1 files changed, 32 insertions, 11 deletions
diff --git a/hash.h b/hash.h
index ad2c919991..4367acfec5 100644
--- a/hash.h
+++ b/hash.h
@@ -234,19 +234,20 @@ enum get_oid_result {
 #endif
 
 /* A suitably aligned type for stack allocations of hash contexts. */
-union git_hash_ctx {
-	git_SHA_CTX sha1;
-	git_SHA_CTX_unsafe sha1_unsafe;
-
-	git_SHA256_CTX sha256;
+struct git_hash_ctx {
+	const struct git_hash_algo *algop;
+	union {
+		git_SHA_CTX sha1;
+		git_SHA_CTX_unsafe sha1_unsafe;
+		git_SHA256_CTX sha256;
+	} state;
 };
-typedef union git_hash_ctx git_hash_ctx;
 
-typedef void (*git_hash_init_fn)(git_hash_ctx *ctx);
-typedef void (*git_hash_clone_fn)(git_hash_ctx *dst, const git_hash_ctx *src);
-typedef void (*git_hash_update_fn)(git_hash_ctx *ctx, const void *in, size_t len);
-typedef void (*git_hash_final_fn)(unsigned char *hash, git_hash_ctx *ctx);
-typedef void (*git_hash_final_oid_fn)(struct object_id *oid, git_hash_ctx *ctx);
+typedef void (*git_hash_init_fn)(struct git_hash_ctx *ctx);
+typedef void (*git_hash_clone_fn)(struct git_hash_ctx *dst, const struct git_hash_ctx *src);
+typedef void (*git_hash_update_fn)(struct git_hash_ctx *ctx, const void *in, size_t len);
+typedef void (*git_hash_final_fn)(unsigned char *hash, struct git_hash_ctx *ctx);
+typedef void (*git_hash_final_oid_fn)(struct object_id *oid, struct git_hash_ctx *ctx);
 
 struct git_hash_algo {
 	/*
@@ -296,6 +297,26 @@ struct git_hash_algo {
 };
 extern const struct git_hash_algo hash_algos[GIT_HASH_NALGOS];
 
+static inline void git_hash_clone(struct git_hash_ctx *dst, const struct git_hash_ctx *src)
+{
+	src->algop->clone_fn(dst, src);
+}
+
+static inline void git_hash_update(struct git_hash_ctx *ctx, const void *in, size_t len)
+{
+	ctx->algop->update_fn(ctx, in, len);
+}
+
+static inline void git_hash_final(unsigned char *hash, struct git_hash_ctx *ctx)
+{
+	ctx->algop->final_fn(hash, ctx);
+}
+
+static inline void git_hash_final_oid(struct object_id *oid, struct git_hash_ctx *ctx)
+{
+	ctx->algop->final_oid_fn(oid, ctx);
+}
+
 /*
  * Return a GIT_HASH_* constant based on the name.  Returns GIT_HASH_UNKNOWN if
  * the name doesn't match a known algorithm.