Add tolower(), toupper().

diff --git a/src/lib/ctype.h b/src/lib/ctype.h
index 71b432cb00942477f15fde9b6cf03fa897f2d203..adc96be2ead8c05213c3d256b38fdbfa3592c2a5 100644 (file)
--- a/src/lib/ctype.h
+++ b/src/lib/ctype.h
@@ -22,4 +22,7 @@ static inline int ispunct (int c) {
   return isprint (c) && !isalnum (c) && !isspace (c);
 }
 
+static inline int tolower (int c) { return isupper (c) ? c - 'A' + 'a' : c; }
+static inline int toupper (int c) { return islower (c) ? c - 'a' + 'A' : c; }
+
 #endif /* lib/ctype.h */