Added function-based initializers for every options struct.

The basic structure of each function is courtesy of arrbee.

3 files changed, 39 insertions, 0 deletions

diff --git a/include/git2/sys/config.h b/include/git2/sys/config.h
index 419ad7ea7..3df2ba327 100644
--- a/include/git2/sys/config.h
+++ b/include/git2/sys/config.h
@@ -70,6 +70,19 @@ struct git_config_backend {
 #define GIT_CONFIG_BACKEND_INIT {GIT_CONFIG_BACKEND_VERSION}
 
 /**
+ * Initializes a `git_config_backend` with default values. Equivalent to
+ * creating an instance with GIT_CONFIG_BACKEND_INIT.
+ *
+ * @param opts the `git_config_backend` instance to initialize.
+ * @param version the version of the struct; you should pass
+ *        `GIT_CONFIG_BACKEND_VERSION` here.
+ * @return Zero on success; -1 on failure.
+ */
+GIT_EXTERN(int) git_config_init_backend(
+	git_config_backend* backend,
+	int version);
+
+/**
  * Add a generic config file instance to an existing config
  *
  * Note that the configuration object will free the file
diff --git a/include/git2/sys/odb_backend.h b/include/git2/sys/odb_backend.h
index 4917ba0f0..81bb082e6 100644
--- a/include/git2/sys/odb_backend.h
+++ b/include/git2/sys/odb_backend.h
@@ -89,6 +89,19 @@ struct git_odb_backend {
 #define GIT_ODB_BACKEND_VERSION 1
 #define GIT_ODB_BACKEND_INIT {GIT_ODB_BACKEND_VERSION}
 
+/**
+ * Initializes a `git_odb_backend` with default values. Equivalent to
+ * creating an instance with GIT_ODB_BACKEND_INIT.
+ *
+ * @param opts the `git_odb_backend` instance to initialize.
+ * @param version the version of the struct; you should pass
+ *        `GIT_ODB_BACKEND_VERSION` here.
+ * @return Zero on success; -1 on failure.
+ */
+GIT_EXTERN(int) git_odb_init_backend(
+	git_odb_backend* backend,
+	int version);
+
 GIT_EXTERN(void *) git_odb_backend_malloc(git_odb_backend *backend, size_t len);
 
 GIT_END_DECL
diff --git a/include/git2/sys/refdb_backend.h b/include/git2/sys/refdb_backend.h
index aa5ef9ecc..dce142c77 100644
--- a/include/git2/sys/refdb_backend.h
+++ b/include/git2/sys/refdb_backend.h
@@ -159,6 +159,19 @@ struct git_refdb_backend {
 #define GIT_REFDB_BACKEND_INIT {GIT_REFDB_BACKEND_VERSION}
 
 /**
+ * Initializes a `git_refdb_backend` with default values. Equivalent to
+ * creating an instance with GIT_REFDB_BACKEND_INIT.
+ *
+ * @param opts the `git_refdb_backend` instance to initialize.
+ * @param version the version of the struct; you should pass
+ *        `GIT_REFDB_BACKEND_VERSION` here.
+ * @return Zero on success; -1 on failure.
+ */
+GIT_EXTERN(int) git_refdb_init_backend(
+	git_refdb_backend* backend,
+	int version);
+
+/**
  * Constructors for default filesystem-based refdb backend
  *
  * Under normal usage, this is called for you when the repository is