initial commit

include/sedpp/StringUtil.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <string>
+
+namespace sedpp {
+
+// Minimal POSIX-style path helpers used by command-line and file-output code.
+// They intentionally avoid filesystem canonicalization so sed path strings stay
+// close to what the user supplied.
+[[nodiscard]] bool isAbsolutePath(const std::string &path);
+[[nodiscard]] std::string basenameOf(const std::string &path);
+[[nodiscard]] std::string joinPath(const std::string &directory,
+                                   const std::string &name);
+
+} // namespace sedpp