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https://github.com/zebrajr/node.git
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3a2f273bd7
Memory allocations are now done through smalloc. The Buffer cc class has been removed completely, but for backwards compatibility have left the namespace as Buffer. The .parent attribute is only set if the Buffer is a slice of an allocation. Which is then set to the alloc object (not a Buffer). The .offset attribute is now a ReadOnly set to 0, for backwards compatibility. I'd like to remove it in the future (pre v1.0). A few alterations have been made to how arguments are either coerced or thrown. All primitives will now be coerced to their respective values, and (most) all out of range index requests will throw. The indexes that are coerced were left for backwards compatibility. For example: Buffer slice operates more like Array slice, and coerces instead of throwing out of range indexes. This may change in the future. The reason for wanting to throw for out of range indexes is because giving js access to raw memory has high potential risk. To mitigate that it's easier to make sure the developer is always quickly alerted to the fact that their code is attempting to access beyond memory bounds. Because SlowBuffer will be deprecated, and simply returns a new Buffer instance, all tests on SlowBuffer have been removed. Heapdumps will now show usage under "smalloc" instead of "Buffer". ParseArrayIndex was added to node_internals to support proper uint argument checking/coercion for external array data indexes. SlabAllocator had to be updated since handle_ no longer exists.
130 lines
3.8 KiB
JavaScript
130 lines
3.8 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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/*
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* Tests to verify we're reading in doubles correctly
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*/
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var common = require('../common');
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var ASSERT = require('assert');
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/*
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* Test (64 bit) double
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*/
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function test(clazz) {
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var buffer = new clazz(8);
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buffer[0] = 0x55;
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buffer[1] = 0x55;
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buffer[2] = 0x55;
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buffer[3] = 0x55;
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buffer[4] = 0x55;
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buffer[5] = 0x55;
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buffer[6] = 0xd5;
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buffer[7] = 0x3f;
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ASSERT.equal(1.1945305291680097e+103, buffer.readDoubleBE(0));
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ASSERT.equal(0.3333333333333333, buffer.readDoubleLE(0));
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buffer[0] = 1;
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0;
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buffer[4] = 0;
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buffer[5] = 0;
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buffer[6] = 0xf0;
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buffer[7] = 0x3f;
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ASSERT.equal(7.291122019655968e-304, buffer.readDoubleBE(0));
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ASSERT.equal(1.0000000000000002, buffer.readDoubleLE(0));
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buffer[0] = 2;
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ASSERT.equal(4.778309726801735e-299, buffer.readDoubleBE(0));
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ASSERT.equal(1.0000000000000004, buffer.readDoubleLE(0));
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buffer[0] = 1;
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buffer[6] = 0;
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buffer[7] = 0;
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ASSERT.equal(7.291122019556398e-304, buffer.readDoubleBE(0));
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ASSERT.equal(5e-324, buffer.readDoubleLE(0));
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buffer[0] = 0xff;
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buffer[1] = 0xff;
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buffer[2] = 0xff;
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buffer[3] = 0xff;
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buffer[4] = 0xff;
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buffer[5] = 0xff;
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buffer[6] = 0x0f;
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buffer[7] = 0x00;
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ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
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ASSERT.equal(2.225073858507201e-308, buffer.readDoubleLE(0));
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buffer[6] = 0xef;
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buffer[7] = 0x7f;
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ASSERT.ok(isNaN(buffer.readDoubleBE(0)));
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ASSERT.equal(1.7976931348623157e+308, buffer.readDoubleLE(0));
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0;
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buffer[4] = 0;
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buffer[5] = 0;
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buffer[6] = 0xf0;
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buffer[7] = 0x3f;
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ASSERT.equal(3.03865e-319, buffer.readDoubleBE(0));
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ASSERT.equal(1, buffer.readDoubleLE(0));
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buffer[6] = 0;
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buffer[7] = 0x40;
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ASSERT.equal(3.16e-322, buffer.readDoubleBE(0));
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ASSERT.equal(2, buffer.readDoubleLE(0));
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buffer[7] = 0xc0;
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ASSERT.equal(9.5e-322, buffer.readDoubleBE(0));
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ASSERT.equal(-2, buffer.readDoubleLE(0));
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buffer[6] = 0x10;
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buffer[7] = 0;
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ASSERT.equal(2.0237e-320, buffer.readDoubleBE(0));
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ASSERT.equal(2.2250738585072014e-308, buffer.readDoubleLE(0));
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buffer[6] = 0;
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ASSERT.equal(0, buffer.readDoubleBE(0));
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ASSERT.equal(0, buffer.readDoubleLE(0));
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ASSERT.equal(false, 1 / buffer.readDoubleLE(0) < 0);
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buffer[7] = 0x80;
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ASSERT.equal(6.3e-322, buffer.readDoubleBE(0));
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ASSERT.equal(0, buffer.readDoubleLE(0));
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ASSERT.equal(true, 1 / buffer.readDoubleLE(0) < 0);
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buffer[6] = 0xf0;
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buffer[7] = 0x7f;
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ASSERT.equal(3.0418e-319, buffer.readDoubleBE(0));
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ASSERT.equal(Infinity, buffer.readDoubleLE(0));
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buffer[6] = 0xf0;
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buffer[7] = 0xff;
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ASSERT.equal(3.04814e-319, buffer.readDoubleBE(0));
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ASSERT.equal(-Infinity, buffer.readDoubleLE(0));
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}
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test(Buffer);
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