--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dep/fmt/test/util.cc	Thu Jun 20 05:56:06 2024 -0400
@@ -0,0 +1,50 @@
+// Formatting library for C++ - test utilities
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "util.h"
+
+#include <cstring>
+
+const char* const file_content = "Don't panic!";
+
+fmt::buffered_file open_buffered_file(FILE** fp) {
+#if FMT_USE_FCNTL
+  fmt::file read_end, write_end;
+  fmt::file::pipe(read_end, write_end);
+  write_end.write(file_content, std::strlen(file_content));
+  write_end.close();
+  fmt::buffered_file f = read_end.fdopen("r");
+  if (fp) *fp = f.get();
+#else
+  fmt::buffered_file f("test-file", "w");
+  fputs(file_content, f.get());
+  if (fp) *fp = f.get();
+#endif
+  return f;
+}
+
+std::locale do_get_locale(const char* name) {
+  try {
+    return std::locale(name);
+  } catch (const std::runtime_error&) {
+  }
+  return std::locale::classic();
+}
+
+std::locale get_locale(const char* name, const char* alt_name) {
+  auto loc = do_get_locale(name);
+  if (loc == std::locale::classic() && alt_name)
+    loc = do_get_locale(alt_name);
+#ifdef __OpenBSD__
+    // Locales are not working in OpenBSD:
+    // https://github.com/fmtlib/fmt/issues/3670.
+    loc = std::locale::classic();
+#endif
+  if (loc == std::locale::classic())
+    fmt::print(stderr, "{} locale is missing.\n", name);
+  return loc;
+}