rusefi
/
lua
mirror of https://github.com/rusefi/lua.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

cleaner test for overflow for range of 'math.random'

This commit is contained in:
Roberto Ierusalimschy 2014-11-07 09:31:58 -02:00
parent 50b18f60cb
commit 17ca3b1763
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lmathlib.c
View File

@ -1,5 +1,5 @@
/* /*
** $Id: lmathlib.c,v 1.111 2014/10/24 11:42:06 roberto Exp roberto $ ** $Id: lmathlib.c,v 1.112 2014/11/02 19:19:04 roberto Exp roberto $
** Standard mathematical library ** Standard mathematical library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -258,8 +258,8 @@ static int math_random (lua_State *L) {
} }
/* random integer in the interval [low, up] */ /* random integer in the interval [low, up] */
luaL_argcheck(L, low <= up, 1, "interval is empty"); luaL_argcheck(L, low <= up, 1, "interval is empty");
luaL_argcheck(L, (lua_Unsigned)up - low <= (lua_Unsigned)LUA_MAXINTEGER, luaL_argcheck(L, low >= 0 || up <= LUA_MAXINTEGER + low, 1,
1, "interval too large"); "interval too large");
r *= (double)(up - low) + 1.0; r *= (double)(up - low) + 1.0;
lua_pushinteger(L, (lua_Integer)r + low); lua_pushinteger(L, (lua_Integer)r + low);
return 1; return 1;