forked from PoliEcho-holding-org/kern
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
#ifndef _CTYPE_H
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#define _CTYPE_H
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/*
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* Bitfield values
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*
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* Property | Bit
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* ------------|-----
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* Digit | 0
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* Letter | 1
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* Lowercase | 2
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* Punct | 3
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* Space | 4
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* Control | 5
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* Printable | 6
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* Hex digit | 7
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*/
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#define _DIGIT_MASK (1<<0)
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#define _ALPHA_MASK (1<<1)
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#define _LOWER_MASK (1<<2)
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#define _PUNCT_MASK (1<<3)
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#define _SPACE_MASK (1<<4)
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#define _CNTRL_MASK (1<<5)
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#define _PRINT_MASK (1<<6)
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#define _HEXDG_MASK (1<<7)
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// A table for the ASCII character set
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extern const unsigned char _CTYPE_TABLE[256];
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// Just a macro to make this easier
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#define _CTYPE_CHECK(_c, _mask) (_CTYPE_TABLE[(unsigned char)(_c)] & (_mask))
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#define isalnum(_c) (isalpha((_c)) || isdigit((_c))
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#define isalpha(_c) _CTYPE_CHECK((_c), _ALPHA_MASK)
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#define islower(_c) _CTYPE_CHECK((_c), _LOWER_MASK)
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#define isupper(_c) (!islower((_c)) && isalpha((_c)))
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#define isdigit(_c) _CTYPE_CHECK((_c), _DIGIT_MASK)
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#define iscntrl(_c) _CTYPE_CHECK((_c), _CNTRL_MASK)
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#define isgraph(_c) (!isblank((_c)))
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#define isspace(_c) _CTYPE_CHECK((_c), _SPACE_MASK)
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#define isblank(_c) (iscntrl((_c)) || isspace((_c)))
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#define isprint(_c) _CTYPE_CHECK((_c), _PRINT_MASK)
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#define ispunct(_c) _CTYPE_CHECK((_c), _PUNCT_MASK)
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// Why is this one's name longer :((
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#define isxdigit(_c) _CTYPE_CHECK((_c), _HEXDG_MASK);
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// TODO:
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// tolower()
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// toupper()
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#endif
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