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Charles N Wyble - admin
2025-10-24 17:06:14 -05:00
parent 12d0690b91
commit df8c75603f
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qwen/nodejs/node_modules/node-int64/.npmignore generated vendored Normal file
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node_modules
.DS_Store
npm-debug.log

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qwen/nodejs/node_modules/node-int64/Int64.js generated vendored Normal file
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// Int64.js
//
// Copyright (c) 2012 Robert Kieffer
// MIT License - http://opensource.org/licenses/mit-license.php
/**
* Support for handling 64-bit int numbers in Javascript (node.js)
*
* JS Numbers are IEEE-754 binary double-precision floats, which limits the
* range of values that can be represented with integer precision to:
*
* 2^^53 <= N <= 2^53
*
* Int64 objects wrap a node Buffer that holds the 8-bytes of int64 data. These
* objects operate directly on the buffer which means that if they are created
* using an existing buffer then setting the value will modify the Buffer, and
* vice-versa.
*
* Internal Representation
*
* The internal buffer format is Big Endian. I.e. the most-significant byte is
* at buffer[0], the least-significant at buffer[7]. For the purposes of
* converting to/from JS native numbers, the value is assumed to be a signed
* integer stored in 2's complement form.
*
* For details about IEEE-754 see:
* http://en.wikipedia.org/wiki/Double_precision_floating-point_format
*/
// Useful masks and values for bit twiddling
var MASK31 = 0x7fffffff, VAL31 = 0x80000000;
var MASK32 = 0xffffffff, VAL32 = 0x100000000;
// Map for converting hex octets to strings
var _HEX = [];
for (var i = 0; i < 256; i++) {
_HEX[i] = (i > 0xF ? '' : '0') + i.toString(16);
}
//
// Int64
//
/**
* Constructor accepts any of the following argument types:
*
* new Int64(buffer[, offset=0]) - Existing Buffer with byte offset
* new Int64(Uint8Array[, offset=0]) - Existing Uint8Array with a byte offset
* new Int64(string) - Hex string (throws if n is outside int64 range)
* new Int64(number) - Number (throws if n is outside int64 range)
* new Int64(hi, lo) - Raw bits as two 32-bit values
*/
var Int64 = module.exports = function(a1, a2) {
if (a1 instanceof Buffer) {
this.buffer = a1;
this.offset = a2 || 0;
} else if (Object.prototype.toString.call(a1) == '[object Uint8Array]') {
// Under Browserify, Buffers can extend Uint8Arrays rather than an
// instance of Buffer. We could assume the passed in Uint8Array is actually
// a buffer but that won't handle the case where a raw Uint8Array is passed
// in. We construct a new Buffer just in case.
this.buffer = new Buffer(a1);
this.offset = a2 || 0;
} else {
this.buffer = this.buffer || new Buffer(8);
this.offset = 0;
this.setValue.apply(this, arguments);
}
};
// Max integer value that JS can accurately represent
Int64.MAX_INT = Math.pow(2, 53);
// Min integer value that JS can accurately represent
Int64.MIN_INT = -Math.pow(2, 53);
Int64.prototype = {
constructor: Int64,
/**
* Do in-place 2's compliment. See
* http://en.wikipedia.org/wiki/Two's_complement
*/
_2scomp: function() {
var b = this.buffer, o = this.offset, carry = 1;
for (var i = o + 7; i >= o; i--) {
var v = (b[i] ^ 0xff) + carry;
b[i] = v & 0xff;
carry = v >> 8;
}
},
/**
* Set the value. Takes any of the following arguments:
*
* setValue(string) - A hexidecimal string
* setValue(number) - Number (throws if n is outside int64 range)
* setValue(hi, lo) - Raw bits as two 32-bit values
*/
setValue: function(hi, lo) {
var negate = false;
if (arguments.length == 1) {
if (typeof(hi) == 'number') {
// Simplify bitfield retrieval by using abs() value. We restore sign
// later
negate = hi < 0;
hi = Math.abs(hi);
lo = hi % VAL32;
hi = hi / VAL32;
if (hi > VAL32) throw new RangeError(hi + ' is outside Int64 range');
hi = hi | 0;
} else if (typeof(hi) == 'string') {
hi = (hi + '').replace(/^0x/, '');
lo = hi.substr(-8);
hi = hi.length > 8 ? hi.substr(0, hi.length - 8) : '';
hi = parseInt(hi, 16);
lo = parseInt(lo, 16);
} else {
throw new Error(hi + ' must be a Number or String');
}
}
// Technically we should throw if hi or lo is outside int32 range here, but
// it's not worth the effort. Anything past the 32'nd bit is ignored.
