commit e74435a5169b56be901196ad172b4dbda124254d
author Jeff King <peff@peff.net> Thu Oct 24 13:59:49 2013 -0400
committer Junio C Hamano <gitster@pobox.com> Thu Oct 24 15:44:18 2013 -0700
tree eb79a21e602ba8904d4f917f95b720bb4096f5ba
parent 3d092bfc6f2d9a998967979f926c661e9762601c

sha1write: make buffer const-correct

We are passed a "void *" and write it out without ever
touching it; let's indicate that by using "const".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

csum-file.c

diff --git a/csum-file.c b/csum-file.c
index 53f5375..465971c 100644
--- a/csum-file.c
+++ b/csum-file.c
@@ -11,7 +11,7 @@
 #include "progress.h"
 #include "csum-file.h"
 
-static void flush(struct sha1file *f, void *buf, unsigned int count)
+static void flush(struct sha1file *f, const void *buf, unsigned int count)
 {
 	if (0 <= f->check_fd && count)  {
 		unsigned char check_buffer[8192];
@@ -86,13 +86,13 @@
 	return fd;
 }
 
-int sha1write(struct sha1file *f, void *buf, unsigned int count)
+int sha1write(struct sha1file *f, const void *buf, unsigned int count)
 {
 	while (count) {
 		unsigned offset = f->offset;
 		unsigned left = sizeof(f->buffer) - offset;
 		unsigned nr = count > left ? left : count;
-		void *data;
+		const void *data;
 
 		if (f->do_crc)
 			f->crc32 = crc32(f->crc32, buf, nr);