commit 2cc8be3edd3d88ead31b1132d8c5a9eee9283f72
Author: Daniel Swanson <popcorn.tomato.dude@gmail.com>
Date:   Thu Jun 17 10:11:40 2021 -0500

    make to_ustring() use unsigned chars

diff --git a/lttoolbox/ustring.cc b/lttoolbox/ustring.cc
index e8d4777..87056c2 100644
--- a/lttoolbox/ustring.cc
+++ b/lttoolbox/ustring.cc
@@ -34,7 +34,13 @@ write(const UString& str, UFILE* output)
 UString
 to_ustring(const char* s)
 {
-  auto sz = strlen(s);
+  return to_ustring(reinterpret_cast<const uint8_t*>(s));
+}
+
+UString
+to_ustring(const uint8_t* s)
+{
+  auto sz = strlen(reinterpret_cast<const char*>(s));
   UString ret;
   ret.reserve(sz);
   utf8::utf8to16(s, s+sz, std::back_inserter(ret));
diff --git a/lttoolbox/ustring.h b/lttoolbox/ustring.h
index 548fc51..7068e28 100644
--- a/lttoolbox/ustring.h
+++ b/lttoolbox/ustring.h
@@ -28,8 +28,8 @@ typedef std::basic_string<UChar> UString;
 
 void write(const UString& str, UFILE* output);
 
-// for command-line arguments
 UString to_ustring(const char* str);
+UString to_ustring(const uint8_t* str);
 
 // append UTF-16 string to UTF-32 vector of symbols
 void ustring_to_vec32(const UString& str, std::vector<int32_t>& vec);