delta: stricter constness

[git.git] / delta.h

diff --git a/delta.h b/delta.h
index 9464f3e..09b2e1e 100644 (file)
--- a/delta.h
+++ b/delta.h
@@ -2,11 +2,11 @@
 #define DELTA_H
 
 /* handling of delta buffers */
-extern void *diff_delta(void *from_buf, unsigned long from_size,
-                       void *to_buf, unsigned long to_size,
+extern void *diff_delta(const void *from_buf, unsigned long from_size,
+                       const void *to_buf, unsigned long to_size,
                        unsigned long *delta_size, unsigned long max_size);
 extern void *patch_delta(void *src_buf, unsigned long src_size,
-                        void *delta_buf, unsigned long delta_size,
+                        const void *delta_buf, unsigned long delta_size,
                         unsigned long *dst_size);
 
 /* the smallest possible delta size is 4 bytes */