1#ifndef BOOT_ISDIGIT_H 2 3#define BOOT_ISDIGIT_H 4 5static inline int isdigit(int ch) 6{ 7 return (ch >= '0') && (ch <= '9'); 8} 9 10static 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