1 files changed, 71 insertions, 0 deletions
diff --git a/arch/sandbox/include/asm/getopt.h b/arch/sandbox/include/asm/getopt.h
new file mode 100644
index 0000000..685883c
--- /dev/null
+++ b/arch/sandbox/include/asm/getopt.h
@@ -0,0 +1,71 @@
+/*
+ * Code for setting up command line flags like `./u-boot --help`
+ *
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __SANDBOX_GETOPT_H
+#define __SANDBOX_GETOPT_H
+
+struct sandbox_state;
+
+/*
+ * Internal structure for storing details about the flag.
+ * Most people should not have to dig around in this as
+ * it only gets parsed by the core sandbox code.  End
+ * consumer code should focus on the macros below and
+ * the callback function.
+ */
+struct sb_cmdline_option {
+	/* The long flag name: "help" for "--help" */
+	const char *flag;
+	/* The (optional) short flag name: "h" for "-h" */
+	int flag_short;
+	/* The help string shown to the user when processing --help */
+	const char *help;
+	/* Whether this flag takes an argument */
+	int has_arg;
+	/* Callback into the end consumer code with the option */
+	int (*callback)(struct sandbox_state *state, const char *opt);
+};
+
+/*
+ * Internal macro to expand the lower macros into the necessary
+ * magic junk that makes this all work.
+ */
+#define _SB_CMDLINE_OPT(f, s, ha, h) \
+	static struct sb_cmdline_option sb_cmdline_option_##f = { \
+		.flag = #f, \
+		.flag_short = s, \
+		.help = h, \
+		.has_arg = ha, \
+		.callback = sb_cmdline_cb_##f, \
+	}; \
+	/* Ppointer to the struct in a special section for the linker script */ \
+	static __attribute__((section(".u_boot_sandbox_getopt"), used)) \
+		struct sb_cmdline_option *sb_cmdline_option_##f##_ptr = \
+		&sb_cmdline_option_##f
+
+/**
+ * Macros for end code to declare new command line flags.
+ *
+ * @param f   The long flag name e.g. help
+ * @param ha  Does the flag have an argument e.g. 0/1
+ * @param h   The help string displayed when showing --help
+ *
+ * This invocation:
+ *   SB_CMDLINE_OPT(foo, 0, "The foo arg");
+ * Will create a new flag named "--foo" (no short option) that takes
+ * no argument.  If the user specifies "--foo", then the callback func
+ * sb_cmdline_cb_foo() will automatically be called.
+ */
+#define SB_CMDLINE_OPT(f, ha, h) _SB_CMDLINE_OPT(f, 0, ha, h)
+/*
+ * Same as above, but @s is used to specify a short flag e.g.
+ *   SB_CMDLINE_OPT(foo, 'f', 0, "The foo arg");
+ */
+#define SB_CMDLINE_OPT_SHORT(f, s, ha, h) _SB_CMDLINE_OPT(f, s, ha, h)
+
+#endif