dealth with precision issues (use unsigned long long int for file reading)

David Mayerich
1 parent ebe94c9d
Showing 2 changed files with 10 additions and 2 deletions Show diff stats
envi/binary.h
envi/bsq.h
@@ -18,7 +18,7 @@ protected:
 	std::fstream file;		//file stream used for reading and writing
 	std::string name;		//file name
  
-	unsigned int R[D];		//resolution
+	unsigned long long int R[D];		//resolution
 	unsigned int header;	//header size (in bytes)
 	unsigned char* mask;	//pointer to a character array: 0 = background, 1 = foreground (or valid data)
  
@@ -35,9 +35,15 @@ protected:
 	//returns the file size
 	//	reads the file size from disk and returns it (in bytes)
 	long long int get_file_size(){
+#ifdef _WIN32
 		struct _stat64 results;
 		if(_stat64(name.c_str(), &results) == 0)
 			return results.st_size;
+#else
+		struct stat results;
+		if(stat(name.c_str(), &results) == 0)
+			return results.st_size;
+#endif
 		else return 0;
 	}
  
@@ -48,7 +48,7 @@ public:
 			return false;
 		}
  
-		file.seekg(R[0] * R[1] * page * sizeof(T), std::ios::beg);
+		file.seekg(R[0] * R[1] * page * sizeof(T));
  
 		file.read((char *)p, sizeof(T) * R[0] * R[1]);
  
@@ -86,6 +86,7 @@ public:
 		}
 		//when the page counter points to the first band above 'wavelength'
 		if ( wavelength < w[page] ){
+
 			//do the interpolation
 			T * p1;
 			T * p2;
@@ -103,6 +104,7 @@ public:
 		//if the wavelength is equal to a wavelength in header file
 		else{
 			band_index(p, page);		//return the band
+			std::cout<<"wavelength: "<<wavelength<<"   w[page]: "<<w[page]<<std::endl;
 		}
  
 		return true;