From 761975d47b4e8536df837f999642430d19087b79 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Mon, 24 Feb 2014 23:02:20 +0100
Subject: [PATCH] command: fix loadfile command

This was broken by commit bb6b543812a724. Note that the original pull
request was fine, but it was broken by my own stupidity when I was
"improving" it.

The problem is that the new loadfile argument was not considered
optional anymore after my changes. The original pull request did handle
this by setting .defval to a dummy value, but I removed that part.

Fix it again by introducing a flag that designates that the parameter is
optional. (I didn't want to add it to m_option.h, because technically,
all options are optional, and it's not possible to have non-optional
options.)
---
 input/cmd_list.c  | 2 +-
 input/cmd_list.h  | 2 ++
 input/cmd_parse.c | 5 +++--
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/input/cmd_list.c b/input/cmd_list.c
index 982d4f366c..4fd5331631 100644
--- a/input/cmd_list.c
+++ b/input/cmd_list.c
@@ -122,7 +122,7 @@ const struct mp_cmd_def mp_cmds[] = {
       ARG_STRING,
       OARG_CHOICE(0, ({"replace", 0},          {"0", 0},
                       {"append", 1},           {"1", 1})),
-      OPT_KEYVALUELIST(ARG(str_list), 0),
+      OPT_KEYVALUELIST(ARG(str_list), MP_CMD_OPT_ARG),
   }},
   { MP_CMD_LOADLIST, "loadlist", {
       ARG_STRING,
diff --git a/input/cmd_list.h b/input/cmd_list.h
index e74a21921e..9a3c25018f 100644
--- a/input/cmd_list.h
+++ b/input/cmd_list.h
@@ -24,6 +24,8 @@
 
 #define MP_CMD_MAX_ARGS 10
 
+#define MP_CMD_OPT_ARG 0x1000
+
 struct mp_cmd_def {
     int id;             // one of MP_CMD_...
     const char *name;   // user-visible name (as used in input.conf)
diff --git a/input/cmd_parse.c b/input/cmd_parse.c
index e2296ce215..64b23ac05f 100644
--- a/input/cmd_parse.c
+++ b/input/cmd_parse.c
@@ -199,10 +199,11 @@ static struct mp_cmd *parse_cmd(struct parse_ctx *ctx, int def_flags)
             if (is_vararg)
                 continue;
             // Skip optional arguments
-            if (opt->defval) {
+            if (opt->defval || (opt->flags & MP_CMD_OPT_ARG)) {
                 struct mp_cmd_arg *cmdarg = &cmd->args[cmd->nargs];
                 cmdarg->type = opt;
-                m_option_copy(opt, &cmdarg->v, opt->defval);
+                if (opt->defval)
+                    m_option_copy(opt, &cmdarg->v, opt->defval);
                 cmd->nargs++;
                 continue;
             }