Split stream compression out of libio

Move it to a separate libxfrm library, where it can be independently
tested as well. The bulk of the new code is also mainly test cases
for the compressors.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 0 insertions, 106 deletions

diff --git a/lib/io/compress/ostream_compressor.c b/lib/io/compress/ostream_compressor.c
deleted file mode 100644
index a5f16d5..0000000
--- a/lib/io/compress/ostream_compressor.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * ostream_compressor.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "../internal.h"
-
-static int comp_append(ostream_t *strm, const void *data, size_t size)
-{
-	ostream_comp_t *comp = (ostream_comp_t *)strm;
-	size_t diff;
-
-	while (size > 0) {
-		if (comp->inbuf_used >= BUFSZ) {
-			if (comp->flush_inbuf(comp, false))
-				return -1;
-		}
-
-		diff = BUFSZ - comp->inbuf_used;
-
-		if (diff > size)
-			diff = size;
-
-		memcpy(comp->inbuf + comp->inbuf_used, data, diff);
-
-		comp->inbuf_used += diff;
-		data = (const char *)data + diff;
-		size -= diff;
-	}
-
-	return 0;
-}
-
-static int comp_flush(ostream_t *strm)
-{
-	ostream_comp_t *comp = (ostream_comp_t *)strm;
-
-	if (comp->inbuf_used > 0) {
-		if (comp->flush_inbuf(comp, true))
-			return -1;
-	}
-
-	return comp->wrapped->flush(comp->wrapped);
-}
-
-static const char *comp_get_filename(ostream_t *strm)
-{
-	ostream_comp_t *comp = (ostream_comp_t *)strm;
-
-	return comp->wrapped->get_filename(comp->wrapped);
-}
-
-static void comp_destroy(sqfs_object_t *obj)
-{
-	ostream_comp_t *comp = (ostream_comp_t *)obj;
-
-	comp->cleanup(comp);
-	sqfs_drop(comp->wrapped);
-	free(comp);
-}
-
-ostream_t *ostream_compressor_create(ostream_t *strm, int comp_id)
-{
-	ostream_comp_t *comp = NULL;
-	ostream_t *base;
-
-	switch (comp_id) {
-	case IO_COMPRESSOR_GZIP:
-#ifdef WITH_GZIP
-		comp = ostream_gzip_create(strm->get_filename(strm));
-#endif
-		break;
-	case IO_COMPRESSOR_XZ:
-#ifdef WITH_XZ
-		comp = ostream_xz_create(strm->get_filename(strm));
-#endif
-		break;
-	case IO_COMPRESSOR_ZSTD:
-#if defined(WITH_ZSTD) && defined(HAVE_ZSTD_STREAM)
-		comp = ostream_zstd_create(strm->get_filename(strm));
-#endif
-		break;
-	case IO_COMPRESSOR_BZIP2:
-#ifdef WITH_BZIP2
-		comp = ostream_bzip2_create(strm->get_filename(strm));
-#endif
-		break;
-	default:
-		break;
-	}
-
-	if (comp == NULL)
-		return NULL;
-
-	sqfs_object_init(comp, comp_destroy, NULL);
-
-	comp->wrapped = sqfs_grab(strm);
-	comp->inbuf_used = 0;
-
-	base = (ostream_t *)comp;
-	base->append = comp_append;
-	base->flush = comp_flush;
-	base->get_filename = comp_get_filename;
-	return base;
-}