1 files changed, 111 insertions, 0 deletions
diff --git a/ext/zip/lib/zip_file_replace.c b/ext/zip/lib/zip_file_replace.c
new file mode 100644
index 0000000000..7e7e942168
--- /dev/null
+++ b/ext/zip/lib/zip_file_replace.c
@@ -0,0 +1,111 @@
+/*
+  zip_file_replace.c -- replace file via callback function
+  Copyright (C) 1999-2012 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"
+
+
+
+ZIP_EXTERN int
+zip_file_replace(struct zip *za, zip_uint64_t idx, struct zip_source *source, zip_flags_t flags)
+{
+    if (idx >= za->nentry || source == NULL) {
+	_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
+	return -1;
+    }
+
+    if (_zip_file_replace(za, idx, NULL, source, flags) == -1)
+	return -1;
+
+    return 0;
+}
+
+
+
+
+/* NOTE: Signed due to -1 on error.  See zip_add.c for more details. */
+
+zip_int64_t
+_zip_file_replace(struct zip *za, zip_uint64_t idx, const char *name, struct zip_source *source, zip_flags_t flags)
+{
+    zip_uint64_t za_nentry_prev;
+    
+    if (ZIP_IS_RDONLY(za)) {
+	_zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
+	return -1;
+    }
+
+    za_nentry_prev = za->nentry;
+    if (idx == ZIP_UINT64_MAX) {
+	zip_int64_t i = -1;
+	
+	if (flags & ZIP_FL_OVERWRITE)
+	    i = _zip_name_locate(za, name, flags, NULL);
+
+	if (i == -1) {
+	    /* create and use new entry, used by zip_add */
+	    if ((i=_zip_add_entry(za)) < 0)
+		return -1;
+	}
+	idx = (zip_uint64_t)i;
+    }
+    
+    if (name && _zip_set_name(za, idx, name, flags) != 0) {
+	if (za->nentry != za_nentry_prev) {
+	    _zip_entry_finalize(za->entry+idx);
+	    za->nentry = za_nentry_prev;
+	}
+	return -1;
+    }
+
+    /* does not change any name related data, so we can do it here;
+     * needed for a double add of the same file name */
+    _zip_unchange_data(za->entry+idx);
+
+    if (za->entry[idx].orig != NULL && (za->entry[idx].changes == NULL || (za->entry[idx].changes->changed & ZIP_DIRENT_COMP_METHOD) == 0)) {
+        if (za->entry[idx].changes == NULL) {
+            if ((za->entry[idx].changes=_zip_dirent_clone(za->entry[idx].orig)) == NULL) {
+                _zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
+                return -1;
+            }
+        }
+
+        za->entry[idx].changes->comp_method = ZIP_CM_REPLACED_DEFAULT;
+        za->entry[idx].changes->changed |= ZIP_DIRENT_COMP_METHOD;
+    }
+	
+    za->entry[idx].source = source;
+
+    return (zip_int64_t)idx;
+}