thodg/libgit2

diff --git a/include/git2/odb.h b/include/git2/odb.h
index b3e9a57..3e93a93 100644
--- a/include/git2/odb.h
+++ b/include/git2/odb.h
@@ -219,16 +219,9 @@ GIT_EXTERN(int) git_odb_write(git_oid *out, git_odb *odb, const void *data, size
  * The type and final length of the object must be specified
  * when opening the stream.
  *
- * The returned stream will be of type `GIT_STREAM_WRONLY` and
- * will have the following methods:
- *
- *		- stream->write: write `n` bytes into the stream
- *		- stream->finalize_write: close the stream and store the object in
- *			the odb
- *		- stream->free: free the stream
- *
- * The streaming write won't be effective until `stream->finalize_write`
- * is called and returns without an error
+ * The returned stream will be of type `GIT_STREAM_WRONLY`, and it
+ * won't be effective until `git_odb_stream_finalize_write` is called
+ * and returns without an error
  *
  * The stream must always be free'd or will leak memory.
  *
@@ -243,6 +236,42 @@ GIT_EXTERN(int) git_odb_write(git_oid *out, git_odb *odb, const void *data, size
 GIT_EXTERN(int) git_odb_open_wstream(git_odb_stream **out, git_odb *db, size_t size, git_otype type);
 
 /**
+ * Write to an odb stream
+ *
+ * @param stream the stream
+ * @param buffer the data to write
+ * @param len the buffer's length
+ * @return 0 if the write succeeded; error code otherwise
+ */
+GIT_EXTERN(int) git_odb_stream_write(git_odb_stream *stream, const char *buffer, size_t len);
+
+/**
+ * Finish writing to an odb stream
+ *
+ * The object will take its final name and will be available to the
+ * odb.
+ *
+ * @param out pointer to store the resulting object's id
+ * @param stream the stream
+ * @return 0 on success; an error code otherwise
+ */
+GIT_EXTERN(int) git_odb_stream_finalize_write(git_oid *out, git_odb_stream *stream);
+
+/**
+ * Read from an odb stream
+ *
+ * Most backends don't implement streaming reads
+ */
+GIT_EXTERN(int) git_odb_stream_read(git_odb_stream *stream, char *buffer, size_t len);
+
+/**
+ * Free an odb stream
+ *
+ * @param stream the stream to free
+ */
+GIT_EXTERN(void) git_odb_stream_free(git_odb_stream *stream);
+
+/**
  * Open a stream to read an object from the ODB
  *
  * Note that most backends do *not* support streaming reads
diff --git a/src/blob.c b/src/blob.c
index 5bb51f7..6a289f4 100644
--- a/src/blob.c
+++ b/src/blob.c
@@ -60,10 +60,10 @@ int git_blob_create_frombuffer(git_oid *oid, git_repository *repo, const void *b
 		(error = git_odb_open_wstream(&stream, odb, len, GIT_OBJ_BLOB)) < 0)
 		return error;
 
-	if ((error = stream->write(stream, buffer, len)) == 0)
-		error = stream->finalize_write(oid, stream);
+	if ((error = git_odb_stream_write(stream, buffer, len)) == 0)
+		error = git_odb_stream_finalize_write(oid, stream);
 
-	stream->free(stream);
+	git_odb_stream_free(stream);
 	return error;
 }
 
@@ -80,12 +80,12 @@ static int write_file_stream(
 		return error;
 
 	if ((fd = git_futils_open_ro(path)) < 0) {
-		stream->free(stream);
+		git_odb_stream_free(stream);
 		return -1;
 	}
 
 	while (!error && (read_len = p_read(fd, buffer, sizeof(buffer))) > 0) {
-		error = stream->write(stream, buffer, read_len);
+		error = git_odb_stream_write(stream, buffer, read_len);
 		written += read_len;
 	}
 
@@ -97,9 +97,9 @@ static int write_file_stream(
 	}
 
 	if (!error)
-		error = stream->finalize_write(oid, stream);
+		error = git_odb_stream_finalize_write(oid, stream);
 
