51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/*
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FUNCTION
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<<isspace>>, <<isspace_l>>---whitespace character predicate
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INDEX
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isspace
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INDEX
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isspace_l
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SYNOPSIS
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#include <ctype.h>
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int isspace(int <[c]>);
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#include <ctype.h>
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int isspace_l(int <[c]>, locale_t <[locale]>);
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DESCRIPTION
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<<isspace>> is a macro which classifies singlebyte charset values by table
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lookup. It is a predicate returning non-zero for whitespace
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characters, and 0 for other characters. It is defined only when <<isascii>>(<[c]>) is true or <[c]> is EOF.
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<<isspace_l>> is like <<isspace>> but performs the check based on the
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locale specified by the locale object locale. If <[locale]> is
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LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
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You can use a compiled subroutine instead of the macro definition by
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undefining the macro using `<<#undef isspace>>' or `<<#undef isspace_l>>'.
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RETURNS
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<<isspace>>, <<isspace_l>> return non-zero if <[c]> is a space, tab,
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carriage return, new line, vertical tab, or formfeed (<<0x09>>--<<0x0D>>,
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<<0x20>>), or one of the other space characters in non-ASCII charsets.
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PORTABILITY
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<<isspace>> is ANSI C.
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<<isspace_l>> is POSIX-1.2008.
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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 isspace
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int
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isspace (int c)
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{
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return(__CTYPE_PTR[c+1] & _S);
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}
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