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@@ -56,13 +56,55 @@
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#define CONFIG_VAL(option) config_val(option)
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/*
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- * CONFIG_IS_ENABLED(FOO) evaluates to
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+ * Count number of arguments to a variadic macro. Currently only need
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+ * it for 1, 2 or 3 arguments.
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+ */
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+#define __arg6(a1, a2, a3, a4, a5, a6, ...) a6
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+#define __count_args(...) __arg6(dummy, ##__VA_ARGS__, 4, 3, 2, 1, 0)
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+
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+#define __concat(a, b) ___concat(a, b)
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+#define ___concat(a, b) a ## b
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+
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+#define __unwrap(...) __VA_ARGS__
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+#define __unwrap1(case1, case0) __unwrap case1
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+#define __unwrap0(case1, case0) __unwrap case0
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+
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+#define __CONFIG_IS_ENABLED_1(option) __CONFIG_IS_ENABLED_3(option, (1), (0))
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+#define __CONFIG_IS_ENABLED_2(option, case1) __CONFIG_IS_ENABLED_3(option, case1, ())
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+#define __CONFIG_IS_ENABLED_3(option, case1, case0) \
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+ __concat(__unwrap, config_enabled(CONFIG_VAL(option))) (case1, case0)
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+
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+/*
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+ * CONFIG_IS_ENABLED(FOO) expands to
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* 1 if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
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* 1 if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
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* 1 if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
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* 0 otherwise.
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+ *
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+ * CONFIG_IS_ENABLED(FOO, (abc)) expands to
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+ * abc if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
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+ * abc if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
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+ * abc if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
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+ * nothing otherwise.
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+ *
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+ * CONFIG_IS_ENABLED(FOO, (abc), (def)) expands to
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+ * abc if CONFIG_SPL_BUILD is undefined and CONFIG_FOO is set to 'y',
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+ * abc if CONFIG_SPL_BUILD is defined and CONFIG_SPL_FOO is set to 'y',
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+ * abc if CONFIG_TPL_BUILD is defined and CONFIG_TPL_FOO is set to 'y',
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+ * def otherwise.
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+ *
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+ * The optional second and third arguments must be parenthesized; that
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+ * allows one to include a trailing comma, e.g. for use in
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+ *
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+ * CONFIG_IS_ENABLED(ACME, ({.compatible = "acme,frobnozzle"},))
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+ *
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+ * which adds an entry to the array being defined if CONFIG_ACME (or
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+ * CONFIG_SPL_ACME/CONFIG_TPL_ACME, depending on build context) is
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+ * set, and nothing otherwise.
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*/
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-#define CONFIG_IS_ENABLED(option) \
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- (config_enabled(CONFIG_VAL(option)))
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+
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+#define CONFIG_IS_ENABLED(option, ...) \
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+ __concat(__CONFIG_IS_ENABLED_, __count_args(option, ##__VA_ARGS__)) (option, ##__VA_ARGS__)
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+
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#endif /* __LINUX_KCONFIG_H */
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