| Current Path : /usr/local/include/postgresql/server/optimizer/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/local/include/postgresql/server/optimizer/geqo_random.h |
/*------------------------------------------------------------------------- * * geqo_random.h * random number generator * * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * $PostgreSQL: pgsql/src/include/optimizer/geqo_random.h,v 1.20 2008/01/01 19:45:58 momjian Exp $ * *------------------------------------------------------------------------- */ /* contributed by: =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= * Martin Utesch * Institute of Automatic Control * = = University of Mining and Technology = * utesch@aut.tu-freiberg.de * Freiberg, Germany * =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= */ /* -- parts of this are adapted from D. Whitley's Genitor algorithm -- */ #ifndef GEQO_RANDOM_H #define GEQO_RANDOM_H #include <math.h> /* geqo_rand returns a random float value between 0 and 1 inclusive */ #define geqo_rand() ((double) random() / (double) MAX_RANDOM_VALUE) /* geqo_randint returns integer value between lower and upper inclusive */ #define geqo_randint(upper,lower) \ ( (int) floor( geqo_rand()*(((upper)-(lower))+0.999999) ) + (lower) ) #endif /* GEQO_RANDOM_H */