binary import/export for SLF

include/Algo/Export/export.hpp

@@ -530,9 +530,13 @@ bool exportPlySLFgenericBin(typename PFP::MAP& map, const typename PFP::TVEC3& p
 	size_t pos = file.rfind(".") ; // position of "." in filename
 	std::string extension = file.substr(pos) ;
 
+	std::string tmp ;
+	tmp = std::string("ply") ;
+	out.write(tmp,tmp.length()*sizeof(char)) ;
+	tmp = std::string("format binary_little_endian 1.0") ;
+	out.write(tmp,tmp.length()*sizeof(char)) ;
+
 	std::stringstream header ;
-	header << "ply" << std::endl ;
-	header << "format binary_little_endian 1.0" << std::endl ;
 	header << "comment ply SLF (K. Vanhoey generic format): SLF_" << ((extension == ".plyPTMext") ? "PTMext" : "SHreal") << std::endl ;
 	header << "element vertex " << vertices.size() << std::endl ;
 	header << "property float x" << std::endl ;

include/Algo/Import/import2tablesSurface.hpp

@@ -805,25 +805,28 @@ bool MeshTablesSurface<PFP>::importPlySLFgenericBin(const std::string& filename,
 		return false ;
 	}
 
+	// read "ply"
+	char* buff = new char[3] ;
+	fp.read(buff, 3) ;
+	std::string tag(buff) ;
+	delete[] buff ;
+	if (tag != std::string("ply")) // verify file type
+	{
+		CGoGNerr << filename << " is not a ply file !" <<  CGoGNout ;
+		return false ;
+	}
+
 	// read CHNum
 	unsigned int CHNum ;
 	fp.read((char*)&CHNum, sizeof(unsigned int)) ;
 
 	char* headerTab = new char[CHNum] ;
-	std::cout << fp.read(headerTab, CHNum) << std::endl ;
+	fp.read(headerTab, CHNum) ;
 
 	std::stringstream header(headerTab) ;
 	std::cout << std::string(headerTab) << std::endl ;
 
 	// Read quantities : #vertices, #faces, #properties, degree of polynomials
-    std::string tag ;
-
-    header >> tag ;
-	if (tag != std::string("ply")) // verify file type
-	{
-		CGoGNerr << filename << " is not a ply file !" <<  CGoGNout ;
-		return false ;
-	}
 
 	do // go to #vertices
 	{