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Unified Diff: sdk/lib/_internal/compiler/js_lib/math_patch.dart

Issue 1212513002: sdk files reorganization to make dart2js a proper package (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: renamed Created 5 years, 6 months ago
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Index: sdk/lib/_internal/compiler/js_lib/math_patch.dart
diff --git a/sdk/lib/_internal/compiler/js_lib/math_patch.dart b/sdk/lib/_internal/compiler/js_lib/math_patch.dart
deleted file mode 100644
index 0a4370873ec4a974c22d11ee1cfb5082677e9c3e..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/compiler/js_lib/math_patch.dart
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// Patch file for dart:math library.
-import 'dart:_foreign_helper' show JS;
-import 'dart:_js_helper' show patch, checkNum;
-
-@patch
-double sqrt(num x)
- => JS('double', r'Math.sqrt(#)', checkNum(x));
-
-@patch
-double sin(num x)
- => JS('double', r'Math.sin(#)', checkNum(x));
-
-@patch
-double cos(num x)
- => JS('double', r'Math.cos(#)', checkNum(x));
-
-@patch
-double tan(num x)
- => JS('double', r'Math.tan(#)', checkNum(x));
-
-@patch
-double acos(num x)
- => JS('double', r'Math.acos(#)', checkNum(x));
-
-@patch
-double asin(num x)
- => JS('double', r'Math.asin(#)', checkNum(x));
-
-@patch
-double atan(num x)
- => JS('double', r'Math.atan(#)', checkNum(x));
-
-@patch
-double atan2(num a, num b)
- => JS('double', r'Math.atan2(#, #)', checkNum(a), checkNum(b));
-
-@patch
-double exp(num x)
- => JS('double', r'Math.exp(#)', checkNum(x));
-
-@patch
-double log(num x)
- => JS('double', r'Math.log(#)', checkNum(x));
-
-@patch
-num pow(num x, num exponent) {
- checkNum(x);
- checkNum(exponent);
- return JS('num', r'Math.pow(#, #)', x, exponent);
-}
-
-const int _POW2_32 = 0x100000000;
-
-@patch
-class Random {
- @patch
- factory Random([int seed]) =>
- (seed == null) ? const _JSRandom() : new _Random(seed);
-}
-
-class _JSRandom implements Random {
- // The Dart2JS implementation of Random doesn't use a seed.
- const _JSRandom();
-
- int nextInt(int max) {
- if (max <= 0 || max > _POW2_32) {
- throw new RangeError("max must be in range 0 < max ≤ 2^32, was $max");
- }
- return JS("int", "(Math.random() * #) >>> 0", max);
- }
-
- /**
- * Generates a positive random floating point value uniformly distributed on
- * the range from 0.0, inclusive, to 1.0, exclusive.
- */
- double nextDouble() => JS("double", "Math.random()");
-
- /**
- * Generates a random boolean value.
- */
- bool nextBool() => JS("bool", "Math.random() < 0.5");
-}
-
-
-class _Random implements Random {
- // Constants used by the algorithm or masking.
- static const double _POW2_53_D = 1.0 * (0x20000000000000);
- static const double _POW2_27_D = 1.0 * (1 << 27);
- static const int _MASK32 = 0xFFFFFFFF;
-
- // State comprised of two unsigned 32 bit integers.
- int _lo = 0;
- int _hi = 0;
-
- // Implements:
- // uint64_t hash = 0;
- // do {
- // hash = hash * 1037 ^ mix64((uint64_t)seed);
- // seed >>= 64;
- // } while (seed != 0 && seed != -1); // Limits for pos/neg seed.
- // if (hash == 0) {
- // hash = 0x5A17;
- // }
- // _lo = hash & _MASK_32;
- // _hi = hash >> 32;
- // and then does four _nextState calls to shuffle bits around.
- _Random(int seed) {
- int empty_seed = 0;
- if (seed < 0) {
- empty_seed = -1;
- }
- do {
- int low = seed & _MASK32;
- seed = (seed - low) ~/ _POW2_32;
- int high = seed & _MASK32;
- seed = (seed - high) ~/ _POW2_32;
-
- // Thomas Wang's 64-bit mix function.
- // http://www.concentric.net/~Ttwang/tech/inthash.htm
- // via. http://web.archive.org/web/20071223173210/http://www.concentric.net/~Ttwang/tech/inthash.htm
-
- // key = ~key + (key << 21);
- int tmplow = low << 21;
- int tmphigh = (high << 21) | (low >> 11);
- tmplow = (~low & _MASK32) + tmplow;
- low = tmplow & _MASK32;
- high = (~high + tmphigh + ((tmplow - low) ~/ 0x100000000)) & _MASK32;
- // key = key ^ (key >> 24).
- tmphigh = high >> 24;
- tmplow = (low >> 24) | (high << 8);
- low ^= tmplow;
- high ^= tmphigh;
- // key = key * 265
- tmplow = low * 265;
- low = tmplow & _MASK32;
- high = (high * 265 + (tmplow - low) ~/ 0x100000000) & _MASK32;
- // key = key ^ (key >> 14);
- tmphigh = high >> 14;
- tmplow = (low >> 14) | (high << 18);
- low ^= tmplow;
- high ^= tmphigh;
- // key = key * 21
- tmplow = low * 21;
- low = tmplow & _MASK32;
- high = (high * 21 + (tmplow - low) ~/ 0x100000000) & _MASK32;
- // key = key ^ (key >> 28).
- tmphigh = high >> 28;
- tmplow = (low >> 28) | (high << 4);
- low ^= tmplow;
- high ^= tmphigh;
- // key = key + (key << 31);
- tmplow = low << 31;
- tmphigh = (high << 31) | (low >> 1);
- tmplow += low;
- low = tmplow & _MASK32;
- high = (high + tmphigh + (tmplow - low) ~/ 0x100000000) & _MASK32;
- // Mix end.
-
- // seed = seed * 1037 ^ key;
- tmplow = _lo * 1037;
- _lo = tmplow & _MASK32;
- _hi = (_hi * 1037 + (tmplow - _lo) ~/ 0x100000000) & _MASK32;
- _lo ^= low;
- _hi ^= high;
- } while (seed != empty_seed);
-
- if (_hi == 0 && _lo == 0) {
- _lo = 0x5A17;
- }
- _nextState();
- _nextState();
- _nextState();
- _nextState();
- }
-
- // The algorithm used here is Multiply with Carry (MWC) with a Base b = 2^32.
- // http://en.wikipedia.org/wiki/Multiply-with-carry
- // The constant A (0xFFFFDA61) is selected from "Numerical Recipes 3rd
- // Edition" p.348 B1.
-
- // Implements:
- // var state = (A * _lo + _hi) & _MASK_64;
- // _lo = state & _MASK_32;
- // _hi = state >> 32;
- void _nextState() {
- // Simulate (0xFFFFDA61 * lo + hi) without overflowing 53 bits.
- int tmpHi = 0xFFFF0000 * _lo; // At most 48 bits of significant result.
- int tmpHiLo = tmpHi & _MASK32; // Get the lower 32 bits.
- int tmpHiHi = tmpHi - tmpHiLo; // And just the upper 32 bits.
- int tmpLo = 0xDA61 * _lo;
- int tmpLoLo = tmpLo & _MASK32;
- int tmpLoHi = tmpLo - tmpLoLo;
-
- int newLo = tmpLoLo + tmpHiLo + _hi;
- _lo = newLo & _MASK32;
- int newLoHi = newLo - _lo;
- _hi = ((tmpLoHi + tmpHiHi + newLoHi) ~/ _POW2_32) & _MASK32;
- assert(_lo < _POW2_32);
- assert(_hi < _POW2_32);
- }
-
- int nextInt(int max) {
- if (max <= 0 || max > _POW2_32) {
- throw new RangeError("max must be in range 0 < max ≤ 2^32, was $max");
- }
- if ((max & (max - 1)) == 0) {
- // Fast case for powers of two.
- _nextState();
- return _lo & (max - 1);
- }
-
- int rnd32;
- int result;
- do {
- _nextState();
- rnd32 = _lo;
- result = rnd32.remainder(max); // % max;
- } while ((rnd32 - result + max) >= _POW2_32);
- return result;
- }
-
- double nextDouble() {
- _nextState();
- int bits26 = _lo & ((1 << 26) - 1);
- _nextState();
- int bits27 = _lo & ((1 << 27) - 1);
- return (bits26 * _POW2_27_D + bits27) / _POW2_53_D;
- }
-
- bool nextBool() {
- _nextState();
- return (_lo & 1) == 0;
- }
-}

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