1 #ifndef BOOT_ISDIGIT_H 2 3 #define BOOT_ISDIGIT_H 4 5 static inline int isdigit(int ch) 6 { 7 return (ch >= '0') && (ch <= '9'); 8 } 9 10 static inline int isxdigit(int ch) 11 { 12 if (isdigit(ch)) 13 return true; 14 15 if ((ch >= 'a') && (ch <= 'f')) 16 return true; 17 18 return (ch >= 'A') && (ch <= 'F'); 19 } 20 21 #endif 22