dentry_hash() function to get hash of default data stream

[wimlib] / src / dentry.h

diff --git a/src/dentry.h b/src/dentry.h
index ac4454f9e442bc014232468a42c6ba03c050bc92..e9fef47530636d322b43f97c6d979508d1a821c2 100644 (file)
--- a/src/dentry.h
+++ b/src/dentry.h
@@ -175,6 +175,19 @@ struct dentry {
        int refcnt;
 };
 
+/* Return hash of the "unnamed" (default) data stream. */
+static inline const u8 *dentry_hash(const struct dentry *dentry)
+{
+       /* If there are alternate data streams, the dentry hash field is zeroed
+        * out, and we need to find the hash in the un-named data stream (should
+        * be the first one, but check them in order just in case, and fall back
+        * to the dentry hash field if we can't find an unnamed data stream). */
+       for (u16 i = 0; i < dentry->num_ads; i++)
+               if (dentry->ads_entries[i].stream_name_len == 0)
+                       return dentry->ads_entries[i].hash;
+       return dentry->hash;
+}
+
 extern u64 dentry_total_length(const struct dentry *dentry);
 
 extern void stbuf_to_dentry(const struct stat *stbuf, struct dentry *dentry);