36 lines
992 B
C
36 lines
992 B
C
//---
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//
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// standard library module: ctype
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//
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// Some character manipulation.
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//
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//---
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#ifndef _CTYPE_H
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#define _CTYPE_H
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#include <stdint.h>
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extern uint8_t ctype_classes[0x80];
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// Character classes.
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#define isalnum(c) (ctype_classes[(int)(c)] & 0xf0)
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#define isalpha(c) (ctype_classes[(int)(c)] & 0x30)
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#define iscntrl(c) (ctype_classes[(int)(c)] & 0x01)
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#define isdigit(c) (ctype_classes[(int)(c)] & 0x40)
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#define isgraph(c) (ctype_classes[(int)(c)] & 0xf4)
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#define islower(c) (ctype_classes[(int)(c)] & 0x10)
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#define isprint(c) (ctype_classes[(int)(c)] & 0x08)
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#define ispunct(c) (ctype_classes[(int)(c)] & 0x04)
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#define isspace(c) (ctype_classes[(int)(c)] & 0x02)
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#define isupper(c) (ctype_classes[(int)(c)] & 0x20)
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#define isxdigit(c) (ctype_classes[(int)(c)] & 0x80)
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#define isascii(c) ((unsigned)c <= 0x7f)
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#define isblank(c) (c == '\t' || c == ' ')
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// Character manipulation.
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#define tolower(c) ((c) | isupper(c))
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#define toupper(c) ((c) & ~(islower(c) << 1))
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#endif // _CTYPE_H
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