karm-io: Handle any string encoding in Fmt.

src/impls/impl-efi/sys.cpp

@@ -281,12 +281,13 @@ Res<Strong<Sys::Fd>> openFile(Mime::Url const &url) {
     }
 
     Efi::FileProtocol *file = nullptr;
-    auto resolved = try$(resolve(url));
+    auto resolved = try$(resolve(url)).str();
 
     _StringBuilder<Utf16> b;
     b.ensure(resolved.len());
+
     // NOTE: Convert '/' to '\' as EFI uses '\' as path separator
-    for (auto &u : iterRunes(resolved.str())) {
+    for (Rune u : iterRunes(resolved)) {
         if (u == '/') {
             u = '\\';
         }

src/kernel/hjert-core/object.cpp

@@ -10,7 +10,9 @@ void Object::label(Str label) {
 }
 
 String Object::label() const {
-    return _label ? *_label : "<no label>";
+    if (not _label)
+        return "<unlabeled>"s;
+    return *_label;
 }
 
 void Object::_signalUnlock(Flags<Hj::Sigs> set, Flags<Hj::Sigs> unset) {

src/libs/karm-base/string.h

@@ -260,7 +260,7 @@ struct _StringBuilder {
     }
 
     _String<E> take() {
-        usize len = _buf.size();
+        usize len = _buf.len();
         _buf.insert(len, 0);
         return {MOVE, _buf.take(), len};
     }

src/libs/karm-cli/style.h

@@ -141,7 +141,7 @@ struct Karm::Io::Formatter<Karm::Cli::Style> {
         usize written = 0;
 
         if (style._reset) {
-            written += try$(writer.writeStr("\x1b[0m"));
+            written += try$(writer.writeStr("\x1b[0m"s));
         }
 
         if (style._fg != Karm::Cli::_COLOR_UNDEF) {
@@ -153,23 +153,23 @@ struct Karm::Io::Formatter<Karm::Cli::Style> {
         }
 
         if (style._bold) {
-            written += try$(writer.writeStr("\x1b[1m"));
+            written += try$(writer.writeStr("\x1b[1m"s));
         }
 
         if (style._underline) {
-            written += try$(writer.writeStr("\x1b[4m"));
+            written += try$(writer.writeStr("\x1b[4m"s));
         }
 
         if (style._blink) {
-            written += try$(writer.writeStr("\x1b[5m"));
+            written += try$(writer.writeStr("\x1b[5m"s));
         }
 
         if (style._reverse) {
-            written += try$(writer.writeStr("\x1b[7m"));
+            written += try$(writer.writeStr("\x1b[7m"s));
         }
 
         if (style._invisible) {
-            written += try$(writer.writeStr("\x1b[8m"));
+            written += try$(writer.writeStr("\x1b[8m"s));
         }
 
         return Ok(written);
@@ -199,7 +199,7 @@ struct Karm::Io::Formatter<Karm::Cli::Styled<T>> {
         return Ok(
             try$(_styleFmt.format(writer, val._color)) +
             try$(_innerFmt.format(writer, val._inner)) +
-            try$(writer.writeStr("\x1b[0m"))
+            try$(writer.writeStr("\x1b[0m"s))
         );
 #else
         return _innerFmt.format(writer, val._inner);

src/libs/karm-io/emit.h

@@ -62,7 +62,7 @@ struct Emit : public Io::TextWriterBase<> {
         usize written = try$(_writer.writeRune('\n'));
         _newline = false;
         for (usize i = 0; i < _ident; i++)
-            written += try$(_writer.writeStr("    "));
+            written += try$(_writer.writeStr("    "s));
         return Ok(written);
     }