1 files changed, 74 insertions, 0 deletions
diff --git a/samples/C/hash.c b/samples/C/hash.c
new file mode 100644
index 0000000..4607569
--- /dev/null
+++ b/samples/C/hash.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2009-2012 the libgit2 contributors
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "common.h"
+#include "hash.h"
+
+#if defined(PPC_SHA1)
+# include "ppc/sha1.h"
+#else
+# include "sha1.h"
+#endif
+
+struct git_hash_ctx {
+	SHA_CTX c;
+};
+
+git_hash_ctx *git_hash_new_ctx(void)
+{
+	git_hash_ctx *ctx = git__malloc(sizeof(*ctx));
+
+	if (!ctx)
+		return NULL;
+
+	SHA1_Init(&ctx->c);
+
+	return ctx;
+}
+
+void git_hash_free_ctx(git_hash_ctx *ctx)
+{
+	git__free(ctx);
+}
+
+void git_hash_init(git_hash_ctx *ctx)
+{
+	assert(ctx);
+	SHA1_Init(&ctx->c);
+}
+
+void git_hash_update(git_hash_ctx *ctx, const void *data, size_t len)
+{
+	assert(ctx);
+	SHA1_Update(&ctx->c, data, len);
+}
+
+void git_hash_final(git_oid *out, git_hash_ctx *ctx)
+{
+	assert(ctx);
+	SHA1_Final(out->id, &ctx->c);
+}
+
+void git_hash_buf(git_oid *out, const void *data, size_t len)
+{
+	SHA_CTX c;
+
+	SHA1_Init(&c);
+	SHA1_Update(&c, data, len);
+	SHA1_Final(out->id, &c);
+}
+
+void git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n)
+{
+	SHA_CTX c;
+	size_t i;
+
+	SHA1_Init(&c);
+	for (i = 0; i < n; i++)
+		SHA1_Update(&c, vec[i].data, vec[i].len);
+	SHA1_Final(out->id, &c);
+}