Drop libfmt

We can use std::format() and a custom print() wrapper with C++20. When
moving to C++23, we can drop the wrapper.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/kms++/inc/kms++/format.h b/kms++/inc/kms++/format.h
new file mode 100644
index 0000000..b48babe
--- /dev/null
+++ b/kms++/inc/kms++/format.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include <cstdio>
+#include <format>
+#include <string>
+
+// This can be removed when moving to C++23. For now, this gives us
+// fmt::format() and fmt::print().
+
+namespace fmt {
+
+using std::format;
+
+template<typename... Args>
+void print(std::format_string<Args...> fmtstr, Args&&... args)
+{
+	std::string s = std::format(fmtstr, std::forward<Args>(args)...);
+	std::fwrite(s.data(), 1, s.size(), stdout);
+}
+
+template<typename... Args>
+void print(std::FILE* f, std::format_string<Args...> fmtstr, Args&&... args)
+{
+	std::string s = std::format(fmtstr, std::forward<Args>(args)...);
+	std::fwrite(s.data(), 1, s.size(), f);
+}
+
+} // namespace fmt