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Last change
on this file since 444 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.0 KB
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| 1 | /* |
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| 2 | FUNCTION |
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| 3 | <<isblank>>, <<isblank_l>>---blank character predicate |
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| 4 | |
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| 5 | INDEX |
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| 6 | isblank |
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| 7 | |
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| 8 | INDEX |
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| 9 | isblank_l |
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| 10 | |
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| 11 | SYNOPSIS |
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| 12 | #include <ctype.h> |
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| 13 | int isblank(int <[c]>); |
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| 14 | |
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| 15 | #include <ctype.h> |
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| 16 | int isblank_l(int <[c]>, locale_t <[locale]>); |
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| 17 | |
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| 18 | DESCRIPTION |
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| 19 | <<isblank>> is a function which classifies singlebyte charset values by table |
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| 20 | lookup. It is a predicate returning non-zero for blank characters, and 0 |
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| 21 | for other characters. It is defined only if <[c]> is representable as an |
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| 22 | unsigned char or if <[c]> is EOF. |
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| 23 | |
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| 24 | <<isblank_l>> is like <<isblank>> but performs the check based on the |
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| 25 | locale specified by the locale object locale. If <[locale]> is |
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| 26 | LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined. |
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| 27 | |
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| 28 | RETURNS |
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| 29 | <<isblank>>, <<isblank_l>> return non-zero if <[c]> is a blank character. |
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| 30 | |
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| 31 | PORTABILITY |
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| 32 | <<isblank>> is C99. |
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| 33 | <<isblank_l>> is POSIX-1.2008. |
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| 34 | |
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| 35 | No supporting OS subroutines are required. |
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| 36 | */ |
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| 37 | |
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| 38 | #include <_ansi.h> |
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| 39 | #include <ctype.h> |
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| 40 | |
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| 41 | |
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| 42 | |
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| 43 | #undef isblank |
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| 44 | int |
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| 45 | isblank (int c) |
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| 46 | { |
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| 47 | return ((__CTYPE_PTR[c+1] & _B) || (c == '\t')); |
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| 48 | } |
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