diff options
Diffstat (limited to 'pp.c')
| -rw-r--r-- | pp.c | 81 |
1 files changed, 0 insertions, 81 deletions
@@ -2727,87 +2727,6 @@ PP(pp_srand) RETPUSHYES; } -STATIC U32 -S_seed(pTHX) -{ - /* - * This is really just a quick hack which grabs various garbage - * values. It really should be a real hash algorithm which - * spreads the effect of every input bit onto every output bit, - * if someone who knows about such things would bother to write it. - * Might be a good idea to add that function to CORE as well. - * No numbers below come from careful analysis or anything here, - * except they are primes and SEED_C1 > 1E6 to get a full-width - * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should - * probably be bigger too. - */ -#if RANDBITS > 16 -# define SEED_C1 1000003 -#define SEED_C4 73819 -#else -# define SEED_C1 25747 -#define SEED_C4 20639 -#endif -#define SEED_C2 3 -#define SEED_C3 269 -#define SEED_C5 26107 - -#ifndef PERL_NO_DEV_RANDOM - int fd; -#endif - U32 u; -#ifdef VMS -# include <starlet.h> - /* when[] = (low 32 bits, high 32 bits) of time since epoch - * in 100-ns units, typically incremented ever 10 ms. */ - unsigned int when[2]; -#else -# ifdef HAS_GETTIMEOFDAY - struct timeval when; -# else - Time_t when; -# endif -#endif - -/* This test is an escape hatch, this symbol isn't set by Configure. */ -#ifndef PERL_NO_DEV_RANDOM -#ifndef PERL_RANDOM_DEVICE - /* /dev/random isn't used by default because reads from it will block - * if there isn't enough entropy available. You can compile with - * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there - * is enough real entropy to fill the seed. */ -# define PERL_RANDOM_DEVICE "/dev/urandom" -#endif - fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0); - if (fd != -1) { - if (PerlLIO_read(fd, &u, sizeof u) != sizeof u) - u = 0; - PerlLIO_close(fd); - if (u) - return u; - } -#endif - -#ifdef VMS - _ckvmssts(sys$gettim(when)); - u = (U32)SEED_C1 * when[0] + (U32)SEED_C2 * when[1]; -#else -# ifdef HAS_GETTIMEOFDAY - PerlProc_gettimeofday(&when,NULL); - u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec; -# else - (void)time(&when); - u = (U32)SEED_C1 * when; -# endif -#endif - u += SEED_C3 * (U32)PerlProc_getpid(); - u += SEED_C4 * (U32)PTR2UV(PL_stack_sp); -#ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */ - u += SEED_C5 * (U32)PTR2UV(&when); -#endif - return u; -} - PP(pp_exp) { dSP; dTARGET; tryAMAGICun(exp); |