-#ifndef LIB_CTYPE_H
-#define LIB_CTYPE_H 1
+#ifndef __LIB_CTYPE_H
+#define __LIB_CTYPE_H
static inline int islower (int c) { return c >= 'a' && c <= 'z'; }
static inline int isupper (int c) { return c >= 'A' && c <= 'Z'; }
return (c == ' ' || c == '\f' || c == '\n'
|| c == '\r' || c == '\t' || c == '\v');
}
+static inline int isblank (int c) { return c == ' ' || c == '\t'; }
static inline int isgraph (int c) { return c >= 33 && c < 127; }
static inline int isprint (int c) { return c >= 32 && c < 127; }
static inline int iscntrl (int c) { return c >= 0 && c < 32; }
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 */