1 files changed, 130 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/path/RTPathSplitReassemble.cpp b/src/VBox/Runtime/common/path/RTPathSplitReassemble.cpp
new file mode 100644
index 00000000..9987d2b9
--- /dev/null
+++ b/src/VBox/Runtime/common/path/RTPathSplitReassemble.cpp
@@ -0,0 +1,130 @@
+/* $Id: RTPathSplitReassemble.cpp $ */
+/** @file
+ * IPRT - RTPathSplitReassemble.
+ */
+
+/*
+ * Copyright (C) 2013-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.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, in version 3 of the
+ * License.
+ *
+ * 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, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "internal/iprt.h"
+#include <iprt/path.h>
+
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+RTDECL(int) RTPathSplitReassemble(PRTPATHSPLIT pSplit, uint32_t fFlags, char *pszDstPath, size_t cbDstPath)
+{
+    /*
+     * Input validation.
+     */
+    AssertPtrReturn(pSplit, VERR_INVALID_POINTER);
+    AssertReturn(pSplit->cComps > 0, VERR_INVALID_PARAMETER);
+    AssertReturn(RTPATH_STR_F_IS_VALID(fFlags, 0) && !(fFlags & RTPATH_STR_F_MIDDLE), VERR_INVALID_FLAGS);
+    AssertPtrReturn(pszDstPath, VERR_INVALID_POINTER);
+    AssertReturn(cbDstPath > pSplit->cchPath, VERR_BUFFER_OVERFLOW);
+
+    /*
+     * Figure which slash to use.
+     */
+    char chSlash;
+    switch (fFlags & RTPATH_STR_F_STYLE_MASK)
+    {
+        case RTPATH_STR_F_STYLE_HOST:
+            chSlash = RTPATH_SLASH;
+            break;
+
+        case RTPATH_STR_F_STYLE_DOS:
+            chSlash = '\\';
+            break;
+
+        case RTPATH_STR_F_STYLE_UNIX:
+            chSlash = '/';
+            break;
+
+        default:
+            AssertFailedReturn(VERR_INVALID_FLAGS); /* impossible */
+    }
+
+    /*
+     * Do the joining.
+     */
+    uint32_t const  cchOrgPath = pSplit->cchPath;
+    size_t          cchDstPath = 0;
+    uint32_t const  cComps     = pSplit->cComps;
+    uint32_t        idxComp    = 0;
+    char           *pszDst     = pszDstPath;
+    size_t          cchComp;
+
+    if (RTPATH_PROP_HAS_ROOT_SPEC(pSplit->fProps))
+    {
+        cchComp = strlen(pSplit->apszComps[0]);
+        cchDstPath += cchComp;
+        AssertReturn(cchDstPath <= cchOrgPath, VERR_INVALID_PARAMETER);
+        memcpy(pszDst, pSplit->apszComps[0], cchComp);
+
+        /* fix the slashes */
+        char chOtherSlash = chSlash == '\\' ? '/' : '\\';
+        while (cchComp-- > 0)
+        {
+            if (*pszDst == chOtherSlash)
+                *pszDst = chSlash;
+            pszDst++;
+        }
+        idxComp = 1;
+    }
+
+    while (idxComp < cComps)
+    {
+        cchComp = strlen(pSplit->apszComps[idxComp]);
+        cchDstPath += cchComp;
+        AssertReturn(cchDstPath <= cchOrgPath, VERR_INVALID_PARAMETER);
+        memcpy(pszDst, pSplit->apszComps[idxComp], cchComp);
+        pszDst += cchComp;
+        idxComp++;
+        if (idxComp != cComps || (pSplit->fProps & RTPATH_PROP_DIR_SLASH))
+        {
+            cchDstPath++;
+            AssertReturn(cchDstPath <= cchOrgPath, VERR_INVALID_PARAMETER);
+            *pszDst++ = chSlash;
+        }
+    }
+
+    *pszDst = '\0';
+
+    return VINF_SUCCESS;
+}
+