Archives
/
MikeMcl_decimal.js
mirror of https://github.com/MikeMcl/decimal.js
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Assign correct constructor when duplicating Decimals.

Browse Source
pull/27/head
Michael Mclaughlin 10 years ago
parent da6ae2b716
commit cd88cd7f07
1 changed files with 70 additions and 67 deletions
Show Stats Download Patch File Download Diff File

137
decimal.js
Unescape View File

@ -12,7 +12,7 @@
*/
var convertBase, DecimalConstructor, noConflict,
var convertBase, decimal, noConflict,
crypto = global['crypto'],
external = true,
id = 0,
@ -588,15 +588,16 @@
/*
Numbers with massively different exponents would result in a massive number of
zeros needing to be prepended, but this can be avoided while still ensuring correct
rounding by limiting the number of zeros to max( precision, i ) + 2, where pr is
precision and i is the length of the coefficient of whichever is greater x or y.
rounding by limiting the number of zeros to max( pr, i ) + 2, where pr is precision and
i is the length of the coefficient of whichever is greater, x or y.
*/
if ( a > ( i += 2 ) ) {
a = i;
t.length = 1;
}
for ( t.reverse(), b = a; b--; t.push(0) );
t.reverse();
for ( b = a; b--; t.push(0) );
t.reverse();
} else {
// Exponents equal. Check digits.
@ -822,7 +823,7 @@
if ( !xc[0] || !yc[0] ) {
// Return y if y is non-zero, x if x is non-zero, or zero if both are zero.
x = yc[0] ? y: new Decimal( xc[0] ? x : a * 0 );
x = yc[0] ? y : new Decimal( xc[0] ? x : a * 0 );
return external ? rnd( x, pr, rm ) : x;
}
@ -1116,29 +1117,26 @@
// Multiply!
for ( i = b - 1; i > -1; i-- ) {
b = 0;
for ( b = 0, j = a + i; j > i; b = b / BASE | 0 ) {
for ( j = a + i; j > i; ) {
b = c[j] + yc[i] * xc[j - i - 1] + b;
c[j--] = b % BASE | 0;
b = b / BASE | 0;
}
if (b) {
c[j] = ( c[j] + b ) % BASE;
}
c[j] = ( c[j] + b ) % BASE | 0;
}
if (b) {
++e;
}
} else if ( !c[0] ) {
// Remove any leading zero.
if ( !c[0] ) {
// Remove leading zero.
c.shift();
}
// Remove trailing zeros.
for ( j = c.length; !c[--j]; c.pop() );
y['c'] = c;
// Get the number of digits of c[0].
@ -1206,7 +1204,7 @@
*
* Note: as with JS numbers, (-0).toFixed(0) is '0', but e.g. (-0.00001).toFixed(0) is '-0'.
*
* [dp] {number} Decimal places. Integer, -MAX_DIGITS to MAX_DIGITS inclusive.
* [dp] {number} Decimal places. Integer, 0 to MAX_DIGITS inclusive.
* [rm] {number} Rounding mode. Integer, 0 to 8 inclusive.
*
* errors true: Throw if dp and rm are not undefined, null or integers in range.
@ -1273,7 +1271,7 @@
* fractionGroupSize : 0
* };
*
* [dp] {number} Decimal places. Integer, -MAX_DIGITS to MAX_DIGITS inclusive.
* [dp] {number} Decimal places. Integer, 0 to MAX_DIGITS inclusive.
* [rm] {number} Rounding mode. Integer, 0 to 8 inclusive
*
* (If dp or rm are invalid the error message will give the offending method call as toFixed.)
@ -1288,10 +1286,10 @@
var i,
isNeg = x['s'] < 0,
format = x['constructor']['format'],
groupSeparator = format['groupSeparator'],
g1 = +format['groupSize'],
g2 = +format['secondaryGroupSize'],
f = x['constructor']['format'],
groupSeparator = f['groupSeparator'],
g1 = +f['groupSize'],
g2 = +f['secondaryGroupSize'],
arr = x.toFixed( dp, rm ).split('.'),
intPart = arr[0],
fractionPart = arr[1],
@ -1320,9 +1318,9 @@
}
return fractionPart
? intPart + format['decimalSeparator'] + ( ( g2 = +format['fractionGroupSize'] )
? intPart + f['decimalSeparator'] + ( ( g2 = +f['fractionGroupSize'] )
? fractionPart.replace( new RegExp( '\\d{' + g2 + '}\\B', 'g' ),
'$&' + format['fractionGroupSeparator'] )
'$&' + f['fractionGroupSeparator'] )
: fractionPart )
: intPart;
};
@ -1393,7 +1391,8 @@
break;
}
d0 = d1, d1 = d2;
d0 = d1;
d1 = d2;
n1 = n0['plus']( q['times']( d2 = n1 ) );
n0 = d2;
@ -1616,7 +1615,7 @@
Math.LN10 + x['e'] + 1 ) )
: new Decimal( b + '' )['e'];
// Estimate may be incorrect e.g.: x: 0.999999999999999999, y: 2.29, e: 0, r.e:-1
// Estimate may be incorrect e.g. x: 0.999999999999999999, y: 2.29, e: 0, r.e:-1
// Overflow/underflow?
