51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/*
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FUNCTION
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<<isascii>>, <<isascii_l>>---ASCII character predicate
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INDEX
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isascii
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INDEX
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isascii_l
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SYNOPSIS
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#include <ctype.h>
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int isascii(int <[c]>);
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#include <ctype.h>
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int isascii_l(int <[c]>, locale_t <[locale]>);
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DESCRIPTION
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<<isascii>> is a macro which returns non-zero when <[c]> is an ASCII
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character, and 0 otherwise. It is defined for all integer values.
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<<isascii_l>> is like <<isascii>> 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 isascii>>' or `<<#undef isascii_l>>'.
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RETURNS
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<<isascii>>, <<isascii_l>> return non-zero if the low order byte of <[c]>
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is in the range 0 to 127 (<<0x00>>--<<0x7F>>).
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PORTABILITY
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<<isascii>> is ANSI C.
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<<isascii_l>> is a GNU extension.
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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 isascii
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int
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isascii (int c)
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{
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return c >= 0 && c< 128;
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}
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