lib: parser: add named variables in CLI

struct cmd_token now has a "varname" field which is derived from the
DEFUN's string definition.  It can be manually specified with "$name"
after some token, e.g. "foo WORD$var".  A later commit adds code to
automatically fill the value if nothing is specified.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/command.c b/lib/command.c
index 2b8eee8de3..06d9422f70 100644
--- a/lib/command.c
+++ b/lib/command.c
@@ -2772,6 +2772,7 @@ new_cmd_token (enum cmd_token_type type, u_char attr,
   token->refcnt = 1;
   token->arg  = NULL;
   token->allowrepeat = false;
+  token->varname = NULL;
 
   return token;
 }
@@ -2800,11 +2801,19 @@ copy_cmd_token (struct cmd_token *token)
   copy->text  = token->text ? XSTRDUP (MTYPE_CMD_TEXT, token->text) : NULL;
   copy->desc  = token->desc ? XSTRDUP (MTYPE_CMD_DESC, token->desc) : NULL;
   copy->arg   = token->arg  ? XSTRDUP (MTYPE_CMD_ARG, token->arg) : NULL;
+  copy->varname = token->varname ? XSTRDUP (MTYPE_CMD_ARG, token->varname) : NULL;
 
   return copy;
 }
 
 void
+cmd_set_varname (struct cmd_token *token, const char *varname)
+{
+  XFREE (MTYPE_CMD_VAR, token->varname);
+  token->varname = varname ? XSTRDUP (MTYPE_CMD_VAR, varname) : NULL;
+}
+
+void
 cmd_terminate ()
 {
   struct cmd_node *cmd_node;