mirror of
https://github.com/nim-lang/Nim.git
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f05387045d
* int64/uint64 as bigint in JS * fix CI * convert to compile option * fix lie * smaller diff, changelog entry
97 lines
3.7 KiB
Nim
97 lines
3.7 KiB
Nim
when defined(js):
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import std/jsbigints
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type
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ArrayBuffer* = ref object of JsRoot
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Float64Array* = ref object of JsRoot
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Uint32Array* = ref object of JsRoot
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Uint8Array* = ref object of JsRoot
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BigUint64Array* = ref object of JsRoot
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func newArrayBuffer*(n: int): ArrayBuffer {.importjs: "new ArrayBuffer(#)".}
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func newFloat64Array*(buffer: ArrayBuffer): Float64Array {.importjs: "new Float64Array(#)".}
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func newUint32Array*(buffer: ArrayBuffer): Uint32Array {.importjs: "new Uint32Array(#)".}
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func newBigUint64Array*(buffer: ArrayBuffer): BigUint64Array {.importjs: "new BigUint64Array(#)".}
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func newUint8Array*(n: int): Uint8Array {.importjs: "new Uint8Array(#)".}
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func `[]`*(arr: Uint32Array, i: int): uint32 {.importjs: "#[#]".}
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func `[]`*(arr: Uint8Array, i: int): uint8 {.importjs: "#[#]".}
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func `[]`*(arr: BigUint64Array, i: int): JsBigInt {.importjs: "#[#]".}
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func `[]=`*(arr: Float64Array, i: int, v: float) {.importjs: "#[#] = #".}
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proc jsTypeOf*[T](x: T): cstring {.importjs: "typeof(#)".} =
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## Returns the name of the JsObject's JavaScript type as a cstring.
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# xxx replace jsffi.jsTypeOf with this definition and add tests
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runnableExamples:
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import std/[jsffi, jsbigints]
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assert jsTypeOf(1.toJs) == "number"
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assert jsTypeOf(false.toJs) == "boolean"
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assert [1].toJs.jsTypeOf == "object" # note the difference with `getProtoName`
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assert big"1".toJs.jsTypeOf == "bigint"
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proc jsConstructorName*[T](a: T): cstring =
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runnableExamples:
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import std/jsffi
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let a = array[2, float64].default
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assert jsConstructorName(a) == "Float64Array"
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assert jsConstructorName(a.toJs) == "Float64Array"
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asm """`result` = `a`.constructor.name"""
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proc hasJsBigInt*(): bool =
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asm """`result` = typeof BigInt != 'undefined'"""
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proc hasBigUint64Array*(): bool =
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asm """`result` = typeof BigUint64Array != 'undefined'"""
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proc getProtoName*[T](a: T): cstring {.importjs: "Object.prototype.toString.call(#)".} =
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runnableExamples:
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import std/[jsffi, jsbigints]
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type A = ref object
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assert 1.toJs.getProtoName == "[object Number]"
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assert "a".toJs.getProtoName == "[object String]"
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assert big"1".toJs.getProtoName == "[object BigInt]"
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assert false.toJs.getProtoName == "[object Boolean]"
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assert (a: 1).toJs.getProtoName == "[object Object]"
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assert A.default.toJs.getProtoName == "[object Null]"
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assert [1].toJs.getProtoName == "[object Int32Array]" # implementation defined
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assert @[1].toJs.getProtoName == "[object Array]" # ditto
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const maxSafeInteger* = 9007199254740991
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## The same as `Number.MAX_SAFE_INTEGER` or `2^53 - 1`.
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## See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER
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runnableExamples:
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let a {.importjs: "Number.MAX_SAFE_INTEGER".}: int64
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assert a == maxSafeInteger
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proc isInteger*[T](x: T): bool {.importjs: "Number.isInteger(#)".} =
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runnableExamples:
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import std/jsffi
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assert 1.isInteger
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assert not 1.5.isInteger
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assert 1.toJs.isInteger
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assert not 1.5.toJs.isInteger
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proc isSafeInteger*[T](x: T): bool {.importjs: "Number.isSafeInteger(#)".} =
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runnableExamples:
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import std/jsffi
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assert not "123".toJs.isSafeInteger
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assert 123.isSafeInteger
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assert 123.toJs.isSafeInteger
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when false:
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assert 9007199254740991.toJs.isSafeInteger
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assert not 9007199254740992.toJs.isSafeInteger
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template whenJsNoBigInt64*(no64, yes64): untyped =
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when defined(js):
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when compiles(compileOption("jsbigint64")):
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when compileOption("jsbigint64"):
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yes64
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else:
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no64
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else:
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no64
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else:
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no64
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