thodg/libgit2

diff --git a/src/offmap.c b/src/offmap.c
new file mode 100644
index 0000000..3f51f6e
--- /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"
+
+GIT__USE_OFFMAP
+
+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);
+}
diff --git a/src/offmap.h b/src/offmap.h
index 56003cf..db79e48 100644
--- a/src/offmap.h
+++ b/src/offmap.h
@@ -23,34 +23,25 @@ typedef khash_t(off) git_offmap;
 #define GIT__USE_OFFMAP \
 	__KHASH_IMPL(off, static kh_inline, git_off_t, void *, 1, kh_int64_hash_func, kh_int64_hash_equal)
 
-#define git_offmap_alloc()  kh_init(off)
-#define git_offmap_free(h)  kh_destroy(off, h), h = NULL
-#define git_offmap_clear(h) kh_clear(off, h)
+git_offmap *git_offmap_alloc(void);
+#define git_offmap_free(h) git_offmap__free(h); (h) = NULL
+void git_offmap__free(git_offmap *map);
+void git_offmap_clear(git_offmap *map);
 
-#define git_offmap_num_entries(h) kh_size(h)
+size_t git_offmap_num_entries(git_offmap *map);
 
-#define git_offmap_lookup_index(h, k)  kh_get(off, h, k)
-#define git_offmap_valid_index(h, idx) (idx != kh_end(h))
+size_t git_offmap_lookup_index(git_offmap *map, const git_off_t key);
+int git_offmap_valid_index(git_offmap *map, size_t idx);
 
-#define git_offmap_exists(h, k) (kh_get(off, h, k) != kh_end(h))
+int git_offmap_exists(git_offmap *map, const git_off_t key);
 
-#define git_offmap_value_at(h, idx)        kh_val(h, idx)
-#define git_offmap_set_value_at(h, idx, v) kh_val(h, idx) = v
-#define git_offmap_delete_at(h, idx)       kh_del(off, h, idx)
+void *git_offmap_value_at(git_offmap *map, size_t idx);
+void git_offmap_set_value_at(git_offmap *map, size_t idx, void *value);
+void git_offmap_delete_at(git_offmap *map, size_t idx);
 
-#define git_offmap_put(h, k, err)          kh_put(off, h, k, err)
-
-#define git_offmap_insert(h, key, val, rval) do { \
-	khiter_t __pos = kh_put(off, h, key, rval); \
-	if ((*rval) >= 0) { \
-		if ((*rval) == 0) kh_key(h, __pos) = key; \
-		kh_val(h, __pos) = val; \
-	} } while (0)
-
-#define git_offmap_delete(h, key) do { \
-	khiter_t __pos = git_offmap_lookup_index(h, key); \
-	if (git_offmap_valid_index(h, __pos)) \
-		git_offmap_delete_at(h, __pos); } while (0)
+int git_offmap_put(git_offmap *map, const git_off_t key, int *err);
+void git_offmap_insert(git_offmap *map, const git_off_t key, void *value, int *rval);
+void git_offmap_delete(git_offmap *map, const git_off_t key);
 
 #define git_offmap_foreach		kh_foreach
 #define git_offmap_foreach_value	kh_foreach_value