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-rw-r--r--cmd_handler.h109
1 files changed, 109 insertions, 0 deletions
diff --git a/cmd_handler.h b/cmd_handler.h
new file mode 100644
index 0000000..c4b26f4
--- /dev/null
+++ b/cmd_handler.h
@@ -0,0 +1,109 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Stage 1
+ *
+ * Define function prototypes.
+ */
+
+#undef NAME
+#define NAME(n, d, v)
+
+#undef ENTRY
+#define ENTRY(n, h, f, ...) \
+static int f(int argc, char **argv, struct command *command, struct plugin *plugin);
+
+#undef COMMAND_LIST
+#define COMMAND_LIST(args...) args
+
+#undef PLUGIN
+#define PLUGIN(name, cmds) cmds
+
+#include CMD_INCLUDE(CMD_INC_FILE)
+
+/*
+ * Stage 2
+ *
+ * Define command structures.
+ */
+
+#undef NAME
+#define NAME(n, d, v)
+
+#undef ENTRY_W_ALIAS
+#define ENTRY_W_ALIAS(n, h, f, a) \
+static struct command f ## _cmd = { \
+ .name = n, \
+ .help = h, \
+ .fn = f, \
+ .alias = a, \
+};
+
+#undef ENTRY_WO_ALIAS
+#define ENTRY_WO_ALIAS(n, h, f) \
+ ENTRY_W_ALIAS(n, h, f, NULL)
+
+#undef ENTRY_SEL
+#define ENTRY_SEL(n, h, f, a, CMD, ...) CMD
+
+#undef ENTRY
+#define ENTRY(...) \
+ ENTRY_SEL(__VA_ARGS__, ENTRY_W_ALIAS, ENTRY_WO_ALIAS)(__VA_ARGS__)
+
+#undef COMMAND_LIST
+#define COMMAND_LIST(args...) args
+
+#undef PLUGIN
+#define PLUGIN(name, cmds) cmds
+
+#include CMD_INCLUDE(CMD_INC_FILE)
+
+/*
+ * Stage 3
+ *
+ * Generate list of commands for the plugin.
+ */
+
+#undef NAME
+#define NAME(n, d, v)
+
+#undef ENTRY
+#define ENTRY(n, h, f, ...) &f ## _cmd,
+
+#undef COMMAND_LIST
+#define COMMAND_LIST(args...) \
+static struct command *commands[] = { \
+ args \
+ NULL, \
+};
+
+#undef PLUGIN
+#define PLUGIN(name, cmds) cmds
+
+#include CMD_INCLUDE(CMD_INC_FILE)
+
+/*
+ * Stage 4
+ *
+ * Define and register plugin
+ */
+
+#undef NAME
+#define NAME(n, d, v) .name = n, .desc = d, .version = v,
+
+#undef COMMAND_LIST
+#define COMMAND_LIST(args...)
+
+#undef PLUGIN
+#define PLUGIN(name, cmds) \
+static struct plugin plugin = { \
+ name \
+ .commands = commands \
+}; \
+ \
+static void init(void) __attribute__((constructor)); \
+static void init(void) \
+{ \
+ register_extension(&plugin); \
+}
+
+#include CMD_INCLUDE(CMD_INC_FILE)