    }
  if(access)
    {
    Setattr(m, "access", access);
    }

  // The following clause will instruct SWIG to let standard C++
  // exceptions propagate through as Python exceptions.  Original
  // version contributed by Charl P. Botha <cpbotha [AT] ieee.org>
  //
  // attaching this node as "throws" attribute to the method object
  // will cause the swig emit code to add an exception handler the
  // node only has to have a type-attribute with the type of the
  // object that will be thrown - in itk.swg the actual typemaps
  // live that map from the type of the throws to the catch code
  // that will actually be emited
  //
  // As soon as CableSwig gets proper throw() types from gcc_xml,
  // this little piece of code has to be adapted ever so slightly.
  Node *catchNode = NewHash();
  // for now we assume that every method could throw a std::exception
  Setattr(catchNode, "type", "std::exception");
  Setattr(m, "throws", catchNode);
  // take care of the memory
  Delete(catchNode);

  ParmList* parms = 0;
  Parm* pp = 0;
  std::string allParams;
  for(unsigned int arg = 0; arg < ft->GetNumberOfArguments(); ++arg)
    {
    std::string swigArg = this->ToSwigType(ft->GetArgument(arg)->GetCxxType());
    ::String* argName
        = NewString(swigArg.c_str());
    if(allParams.size())
      {
      allParams += ", ";
      }
    allParams += Char(argName);
    Parm* p = NewParm(argName, 0);
    Delete(argName);
    if(!parms)
      {
      parms = p;
      }
    else
      {
      set_nextSibling(pp, p);
      }
    pp = p;
    }
  std::string decl;
  if(mth->GetConst())
    {
    decl += "q(const).";
    }
  decl += "f(";
  decl +=  allParams;
  decl += ").";
  // Set the declaration on the method
  Setattr(m, "decl", decl.c_str());
  // if there are parameters set them
  if(parms)
    {
    Setattr(m, "parms", parms);
    }
  if(fid ==  cable::Function::ConstructorId)
    {
    Setattr(m, "feature:new", "1");
    }
  else if(fid == cable::Function::DestructorId)
    {
    }
  else
    {
    Setattr(m, "type",
            this->ToSwigType(ft->GetReturns()->GetCxxType()).c_str());
    }
  // add the method to the class
  appendChild(sc, m);
  // add the member name to the class
  std::string symbolName;
  if(fid == cable::Function::ConstructorId)
    {
    symbolName = cname;
    }
  else if(fid == cable::Function::DestructorId)
    {
    symbolName = cname;
    }
  else
    {
    symbolName = mth->GetCallName();
    }
  // python has print as a keyword, so rename
  // it to Print
  if(symbolName == "print" && m_WrapLanguage == "python")
    {
    symbolName = "Print";
    }
  // if the symbol is New, then change it to ClassNew because
  // java does not handle covarient return types even in statics
  if(symbolName == "New" && m_WrapLanguage == "java")
    {
    symbolName = cname;
    symbolName += "_New";
    }
  Swig_symbol_add((char*)symbolName.c_str(), m);
}




// Find the first base classes that are wrapped in a group
void CableSwig::FindWrappedBases(List* bases, const cable::Class* c, bool skipped, const cable::Class* startClass)
{
  if(!startClass)
    {
    startClass = c;
    }
  std::vector<cable::Class*> parents;
  c->GetBaseClasses(parents);
  bool foundBase = false;
  // look at the direct parents of Class c and
  // see if it is in a group, if so, add that
  // to the swig bases for the class and set foundBase to true
  for( std::vector<cable::Class*>::iterator i = parents.begin();
       i != parents.end(); ++i)
    {
    std::string group;
    if(this->FindClassGroup((*i)->GetQualifiedName().c_str(), &group))
      {
      ::String* s=  NewStringf("%s", this->TemplateName((*i)->GetQualifiedName().c_str()).c_str());
      Append(bases,s);
      foundBase = true;
      if(skipped)
        {
        if(startClass)
          {
          std::cerr << "Warning " << startClass->GetQualifiedName().c_str() 
                    << "\nhas a class hierarchy that has wrapping gaps.\n";
          std::cerr << "The class hierarchy wrapping is as follows:\n";
          std::vector<cable::Class*> allp;
          startClass->GetAllBaseClasses(allp);
          for(unsigned int j=0; j < allp.size(); ++j)
            {
            if(this->FindClassGroup(allp[j]->GetQualifiedName().c_str(), &group))
              {
              std::cerr << "    Wrapped: ";
              }
            else
              {
              std::cerr << "Not wrapped: ";
              }
            std::cerr << this->TemplateName(allp[j]->GetQualifiedName().c_str()).c_str() << "\n";
            }
          std::cerr << "\n";
          }
        else
          {
          std::cerr << "Warning " << startClass->GetQualifiedName().c_str() 
                    << "\nhas a class hierarchy that has wrapping gaps.\n";
          std::cerr << "The class hierarchy wrapping is as follows:\n";
          std::vector<cable::Class*> allp;
          startClass->GetAllBaseClasses(allp);
          for(unsigned int j=0; j < allp.size(); ++j)
            {
            if(this->FindClassGroup(allp[j]->GetQualifiedName().c_str(), &group))
              {
              std::cerr << "    Wrapped: ";
              }
            else
              {
              std::cerr << "Not wrapped: ";
              } 
            std::cerr << this->TemplateName(allp[j]->GetQualifiedName().c_str()).c_str() << "\n";
            }
          std::cerr << "\n";
          }
        }
      }
    }
  skipped = true;
  // if no direct bases were found to be in a group, then
  // try the next level of parent classes and recurse
  // back into this function
  if(!foundBase)
    {
    for( std::vector<cable::Class*>::iterator i = parents.begin();
         i != parents.end(); ++i)
      {
      this->FindWrappedBases(bases, *i, skipped, startClass);
      }
    }
}


