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"rand()", in SunOS, may return values bigger than "RAND_MAX"...

This commit is contained in:
Roberto Ierusalimschy 1997-12-26 16:36:31 -02:00
parent d916487d7c
commit fada8efd01
1 changed files with 4 additions and 2 deletions
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6
lmathlib.c
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@ -1,5 +1,5 @@
/*
** $Id: lmathlib.c,v 1.6 1997/11/28 12:39:22 roberto Exp roberto $
** $Id: lmathlib.c,v 1.7 1997/12/09 13:35:19 roberto Exp roberto $
** Lua standard mathematical library
** See Copyright Notice in lua.h
*/
@ -145,8 +145,10 @@ static void math_max (void)
static void math_random (void)
{
/* the '%' is needed because on some sistems (SunOS!) "rand()" may */
/* return a value bigger than RAND_MAX... */
double r = (double)(rand()%RAND_MAX) / (double)RAND_MAX;
double l = luaL_opt_number(1, 0);
double r = (double)rand() / (double)RAND_MAX;
if (l == 0)
lua_pushnumber(r);
else