#ifndef _CTYPE_H
#define _CTYPE_H

static inline int isdigit(int c) { return c >= '0' && c <= '9'; }
static inline int islower(int c) { return c >= 'a' && c <= 'z'; }
static inline int isupper(int c) { return c >= 'A' && c <= 'Z'; }
static inline int isalpha(int c) { return islower(c) || isupper(c); }
static inline int isalnum(int c) { return isalpha(c) || isdigit(c); }
static inline int isspace(int c) { return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v'; }
static inline int isxdigit(int c) { return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F'); }
static inline int isprint(int c) { return c >= 32 && c < 127; }

static inline int toupper(int c) { return islower(c) ? (c - 'a' + 'A') : c; }
static inline int tolower(int c) { return isupper(c) ? (c - 'A' + 'a') : c; }

#endif
