vty: Change API to have node installation be done by int

We are mixing enums and hope that no short-enums are used. This
is leading to a lot compiler warnings generated by clang. Change
the API to work with integers.

Porting:
The go_parent_cb implementations in the applications need to be
fixed. The API change leads to a compile time warning.

Fixes:
abis_om2000_vty.c:46:2: warning: implicit conversion from enumeration type 'enum bsc_vty_node' to
      different enumeration type 'enum node_type' [-Wenum-conversion]
        OM2K_NODE,
        ^~~~~~~~~

4 files changed, 11 insertions, 10 deletions

diff --git a/TODO-RELEASE b/TODO-RELEASE
index 43b1e8ef..4f65caba 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -1 +1,2 @@
 #library	what		description / commit summary line
+libosmovty	abi-change	vty: Change API to have node installation be done by int
diff --git a/include/osmocom/vty/command.h b/include/osmocom/vty/command.h
index 89dc28fc..4eb519f6 100644
--- a/include/osmocom/vty/command.h
+++ b/include/osmocom/vty/command.h
@@ -92,7 +92,7 @@ enum node_type {
  * configuration function pointer . */
 struct cmd_node {
 	/*! \brief Node index */
-	enum node_type node;
+	int node;
 
 	/*! \brief Prompt character at vty interface. */
 	const char *prompt;
@@ -334,15 +334,15 @@ struct desc {
 
 /* Prototypes. */
 void install_node(struct cmd_node *, int (*)(struct vty *));
-void install_default(enum node_type);
-void install_element(enum node_type, struct cmd_element *);
+void install_default(int node_type);
+void install_element(int node_type, struct cmd_element *);
 void install_element_ve(struct cmd_element *cmd);
 void sort_node(void);
 
 /* This is similar to install_default() but it also creates
  * 'exit' and 'end' commands.
  */
-void vty_install_default(enum node_type);
+void vty_install_default(int node_type);
 
 /* Concatenates argv[shift] through argv[argc-1] into a single NUL-terminated
    string with a space between each element (allocated using
diff --git a/include/osmocom/vty/vty.h b/include/osmocom/vty/vty.h
index 1dcc2300..36843974 100644
--- a/include/osmocom/vty/vty.h
+++ b/include/osmocom/vty/vty.h
@@ -156,7 +156,7 @@ struct vty_app_info {
 	/*! \brief \ref talloc context */
 	void *tall_ctx;
 	/*! \brief call-back for returning to parent n ode */
-	enum node_type (*go_parent_cb)(struct vty *vty);
+	int (*go_parent_cb)(struct vty *vty);
 	/*! \brief call-back to determine if node is config node */
 	int (*is_config_node)(struct vty *vty, int node);
 	/*! \brief Check if the config is consistent before write */
@@ -184,7 +184,7 @@ int vty_shell_serv (struct vty *);
 void vty_hello (struct vty *);
 void *vty_current_index(struct vty *);
 int vty_current_node(struct vty *vty);
-enum node_type vty_go_parent(struct vty *vty);
+int vty_go_parent(struct vty *vty);
 
 extern void *tall_vty_ctx;
 
diff --git a/src/vty/command.c b/src/vty/command.c
index 3ff5f775..290b12d8 100644
--- a/src/vty/command.c
+++ b/src/vty/command.c
@@ -548,7 +548,7 @@ static int vty_dump_nodes(struct vty *vty)
  *  \param[in] ntype Node Type
  *  \param[cmd] element to be installed
  */
-void install_element(enum node_type ntype, struct cmd_element *cmd)
+void install_element(int ntype, struct cmd_element *cmd)
 {
 	struct cmd_node *cnode;
 
@@ -1897,7 +1897,7 @@ char **cmd_complete_command(vector vline, struct vty *vty, int *status)
  * Note also that this function relies on the is_config_child callback to
  * recognize non-config nodes if go_parent_cb is not set.
  */
-enum node_type vty_go_parent(struct vty *vty)
+int vty_go_parent(struct vty *vty)
 {
 	switch (vty->node) {
 		case AUTH_NODE:
@@ -3319,7 +3319,7 @@ void host_config_set(const char *filename)
 	host.config = talloc_strdup(tall_vty_cmd_ctx, filename);
 }
 
-void install_default(enum node_type node)
+void install_default(int node)
 {
 	install_element(node, &config_help_cmd);
 	install_element(node, &config_list_cmd);
@@ -3331,7 +3331,7 @@ void install_default(enum node_type node)
 	install_element(node, &show_running_config_cmd);
 }
 
-void vty_install_default(enum node_type node)
+void vty_install_default(int node)
 {
 	install_default(node);