Add Windows specific code

src/sha1.cpp

@@ -28,9 +28,35 @@
 /* this is only to get definitions for memcpy(), ntohl() and htonl() */
 //#include "../git-compat-util.h"
 #include <string.h>
-#include <arpa/inet.h>
 #include "sha1.h"
 
+#ifndef WIN32
+#include <arpa/inet.h>
+#else
+#if BYTE_ORDER == BIG_ENDIAN
+
+#define htons(n) (n)
+#define ntohs(n) (n)
+#define htonl(n) (n)
+#define ntohl(n) (n)
+
+#else
+
+#define htons(n) (((((unsigned short)(n) & 0xFF)) << 8) | (((unsigned short)(n) & 0xFF00) >> 8))
+#define ntohs(n) (((((unsigned short)(n) & 0xFF)) << 8) | (((unsigned short)(n) & 0xFF00) >> 8))
+
+#define htonl(n) (((((unsigned long)(n) & 0xFF)) << 24) | \
+    ((((unsigned long)(n) & 0xFF00)) << 8) | \
+    ((((unsigned long)(n) & 0xFF0000)) >> 8) | \
+		  ((((unsigned long)(n) & 0xFF000000)) >> 24))
+
+#define ntohl(n) (((((unsigned long)(n) & 0xFF)) << 24) | \
+    ((((unsigned long)(n) & 0xFF00)) << 8) | \
+    ((((unsigned long)(n) & 0xFF0000)) >> 8) | \
+		  ((((unsigned long)(n) & 0xFF000000)) >> 24))
+#endif
+#endif
+
 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 
 /*