RTDirCreateUniqueNumbered-generic.cpp revision 816ac74e92ca80219a256c3f3581edd2a62a2d64
/* $Id$ */
/** @file
* IPRT - RTDirCreateUniqueNumbered, generic implementation.
*/
/*
* Copyright (C) 2011 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/dir.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/path.h>
#include <iprt/string.h>
RTDECL(int) RTDirCreateUniqueNumbered(char *pszPath, size_t cbSize, RTFMODE fMode, size_t cchDigits, char chSep)
{
/*
* Validate input.
*/
AssertPtrReturn(pszPath, VERR_INVALID_POINTER);
AssertReturn(cbSize, VERR_INVALID_PARAMETER);
AssertReturn(cchDigits, VERR_INVALID_PARAMETER);
/* Check for enough space. */
char *pszEnd = strchr(pszPath, '\0');
AssertReturn(cbSize - 1 - (pszEnd - pszPath) >= cchDigits + (chSep ? 1 : 0), VERR_BUFFER_OVERFLOW);
/* First try is to create the path without any numbers. */
int rc = RTDirCreate(pszPath, fMode);
if ( RT_SUCCESS(rc)
|| rc != VERR_ALREADY_EXISTS)
return rc;
/* If the separator value isn't zero, add it. */
if (chSep != '\0')
{
*pszEnd++ = chSep;
*pszEnd = '\0';
}
/* How many tries? */
size_t cMaxTries = 10;
for (size_t i = 0; i < cchDigits - 1; ++i)
cMaxTries *= 10;
/* Try cMaxTries - 1 counts to create a directory with the appended number. */
size_t i = 1;
while (i < cMaxTries)
{
/* Format the number with leading zero's. */
rc = RTStrFormatNumber(pszEnd, i, 10, cchDigits, 0, RTSTR_F_WIDTH | RTSTR_F_ZEROPAD);
if (RT_FAILURE(rc))
{
*pszPath = '\0';
return rc;
}
rc = RTDirCreate(pszPath, fMode);
if (RT_SUCCESS(rc))
return rc;
++i;
}
/* We've given up. */
*pszPath = '\0';
return VERR_ALREADY_EXISTS;
}
RT_EXPORT_SYMBOL(RTDirCreateUniqueNumbered);