Rev 4874 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 1 | /* |
2 | FUNCTION |
||
3 | < |
||
4 | |||
5 | INDEX |
||
6 | isalnum |
||
7 | |||
8 | ANSI_SYNOPSIS |
||
9 | #include |
||
10 | int isalnum(int <[c]>); |
||
11 | |||
12 | TRAD_SYNOPSIS |
||
13 | #include |
||
14 | int isalnum(<[c]>); |
||
15 | |||
16 | |||
17 | DESCRIPTION |
||
18 | < |
||
19 | lookup. It is a predicate returning non-zero for alphabetic or |
||
20 | numeric ASCII characters, and <<0>> for other arguments. It is defined |
||
4921 | Serge | 21 | only if <[c]> is representable as an unsigned char or if <[c]> is EOF. |
4349 | Serge | 22 | |
23 | You can use a compiled subroutine instead of the macro definition by |
||
24 | undefining the macro using `<<#undef isalnum>>'. |
||
25 | |||
26 | RETURNS |
||
27 | < |
||
28 | <>--< |
||
29 | |||
30 | PORTABILITY |
||
31 | < |
||
32 | |||
33 | No OS subroutines are required. |
||
34 | */ |
||
35 | |||
36 | #include <_ansi.h> |
||
37 | #include |
||
38 | |||
39 | #undef isalnum |
||
40 | |||
41 | int |
||
42 | _DEFUN(isalnum,(c),int c) |
||
43 | { |
||
44 | return(__ctype_ptr__[c+1] & (_U|_L|_N)); |
||
45 | } |
||
46 |