1 #ifndef BOOT_CTYPE_H 2 #define BOOT_CTYPE_H 3 4 static inline int isdigit(int ch) 5 { 6 return (ch >= '0') && (ch <= '9'); 7 } 8 9 static inline int isxdigit(int ch) 10 { 11 if (isdigit(ch)) 12 return true; 13 14 if ((ch >= 'a') && (ch <= 'f')) 15 return true; 16 17 return (ch >= 'A') && (ch <= 'F'); 18 } 19 20 #endif 21