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Diffstat (limited to 'lib/fstream/uncompress/autodetect.c')
-rw-r--r--lib/fstream/uncompress/autodetect.c55
1 files changed, 0 insertions, 55 deletions
diff --git a/lib/fstream/uncompress/autodetect.c b/lib/fstream/uncompress/autodetect.c
deleted file mode 100644
index 61628f8..0000000
--- a/lib/fstream/uncompress/autodetect.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * autodetect.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "../internal.h"
-
-static const struct {
- int id;
- const sqfs_u8 *value;
- size_t len;
-} magic[] = {
- { FSTREAM_COMPRESSOR_GZIP, (const sqfs_u8 *)"\x1F\x8B\x08", 3 },
- { FSTREAM_COMPRESSOR_XZ, (const sqfs_u8 *)("\xFD" "7zXZ"), 6 },
- { FSTREAM_COMPRESSOR_ZSTD, (const sqfs_u8 *)"\x28\xB5\x2F\xFD", 4 },
- { FSTREAM_COMPRESSOR_BZIP2, (const sqfs_u8 *)"BZh", 3 },
-};
-
-int istream_detect_compressor(istream_t *strm,
- int (*probe)(const sqfs_u8 *data, size_t size))
-{
- size_t i;
- int ret;
-
- ret = istream_precache(strm);
- if (ret != 0)
- return ret;
-
- if (probe != NULL) {
- ret = probe(strm->buffer + strm->buffer_offset,
- strm->buffer_used - strm->buffer_offset);
- if (ret < 0)
- return ret;
-
- /* XXX: this means the data is uncompressed. We do this check
- first since it might be perfectly OK for the uncompressed
- data to contain a magic number from the table. */
- if (ret > 0)
- return 0;
- }
-
- for (i = 0; i < sizeof(magic) / sizeof(magic[0]); ++i) {
- if ((strm->buffer_used - strm->buffer_offset) < magic[i].len)
- continue;
-
- ret = memcmp(strm->buffer + strm->buffer_offset,
- magic[i].value, magic[i].len);
-
- if (ret == 0)
- return magic[i].id;
- }
-
- return 0;
-}