rw_rand.h

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#ifndef RW_RAND_H_INCLUDED
#define RW_RAND_H_INCLUDED
 
#include <rw/_defs.h>   // for libstd config macros
 
#include <rw_testdefs.h>   // for test config macros
 
// seeds the 32-bit random number generator
// if the seed is equal UINT32_MAX picks a random value to seed
// the generator with
_TEST_EXPORT void
rw_seed32 (_RWSTD_UINT32_T);
 
// returns a 32-bit random number in the range [0, limit)
// if limit is non-zero, otherwise in the range [0, UINT32_MAX)
_TEST_EXPORT _RWSTD_UINT32_T
rw_rand32 (_RWSTD_UINT32_T = 0);
 
#ifdef _RWSTD_UINT64_T
 
// seeds the 64-bit random number generator
// if the seed is equal UINT64_MAX picks a random value to seed
// the generator with
_TEST_EXPORT void
rw_seed64 (_RWSTD_UINT64_T);
 
// returns a 64-bit random number in the range [0, limit)
// if limit is non-zero, otherwise in the range [0, UINT64_MAX)
_TEST_EXPORT _RWSTD_UINT64_T
rw_rand64 (_RWSTD_UINT64_T = 0);
 
#  if 32 == _RWSTD_INT_SIZE
#    define rw_seed(limit)   rw_seed32 (limit)
#    define rw_rand(limit)   rw_rand32 (limit)
#  else   // if 32 != _RWSTD_INT_SIZE
#    define rw_seed(limit)   rw_seed64 (limit)
#    define rw_rand(limit)   rw_rand64 (limit)
#  endif   // 32 == _RWSTD_INT_SIZE
#else   // if !defined (_RWSTD_UINT64_T)
#  define rw_seed(limit)   rw_seed32 (limit)
#  define rw_rand(limit)   rw_rand32 (limit)
#endif   // _RWSTD_UINT64_T
 
#endif   // RW_RAND_H_INCLUDED