tempfile: handle NULL tempfile pointers gracefully

diff --git a/sha1-lookup.h b/sha1-lookup.h
index 3249a81b3d664afc89c98e6d9dd6b512092a82f9..20af2856818ed51b2afb1718a7e317133ee0d7bd 100644 (file)
--- a/sha1-lookup.h
+++ b/sha1-lookup.h
@@ -1,6 +1,13 @@
 #ifndef SHA1_LOOKUP_H
 #define SHA1_LOOKUP_H
 
+typedef const unsigned char *sha1_access_fn(size_t index, void *table);
+
+extern int sha1_pos(const unsigned char *sha1,
+                   void *table,
+                   size_t nr,
+                   sha1_access_fn fn);
+
 extern int sha1_entry_pos(const void *table,
                          size_t elem_size,
                          size_t key_offset,