1 files changed, 51 insertions, 0 deletions
diff --git a/src/util/const_char_ptr.h b/src/util/const_char_ptr.h
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+++ b/src/util/const_char_ptr.h
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Provides `const_char_ptr`
+ */
+/*
+ * Authors:
+ *    Sergei Izmailov <sergei.a.izmailov@gmail.com>
+ *
+ * Copyright (C) 2020 Sergei Izmailov
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#ifndef SEEN_INKSCAPE_UTIL_CONST_CHAR_PTR_H
+#define SEEN_INKSCAPE_UTIL_CONST_CHAR_PTR_H
+#include <glibmm/ustring.h>
+#include <string>
+#include "share.h"
+
+namespace Inkscape {
+namespace Util {
+
+/**
+ * Non-owning reference to 'const char*'
+ * Main-purpose: avoid overloads of type `f(char*, str&)`, `f(str&, char*)`, `f(char*, char*)`, ...
+ */
+class const_char_ptr{
+public:
+    const_char_ptr() noexcept: m_data(nullptr){};
+    const_char_ptr(std::nullptr_t): const_char_ptr() {};
+    const_char_ptr(const char* const data) noexcept: m_data(data) {};
+    const_char_ptr(const Glib::ustring& str) noexcept: const_char_ptr(str.c_str()) {};
+    const_char_ptr(const std::string& str) noexcept: const_char_ptr(str.c_str()) {};
+    const_char_ptr(const ptr_shared& shared) : const_char_ptr(static_cast<const char*>(shared)) {};
+
+    const char * data() const noexcept { return m_data; }
+private:
+    const char * const m_data = nullptr;
+};
+}
+}
+#endif // SEEN_INKSCAPE_UTIL_CONST_CHAR_PTR_H
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace .0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim:filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99:
+\ No newline at end of file