X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Flookup_table.h;h=ca418219a898aaf1cf7b83e07cb2b580d66f6e7a;hb=ebd6c0ec0ff47ac18af4ef918fd78fb8d9f19540;hp=242e2c1b87f04863ee26ba33a0daea66ddf29475;hpb=1530b6dab02a9e1e5faf81529ab502aee68d8cd2;p=wimlib

diff --git a/src/lookup_table.h b/src/lookup_table.h
index 242e2c1b..ca418219 100644
--- a/src/lookup_table.h
+++ b/src/lookup_table.h
@@ -11,13 +11,19 @@
 #define LOOKUP_FLAG_ADS_OK		0x00000001
 #define LOOKUP_FLAG_DIRECTORY_OK	0x00000002
 
-/* Not yet used */
-//#define LOOKUP_FLAG_FOLLOW_SYMLINKS	0x00000004
 
-
-/* A lookup table that is used to translate the hash codes of dentries into the
- * offsets and sizes of uncompressed or compressed file resources.  It is
- * implemented as a hash table. */
+/* The lookup table of a WIM file maps SHA1 message digests to streams of data.
+ * Here, the in-memory structure is implemented as a hash table.
+ *
+ * Given a SHA1 message digest, the mapped-to stream is specified by an offset
+ * in the WIM, an uncompressed and compressed size, and resource flags (see
+ * 'struct resource_entry').  But, we associate additional information, such as
+ * a reference count, with each stream, so the actual mapping is from SHA1
+ * message digests to 'struct wim_lookup_table_entry's, each of which contains
+ * an embedded 'struct resource_entry'.
+ *
+ * Note: Everything will break horribly if there is a SHA1 collision.
+ */
 struct wim_lookup_table {
 	struct hlist_head *array;
 	u64 num_entries;
@@ -71,6 +77,10 @@ enum resource_location {
 	 * point or not. @ntfs_loc points to a structure containing this
 	 * information. */
 	RESOURCE_IN_NTFS_VOLUME,
+
+	/* Resource must be accessed using Win32 API (may be a named data
+	 * stream) */
+	RESOURCE_WIN32,
 };
 
 /*
@@ -265,7 +275,8 @@ extern struct wim_lookup_table_entry *
 clone_lookup_table_entry(const struct wim_lookup_table_entry *lte);
 
 extern void
-print_lookup_table_entry(const struct wim_lookup_table_entry *entry);
+print_lookup_table_entry(const struct wim_lookup_table_entry *entry,
+			 FILE *out);
 
 extern void
 free_lookup_table_entry(struct wim_lookup_table_entry *lte);