Переписан для обычного diff

source/libxdiff/mmfile.d

@@ -0,0 +1,79 @@
+module libxdiff.mmfile;
+
+import xdiff;
+
+import libxdiff.init;
+import libxdiff.mmblocks;
+
+import std.exception : enforce;
+import core.stdc.errno : errno;
+import core.stdc.string : strerror;
+import std.string : fromStringz;
+import std.conv : to;
+import std.string : join, representation;
+
+final class MMFile : MM
+{
+private:
+	void _write(ByteArray data)
+	{
+		_inner = initMmfile(0);
+
+		if (data.length > 0)
+		{
+			auto length = data.length.to!long;
+			auto wrote = xdl_write_mmfile(&_inner, data.ptr, length);
+			enforce(wrote == length,
+				"xdl_write_mmfile wrote less than requested: " ~ strerror(errno).fromStringz);
+		}
+	}
+
+public:
+	this(ByteArray data)
+	{
+		_write(data);
+	}
+
+	this(string data)
+	{
+		_write(data.representation);
+	}
+
+	this(string[] data)
+	{
+		_write(data.join('\n').representation);
+	}
+
+	~this()
+	{
+		if (_inner.head !is null)
+			xdl_free_mmfile(&_inner);
+	}
+
+	MMBlocks computePatch(ref MMFile other, long ctxlen = 3)
+	{
+		auto patch = new MMBlocks();
+
+		extern (C) int emitToPatch(void* priv, mmbuffer_t* bufs, int num)
+		{
+			auto target = cast(MMBlocks) priv;
+			foreach (i; 0 .. num)
+			{
+				mmbuffer_t* buf = &bufs[i];
+				long written = xdl_writem_mmfile(target.ptr(), buf, 1);
+				if (written < 0 || written != buf.size)
+					return -1;
+			}
+			return 0;
+		}
+
+		xpparam_t xpp = {0};
+		xdemitconf_t xec = {ctxlen};
+		xdemitcb_t ecb = {cast(void*) patch, &emitToPatch};
+
+		enforce(xdl_diff(&_inner, &other._inner, &xpp, &xec, &ecb) == 0,
+			"xdl_diff failed: " ~ strerror(errno).fromStringz);
+
+		return patch;
+	}
+}