blob: c04bc6f98c4601b8fd7619f500efe89c7705a7f6 [file] [log] [blame]
/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#include <njs_main.h>
njs_array_buffer_t *
njs_array_buffer_alloc(njs_vm_t *vm, uint64_t size)
{
njs_object_t *proto;
njs_array_buffer_t *array;
if (njs_slow_path(size > UINT32_MAX)) {
goto overflow;
}
array = njs_mp_alloc(vm->mem_pool, sizeof(njs_array_buffer_t));
if (njs_slow_path(array == NULL)) {
goto memory_error;
}
if (size > 0) {
array->u.data = njs_mp_zalloc(vm->mem_pool, size);
if (njs_slow_path(array->u.data == NULL)) {
goto memory_error;
}
}
proto = &vm->prototypes[NJS_OBJ_TYPE_ARRAY_BUFFER].object;
njs_lvlhsh_init(&array->object.hash);
njs_lvlhsh_init(&array->object.shared_hash);
array->object.__proto__ = proto;
array->object.type = NJS_ARRAY_BUFFER;
array->object.shared = 0;
array->object.extensible = 1;
array->size = size;
return array;
memory_error:
njs_memory_error(vm);
return NULL;
overflow:
njs_range_error(vm, "Invalid array length");
return NULL;
}
static njs_int_t
njs_array_buffer_constructor(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
njs_index_t unused)
{
uint64_t size;
njs_int_t ret;
njs_value_t *value;
njs_array_buffer_t *array;
if (!vm->top_frame->ctor) {
njs_type_error(vm, "Constructor ArrayBuffer requires 'new'");
return NJS_ERROR;
}
size = 0;
value = njs_arg(args, nargs, 1);
ret = njs_value_to_index(vm, value, &size);
if (njs_slow_path(ret != NJS_OK)) {
return NJS_ERROR;
}
array = njs_array_buffer_alloc(vm, size);
if (njs_slow_path(array == NULL)) {
return NJS_ERROR;
}
njs_set_array_buffer(&vm->retval, array);
return NJS_OK;
}
static njs_int_t
njs_array_buffer_get_this(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_index_t unused)
{
vm->retval = args[0];
return NJS_OK;
}
static njs_int_t
njs_array_buffer_is_view(njs_vm_t *vm, njs_value_t *args, njs_uint_t nargs,
njs_index_t unused)
{
njs_set_boolean(&vm->retval, njs_is_typed_array(njs_arg(args, nargs, 1)));
return NJS_OK;
}
static const njs_object_prop_t njs_array_buffer_constructor_properties[] =
{
/* ArrayBuffer.name == "ArrayBuffer". */
{
.type = NJS_PROPERTY,
.name = njs_string("name"),
.value = njs_string("ArrayBuffer"),
.configurable = 1,
},
/* ArrayBuffer.length == 1. */
{
.type = NJS_PROPERTY,
.name = njs_string("length"),
.value = njs_value(NJS_NUMBER, 1, 1.0),
.configurable = 1,
},
/* ArrayBuffer.prototype. */
{
.type = NJS_PROPERTY_HANDLER,
.name = njs_string("prototype"),
.value = njs_prop_handler(njs_object_prototype_create),
},
/* ArrayBuffer[Symbol.species] */
{
.type = NJS_PROPERTY,
.name = njs_wellknown_symbol(NJS_SYMBOL_SPECIES),
.value = njs_value(NJS_INVALID, 1, NAN),
.getter = njs_native_function(njs_array_buffer_get_this, 0),
.setter = njs_value(NJS_UNDEFINED, 0, NAN),
.writable = NJS_ATTRIBUTE_UNSET,
.configurable = 1,
.enumerable = 0,
},
/* ArrayBuffer.isView(new Uint8Array()) === true */
{
.type = NJS_PROPERTY,
.name = njs_string("isView"),
.value = njs_native_function(njs_array_buffer_is_view, 1),
.writable = 1,
.configurable = 1,
},
};
const njs_object_init_t njs_array_buffer_constructor_init = {
njs_array_buffer_constructor_properties,
njs_nitems(njs_array_buffer_constructor_properties),
};
static njs_int_t
njs_array_buffer_prototype_byte_length(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_index_t unused)
{
njs_value_t *value;
njs_array_buffer_t *array;
value = njs_arg(args, nargs, 0);
if (!njs_is_array_buffer(value)) {
njs_type_error(vm, "Method ArrayBuffer.prototype.byteLength called "
"on incompatible receiver");
return NJS_ERROR;
}
array = njs_array_buffer(value);
njs_set_number(&vm->retval, array->size);
return NJS_OK;
}
static njs_int_t
njs_array_buffer_prototype_slice(njs_vm_t *vm, njs_value_t *args,
njs_uint_t nargs, njs_index_t unused)
{
int64_t len, start, end;
njs_int_t ret;
njs_value_t *value;
njs_array_buffer_t *this, *buffer;
value = njs_arg(args, nargs, 0);
if (!njs_is_array_buffer(value)) {
njs_type_error(vm, "Method ArrayBuffer.prototype.slice called "
"on incompatible receiver");
return NJS_ERROR;
}
this = njs_array_buffer(value);
len = njs_array_buffer_size(this);
end = len;
value = njs_arg(args, nargs, 1);
ret = njs_value_to_integer(vm, value, &start);
if (njs_slow_path(ret != NJS_OK)) {
return ret;
}
value = njs_arg(args, nargs, 2);
if (!njs_is_undefined(value)) {
ret = njs_value_to_integer(vm, value, &end);
if (njs_slow_path(ret != NJS_OK)) {
return ret;
}
}
buffer = njs_array_buffer_slice(vm, this, start, end);
if (njs_slow_path(buffer == NULL)) {
return NJS_ERROR;
}
njs_set_array_buffer(&vm->retval, buffer);
return NJS_OK;
}
static const njs_object_prop_t njs_array_buffer_prototype_properties[] =
{
{
.type = NJS_PROPERTY_HANDLER,
.name = njs_string("constructor"),
.value = njs_prop_handler(njs_object_prototype_create_constructor),
.writable = 1,
.configurable = 1,
},
{
.type = NJS_PROPERTY,
.name = njs_string("byteLength"),
.value = njs_value(NJS_INVALID, 1, NAN),
.getter = njs_native_function(njs_array_buffer_prototype_byte_length,
0),
.setter = njs_value(NJS_UNDEFINED, 0, NAN),
.writable = NJS_ATTRIBUTE_UNSET,
.configurable = 1,
.enumerable = 0,
},
{
.type = NJS_PROPERTY,
.name = njs_string("slice"),
.value = njs_native_function(njs_array_buffer_prototype_slice, 2),
.writable = 1,
.configurable = 1,
.enumerable = 0,
},
{
.type = NJS_PROPERTY,
.name = njs_wellknown_symbol(NJS_SYMBOL_TO_STRING_TAG),
.value = njs_string("ArrayBuffer"),
.configurable = 1,
},
};
const njs_object_init_t njs_array_buffer_prototype_init = {
njs_array_buffer_prototype_properties,
njs_nitems(njs_array_buffer_prototype_properties),
};
const njs_object_type_init_t njs_array_buffer_type_init = {
.constructor = njs_native_ctor(njs_array_buffer_constructor, 1, 0),
.prototype_props = &njs_array_buffer_prototype_init,
.constructor_props = &njs_array_buffer_constructor_init,
.prototype_value = { .object = { .type = NJS_OBJECT } },
};