BaseReader.hh

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//=============================================================================
//
//  Implements the baseclass for IOManager file access modules
//
//=============================================================================
 
#pragma once
 
//=== INCLUDES ================================================================
 
 
// STD C++
#include <iosfwd>
#include <string>
#include <cctype>
#include <functional>
#include <algorithm>
 
// OpenMesh
#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/IO/Options.hh>
#include <OpenMesh/Core/IO/importer/BaseImporter.hh>
#include <OpenMesh/Core/Utils/SingletonT.hh>
 
 
//== NAMESPACES ===============================================================
 
 
namespace OpenMesh {
namespace IO {
 
 
//=== IMPLEMENTATION ==========================================================
 
 
class OPENMESHDLLEXPORT BaseReader
{
public:
 
  virtual ~BaseReader() {}
 
  virtual std::string get_description() const = 0;
  
  virtual std::string get_extensions() const = 0;
 
  virtual std::string get_magic() const { return std::string(""); }
 
 
  virtual bool read(const std::string& _filename, 
                    BaseImporter& _bi,
                    Options& _opt) = 0;
                
  virtual bool read(std::istream& _is, 
                    BaseImporter& _bi,
                    Options& _opt) = 0;
 
 
  virtual bool can_u_read(const std::string& _filename) const;
 
 
protected:
 
  // case insensitive search for _ext in _fname.
  bool check_extension(const std::string& _fname, 
                       const std::string& _ext) const;
};
 
 
static inline std::string &left_trim(std::string &_string) {
 
  // Find out if the compiler supports CXX11
  #if ( __cplusplus >= 201103L || _MSVC_LANG >= 201103L )
    // as with CXX11 we can use lambda expressions
    _string.erase(_string.begin(), std::find_if(_string.begin(), _string.end(), [](int i)->int { return ! std::isspace(i); }));
  #else
    // we do what we did before
    _string.erase(_string.begin(), std::find_if(_string.begin(), _string.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
  #endif
  
  return _string;
}
 
static inline std::string &right_trim(std::string &_string) {
 
  // Find out if the compiler supports CXX11
  #if ( __cplusplus >= 201103L || _MSVC_LANG >= 201103L )
    // as with CXX11 we can use lambda expressions
    _string.erase(std::find_if(_string.rbegin(), _string.rend(), [](int i)->int { return ! std::isspace(i); } ).base(), _string.end());
  #else
    // we do what we did before
    _string.erase(std::find_if(_string.rbegin(), _string.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), _string.end());
  #endif
 
 
 
  return _string;
}
 
static inline std::string &trim(std::string &_string) {
  return left_trim(right_trim(_string));
}
 
 
 
//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================