[3ae31e9] | 1 | /**
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| 2 | *
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| 3 | * This header file defines various ASCII character manipulation macros,
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| 4 | * as follows:
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| 5 | *
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| 6 | * isalpha(c) non-zero if c is alpha
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| 7 | * isupper(c) non-zero if c is upper case
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| 8 | * islower(c) non-zero if c is lower case
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| 9 | * isdigit(c) non-zero if c is a digit (0 to 9)
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| 10 | * isxdigit(c) non-zero if c is a hexadecimal digit (0 to 9, A to F,
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| 11 | * a to f)
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| 12 | * isspace(c) non-zero if c is white space
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| 13 | * ispunct(c) non-zero if c is punctuation
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| 14 | * isalnum(c) non-zero if c is alpha or digit
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| 15 | * isprint(c) non-zero if c is printable (including blank)
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| 16 | * isgraph(c) non-zero if c is graphic (excluding blank)
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| 17 | * iscntrl(c) non-zero if c is control character
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| 18 | * isascii(c) non-zero if c is ASCII
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| 19 | * iscsym(c) non-zero if valid character for C symbols
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| 20 | * iscsymf(c) non-zero if valid first character for C symbols
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| 21 | *
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| 22 | **/
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| 23 |
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| 24 | #define _U 1 /* upper case flag */
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| 25 | #define _L 2 /* lower case flag */
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| 26 | #define _N 4 /* number flag */
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| 27 | #define _S 8 /* space flag */
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| 28 | #define _P 16 /* punctuation flag */
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| 29 | #define _C 32 /* control character flag */
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| 30 | #define _B 64 /* blank flag */
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| 31 | #define _X 128 /* hexadecimal flag */
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| 32 |
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| 33 | extern char _ctype[]; /* character type table */
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| 34 |
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| 35 | #define isalpha(c) (_ctype[(c)+1]&(_U|_L))
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| 36 | #define isupper(c) (_ctype[(c)+1]&_U)
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| 37 | #define islower(c) (_ctype[(c)+1]&_L)
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| 38 | #define isdigit(c) (_ctype[(c)+1]&_N)
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| 39 | #define isxdigit(c) (_ctype[(c)+1]&_X)
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| 40 | #define isspace(c) (_ctype[(c)+1]&_S)
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| 41 | #define ispunct(c) (_ctype[(c)+1]&_P)
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| 42 | #define isalnum(c) (_ctype[(c)+1]&(_U|_L|_N))
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| 43 | #define isprint(c) (_ctype[(c)+1]&(_P|_U|_L|_N|_B))
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| 44 | #define isgraph(c) (_ctype[(c)+1]&(_P|_U|_L|_N))
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| 45 | #define iscntrl(c) (_ctype[(c)+1]&_C)
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| 46 | #define isascii(c) ((unsigned)(c)<=127)
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| 47 | #define iscsym(c) (isalnum(c)||(((c)&127)==0x5f))
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| 48 | #define iscsymf(c) (isalpha(c)||(((c)&127)==0x5f))
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| 49 |
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| 50 | #define toupper(c) (islower(c)?((c)-('a'-'A')):(c))
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| 51 | #define tolower(c) (isupper(c)?((c)+('a'-'A')):(c))
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| 52 | #define toascii(c) ((c)&127)
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