missing file from libzip 0.11.2

1 files changed, 83 insertions, 0 deletions

diff --git a/ext/zip/lib/zip_file_set_external_attributes.c b/ext/zip/lib/zip_file_set_external_attributes.c
new file mode 100644
index 0000000000..0820d6f5c8
--- /dev/null
+++ b/ext/zip/lib/zip_file_set_external_attributes.c
@@ -0,0 +1,83 @@
+/*
+  zip_file_set_external_attributes.c -- set external attributes for entry
+  Copyright (C) 2013 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  The authors can be contacted at <libzip@nih.at>
+
+  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"
+
+int
+zip_file_set_external_attributes(struct zip *za, zip_uint64_t idx, zip_flags_t flags, zip_uint8_t opsys, zip_uint32_t attributes)
+{
+    struct zip_entry *e;
+    int changed;
+    zip_uint8_t unchanged_opsys;
+    zip_uint32_t unchanged_attributes;
+
+    if (_zip_get_dirent(za, idx, 0, NULL) == NULL)
+	return -1;
+
+    if (ZIP_IS_RDONLY(za)) {
+	_zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
+	return -1;
+    }
+
+    e = za->entry+idx;
+
+    unchanged_opsys = e->orig ? e->orig->version_madeby>>8 : ZIP_OPSYS_DEFAULT;
+    unchanged_attributes = e->orig ? e->orig->ext_attrib : ZIP_EXT_ATTRIB_DEFAULT;
+
+    changed = (opsys != unchanged_opsys || attributes != unchanged_attributes);
+
+    if (changed) {
+        if (e->changes == NULL) {
+            if ((e->changes=_zip_dirent_clone(e->orig)) == NULL) {
+                _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
+                return -1;
+            }
+        }
+        e->changes->version_madeby = (opsys << 8) | (e->changes->version_madeby & 0xff);
+	e->changes->ext_attrib = attributes;
+        e->changes->changed |= ZIP_DIRENT_ATTRIBUTES;
+    }
+    else if (e->changes) {
+	e->changes->changed &= ~ZIP_DIRENT_ATTRIBUTES;
+	if (e->changes->changed == 0) {
+	    _zip_dirent_free(e->changes);
+	    e->changes = NULL;
+	}
+	else {
+	    e->changes->version_madeby = (unchanged_opsys << 8) | (e->changes->version_madeby & 0xff);
+	    e->changes->ext_attrib = unchanged_attributes;
+	}
+    }
+
+    return 0;
+}