71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
// index.cxx -- routines to handle a unique/persistant integer polygon index
|
|
//
|
|
// Written by Curtis Olson, started February 1999.
|
|
//
|
|
// Copyright (C) 1999 Curtis L. Olson - curt@flightgear.org
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program; if not, write to the Free Software
|
|
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
//
|
|
// $Id$
|
|
|
|
#include <Include/compiler.h>
|
|
|
|
#include STL_STRING
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "index.hxx"
|
|
|
|
|
|
static long int poly_index;
|
|
static string poly_path;
|
|
|
|
|
|
// initialize the unique polygon index counter stored in path
|
|
bool poly_index_init( string path ) {
|
|
poly_path = path;
|
|
|
|
FILE *fp = fopen( poly_path.c_str(), "r" );
|
|
|
|
if ( fp == NULL ) {
|
|
cout << "Error cannot open " << poly_path << endl;
|
|
poly_index = 0;
|
|
return false;
|
|
}
|
|
|
|
fscanf( fp, "%ld", &poly_index );
|
|
|
|
fclose( fp );
|
|
}
|
|
|
|
|
|
// increment the persistant counter and return the next poly_index
|
|
long int poly_index_next() {
|
|
++poly_index;
|
|
|
|
FILE *fp = fopen( poly_path.c_str(), "w" );
|
|
|
|
if ( fp == NULL ) {
|
|
cout << "Error cannot open " << poly_path << " for writing" << endl;
|
|
}
|
|
|
|
fprintf( fp, "%ld\n", poly_index );
|
|
|
|
fclose( fp );
|
|
|
|
return poly_index;
|
|
}
|
|
|
|
|