added new type and several functions to git_strmap

This step is needed to easily add iterators to git_config_backend
As well use these new git_strmap functions to implement foreach

* git_strmap_iter
* git_strmap_has_data(...)
* git_strmap_begin(...)
* git_strmap_end(...)
* git_strmap_next(...)

1 files changed, 34 insertions, 0 deletions

diff --git a/src/strmap.c b/src/strmap.c
new file mode 100644
index 000000000..1b07359d1
--- /dev/null
+++ b/src/strmap.c
@@ -0,0 +1,34 @@
+/*
+ * 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 "strmap.h"
+
+int git_strmap_next(
+	const char **key,
+	void **data,
+	git_strmap_iter* iter,
+	git_strmap *map)
+{
+	if (!map)
+		return GIT_ERROR;
+
+	while (*iter != git_strmap_end(map)) {
+		if (!(git_strmap_has_data(map, *iter))) {
+			++(*iter);
+			continue;
+		}
+
+		*key = git_strmap_key(map, *iter);
+		*data = git_strmap_value_at(map, *iter);
+
+		++(*iter);
+
+		return GIT_OK;
+	}
+
+	return GIT_ITEROVER;
+}