// Copy bytes to buffer
var b = this.buffer, o = this.offset;
for (var i = 7; i >= 0; i--) {
b[o+i] = lo & 0xff;
lo = i == 4 ? hi : lo >>> 8;
}
// Restore sign of passed argument
if (negate) this._2scomp();
},
/**
* Convert to a native JS number.
*
* WARNING: Do not expect this value to be accurate to integer precision for
* large (positive or negative) numbers!
*
* @param allowImprecise If true, no check is performed to verify the
* returned value is accurate to integer precision. If false, imprecise
* numbers (very large positive or negative numbers) will be forced to +/-
* Infinity.
*/
toNumber: function(allowImprecise) {
var b = this.buffer, o = this.offset;
// Running sum of octets, doing a 2's complement
var negate = b[o] & 0x80, x = 0, carry = 1;
for (var i = 7, m = 1; i >= 0; i--, m *= 256) {
var v = b[o+i];
// 2's complement for negative numbers
if (negate) {
v = (v ^ 0xff) + carry;
carry = v >> 8;
v = v & 0xff;
}
x += v * m;
}
// Return Infinity if we've lost integer precision
if (!allowImprecise && x >= Int64.MAX_INT) {
return negate ? -Infinity : Infinity;
}
return negate ? -x : x;
},
/**
* Convert to a JS Number. Returns +/-Infinity for values that can't be
* represented to integer precision.
*/
valueOf: function() {
return this.toNumber(false);
},
/**
* Return string value
*
* @param radix Just like Number#toString()'s radix
*/
toString: function(radix) {
return this.valueOf().toString(radix || 10);
},
/**
* Return a string showing the buffer octets, with MSB on the left.
*
* @param sep separator string. default is '' (empty string)
*/
toOctetString: function(sep) {
var out = new Array(8);
var b = this.buffer, o = this.offset;
for (var i = 0; i < 8; i++) {
out[i] = _HEX[b[o+i]];
}
return out.join(sep || '');
},
/**
* Returns the int64's 8 bytes in a buffer.
*
* @param {bool} [rawBuffer=false] If no offset and this is true, return the internal buffer. Should only be used if
* you're discarding the Int64 afterwards, as it breaks encapsulation.
*/
toBuffer: function(rawBuffer) {
if (rawBuffer && this.offset === 0) return this.buffer;
var out = new Buffer(8);
this.buffer.copy(out, 0, this.offset, this.offset + 8);
return out;
},
/**
* Copy 8 bytes of int64 into target buffer at target offset.
*
* @param {Buffer} targetBuffer Buffer to copy into.
* @param {number} [targetOffset=0] Offset into target buffer.
*/
copy: function(targetBuffer, targetOffset) {
this.buffer.copy(targetBuffer, targetOffset || 0, this.offset, this.offset + 8);
},
/**
* Returns a number indicating whether this comes before or after or is the
* same as the other in sort order.
*
* @param {Int64} other Other Int64 to compare.
*/
compare: function(other) {
// If sign bits differ ...
if ((this.buffer[this.offset] & 0x80) != (other.buffer[other.offset] & 0x80)) {
return other.buffer[other.offset] - this.buffer[this.offset];
}
// otherwise, compare bytes lexicographically
for (var i = 0; i < 8; i++) {
if (this.buffer[this.offset+i] !== other.buffer[other.offset+i]) {
return this.buffer[this.offset+i] - other.buffer[other.offset+i];
}
}
return 0;
},
/**
* Returns a boolean indicating if this integer is equal to other.
*
* @param {Int64} other Other Int64 to compare.
