1 files changed, 9 insertions, 10 deletions
diff --git a/src/nvim/sha256.c b/src/nvim/sha256.c
index 9d6a2f2c41..53c9cb7c81 100644
--- a/src/nvim/sha256.c
+++ b/src/nvim/sha256.c
@@ -73,8 +73,8 @@ static void sha256_process(context_sha256_T *ctx, const char_u data[SHA256_BUFFE
   GET_UINT32(W[14], data, 56);
   GET_UINT32(W[15], data, 60);
 
-#define  SHR(x, n) ((x & 0xFFFFFFFF) >> n)
-#define ROTR(x, n) (SHR(x, n) | (x << (32 - n)))
+#define  SHR(x, n) (((x) & 0xFFFFFFFF) >> (n))
+#define ROTR(x, n) (SHR(x, n) | ((x) << (32 - (n))))
 
 #define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^  SHR(x, 3))
 #define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^  SHR(x, 10))
@@ -82,17 +82,16 @@ static void sha256_process(context_sha256_T *ctx, const char_u data[SHA256_BUFFE
 #define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
 #define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
 
-#define F0(x, y, z) ((x & y) | (z & (x | y)))
-#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
+#define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
 
 #define R(t) \
-  (W[t] = S1(W[t -  2]) + W[t -  7] + \
-          S0(W[t - 15]) + W[t - 16])
+  (W[t] = S1(W[(t) - 2]) + W[(t) - 7] + S0(W[(t) - 15]) + W[(t) - 16])
 
 #define P(a, b, c, d, e, f, g, h, x, K) { \
-  temp1 = h + S3(e) + F1(e, f, g) + K + x; \
+  temp1 = (h) + S3(e) + F1(e, f, g) + (K) + (x); \
   temp2 = S2(a) + F0(a, b, c); \
-  d += temp1; h = temp1 + temp2; \
+  (d) += temp1; (h) = temp1 + temp2; \
 }
 
   A = ctx->state[0];
@@ -185,7 +184,7 @@ void sha256_update(context_sha256_T *ctx, const char_u *input, size_t length)
     return;
   }
 
-  uint32_t left = ctx->total[0] & (SHA256_BUFFER_SIZE-1);  // left < buf size
+  uint32_t left = ctx->total[0] & (SHA256_BUFFER_SIZE - 1);  // left < buf size
 
   ctx->total[0] += (uint32_t)length;
   ctx->total[0] &= 0xFFFFFFFF;
@@ -336,7 +335,7 @@ bool sha256_self_test(void)
       sha256_finish(&ctx, sha256sum);
 
       for (size_t j = 0; j < SHA256_SUM_SIZE; j++) {
-        snprintf(output + j * SHA_STEP, SHA_STEP+1, "%02x", sha256sum[j]);
+        snprintf(output + j * SHA_STEP, SHA_STEP + 1, "%02x", sha256sum[j]);
       }
     }