72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/*
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FUNCTION
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<<isprint>>, <<isgraph>>, <<isprint_l>>, <<isgraph_l>>---printable character predicates
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INDEX
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isprint
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INDEX
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isgraph
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INDEX
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isprint_l
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INDEX
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isgraph_l
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SYNOPSIS
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#include <ctype.h>
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int isprint(int <[c]>);
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int isgraph(int <[c]>);
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#include <ctype.h>
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int isprint_l(int <[c]>, locale_t <[locale]>);
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int isgraph_l(int <[c]>, locale_t <[locale]>);
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DESCRIPTION
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<<isprint>> is a macro which classifies singlebyte charset values by table
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lookup. It is a predicate returning non-zero for printable characters,
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and 0 for other character arguments. It is defined only if <[c]> is
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representable as an unsigned char or if <[c]> is EOF.
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<<isgraph>> behaves identically to <<isprint>>, except that space characters
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are excluded.
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<<isprint_l>>, <<isgraph_l>> are like <<isprint>>, <<isgraph>> but perform
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the check based on the locale specified by the locale object locale. If
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<[locale]> is LC_GLOBAL_LOCALE or not a valid locale object, the behaviour
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is undefined.
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You can use a compiled subroutine instead of the macro definition by
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undefining either macro using `<<#undef isprint>>' or `<<#undef isgraph>>',
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or `<<#undef isprint_l>>' or `<<#undef isgraph_l>>'.
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RETURNS
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<<isprint>>, <<isprint_l>> return non-zero if <[c]> is a printing character.
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<<isgraph>>, <<isgraph_l>> return non-zero if <[c]> is a printing character
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except spaces.
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PORTABILITY
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<<isprint>> and <<isgraph>> are ANSI C.
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No supporting OS subroutines are required.
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*/
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#include <_ansi.h>
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#include <ctype.h>
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#undef isgraph
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int
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isgraph (int c)
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{
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return(__CTYPE_PTR[c+1] & (_P|_U|_L|_N));
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}
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#undef isprint
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int
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isprint (int c)
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{
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return(__CTYPE_PTR[c+1] & (_P|_U|_L|_N|_B));
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}
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