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-rw-r--r--lib/io/xfrm.c67
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;
+}