/**********************************************************************
// @@@ START COPYRIGHT @@@
//
// Licensed to the Apache Software Foundation (ASF) under one
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// to you under the Apache License, Version 2.0 (the
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**********************************************************************/
/* -*-C++-*-
 *****************************************************************************
 *
 * File:         ProcessEnv.h
 * Description:  The class declaration for the process environment. i.e.
 *               current working directory and environment variables.
 *               
 *               
 * Created:      07/10/96
 * Language:     C++
 *
 *
 *
 *
 *****************************************************************************
 */


#ifndef PROCESSENV_H
#define PROCESSENV_H

// ProcessEnv contains the methods for setting the runtime environment
// for certain process, including current working directory(chdir) and
// environment variables. Eventually whatever sqlci handles for environment
// setup should be set here. This is for arkcmp to set up the same run time
// environment as sqlci.

class ProcessEnv : public NABasicObject
{
public:

  ProcessEnv(CollHeap *heap) ;
  
  void cleanup();
  void setEnv(char** newenvs, Lng32 nEnvs);
#ifdef NA_CMPDLL
  void addOrChangeEnv(char **newenvs, Lng32 nEnvs);
  void resetEnv(const char *envName);
#endif // NA_CMPDLL
  Int32 unsetEnv(char* env);  
  Int32 chdir(char* dir);
  void dumpEnvs();
  
  virtual ~ProcessEnv();
  
private:
#ifndef NA_CMPDLL
  void addOrChangeEnv(char **newenvs, Lng32 nEnvs);
#endif // ! NA_CMPDLL
  void removeEnv(char **newenvs, Lng32 nEnvs);

  CollHeap *heap_;
  // The following members are used to keep the environment variable info.
  NAArray<char*> envs_;
  // Copy Constructor Unimplemented, to prevent an accidental use of 
  // the default byte copy operation
  // Copy Constructor Unimplemented, to prevent an accidental use of 
  // the default byte copy operation
  ProcessEnv& operator=(const ProcessEnv&);
  ProcessEnv(const ProcessEnv&);
};

#endif