drygdryg/calc
1
0
Fork 0
mirror of https://github.com/lcn2/calc.git synced 2025-08-19 01:13:27 +03:00
Code Issues Packages Projects Releases Wiki Activity

Improve seed() builtin

Browse Source
This commit is contained in:
Landon Curt Noll
2021-12-07 13:39:07 -08:00
parent 2023175fcc
commit 48c4f3b948
1 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
seed.c
View File

@@ -80,8 +80,8 @@
#endif #endif
#if defined(HAVE_STDLIB_H) #if defined(HAVE_STDLIB_H)
# include <stdlib.h> # include <stdlib.h>
# define RANDOM_CNT (64) /* double random() call repeat count */ # define RANDOM_CNT (8) /* double random() call repeat count */
# define INITSTATE_SIZE (256) /* initstate pool size */ # define INITSTATE_SIZE (16) /* initstate pool size */
#endif #endif
#include <setjmp.h> #include <setjmp.h>
#include "alloc.h" #include "alloc.h"
@@ -469,6 +469,7 @@ pseudo_seed(void)
char *initstate_ret; /* return from initstate() call */ char *initstate_ret; /* return from initstate() call */
char initstate_tbl[INITSTATE_SIZE]; /* initstate pool */ char initstate_tbl[INITSTATE_SIZE]; /* initstate pool */
long random_after[RANDOM_CNT]; /* random() post initstate() */ long random_after[RANDOM_CNT]; /* random() post initstate() */
char *setstate_ret; /* return from setstate() call */
int j; int j;
#endif /* HAVE_STDLIB_H */ #endif /* HAVE_STDLIB_H */
#if defined(HAVE_ENVIRON) #if defined(HAVE_ENVIRON)
@@ -663,6 +664,9 @@ pseudo_seed(void)
random_after[j+1] = (random() << 1); random_after[j+1] = (random() << 1);
} }
/* restore previous state */
setstate_ret = setstate(initstate_ret);
/* /*
* hash all the data from random() and friends * hash all the data from random() and friends
*/ */
@@ -681,6 +685,9 @@ pseudo_seed(void)
hash_val = private_hash64_buf(hash_val, hash_val = private_hash64_buf(hash_val,
(char *)random_after, (char *)random_after,
sizeof(random_after)); sizeof(random_after));
hash_val = private_hash64_buf(hash_val,
(char *)setstate_ret,
sizeof(setstate_ret));
#endif /* HAVE_STDLIB_H */ #endif /* HAVE_STDLIB_H */
#if defined(HAVE_ARC4RANDOM) #if defined(HAVE_ARC4RANDOM)