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1 #ifndef _LINUX_CTYPE_H |
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2 #define _LINUX_CTYPE_H |
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3 |
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4 /* |
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5 * NOTE! This ctype does not handle EOF like the standard C |
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6 * library is required to. |
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7 */ |
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8 |
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9 #define _U 0x01 /* upper */ |
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10 #define _L 0x02 /* lower */ |
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11 #define _D 0x04 /* digit */ |
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12 #define _C 0x08 /* cntrl */ |
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13 #define _P 0x10 /* punct */ |
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14 #define _S 0x20 /* white space (space/lf/tab) */ |
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15 #define _X 0x40 /* hex digit */ |
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16 #define _SP 0x80 /* hard space (0x20) */ |
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17 |
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18 extern unsigned char _ctype[]; |
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19 |
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20 #define __ismask(x) (_ctype[(int)(unsigned char)(x)]) |
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21 |
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22 #define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0) |
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23 #define isalpha(c) ((__ismask(c)&(_U|_L)) != 0) |
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24 #define iscntrl(c) ((__ismask(c)&(_C)) != 0) |
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25 #define isdigit(c) ((__ismask(c)&(_D)) != 0) |
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26 #define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0) |
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27 #define islower(c) ((__ismask(c)&(_L)) != 0) |
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28 #define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0) |
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29 #define ispunct(c) ((__ismask(c)&(_P)) != 0) |
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30 #define isspace(c) ((__ismask(c)&(_S)) != 0) |
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31 #define isupper(c) ((__ismask(c)&(_U)) != 0) |
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32 #define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0) |
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33 |
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34 #define isascii(c) (((unsigned char)(c))<=0x7f) |
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35 #define toascii(c) (((unsigned char)(c))&0x7f) |
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36 |
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37 static inline unsigned char __tolower(unsigned char c) |
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38 { |
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39 if (isupper(c)) |
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40 c -= 'A'-'a'; |
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41 return c; |
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42 } |
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43 |
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44 static inline unsigned char __toupper(unsigned char c) |
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45 { |
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46 if (islower(c)) |
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47 c -= 'a'-'A'; |
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48 return c; |
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49 } |
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50 |
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51 #define tolower(c) __tolower(c) |
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52 #define toupper(c) __toupper(c) |
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53 |
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54 #endif |