*/
equals: function(other) {
return this.compare(other) === 0;
},
/**
* Pretty output in console.log
*/
inspect: function() {
return '[Int64 value:' + this + ' octets:' + this.toOctetString(' ') + ']';
}
};

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Copyright (c) 2014 Robert Kieffer
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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JavaScript Numbers are represented as [IEEE 754 double-precision floats](http://steve.hollasch.net/cgindex/coding/ieeefloat.html). Unfortunately, this means they lose integer precision for values beyond +/- 2^^53. For projects that need to accurately handle 64-bit ints, such as [node-thrift](https://github.com/wadey/node-thrift), a performant, Number-like class is needed. Int64 is that class.
Int64 instances look and feel much like JS-native Numbers. By way of example ...
```js
// First, let's illustrate the problem ...
> (0x123456789).toString(16)
'123456789' // <- what we expect.
> (0x123456789abcdef0).toString(16)
'123456789abcdf00' // <- Ugh! JS doesn't do big ints. :(
// So let's create a couple Int64s using the above values ...
// Require, of course
> Int64 = require('node-int64')
// x's value is what we expect (the decimal value of 0x123456789)
> x = new Int64(0x123456789)
[Int64 value:4886718345 octets:00 00 00 01 23 45 67 89]
// y's value is Infinity because it's outside the range of integer
// precision. But that's okay - it's still useful because it's internal
// representation (octets) is what we passed in
> y = new Int64('123456789abcdef0')
[Int64 value:Infinity octets:12 34 56 78 9a bc de f0]
// Let's do some math. Int64's behave like Numbers. (Sorry, Int64 isn't
// for doing 64-bit integer arithmetic (yet) - it's just for carrying
// around int64 values
> x + 1
4886718346
> y + 1
Infinity
// Int64 string operations ...
> 'value: ' + x
'value: 4886718345'
> 'value: ' + y
'value: Infinity'
> x.toString(2)
'100100011010001010110011110001001'
> y.toString(2)
'Infinity'
// Use JS's isFinite() method to see if the Int64 value is in the
// integer-precise range of JS values
> isFinite(x)
true
> isFinite(y)
false
// Get an octet string representation. (Yay, y is what we put in!)
> x.toOctetString()
'0000000123456789'
> y.toOctetString()
'123456789abcdef0'
// Finally, some other ways to create Int64s ...
// Pass hi/lo words
> new Int64(0x12345678, 0x9abcdef0)
[Int64 value:Infinity octets:12 34 56 78 9a bc de f0]
// Pass a Buffer
> new Int64(new Buffer([0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0]))
[Int64 value:Infinity octets:12 34 56 78 9a bc de f0]
// Pass a Buffer and offset
> new Int64(new Buffer([0,0,0,0,0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0]), 4)
[Int64 value:Infinity octets:12 34 56 78 9a bc de f0]
// Pull out into a buffer
> new Int64(new Buffer([0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0])).toBuffer()
<Buffer 12 34 56 78 9a bc de f0>
// Or copy into an existing one (at an offset)
> var buf = new Buffer(1024);
> new Int64(new Buffer([0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0])).copy(buf, 512);
```

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{
"name": "node-int64",
"description": "Support for representing 64-bit integers in JavaScript",
"url": "http://github.com/broofa/node-int64",
"keywords": [
"math",
"integer",
"int64"
],
"author": "Robert Kieffer <robert@broofa.com>",
"contributors": [],
"dependencies": {},
"license": "MIT",
"lib": ".",
"main": "./Int64.js",
"version": "0.4.0",
"scripts": {
"test": "nodeunit test.js"
},
"repository": {
"type": "git",
"url": "https://github.com/broofa/node-int64"
},
"devDependencies": {
"nodeunit": "^0.9.0"
}
}

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var assert = require('assert');
var Int64 = require('./Int64');
exports.setUp = function(done) {
done();
};
exports.testBufferToString = function(test) {
var int = new Int64(0xfffaffff, 0xfffff700);
test.equal(
int.toBuffer().toString('hex'),
'fffafffffffff700',
'Buffer to string conversion'
);
test.done();
};
exports.testBufferCopy = function(test) {
var src = new Int64(0xfffaffff, 0xfffff700);
var dst = new Buffer(8);
src.copy(dst);
test.deepEqual(
dst,
new Buffer([0xff, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xf7, 0x00]),
'Copy to buffer'
);
test.done();
};
exports.testValueRepresentation = function(test) {
var args = [
[0], '0000000000000000', 0,
[1], '0000000000000001', 1,
[-1], 'ffffffffffffffff', -1,
[1e18], '0de0b6b3a7640000', 1e18,
['0001234500654321'], '0001234500654321', 0x1234500654321,
['0ff1234500654321'], '0ff1234500654321', 0xff1234500654300, // Imprecise!
