numberedfiles.cc

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///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  NumberedFiles.cc   Helper (base) class to read or write numbered files.  //
//                                                                           //
//  Derive a class from this one.  Give first filename (eg, video017.jpg)    //
//    as parameter to this base class's contructor.                          //
//                                                                           //
//  Author    : Nils T Siebel (nts)                                          //
//  Created   : Mon Apr  8 09:35:38 BST 2002                                 //
//  Revision  : 0.0 of Mon Apr  8 09:35:38 BST 2002                          //
//  Copyright : The University of Reading                                    //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "NumberedFiles.h"

#include <string.h>  // for strncpy() etc
#include <ctype.h>   // for isdigit()
#include <stdlib.h>  // for atol(...)

#include "text_output.h"  // for cerror

namespace ReadingPeopleTracker
{

static const char *NumberedFiles_Revision = "@(#) NumberedFiles.cc, rev 0.0 of Mon Apr  8 09:35:38 BST 2002, Author Nils T Siebel, Copyright (c) 2002 The University of Reading";

NumberedFiles::NumberedFiles(char *first_filename)
{
    // go through first_filename, separating out base, number, extension
    signed int pos;
    
    strncpy(current_filename, first_filename, 256+16+64-1);
    current_filename[256+16+64-1] = '\0';     // avoid overrun
    
    // set up file name(s)...
    for (pos = strlen(current_filename)-1; pos >= 0; pos--)
	if (isdigit(current_filename[pos]))
	    break;
    
    if (pos < 0)
    {
	cerror << "NumberedFiles::NumberedFiles: To use numbered files, please give first filename, like 籭nput017.jpg