Add a few basic functions for the repository

c_src/geef.c

@@ -5,6 +5,18 @@
 
 #define MAXBUFLEN       1024
 
+static ErlNifResourceType *geef_repository_type;
+
+typedef struct {
+    git_repository *repo;
+} geef_repository;
+
+static struct {
+    ERL_NIF_TERM ok;
+    ERL_NIF_TERM error;
+    ERL_NIF_TERM repository;
+} geef_atoms;
+
 static ERL_NIF_TERM
 geef_hex_to_raw(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
 {
@@ -50,10 +62,81 @@ geef_object_exists(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
   return enif_make_atom(env, "false");
 }
 
+static void repository_free(ErlNifEnv *env, void *cd)
+{
+    geef_repository *grepo = (geef_repository *) cd;
+    git_repository_free(grepo->repo);
+}
+
+static int load(ErlNifEnv *env, void **priv, ERL_NIF_TERM load_info)
+{
+    geef_repository_type = enif_open_resource_type(env, NULL,
+        "repository_type", repository_free, ERL_NIF_RT_CREATE, NULL);
+
+    if (geef_repository_type == NULL)
+	return -1;
+
+    geef_atoms.ok = enif_make_atom(env, "ok");
+    geef_atoms.error = enif_make_atom(env, "error");
+    geef_atoms.repository = enif_make_atom(env, "repository");
+
+    return 0;
+}
+
+static ERL_NIF_TERM
+geef_error(ErlNifEnv *env)
+{
+    const git_error *error;
+
+    error = giterr_last();
+    if (error) {
+	return enif_make_tuple2(env, geef_atoms.error,
+				enif_make_string(env, error->message, ERL_NIF_LATIN1));
+    }
+
+    return enif_make_tuple2(env, geef_atoms.error,
+			    enif_make_string(env, "No message specified", ERL_NIF_LATIN1));
+}
+
+static ERL_NIF_TERM
+geef_repository_open(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
+{
+  char path[MAXBUFLEN];
+  git_repository *repo;
+  geef_repository *res_repo;
+  ERL_NIF_TERM term_repo;
+
+  if (enif_get_string(env, argv[0], path, sizeof(path), ERL_NIF_LATIN1) < 1)
+      return enif_make_badarg(env);
+
+  if (git_repository_open(&repo, path) < 0)
+      return geef_error(env);
+
+  res_repo = enif_alloc_resource(geef_repository_type, sizeof(geef_repository));
+  res_repo->repo = repo;
+  term_repo = enif_make_resource(env, res_repo);
+  enif_release_resource(res_repo);
+
+  return enif_make_tuple2(env, geef_atoms.ok, term_repo);
+}
+
+static ERL_NIF_TERM
+geef_repository_path(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
+{
+    geef_repository *repo;
+
+    if (!enif_get_resource(env, argv[0], geef_repository_type, (void **) &repo))
+        return enif_make_badarg(env);
+
+    return enif_make_string(env, git_repository_path(repo->repo), ERL_NIF_LATIN1);
+}
+
 static ErlNifFunc geef_funcs[] =
 {
   {"hex_to_raw", 1, geef_hex_to_raw},
-  {"object_exists", 2, geef_object_exists}
+  {"object_exists", 2, geef_object_exists},
+  {"repository_open", 1, geef_repository_open},
+  {"repository_get_path", 1, geef_repository_path},
 };
 
-ERL_NIF_INIT(geef, geef_funcs, NULL, NULL, NULL, NULL)
+ERL_NIF_INIT(geef, geef_funcs, load, NULL, NULL, NULL)