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envi/EnviOpen.h 1.8 KB
a47a23a9   dmayerich   added ENVI functions
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  #ifndef ENVIOPEN_H
  #define ENVIOPEN_H
  #include <string>
  #include <iostream>
  #include <fstream>
  #include <ctime>
  #include <sstream>
  #include <stdio.h>
  #include "EnviHeader.h"
  #include "EnviFid.h"
  using namespace std;
  
  
  
  //return value is incorrect
  static EnviFidClass EnviOpen(string filename, char* mask = NULL, string mode = "r", int nBands = 0, int sX = 0)
  {
  	//create a file ID object
  	EnviFidClass fid;
  
      //set the file read/write mode
      fid.mode = mode;
  
      //set the mask (if specified)
  	fid.mask = mask;
  
  	// load the header file only while reading
  	if(mode=="r")
  	{
          //load the header file
          int error = fid.header.LoadHeader(filename);
  
          //if the LoadHeader function is not zero, the header is invalid
          if (error != 0)
          {
              fid.isValid = 0;
              return fid;
          }
  
  	}
  
  	//default header to be used in case of writing a file
  	else
  	{
  
  		fid.header.datatype= 4;
  		fid.header.nF= nBands;
  		fid.header.sX=0;
  		fid.header.sY=1;
  		fid.header.headersize=0;
  	}
      //load the binary file associated with this header
          //get the binary file name
  
  	 //find the binary file name
  
      //locate the position of the extension
      int pos = filename.find(".hdr");
      string binaryname = filename.substr(0, pos);
          //load the binary file using fopen()
          //store the resulting FILE pointer in the EnviFidClass variable
  	mode += "b";
  	fid.file = fopen (binaryname.c_str(), mode.c_str());
  	if(fid.file == NULL)
  	{
  		cout<<"Error opening binary file."<<endl;
  		fid.isValid = 0;
  		return fid;
  	}
  
  	//set the file name
  	fid.fileName = binaryname;
  
      fid.isValid = 1;
  	return fid;
  }
  
  static EnviFidClass EnviOpen(EnviFidClass fid, char* mask = NULL, string mode = "r")
  {
  	string filename = fid.fileName;
  	filename += ".hdr";
  
  	return EnviOpen(filename, mask, mode);
  }
  
  #endif