// Create a swig class from the cable::Class c
// td is the typedef name for the class
Node* CableSwig::CreateSwigClass(const cable::Class* c, const char* td)
{
  std::string typedefName = this->GetClassName(c, td);
  std::string actualName = this->TemplateName(c->GetName()).c_str();


  cable::Context* context = c->GetContext();
  if(context && cable::Class::SafeDownCast(context))
    {
    typedefName = actualName = c->GetQualifiedName();
    }

  Node* sc = new_node("class");
  Setattr(sc, "name", actualName.c_str());
  Setattr(sc,"kind","class");
  Setattr(sc,"allows_typedef","1");
  // Create symbol table information
  // create a new scope
  Symtab* sym = Swig_symbol_newscope();
  Swig_symbol_setscopename(typedefName.c_str());
  // set the symtab on the class
  Setattr(sc,"symtab",sym);
  // pop out of the new scope so we can add the class
  // to the outer scope
  Swig_symbol_popscope();
  // add the class to the current scope
  Swig_symbol_add((char*)typedefName.c_str(), sc);
  // Set the scope to the scope of the class for adding the methods
  Swig_symbol_setscope(sym);

  // first private methods
  Node* p = new_node("access");
  Setattr(p,"kind","private");
  // add the private declaration to the class
  appendChild(sc, p);
  for(cable::Class::Iterator i = c->Begin(); i != c->End(); ++i)
    {
    cable::Method* mth = cable::Method::SafeDownCast(*i);
    if(mth && (i.GetAccess() == cable::Class::Private))
      {
      CreateSwigMethod(mth, sc, typedefName, "private");
      }
    }

  // protected methods
  p = new_node("access");
  Setattr(p,"kind","protected");
  // add the protected declaration to the class
  appendChild(sc, p);
  for(cable::Class::Iterator i = c->Begin(); i != c->End(); ++i)
    {
    cable::Method* mth = cable::Method::SafeDownCast(*i);
    if(mth && (i.GetAccess() == cable::Class::Protected))
      {
      CreateSwigMethod(mth, sc, typedefName, "protected");
      }
    }

  // public methods
  p = new_node("access");
  Setattr(p,"kind","public");
  // add the public declaration to the class
  appendChild(sc, p);
  for(cable::Class::Iterator i = c->Begin(); i != c->End(); ++i)
    {
    cable::Method* mth = cable::Method::SafeDownCast(*i);
    if(mth && (i.GetAccess() == cable::Class::Public))
      {
      CreateSwigMethod(mth, sc, typedefName, "public");
      }
    }
  Setattr(sc,"abstract", pure_abstract(firstChild(sc)));
  SwigType_typedef_class((char*)this->TemplateName(c->GetName()).c_str());
  List *bases = NewList();
  this->FindWrappedBases(bases, c);
  if(Len(bases))
    {
    Setattr(sc, "baselist", bases);
    }
  // if no methods , then we don't know if the class
  // has a public constructor or not, so we have to assume the worst
  // and tell swig to use the SwigWrapper template
  if(c->Begin() == c->End())
    {
    Setattr(sc,"allocate:noassign", "1");
    }

