plan9fox/sys/include/ctype.h

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#pragma src "/sys/src/libc/port"
#pragma lib "libc.a"
#define _U 01
#define _L 02
#define _N 04
#define _S 010
#define _P 020
#define _C 040
#define _B 0100
#define _X 0200
extern unsigned char _ctype[];
#define isalpha(c) (_ctype[(unsigned char)(c)]&(_U|_L))
#define isupper(c) (_ctype[(unsigned char)(c)]&_U)
#define islower(c) (_ctype[(unsigned char)(c)]&_L)
#define isdigit(c) (_ctype[(unsigned char)(c)]&_N)
#define isxdigit(c) (_ctype[(unsigned char)(c)]&_X)
#define isspace(c) (_ctype[(unsigned char)(c)]&_S)
#define ispunct(c) (_ctype[(unsigned char)(c)]&_P)
#define isalnum(c) (_ctype[(unsigned char)(c)]&(_U|_L|_N))
#define isprint(c) (_ctype[(unsigned char)(c)]&(_P|_U|_L|_N|_B))
#define isgraph(c) (_ctype[(unsigned char)(c)]&(_P|_U|_L|_N))
#define iscntrl(c) (_ctype[(unsigned char)(c)]&_C)
#define isascii(c) ((unsigned char)(c)<=0177)
#define _toupper(c) ((c)-'a'+'A')
#define _tolower(c) ((c)-'A'+'a')
#define toascii(c) ((c)&0177)