libarchive: move bbunpack constants to bb_archive.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

include/bb_archive.h

@@ -250,6 +250,21 @@ int bbunpack(char **argv,
 		char* FAST_FUNC (*make_new_name)(char *filename, const char *expected_ext),
 		const char *expected_ext
 ) FAST_FUNC;
+#define BBUNPK_OPTSTR "cfkvq"
+#define BBUNPK_OPTSTRLEN  5
+#define BBUNPK_OPTSTRMASK ((1 << BBUNPK_OPTSTRLEN) - 1)
+enum {
+	BBUNPK_OPT_STDOUT     = 1 << 0,
+	BBUNPK_OPT_FORCE      = 1 << 1,
+	/* only some decompressors: */
+	BBUNPK_OPT_KEEP       = 1 << 2,
+	BBUNPK_OPT_VERBOSE    = 1 << 3,
+	BBUNPK_OPT_QUIET      = 1 << 4,
+	/* not included in BBUNPK_OPTSTR: */
+	BBUNPK_OPT_DECOMPRESS = 1 << 5,
+	BBUNPK_OPT_TEST       = 1 << 6,
+	BBUNPK_SEAMLESS_MAGIC = (1 << 31) * ENABLE_ZCAT * SEAMLESS_COMPRESSION,
+};
 
 void check_errors_in_children(int signo);
 #if BB_MMU