1#include <ctype.h> 2#include "libc.h" 3#undef isalpha 4 5int isalpha(int c) 6{ 7 return ((unsigned)c|32)-'a' < 26; 8} 9 10int __isalpha_l(int c, locale_t l) 11{ 12 return isalpha(c); 13} 14 15weak_alias(__isalpha_l, isalpha_l); 16