  // leave the scope of the class
  Swig_symbol_popscope();
  return sc;
}


// Create a swig node for a class and a namespace
// and add them into the tree
Node* CableSwig::CreateSwigClassInNamespace(const cable::Class*c, const char* td,
                                            Node* top, const char* swigtype,
                                            Node* moduleIn)
{
  // if the class has already been included or imported
  // then do nothing and return
  if(m_ClassesIncludedOrImported.find(c) != m_ClassesIncludedOrImported.end())
    {
    return 0;
    }
  // add the class to the included or imported set
  m_ClassesIncludedOrImported.insert(c);
  // check to see if this is a nested class, and if so,
  // skip it because swig can not handle that case
  cable::Context* context = c->GetContext();
  cable::Namespace* classNameSpace = cable::Namespace::SafeDownCast(context);
  // look for nested namespace and skip them for now
  context = context->GetContext();
  if(context && (strcmp(context->GetName(), "::") != 0))
    {
    if(classNameSpace)
      {
      // Nested namespace.  Add a using declaration to work around
      // swig behavior.
      m_NamespacesToUse.insert(context->GetName());
      }
    else
      {
      // Nested class.  Skip it.
      return 0;
      }
    }
  // Create a new module node that copies the values from moduleIn
  Node* module = this->new_node("module");
  Setattr(module, "name", Getattr(moduleIn, "name"));
  Node* nameSpaceNode = 0;
  Node* priorScope =  Swig_symbol_current();  // save the swig scope
  // check to see if the class is in a namespace other than
  // the global one ::
  if(classNameSpace &&
     (strcmp(classNameSpace->GetName(), "::") != 0))
    {
    // create a new node for the namespace
    nameSpaceNode = new_node("namespace");
    Hash *h;
    // check for an existing namespace
    h = Swig_symbol_clookup((char*)classNameSpace->GetName(),0);
    if (h && (Strcmp(nodeType(h),"namespace") == 0))
      {
      if (Getattr(h,"alias"))
        {
        h = Getattr(h,"namespace");
        }
      Swig_symbol_setscope(Getattr(h,"symtab"));
      }
    // this is a new namespace
    else
      {
      Swig_symbol_newscope();
      Swig_symbol_setscopename(classNameSpace->GetName());
      }
    } 
  
  // Create the swig class node
  Node* swigClassNode = CreateSwigClass(c, td);
  if(context && cable::Class::SafeDownCast(context))
    {
    // ignore all nested classes
    Setattr(swigClassNode, "feature:ignore", "1");
    }

  // once the class has been created, we can finish
  // off the namespace creatation, and pop the scope
  if(nameSpaceNode)
    {
    set_nodeType(nameSpaceNode,"namespace");
    Setattr(nameSpaceNode,"name",classNameSpace->GetName());
    Setattr(nameSpaceNode,"symtab", Swig_symbol_popscope());
    Swig_symbol_setscope(priorScope);
    Swig_symbol_add((char*)classNameSpace->GetName(), nameSpaceNode);
    }

  // at this point we have a nameSpaceNode and a swigClassNode
  // create include an include or import node for the class
  Node* importOrIncludeNode = new_node(swigtype);
  Setattr(importOrIncludeNode,"name", c->GetFile());
  Setattr(importOrIncludeNode,"module", Getattr(module, "name"));
  // add the module to the include or import node
  appendChild(importOrIncludeNode, module);

  if(nameSpaceNode)
    {
    // add the class to the namespace
    appendChild(nameSpaceNode, swigClassNode);
    // add the namespace to the import or include
    appendChild(importOrIncludeNode, nameSpaceNode);
    }
  else
    {
    // add the class to the import or include
    appendChild(importOrIncludeNode, swigClassNode);
    }
  // add the importOrIncludeNode to the top node
  appendChild(top, importOrIncludeNode);
  return swigClassNode;
}


// parse the name for a group from the cable config file
bool CableSwig::ParseName(const char* name, std::string& result)
{
  std::string group = name;
  std::string::size_type l = group.find('"');
  std::string::size_type r = group.rfind('"');
  if((l != std::string::npos) && (r != std::string::npos) && (r > l))
    {
    result = group.substr(l+1, r-l-1);
    return true;
    }
  return false;
}


// find the group and package information
bool CableSwig::GetGroupAndPackageInformation(cable::Namespace* cns,
                                              std::string& groupName,
                                              std::vector<std::string>& groupsNames,
                                              std::string& packageName,
                                              std::string& packageVersion,
                                              std::string& configFile)
{
  const cable::Variable* group = 0;
  cable::Context::Iterator lower = cns->LowerBound("group");
  cable::Context::Iterator upper = cns->UpperBound("group");
  if(lower != upper)
    {
    group = cable::Variable::SafeDownCast(*lower);
    if(!group)
      {
      std::cerr << "Identifier _cable_::group is not a variable.\n";
      return false;
      }
    }
  // Find the groups list, if any.
  const cable::Variable* groups = 0;
  lower = cns->LowerBound("groups");
  upper = cns->UpperBound("groups");
  if(lower != upper)
    {
    groups = cable::Variable::SafeDownCast(*lower);
    if(!groups)
      {
      std::cerr << "Identifier _cable_::groups is not a variable.\n";
      return false;
      }
    }

  // Find the package name, if any.
  const cable::Variable* package = 0;
  lower = cns->LowerBound("package");
  upper = cns->UpperBound("package");
  if(lower != upper)
    {
    package = cable::Variable::SafeDownCast(*lower);
    if(!package)
      {
      std::cerr << "Identifier _cable_::package is not a variable.\n";
      return false;
      }
    }

  // Find the package version, if any.
  const cable::Variable* package_version = 0;
  lower = cns->LowerBound("package_version");
  upper = cns->UpperBound("package_version");
  if(lower != upper)
    {
    package_version = cable::Variable::SafeDownCast(*lower);
    if(!package_version)
      {
      std::cerr << "Identifier _cable_::package_version is not a variable.\n";
      return false;
      }
    }
  if(group)
    {
    if(!ParseName(group->GetInitializer(), groupName))
      {
      std::cerr << "Error parsing group name.\n";
      return false;
      }

