X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=block-sha1%2Fsha1.c;h=d8934757a5e5e259f26c4a09f7ea5d10615df0c1;hb=af24059fa299f1656692f5807eddd3b30b5f3cfb;hp=464cb258aaa11786d3615a55c0ae8dff95150667;hpb=dad1a454d5411a50dc8a51837cf859f40804b776;p=git.git

diff --git a/block-sha1/sha1.c b/block-sha1/sha1.c
index 464cb258a..c0054a0b0 100644
--- 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))
@@ -68,6 +70,7 @@
  */
 
 #if defined(__i386__) || defined(__x86_64__) || \
+    defined(_M_IX86) || defined(_M_X64) || \
     defined(__ppc__) || defined(__ppc64__) || \
     defined(__powerpc__) || defined(__powerpc64__) || \
     defined(__s390__) || defined(__s390x__)
@@ -234,13 +237,13 @@ void blk_SHA1_Init(blk_SHA_CTX *ctx)
 
 void blk_SHA1_Update(blk_SHA_CTX *ctx, const void *data, unsigned long len)
 {
-	int lenW = ctx->size & 63;
+	unsigned int lenW = ctx->size & 63;
 
 	ctx->size += len;
 
 	/* Read the data into W and process blocks as they get full */
 	if (lenW) {
-		int left = 64 - lenW;
+		unsigned int left = 64 - lenW;
 		if (len < left)
 			left = len;
 		memcpy(lenW + (char *)ctx->W, data, left);
@@ -267,8 +270,8 @@ void blk_SHA1_Final(unsigned char hashout[20], blk_SHA_CTX *ctx)
 	int i;
 
 	/* Pad with a binary 1 (ie 0x80), then zeroes, then length */
-	padlen[0] = htonl(ctx->size >> 29);
-	padlen[1] = htonl(ctx->size << 3);
+	padlen[0] = htonl((uint32_t)(ctx->size >> 29));
+	padlen[1] = htonl((uint32_t)(ctx->size << 3));
 
 	i = ctx->size & 63;
 	blk_SHA1_Update(ctx, pad, 1+ (63 & (55 - i)));