iso8859.h

这是一个经典的伪随机数生成程序,特别方便和实用

/* ISO 8859/1 Latin-1 "ctype" macro replacements. */

extern unsigned char isoalpha[32], isoupper[32], isolower[32];

#define isISOspace(x)	((isascii(((unsigned char) (x))) && isspace(((unsigned char) (x)))) || ((x) == 0xA0))
#define isISOalpha(x)	((isoalpha[(((unsigned char) (x))) / 8] & (0x80 >> ((((unsigned char) (x))) % 8))) != 0)
#define isISOupper(x)	((isoupper[(((unsigned char) (x))) / 8] & (0x80 >> ((((unsigned char) (x))) % 8))) != 0)
#define isISOlower(x)	((isolower[(((unsigned char) (x))) / 8] & (0x80 >> ((((unsigned char) (x))) % 8))) != 0)
#define isISOprint(x)   ((((x) >= ' ') && ((x) <= '~')) || ((x) >= 0xA0))
#define toISOupper(x)   (isISOlower(x) ? (isascii(((unsigned char) (x))) ?  \
                            toupper(x) : (((((unsigned char) (x)) != 0xDF) && \
                            (((unsigned char) (x)) != 0xFF)) ? \
			    (((unsigned char) (x)) - 0x20) : (x))) : (x))
#define toISOlower(x)   (isISOupper(x) ? (isascii(((unsigned char) (x))) ?  \
                            tolower(x) : (((unsigned char) (x)) + 0x20)) \
			    : (x))