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From Lua 5.2: Return nil for bad position in string.find().

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Needs -DLUAJIT_ENABLE_LUA52COMPAT.
This commit is contained in:
Mike Pall 2012-10-02 11:56:33 +02:00
parent b66ab96a62
commit 0d7094f36e
1 changed files with 8 additions and 2 deletions
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10
src/lib_string.c
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@ -487,10 +487,16 @@ static int str_find_aux(lua_State *L, int find)
const char *s = luaL_checklstring(L, 1, &l1);
const char *p = luaL_checklstring(L, 2, &l2);
ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
if (init < 0)
if (init < 0) {
init = 0;
else if ((size_t)(init) > l1)
} else if ((size_t)(init) > l1) {
#if LJ_52
setnilV(L->top-1);
return 1;
#else
init = (ptrdiff_t)l1;
#endif
}
if (find && (lua_toboolean(L, 4) || /* explicit request? */
strpbrk(p, SPECIALS) == NULL)) { /* or no special characters? */
/* do a plain search */