    // Hold on to the name of the configuration file.
    configFile = group->GetFile();
    }
  if(package && !ParseName(package->GetInitializer(), packageName))
    {
    std::cerr << "Error parsing package name.\n";
    return false;
    }
  if(package_version &&
     !ParseName(package_version->GetInitializer(), packageVersion))
    {
    std::cerr << "Error parsing package version string.\n";
    return false;
    }

  if(groups)
    {
    std::string gl = groups->GetInitializer();
    std::string::size_type lpos = gl.find('"');
    while((lpos != std::string::npos) && (lpos < gl.length()))
      {
      std::string::size_type rpos = gl.find_first_of(",}", lpos);
      std::string result;
      if((rpos == std::string::npos) ||
         !ParseName(gl.substr(lpos, rpos-lpos).c_str(), result))
        {
        std::cerr << "Error parsing groups list.\n";
        return false;
        }
      groupsNames.push_back(result);
      lpos = rpos+1;
      }
    }
  return true;
}


// Get the tcl init function name
std::string CableSwig::GetTclName(const char* s)
{
  std::string tclName = s;
  std::string::iterator c = tclName.begin();
  if(c != tclName.end())
    {
    char ch = *c;
    if((ch >= 'a') && (ch <= 'z'))
      {
      *c = (ch+('A'-'a'));
      }
    for(++c; c != tclName.end(); ++c)
      {
      char ch = *c;
      if((ch >= 'A') && (ch <= 'Z'))
        {
        *c = (ch+('a'-'A'));
        }
      }
    }
  return tclName;
}


void CableSwig::AddImportClass( const cable::Type* ct)
{
  if(const cable::ReferenceType* ref = cable::ReferenceType::SafeDownCast(ct))
    {
    ct = ref->GetTarget();
    }
  if(const cable::PointerType* ptr = cable::PointerType::SafeDownCast(ct))
    {
    ct = ptr->GetTarget();
    }
  const cable::ClassType* rt = cable::ClassType::SafeDownCast(ct);
  if(rt)
    {
    // add the class into the list
    this->AddClassToBeImported(rt->GetClass());
    }
}


void CableSwig::AddImportReturnTypesAndArguments(cable::Class const* c)
{
  for(cable::Class::Iterator i = c->Begin(); i != c->End(); ++i)
    {
    cable::Method* mth = cable::Method::SafeDownCast(*i);
    if(mth)
      {
      cable::FunctionType* ft = mth->GetFunctionType();
      this->AddImportClass(ft->GetReturns());
      for(unsigned int arg = 0; arg < ft->GetNumberOfArguments(); ++arg)
        {
        this->AddImportClass(ft->GetArgument(arg));
        }
      }
    }
}

// add a class to the m_ClassesIncludedOrImported map
void CableSwig::AddClassToBeImported(cable::Class const* c)
{
  // if the class is already in the import map, then return
  if(m_ClassesToBeImported.find(c) != m_ClassesToBeImported.end())
    {
    return;
    }
  // 1. add the class first to stop recursion
  m_ClassesToBeImported.insert(c);
  // 2. add all the parent classes of c to map of imported classes
  std::vector<cable::Class*> parents;
  c->GetAllBaseClasses(parents);
  for( std::vector<cable::Class*>::iterator i = parents.begin();
       i != parents.end(); ++i)
    {
    // check to see if the parent has already been added
    if(m_ClassesToBeImported.find(*i) == m_ClassesToBeImported.end())
      {
      m_ClassesToBeImported.insert(*i);
      this->AddImportReturnTypesAndArguments(*i);
      }
    else
      {
      // stop processing parents if a parent is already imported
      break;
      }
    }
  // 3. add all return types and function arguments
  this->AddImportReturnTypesAndArguments(c);
}


// In swig a class can be in one of three states:
// 1. included - these classes will be wrapped
// 2. imported - these classes are wrapped in another file, but can be refered to
// 3. included but ignored - these classes are not wrapped but information about them
//    can be used by swig.
// This function walks the cable wrappers namespace and finds out which
// classes belong to which group.
// The following ivars are filled here:
// m_TypedefLookup -  map from class to typedef for included classes
// m_ClassesToBeIncluded  - set of classes to be included
// m_ClassesToBeImported  - set of classes to be imported
void CableSwig::DetermineClassesToWrap(const cable::Namespace* cns)
{
  const cable::Namespace* wns = 0;
  cable::Context::Iterator lower = cns->LowerBound("wrappers");
  cable::Context::Iterator upper = cns->UpperBound("wrappers");
  if(lower != upper)
    {
    wns = cable::Namespace::SafeDownCast(*lower);
    if(!wns)
      {
      return;
      }
    }
  if(!wns)
    {
    return;
    }
  for(cable::Context::Iterator w = wns->Begin(); w != wns->End(); ++w)
    {
    cable::Typedef* td = cable::Typedef::SafeDownCast(*w);
    if(td)
      {
      const cable::ClassType* ct = cable::ClassType::SafeDownCast(td->GetType());
      if(ct)
        {
        const cable::Class* c = ct->GetClass();
        // add this class and its typedef to the
        // list of classes that will be included
        m_TypedefLookup.insert(std::pair<const cable::Class*, cable::Typedef*>(c, td));
        m_ClassesToBeIncluded.insert(c);
        // add this class to the import list so that the parent
        // and all the return types are added as well
        // it will be removed below
        this->AddClassToBeImported(c);
        }
      }
    }
  // Now remove all the classes that will be included
  // from the list of imported classes
  for(std::set<const cable::Class*>::iterator i = m_ClassesToBeIncluded.begin();
      i != m_ClassesToBeIncluded.end(); ++i)
    {
    m_ClassesToBeImported.erase(*i);
    }
}


