1 files changed, 58 insertions, 0 deletions
diff --git a/cmd/convert/convert.ha b/cmd/convert/convert.ha
new file mode 100644
index 0000000..807ae7f
--- /dev/null
+++ b/cmd/convert/convert.ha
@@ -0,0 +1,58 @@
+use fmt;
+
+use cmd;
+use mbr;
+use gpt;
+use sector;
+
+use os;
+use io;
+use fs;
+use strings;
+use errors;
+use rt;
+
+export fn convert(vol: str, args: []str) void = {
+	if (len(args) < 2) {
+		fmt::fatalf("convert: needs disk");
+	};
+
+	let source = os::open(args[1], fs::flags::RDONLY)!;
+	defer io::close(source)!;
+
+	const source = mbr::from(source)!;
+
+	const vol = cmd::openvol(vol);
+	let vol = gpt::from(vol)!;
+	defer {
+		gpt::chksums(vol);
+		gpt::commit(vol)!;
+		gpt::finish(vol);
+	};
+
+	rt::memcpy(vol.mbr, source.bootsector, size(mbr::bootsector));	
+	for (let i = 0z; i < 4; i += 1) {
+		const entry = &source.bootsector.entries[i];
+		if (entry.lba_begin == 0 && entry.length == 0)
+			continue;
+
+		const reader = mbr::partstream_reader(source, entry)!;
+		const partlength = entry.length;
+
+		const part = gpt::allocate(vol, partlength) as *gpt::entry;
+
+		const writer = gpt::partstream_writer(vol, part)!;
+
+		io::copy(&writer, &reader)!;
+
+		vol.mbr.entries[i].lba_begin = part.lba_begin: u32;
+		vol.mbr.entries[i].length = (part.lba_end - part.lba_begin + 1): u32;
+	};
+
+	vol.mbr.entries[3] = mbr::entry {
+		part_type = 0xEE,
+		lba_begin = 0,
+		length = -1: u32,
+		...
+	};
+};