lib: bt_version_get_extra(): return `NULL` if none instead of empty str.

[babeltrace.git] / include / babeltrace2 / version.h

diff --git a/include/babeltrace2/version.h b/include/babeltrace2/version.h
index 1558385738d0c16603fb5b076cd0fee6cde76781..875fa2a71c89c3d800c35b488badc611fd118b87 100644 (file)
--- a/include/babeltrace2/version.h
+++ b/include/babeltrace2/version.h
@@ -31,11 +31,73 @@
 extern "C" {
 #endif
 
-extern int bt_version_get_major(void);
-extern int bt_version_get_minor(void);
-extern int bt_version_get_patch(void);
+/*!
+@defgroup api-version Library version
+
+@brief
+    Library version getters.
+
+This module contains four functions to get the four parts of the
+library's version:
+
+<dl>
+  <dt>Major version</dt>
+  <dd>bt_version_get_major()</dd>
+
+  <dt>Minor version</dt>
+  <dd>bt_version_get_minor()</dd>
+
+  <dt>Patch version</dt>
+  <dd>bt_version_get_patch()</dd>
+
+  <dt>Extra information</dt>
+  <dd>bt_version_get_extra()</dd>
+</dl>
+*/
+
+/*! @{ */
+
+/*!
+@brief
+    Returns the major version of libbabeltrace2.
+
+@returns
+    Major version of the library.
+*/
+extern unsigned int bt_version_get_major(void);
+
+/*!
+@brief
+    Returns the minor version of libbabeltrace2.
+
+@returns
+    Minor version of the library.
+*/
+extern unsigned int bt_version_get_minor(void);
+
+/*!
+@brief
+    Returns the patch version of libbabeltrace2.
+
+@returns
+    Patch version of the library.
+*/
+extern unsigned int bt_version_get_patch(void);
+
+/*!
+@brief
+    Returns extra information about the version of libbabeltrace2.
+
+This extra information can contain a version suffix such as
+<code>-pre5</code> or <code>-rc1</code>.
+
+@returns
+    Extra information about the library's version, or \c NULL if none.
+*/
 extern const char *bt_version_get_extra(void);
 
+/*! @} */
+
 #ifdef __cplusplus
 }
 #endif