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@horus
Last active August 29, 2015 14:05
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Index: awk.1
===================================================================
--- awk.1 (revision 270781)
+++ awk.1 (working copy)
@@ -208,7 +208,7 @@
if no argument.
.TP
.B rand
-random number on (0,1)
+random number on [0,1)
.TP
.B srand
sets seed for
Index: main.c
===================================================================
--- main.c (revision 270781)
+++ main.c (working copy)
@@ -74,7 +74,7 @@
signal(SIGFPE, fpecatch);
srand_seed = 1;
- srand(srand_seed);
+ srandom((unsigned long) srand_seed);
yyin = NULL;
symtab = makesymtab(NSYMTAB/NSYMTAB);
Index: run.c
===================================================================
--- run.c (revision 270781)
+++ run.c (working copy)
@@ -1521,8 +1521,10 @@
u = (Awkfloat) system(getsval(x)) / 256; /* 256 is unix-dep */
break;
case FRAND:
- /* in principle, rand() returns something in 0..RAND_MAX */
- u = (Awkfloat) (rand() % RAND_MAX) / RAND_MAX;
+ /* random() returns numbers in [0..2^31-1]
+ * in order to get a number in [0, 1), divide it by 2^31
+ */
+ u = (Awkfloat) random() / (0x7fffffffL + 0x1UL);
break;
case FSRAND:
if (isrec(x)) /* no argument provided */
@@ -1530,7 +1532,7 @@
else
u = getfval(x);
tmp = u;
- srand((unsigned int) u);
+ srandom((unsigned long) u);
u = srand_seed;
srand_seed = tmp;
break;
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