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16 | DESCRIPTION |
16 | DESCRIPTION |
17 | < |
17 | < |
18 | lookup. It is a predicate returning non-zero for control characters, and 0 |
18 | lookup. It is a predicate returning non-zero for control characters, and 0 |
19 | for other characters. It is defined only when < |
19 | for other characters. It is defined only if <[c]> is representable as an |
20 | true or <[c]> is EOF. |
20 | unsigned char or if <[c]> is EOF. |
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21 | 21 | ||
22 | You can use a compiled subroutine instead of the macro definition by |
22 | You can use a compiled subroutine instead of the macro definition by |
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23 | undefining the macro using `<<#undef iscntrl>>'. |
23 | undefining the macro using `<<#undef iscntrl>>'. |