23 lines
1.2 KiB
C
23 lines
1.2 KiB
C
/*****************************************************************************
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Chmacs.h
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These are tested relational expressions. The ones defined for some
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C's, like isalnum, tolower, etc do not always work, because they rely on bit
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patterns within ASCII. These work.
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Note: if this file is included, the tecoc.h file must precede it.
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*****************************************************************************/
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extern unsigned char ChrMsk[];
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#define Is_Upper(ch) (ChrMsk[(ch)] & CM_UPPER)
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#define Is_Lower(ch) (ChrMsk[(ch)] & CM_LOWER)
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#define Is_Digit(ch) (ChrMsk[(ch)] & CM_DIGIT)
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#define Is_Alpha(ch) (ChrMsk[(ch)] & (CM_UPPER | CM_LOWER))
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#define Is_Alnum(ch) (ChrMsk[(ch)] & (CM_UPPER | CM_LOWER | CM_DIGIT))
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#define To_Lower(ch) (Is_Upper(ch) ? (ch)+' ' : (ch) )
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#define To_Upper(ch) (Is_Lower(ch) ? (ch)-' ' : (ch) )
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/*****************************************************************************
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these are TECO-specific. The above are not.
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*****************************************************************************/
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/* is line terminator */
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#define IsEOL(ch) (ChrMsk[(ch)] & CM_LINE_TERM)
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/* is symbol constituent */
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#define Is_SyCon(ch) (Is_Alnum(ch) || ch == '.' || ch == '_' || ch == '$')
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