1 files changed, 78 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_source_pass_to_lower_layer.c b/src/Common/libzip/zip_source_pass_to_lower_layer.c
new file mode 100644
index 00000000..4a98222e
--- /dev/null
+++ b/src/Common/libzip/zip_source_pass_to_lower_layer.c
@@ -0,0 +1,78 @@
+/*
+  zip_source_pass_to_lower_layer.c -- pass command to lower layer
+  Copyright (C) 2022 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  The authors can be contacted at <info@libzip.org>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+  3. The names of the authors may not be used to endorse or promote
+     products derived from this software without specific prior
+     written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "zipint.h"
+
+zip_int64_t zip_source_pass_to_lower_layer(zip_source_t *src, void *data, zip_uint64_t length, zip_source_cmd_t command) {
+    switch (command) {
+    case ZIP_SOURCE_OPEN:
+    case ZIP_SOURCE_CLOSE:
+    case ZIP_SOURCE_FREE:
+    case ZIP_SOURCE_GET_FILE_ATTRIBUTES:
+    case ZIP_SOURCE_SUPPORTS_REOPEN:
+        return 0;
+
+    case ZIP_SOURCE_STAT:
+        return sizeof(zip_stat_t);
+
+    case ZIP_SOURCE_ACCEPT_EMPTY:
+    case ZIP_SOURCE_ERROR:
+    case ZIP_SOURCE_READ:
+    case ZIP_SOURCE_SEEK:
+    case ZIP_SOURCE_TELL:
+        return _zip_source_call(src, data, length, command);
+
+
+    case ZIP_SOURCE_BEGIN_WRITE:
+    case ZIP_SOURCE_BEGIN_WRITE_CLONING:
+    case ZIP_SOURCE_COMMIT_WRITE:
+    case ZIP_SOURCE_REMOVE:
+    case ZIP_SOURCE_ROLLBACK_WRITE:
+    case ZIP_SOURCE_SEEK_WRITE:
+    case ZIP_SOURCE_TELL_WRITE:
+    case ZIP_SOURCE_WRITE:
+        zip_error_set(&src->error, ZIP_ER_OPNOTSUPP, 0);
+        return -1;
+
+    case ZIP_SOURCE_SUPPORTS:
+        if (length < sizeof(zip_int64_t)) {
+            zip_error_set(&src->error, ZIP_ER_INTERNAL, 0);
+            return -1;
+        }
+        return *(zip_int64_t *)data;
+
+    default:
+        zip_error_set(&src->error, ZIP_ER_OPNOTSUPP, 0);
+        return -1;
+    }
+}
+\ No newline at end of file