// handle all the imported classes
void CableSwig::ProcessImportedClasses(Node* top, Node* module)
{
  for(std::set<const cable::Class*>::iterator i = m_ClassesToBeImported.begin();
      i != m_ClassesToBeImported.end(); ++i)
    {
    const cable::Class* c = *i;
    std::vector<cable::Class*> parents;
    c->GetAllBaseClasses(parents);
    for(int j = parents.size()-1; j >=0; --j)
      {
      const cable::Class* p = parents[j];
      if(m_ClassesToBeIncluded.find(p) != m_ClassesToBeIncluded.end())
        {
        std::map<const cable::Class*, cable::Typedef*>::iterator tdi = m_TypedefLookup.find(p);
        cable::Typedef* td = 0;
        if(tdi != m_TypedefLookup.end())
          {
          td = tdi->second;
          this->CreateSwigClassInNamespace(p, td->GetName(), top, "include", module);
          }
        else
          {
          Swig_error(c->GetFile(), c->GetLine(), "no typedef found in map");
          }
        }
      else
        {
        std::string group;
        if(this->FindClassGroup(p->GetQualifiedName().c_str(), &group))
          {
          Node* importModule = new_node("module");
          Setattr(importModule, "name", group.c_str());
          std::string cname;
          this->FindImportTypedef(p->GetQualifiedName().c_str(), &cname);
          this->CreateSwigClassInNamespace(p, cname.c_str(), top, "import", importModule);
          Delete(importModule);
          }
        else
          { 
          Node* includeModule = new_node("include");
          Setattr(includeModule, "name", p->GetFile());
          Node* sc =
            this->CreateSwigClassInNamespace(p, p->GetName(), top, "include", includeModule);
          if(sc)
            {
            Setattr(sc, "feature:ignore", "1");
            }
          Delete(includeModule);
          }
        }
      }
    std::string group;
    if(!this->FindClassGroup(c->GetQualifiedName().c_str(), &group))
      {
      Node* includeModule = new_node("include");
      Setattr(includeModule, "name", c->GetFile());
      Node* sc =
        this->CreateSwigClassInNamespace(c, c->GetName(), top, "include", includeModule);
      if(sc)
        {
        Setattr(sc, "feature:ignore", "1");
        }
      Delete(includeModule);
      }
    else
      {
      Node* importModule = new_node("module");
      Setattr(importModule, "name", group.c_str());
      std::string cname;
      this->FindImportTypedef(c->GetQualifiedName().c_str(), &cname);
      this->CreateSwigClassInNamespace(c, cname.c_str(), top, "import",importModule);
      Delete(importModule);
      }
    }
}




// handle all the included classes
void CableSwig::ProcessIncludedClasses(Node* top, Node* module)
{
  for(std::set<const cable::Class*>::iterator i = m_ClassesToBeIncluded.begin();
      i != m_ClassesToBeIncluded.end(); ++i)
    {
    const cable::Class* c = *i;
    // include or import all parents in reverse order
    std::vector<cable::Class*> parents;
    c->GetAllBaseClasses(parents);
    for(int j = parents.size()-1; j >=0; --j)
      {
      const cable::Class* p = parents[j];
      if(m_ClassesToBeIncluded.find(p) != m_ClassesToBeIncluded.end())
        {
        std::map<const cable::Class*, cable::Typedef*>::iterator tdi = m_TypedefLookup.find(p);
        cable::Typedef* td = 0;
        if(tdi != m_TypedefLookup.end())
          {
          td = tdi->second;
          this->CreateSwigClassInNamespace(p, td->GetName(), top, "include", module);
          }
        else
          {
          Swig_error(c->GetFile(), c->GetLine(), "no typedef found in map");
          std::cerr << "class skipped " << c->GetName() << "\n";
          }
        }
      else
        {
        std::string group;
        if(!this->FindClassGroup(p->GetQualifiedName().c_str(), &group))
          {
          Node* importModule = new_node("include");
          Setattr(importModule, "name", p->GetFile());
          Node* sc =
            this->CreateSwigClassInNamespace(p, p->GetName(), top, "include", importModule);
          // the module for the class is not known, so it is ignored
          if(sc)
            {
            Setattr(sc, "feature:ignore", "1");
            }
          Delete(importModule);
          }
        else
          {
          Node* importModule = new_node("module");
          Setattr(importModule, "name", group.c_str());
          std::string cname;
          this->FindImportTypedef(p->GetQualifiedName().c_str(), &cname);
          this->CreateSwigClassInNamespace(p, cname.c_str(), top, "import", importModule);
          Delete(importModule);
          }
        }
      }
    std::map<const cable::Class*, cable::Typedef*>::iterator tdi = m_TypedefLookup.find(c);
    cable::Typedef* td = 0;
    if(tdi != m_TypedefLookup.end())
      {
      td = tdi->second;
      this->CreateSwigClassInNamespace(c, td->GetName(), top, "include", module);
      }
    else
      {
      Swig_error(c->GetFile(), c->GetLine(), "no typedef found in map");
      std::cerr << "class skipped " << c->GetName() << "\n";
      }
    }
}


