ctype.h

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#ifndef _CTYPE_H
#define _CTYPE_H
 
#include <types.h>
#include <stdbool.h>
 
bool isalpha(char c);
 
bool isupper(char c);
 
bool islower(char c);
 
bool isdigit(char c);
 
bool isspace(char c);
 
char toupper(char c);
 
char tolower(char c);
 
#endif /* _CTYPE_H */