Merge branch 'nd/sparse'

[git.git] / block-sha1 / sha1.c

diff --git a/block-sha1/sha1.c b/block-sha1/sha1.c
index e5a100754e1d2c62ef168d0c120180ef4da7647b..d8934757a5e5e259f26c4a09f7ea5d10615df0c1 100644 (file)
--- a/block-sha1/sha1.c
+++ b/block-sha1/sha1.c
@@ -1,15 +1,17 @@
 /*
- * Based on the Mozilla SHA1 (see mozilla-sha1/sha1.c),
- * optimized to do word accesses rather than byte accesses,
+ * SHA1 routine optimized to do word accesses rather than byte accesses,
  * and to avoid unnecessary copies into the context array.
+ *
+ * This was initially based on the Mozilla SHA1 implementation, although
+ * none of the original Mozilla code remains.
  */
 
-#include <string.h>
-#include <arpa/inet.h>
+/* this is only to get definitions for memcpy(), ntohl() and htonl() */
+#include "../git-compat-util.h"
 
 #include "sha1.h"
 
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 
 /*
  * Force usage of rol or ror by selecting the one with the smaller constant.
@@ -54,7 +56,7 @@
 
 #if defined(__i386__) || defined(__x86_64__)
   #define setW(x, val) (*(volatile unsigned int *)&W(x) = (val))
-#elif defined(__arm__)
+#elif defined(__GNUC__) && defined(__arm__)
   #define setW(x, val) do { W(x) = (val); __asm__("":::"memory"); } while (0)
 #else
   #define setW(x, val) (W(x) = (val))
@@ -246,14 +248,14 @@ void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *data, unsigned long len)
                memcpy(lenW + (char *)ctx->W, data, left);
                lenW = (lenW + left) & 63;
                len -= left;
-               data += left;
+               data = ((const char *)data + left);
                if (lenW)
                        return;
                blk_SHA1_Block(ctx, ctx->W);
        }
        while (len >= 64) {
                blk_SHA1_Block(ctx, data);
-               data += 64;
+               data = ((const char *)data + 64);
                len -= 64;
        }
        if (len)