// walk the cable namespace and create the swig tree
bool CableSwig::ProcessSource(cable::SourceRepresentation::Pointer sr, Node* top)
{
  const cable::Namespace* gns = sr->GetGlobalNamespace();
  // Find the cable configuration namespace.
  cable::Context::Iterator lower = gns->LowerBound("_cable_");
  cable::Context::Iterator upper = gns->UpperBound("_cable_");
  cable::Namespace* cns = 0;
  if(lower != upper)
    {
    cns = cable::Namespace::SafeDownCast(*lower);
    if(!cns)
      {
      return false;
      }
    }
  if(!cns)
    {
    return false;
    }
  std::string group;
  std::vector<std::string> groups;
  std::string package;
  std::string packageVersion;
  std::string configFile;
  this->GetGroupAndPackageInformation(cns, group, groups, package, packageVersion, configFile);
  if(group.size() == 0)
    {
    if(package.size() == 0)
      {
      std::cerr << "No group or package name specified. ";
      return false;
      }
    }

  // Create a node to use later for adding code at this point in the
  // generated output.
  Node* includeConfigNode = 0;
  if(configFile.size())
    {
    includeConfigNode = new_node("insert");
    Setattr(includeConfigNode, "section", "header");
    appendChild(top, includeConfigNode);
    }

  // look for the std namespace, and if there isn't one, use
  // the global namespace.
  // we are searching for the typedef for std::string because
  // we do not want basic_string<....> to be used, but instead
  // want the swig std_string.i std::string to be used.
  // So we set m_NativeStringName to the basic_string<...> version
  // of the class.
  cable::Namespace const* sns;
  cable::Context::Iterator stdLower = gns->LowerBound("std");
  cable::Context::Iterator stdUpper = gns->UpperBound("std");
  if(stdLower != stdUpper)
    {
    sns = cable::Namespace::SafeDownCast(*stdLower);
    }
  else
    {
    sns = gns;
    }
  for(cable::Context::Iterator w = sns->Begin(); w != sns->End(); ++w)
    {
    cable::Typedef* td = cable::Typedef::SafeDownCast(*w);
    if(td && (strcmp(td->GetName(), "string")==0))
      {
      m_NativeStringName = td->GetType()->GetCxxType().GetName();
      }
    }

  cable::Context::Iterator renamesLower = cns->LowerBound("renames");
  cable::Context::Iterator renamesUpper = cns->UpperBound("renames");
  if(renamesLower != renamesUpper)
    {
    // There are renames present.  Do not generate any wrappers.
    // Create a fake group name.
    group = group+"RenameHack";
    }

  // Create a module node that has the group name
  Node* module = new_node("module");
  if(group.size() == 0)
    {
    Setattr(module, "name", package.c_str());
    }
  else
    {
    Setattr(module, "name", group.c_str());
    }
  bool pythonWrap = false;
  if(m_WrapLanguage == "python")
    {
    pythonWrap = true;
    }
  bool javaWrap = false;
  if(m_WrapLanguage == "java")
    {
    javaWrap = true;
    }
  bool javaInitDone = false;

  // Fix the case of the package name for Tcl package loader.
  if(package != group && groups.size() > 0)
    {
    std::cout << "create swig package "<< package << "\n";
    // start off with the definitions for DECLARE_MODULE_INIT and
    // CALL_MODULE_INIT
    std::string headerCode = SwigInitMacrosString;
    std::string initCode;
    std::string pythonCode;
    std::string javaCode;
    javaCode = "public void dummy() {\nObject o;\n";
    for(std::vector<std::string>::iterator i = groups.begin();
        i != groups.end(); ++i)
      {
      if(pythonWrap)
        {
        pythonCode += "from ";
        pythonCode += *i;
        pythonCode +=  " import *\n";
        }
      if(javaWrap)
        {
        javaCode += "o = new ";
        javaCode += *i;
        javaCode += "();\n";
        }
      std::cout << "  init module: " << i->c_str() << "\n";
      std::string tname = GetTclName(i->c_str());
      headerCode += "\nDECLARE_MODULE_INIT(";
      headerCode += *i;
      headerCode += ", ";
      headerCode += tname;
      headerCode += ") \n";

