New o3tl::runtimeToOUString to convert from C++ runtime NTBS to OUString

Change-Id: I613bb70b6828f615fd45af38b2d873ece55ace60
(cherry picked from commit d689ad29c28ad7f077c2239a8fa4c2b6307a6aa1)
Reviewed-on: https://gerrit.libreoffice.org/71591
Reviewed-by: Michael Stahl <Michael.Stahl@cib.de>
Tested-by: Michael Stahl <Michael.Stahl@cib.de>

1 files changed, 48 insertions, 0 deletions

diff --git a/include/o3tl/runtimetooustring.hxx b/include/o3tl/runtimetooustring.hxx
new file mode 100644
index 000000000000..7f2015805722
--- /dev/null
+++ b/include/o3tl/runtimetooustring.hxx
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_O3TL_RUNTIMETOOUSTRING_HXX
+#define INCLUDED_O3TL_RUNTIMETOOUSTRING_HXX
+
+#include <sal/config.h>
+
+#include <cassert>
+#include <cstring>
+
+#include <rtl/textcvt.h>
+#include <rtl/textenc.h>
+#include <rtl/ustring.h>
+#include <rtl/ustring.hxx>
+
+namespace o3tl {
+
+/** Convert an NTBS from the C++ runtime to an OUString.
+
+    This is used to convert an NTBS as provided by std::exception::what or
+    std::type_info::name into an OUString in a "lossless" way.  The conversion
+    is done using RTL_TEXTENCODING_ISO_8859_1, so each char in the input maps
+    to one Unicode character in the output.
+*/
+inline OUString runtimeToOUString(char const * runtimeString) {
+    OUString s;
+    bool ok = rtl_convertStringToUString(
+        &s.pData, runtimeString, std::strlen(runtimeString),
+        RTL_TEXTENCODING_ISO_8859_1,
+        (RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR
+         | RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR
+         | RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR));
+    assert(ok); (void) ok;
+    return s;
+}
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */