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Last change
on this file was
8319,
checked in by westram, 14 years ago
|
- ignored PERL2ARB interface as referrer (to detect functions that are only used from perl)
- moved several functions to static scope or removed them (partly reverted by [13155])
- for some functions it's ok to be only used from perl (e.g. macro support functions). Added comments there!
- there is still some dead code in there, e.g.
- read-security is implemented, but unused (and unwanted)
|
-
Property svn:eol-style set to
native
-
Property svn:keywords set to
Author Date Id Revision
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File size:
1.6 KB
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| 1 | // =============================================================== // |
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| 2 | // // |
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| 3 | // File : admath.cxx // |
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| 4 | // Purpose : // |
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| 5 | // // |
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| 6 | // Institute of Microbiology (Technical University Munich) // |
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| 7 | // http://www.arb-home.de/ // |
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| 8 | // // |
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| 9 | // =============================================================== // |
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| 10 | |
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| 11 | #include <cmath> |
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| 12 | #include <ctime> |
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| 13 | |
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| 14 | #include "gb_local.h" |
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| 15 | |
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| 16 | double GB_log_fak(int n) { |
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| 17 | // returns log(n!) |
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| 18 | static int max_n = 0; |
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| 19 | static double *res = 0; |
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| 20 | |
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| 21 | if (n<=1) return 0.0; // log 1 = 0 |
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| 22 | |
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| 23 | if (n >= max_n) { |
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| 24 | double sum = 0; |
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| 25 | int i; |
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| 26 | freenull(res); |
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| 27 | max_n = n + 100; |
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| 28 | res = (double *)GB_calloc(sizeof(double), max_n); |
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| 29 | for (i=1; i<max_n; i++) { |
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| 30 | sum += log((double)i); |
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| 31 | res[i] = sum; |
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| 32 | } |
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| 33 | } |
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| 34 | return res[n]; |
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| 35 | } |
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| 36 | |
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| 37 | // ---------------------------------- |
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| 38 | // random number generation |
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| 39 | |
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| 40 | static int randomSeeded = 0; |
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| 41 | |
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| 42 | int GB_random(int range) { |
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| 43 | // produces a random number in range [0 .. range-1] |
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| 44 | if (!randomSeeded) { |
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| 45 | srand(time(0)); |
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| 46 | randomSeeded = 1; |
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| 47 | } |
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| 48 | |
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| 49 | #if defined(DEBUG) |
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| 50 | if (range>RAND_MAX) { |
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| 51 | printf("Warning: range to big for random granularity (%i > %i)\n", range, RAND_MAX); |
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| 52 | } |
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| 53 | #endif // DEBUG |
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| 54 | |
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| 55 | return (int)(rand()*((double)range) / (RAND_MAX+1.0)); |
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| 56 | } |
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