1 files changed, 133 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/RTStrSplit.cpp b/src/VBox/Runtime/common/string/RTStrSplit.cpp
new file mode 100644
index 00000000..80d8837a
--- /dev/null
+++ b/src/VBox/Runtime/common/string/RTStrSplit.cpp
@@ -0,0 +1,133 @@
+/* $Id: RTStrSplit.cpp $ */
+/** @file
+ * IPRT - RTStrSplit.
+ */
+
+/*
+ * Copyright (C) 2020-2023 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 <iprt/mem.h>
+#include <iprt/string.h>
+#include "internal/iprt.h"
+
+
+RTDECL(int) RTStrSplit(const char *pcszStrings, size_t cbStrings,
+                       const char *pcszSeparator, char ***ppapszStrings, size_t *pcStrings)
+{
+    AssertPtrReturn(pcszStrings, VERR_INVALID_POINTER);
+    AssertReturn(cbStrings, VERR_INVALID_PARAMETER);
+    AssertPtrReturn(pcszSeparator, VERR_INVALID_POINTER);
+    AssertPtrReturn(ppapszStrings, VERR_INVALID_POINTER);
+    AssertPtrReturn(pcStrings, VERR_INVALID_POINTER);
+
+    size_t cStrings = 0;
+
+    /* Determine the number of paths in buffer first. */
+    size_t      cch     = cbStrings - 1;
+    char const *pcszTmp = pcszStrings;
+    const char *pcszEnd = RTStrEnd(pcszTmp, RTSTR_MAX);
+    char const *pcszNext;
+    const size_t cchSep = strlen(pcszSeparator);
+          size_t cchNext;
+    while (cch > 0)
+    {
+        pcszNext = RTStrStr(pcszTmp, pcszSeparator);
+        if (!pcszNext)
+            break;
+        cchNext = pcszNext - pcszTmp;
+        if (cchNext + cchSep > cch)
+            break;
+        pcszNext += cchSep;
+        pcszTmp  += cchNext + cchSep;
+        cch      -= cchNext + cchSep;
+        if (cchNext)
+            ++cStrings;
+    }
+
+    if (pcszTmp != pcszEnd) /* Do we need to take a trailing string without separator into account? */
+        cStrings++;
+
+    if (!cStrings)
+    {
+        *ppapszStrings = NULL;
+        *pcStrings     = 0;
+        return VINF_SUCCESS;
+    }
+
+    char **papszStrings = (char **)RTMemAllocZ(cStrings * sizeof(char *));
+    if (!papszStrings)
+        return VERR_NO_MEMORY;
+
+    int rc = VINF_SUCCESS;
+
+    cch    = cbStrings - 1;
+    pcszTmp = pcszStrings;
+
+    for (size_t i = 0; i < cStrings;)
+    {
+        pcszNext = RTStrStr(pcszTmp, pcszSeparator);
+        if (!pcszNext)
+            pcszNext = pcszEnd;
+        cchNext = pcszNext - pcszTmp;
+        if (cchNext)
+        {
+            papszStrings[i] = RTStrDupN(pcszTmp, cchNext);
+            if (!papszStrings[i])
+            {
+                rc = VERR_NO_MEMORY;
+                break;
+            }
+            i++;
+        }
+        pcszTmp += cchNext + cchSep;
+        cch     -= cchNext + cchSep;
+    }
+
+    if (RT_SUCCESS(rc))
+    {
+        *ppapszStrings = papszStrings;
+        *pcStrings     = cStrings;
+
+        return VINF_SUCCESS;
+    }
+
+    for (size_t i = 0; i < cStrings; ++i)
+        RTStrFree(papszStrings[i]);
+    RTMemFree(papszStrings);
+
+    return rc;
+}
+RT_EXPORT_SYMBOL(RTStrSplit);
+