-	stream->free(stream);
+	git_odb_stream_free(stream);
 	return error;
 }
 
diff --git a/src/odb.c b/src/odb.c
index 6969cf7..1581596 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -864,9 +864,9 @@ int git_odb_write(
 	if ((error = git_odb_open_wstream(&stream, db, len, type)) != 0)
 		return error;
 
-	stream->write(stream, data, len);
-	error = stream->finalize_write(oid, stream);
-	stream->free(stream);
+	git_odb_stream_write(stream, data, len);
+	error = git_odb_stream_finalize_write(oid, stream);
+	git_odb_stream_free(stream);
 
 	return error;
 }
@@ -904,6 +904,26 @@ int git_odb_open_wstream(
 	return error;
 }
 
+int git_odb_stream_write(git_odb_stream *stream, const char *buffer, size_t len)
+{
+	return stream->write(stream, buffer, len);
+}
+
+int git_odb_stream_finalize_write(git_oid *out, git_odb_stream *stream)
+{
+	return stream->finalize_write(out, stream);
+}
+
+int git_odb_stream_read(git_odb_stream *stream, char *buffer, size_t len)
+{
+	return stream->read(stream, buffer, len);
+}
+
+void git_odb_stream_free(git_odb_stream *stream)
+{
+	stream->free(stream);
+}
+
 int git_odb_open_rstream(git_odb_stream **stream, git_odb *db, const git_oid *oid)
 {
 	size_t i, reads = 0;
diff --git a/src/tag.c b/src/tag.c
index 71f4c1e..31a3c8b 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -366,10 +366,10 @@ int git_tag_create_frombuffer(git_oid *oid, git_repository *repo, const char *bu
 	if (git_odb_open_wstream(&stream, odb, strlen(buffer), GIT_OBJ_TAG) < 0)
 		return -1;
 
-	stream->write(stream, buffer, strlen(buffer));
+	git_odb_stream_write(stream, buffer, strlen(buffer));
 
-	error = stream->finalize_write(oid, stream);
-	stream->free(stream);
+	error = git_odb_stream_finalize_write(oid, stream);
+	git_odb_stream_free(stream);
 
 	if (error < 0) {
 		git_buf_free(&ref_name);
diff --git a/src/transports/local.c b/src/transports/local.c
index a9da814..8a75de7 100644
--- a/src/transports/local.c
+++ b/src/transports/local.c
@@ -287,9 +287,9 @@ static int local_push_copy_object(
 		odb_obj_size, odb_obj_type)) < 0)
 		goto on_error;
 
-	if (odb_stream->write(odb_stream, (char *)git_odb_object_data(odb_obj),
+	if (git_odb_stream_write(odb_stream, (char *)git_odb_object_data(odb_obj),
 		odb_obj_size) < 0 ||
-		odb_stream->finalize_write(&remote_odb_obj_oid, odb_stream) < 0) {
+		git_odb_stream_finalize_write(&remote_odb_obj_oid, odb_stream) < 0) {
 		error = -1;
 	} else if (git_oid__cmp(&obj->id, &remote_odb_obj_oid) != 0) {
 		giterr_set(GITERR_ODB, "Error when writing object to remote odb "
@@ -298,7 +298,7 @@ static int local_push_copy_object(
 		error = -1;
 	}
 
-	odb_stream->free(odb_stream);
+	git_odb_stream_free(odb_stream);
 
 on_error:
 	git_odb_object_free(odb_obj);
diff --git a/tests-clar/object/raw/write.c b/tests-clar/object/raw/write.c
index 9709c03..273f08f 100644
--- a/tests-clar/object/raw/write.c
+++ b/tests-clar/object/raw/write.c
@@ -31,9 +31,9 @@ static void streaming_write(git_oid *oid, git_odb *odb, git_rawobj *raw)
    int error;
 
    cl_git_pass(git_odb_open_wstream(&stream, odb, raw->len, raw->type));
-   stream->write(stream, raw->data, raw->len);
-   error = stream->finalize_write(oid, stream);
-   stream->free(stream);
+   git_odb_stream_write(stream, raw->data, raw->len);
+   error = git_odb_stream_finalize_write(oid, stream);
+   git_odb_stream_free(stream);
    cl_git_pass(error);
 }