sd-id128: split UUID file read/write code into new id128-util.[ch]

[elogind.git] / src / libelogind / sd-id128 / id128-util.h

diff --git a/src/libelogind/sd-id128/id128-util.h b/src/libelogind/sd-id128/id128-util.h
new file mode 100644 (file)
index 0000000..4a04c80
--- /dev/null
+++ b/src/libelogind/sd-id128/id128-util.h
@@ -0,0 +1,45 @@
+#pragma once
+
+/***
+  This file is part of elogind.
+
+  Copyright 2016 Lennart Poettering
+
+  elogind is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  elogind is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with elogind; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+
+#include "sd-id128.h"
+#include "macro.h"
+
+char *id128_to_uuid_string(sd_id128_t id, char s[37]);
+
+/* Like SD_ID128_FORMAT_STR, but formats as UUID, not in plain format */
+#define ID128_UUID_FORMAT_STR "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
+
+bool id128_is_valid(const char *s) _pure_;
+
+typedef enum Id128Format {
+        ID128_ANY,
+        ID128_PLAIN,  /* formatted as 32 hex chars as-is */
+        ID128_UUID,   /* formatted as 36 character uuid string */
+        _ID128_FORMAT_MAX,
+} Id128Format;
+
+int id128_read_fd(int fd, Id128Format f, sd_id128_t *ret);
+int id128_read(const char *p, Id128Format f, sd_id128_t *ret);
+
+int id128_write_fd(int fd, Id128Format f, sd_id128_t id);
+int id128_write(const char *p, Id128Format f, sd_id128_t id);