ctype.h

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#ifndef _MSL_COMMON_CTYPE_H
#define _MSL_COMMON_CTYPE_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define EOF -1L
 
extern unsigned char __ctype_map[];
extern unsigned char __lower_map[];
extern unsigned char __upper_map[];
 
#define __control_char 0x01
#define __motion_char 0x02
#define __space_char 0x04
#define __punctuation 0x08
#define __digit 0x10
#define __hex_digit 0x20
#define __lower_case 0x40
#define __upper_case 0x80
 
#define __letter (__lower_case | __upper_case)
#define __alphanumeric (__letter | __digit)
#define __graphic (__alphanumeric | __punctuation)
#define __printable (__graphic | __space_char)
#define __whitespace (__motion_char | __space_char)
#define __control (__motion_char | __control_char)
#define __zero_fill(c) ((int)(unsigned char)(c))
 
int tolower(int);
 
inline int isalpha(int c) { return (int)(__ctype_map[(unsigned char)c] & __letter); }
inline int isdigit(int c) { return (int)(__ctype_map[(unsigned char)c] & __digit); }
inline int isspace(int c) { return (int)(__ctype_map[(unsigned char)c] & __whitespace); }
inline int isupper(int c) { return (int)(__ctype_map[(unsigned char)c] & __upper_case); }
inline int isxdigit(int c) { return (int)(__ctype_map[(unsigned char)c] & __hex_digit); }
// added underscore to avoid naming conflicts
inline int _tolower(int c) { return (c == -1 ? -1 : (int)__lower_map[(unsigned char)c]); }
inline int toupper(int c) { return (c == -1 ? -1 : (int)__upper_map[(unsigned char)c]); }
 
#ifdef __cplusplus
}
#endif
 
#endif /* _MSL_COMMON_CTYPE_H */