add parsecmd to the server.

modified it to allow for commands with the same name but different nargs.
now each match list entry is preceded by an 'm', to simplify its processing.

note that this breaks the client. the next commit will fix that.

1 files changed, 22 insertions, 1 deletions

diff --git a/dat.h b/dat.h
index 7828287..dad541d 100644
--- a/dat.h
+++ b/dat.h
@@ -129,9 +129,30 @@ struct Menulist
 	char *title;
 	Rectangle r, sr;	/* content and scroll rects */
 	int high;		/* [-1,nitems) where -1 is none */
+	int off;		/* entry offset ∈ [0, nitems-Maxvisitems] */
 
 	void (*add)(Menulist*, int, char*);
 	void (*clear)(Menulist*);
-	void (*update)(Menulist*, Mousectl*);
+	int (*update)(Menulist*, Mousectl*, Channel*);
 	void (*draw)(Menulist*, Image*);
 };
+
+/*
+ * Kernel-style command parser
+ */
+typedef struct Cmdbuf Cmdbuf;
+typedef struct Cmdtab Cmdtab;
+
+struct Cmdbuf
+{
+	char	*buf;
+	char	**f;
+	int	nf;
+};
+
+struct Cmdtab
+{
+	int	index;	/* used by client to switch on result */
+	char	*cmd;	/* command name */
+	int	narg;	/* expected #args; 0 ==> variadic */
+};