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detail (ensure subtraction is done unsigned)

This commit is contained in:
Roberto Ierusalimschy 2015-10-02 12:39:23 -03:00
parent 10fffcd80a
commit dc4232379d

View File

@ -1,5 +1,5 @@
/* /*
** $Id: lmathlib.c,v 1.115 2015/03/12 14:04:04 roberto Exp roberto $ ** $Id: lmathlib.c,v 1.116 2015/06/26 19:30:32 roberto Exp $
** Standard mathematical library ** Standard mathematical library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -39,7 +39,7 @@
static int math_abs (lua_State *L) { static int math_abs (lua_State *L) {
if (lua_isinteger(L, 1)) { if (lua_isinteger(L, 1)) {
lua_Integer n = lua_tointeger(L, 1); lua_Integer n = lua_tointeger(L, 1);
if (n < 0) n = (lua_Integer)(0u - n); if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
lua_pushinteger(L, n); lua_pushinteger(L, n);
} }
else else