[src/trunk]: src/external/mit/lua/dist/src lua(4): preventing division by zero

[lneto <lneto%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b612a28e40f4
branches:  trunk
changeset: 330726:b612a28e40f4
user:      lneto <lneto%NetBSD.org@localhost>
date:      Sat Jul 19 17:11:52 2014 +0000

description:
lua(4): preventing division by zero

* note: we should raise an error instead of return INTMAX_MAX

diffstat:

 external/mit/lua/dist/src/luaconf.h |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (31 lines):

diff -r 99c600685a6a -r b612a28e40f4 external/mit/lua/dist/src/luaconf.h
--- a/external/mit/lua/dist/src/luaconf.h       Sat Jul 19 17:10:02 2014 +0000
+++ b/external/mit/lua/dist/src/luaconf.h       Sat Jul 19 17:11:52 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: luaconf.h,v 1.7 2014/03/26 22:03:26 christos Exp $     */
+/*     $NetBSD: luaconf.h,v 1.8 2014/07/19 17:11:52 lneto Exp $        */
 
 /*
 ** Id: luaconf.h,v 1.82.1.7 2008/02/11 16:25:08 roberto Exp $
@@ -553,10 +553,13 @@
 */
 #if defined(LUA_CORE)
 #ifdef _KERNEL
+/* XXX: we should raise an error instead of return INTMAX_MAX */
+#define luai_numdiv(a,b)       ((b) != 0 ? (a)/(b) : INTMAX_MAX)
 #define luai_nummod(a,b)       ((a)%(b))
 #define luai_numpow(a,b)       luai_nummul(a,b)
 #else
 #include <math.h>
+#define luai_numdiv(a,b)       ((a)/(b))
 #define luai_nummod(a,b)       ((a) - floor((a)/(b))*(b))
 #define luai_numpow(a,b)       (pow(a,b))
 #endif
@@ -564,7 +567,6 @@
 #define luai_numadd(a,b)       ((a)+(b))
 #define luai_numsub(a,b)       ((a)-(b))
 #define luai_nummul(a,b)       ((a)*(b))
-#define luai_numdiv(a,b)       ((a)/(b))
 #define luai_numunm(a)         (-(a))
 #define luai_numeq(a,b)                ((a)==(b))
 #define luai_numlt(a,b)                ((a)<(b))