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
|
File size:
1.6 KB
|
Line | |
---|
1 | // =============================================================== // |
---|
2 | // // |
---|
3 | // File : admath.cxx // |
---|
4 | // Purpose : // |
---|
5 | // // |
---|
6 | // Institute of Microbiology (Technical University Munich) // |
---|
7 | // http://www.arb-home.de/ // |
---|
8 | // // |
---|
9 | // =============================================================== // |
---|
10 | |
---|
11 | #include <cmath> |
---|
12 | #include <ctime> |
---|
13 | |
---|
14 | #include "gb_local.h" |
---|
15 | |
---|
16 | double GB_log_fak(int n) { |
---|
17 | // returns log(n!) |
---|
18 | static int max_n = 0; |
---|
19 | static double *res = 0; |
---|
20 | |
---|
21 | if (n<=1) return 0.0; // log 1 = 0 |
---|
22 | |
---|
23 | if (n >= max_n) { |
---|
24 | double sum = 0; |
---|
25 | int i; |
---|
26 | freenull(res); |
---|
27 | max_n = n + 100; |
---|
28 | res = (double *)GB_calloc(sizeof(double), max_n); |
---|
29 | for (i=1; i<max_n; i++) { |
---|
30 | sum += log((double)i); |
---|
31 | res[i] = sum; |
---|
32 | } |
---|
33 | } |
---|
34 | return res[n]; |
---|
35 | } |
---|
36 | |
---|
37 | // ---------------------------------- |
---|
38 | // random number generation |
---|
39 | |
---|
40 | static int randomSeeded = 0; |
---|
41 | |
---|
42 | int GB_random(int range) { |
---|
43 | // produces a random number in range [0 .. range-1] |
---|
44 | if (!randomSeeded) { |
---|
45 | srand(time(0)); |
---|
46 | randomSeeded = 1; |
---|
47 | } |
---|
48 | |
---|
49 | #if defined(DEBUG) |
---|
50 | if (range>RAND_MAX) { |
---|
51 | printf("Warning: range to big for random granularity (%i > %i)\n", range, RAND_MAX); |
---|
52 | } |
---|
53 | #endif // DEBUG |
---|
54 | |
---|
55 | return (int)(rand()*((double)range) / (RAND_MAX+1.0)); |
---|
56 | } |
---|
Note: See
TracBrowser
for help on using the repository browser.