GCC中运用枚举定义数组的实例

enum uaddr {
	MTD_UADDR_NOT_SUPPORTED = 0,	/* data width not supported */
	MTD_UADDR_0x0555_0x02AA,
	MTD_UADDR_0x0555_0x0AAA,
	MTD_UADDR_0x5555_0x2AAA,
	MTD_UADDR_0x0AAA_0x0555,
	MTD_UADDR_DONT_CARE,		/* Requires an arbitrary address */
	MTD_UADDR_UNNECESSARY,		/* Does not require any address */
};

struct unlock_addr {
	u32 addr1;
	u32 addr2;
};

/*
 * I don't like the fact that the first entry in unlock_addrs[]
 * exists, but is for MTD_UADDR_NOT_SUPPORTED - and, therefore,
 * should not be used.  The  problem is that structures with
 * initializers have extra fields initialized to 0.  It is _very_
 * desireable to have the unlock address entries for unsupported
 * data widths automatically initialized - that means that
 * MTD_UADDR_NOT_SUPPORTED must be 0 and the first entry here
 * must go unused.
 */
static const struct unlock_addr  unlock_addrs[] = {
	[MTD_UADDR_NOT_SUPPORTED] = {
		.addr1 = 0xffff,
		.addr2 = 0xffff
	},

	[MTD_UADDR_0x0555_0x02AA] = {
		.addr1 = 0x0555,
		.addr2 = 0x02aa
	},

	[MTD_UADDR_0x0555_0x0AAA] = {
		.addr1 = 0x0555,
		.addr2 = 0x0aaa
	},

	[MTD_UADDR_0x5555_0x2AAA] = {
		.addr1 = 0x5555,
		.addr2 = 0x2aaa
	},

	[MTD_UADDR_0x0AAA_0x0555] = {
		.addr1 = 0x0AAA,
		.addr2 = 0x0555
	},

	[MTD_UADDR_DONT_CARE] = {
		.addr1 = 0x0000,      /* Doesn't matter which address */
		.addr2 = 0x0000       /* is used - must be last entry */
	},

	[MTD_UADDR_UNNECESSARY] = {
		.addr1 = 0x0000,
		.addr2 = 0x0000
	}
};