      initCode += "\nCALL_MODULE_INIT(";
      initCode += *i;
      initCode += ", ";
      initCode += tname;
      initCode += ") \n";
      }
    if(pythonWrap)
      {
      Node* python = new_node("insert");
      Setattr(python, "code", pythonCode.c_str());
      Setattr(python, "section", "python");
      appendChild(top, python);
      }
    if(javaWrap)
      {
      // Make sure the loader classes are recompiled correctly.
      for(std::vector<std::string>::iterator i = m_Loaders.begin();
          i != m_Loaders.end(); ++i)
        {
        javaCode += "o = new ";
        std::string loader = *i;
        loader = loader.substr(0, loader.rfind('.'));
        javaCode += loader;
        javaCode += "();\n";
        }
      javaInitDone = true;
      javaCode += "}\n";
      Node* java = new_node("pragma");
      Setattr(java, "value", javaCode.c_str());
      Setattr(java, "name", "modulecode");
      Setattr(java, "lang", "java");
      appendChild(top, java);
      }

    Node* header = new_node("insert");
    Setattr(header, "code", headerCode.c_str());
    Setattr(header, "section", "header");

    Node* init = new_node("insert");
    Setattr(init, "code", initCode.c_str());
    Setattr(init, "section", "init");
    appendChild(top, header);
    appendChild(top, init);
    }

  // collect up all classes to be included or imported
  this->DetermineClassesToWrap(cns);
  // first process imported classes
  Node* importModule = new_node("module");
  Setattr(importModule, "name", "cableImport");
  this->ProcessImportedClasses(top, importModule);
  // next process included classes
  this->ProcessIncludedClasses(top, module);

  Setattr(top, "name", Getattr(module, "name"));
  Setattr(top, "module", module);
  if(javaWrap && !javaInitDone)
    {
    std::string javaCode = "public void dummy() {\n   Object o;\n";;
    for(std::set<const cable::Class*>::iterator i = m_ClassesToBeIncluded.begin();
        i != m_ClassesToBeIncluded.end(); ++i)
      {
      const cable::Class* c = *i;
      std::map<const cable::Class*, cable::Typedef*>::iterator tdi = m_TypedefLookup.find(c);
      if(tdi != m_TypedefLookup.end())
        {
        cable::Typedef* td = tdi->second;
        javaCode += "   o = ";
        if(c->LowerBound("New") != c->UpperBound("New"))
          {
          javaCode += td->GetName();
          javaCode += ".";
          javaCode += td->GetName();
          javaCode += "_New();\n";
          }
        else
          {
          javaCode += "new ";
          javaCode += td->GetName();
          javaCode += "();\n";
          }
        }
      }
    javaCode += "\n}\n";
    Node* java = new_node("pragma");
    Setattr(java, "value", javaCode.c_str());
    Setattr(java, "name", "modulecode");
    Setattr(java, "lang", "java");
    appendChild(top, java);

    if(!m_Loaders.empty())
      {
      java = new_node("pragma");
      javaCode = "  static {\n";
      for(std::vector<std::string>::iterator i = m_Loaders.begin();
          i != m_Loaders.end(); ++i)
        {
        javaCode += "    ";
        javaCode += *i;
        javaCode += ";\n";
        }
      javaCode += "  }\n";
      Setattr(java, "value", javaCode.c_str());
      Setattr(java, "name", "jniclasscode");
      Setattr(java, "lang", "java");
      appendChild(top, java);
      }
    }

  // Include the cable configuration file
  if(includeConfigNode)
    {
    std::string headerCode = "\n#include <";
    headerCode += configFile;
    headerCode += ">\n";
    // Add using directives for nested namespaces.
    for(std::set<std::string>::const_iterator i = m_NamespacesToUse.begin();
        i != m_NamespacesToUse.end(); ++i)
      {
      headerCode += "using namespace ";
      headerCode += *i;
      headerCode += ";\n";
      }
    headerCode += "#include <exception>\n";
    Setattr(includeConfigNode, "code", headerCode.c_str());
    }

  //  printf("********************cable swig file******************\n");
  //  Swig_print_tree(top);
  //  printf("********************end cable swig file******************\n");

  return true;
}



// This is what is called by swig
int CableSwig::ParseFile(const char* input_file, Node* top,
                         const char* wrapLang)
{
  m_WrapLanguage = wrapLang;
  bool verbose = false;
  const char* inFileName = input_file;

  if(!this->ReadMasterIndexFile())
    {
    return 1;
    }

  if(!inFileName)
    {
    std::cerr << "Must specify input file name (use --help for options).\n";
    return 1;
    }

  if(verbose)
    {
    std::cout << "Using input file \"" << inFileName << "\"\n";
    }
  // Open the XML input file produced by GCC-XML.
  std::ifstream inFile(inFileName);
  if(!inFile)
    {
    std::cerr << "Error opening GCC-XML output file: \""
              << inFileName << "\"\n";
    return 1;
    }

