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88 lines
2.7 KiB
Python
88 lines
2.7 KiB
Python
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# this is based on jsarray.py
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from ..base import *
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try:
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import numpy
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except:
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pass
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@Js
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def Int16Array():
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TypedArray = (PyJsInt8Array, PyJsUint8Array, PyJsUint8ClampedArray,
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PyJsInt16Array, PyJsUint16Array, PyJsInt32Array,
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PyJsUint32Array, PyJsFloat32Array, PyJsFloat64Array)
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a = arguments[0]
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if isinstance(a, PyJsNumber): # length
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length = a.to_uint32()
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if length != a.value:
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raise MakeError('RangeError', 'Invalid array length')
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temp = Js(numpy.full(length, 0, dtype=numpy.int16))
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temp.put('length', a)
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return temp
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elif isinstance(a, PyJsString): # object (string)
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temp = Js(numpy.array(list(a.value), dtype=numpy.int16))
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temp.put('length', Js(len(list(a.value))))
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return temp
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elif isinstance(a, PyJsArray) or isinstance(a, TypedArray) or isinstance(
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a, PyJsArrayBuffer): # object (Array, TypedArray)
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array = a.to_list()
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array = [(int(item.value) if item.value != None else 0)
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for item in array]
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temp = Js(numpy.array(array, dtype=numpy.int16))
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temp.put('length', Js(len(array)))
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return temp
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elif isinstance(a, PyObjectWrapper): # object (ArrayBuffer, etc)
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if len(a.obj) % 2 != 0:
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raise MakeError(
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'RangeError',
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'Byte length of Int16Array should be a multiple of 2')
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if len(arguments) > 1:
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offset = int(arguments[1].value)
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if offset % 2 != 0:
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raise MakeError(
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'RangeError',
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'Start offset of Int16Array should be a multiple of 2')
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else:
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offset = 0
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if len(arguments) > 2:
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length = int(arguments[2].value)
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else:
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length = int((len(a.obj) - offset) / 2)
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array = numpy.frombuffer(
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a.obj, dtype=numpy.int16, count=length, offset=offset)
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temp = Js(array)
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temp.put('length', Js(length))
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temp.buff = array
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return temp
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temp = Js(numpy.full(0, 0, dtype=numpy.int16))
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temp.put('length', Js(0))
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return temp
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Int16Array.create = Int16Array
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Int16Array.own['length']['value'] = Js(3)
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Int16Array.define_own_property(
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'prototype', {
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'value': Int16ArrayPrototype,
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'enumerable': False,
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'writable': False,
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'configurable': False
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})
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Int16ArrayPrototype.define_own_property(
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'constructor', {
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'value': Int16Array,
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'enumerable': False,
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'writable': True,
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'configurable': True
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})
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Int16ArrayPrototype.define_own_property('BYTES_PER_ELEMENT', {
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'value': Js(2),
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'enumerable': False,
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'writable': False,
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'configurable': False
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})
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