tag	line	file	source code
isupper	31	include/linux/ctype.h	#define tolower(c) (_ctmp=c,isupper(_ctmp)?_ctmp-('A'-'a'):_ctmp)
isupper	213	zBoot/gzip.h	#define tolow(c)  (isupper(c) ? (c)-'A'+'a' : (c))    /* force to lower case */