Litecoin: Adapt scrypt code to C++

src/scrypt.cpp

@@ -73,11 +73,11 @@ typedef struct HMAC_SHA256Context {
 
 /* Initialize an HMAC-SHA256 operation with the given key. */
 static void
-HMAC_SHA256_Init(HMAC_SHA256_CTX *ctx, const unsigned char *_K, size_t Klen)
+HMAC_SHA256_Init(HMAC_SHA256_CTX *ctx, const void *_K, size_t Klen)
 {
 	unsigned char pad[64];
 	unsigned char khash[32];
-	const unsigned char *K = _K;
+	const unsigned char *K = (const unsigned char *)_K;
 	size_t i;
 
 	/* If Klen > 64, the key is really SHA256(K). */

src/scrypt.h

@@ -1,17 +1,9 @@
 #ifndef SCRYPT_H
 #define SCRYPT_H
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define SCRYPT_SCRATCHPAD_SIZE (131072 + 63)
+static const int SCRYPT_SCRATCHPAD_SIZE = 131072 + 63;
 
 void scrypt_1024_1_1_256_sp(const char *input, char *output, char *scratchpad);
 void scrypt_1024_1_1_256(const char *input, char *output);
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif