1 files changed, 67 insertions, 0 deletions
diff --git a/lib/io/xfrm.c b/lib/io/xfrm.c
new file mode 100644
index 0000000..22fd953
--- /dev/null
+++ b/lib/io/xfrm.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * compressor.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "internal.h"
+
+int io_compressor_id_from_name(const char *name)
+{
+	if (strcmp(name, "gzip") == 0)
+		return IO_COMPRESSOR_GZIP;
+
+	if (strcmp(name, "xz") == 0)
+		return IO_COMPRESSOR_XZ;
+
+	if (strcmp(name, "zstd") == 0)
+		return IO_COMPRESSOR_ZSTD;
+
+	if (strcmp(name, "bzip2") == 0)
+		return IO_COMPRESSOR_BZIP2;
+
+	return -1;
+}
+
+const char *io_compressor_name_from_id(int id)
+{
+	if (id == IO_COMPRESSOR_GZIP)
+		return "gzip";
+
+	if (id == IO_COMPRESSOR_XZ)
+		return "xz";
+
+	if (id == IO_COMPRESSOR_ZSTD)
+		return "zstd";
+
+	if (id == IO_COMPRESSOR_BZIP2)
+		return "bzip2";
+
+	return NULL;
+}
+
+bool io_compressor_exists(int id)
+{
+	switch (id) {
+#ifdef WITH_GZIP
+	case IO_COMPRESSOR_GZIP:
+		return true;
+#endif
+#ifdef WITH_XZ
+	case IO_COMPRESSOR_XZ:
+		return true;
+#endif
+#if defined(WITH_ZSTD) && defined(HAVE_ZSTD_STREAM)
+	case IO_COMPRESSOR_ZSTD:
+		return true;
+#endif
+#ifdef WITH_BZIP2
+	case IO_COMPRESSOR_BZIP2:
+		return true;
+#endif
+	default:
+		break;
+	}
+
+	return false;
+}