diogo/yap-6.3
Archived
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

more random

Browse Source
This commit is contained in:
Vítor Santos Costa 2014-05-28 01:12:51 +01:00
parent 1e08a7ce05
commit 3c0f910906
1 changed files with 45 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
C/sysbits.c
View File

@ -1110,6 +1110,47 @@ Yap_random (void)
#endif
}
#if HAVE_RANDOM
static Int
p_init_random_state ( USES_REGS1 )
{
register Term t0 = Deref (ARG1);
char *old, * new = (char *) malloc(256);
if (IsVarTerm (t0)) {
return(Yap_unify(ARG1,MkIntegerTerm((Int)current_seed)));
}
if(!IsNumTerm (t0))
return (FALSE);
if (IsIntTerm (t0))
current_seed = (unsigned int) IntOfTerm (t0);
else if (IsFloatTerm (t0))
current_seed = (unsigned int) FloatOfTerm (t0);
else
current_seed = (unsigned int) LongIntOfTerm (t0);
old = initstate(random(), new, 256);
return Yap_unify(ARG2, MkIntegerTerm((Int)old)) &&
Yap_unify(ARG3, MkIntegerTerm((Int)new));
}
static Int
p_set_random_state ( USES_REGS1 )
{
register Term t0 = Deref (ARG1);
char *old, * new = (char *) malloc(256);
if (IsVarTerm (t0)) {
return FALSE;
}
if (IsIntegerTerm (t0))
new = (char *) IntegerOfTerm (t0);
else
return FALSE;
old = initstate(random(), new, 256);
return Yap_unify(ARG2, MkIntegerTerm((Int)old));
}
#endif
static Int
p_srandom ( USES_REGS1 )
{
@ -3010,6 +3051,10 @@ Yap_InitSysPreds(void)
/* can only do after heap is initialised */
InitLastWtime();
Yap_InitCPred ("srandom", 1, p_srandom, SafePredFlag);
#if HAVE_RANDOM
Yap_InitCPred ("init_random_state", 3, p_init_random_state, SafePredFlag);
Yap_InitCPred ("set_random_state", 1, p_set_random_state, SafePredFlag);
#endif
Yap_InitCPred ("sh", 0, p_sh, SafePredFlag|SyncPredFlag);
Yap_InitCPred ("$shell", 1, p_shell, SafePredFlag|SyncPredFlag|UserCPredFlag);
Yap_InitCPred ("system", 1, p_system, SafePredFlag|SyncPredFlag|UserCPredFlag);