a47a23a9
 dmayerich
added ENVI functions
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#ifndef ENVIHEADER_H
#define ENVIHEADER_H
#include <string>
#include <iostream>
#include <fstream>
#include <ctime>
#include <sstream>
using namespace std;
enum InterleaveType {bip, bil, bsq};
class EnviHeaderClass //"EnviheaderClass" will be used to store data into variables sX, sY, etc.
{
public:
unsigned int sX; //samples = "sX"
unsigned int sY; //lines = "sY"
unsigned int nF; //bands = "nF"
unsigned int headersize; //header offset = "headersize"
unsigned int datatype; //data type = "datatype"
InterleaveType type;
string units; //wavelength units = "units" (Usully in Wavenumber or Wavelength)
int LoadHeader(string filename)
{
ifstream inFile;
//Load the header file in the same directory, for future note, might want to modify code to either "cin" the file name of have a feature in the GUI which take into account different fileneames
inFile.open (filename.c_str());
//If or not there is a file
if (!inFile)
{
cout<<"Error"<<endl;
return 1;
}
string line;
getline(inFile,line);
//If the 1st line of text file does not read ENVI, spit out an error.
if (line.compare("ENVI"))
{
cout<<"Error, not an ENVI file"<<endl;
return 1;
}
while(inFile) //Loops through entire file
{
getline(inFile,line);
if(line.find("samples")==0)
{
sX=getNumber(line); //Calls getNumber function for "samples", stores in header.sX
}
if(line.find("lines")==0)
{
sY=getNumber(line); //Calls getNumber function for "lines", stores in header.sY
}
if(line.find("bands")==0)
{
nF=getNumber(line); //Calls getNumber function for "bands", stores in header.nF
}
if(line.find("header offset")==0)
{
headersize=getNumber(line); //Calls getNumber function for "header offset", stores in header.headersize
}
if(line.find("data type")==0)
{
datatype=getNumber(line); //Calls getNumber function for "data type", stores in header.datatype
}
line.find("interleave");
if(line.find("interleave")==0)
{
string typeStr;
typeStr=getString(line);
if (typeStr.find("bip")==0)
type=bip;
else if(typeStr.find("bsq")==0)
type=bsq;
else if(typeStr.find("bil")==0)
type=bil;
else
{
//throw an error and exit
cout<<"Type not recognized"<<endl;
return 1;
}
}
if(line.find("wavelength units")==0)
{
//Calls getString function for "wavelength units", stores in header.units
units=getString(line);
}
}
return 0;
}
private:
//retrieves a numerical parameter from a line of text
int getNumber(string line)
{
int result=0;
int position;
position=line.find("="); //Finds the position of the equal sign
string numStr; //Creates a string for storing data called "numStr"
numStr=line.substr(position+2); //Moves from the position of "=" 2 spaces to the right...
istringstream convert(numStr); //...and converts the string into numbers using "istringstream"
convert>>result; //converts result from previous line
return result;
}
//retrieves a string parameter from a line of text
string getString(string line)
{
int position;
position=line.find("="); //Finds the position of the equal sign
string word; //Creates a string for storing word data called "word"
word=line.substr(position+2); //Moves from the position of "=" 2 spaces to the right
//Note: We do not need to convert word using "istringstream"
return word;
}
};
#endif
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