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added String.prototype.at, Array.prototype.at and TypedArray.prototype.at

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This commit is contained in:
Fabrice Bellard
2023-12-05 16:54:43 +01:00
parent 3106401991
commit f87cab0fc6
2 changed files with 75 additions and 6 deletions
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75
quickjs.c
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@@ -37972,6 +37972,41 @@ static int JS_isConcatSpreadable(JSContext *ctx, JSValueConst obj)
return JS_IsArray(ctx, obj);
}
static JSValue js_array_at(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JSValue obj, ret;
int64_t len, idx;
JSValue *arrp;
uint32_t count;
obj = JS_ToObject(ctx, this_val);
if (js_get_length64(ctx, &len, obj))
goto exception;
if (JS_ToInt64Sat(ctx, &idx, argv[0]))
goto exception;
if (idx < 0)
idx = len + idx;
if (idx < 0 || idx >= len) {
ret = JS_UNDEFINED;
} else if (js_get_fast_array(ctx, obj, &arrp, &count) && idx < count) {
ret = JS_DupValue(ctx, arrp[idx]);
} else {
int present = JS_TryGetPropertyInt64(ctx, obj, idx, &ret);
if (present < 0)
goto exception;
if (!present)
ret = JS_UNDEFINED;
}
JS_FreeValue(ctx, obj);
return ret;
exception:
JS_FreeValue(ctx, obj);
return JS_EXCEPTION;
}
static JSValue js_array_concat(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
@@ -39333,6 +39368,7 @@ static const JSCFunctionListEntry js_iterator_proto_funcs[] = {
};
static const JSCFunctionListEntry js_array_proto_funcs[] = {
JS_CFUNC_DEF("at", 1, js_array_at ),
JS_CFUNC_DEF("concat", 1, js_array_concat ),
JS_CFUNC_MAGIC_DEF("every", 1, js_array_every, special_every ),
JS_CFUNC_MAGIC_DEF("some", 1, js_array_every, special_some ),
@@ -40032,7 +40068,7 @@ static JSValue js_string_charCodeAt(JSContext *ctx, JSValueConst this_val,
}
static JSValue js_string_charAt(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
int argc, JSValueConst *argv, int is_at)
{
JSValue val, ret;
JSString *p;
@@ -40046,8 +40082,13 @@ static JSValue js_string_charAt(JSContext *ctx, JSValueConst this_val,
JS_FreeValue(ctx, val);
return JS_EXCEPTION;
}
if (idx < 0 && is_at)
idx += p->len;
if (idx < 0 || idx >= p->len) {
ret = js_new_string8(ctx, NULL, 0);
if (is_at)
ret = JS_UNDEFINED;
else
ret = js_new_string8(ctx, NULL, 0);
} else {
if (p->is_wide_char)
c = p->u.str16[idx];
@@ -41306,8 +41347,9 @@ static const JSCFunctionListEntry js_string_funcs[] = {
static const JSCFunctionListEntry js_string_proto_funcs[] = {
JS_PROP_INT32_DEF("length", 0, JS_PROP_CONFIGURABLE ),
JS_CFUNC_MAGIC_DEF("at", 1, js_string_charAt, 1 ),
JS_CFUNC_DEF("charCodeAt", 1, js_string_charCodeAt ),
JS_CFUNC_DEF("charAt", 1, js_string_charAt ),
JS_CFUNC_MAGIC_DEF("charAt", 1, js_string_charAt, 0 ),
JS_CFUNC_DEF("concat", 1, js_string_concat ),
JS_CFUNC_DEF("codePointAt", 1, js_string_codePointAt ),
JS_CFUNC_MAGIC_DEF("indexOf", 1, js_string_indexOf, 0 ),
@@ -51343,6 +51385,32 @@ fail:
return JS_EXCEPTION;
}
static JSValue js_typed_array_at(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JSObject *p;
int64_t idx, len;
p = get_typed_array(ctx, this_val, 0);
if (!p)
return JS_EXCEPTION;
if (typed_array_is_detached(ctx, p)) {
JS_ThrowTypeErrorDetachedArrayBuffer(ctx);
return JS_EXCEPTION;
}
if (JS_ToInt64Sat(ctx, &idx, argv[0]))
return JS_EXCEPTION;
len = p->u.array.count;
if (idx < 0)
idx = len + idx;
if (idx < 0 || idx >= len)
return JS_UNDEFINED;
return JS_GetPropertyUint32(ctx, this_val, idx);
}
static JSValue js_typed_array_set(JSContext *ctx,
JSValueConst this_val,
int argc, JSValueConst *argv)
@@ -52517,6 +52585,7 @@ static const JSCFunctionListEntry js_typed_array_base_funcs[] = {
static const JSCFunctionListEntry js_typed_array_base_proto_funcs[] = {
JS_CGETSET_DEF("length", js_typed_array_get_length, NULL ),
JS_CFUNC_DEF("at", 1, js_typed_array_at ),
JS_CGETSET_MAGIC_DEF("buffer", js_typed_array_get_buffer, NULL, 0 ),
JS_CGETSET_MAGIC_DEF("byteLength", js_typed_array_get_byteLength, NULL, 0 ),
JS_CGETSET_MAGIC_DEF("byteOffset", js_typed_array_get_byteOffset, NULL, 0 ),