[0xff12345, 0x654321], '0ff1234500654321', 0xff1234500654300, // Imprecise!
[0xfffaffff, 0xfffff700],'fffafffffffff700', -0x5000000000900,
[0xafffffff, 0xfffff700],'affffffffffff700', -0x5000000000000800, // Imprecise!
['0x0000123450654321'], '0000123450654321', 0x123450654321,
['0xFFFFFFFFFFFFFFFF'], 'ffffffffffffffff', -1
];
// Test constructor argments
for (var i = 0; i < args.length; i += 3) {
var a = args[i], octets = args[i+1], number = args[i+2];
// Create instance
var x = new Int64();
Int64.apply(x, a);
test.equal(x.toOctetString(), octets, 'Constuctor with ' + args.join(', '));
test.equal(x.toNumber(true), number);
}
test.done();
};
exports.testBufferOffsets = function(test) {
var sourceBuffer = new Buffer(16);
sourceBuffer.writeUInt32BE(0xfffaffff, 2);
sourceBuffer.writeUInt32BE(0xfffff700, 6);
var int = new Int64(sourceBuffer, 2);
assert.equal(
int.toBuffer().toString('hex'), 'fffafffffffff700',
'Construct from offset'
);
var targetBuffer = new Buffer(16);
int.copy(targetBuffer, 4);
assert.equal(
targetBuffer.slice(4, 12).toString('hex'), 'fffafffffffff700',
'Copy to offset'
);
test.done();
};
exports.testInstanceOf = function(test) {
var x = new Int64();
assert(x instanceof Int64, 'Variable is not instance of Int64');
var y = {};
assert(!(y instanceof Int64), 'Object is an instance of Int64');
test.done();
};
exports.testCompare = function(test) {
var intMin = new Int64(2147483648, 0);
var intMinPlusOne = new Int64(2147483648, 1);
var zero = new Int64(0, 0);
var intMaxMinusOne = new Int64(2147483647, 4294967294);
var intMax = new Int64(2147483647, 4294967295);
assert(intMin.compare(intMinPlusOne) < 0, "INT64_MIN is not less than INT64_MIN+1");
assert(intMin.compare(zero) < 0, "INT64_MIN is not less than 0");
assert(intMin.compare(zero) < intMax, "INT64_MIN is not less than INT64_MAX");
assert(intMax.compare(intMaxMinusOne) > 0, "INT64_MAX is not greater than INT64_MAX-1");
assert(intMax.compare(zero) > 0, "INT64_MAX is not greater than 0");
assert(intMax.compare(intMin) > 0, "INT64_MAX is not greater than INT_MIN");
test.done();
};
exports.testEquals = function(test) {
var intMin = new Int64(2147483648, 0);
var zero = new Int64(0, 0);
var intMax = new Int64(2147483647, 4294967295);
assert(intMin.equals(intMin), "INT64_MIN !== INT64_MIN");
assert(intMax.equals(intMax), "INT64_MAX !== INT64_MAX");
assert(zero.equals(zero), "0 !== 0");
assert(!intMin.equals(zero), "INT64_MIN === 0");
assert(!intMin.equals(intMax), "INT64_MIN === INT64_MAX");
assert(!intMax.equals(zero), "INT64_MAX === 0");
assert(!intMax.equals(intMin), "INT64_MAX === INT64_MIN");
test.done();
};