]> wimlib.net Git - wimlib/blobdiff - src/delete_image.c
Re-organize code
[wimlib] / src / delete_image.c
diff --git a/src/delete_image.c b/src/delete_image.c
new file mode 100644 (file)
index 0000000..ecd8047
--- /dev/null
@@ -0,0 +1,92 @@
+/*
+ * delete_image.c
+ */
+
+/*
+ * Copyright (C) 2012 Eric Biggers
+ *
+ * This file is part of wimlib, a library for working with WIM files.
+ *
+ * wimlib is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ */
+
+#include "wimlib_internal.h"
+#include "xml.h"
+#include <string.h>
+
+/*
+ * Deletes an image from the WIM.
+ */
+WIMLIBAPI int wimlib_delete_image(WIMStruct *w, int image)
+{
+       int i;
+       int ret;
+
+       if (w->hdr.total_parts != 1) {
+               ERROR("Deleting an image from a split WIM is not supported.");
+               return WIMLIB_ERR_SPLIT_UNSUPPORTED;
+       }
+
+       if (image == WIMLIB_ALL_IMAGES) {
+               for (i = w->hdr.image_count; i >= 1; i--) {
+                       ret = wimlib_delete_image(w, i);
+                       if (ret != 0)
+                               return ret;
+               }
+               return 0;
+       }
+
+       if (!w->all_images_verified) {
+               ret = wim_run_full_verifications(w);
+               if (ret != 0)
+                       return ret;
+       }
+
+       DEBUG("Deleting image %d", image);
+
+       /* Even if the dentry tree is not allocated, we must select it (and
+        * therefore allocate it) so that we can decrement the reference counts
+        * in the lookup table.  */
+       ret = select_wim_image(w, image);
+       if (ret != 0)
+               return ret;
+
+       /* Free the dentry tree, any lookup table entries that have their
+        * refcnt decremented to 0, and the security data. */
+       destroy_image_metadata(&w->image_metadata[image - 1], w->lookup_table);
+
+       /* Get rid of the empty slot in the image metadata array. */
+       memmove(&w->image_metadata[image - 1], &w->image_metadata[image],
+               (w->hdr.image_count - image) * sizeof(struct image_metadata));
+
+       /* Decrement the image count. */
+       if (--w->hdr.image_count == 0) {
+               FREE(w->image_metadata);
+               w->image_metadata = NULL;
+       }
+
+       /* Fix the boot index. */
+       if (w->hdr.boot_idx == image)
+               w->hdr.boot_idx = 0;
+       else if (w->hdr.boot_idx > image)
+               w->hdr.boot_idx--;
+
+       w->current_image = WIMLIB_NO_IMAGE;
+
+       /* Remove the image from the XML information. */
+       xml_delete_image(&w->wim_info, image);
+
+       w->deletion_occurred = true;
+       return 0;
+}