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51 lines
1 KiB
C
51 lines
1 KiB
C
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/*
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** $Id: lctype.h,v 1.8 2009/11/19 19:06:52 roberto Exp $
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** 'ctype' functions for Lua
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** See Copyright Notice in lua.h
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*/
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#ifndef lctype_h
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#define lctype_h
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#include <limits.h>
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#include "lua.h"
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#include "llimits.h"
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#define ALPHABIT 0
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#define DIGITBIT 1
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#define PRINTBIT 2
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#define SPACEBIT 3
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#define XDIGITBIT 4
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#define UPPERBIT 5
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#define MASK(B) (1 << (B))
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/*
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** add 1 to char to allow index -1 (EOZ)
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*/
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#define testprop(c,p) (luai_ctype_[(c)+1] & (p))
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/*
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** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
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*/
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#define lislalpha(c) testprop(c, MASK(ALPHABIT))
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#define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
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#define lisupper(c) testprop(c, MASK(UPPERBIT))
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#define lisdigit(c) testprop(c, MASK(DIGITBIT))
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#define lisspace(c) testprop(c, MASK(SPACEBIT))
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#define lisprint(c) testprop(c, MASK(PRINTBIT))
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#define lisxdigit(c) testprop(c, MASK(XDIGITBIT))
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/* one more entry for 0 and one more for -1 (EOZ) */
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LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
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#endif
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