1 files changed, 19 insertions, 0 deletions
diff --git a/ext/digest/digest.h b/ext/digest/digest.h
index 85848d5682..30359ad348 100644
--- a/ext/digest/digest.h
+++ b/ext/digest/digest.h
@@ -30,3 +30,22 @@ typedef struct {
     rb_digest_hash_update_func_t update_func;
     rb_digest_hash_finish_func_t finish_func;
 } rb_digest_metadata_t;
+
+#define DEFINE_UPDATE_FUNC_FOR_UINT(name) \
+void \
+rb_digest_##name##_update(void *ctx, unsigned char *ptr, size_t size) \
+{ \
+    const unsigned int stride = 16384; \
+ \
+    for (; size > stride; size -= stride, ptr += stride) { \
+	name##_Update(ctx, ptr, stride); \
+    } \
+    if (size > 0) name##_Update(ctx, ptr, size); \
+}
+
+#define DEFINE_FINISH_FUNC_FROM_FINAL(name) \
+int \
+rb_digest_##name##_finish(void *ctx, unsigned char *ptr) \
+{ \
+    return name##_Final(ptr, ctx); \
+}