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Fix Array.prototype.slice when deleteCount is missing.

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Use behavior from newer JS specifications.
This commit is contained in:
Tor Andersson
2022-11-07 16:25:09 +01:00
parent c067e1299c
commit 66d98a5f8e
1 changed files with 16 additions and 9 deletions
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jsarray.c
+16 -9
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@@ -334,18 +334,25 @@ static void Ap_splice(js_State *J)
{
int top = js_gettop(J);
int len, start, del, add, k;
double f;
js_newarray(J);
len = js_getlength(J, 0);
start = js_tointeger(J, 1);
if (start < 0)
start = (len + start) > 0 ? len + start : 0;
else if (start > len)
start = len;
f = js_tointeger(J, 1);
if (f < 0) f = f + len;
start = f < 0 ? 0 : f > len ? len : f;
if (js_isdefined(J, 2))
del = js_tointeger(J, 2);
else
del = len - start;
if (del > len - start)
del = len - start;
if (del < 0)
del = 0;
f = js_tointeger(J, 2);
del = f < 0 ? 0 : f > len - start ? len - start : f;
js_newarray(J);
/* copy deleted items to return array */
for (k = 0; k < del; ++k)
@@ -724,7 +731,7 @@ void jsB_initarray(js_State *J)
jsB_propf(J, "Array.prototype.shift", Ap_shift, 0);
jsB_propf(J, "Array.prototype.slice", Ap_slice, 2);
jsB_propf(J, "Array.prototype.sort", Ap_sort, 1);
jsB_propf(J, "Array.prototype.splice", Ap_splice, 0); /* 2 */
jsB_propf(J, "Array.prototype.splice", Ap_splice, 2);
jsB_propf(J, "Array.prototype.unshift", Ap_unshift, 0); /* 1 */
/* ES5 */