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1 | /* Copyright (c) 1979 Regents of the University of California */ |
2 | ||
4b9ccde7 | 3 | static char sccsid[] = "@(#)IN.c 1.2 3/7/81"; |
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4 | |
5 | #include "h00vars.h" | |
6 | ||
492cc5d3 | 7 | bool |
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8 | IN(element, lower, upper, setptr) |
9 | ||
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10 | long element; /* element to check */ |
11 | long lower; /* lowest element of set */ | |
12 | long upper; /* upper - lower of set */ | |
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13 | char setptr[]; /* pointer to set */ |
14 | { | |
492cc5d3 | 15 | register int indx; |
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16 | |
17 | if ((indx = element - lower) < 0 || indx > upper) | |
18 | return FALSE; | |
492cc5d3 | 19 | if (setptr[indx >> LG2BITSBYTE] & (1 << (indx & MSKBITSBYTE))) |
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20 | return TRUE; |
21 | return FALSE; | |
22 | } |