LRANCW_R 3CW "05 January 2007" "mathcw-1.00"

Table of contents


NAME

lrancw_r - return uniformly-distributed pseudorandom 32-bit unsigned integer with external state

SYNOPSIS

cc [ flags ] -I/usr/local/include file(s) -L/usr/local/lib -lmcw [ ... ]

#include <mathcw.h>

extern UINT_LEAST32_T lrancw_r (randcw_state_t state);


DESCRIPTION

Compute a uniformly-distributed pseudorandom 32-bit unsigned integer. The generator state is keep externally in the state argument, a vector of four UINT_LEAST32_T values, most conveniently initialized with incw_r(). This makes the functions thread safe, and allows creation of a practically-unlimited number of independent families of generators, each with its own state. The generator is Marsaglia's KISS generator, which has a long period of about 2**123 (approximately 10**37), and has passed several difficult tests of randomness, including Marsaglia's Diehard Battery test suite, and the Marsaglia/Tsang tuftest suite. The generated values span the range [0, 2**32 - 1], even on machines with wordsizes larger than 32 bits.

RETURN VALUES

Return the pseudorandom integer.

ERRORS

None.

SEE ALSO

ercw(3CW), ercw_r(3CW), gscw(3CW), incw_r(3CW), llrancw(3CW), llrancw_r(3CW), llrincw(3CW), llrincw_r(3CW), lrancw(3CW), lrcw(3CW), lrcw_r(3CW), lrincw(3CW), lrincw_r(3CW), mscw(3CW), nrcw(3CW), nrcw_r(3CW), sccw(3CW), sscw(3CW), urcw(3CW), urcw1(3CW), urcw1_r(3CW), urcw2(3CW), urcw2_r(3CW), urcw3(3CW), urcw3_r(3CW), urcw4(3CW), urcw4_r(3CW), urcw_r(3CW), vercw(3CW), vercw_r(3CW), vllrancw(3CW), vllrancw_r(3CW), vllrincw(3CW), vllrincw_r(3CW), vlrancw(3CW), vlrancw_r(3CW), vlrcw(3CW), vlrcw_r(3CW), vlrincw(3CW), vlrincw_r(3CW), vnrcw(3CW), vnrcw_r(3CW), vurcw(3CW), vurcw1(3CW), vurcw1_r(3CW), vurcw2(3CW), vurcw2_r(3CW), vurcw3(3CW), vurcw3_r(3CW), vurcw4(3CW), vurcw4_r(3CW), vurcw_r(3CW).