io/Reader: use std::span

src/decoder/Reader.cxx

@@ -4,8 +4,8 @@
 #include "Reader.hxx"
 #include "DecoderAPI.hxx"
 
-size_t
-DecoderReader::Read(void *data, size_t size)
+std::size_t
+DecoderReader::Read(std::span<std::byte> dest)
 {
-	return decoder_read(client, is, data, size);
+	return decoder_read(client, is, dest.data(), dest.size());
 }

src/decoder/Reader.hxx

@@ -30,7 +30,7 @@ public:
 	}
 
 	/* virtual methods from class Reader */
-	size_t Read(void *data, size_t size) override;
+	std::size_t Read(std::span<std::byte> dest) override;
 };
 
 #endif

src/decoder/plugins/SidplayDecoderPlugin.cxx

@@ -60,7 +60,7 @@ static constexpr unsigned rom_size = 8192;
 static void loadRom(const Path rom_path, uint8_t *dump)
 {
 	FileReader romDump(rom_path);
-	if (romDump.Read(dump, rom_size) != rom_size)
+	if (romDump.Read(std::as_writable_bytes(std::span{dump, rom_size})) != rom_size)
 		throw FmtRuntimeError("Could not load rom dump '{}'", rom_path);
 }