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/* $Id: RTDirCreateUniqueNumbered-generic.cpp $ */
/** @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, signed int cchDigits, char chSep)
{
/*
* Validate input.
*/
AssertPtrReturn(pszPath, VERR_INVALID_POINTER);
AssertReturn(cbSize, VERR_BUFFER_OVERFLOW);
AssertReturn(cchDigits > 0, VERR_INVALID_PARAMETER);
/* Check that there is sufficient space. */
char *pszEnd = RTStrEnd(pszPath, cbSize);
AssertReturn(pszEnd, VERR_BUFFER_OVERFLOW);
AssertReturn(cbSize - 1 - (pszEnd - pszPath) >= (size_t)cchDigits + (chSep ? 1 : 0), VERR_BUFFER_OVERFLOW);
size_t cbLeft = cbSize - (pszEnd - pszPath);
/* First try is to create the path without any numbers. */
int rc = RTDirCreate(pszPath, fMode, 0);
if ( RT_SUCCESS(rc)
|| rc != VERR_ALREADY_EXISTS)
return rc;
/* If the separator value isn't zero, add it. */
if (chSep != '\0')
{
cbLeft--;
*pszEnd++ = chSep;
*pszEnd = '\0';
}
/* How many tries? Stay within somewhat sane limits. */
uint32_t cMaxTries;
if (cchDigits >= 8)
cMaxTries = 100 * _1M;
else
{
cMaxTries = 10;
for (int a = 0; a < cchDigits - 1; ++a)
cMaxTries *= 10;
}
/* Try cMaxTries - 1 times to create a directory with appended numbers. */
uint32_t i = 1;
while (i < cMaxTries)
{
/* Format the number with leading zero's. */
ssize_t rc2 = RTStrFormatU32(pszEnd, cbLeft, i, 10, cchDigits, 0, RTSTR_F_WIDTH | RTSTR_F_ZEROPAD);
if (RT_FAILURE((int) rc2))
{
*pszPath = '\0';
return (int)rc2;
}
rc = RTDirCreate(pszPath, fMode, 0);
if (RT_SUCCESS(rc))
return rc;
++i;
}
/* We've given up. */
*pszPath = '\0';
return VERR_ALREADY_EXISTS;
}
RT_EXPORT_SYMBOL(RTDirCreateUniqueNumbered);
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