if ( e > Decimal['maxE'] + 1 || e < Decimal['minE'] - 1 ) {
@ -1883,7 +1882,8 @@
r += s;
}
for ( j = r.length; r.charAt(--j) == '0'; );
// '0'
for ( j = r.length; r.charCodeAt(--j) === 48; );
return r.slice( 0, j + 1 || 1 );
}
@ -2012,9 +2012,7 @@
strL = str.length;
for ( ; i < strL; ) {
for ( arrL = arr.length; arrL--; arr[arrL] *= baseIn );
arr[ j = 0 ] += NUMERALS.indexOf( str.charAt( i++ ) );
for ( ; j < arr.length; j++ ) {
@ -2139,7 +2137,7 @@
// No negative numbers: the caller will add the sign.
return str;
}
};
})();
@ -2434,7 +2432,7 @@
}
return q;
}
};
})();
@ -2899,7 +2897,7 @@
Decimal = x['constructor'];
// Don't round if sd is null or undefined.
r: if ( sd != null ) {
out: if ( sd != null ) {
// Infinity/NaN.
if ( !( xc = x['c'] ) ) {
@ -2946,7 +2944,7 @@
j = i - LOGBASE + 1;
} else {
break r;
break out;
}
} else {
n = k = xc[xci];
@ -3082,7 +3080,7 @@
}
DecimalConstructor = (function () {
decimal = (function () {
// Private functions used by static Decimal methods.
@ -3353,7 +3351,7 @@
* n {number|string|Decimal} The power to which to raise the base of the natural log.
*
*/
function exp(n) { return new this(n)['exp']() }
function exp(n) { return new this(n)['exp'](); }
/*
@ -3371,7 +3369,7 @@
* n {number|string|Decimal}
*
*/
function ln(n) { return new this(n)['ln']() }
function ln(n) { return new this(n)['ln'](); }
/*
@ -3384,7 +3382,7 @@
* y {number|string|Decimal} The base of the logarithm.
*
*/
function log( x, y ) { return new this(x)['log'](y) }
function log( x, y ) { return new this(x)['log'](y); }
/*
@ -3422,7 +3420,7 @@
* arguments {number|string|Decimal}
*
*/
function max() { return maxOrMin( this, arguments, 'lt' ) }
function max() { return maxOrMin( this, arguments, 'lt' ); }
/*
@ -3431,7 +3429,7 @@
* arguments {number|string|Decimal}
*
*/
function min() { return maxOrMin( this, arguments, 'gt' ) }
function min() { return maxOrMin( this, arguments, 'gt' ); }
/*
@ -3439,7 +3437,8 @@
*/
var parseDecimal = (function () {
var isValid = /^-?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i,
trim = String.prototype.trim || function () {return this.replace(/^\s+|\s+$/g, '')};
trim = String.prototype.trim ||
function () { return this.replace(/^\s+|\s+$/g, ''); };
return function ( Decimal, x, n, b ) {
var d, e, i, isNum, orig, valid;
@ -3455,7 +3454,7 @@
if ( b == null && isValid.test(n) ) {
// Determine sign.
x['s'] = n.charAt(0) == '-' ? ( n = n.slice(1), -1 ) : 1;
x['s'] = n.charCodeAt(0) === 45 ? ( n = n.slice(1), -1 ) : 1;
// Either n is not a valid Decimal or a base has been specified.
