1 #include <ctype.h> 2 isalnum(int c)3 int isalnum(int c) 4 { 5 return isalpha(c) || isdigit(c); 6 } 7 __isalnum_l(int c,locale_t l)8 int __isalnum_l(int c, locale_t l) 9 { 10 return isalnum(c); 11 } 12 13 weak_alias(__isalnum_l, isalnum_l); 14