1 files changed, 102 insertions, 0 deletions
diff --git a/src/VBox/Runtime/generic/RTDirCreateUniqueNumbered-generic.cpp b/src/VBox/Runtime/generic/RTDirCreateUniqueNumbered-generic.cpp
new file mode 100644
index 000000000..7a9c378b5
--- /dev/null
+++ b/src/VBox/Runtime/generic/RTDirCreateUniqueNumbered-generic.cpp
@@ -0,0 +1,102 @@
+/* $Id: RTDirCreateUniqueNumbered-generic.cpp 36604 2011-04-06 23:02:52Z vboxsync $ */
+/** @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);
+    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);
+        if (RT_SUCCESS(rc))
+            return rc;
+        ++i;
+    }
+
+    /* We've given up. */
+    *pszPath = '\0';
+    return VERR_ALREADY_EXISTS;
+}
+RT_EXPORT_SYMBOL(RTDirCreateUniqueNumbered);
+