  // Parse the XML input file.
  cable::XMLSourceParser::Pointer parser = cable::XMLSourceParser::New();
  parser->SetStream(&inFile);
  if(!parser->Parse())
    {
    std::cerr << "Errors occurred during parsing of GCC-XML output: "
              << inFileName << "\n";
    return 1;
    }
  parser->SetStream(0);
  inFile.close();

  // Get the parsed source representation.
  cable::SourceRepresentation::Pointer sr = parser->GetSourceRepresentation();
  if(!sr)
    {
    std::cerr << "Error getting SourceRepresentation from parser.\n";
    return 1;
    }
  if(m_DependFile.size())
    {
    this->DumpCMakeDependInformation(parser, m_DependFile.c_str());
    }

  if(!ProcessSource(sr, top))
    {
    return 1;
    }
  return 0;
}


Node *CableSwig::new_node(const String_or_char *tag)
{
  Node *n = NewHash();
  set_nodeType(n,tag);
  if(m_CurrentFile)
    {
    Setfile(n,(char*)m_CurrentFile);
    Setline(n,m_CurrentLine);
    }
  return n;
}

void CableSwig::AddMasterIndexFile(const char* s)
{
  if(s)
    {
    m_MasterIndexFiles.push_back(s);
    }
}

// Find out what group a class is in.
// if no group is found, then return false
bool CableSwig::FindClassGroup(const char* className, std::string* group)
{
  std::map<csString, csString>::iterator i = m_ClassGroupLookup.find(className);
  if(i != m_ClassGroupLookup.end())
    {
    if(group)
      {
      *group =  (*i).second;
      }
    return true;
    }
  return false;
}



// find the typedef name for a class that is imported
bool CableSwig::FindImportTypedef(const char* className, std::string* typeName)
{
  std::map<csString, csString>::iterator i = m_ImportTypedefLookup.find(className);
  if(i != m_ImportTypedefLookup.end())
    {
    if(typeName)
      {
      *typeName =  (*i).second;
      }
    return true;
    }
  if(typeName)
    {
    *typeName = className;
    }
  return false;
}


// Read a .mdx file line
void CableSwig::ParseIndexInformation(const char* s)
{
  std::string packageInfo = s;
  std::string::size_type p1 = packageInfo.find("{");
  if(p1 == packageInfo.npos)
    {
    return;
    }
  std::string::size_type p2 = packageInfo.find("}");
  std::string qualifiedName = packageInfo.substr(p1+1, p2 - p1-1);
  p1 = packageInfo.find("{", p2);
  p2 = packageInfo.find("}", p1);
  std::string typeDef = packageInfo.substr(p1+1, p2 - p1-1);
  p1 = packageInfo.find("{", p2);
  p2 = packageInfo.find("}", p1);
  std::string package = packageInfo.substr(p1+1, p2 - p1-1);
  m_ClassGroupLookup[qualifiedName] = package;
  if(m_ImportTypedefLookup.find(qualifiedName) != m_ImportTypedefLookup.end())
    {
    std::cerr << "Warning " << qualifiedName.c_str() << " seems to be wrapped twice.\n";
    }
  m_ImportTypedefLookup[qualifiedName] = typeDef;
}


// Read a master index file .mdx
// this file contains the names of all the .idx files in a package
bool CableSwig::ReadMasterIndexFile()
{
  for(std::vector<std::string>::iterator i = m_MasterIndexFiles.begin();
      i != m_MasterIndexFiles.end(); ++i)
    {
    std::ifstream fin(i->c_str());
    if(!fin)
      {
      std::cerr << "error can not open " << *i << "\n";
      return false;
      }
    char buffer[5000];
    while(fin)
      {
      fin.getline(buffer, 5000);
      if(strlen(buffer) == 0)
      {
        continue;
      }
      if(buffer[0] == '%')
        {
        std::string loader = buffer;
        if(loader.substr(0, 12) == "%JavaLoader=")
          {
          m_Loaders.push_back(loader.substr(12));
          }
        continue;
        }
      std::ifstream idxIn(buffer);
      if(!idxIn)
      {
        std::cerr << "error can not open " << buffer << '\n';
        return false;
      }
      while(idxIn)
        {
        idxIn.getline(buffer, 5000);
        this->ParseIndexInformation(buffer);
        }
      }
    }
  return true;
}


bool CableSwig::DumpCMakeDependInformation(cable::XMLSourceParser::Pointer sr,
                                           const char* f)
{
  std::string temp = f;
  temp += ".tmp";
  std::ofstream fout(temp.c_str());
  if(!fout)
    {
    std::cerr << "Could not open depend file for write " << f << "\n";
    return false;
    }

  std::vector<std::string> files;
  sr->GetFileNames(files);
  fout << "SET(CABLE_SWIG_DEPEND\n";

  for(std::vector<std::string>::iterator i = files.begin();
      i != files.end(); ++i)
    {
    fout << '\"' << *i << "\"\n";
    }
  fout << ")\n";
  fout.close();
  cable::SystemTools::CopyFileIfDifferent(temp.c_str(), f);
  cable::SystemTools::RemoveFile(temp.c_str());
  return true;
}


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