1 files changed, 83 insertions, 0 deletions
diff --git a/src/offmap.c b/src/offmap.c
new file mode 100644
index 000000000..023c9b417
--- /dev/null
+++ b/src/offmap.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * 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 "offmap.h"
+
+__KHASH_IMPL(off, static kh_inline, git_off_t, void *, 1, kh_int64_hash_func, kh_int64_hash_equal)
+
+git_offmap *git_offmap_alloc(void)
+{
+	return kh_init(off);
+}
+
+void git_offmap__free(git_offmap *map)
+{
+	kh_destroy(off, map);
+}
+
+void git_offmap_clear(git_offmap *map)
+{
+	kh_clear(off, map);
+}
+
+size_t git_offmap_num_entries(git_offmap *map)
+{
+	return kh_size(map);
+}
+
+size_t git_offmap_lookup_index(git_offmap *map, const git_off_t key)
+{
+	return kh_get(off, map, key);
+}
+
+int git_offmap_valid_index(git_offmap *map, size_t idx)
+{
+	return idx != kh_end(map);
+}
+
+int git_offmap_exists(git_offmap *map, const git_off_t key)
+{
+	return kh_get(off, map, key) != kh_end(map);
+}
+
+void *git_offmap_value_at(git_offmap *map, size_t idx)
+{
+	return kh_val(map, idx);
+}
+
+void git_offmap_set_value_at(git_offmap *map, size_t idx, void *value)
+{
+	kh_val(map, idx) = value;
+}
+
+void git_offmap_delete_at(git_offmap *map, size_t idx)
+{
+	kh_del(off, map, idx);
+}
+
+int git_offmap_put(git_offmap *map, const git_off_t key, int *err)
+{
+	return kh_put(off, map, key, err);
+}
+
+void git_offmap_insert(git_offmap *map, const git_off_t key, void *value, int *rval)
+{
+	khiter_t idx = kh_put(off, map, key, rval);
+
+	if ((*rval) >= 0) {
+		if ((*rval) == 0)
+			kh_key(map, idx) = key;
+		kh_val(map, idx) = value;
+	}
+}
+
+void git_offmap_delete(git_offmap *map, const git_off_t key)
+{
+	khiter_t idx = git_offmap_lookup_index(map, key);
+	if (git_offmap_valid_index(map, idx))
+		git_offmap_delete_at(map, idx);
+}