43 lines
1000 B
C
43 lines
1000 B
C
/*
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FUNCTION
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<<isupper_l>>---uppercase character predicate
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INDEX
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isupper_l
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ANSI_SYNOPSIS
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#include <ctype.h>
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int isupper_l(int <[c]>, locale_t <[locale]>);
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DESCRIPTION
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<<isupper_l>> is a macro which classifies ASCII integer values by table
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lookup in locale <[locale]>. It is a predicate returning non-zero for
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uppercase letters (<<A>>--<<Z>>), and 0 for other characters. It is
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defined only when <<isascii>>(<[c]>) is true or <[c]> is EOF.
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if <[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 the macro using `<<#undef isupper_l>>'.
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RETURNS
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<<isupper_l>> returns non-zero if <[c]> is a uppercase letter (A-Z).
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PORTABILITY
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<<isupper_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 isupper_l
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int
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isupper_l (int c, struct __locale_t *locale)
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{
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return (__locale_ctype_ptr_l (locale)[c+1] & (_U|_L)) == _U;
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}
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