} else {
@ -3471,7 +3470,7 @@
n = trim.call(n).replace( /^\+(?!-)/, '' );
x['s'] = n.charAt(0) == '-' ? ( n = n.replace( /^-(?!-)/, '' ), -1 ) : 1;
x['s'] = n.charCodeAt(0) === 45 ? ( n = n.replace( /^-(?!-)/, '' ), -1 ) : 1;
if ( b != null ) {
@ -3562,10 +3561,10 @@
}
// Determine leading zeros.
for ( i = 0; n.charAt(i) == '0'; i++ );
for ( i = 0; n.charCodeAt(i) === 48; i++ );
// Determine trailing zeros.
for ( b = n.length; n.charAt(--b) == '0'; );
for ( b = n.length; n.charCodeAt(--b) === 48; );
n = n.slice( i, b + 1 );
@ -3633,9 +3632,10 @@
// Zero.
x['c'] = [ x['e'] = 0 ];
}
id = 0;
}
return x;
};
})();
@ -3646,7 +3646,7 @@
* y {number|string|Decimal} The exponent.
*
*/
function pow( x, y ) { return new this(x)['pow'](y) }
function pow( x, y ) { return new this(x)['pow'](y); }
/*
@ -3808,7 +3808,7 @@
* n {number|string|Decimal}
*
*/
function sqrt(n) { return new this(n)['sqrt']() }
function sqrt(n) { return new this(n)['sqrt'](); }
/*
@ -3830,13 +3830,13 @@
/*
* Create and return a new Decimal constructor.
* Create and return a Decimal constructor.
*
*/
function DecimalFactory(obj) {
function decimalFactory(obj) {
/*
* The Decimal constructor.
* The Decimal constructor and exported function.
* Create and return a new instance of a Decimal object.
*
* n {number|string|Decimal} A numeric value.
@ -3853,17 +3853,20 @@
return new Decimal( n, b );
}
// Retain a reference to this Decimal constructor, and shadow
// Decimal.prototype.constructor which points to Object.
x['constructor'] = Decimal;
// Duplicate.
if ( n instanceof Decimal ) {
if ( b == null ) {
id = 0;
x['constructor'] = n['constructor'];
x['s'] = n['s'];
x['e'] = n['e'];
x['c'] = ( n = n['c'] ) ? n.slice() : n;
return;
return x;
} else if ( b == 10 ) {
return rnd( new Decimal(n), Decimal['precision'], Decimal['rounding'] );
@ -3872,13 +3875,13 @@
}
}
return parseDecimal( x['constructor'] = Decimal, x, n, b );
return parseDecimal( Decimal, x, n, b );
}
/* ************************ CONSTRUCTOR DEFAULT PROPERTIES *****************************
/* ************************ CONSTRUCTOR DEFAULT PROPERTIES ************************** */
/*
These default values must be integers within the stated ranges (inclusive).
Most of these values can be changed during run-time using Decimal.config.
*/
@ -3953,12 +3956,12 @@
// Format specification for the Decimal.prototype.toFormat method
Decimal.format = {
decimalSeparator : '.',
groupSeparator : ',',
groupSize : 3,
secondaryGroupSize : 0,
fractionGroupSeparator : '\xA0', // non-breaking space
fractionGroupSize : 0
decimalSeparator: '.',
groupSeparator: ',',
groupSize: 3,
secondaryGroupSize: 0,
fractionGroupSeparator: '\xA0', // non-breaking space
fractionGroupSize: 0
};
@ -4003,7 +4006,7 @@
//Decimal['trunc'] = trunc;
Decimal['config'] = config;
Decimal['constructor'] = DecimalFactory;
Decimal['constructor'] = decimalFactory;
Decimal['exp'] = exp;
Decimal['ln'] = ln;
Decimal['log'] = log;
@ -4020,7 +4023,7 @@
return Decimal;
}
return DecimalFactory();
return decimalFactory();
})();
@ -4031,12 +4034,12 @@
if ( typeof define == 'function' && define.amd ) {
define(function () {
return DecimalConstructor;
return decimal;
});
// Node and other environments that support module.exports.
} else if ( typeof module != 'undefined' && module.exports ) {
module.exports = DecimalConstructor;
module.exports = decimal;
if ( !crypto ) {
@ -4049,12 +4052,12 @@
} else {
noConflict = global['Decimal'];
DecimalConstructor['noConflict'] = function () {
decimal['noConflict'] = function () {
global['Decimal'] = noConflict;
return DecimalConstructor;
return decimal;
};
global['Decimal'] = DecimalConstructor;
global['Decimal'] = decimal;
}
})(this);

Write Preview
Loading…
Cancel
Save